Publications by authors named "Wei-Wei Meng"

20 Publications

  • Page 1 of 1

Complete mitochondrial genome of the edible Basidiomycete mushroom (Aphyllophorales: Thelephoraceae) from China.

Mitochondrial DNA B Resour 2021 Feb 20;6(2):606-607. Epub 2021 Feb 20.

Gardening and Horticulture Department, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, China.

The complete mitochondrial genome of , an edible Basidiomycete mushroom species with ecological and economic value is reported in this study. The whole genome is a circular molecule 50,672 bp in length and encodes 42 genes as follows: 15 protein-coding genes, two rRNA genes and 25 tRNA genes. The A, T, C, G contents in the genome are 35.60%, 35.31%, 13.89%, and 15.20%, respectively. Phylogenetic analysis revealed a close relationship between and . This is the first complete mitochondrial genome for that will be useful for providing basic genetic information for this important species.
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http://dx.doi.org/10.1080/23802359.2020.1869620DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7899663PMC
February 2021

The complete chloroplast genome sequence of the threatened (Orchidaceae).

Mitochondrial DNA B Resour 2019 Nov 22;4(2):4220-4222. Epub 2019 Nov 22.

Institute of Floriculture, Liaoning Academy of Agricultural Sciences, Shenyang, China.

The complete chloroplast genome of , a rare species in the family Orchidaceae was reported in this study. The genome size is 175,122 bp in length, and contains four sub-regions: 97,486 bp of large single copy (LSC) and 22,260 bp of small copy (SSC) regions, separated by 27,688 bp of inverted repeat (IR) regions. A total of 133 genes were annotated, including 87 protein-coding genes, 38 tRNA genes and 8 rRNA genes. The GC content of this cp genome is 34.36%. Phylogenetic analysis revealed a close relationship between with and . This is the first complete cp genome for that would be useful for conservation and phylogenetic studies of this species.
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http://dx.doi.org/10.1080/23802359.2019.1693933DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7707734PMC
November 2019

[Research advances in iron and zinc transfer from soil to plant in intercropping systems].

Ying Yong Sheng Tai Xue Bao 2015 Apr;26(4):1263-70

Intercropping facilitates the efficient utilization of land, light, water and nutrients. It is, therefore, important to increase the biodiversity of farmland and to develop sustainable ecological agriculture in both theory and practice. Intercropping helps improve the mobilization and uptake of soil iron (Fe) and zinc (Zn) and corresponding nutritional status in the plants, thus achieving grain micronutrient biofortification. In this review, phenomena of the improvement of Fe and Zn nutrition in dicotyledonous plants as affected by intercropping with gramineous plants (e.g. maize/peanut intercropping) were summarized. Moreover, the possible mechanisms in relation to interspecific rhizosphere molecular and physiological processes, as well as the changes in interspecific root morphology and distribution and microorganisms in the rhizosphere were elucidated. The accumulation, transfer and distribution of Fe and Zn in the plants in intercropping systems were also reviewed. The possible affecting factors on nutrients of Fe and Zn were analyzed. Based on the present advances in the mobilization and acquisition of soil Fe and Zn, and their accumulation and distribution in plants as well as the related management and environment influence factors, some new research questions were pointed out. Quantitative analysis, dynamic and systemic researches and field studies on Fe and Zn transfer from soil to plant in intercropping systems should be strengthened in the future.
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April 2015

Expression of circulating microRNA-20a and let-7a in esophageal squamous cell carcinoma.

World J Gastroenterol 2015 Apr;21(15):4660-5

Fu-Cheng He, Wei-Wei Meng, Yun-Hui Qu, Pin Lv, Liang Ming, Department of Medical Laboratory, The First Affiliated Hospital, Zhengzhou University, Zhengzhou 450052, Henan Province, China.

Aim: To investigate the expressions of microRNA-20a (miR-20a) and let-7a in esophageal squamous cell carcinoma (ESCC) and their diagnostic value.

