Publications by authors named "Chun Luo"

122 Publications

miRNA-193a-3p Regulates the AKT2 Pathway to Inhibit the Growth and Promote the Apoptosis of Glioma Cells by Targeting ALKBH5.

Front Oncol 2021 23;11:600451. Epub 2021 Apr 23.

Department of Neurosurgery, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, China.

Emerging evidence indicates that microRNA (miR)-193a-3p is involved in the tumor progression of various cancers. However, the biological functions and precise molecular mechanisms of miR-193a-3p in gliomas have not been well documented. Accordingly, this study focused on the tumor suppressor role and molecular mechanisms of miR-193a-3p in glioma cells. miR-193a-3p expression was determined by qRT-PCR in glioma tissues and cell lines. U251 and U87 glioma cells were transfected with a miR-193a-3p mimic. The effects of miR-193a-3p on cell growth and apoptosis were investigated using MTT, colony-forming, and flow cytometry assays. Overexpression of miR-193a-3p in U87 cells also significantly suppressed tumorigenicity and induced apoptosis in the xenograft mouse model. Luciferase assays were conducted to determine if ALKBH5 is a direct target of miR-193a-3p in glioma cells. Immunoprecipitation was used to explore the interaction between ALKBH5 and RAC-serine/threonine-protein kinase 2 (AKT2) in glioma cells. miR-193a-3p was downregulated in glioma tissues and cell lines. miR-193a-3p treatment suppressed proliferation and promoted apoptosis in both U251 and U87 cells. Bioinformatics analysis and luciferase reporter assay identified a novel miR-193a-3p target, ALKBH5. Notably, the antitumor effect of miR-193a-3p transfection in glioma cells may be due to the miR-193a-3p-induced inhibition of AKT2 expression caused by the suppression of ALKBH5 expression. Furthermore, immunoprecipitation indicated that ALKBH5 physically interacted with AKT2 through an RNA-independent mechanism in glioma cells. miR-193a-3p directly targets ALKBH5 to inhibit the growth and promote the apoptosis of glioma cells by suppressing the AKT2 pathway both and , and the physical interaction between ALKBH5 and AKT2 is essential for suppressing cell apoptosis by upregulating miR-193a-3p in glioma cells. Our study revealed that the antitumor effects of miR-193a-3p on glioma cells is due to ALKBH5 mediation of the AKT2-induced intrinsic apoptosis signaling pathway.
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http://dx.doi.org/10.3389/fonc.2021.600451DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8103841PMC
April 2021

[Role of Dual-layer Detector Energy Spectral CT in Resting Myocardial Perfusion Imaging for Patients with Normal Coronary Artery].

Zhongguo Yi Xue Ke Xue Yuan Xue Bao 2021 Apr;43(2):230-234

Department of Radiology,Chinese PLA General Hospital First Medical Center,Beijing 100853,China.

Objective To investigate the role of dual-layer detector energy spectral CT in resting myocardial perfusion imaging for patients with normal coronary artery. Methods One hundred and fifty-six patients with suspected coronary heart disease underwent dual-layer detector energy spectral CT coronary angiography,and resting myocardial perfusion imaging was performed for 28 patients with normal coronary artery.According to American Heart Association's 17-segmentmodel,the iodine density and effective atomic number(Z value)of each myocardial segment(except for apical segment)were measured and normalized to those of the aorta.All the data were quantitatively evaluated using ANOVA or Friedman test. Results Iodine density and Z value of myocardial segments in middle plane were significantly different(all P<0.001).The iodine density and Z value showed no significant difference between segments in basal and apical plane(all P > 0.05). Conclusions Iodine density and Z value of myocardial segments can be quantitatively evaluated using dual-layer detector energy spectral CT.Resting myocardial perfusion of segments in middle plane are significantly different in patients with normal coronary artery.
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http://dx.doi.org/10.3881/j.issn.1000-503X.12862DOI Listing
April 2021

IL-27 Protects the Brain from Ischemia-Reperfusion Injury via the gp130/STAT3 Signaling Pathway.

J Mol Neurosci 2021 Apr 13. Epub 2021 Apr 13.

Department of Neurology, National Hospital of Guangxi Zhuang Autonomous Region, No. 232, Mingxiu East Road, 530001 Nanning, Guangxi Province, China.

The occurrence of ischemia-reperfusion (I/R) injury leads to dysfunction as well as high rates of morbidity and mortality in stroke, and new effective therapeutic strategies for I/R are still needed. We investigated the effect of IL-27 on I/R injury-induced neurological function impairment, cerebral infarction volume and variation in levels of inflammatory factors in mice with middle cerebral artery occlusion (MCAO), as well as concentration of LDH and neuronal apoptosis in a neuron oxygen-glucose deprivation and reperfusion (OGD/R) model mediated by gp130/STAT3 signaling in vitro. Our results indicated that IL-27 could bind to its receptor of gp130 to attenuate the I/R injury-induced impairment function and cerebral infarction volume, and decrease inflammatory cytokines TNF-α, IL-1β and MCP-1 but increase anti-inflammatory factors IL-10 and TGF-β in vivo, while inhibiting LDH leakage and neuronal apoptosis through activation of STAT3 to antagonize I/R induction. Our results suggest that IL-27 may protect the brain from I/R injury through the gp130/STAT3 signaling pathway.
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http://dx.doi.org/10.1007/s12031-021-01802-0DOI Listing
April 2021

Saponins Modulate the Inflammatory Response and Improve IBD-Like Symptoms via TLR/NF-[Formula: see text]B and MAPK Signaling Pathways.

Am J Chin Med 2021 7;49(4):925-939. Epub 2021 Apr 7.

Institute of Chinese Medical Sciences, State Key Laboratory of Quality Research in Chinese Medicine, University of Macau, Macao 999078, P. R. China.

saponins (PNS) are the main active ingredients of (Burk) F. H. Chen, which are used as traditional Chinese medicine for thousands of years and have various clinical effects, including anti-inflammation, anti-oxidation, and cardiovascular protection. Inflammatory bowel disease (IBD) is a complex gastrointestinal inflammatory disease that cannot be cured completely nowadays. The anti-inflammatory and protective effects of PNS were analyzed and in dextran sulfate sodium (DSS)-induced colitis mouse model. PNS inhibited the release of nitric oxide (NO), tumor necrosis factor-[Formula: see text] (TNF-[Formula: see text], interleukin-6 (IL-6), and monocyte chemoattractant protein-1 (MCP-1) in Pam3CSK4-induced RAW 264.7 macrophages. In the animal study, compared with DSS-induced mice, PNS reduced the expression of pro-inflammatory cytokines (TNF-[Formula: see text], IL-6, and MCP-1) in the colon tissues. Furthermore, PNS treatment led to a remarkable reduction in the activation of the inhibitor of nuclear factor kappa-B kinase [Formula: see text]/[Formula: see text] (IKK[Formula: see text]/[Formula: see text], I[Formula: see text]B[Formula: see text] and p65 induced by DSS. On the other hand, PNS inhibited the phosphorylation of c-Jun N-terminal kinase (JNK), p38, and extracellular regulated protein kinase 1/2 (ERK1/2). Taken together, our results suggested that PNS conferred profound protection for colitis mice through the downregulation of mitogen-activated protein kinase (MAPK) and NF-[Formula: see text]B signaling pathways, which were associated with reducing inflammatory responses, alleviating tissue damage, and maintaining of intestinal integrity and functionality.
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http://dx.doi.org/10.1142/S0192415X21500440DOI Listing
April 2021

MgTiO spinel modified by nitrogen doping as a Visible-Light-Active photocatalyst for antibacterial activity.

