Publications by authors named "Xianyi Wu"

4 Publications

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A comparative study on chemical compositions and biological activities of four essential oils: Cymbopogon citratus (DC.) Stapf, Cinnamomum cassia (L.) Presl, Salvia japonica Thunb. and Rosa rugosa Thunb.

J Ethnopharmacol 2021 Nov 28;280:114472. Epub 2021 Jul 28.

School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, China. Electronic address:

Ethnopharmacological Relevance: Essential oils (EOs) are important active ingredients in Chinese herbal medicine. Cymbopogon citratus (DC.) Stapf, Cinnamomum cassia (L.) Presl, Salvia japonica Thunb., and Rosa rugosa Thunb. are used in local and traditional medicine to treat inflammation-related diseases. While the constituents and bioactivities of EOs of the above four Chinese herbals have been reported previously, but their anti-inflammatory and antioxidant activities have not been systematically evaluated.

Aim Of The Study: The purpose of this study was to research the chemical constituents, anti-inflammatory activities, and antioxidant activities of EOs of four Chinese herbal medicines.

Materials And Methods: Fresh plant materials were collected both in August 2018. The compositions of EOs were determined by the gas chromatography-mass spectrometry (GC-MS) method. TPA (12-O-tetradecylphophenol-13-acetate)-induced mouse ear model was evaluated the anti-inflammatory activities of EOs. The reduction of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), cyclooxygenase-2 (COX-2) and RelA protein of the nuclear factor kappa-B (NF-κB) in the signal pathway (P65) were measured. The antioxidant activities of EOs from four plants were determined by using 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging method.

Results: A total of 217 compounds were separated and identified from four EOs, mainly including trans-cinnamylaldehyde (68.75%), citronellal (38.16%), linalool (1.02-33.73%), geraniol (19.39%) and citronellol (17.18%). All four EOs reduced the damage of the ear tissue and had certain anti-inflammatory effects, and the EOs of C. citratus (CyCEOs) and S. japonica (SJEOs) had the best anti-inflammatory activities among others, even better than ibuprofen. The four EOs exhibited different DPPH radical-scavenging activities (IC, 0.101-1.017%), where most of them were much lower than that of EOs of C. citratus (CiCEOs) (IC, 0.101%) and EOs of R. rugosa (RREOs) (IC, 0.142%).

Conclusions: The main components determine diverse propertise of these four EOs, our results suggested that four EOs presented anti-inflammatory and antioxidant effect via reducing the expression of TNF-a, IL-6, COX-2, and NF-κB p65, which may provide a new approach for development of new anti-inflammatory drugs.
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November 2021

The Effect of Medical Insurance on Outpatient Visits by the Elderly: An Empirical Study with China Health and Retirement Longitudinal Study Data.

Appl Health Econ Health Policy 2019 04;17(2):175-187

Key Laboratory of Advanced Theory and Application in Statistics and Data Science, East China Normal University, Ministry of Education, Shanghai, China.

Background: As the largest developing country in the world, China is still on its way towards building an adequate system of health insurance through continuous reforms. For the elderly in China, an effective medical security system might be especially helpful.

Objective: This study investigates the effect of medical insurance on outpatient visits by elderly Chinese in order to identify effective policies to improve the Chinese medical security system.

Methods: Based on data taken from the China Health and Retirement Longitudinal Study, eleven candidate models were analyzed, among which a finite mixture negative binomial model with two components was chosen as the theoretical foundation for an analysis of the effect of medical insurance on outpatient visits by elderly Chinese.

Results: The significant variables were found to be basic medical insurance (BMI), sex, surveyed area, education level, health status, economic area, income level, and the number of living children for the elderly aged 60-69 years; BMI, age, health status, number of household members, and income level for the elderly aged 70-79 years; and BMI, age, sex, and the presence of chronic disease for the elderly aged 80 years and above.