Methods: Seventy patients with ESCC and 40 healthy subjects were enrolled to investigate the expression of miR-20a and let-7a using quantitative real-time PCR. The expression of miR-20a and let-7a was compared between ESCC patients and healthy subjects. The plasma levels of miR-20a and let-7a in relation to patient clinicopathologic parameters, the receiver operating characteristic (ROC) curve, and the sensitivity and specificity of miR-20a and let-7a in ESCC diagnosis were analyzed.

Results: Plasma levels of miR-20a were significantly higher in ESCC patients than in healthy controls, and plasma levels of let-7 were lower in ESCC patients than in healthy controls (both P < 0.05). The area under the ROC curve of miR-20a was 0.767 (95%CI: 0.677-0.857; P < 0.001), when the cut-off value was set at 4.77, the sensitivity and specificity were 64.3% and 75.0%, respectively. The area under the ROC curve of let-7a was 0.829 (95%CI: 0.754-0.904; P < 0.001), when the cut-off value was set at 6.22, the sensitivity and specificity were 74.3% and 85.0%, respectively. Thus, the sensitivity and specificity of let-7a were higher than those of miR-20a. The median relative plasma expression of let-7a in clinical stage III/IV (0.24) was lower than that in stage I/II (0.42), while the expression of miR-20a according to stage was not statistically different. The expressions of miR-20a and let-7a were not related to gender, age, tumor diameter, tumor grade, or pathologic stage.

Conclusion: Plasma miR-20a and let-7a levels are significantly altered in patients with ESCC and can be used as potential biomarkers in the diagnosis of ESCC.
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http://dx.doi.org/10.3748/wjg.v21.i15.4660DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4402314PMC
April 2015

C-21 steroidal glycosides from Dregea sinensis.

J Asian Nat Prod Res 2014 23;16(8):836-40. Epub 2014 Jun 23.

a School of Life Science, Beijing Institute of Technology , Beijing 100081 , China.

Two new C-21 steroidal glycosides, dregeosides D (1) and E (2), were isolated from the roots of Dregea sinensis. The structures of the isolated compounds were elucidated on the basis of 1D and 2D NMR spectra and HR-ESI-MS analysis. Finally, the inhibited effects of the isolated compounds on interleukin 2 receptor were evaluated by enzyme-linked immunosorbent assay.
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http://dx.doi.org/10.1080/10286020.2014.921910DOI Listing
October 2014

[Community structure of Great Gerbils (Rhombomys opimus) parasitic fleas in Junggar Basin focus and related epizootiological characteristics on plague].

Zhonghua Liu Xing Bing Xue Za Zhi 2013 Nov;34(11):1096-100

Xinjiang Uygur Autonomous Regional Center for Disease Control and Prevention, Urumqi 830002, China. Email:

Objective: To understand the community structure of Rhombomys opimus parasitic fleas in the natural plague focus in Junggar Basin, so as to explain the relationship between the community structure and the prevalence of animal plague in this area.

Methods: The body fleas of R.opimus which were collected in 2005-2010 from the Junggar Basin was analysed by community ecology method, an each clustered flea community was compared with information of pathogenic and serological indicators of animal plague epidemic by statistic method.

Results: The community structure of R. opimus parasitic fleas included 19 species and was very complicated, with only 3 were identified as 'common' species but the others belonged to 'rare' species. Both the average richness and diversity of flea community were higher, as 1.66 and 1.5556, with dominance not obvious (0.332) and the homogeneity as moderate (0.5283). The community structure of R. opimus parasitic fleas could be changed by the following factors as: the rates of flea parasitic/flea index and the proportions of main fleas etc. The flea community could be divided into 5 clusters according to the above said elements. All these data showed that the fleas of R. opimus parasitic fleas possess the nature of multi-parasitism.

Conclusions: The community of R. opimus parasitic fleas existed heterogeneous of geographic region, and this phenomenon associated with the animal plague epidemic strength.
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November 2013

Dragon's blood dropping pills have protective effects on focal cerebral ischemia rats model.

Phytomedicine 2013 Dec 17;21(1):68-74. Epub 2013 Sep 17.

School of Life Science, Beijing Institute of Technology, Beijing 100081, PR China.