Chem Eng J 2021 Apr 6;410:128410. Epub 2021 Jan 6.

Clinical and Central Lab, Putuo People's Hospital, Department of Neurosurgery, Tongji Hospital, Tongji University School of Medicine, Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai, China.

Nitrogen doped MgTiO spinel, i.e. MgTiON, has been synthesized and investigated as a photocatalyst for antibacterial activity. MgTiON demonstrates superior photocatalytic activity for disinfection under visible light illumination (λ ≥ 400 nm). Complete disinfection of at a bacterial cell density of 1.0 × 10 CFU mL can be achieved within merely 60 min. MgTiON is capable of generating superoxide radicals (O) under visible light illumination which are the reactive oxygen species (ROSs) for bacteria disinfection. DFT calculations have verified the importance of nitrogen dopants in improving the visible light sensitivity of MgTiON. The facile synthesis, low cost, good biocompatibility and high disinfection activity of MgTiON warrant promising applications in the field of water purification and antibacterial products.
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http://dx.doi.org/10.1016/j.cej.2021.128410DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7833804PMC
April 2021

Prognostic roles of KL-6 in disease severity and lung injury in COVID-19 patients: A longitudinal retrospective analysis.

J Med Virol 2021 04 22;93(4):2505-2512. Epub 2021 Jan 22.

Infectious Diseases Institute, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China.

To investigate the dynamic changes of Krebs von den Lungen-6 (KL-6) among patients with coronavirus disease 2019 (COVID-19) and the role of KL-6 as a noninvasive biomarker for predicting long-term lung injury, the clinical information and laboratory tests of 166 COVID-19 patients were collected, and a correlation analysis between KL-6 and other parameters was conducted. There were 17 (10.2%, 17/166) severe/critical and 149 (89.8%, 149/166) mild COVID-19 patients in our cohort. Serum KL-6 was significantly higher in severe/critical COVID-19 patients than in mild patients (median 898.0 vs. 451.2 U/ml, p < .001). KL-6 was next confirmed to be a sensitive and specific biomarker for distinguishing mild and severe/critical patients and correlate to computed tomography lung lesions areas. Serum KL-6 concentration during the follow-up period (>100 days postonset) was well correlated to those concentrations within 10 days postonset (Pearson r = .867, p < .001), indicating the prognostic value of KL-6 levels in predicting lung injury after discharge. Finally, elevated KL-6 was found to be significantly correlated to coagulation disorders, and T cells subsets dysfunctions. In summary, serum KL-6 is a biomarker for assessing COVID-19 severity and predicting the prognosis of lung injury of discharged patients.
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http://dx.doi.org/10.1002/jmv.26793DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8013517PMC
April 2021

Unique genomic features and prognostic value of COSMIC mutational signature 4 in lung adenocarcinoma and lung squamous cell carcinoma.

Ann Transl Med 2020 Sep;8(18):1176

Department of Neurosurgery, Tongji Hospital, Tongji University School of Medicine, Shanghai, China.

Background: Analysis of mutational signatures is becoming routine in cancer genomics, with implications for pathogenesis, classification, and prognosis. Among the signatures cataloged at COSMIC, mutational signature 4 has been linked to smoking. However, the distribution of signature 4 in Chinese lung cancer patients has not been evaluated, and its clinical value has not been evaluated. Here we survey mutational signatures in Chinese lung cancer patients and explore the relationship between signature 4 and other genomic features in the patients.

Methods: We extracted mutational signatures from whole-exome sequencing data of Chinese non-small cell lung cancer patients. The data included 401 lung adenocarcinoma (LUAD) and 92 squamous cell carcinoma (LUSC). We then performed statistical analysis to search for genomic and clinical features that can be linked to mutation signatures.

Results: We found signature 4 is the most frequent mutational signature in LUSC and the second most frequent in LUAD. Fifty-six LUAD and thirty-five LUSC patients were named with high signature 4 similarities (cosine similarity >0.7). These patients have shorter survival and higher tumor mutational burden comparing to those with low signature 4 similarities. Dozens of genes with single nucleotide variation, index mutations, and copy number variations were differentially enriched in the patients with high signature 4 similarities. Among these genes, , , , , , , and are common in both LUADs and LUSCs with high signature 4 similarities, showing that these genes are tightly associated with signature 4.

Conclusions: The present study is the first to report a comparison in Chinese NSCLC patients with or without COSMIC mutational signature 4. These results will help find the Signature 4 related mutational process in NSCLC.
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http://dx.doi.org/10.21037/atm-20-5952DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7576056PMC
September 2020

Systematic evaluation during early-phase ischemia predicts outcomes in middle cerebral artery occlusion mice.

Neuroreport 2021 01;32(1):29-37

Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China.

Identifying outcome predictors for ischemic stroke is beneficial for choosing correct intervention protocols. Thus, it is necessary to systemically evaluate histological outcome-associated changes such as hemodynamics, behavior, and body weight during the early phase of ischemia. Here, 50 mice were subjected to 45-min middle cerebral artery occlusion (MCAO) using Longa's method. Hemodynamic changes were monitored by Doppler laser probe, and behaviors were evaluated by scales while the tissues were visualized by staining. The results by correlation analysis demonstrated that with a probe located near the posterior boundary zone of MCA territory, the latency of anoxic depolarization, as well as the cerebral blood flow reduction during MCAO were confirmed to be predictors for the infarct volume on day 3 post-ischemia; histology showed that the risk of a space-occupying secondary hemorrhage was significantly correlated with the increase of infarct volume versus the traditional Bederson's neurological deficit scale, a renewed combined behavioral scoring method performed nicely to reflect the severity of tissue lesions. Weight loss was a valuable metric for the enlargement of both infarct volume and secondary hemorrhage. Monitoring changes during early-phase ischemia may benefit the optimization of ischemia models and the discovery of potential intervention targets.See Video Abstract, http:/links.lww.com/WNR/A601).
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http://dx.doi.org/10.1097/WNR.0000000000001553DOI Listing
January 2021

Facile Interfacial Synthesis of Densely Spiky Gold Nano-Chestnuts With Full Spectral Absorption for Photothermal Therapy.