Conclusion: Enrollment in BMI was found to be significantly associated with an increased number of outpatient visits, whereas supplementary medical insurance membership did not have a significant effect. The effects of BMI enrollment also differed by scheme and age. For those with a high rate of outpatient medical services utilization, the enhancing effect of BMI on the number of outpatient visits was not significant, so new medical insurance policies should be provided to the elderly population in China.
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April 2019

Chemokine (C-X-C motif) ligand 1 is associated with tumor progression and poor prognosis in patients with colorectal cancer.

Biosci Rep 2018 08 2;38(4). Epub 2018 Jul 2.

Department of Gastrointestinal Surgical Oncology, Fujian Cancer Hospital and Fujian Medical University Cancer Hospital, Fuzhou 350014, China

Chemokine (C-X-C motif) ligand 1 (CXCL1) is a chemotactic cytokine known to regulate cancer progression and invasion. However, the prognostic significance of CXCL1 expression in colorectal cancer (CRC) has not been fully characterized. The present study explored the clinicopathological significance and potential role of CXCL1 in the carcinogenesis and progression of CRC. The protein expression of CXCL1 was measured immunohistochemically in tissue microarrays constructed from 276 CRC patients. CXCL1 expression levels and their associations with clinicopathological characteristics and patient survival were evaluated. The effect of CXCL1 on glycolysis was also examined High CXCL1 expression was detected in 165 (59.8%) cases. CXCL1 expression was correlated with tumor diameter (=0.002), T stage (=0.044), N stage (=0.005), M stage (=0.001), lymphovascular invasion (=0.010), and carcinoembryonic antigen status (=0.019). High CXCL1 expression was validated as an independent prognostic factor for overall survival (OS) and disease-free survival (DFS) by both univariate and multivariate Cox regression analyses (both <0.05). Experimentally, expression of CXCL1 was knocked down by stable transfected short hairpin RNA, resulting in a significantly decreased rate of glycolysis both in assays and in patients' samples (<0.05). Silencing the expression of CXCL1 decreased the levels of the glycolytic enzymes GLUT1, HK2, and LDHA. In conclusion, by inducing glycolysis, CXCL1 plays a crucial role in both cancer progression and metastasis in CRC patients. The CXCL1 expression level is an independent prognostic factor for both OS and DFS. Moreover, CXCL1 may serve as a new biomarker and potential therapeutic target for CRC treatment.
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August 2018

Negative lymph node count is a significant prognostic factor in patient with stage IV gastric cancer after palliative gastrectomy.

Oncotarget 2017 Sep 26;8(41):71197-71205. Epub 2017 Apr 26.

Department of Gastrointestinal Surgical Oncology, Fujian Provincial Key Laboratory of Tumor Biotherapy, Fujian Cancer Hospital & Fujian Medical University Cancer Hospital, Fuzhou 350014, China.

Negative lymph node (NLN) count has been validated as a protective predictor in various cancers after radical resection. However, the prognostic value of NLN count in the setting of stage IV gastric cancer patients who have received palliative resection has not been investigated. Surveillance, Epidemiology, and End Results Program (SEER)-registered gastric cancer patients were used for analysis in this study. Kaplan-Meier survival curves and multivariate Cox proportional hazards model were used to assess the risk factors for patients' survivals. The results showed that NLN count and N stage were independently prognostic factors in patients with stage IV gastric cancer after palliative surgery (P< 0.001). X-tile plots identified 2 and 11 as the optimal cutoff values to divide the patients into high, middle and low risk subsets in term of cause-specific survival (CSS). And NLN count was proved to be an independently prognostic factor in multivariate Cox analysis (P< 0.001). The risk score of NLN counts demonstrated that the plot of hazard ratios (HRs) for NLN counts sharply increased when the number of NLN counts decreased. Collectively, our present study revealed that NLN count was an independent prognostic predictor in stage IV gastric cancer after palliative resection. Standard lymph node dissection, such as D2 lymphadectomy maybe still necessary during palliative resection for patients with metastatic gastric cancer.
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September 2017