Dragon's blood is a bright red resin obtained from Dracaena cochinchinensis (Lour.) S.C.Chen (Yunnan, China). As a traditional Chinese medicinal herb, it has great traditional medicinal value and is used for wound healing and to stop bleeding. Its main biological activity comes from phenolic compounds. In this study, phenolic compounds were made into dropping pills and their protective effects were examined by establishing focal cerebral ischemia rats model used method of Middle Cerebral Artery Occlusion (MCAO), and by investigating indexes of neurological scores, infarct volume, cerebral index, cerebral water content and oxidation stress. Compared to model group, high, middle and low groups of Dragon's blood dropping pills could improve the neurological function significantly (p<0.01) and reduce cerebral infarct volume of focal cerebral ischemia rats remarkably (p<0.05-0.01). Meanwhile, each group could alleviate cerebral water content and cerebral index (p<0.05-0.01) and regulate oxidative stress of focal cerebral ischemia rats obviously (p<0.05-0.01). Activities of middle group corresponded with that treated with positive control drug. The results obtained here showed that Dragon's blood dropping pills had protective effects on focal cerebral ischemia rats.
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http://dx.doi.org/10.1016/j.phymed.2013.08.007DOI Listing
December 2013

Dragon's blood may have radioprotective effects in radiation-induced rat brain injury.

Radiat Res 2012 Jul 11;178(1):75-85. Epub 2012 Jun 11.

School of Life Science, Beijing Institute of Technology, Beijing 100081, PR China.

Dragon's blood is a bright red resin obtained from Dracaena cochinchinensis. It is a traditional medicinal that is used for wound healing and to stop bleeding. Its main biological activity appears to be from phenolic compounds found in Dragon's blood. In this study, the radioprotective effects of Dragon's blood were examined after whole brain irradiation of rats with either 100 MeV/u Carbon (12)C(6+) heavy ions or (60)Co γ-rays. The amounts of radiation-induced oxidative stress, inflammatory cytokines and apoptosis in irradiated rat brains were compared with and without Dragon's blood treatment. Compared to the "irradiation only" control group, the Dragon's blood treatment group significantly decreased malondialdehyde and hydrogen peroxide levels, and increased superoxide dismutase activity and glutathione levels induced by oxidative stress in radiation exposed rats (P < 0.05). Dragon's blood also significantly reduced radiation-induced inflammatory cytokines of tumor necrosis factor-α, interferon-γ and interleukin-6 levels (P < 0.05) and inhibited hippocampal neuronal apoptosis in (60)Co γ-ray irradiated rats. Furthermore, Dragon's blood significantly increased expression of brain-derived neurophic factor and inhibited the expression of pro-apoptotic caspase 3 (P < 0.05-0.01). Finally, Dragon's blood significantly inhibited expression of the AP-1 transcription factor family members c-fos and c-jun proteins (P < 0.05-0.01). The results obtained here suggest that Dragon's blood has radioprotective properties in rat brains after both heavy ions and (60)Co γ-ray exposure.
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http://dx.doi.org/10.1667/rr2739.1DOI Listing
July 2012

[Effects of irrigation on the water soluble carbohydrate contents in different wheat cultivars stem and sheath and the grain yield].

Ying Yong Sheng Tai Xue Bao 2011 Oct;22(10):2487-94

Ministry of Agriculture Key Laboratory of Crop Ecophysiology and Cultivation, Shandong Agricultural University, Tai' an 271018, Shandong, China.