Front Bioeng Biotechnol 2020 26;8:599040. Epub 2020 Oct 26.

Department of Neurosurgery, Tongji Hospital, Tongji University School of Medicine, Shanghai, China.

The gold nanostructure is regarded as the most promising photothermal agent due to its strong localized surface plasma resonance (LSPR) effect. In particular, the gold nanostructures with sharp spikes on the surface have higher optical signal enhancement, owing to the sharp tips drastically enhancing the intense nanoantenna effect. However, current approaches for the synthesis of spiky gold nanostructures are either costly, complicated, or uncontrollable. Herein, we report a novel strategy to synthesize gold nano-chestnuts (SGNCs) with sharp spikes as an excellent photothermal agent. The SGNCs were prepared by a facile one-pot interfacial synthetic method, and their controllable preparation mechanism was acquired. The SGNCs exhibited ideal full-spectrum absorption and showed excellent photothermal effect. They have a photothermal conversion efficiency (η) as high as 52.9%, which is much higher than traditional photothermal agents. The and results show that the SGNCs could efficiently ablate the tumor cells. Thus, the SGNCs have great potential in photothermal therapy applied in malignant tumors.
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http://dx.doi.org/10.3389/fbioe.2020.599040DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7649415PMC
October 2020

MicroRNA‑138 modulates glioma cell growth, apoptosis and invasion through the suppression of the AKT/mTOR signalling pathway by targeting CREB1.

Oncol Rep 2020 Dec 15;44(6):2559-2568. Epub 2020 Oct 15.

Department of Neurosurgery, Changzheng Hospital, Navy Medical University, Shanghai 200003, P.R. China.

Alterations in the expression of microRNA (miR)‑138 have been demonstrated to result in the development of several malignant tumours. However, the possible function of miR‑138 in human glioma cells remains unclear. The present study demonstrated that miR‑138 was significantly downregulated in 48 human glioma specimens by quantitative PCR analysis. The upregulation of miR‑138 exerted significant antiproliferative and anti‑invasive effects on glioma cells and promoted their apoptosis. In addition, cAMP response element‑binding protein 1 (CREB1) was confirmed as a direct target gene of miR‑138 by luciferase gene reporter assay, and the antitumour effect of miR‑138 on glioma cells was significantly reversed by CREB1 overexpression. Moreover, the molecular mechanisms underlying the tumour‑suppressive role of miR‑138 in malignant glioma may be associated with the dephosphorylation of AKT/mTOR caused by the miR‑138 upregulation‑induced decrease in CREB1 expression in glioma cells. The results of the present study indicated that miR‑138 may affect CREB1/AKT/mTOR signalling to regulate the proliferation, apoptosis and invasion of glioma cells and the malignant progression of glioma, thereby suggesting that miR‑138 may be a potential target for the treatment of gliomas.
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http://dx.doi.org/10.3892/or.2020.7809DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7640360PMC
December 2020

A compromised specific humoral immune response against the SARS-CoV-2 receptor-binding domain is related to viral persistence and periodic shedding in the gastrointestinal tract.

Cell Mol Immunol 2020 11 9;17(11):1119-1125. Epub 2020 Oct 9.

Guangzhou Eighth People's Hospital, Guangzhou, 510440, China.

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has been redetected after discharge in some coronavirus disease 2019 (COVID-19) patients. The reason for the recurrent positivity of the test and the potential public health concern due to this occurrence are still unknown. Here, we analyzed the viral data and clinical manifestations of 289 domestic Chinese COVID-19 patients and found that 21 individuals (7.3%) were readmitted for hospitalization after detection of SARS-CoV-2 after discharge. First, we experimentally confirmed that the virus was involved in the initial infection and was not a secondary infection. In positive retests, the virus was usually found in anal samples (15 of 21, 71.4%). Through analysis of the intracellular viral subgenomic messenger RNA (sgmRNA), we verified that positive retest patients had active viral replication in their gastrointestinal tracts (3 of 16 patients, 18.7%) but not in their respiratory tracts. Then, we found that viral persistence was not associated with high viral titers, delayed viral clearance, old age, or more severe clinical symptoms during the first hospitalization. In contrast, viral rebound was associated with significantly lower levels of and slower generation of viral receptor-binding domain (RBD)-specific IgA and IgG antibodies. Our study demonstrated that the positive retest patients failed to create a robust protective humoral immune response, which might result in SARS-CoV-2 persistence in the gastrointestinal tract and possibly in active viral shedding. Further exploration of the mechanism underlying the rebound in SARS-CoV-2 in this population will be crucial for preventing virus spread and developing effective vaccines.
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http://dx.doi.org/10.1038/s41423-020-00550-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7546387PMC
November 2020

Ferrostatin-1 mitigates cognitive impairment of epileptic rats by inhibiting P38 MAPK activation.

Epilepsy Behav 2020 02 19;103(Pt A):106670. Epub 2019 Dec 19.

Department of Neurology, The First Affiliated Hospital of Guangxi Medical University, 6th Shuangyong Road, Nanning, China. Electronic address:

Evidence indicates that ferrostain-1 (Fer-1), a specific inhibitor of ferroptosis, could ameliorate cognitive dysfunction of rats with kainic acid (KA)-induced temporal lobe epilepsy (TLE) by suppressing ferroptosis processes. Recent studies suggest that P38 mitogen-activated protein kinase (MAPK) pathway could be mediated by ferroptosis processes. The activation of P38 MAPK results in cognitive impairment by suppressing the expression of synaptic plasticity-related proteins. However, it is unclear whether Fer-1 can mitigate cognitive impairment of rats with KA-induced TLE by inhibiting P38 MAPK activation. In the present study, treatment with Fer-1 blocked the activation of P38 MAPK, which resulted in an increased expression of synaptophysin (SYP) and postsynaptic density protein 95 (PSD-95) in the hippocampus of rats with KA-induced TLE, hence, ameliorating their cognitive impairment. Also, P38 MAPK activation in the hippocampus of the rats reduced the expression of both PSD-95 and SYP proteins. Treatment of the rats with SB203580, a P38 MAPK-specific inhibitor, prevented the activation of P38 MAPK, which resulted in an increase in SYP and PSD95 protein levels in the hippocampus. These results suggest that Fer-1 could mitigate the cognitive impairment by suppressing P38 MAPK activation thus restoring the expression of synaptic proteins. Ferroptosis processes might be involved in suppressing synaptic protein expression.
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http://dx.doi.org/10.1016/j.yebeh.2019.106670DOI Listing
February 2020

Increased RLIP76 expression in IDH1 wild‑type glioblastoma multiforme is associated with worse prognosis.

Oncol Rep 2020 Jan 30;43(1):188-200. Epub 2019 Oct 30.

Department of Neurosurgery, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China.

