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Shaoguan, China

Li Y.,Jinan University | Li Y.,Southern Medical University | Liu H.,Guangdong Women and Children Hospital | Lai C.,Jinan University | And 3 more authors.
Cell and Tissue Research | Year: 2013

We investigate the role of the Lin28/let-7a/c-Myc pathway in non-muscle invasive bladder cancer (NMIBC). Using RT-PCR, western blot and immunohistochemistry techniques, the levels of pre-let-7a, let-7a, Lin28 and c-Myc RNA and/or proteins were determined in samples of normal bladder tissue and bladder cancer. Expression of pre-let-7a was found to be negatively correlated with the pathological grade of bladder cancer, while let-7a showed a positive correlation with bladder cancer pathological grade. Expression of Lin28 RNA and protein was not significantly different between normal bladder tissue and low-grade transitional cell carcinoma of bladder (TCC) but the expression levels in high-grade TCC were remarkably increased. Expression of c-Myc RNA and protein was significantly higher in bladder cancer samples in comparison to normal bladder tissue without correlation with cancer differentiation. Expression of all the above RNAs and proteins showed no significant difference in Ta and T1 stages. The Lin28/let-7a/c-Myc pathway plays an important role in NMIBC. In particular, expression levels of let-7a correlate with the degree of cancer differentiation but not cancer stage. © 2013 Springer-Verlag Berlin Heidelberg. Source


Zhou Y.C.,Southern Medical University | Liu B.,Southern Medical University | Li Y.J.,Southern Medical University | Jing L.L.,Southern Medical University | And 5 more authors.
Evidence-based Complementary and Alternative Medicine | Year: 2012

Buyang Huanwu decoction (BYHWD) is a well-known and canonical Chinese medicine formula from Correction on Errors in Medical Classics in Qing dynasty. Here, we show that BYHWD could alleviate the ventricular remodeling induced by left anterior descending (LAD) artery ligation in rats. BYHWD treatment (18 g/kg/day) decreased heart weight/body weight (HW/BW), left ventricle (LV) dimension at end diastole (LVDd) and increased LV ejection fraction (LVEF) and LV fractional shortening (LVFS) significantly compared to model group at the end of 12 weeks. The collagen volume of BYHWD group was more significantly decreased than that of model group. Proteomic analysis showed that atrial natriuretic factor (ANF) was downregulated; heat shock protein beta-6 (HSPB6) and peroxiredoxin-6 (PRDX6) were upregulated in BYHWD-treated group among successfully identified proteins. The apoptotic index (AI) was reduced by BYHWD accompanied by decreased expression of Bax and caspase 3 activity, increased Bcl-2/Bax ratio, and phosphorylation of HSPB6 compared to that of model group. Taken together, these results suggest that BYHWD can alleviate ventricular remodeling induced by LAD artery ligation. The antiremodeling effects of BYHWD are conferred by decreasing AI through affecting multiple targets including increased Bcl-2/Bax ratio and decreased caspase 3 activity that might be via upregulated PRDX6, phosphorylation of HSPB6 and subsequently reduction of ANF. © 2012 Ying Chun Zhou et al. Source


Tang H.,Sun Yat Sen University | Wang H.,Chinese PLA General Hospital | Bai J.,Sun Yat Sen University | Ding M.,Yuebei Peoples Hospital | And 6 more authors.
American Journal of Rhinology and Allergy | Year: 2012