Taking two wheat (Triticum aestivum L.) cultivars Jimai 20 and Taishan 22 as test objects, this paper studied the effects of different irrigation treatments on the water soluble carbohydrate contents in penult stem internode and sheath and the grain yield. Four irrigation treatments were installed, i. e. , no irrigation (W0), irrigation at overwintering and jointing stages (W1), irrigation at overwintering, jointing and anthesis stages (W2), and irrigation at overwintering, jointing, anthesis and filling stages (W3). In treatment W0, the contents of total soluble sugar and of fructan with the degree of polymerization (DP) > or = 4 and = 3 in the penult stem internode and sheath of the two cultivars at early filling stage and the fructose content at later filling stage were the highest, indicating that the accumulation and degradation of water soluble carbohydrate in the penult stem internode and sheath were promoted under no irrigation, which in turn increased the 1000-grain weight. In treatment W1, the contents of fructan with DP > or = 4 and DP = 3 in the penult stem internode and sheath of Jimai 20 at early filling stage, the total soluble sugar and fructose contents at middle and later filling stages, and the grain yield were the highest. In treatment W2, Taishan 22 had the highest contents of fructan with DP > or = 4 and DP=3 in the penult stem internode and sheath at early filling stage, lower fructose content at higher filling stage than in treatment W1, and the highest grain yield. Comparing with Jimai 20, Taishan 22 had higher contents of total soluble sugar and of fructan with DP > or = 4 in the penult stem internode and sheath at early filling stage and higher content of fructose at later filling stage, and lower grain yield in treatments W0 and W1 but higher grain yield in treatments W2 and W3. In this study, treatments W1 and W2 promoted the accumulation and degradation of water soluble carbohydrate in the penult stem internode and sheath of Jimai 20 and Taishan 22, and gained the highest grain yields of the two cultivars, respectively, being most appropriate irrigation treatments for Jimai 20 and Taishan 22, respectively.
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October 2011

[Progress on the study of biological characteristic of Crimean-Congo hemorrhagic fever].

Zhonghua Liu Xing Bing Xue Za Zhi 2011 Jul;32(7):727-32

Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urmuqi 830046, China.

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July 2011

Dragon's Blood extract has antithrombotic properties, affecting platelet aggregation functions and anticoagulation activities.

J Ethnopharmacol 2011 May 2;135(2):510-4. Epub 2011 Apr 2.

School of Life Science, Beijing Institute of Technology (BIT), 5 South Zhongguancun Street, Haidian District, Beijing 100081, PR China.

Ethnopharmacological Relevance: Dragon's Blood from Dracaena cochinchinensis (Lour.) S.C. Chen (Yunnan, China), as a traditional Chinese medicinal herb, was shown to have certain antithrombotic effects. A new preparation process was used to extract effective components from Dragon's Blood. A 95% ethanol extract A (EA) and a precipitate B (PB) fraction were obtained and compared. Reliability of the preparation process was validated by pharmacodynamic experiments.

Materials And Methods: A rat/mouse thrombosis and blood stasis model was developed for this study, and EA and PB effects on thrombosis, platelet functions and blood coagulation activities were analyzed.

Results: It was observed that the EA fraction had significantly better inhibitory effects than the PB fraction on thrombosis (p<0.05), platelet aggregation function (p<0.01) and anticoagulation activity (p<0.05-0.01).

Conclusions: The results obtained here showed that EA fraction from Dragon's Blood contained pharmacologically effective compounds with antithrombotic effects, partially improving platelet function and anticoagulation activity.
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http://dx.doi.org/10.1016/j.jep.2011.03.063DOI Listing
May 2011

Combination of HPLC chromatogram and hypoglycemic effect identifies isoflavones as the principal active fraction of Belamcanda chinensis leaf extract in diabetes treatment.

J Chromatogr B Analyt Technol Biomed Life Sci 2011 Feb 31;879(5-6):371-8. Epub 2010 Dec 31.

School of Life Science, Beijing Institute of Technology, Beijing, PR China.

In previous study, we demonstrated the hypoglycemic effect of aqueous extract of Belamcanda chinensis leaves in rats. Here, we separated the aqueous extract of B. chinensis leaves and investigated the spectrum-effect relationships between HPLC chromatograms and hypoglycemic activities of different isolates from B. chinensis leaf extract. Sequential solvent extraction with petroleum ether, chloroform, acetic ester and n-butanol provided several isolates showing similar hypoglycemic activities, making it difficult to discriminate the active fractions. Stepwise elution through HP20 macroporous resin by water, 40% and 95% ethanol provided isolates with distinct hypoglycemic activities, representing a simple, rapid and efficient preparative separation method. Combination of HPLC chromatogram and pharmacological effect targeted a hypoglycemic activity-related region in HPLC chromatogram. Each peak in this region was analyzed by UV spectrum scan. Most of them were flavonoids in which tectoridin and swertisin were known flavonoids with anti-diabetic activities. In together, this work provides a general model of combination of HPLC chromatography and pharmacological effect to study the spectrum-effect relationships of aqueous extract from B. chinensis leaves, which can be used to find principle components of B. chinensis on pharmacological activity.
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http://dx.doi.org/10.1016/j.jchromb.2010.12.022DOI Listing
February 2011