Mutation of the isocitrate dehydrogenase (IDH) gene is regarded a novel indicator for the prognosis of patients with glioma. However, the role of the IDH1 gene mutations in carcinogenesis and the mechanisms underlying their function in glioblastoma multiforme (GBM) remain unknown. The present study aimed to determine whether the association of RLIP76 with the different IDH1 mutational status could serve as a putative biomarker for improving disease prognosis. Quantitative PCR, western blotting and immunohistochemical staining assays were used to investigate the expression levels of RLIP76 in 124 patients with GBM with different IDH1 mutational status. In addition, the association between RLIP76 expression, IDH1 mutational status and clinicopathological characteristics was investigated. The effects of RLIP76 expression and IDH1 mutational status on cell proliferation, cell apoptosis, and cell signaling were examined by Cell Counting Kit‑8, flow cytometry and western blot assays, respectively. The data demonstrated that IDH1 wild‑type (IDH1Wt) patients with low RLIP76 expression exhibited improved overall and progression‑free survival. This effect was not observed in patients with IDH1 mutant (IDH1Mut) GBM. In vitro assays demonstrated that knockdown of IDH1 or overexpression of the IDH1 R132H mutation suppressed cell proliferation and promoted cell apoptosis in U87 glioma cells. Mechanistic studies further indicated that although the IDH1 R132H mutant phenotype exhibited similar antitumor effects on GBM cells as those observed with the IDH1 knockdown, it acted via a different mechanism with regard to the regulation of the apoptosis signaling pathway. IDH1 R132H mutant cells promoted p53‑induced apoptosis, while the IDH1 knockdown inhibited the RLIP76‑dependent apoptotic pathway in glioma cells. The findings of the present study provided insight to the contribution of IDH1 mutation in the development of GBM and indicated that RLIP76 may be considered as a prognostic biomarker of IDH1Wt GBM.
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http://dx.doi.org/10.3892/or.2019.7394DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6908935PMC
January 2020

Distinct Drivers of Core and Accessory Components of Soil Microbial Community Functional Diversity under Environmental Changes.

mSystems 2019 Oct 1;4(5). Epub 2019 Oct 1.

State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China.

It is a central ecological goal to explore the effects of global change factors on soil microbial communities. The vast functional gene repertoire of soil microbial communities is composed of both core and accessory genes, which may be governed by distinct drivers. This intuitive hypothesis, however, remains largely unexplored. We conducted a 5-year nitrogen and water addition experiment in the Eurasian steppe and quantified microbial gene diversity via shotgun metagenomics. Nitrogen addition led to an 11-fold increase in the abundance (based on quantitative PCR [qPCR]) of ammonia-oxidizing bacteria, which have mainly core community genes and few accessory community genes. Thus, nitrogen addition substantially increased the relative abundance of many core genes at the whole-community level. Water addition stimulated both plant diversity and microbial respiration; however, increased carbon/energy resources from plants did not counteract increased respiration, so soil carbon/energy resources became more limited. Thus, water addition selected for microorganisms with genes responsible for degrading recalcitrant soil organic matter. Accordingly, many other microorganisms without these genes (but likely with other accessory community genes due to relatively stable average microbial genome size) were selected against, leading to the decrease in the diversity of accessory community genes. In summary, nitrogen addition primarily affected core community genes through nitrogen-cycling processes, and water addition primarily regulated accessory community genes through carbon-cycling processes. Although both gene components may significantly respond as the intensity of nitrogen/water addition increases, our results demonstrated how these common global change factors distinctly impact each component. Our results demonstrated increased ecosystem nitrogen and water content as the primary drivers of the core and accessory components of soil microbial community functional diversity, respectively. Our findings suggested that more attention should be paid to certain components of community functional diversity under specific global change conditions. Our findings also indicated that microbial communities have adapted to nitrogen addition by strengthening the function of ammonia oxidization to deplete the excess nitrogen, thus maintaining ecosystem homeostasis. Because community gene richness is primarily determined by the presence/absence of accessory community genes, our findings further implied that strategies such as maintaining the amount of soil organic matter could be adopted to effectively improve the functional gene diversity of soil microbial communities subject to global change factors.
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http://dx.doi.org/10.1128/mSystems.00374-19DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6774018PMC
October 2019

Interferon alpha treatment leads to a high rate of hepatitis B surface antigen seroconversion in Chinese children with chronic hepatitis B.

J Viral Hepat 2019 07;26 Suppl 1:77-84

Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China.

Chronic hepatitis B virus (HBV) infection (CHB) in children remains a public health challenge despite significant success in programme is established to prevent mother-to-child transmission. In particular, CHB in Chinese children are mostly acquired through vertical transmission, which differs from the common infection route reported in other countries and regions. This situation has resulted in a high endemic prevalence of CHB in Chinese adults. Thus, successful treatment of children with CHB will prevent the development of advanced liver diseases in late adulthood. However, there is still no consensus on the clinical guideline to treat paediatric CHB. In this study, we evaluated the potential of interferon alpha (IFNa) treatment for Chinese children with CHB. A total of 41 patients with CHB aged 3-17 years were enrolled in this retrospective study: 21 patients were treated with pegylated (PEG)-IFNa and 20 patients without treatment served as the control group. The rates of HBV DNA suppression, hepatitis B e antigen (HBeAg) clearance and hepatitis B surface antigen (HBsAg) clearance were significantly higher in the PEG-IFNa treatment group than in the control group (P < 0.05 at 48 weeks). Unexpectedly, PEG-IFNa treatment achieved a high rate of HBsAb production, far exceeding the clinical outcome in documented PEG-IFNa-treated CHB adults. Further analysis revealed that younger children (3-6 years old) were more responsive to PEG-IFNa treatment with respect to achieving a protective level of HBsAb in a short treatment cycle than adolescents (10-17 years old). Overall, these results indicate that the immune system of children might have a preserved PEG-IFNa-mediated mechanism to completely control HBV, which can help to design new strategies to treat CHB patients.
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http://dx.doi.org/10.1111/jvh.13165DOI Listing
July 2019

A novel lncRNA-LINC01116 regulates tumorigenesis of glioma by targeting VEGFA.

Int J Cancer 2020 01 11;146(1):248-261. Epub 2019 Jun 11.

Department of Neurosurgery, Tongji Hospital, Tongji University School of Medicine, Shanghai, China.