Background: Although Interleukin (IL)-17A has been suggested to play a role in corticosteroid hyporesponsiveness, whether IL-17A is able to affect the sensitivity of MUC5AC to intranasal corticosteroid treatment in patients with allergic rhinitis (AR) is unclear. Methods: Twenty patients with moderate to severe AR were enrolled in this study and the expression of MUC5AC, IL-17A, and glucocorticoid receptor beta (GR beta) was detected using immunochemical staining and quantitative reverse transcription polymerase chain reaction (RT-PCR) before and after treatment with fluticasone propionate (FP) nasal spray for 4 weeks, respectively. In addition, the effects of FP on IL-13- and IL-17A-induced MUC5AC and GR beta were also evaluated in the primarily cultured human nasal epithelial cells (HNECs) in vitro. Results: The increased MUC5AC expression was associated with IL-17A levels in AR, and IL-17A was found to affect the inhibition of MUC5AC by corticosteroid treatment. Both IL-13 and IL-17A significantly promoted MUC5AC mRNA expression in HNECs, and FP treatment was able to significantly inhibit MUC5AC mRNA expression in HNECs induced by IL-13 but not for that induced by IL-17A. Also, IL-17A but not IL-13 promoted GR beta mRNA expression in HNECs, which was not affected by administration of corticosteroid. Conclusion: Our results suggest that the sensitivity of MUC5AC to topical corticosteroid is negatively associated with IL-17A in AR patients. This might help us to gain more insight into the pathophysiology and the pharmacotherapeutic mechanisms on AR treatment. Copyright © 2012, OceanSide Publications, Inc. Source


Huang Y.-X.,Southern Medical University | Zong L.-L.,Southern Medical University | Lin J.-H.,Jinan University | Fu Y.-G.,Sun Yat Sen University | And 5 more authors.
Chinese Journal of Medical Genetics | Year: 2013

Objective: To assess the association of a single nucleotide polymorphism (SNP) in tumor suppressor gene P53 with the risk of endometriosis (EM) in Han Chinese women. Methods: For 460 EM patients, 113 patients with endometrial carcinoma and 530 matched unrelated controls, a rs1042522(C/G) SNP of the P53 gene was genotyped by polymerase chain reaction-single strand polymorphism (PCR-SSP) and DNA sequencing. Results: A significant difference has been detected in the distribution of rs1042522 alleles and genotypes between the EM patients and controls (P<0.01). Allele G has increased the risk of EM by 1.209 times, while allele C has reduced this risk by 0.837 times. Compared with GG genotype, GC and CC genotypes have both increased the risk for EM (OR = 2.073, 95%CI: 1.521-2.820, and OR = 1.930, 95%CI: 1.363-2.733, respectively). Significant differences were also detected in the distribution of rs1042522 alleles and genotypes between endometrial carcinoma patients and controls (P<0.01). Allele G has increased the risk to endometrial carcinoma by 1.311 times, while allele C has reduced this risk by 0.757 times. Compared with GG genotypes, individuals with GC and CC genotypes are more likely to be affected with endometrial carcinoma (OR = 2.778, 95%CI: 1.585-4.870, and OR = 2.864, 95%CI: 1.557-5.263, respectively). Conclusion: Our study has suggested a significant association between the rs1042522(G/C) polymorphism and susceptibility to EM in Han Chinese women. The mechanism of EM is similar to carcinoma from genetics point of view. Source


Fan Y.,Sun Yat Sen University | Feng S.,Sun Yat Sen University | Xia W.,Sun Yat Sen University | Qu L.,Sun Yat Sen University | And 7 more authors.
American Journal of Rhinology and Allergy | Year: 2012

Background: Although the prevalence of aspirin-exacerbated respiratory disease (AERD) in western populations is high, AERD is rather rare in China, and few related studies have been published to date. Methods: We performed a prospective cohort investigation on the incidence of AERD in patients with chronic rhinosinusitis (CRS) in southern China. A literature search of the China Academic Journal Network Publishing Database was conducted to obtain an overview of the incidence of AERD in the Chinese population, and previous studies on the incidence of AERD were reviewed. Results: We found 2 patients with aspirin hypersensitivity among 351 consecutive CRS (309 with nasal polyps [NPs]) patients, suggesting a rate of 0.57% in the CRS population. Forty-five articles about AERD were obtained by Chinese-language literature searches. In total, 346 cases of AERD were reported during the past 30 years. Conclusion: Given the large population of NPs in China, the prevalence of AERD is very low, and this may be related to the reduced levels of nasal tissue eosinophilia and subsequent low asthma comorbidity. Copyright © 2012, OceanSide Publications, Inc., U.S.A. Source

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