catena-Poly[zinc(II)-μ-aqua-κO:O-bis-(μ-quinoline-4-carboxyl-ato-κO:O')].

Acta Crystallogr Sect E Struct Rep Online 2009 Jul 4;65(Pt 8):m873. Epub 2009 Jul 4.

School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, People's Republic of China.

The asymmetric unit of the title complex, [Zn(C(10)H(6)NO(2))(2)(H(2)O)](n), consists of one quinoline-4-carboxyl-ate anion, half of a Zn(2+) cation and half of a coordinated water mol-ecule. The cation and the water O atom have crystallographically imposed inversion and twofold rotation symmetry, respectively. The metal centre displays an elongated ZnO(6) octa-hedral coordination geometry provided by the O atoms of four anions at the equatorial plane and two axial water mol-ecules. Each anion and water mol-ecule act as bridges between Zn(II) cations, forming a polymeric chain parallel to [001]. The chains are further linked into a three-dimensional framework through O-H⋯N hydrogen bonds.
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http://dx.doi.org/10.1107/S1600536809025392DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2977275PMC
July 2009

Poly[tetra-kis(μ-cyclo-hexa-ne-1,4-di-carboxyl-ato)di-μ-hydroxido-penta-zinc(II)].

Acta Crystallogr Sect E Struct Rep Online 2009 Dec 4;66(Pt 1):m16-7. Epub 2009 Dec 4.

School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, People's Republic of China.

In the title coordination polymer, [Zn(5)(μ(3)-OH)(2)(1,4-CDC)(4)](n) (1,4-CDCH(2) = 1,4-cyclo-hexa-nedicarboxylic acid) or [Zn(5)(C(8)H(10)O(4))(4)(OH)(2)](n), the asymmetric unit comprises one half of an octa-hedrally coordinated ZnO(6) complex unit (site symmetry ) and two five-coordinate ZnO(5) complex units, together with two μ(3)-bridging hydroxido ligands and four 1,4-CDC ligands (comprising two whole mol-ecules and four inversion-related half-molecules). The ZnO(6) unit consists of four carboxyl-ate O donors (two bridging) and two hydroxido O donors (both bridging three Zn centres) [Zn-O range 2.065 (3)-2.125 (3) Å]. Each of the ZnO(5) units [one capped tetra-hedral, the other square-pyrimidal; Zn-O range 1.928 (3)-2.338 (3) Å] has one hydroxido O donor and four carboxyl O donors from three different 1,4-CDC carboxyl-ate O donors (one bridging). Infinite (ZnO)(n) inorganic chains run parallel to the a axis and are interconnected by the organic ligands into a three-dimensional structure.
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http://dx.doi.org/10.1107/S1600536809051666DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2980201PMC
December 2009

[Study on the situation of plague in Junggar Basin of China].

Zhonghua Liu Xing Bing Xue Za Zhi 2008 Feb;29(2):136-44

The Center for Disease Control and Prevention of Xinjiang Uygur Autonomous Region, Urumqi 830002, China.

Objective: To understand the distribution, fauna, population structure of host animals and their parasitic fleas as well as popular dynamic of animal plague of natural plague foci in Junggar Basin.

Methods: Sample materials and data of animals and vector insects were collected using ecological methods and the population structures were analyzed statistically. F1 antibody of Yersinia pestis in rodents' serum and organ suspension was detected by means of IHA while the pathogen of Y. pestis in rodents and vector insects was detected by means of aetiological detections and the isolated Y. pestis was detected using biochemical methods.