Brain glioma is the most common malignant tumor of the central nervous system, and one of the leading causes of death in patients with intracranial tumors. The clinical outcome of glioma is usually poor due to abundant vascularity, fast growth and susceptibility of invasion to normal brain tissues. Our microarray study showed that lncRNA-LINC01116 was significantly upregulated in glioma tissues and played an important role in cell proliferation, cycle, migration, invasion and angiogenesis. In addition, vascular endothelial growth factor (VEGFA) may be the major target genes in the downstream of lncRNA-LINC01116. Dual luciferase assay showed that LINC01116 and VEGFA both contained a miR-31-5p binding site, and LINC01116 could regulate the expression of VEGFA through competitive absorption of miR-31-5p. RNA immunoprecipitation indicated that LINC01116 and VEGFA were present in the miR-31-5p-RISC complex, and biotinylated miR-31-5p pull-down assay suggested that there was a competitive relationship between LINC01116 and VEGFA to bind with miR-31-5p. Collectively, our study has identified a novel lncRNA-LINC01116 and clarified the role and mechanism of LINC01116 in the tumorigenesis of glioma. LINC01116 may prove to be a potential target for the clinical diagnosis and treatment of glioma.
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http://dx.doi.org/10.1002/ijc.32483DOI Listing
January 2020

[Value of CT Angiography Using Low Tube Voltage and Low Contrast Combined with Iterative Model Reconstruction in Patients with Coronary Artery Bypass Grafts].

Zhongguo Yi Xue Ke Xue Yuan Xue Bao 2018 Dec;40(6):744-749

Department of Radiology,Chinese PLA General Hospital,Beijing 100853,China.

Objective To assess the value of CT angiography using low-voltage and low-concentration contrast media (CM) combined with knowledge-based iterative model reconstruction (IMR) in patients with coronary artery bypass grafts (CABG).Methods Totally 71 patients after CABG undergoing CT angiography in our center from June to November 2016 were prospectively enrolled and randomly assigned into groups A and B. The scan protocol for group A was 80 kVp with 300 mgI/ml contrast at an injection rate of 4 ml/s;images were reconstructed by IMR algorithm. The scan protocol for group B was 100 kVp with 370 mgI/ml contrast at an injection rate of 5 ml/s;images were reconstructed by hybrid iterative reconstruction technique. Aorta,left ventricular,and grafts were chosen as regions of interest. The image quality,radiation dose,and contrast load were compared between two groups.Results The signal to noise ratio (SNR) and contrast to noise ratio (CNR) of the ascending aorta,descending aorta,left ventricular,and venous bridge in group A [SNR:19±5,20±5.7,19.1±4.9,and 37±34;CNR:17±4.7,18±5,16±5.4,and 34±32] were significantly higher than those in group B [SNR:16±6 (P=0.012),15.6±5.5 (P=0.002),15±6 (P=0.002),24±8.3 (P=0.035);CNR:14±5.5 (P=0.010),13.8±5(P=0.002),13±5.7 (P=0.014),21±7.8 (P=0.031)],except for left internal mammary artery graft (LIMA),which was not inferior to that in group B. An effective radiation dose reduction of 49% was achieved in group A [(2.3±0.4) mSv,compared with group B (4.5±0.5) mSv (P=0.000)]. The iodine load of group A was (20±1.4) g compared with (29±1.6) g in group B,resulting in a reduction of 31% (P=0.000).Conclusions The low tube voltage (80 kVp) and low contrast protocol combined with IMR in patients with CABG can reduce radiation dose and improve image quality of aorta,left ventricular and venous graft. The image quality of LIMA graft in low dose group is not inferior to that in regular dose group.
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http://dx.doi.org/10.3881/j.issn.1000-503X.10309DOI Listing
December 2018

Gut microbiota dysbiosis worsens the severity of acute pancreatitis in patients and mice.

J Gastroenterol 2019 Apr 5;54(4):347-358. Epub 2018 Dec 5.

Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, 17 Yong Waizheng Street, Donghu District, Nanchang, 330006, Jiangxi, China.

Background: The gut is implicated in the pathogenesis of acute pancreatitis (AP) and the infectious complications of AP are commonly associated with enteric bacteria, yet whether gut microbiota dysbiosis participants in AP severity remains largely unknown.

Methods: We collected clinical information and fecal samples from 165 adult participants, including 41 with mild AP (MAP), 59 with moderately severe AP (MSAP), 30 with severe AP (SAP) and 35 healthy controls (HC). The serum inflammatory cytokines and gut barrier indexes were detected. Male C57BL/6 mice with AP were established and injuries of pancreas were evaluated in antibiotic-treated mice, germ-free mice as well as those transplanted with fecal microbiota. The gut microbiota was analyzed by 16S rRNA gene sequencing.

Results: The structure of gut microbiota was significantly different between AP and HC, and the disturbed microbiota was closely correlated with systematic inflammation and gut barrier dysfunction. Notably, the microbial composition changed further with the worsening of AP and the abundance of beneficial bacteria such as Blautia was decreased in SAP compared with MAP and MSAP. The increased capacity for the inferred pathway, bacterial invasion of epithelial cells in AP, highly correlated with the abundance of Escherichia-Shigella. Furthermore, the antibiotic-treated mice and germ-free mice exhibited alleviated pancreatic injury after AP induction and subsequent fecal microbiota transplantation in turn exacerbated the disease.

Conclusions: This study identifies the gut microbiota as an important mediator during AP and its dysbiosis is associated with AP severity, which suggests its role as potential therapeutic target.
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http://dx.doi.org/10.1007/s00535-018-1529-0DOI Listing
April 2019

The relationship between serum hepatitis B virus DNA level and liver histology in patients with chronic HBV infection.

PLoS One 2018 7;13(11):e0206060. Epub 2018 Nov 7.

Department of Gastroenterology, The Second Affiliated Hospital of Hainan Medical University, Haikou, Hainan Province, China.

Background: There is no consensus regarding the relationship between HBV DNA and liver fibrosis, and the relationship between HBV DNA and the degree of liver cirrhosis has not been reported in patients with chronic HBV infection.

Methods: From January 2011 to December 2016, liver biopsies were performed on 396 patients with chronic hepatitis B and cirrhosis. Assessments of liver fibrosis and cirrhosis were based on the Laennec staging system.

Results: Serum levels of HBV DNA were correlated with fibrosis and cirrhosis (KW = 73.946, P<0.001). Serum HBV DNA level was correlated with mild fibrosis, moderate to severe fibrosis and cirrhosis (P = 0.009, P<0.001, and P<0.001, respectively). The HBeAg-positive group and HBeAg-negative group showed significant differences in HBV DNA levels, and the rates of mild fibrosis, severe fibrosis and cirrhosis were significantly different between these two groups (F = 17.585, P<0.001 and F = 6.017, P = 0.003, respectively). The replication status of the serum HBV DNA affected fibrosis formation as well as cirrhosis (χ2 = 53.76, P<0.001). In the HBeAg-positive group, the sensitivity, specificity and AUC values of HBV DNA as a predictor for mild fibrosis and cirrhosis were 64.3%, 78.94% and 0.818, respectively, and 81.0%, 69.2%, and 0.871, respectively. In the HBeAg-negative group, the sensitivity, specificity and AUC values of HBV DNA for liver sclerosis prediction were 48%, 76.8% and 0.697, respectively.