Results: The small mammals which were found in Junggar Basin belonged to 17 species of 11 genera 7 families. Of them, 13 species of rodents were included whose parasitic fleas belonged to 19 species of 10 genera 8 families. The average coverage of Rhombomys opimus hole-community was 22.5% in Junggar Basin with the average density of R. opimus hole-community was 15.9/hm2 and the average rate of habitat of the hole-community was 70.2%. In the R. opimus community, the average density of rodents was 3.1/hole-community, and 34.4/hm2 in the nature plague foci. In the population structure of the hole-community of R. opimus, R. opimus accounted for 72.9% in the total captured rodents, Meriones meridianus was 24.5% while the others were 2.6%. In the nocturnal community of rodents, M. meridianus accounted for 64.0% in total captured rodents, Dipus sagitta was 15.1%, M. erythrourns was 7.5% and the others were 13.4%. In the rodents community of Junggar Basin, the rate of R. opimus with fleas was 84.9%, which was the highest, followed by M. tamariscinus, Euchoreutes naso and M. erythrourns, with the rates as 71.4%, 66.7% and 62.7% respectively. The rate of M. meridianus with fleas was 38.3%. There were 16 species of parasitic fleas in R. opimus, with the total flea index as 8.58 and the dominant species was Xenopsylla skrjabini. There were 17 and 16 kinds of fleas in M. erythrourns and M. meridianus respectively with the total flea index were 1.59 and 1.15, with dominant fleas were Nosopsyllus laeviceps and X. skrjabini. The serum and organ suspension of 3179 rodents which belonged to 12 species were detected by means of IHA, of them 174 samples were positive and the positive rate was 5.5%. There were 1356 samples of R. opimus in these materials, and 164 were positive, accounted for 12.1%. The samples of M. meridianus were 1255, with 9 positive, accounted for 0.7%. The samples of D. sagitta were 116 with 1 positive and the rate was 0.9%. The samples of other rodents were 452 but were all negative. There were in total 2975 organs collected from rodents, when detected by methods of isolated of Y. pestis. 15 strains of Y. pestis were isolated from 1243 R. opimus, and 2 strains isolated from 1230 M. meridianus. A total number of 11 647 fleas from rodents were detected by methods of isolated of Y. pestis in which 1 strain of Y. pestis was isolated from 4713 X. skrjabini, and 6 were isolated from 2101 Xenopsylla minax, 1 from 328 Xenopsylla conformis conformis and 1 from 250 Echidnophaga oschanini. Among the other 4255 fleas, none was isolated. The biochemical properties of these Y. pestis which isolated from Junggar Basin were positive of Maltose, Ejiao sugar and Glycerol, and negative of Rhamnose and Nitrogen, which were all strongly poisonous to mouse.

Conclusion: The natural plague foci in Junggar Basin spread all over the whole Junggar Basin. There were animal plague cases found in 12 counties (cites) while Karamy, Bole, Jimusaer and Qitai were confirmed as plague foci counties (cities). Animals and vector insects of the foci were complicated but the ecological system was stable. R. opimus was recognized as the dominant host animal and its biochemical type belonged to the Middle Ages, suggesting that the foci was a new type of natural plague foci.
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February 2008

[Dilingdan Decoction prevents renal interstitial fibrosis in a rat model of unilateral ureteral obstruction].

Zhong Xi Yi Jie He Xue Bao 2008 May;6(5):493-7

Department of Nephrology, the 85th Hospital of People's Liberation Army, Shanghai 200052, China.

Objective: To investigate the preventive and therapeutic effects and the possible mechanisms of Dilingdan Decoction (DLDD), a compound Chinese herbal medicine, on rats with renal tubulointerstitial fibrosis induced by unilateral ureteral obstruction (UUO).

Methods: Sixty SD rats were randomly divided into sham-operated group, untreated group, enalapril-treated group and DLDD-treated group. Blood urea nitrogen (BUN), serum creatinine (SCr), urine protein quantization in 24 hours and pathological changes of the obstructed kidney were observed. The expressions of transforming growth factor-beta1 (TGF-beta1), alpha-smooth muscle actin (alpha-SMA), fibronectin (FN) and laminin (LN) were detected by immunohistochemical method and colored-multimedia pathological image analysis system.