Conclusions: Different HBV DNA levels had different effects on the formation of fibrosis and sclerosis in liver tissues. HBV DNA levels can predict mild fibrosis and cirrhosis in liver tissue, which is enhanced in HBeAg-positive patients.
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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0206060PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6221304PMC
April 2019

The dose response of sufentanil as an adjuvant to ropivacaine in cesarean section for relief from somato-visceral pain under epidural anesthesia in parturients with scarred uterus.

Medicine (Baltimore) 2018 Sep;97(38):e12404

Department of Anaesthesiology, Third affiliated hospital of Anhui Medical University.

Visceral pain is common during epidural anesthesia with mini dose local anesthetics in parturients during cesarean section. To reduce or avoid this complication caused by traction on the abdominal viscera, this study aimed to determine the 50% effective dose (ED50) and 95% effective dose (ED95) of epidural sufentanil as an adjuvant combination with local anesthetics for relief visceral pain in parturients with scarred uterus undergoing elective cesarean section.One hundred parturients with scarred uterus undergoing elective cesarean section under epidural anesthesia were enrolled in this randomized, double-blinded, dose-ranging study. Parturients received 5, 10, 15, 20, and 25 μg epidural sufentanil as an adjuvant with 10 mL of 0.65% ropivacaine. Successful epidural anesthesia was defined as a sixth thoracic vertebra (T6) sensory level achieved within 20 minutes after epidural drugs administration and/or no visceral pain by traction on the abdominal viscera during the cesarean section. The ED50 and ED95 were calculated with a logistic regression model.ED50 and ED95 of epidural sufentanil for successful of the pain-free from visceral pain were 10.7 μg [95% confidence interval (CI): 2.4-14.4 μg) and 28.1 μg (95% CI: 19.4-44.0 μg), respectively. The onset time to sensory block, maximum Bromage scale and duration of motor block were significant different with dose of sufentanil >20 μg (P < .05, compared with the other dose groups). With the dose of epidural sufentanil >20 μg could result in an increase of incidence of maternals' adverse effects. Compared with a different dose of sufentanil, epidural administed sufentanil between 15 μg and 20 μg can maximize parturients' satisfaction.Our study showed that sufentanil could be used in combination with ropivacaine for relief from somato-visceral pain in patients with scarred uterus during elective cesarean section during epidural anesthesia, and that maximized parturients' satisfaction could be achieved when the use of sufentanil with the dose between 15 μg and 20 μg for epidural anesthesia.
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http://dx.doi.org/10.1097/MD.0000000000012404DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6160163PMC
September 2018

Therapeutic efficacy of hydrogen‑rich saline alone and in combination with PI3K inhibitor in non‑small cell lung cancer.

Mol Med Rep 2018 Aug 14;18(2):2182-2190. Epub 2018 Jun 14.

Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China.

The aim of the present study was to investigate the effects of combination therapy of LY294002, a specific inhibitor of phosphatidylinositol 3‑kinase (PI3K), with hydrogen‑rich saline on the proliferation and apoptosis of the non‑small cell lung cancer (NSCLC) A549 cell line and the mechanisms underpinning this. Excessive production of reactive oxygen species (ROS) may induce DNA mutations, DNA damage, genomic instability and cell proliferation, and ROS are involved in several types of cancer, particularly lung cancer. In a previous study, hydrogen was recognized as an antioxidant in preventive and therapeutic applications. The PI3K/protein kinase B (Akt) pathway is an important signaling pathway that may activate downstream of a series of extracellular signals and impact on cellular processes including cell proliferation, apoptosis and survival. To date, the PI3K/Akt signaling pathway has been indicated as a feasible target for novel antineoplastic drugs. Different strategies combining the two treatment modalities have been used in cancer therapy in order to achieve an improved therapeutic response and longer control of tumor modalities control. The present study investigated the effect of hydrogen‑rich saline alone and in combination with the PI3K inhibitor, LY294002, on the proliferation, oxidative stress and apoptosis of NSCLC A549 cells. This combination therapy may be more effective than separate drug treatment; it decreased the malondialdehyde level and increased the superoxide dismutase activity. The combination therapy also enhanced the efficacy of anti‑proliferation and apoptosis. Similarly, the results of the present study demonstrated that administration of the two agents in combination may inhibit phospho‑Akt activity, and reduce expression of heme oxygenase‑1 and nuclear factor‑κB p65. The results further suggested that the combination therapy may reduce cell proliferation and promote cell apoptosis by downregulating Akt phosphorylation and inhibiting the PI3K pathway in NSCLC cell lines. Therefore, the present study provided evidence that combined therapy may be a novel therapeutic option for patients with NSCLC.
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http://dx.doi.org/10.3892/mmr.2018.9168DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6072234PMC
August 2018

[ADS-J1 antagonizes semen-derived enhancer of virus infection-mediated enhancement of transmitted founder HIV-1 and its matched chronic control strain infection].

Nan Fang Yi Ke Da Xue Xue Bao 2018 Feb;38(2):211-216

School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China. E-mail:

Objective: To investigate the effect of semen-derived enhancer of virus infection (SEVI) on the infection of transmitted/founder (TF) HIV-1 and its matched chronic control (CC) viruses and the antagonism of ADS-J1 on SEVI-mediated enhancement of TF and CC virus infection in vitro.

Methods: PAP self-assembling into SEVI amyloid fibrils was validated by ThT assay. We generated the virus stocks of TF and CC virus pair. TZM-bl cells were infected with the mixture of SEVI and TF or CC viruses for 72 h. Luciferase activity was used to observe the enhancement of SEVI. SEVI was treated with different concentrations of ADS-J1 and incubated with TF or CC viruses. TZM-bl cells were then infected with the mixture and luciferase activity was detected 72 h after infection to analyze the antagonism of ADS-J1 on the enhancing effect of SEVI. ADS-J1 was also incubated with TF and CC viruses directly and TZM-bl cells were infected for 72 h to evaluate the antiviral effect using luciferase assay. SEVI was treated with ADS-J1 and Zeta potential was determined to explore the antagonistic mechanism of ADS-J1.

Results: ThT assay showed that PAP was capable of self-assembly into SEVI amyloid fibrils. SEVI significantly accelerated TF and CC viruses infection (P<0.05), and ADS-J1 not only significantly antagonized the enhancement of SEVI (P<0.05) but also directly inhibited the infection of TF and CC viruses (P<0.05). ADS-J1 neutralized the positive charge of SEVI in a dose-dependent manner.

Conclusions: SEVI promotes the infection of TF and CC strains, and ADS-J1 antagonizes SEVI-mediated enhancement of TF and CC viruses by neutralizing the positive charge of SEVI.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6743876PMC
February 2018

Modulation of UVB-induced Carcinogenesis by Activation of Alternative DNA Repair Pathways.