Results: Massive inflammatory infiltrates and collagen expression in renal interstitial in the untreated group were observed on the 7th day. Compared with the sham-operated group, percentages of area of TGF-beta1, alpha-SMA, FN and LN expressions in the untreated group were markedly increased (P<0.05), while the percentage of area of interstitial fibrosis was decreased in the DLDD-treated group as compared with the untreated group (P<0.05). On the 14th day, the percentages of area of TGF-beta1, alpha-SMA, FN and LN expressions were declined in two treated groups as compared with the untreated group (P<0.05), but had no statistical difference in biochemical indicators, including BUN, SCr and 24-hour urinary protein. On the 21st day, the level of SCr and the percentage of area of TGF-beta1 expression in the DLDD-treated group were lower than those of the enalapril-treated group (P<0.05).

Conclusion: DLDD can reduce the excretion of urinary protein and the degree of interstitial fibrosis, and significantly inhibit the expressions of TGF-beta1, alpha-SMA, FN and LN. DLDD is superior to enalapril in protecting renal function after long-time application in rats.
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http://dx.doi.org/10.3736/jcim20080512DOI Listing
May 2008

Antihyperglycemic effect of Cephalotaxus sinensis leaves and GLUT-4 translocation facilitating activity of its flavonoid constituents.

Biol Pharm Bull 2007 Jun;30(6):1123-9

School of Life Science and Technology, Beijing Institute of Technology, PR China.

The objectives of this study were to investigate the antihyperglycemic effect of Cephalotaxus sinensis leaves and to identify the active components. The antihyperglycemic effect of various fractions (FA, FB, FC, FD) of the 80% ethanol extract of the leaves was evaluated in streptozotocin (STZ)-induced diabetic rats. Among the tested fractions, FC was the most active. FC (0.48 g/kg) given orally for 10 d reduced significantly (p<0.001) the blood glucose of STZ-induced diabetic rats. The food and water intakes of FC (0.48 g/kg)-treated diabetic rats were reduced significantly (p<0.001) when compared to the 0.5% carboxymethyl cellulose (CMC)-treated diabetic rats. The activity-guided fractionation of the ethanol extract of C. sinensis leaves furnished three flavonoid compounds, apigenin-5-O-[alpha-L-rhamnopyranosyl-(1-->4)-6-O-beta-D-acetylglucopyranoside] (1), apigenin (2), and apigenin-5-O-[alpha-L-rhamnopyranosyl-(1-->4)-6-O-beta-D-glucopyranoside] (3). The elevation of GLUT-4 protein level in membrane preparations from mice adipocytes was detected by Western blot analysis after adipocytes were pre-incubated with FC (0.1, 1, 10 mg/ml), apigenin (0.1, 2 mg/ml) and apigenin-5-O-[alpha-L-rhamnopyranosyl-(1-->4)-6-O-beta-D-acetylglucopyranoside] (0.1, 2 mg/ml), respectively. Phytochemical investigation and HPLC-DAD analysis of FC indicated that the flavonoids were the major constituents in this fraction. These results suggest that the fraction from C. sinensis leaves is a promising drug for the treatment of diabetes, and that the flavonoids from this plant are the active constituents.
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http://dx.doi.org/10.1248/bpb.30.1123DOI Listing
June 2007

[Geography and host distribution of Crimean-Congo hemorrhagic fever in the Tarim Basin].

Zhonghua Liu Xing Bing Xue Za Zhi 2006 Dec;27(12):1048-52

The Center for Disease Control and Prevention of Xinjiang Uygur Autonomous Region, Urumqi 830002, China.

Objective: To determine the infective status and natural distribution of Xinjiang hemorrhagic fever (XHF; Crimean-Congo hemorrhagic fever, CCHF) in ticks, rodents and livestock in the Tarim Basin.