Sci Rep 2018 01 15;8(1):705. Epub 2018 Jan 15.

Oregon Institute of Occupational Health Sciences, Oregon Health & Science University, 3181 S. W. Sam Jackson Park Rd, Portland, Oregon, 97239, USA.

The molecular basis for ultraviolet (UV) light-induced nonmelanoma and melanoma skin cancers centers on cumulative genomic instability caused by inefficient DNA repair of dipyrimidine photoproducts. Inefficient DNA repair and subsequent translesion replication past these DNA lesions generate distinct molecular signatures of tandem CC to TT and C to T transitions at dipyrimidine sites. Since previous efforts to develop experimental strategies to enhance the repair capacity of basal keratinocytes have been limited, we have engineered the N-terminally truncated form (Δ228) UV endonuclease (UVDE) from Schizosaccharomyces pombe to include a TAT cell-penetrating peptide sequence with or without a nuclear localization signal (NLS): UVDE-TAT and UVDE-NLS-TAT. Further, a NLS was engineered onto a pyrimidine dimer glycosylase from Paramecium bursaria chlorella virus-1 (cv-pdg-NLS). Purified enzymes were encapsulated into liposomes and topically delivered to the dorsal surface of SKH1 hairless mice in a UVB-induced carcinogenesis study. Total tumor burden was significantly reduced in mice receiving either UVDE-TAT or UVDE-NLS-TAT versus control empty liposomes and time to death was significantly reduced with the UVDE-NLS-TAT. These data suggest that efficient delivery of exogenous enzymes for the initiation of repair of UVB-induced DNA damage may protect from UVB induction of squamous and basal cell carcinomas.
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http://dx.doi.org/10.1038/s41598-017-17940-8DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5768739PMC
January 2018

Profiling of volatile fragrant components in a mini-core collection of mango germplasms from seven countries.

PLoS One 2017 6;12(12):e0187487. Epub 2017 Dec 6.

Key Laboratory of Tropical Fruit Biology of Ministry of Agriculture, South Subtropical Crops Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, China.

Aroma is important in assessing the quality of fresh fruit and their processed products, and could provide good indicators for the development of local cultivars in the mango industry. In this study, the volatile diversity of 25 mango cultivars from China, America, Thailand, India, Cuba, Indonesia, and the Philippines was investigated. The volatile compositions, their relative contents, and the intervarietal differences were detected with headspace solid phase microextraction tandem gas chromatography-mass spectrometer methods. The similarities were also evaluated with a cluster analysis and correlation analysis of the volatiles. The differences in mango volatiles in different districts are also discussed. Our results show significant differences in the volatile compositions and their relative contents among the individual cultivars and regions. In total, 127 volatiles were found in all the cultivars, belonging to various chemical classes. The highest and lowest qualitative abundances of volatiles were detected in 'Zihua' and 'Mallika' cultivars, respectively. Based on the cumulative occurrence of members of the classes of volatiles, the cultivars were grouped into monoterpenes (16 cultivars), proportion and balanced (eight cultivars), and nonterpene groups (one cultivars). Terpene hydrocarbons were the major volatiles in these cultivars, with terpinolene, 3-carene, caryophyllene and α-Pinene the dominant components depending on the cultivars. Monoterpenes, some of the primary volatile components, were the most abundant aroma compounds, whereas aldehydes were the least abundant in the mango pulp. β-Myrcene, a major terpene, accounted for 58.93% of the total flavor volatile compounds in 'Xiaofei' (Philippens). γ-Octanoic lactone was the only ester in the total flavor volatile compounds, with its highest concentration in 'Guiya' (China). Hexamethyl cyclotrisiloxane was the most abundant volatile compound in 'Magovar' (India), accounting for 46.66% of the total flavor volatiles. A typical aldehydic aroma 2,6-di-tert-butyl-4-sec-butylphenol, was detected in 'Gleck'. A highly significant positive correlation was detected between Alc and K, Alk and Nt, O and L. Cultivars originating from America, Thailand, Cuba, India, Indonesia and the Philippines were more similar to each other than to those from China. This study provides a high-value dataset for use in development of health care products, diversified mango breeding, and local extension of mango cultivars.
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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0187487PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5718421PMC
January 2018

Knockdown of SALL4 expression using RNA interference induces cell cycle arrest, enhances early apoptosis, inhibits invasion and increases chemosensitivity to temozolomide in U251 glioma cells.

Oncol Lett 2017 Oct 4;14(4):4263-4269. Epub 2017 Aug 4.

Department of Neurosurgery, Changzheng Hospital, Second Military Medical University, Shanghai 200003, P.R. China.

Spalt-like transcription factor 4 (SALL4) is essential for the maintenance of the self-renewal and pluripotent properties in embryonic stem cells. Although the detailed mechanism remains unclear, dysregulation of SALL4 has been detected in various malignancies. Previously, the authors' of the present study reported that the expression level of SALL4 was associated with the poor prognosis of glioblastoma multiforme (GBM). The present study aimed to investigate the function of SALL4 in U251 human glioblastoma cells, including apoptosis and invasion inhibition. It was revealed that knockdown of SALL4 expression through RNA interference induced cell cycle arrest, enhanced early apoptosis and significantly inhibited invasion. Furthermore, downregulation of SALL4 was associated with a significantly lower expression level of the core transcription factors, including POU class 5 homeobox 1, SRY-box 2 and Nanog homeobox. In addition, inhibition of SALL4 significantly reduced the concentration of chemotherapeutic agent temozolomide required to inhibit cell growth by 50%, which decreased from 113.66±23.07 and 114.93±20.91 µg/ml to 68.34±3.52 and 67.44±4.71 µg/ml in two independent short interfering RNA transfected groups. These results indicate that SALL4 serves an important role in the GBM pathophysiology and targeting SALL4 may be a potential approach to the treatment of GBM.
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http://dx.doi.org/10.3892/ol.2017.6722DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5592883PMC
October 2017

prevents kidney damage through inhibiting expression of inflammatory factors in the glomerulus in streptozocin-induced diabetic rats.

Iran J Basic Med Sci 2017 Jun;20(6):715-721

Runliang Diabetes Laboratory, Diabetes Research Center, Ningbo University. Ningbo, Zhejiang, PR China.

Objectives: It has been widely reported that (MCE) is used for the treatment of diabetes mellitus in traditional medicine. The present study was designed to investigate its mechanism of action in the treatment of diabetic nephropathy (DN). We assessed whether MCE preventive treatment ameliorates kidney damage in high-fat diet and streptozotocin (STZ)-induced type 2 diabetic rats.

Materials And Methods: Rats were fed a high-fat diet and injected with STZ. MCE was given to rats daily at 10 g/kg. Fasting blood glucose (FBG) and postprandial plasma glucose were measured. Blood and urine biochemical parameters, renal tissue morphology, and inflammation were investigated.