Methods: The pathogenic materials of ticks or rodents' viscera and blood samples of sheep were inoculated into sucking mouse of 24 to 48-hour old. Materials with typical clinic symptoms were identified with RPHA and IFA. RT-PCR was taken to detect special S gene segment of Crimean-Congo hemorrhagic fever virus (CCHFV) in the objective material.

Results: All the samples of ticks, rodents' viscera and blood samples of sheep from 21 counties (cities) in the Tarim Basin were divided into 422 groups and inoculated into sucking mouse at laboratory. 49 materials with typical clinic symptoms were obtained. The morbidity rate with typical clinic XHF was high in Bachu, Yuli, Yutian and Ruoqiang. There were 43 samples identified with RPHA with 6 positive samples and positive rate of 1.4%. The materials with positive RPHA were found in Yuli, Luntai and Yutian. 42 samples were identified with IFA and 13 positive samples with the positive rate of 3.1%. The positive materials of IFA were found in Bachu, Yuli, Minfeng, Luntai and Yutian. 32 samples were detected with RT-PCR and there were 31 samples with special S gene segment of CCHFV (329- 548 nt). The positive materials was widely distributed in Aksu, Awat, Bachu, Luopu, Yuli, Minfeng, Qiemo, Ruoqiang, Luntai and Yutian. The highest infective rate was in Hyalomma asiaticum kozlovi, and followed by sheep. S gene segment was detected in viscera of M. meridianus.

Conclusion: XHF relied on the river in the southern part of Xinjiang and distributed in the areas with Populus euphratica shrub in desert and oasis in the Tarim Basin. The main vector and host were Hyalomma asiaticum kozlovi. Livestock such as sheep, camel, L. yarkandensis, M. meridianus and Euchoreutes naso could serve as the deposited host of XHF.
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December 2006

[Molecular analysis on the S gene of three Crimean-Congo hemorrhagic fever virus strains in China].

Zhonghua Liu Xing Bing Xue Za Zhi 2006 Oct;27(10):880-3

Key Laboratory of Molecular Biology, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China.

Objective: To compare the molecular characteristics of 3 Crimean-Congo hemorrhagic fever viruses(CCHFV) isolated in Xinjiang province.

Methods: YL05035, YT05099 and LT05146 were isolated in 2005 from Hyalomma ticks and viral RNA was extracted from suckling mouse brains infected with these three strains respectively. The polymerase chain reaction(PCR) products of S segments from the 3 strains of CCHFV were directly sequenced.

Results: The full-length'S RNA from the 3 strains of CCHFV all comprised 1673 nucleotides with ORF of them including 1449 nucleotides and encoding a protein which comprised 482 amino acids in a viral complementary sense. The sequences indicated that the three strains of CCHFV isolated from ticks in Xinjiang province were highly homologenic. Data from the phylogenetic analysis showed that the obtained sequences were identical. The homology between 3 strains of CCHFV was 99.5%. Their homologies compared with that of the other strains isolated from other region of Xinjiang were also high at nucleotide levels (92.7%-99.8%). The three strains which were clustered together with 7001 strain and 79121 strain (isolated from patient and rat in Xinjiang respectively) was only different by 2%-3%. The genetic difference from the prototype CCHFV Nigerian strain IBAR10200 was 13%. In comparison, the Nigerian CCHFV tick isolate was more divergent when compared with the reference China strains 66019 and with the three variants mentioned above.

Conclusion: The CCHFV isolated from China comprised a group of genetically high conserved strains.
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October 2006

[Determination of astragulin in Thesium chinese by RP-HPLC].

Zhongguo Zhong Yao Za Zhi 2006 Nov;31(21):1766-7

School of Life Science and Technology, Beijing Institute of Technology, Beijing 100081, China.

Objective: To establish a determination method of astragulin in Thesium chinese.

Method: RP-HPLC analytical method was established using a Polaris C18 column and acetonitrile-water (23:77) as the mobile phase, with a flow rate of 10 mL x min(-1), detected at 346 nm. The method of sample is refluxing exation by 50% alcohol for 2 times.

Result: The content of astragulin was from 0. 120% to 0. 155%, in different groups of T. chinese collected from the same location.

Conclusion: The method was validated to show convenient and reliable.
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November 2006