Results: Prevention with MCE significantly decreased FBG and homoeostasis model assessment (HOMA) of IR (HOMA-IR) levels and increased insulin levels in diabetic rats. MCE prevention significantly decreased levels of KW/BW, BUN, Cr, and 24 hr urinary protein. MCE inhibited glomerular basement membrane thickening, tubular epithelial cell hypertrophy, and glomerular capillary dilation. MCE also prevented the disappearance of bowman's space and renal tubular lumen and decreased collagen deposition in rat kidney. Moreover, MCE reduced the levels of inflammatory factors (MCP-1 and TNF-α) and fibrosis factors (collagen IV and fibronectin).

Conclusion: MCE prevents DN through inhibition of inflammation and fibrosis in a rat model. It might provide a safe and effective way to prevent DN.
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http://dx.doi.org/10.22038/IJBMS.2017.8842DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5569450PMC
June 2017

MicroRNA expression profiles in chronic epilepsy rats and neuroprotection from seizures by targeting miR-344a.

Neuropsychiatr Dis Treat 2017 31;13:2037-2044. Epub 2017 Jul 31.

Department of Neurology, First Affiliated Hospital of Guangxi Medical University.

MicroRNA (miRNA) is believed to play a crucial role in the cause and treatment of epilepsy by controlling gene expression. However, it is still unclear how miRNA profiles change after multiple prolonged seizures and aggravation of brain injury in chronic epilepsy (CE). To investigate the role of miRNA in epilepsy, we utilized the CE rat models with pentylenetetrazol (PTZ) and miRNA profiles in the hippocampus. miRNA profiles were characterized using miRNA microarray analysis and were compared with the rats in the sham group, which received 0.9% physiological saline treatment at the same dose. Four up-regulated miRNAs (miR-139-3p, -770-5p, -127-5p, -331-3p) and 5 down-regulated miRNAs (miR-802-5p, -380-5p, -183-5p, -547-5p, -344a/-344a-5p) were found in the CE rats (fold change >1.5, <0.05). Three of the dysregulated miRNAs were validated by quantitative real-time polymerase chain reaction, which revealed an outcome consistent with the initial results of the miRNA microarray analyses. Then, miR-344a agomir was intracerebroventricularly injected and followed by PTZ induction of CE models to investigate the effect of miR-344a in chronic neocortical epileptogenesis. After miRNA-344a agomir and scramble treatment, results showed a restoration of seizure behavior and a reduction in neuron damage in the cortex in miRNA-334a agomir treated rats. These data suggest that miRNA-344a might have a small modulatory effect on seizure-induced apoptosis signaling pathways in the cortex.
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http://dx.doi.org/10.2147/NDT.S141062DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5546815PMC
July 2017

The role of microglia in multiple sclerosis.

Neuropsychiatr Dis Treat 2017 26;13:1661-1667. Epub 2017 Jun 26.

Department of Neurology, The First Affiliated Hospital of Guangxi Medical University.

Multiple sclerosis (MS) is an autoimmune disease of the central nervous system (CNS). Microglia are the resident innate immune cells in the CNS; they play an important role in the processes of demyelination and remyelination in MS. Microglia can function as antigen-presenting cells and phagocytes. In the past, microglia were considered to be the same cell type as macrophages, and researchers have different opinions about the role of microglia in MS. This review focuses on the original classification of microglia and their role in the pathogenesis of MS. Moreover, we present a hypothetical model for the role of microglia in the pathogenesis of MS based on recent findings.
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http://dx.doi.org/10.2147/NDT.S140634DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5499932PMC
June 2017

Characterization of cyclophilin D in freshwater pearl mussel ().

Zool Res 2017 Mar;38(2):103-109

School of Life Sciences, Nanchang University, Nanchang Jiangxi 330031, China; Key Laboratory of Aquatic Animals Resources and Utilization of Jiangxi, Nanchang University, Nanchang Jiangxi 330031, China.

Cyclophilin D (referred to as ) was obtained from the freshwater pearl mussel (). The full-length cDNA was 2 671 bp, encoding a protein consisting of 367 amino acids. HsCypD was determined to be a hydrophilic intracellular protein with 10 phosphorylation sites and four tetratricopeptide repeat (TPR) domains, but no signal peptide. The core sequence region YKGCIFHRIIKDFMVQGG is highly conserved in vertebrates and invertebrates. Phylogenetic tree analysis indicated that CypD from all species had a common origin, and HsCypD had the closest phylogenetic relationship with CypD from Lottia gigantea. The constitutive mRNA expression levels of exhibited tissue-specific patterns, with the highest level detected in the intestines, followed by the gonads, and the lowest expression found in the hemocytes.
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http://dx.doi.org/10.24272/j.issn.2095-8137.2017.018DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5396027PMC
March 2017

Differential Expression of Circular RNAs in Glioblastoma Multiforme and Its Correlation with Prognosis.

Transl Oncol 2017 Apr 23;10(2):271-279. Epub 2017 Feb 23.

Department of Neurosurgery, Changzheng Hospital, Second Military Medical University, 415 Fengyang Road, Shanghai 200003, China. Electronic address:

Objective: The present study aimed to explore the expression profiles of circular RNAs (circRNAs) in glioblastoma multiforme (GBM) in an attempt to identify potential core genes in the pathogenesis of this tumor.

Methods: Differentially expressed circRNAs were screened between tumor tissues from five GBM patients and five normal brain samples using Illumina Hiseq. Bioinformatics analysis was used to analyze their potential function. CircBRAF was further detected in different WHO grades glioma tissues and normal brain tissues. Kaplan-Meier curves and multivariate Cox's analysis were used to analyze the association between circBRAF expression level and prognosis of glioma patients.

Results: A total of 1411 differentially expressed circRNAs were identified in GBM patients including 206 upregulated circRNAs and 1205 downregulated circRNAs. Differential expression of circRNAs was closely associated with the biological process and molecular function. The downregulated circRNAs were mainly associated with ErbB and Neurotrophin signaling pathways. Moreover, the expression level of circBRAF in normal brain tissues was significantly higher than that in glioma tissues (P<.001). CircBRAF was significantly lower in glioma patients with high pathological grade (WHO III & IV) than those with low grade (WHO I & II) (P<.001). Cox analysis revealed that high circBRAF expression was an independent biomarker for predicting good progression-free survival and overall survival in glioma patients (HR=0.413, 95% CI 0.201-0.849; HR=0.299, 95% CI 0.135-0.661; respectively).

Conclusion: The present study identified a profile of dysregulated circRNAs in GBM. Bioinformatics analysis showed that dysregulated circRNAs might be associated with tumorigenesis and development of GBM. In addition, circBRAF could severe as a biomarker for predicting pathological grade and prognosis in glioma patients.
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http://dx.doi.org/10.1016/j.tranon.2016.12.006DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5328755PMC
April 2017