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Nanjing, China

Lv T.,Nanjing University | Yuan D.,Nanjing University | Miao X.,Nanjing University | Lv Y.,Nanjing University | And 3 more authors.
PLoS ONE | Year: 2012

Background: Lysine specific demethylase 1 (LSD1) has been identified and biochemically characterized in epigenetics, but the pathological roles of its dysfunction in lung cancer remain to be elucidated. The aim of this study was to evaluate the prognostic significance of LSD1 expression in patients with non-small cell lung cancer (NSCLC) and to define its exact role in lung cancer proliferation, migration and invasion. Methods: The protein levels of LSD1 in surgically resected samples from NSCLC patients were detected by immunohistochemistry or Western blotting. The mRNA levels of LSD1 were detected by qRT-PCR. The correlation of LSD1 expression with clinical characteristics and prognosis was determined by statistical analysis. Cell proliferation rate was assessed by MTS assay and immunofluorescence. Cell migration and invasion were detected by scratch test, matrigel assay and transwell invasion assay. Results: LSD1 expression was higher in lung cancer tissue more than in normal lung tissue. Our results showed that over-expression of LSD1 protein were associated with shorter overall survival of NSCLC patients. LSD1 was localized mainly to the cancer cell nucleus. Interruption of LSD1 using siRNA or a chemical inhibitor, pargyline, suppressed proliferation, migration and invasion of A549, H460 and 293T cells. Meanwhile, over-expression of LSD1 enhanced cell growth. Finally, LSD1 was shown to regulate epithelial-to-mesenchymal transition in lung cancer cells. Conclusions: Over-expression of LSD1 was associated with poor prognosis in NSCLC, and promoted tumor cell proliferation, migration and invasion. These results suggest that LSD1 is a tumor-promoting factor with promising therapeutic potential for NSCLC. © 2012 Lv et al. Source

He J.,Soochow University of China | Qiao J.-B.,Nanjing Chest Hospital | Zhu H.,Nanjing Medical University
Medical Oncology | Year: 2011

Methylation in the promoter region is one of the mechanisms through which tumor suppressors are inactivated, resulting in tumorigenesis and/or tumor progression. Herein, we studied the methylation status in the promoter region of the p14 ARF tumor suppressor gene in 33 brain tissues isolated from glioma patients (astrocytomas) and compared to 12 brain tissues isolated from autopsy donors using methylation-specific polymerase chain reaction (MSP). The correlation between the expression of P14 and P53 was investigated using immunohistochemistry (IHC). The average percentage of methylation in the promoter region of p14 ARF gene in brain samples from glioma patients is 39.4%, while 0 from autopsy donors. No difference in the methylation level between low-grade and high-grade gliomas was detected. The methylation status has no correlation with the prognosis in glioma patients. A significant correlation between the expression of mutant form of TP53 and the grade of the glioma was established. Furthermore, there was a negative correlation between methylation of the p14 ARF promoter and the expression of the mutant form of TP53. Therefore, our data suggest that methylation in the promoter region of the p14 ARF gene may be used as a biomarker for the diagnosis of gliomas. © 2010 Springer Science+Business Media, LLC. Source

Ji Y.-N.,Jiangsu Province Hospital of Traditional Chinese Medicine | Wang Q.,No. 81 Hospital of PLA | Zhan P.,Nanjing Chest Hospital
Molecular Biology Reports | Year: 2012

Coronary atherosclerosis is a leading cause of coronary heart disease (CHD). Atherosclerotic lesion is a complex polygenic disease in which gene-environment interactions play a critical role in disease onset and progression. The ICAM1 gene-E469K polymorphism has been reported to be associated with CHD, but results were conflicting. A systematic review and meta-analysis of the published studies were performed to gain a clearer understanding of this association. The PubMed, Embase, and CNKI databases were searched for case-control studies published up to August 2011. Data were extracted and pooled odds ratios (OR) with 95% confidence intervals (CI) were calculated. Twelve eligible studies, comprising 2,157 cases and 1,952 controls, were included in the meta-analysis. The pooled result showed that the ICAM1 gene- E469K polymorphism was significantly associated with an increased risk of CHD (OR = 1.496, 95% CI = 1.363- 1.642, for the allele K vs. allele E; OR = 1.919, 95% CI = 11.635-2.253, for the K allele carriers vs. EE). Subgroup analysis supported the results in the Asian populations and in the Caucasian populations. This meta-analysis suggests that the ICAM1 gene K469E polymorphism is associated with CHD risk and the K allele is a more significant risk factor for developing CHD among Asian and Caucasians populations. © Springer Science+Business Media B.V. 2011. Source

Zhan P.,Nanjing Chest Hospital | Wang Q.,No. 81 Hospital of PLA | Qian Q.,Nanjing Chest Hospital | Wei S.-Z.,Nanjing University | Yu L.-K.,Nanjing Chest Hospital
Journal of Experimental and Clinical Cancer Research | Year: 2011

Background: Many studies have examined the association between the CYP1A1 MspI and exon 7 gene polymorphisms and lung cancer risk in various populations, but their results have been inconsistent. Methods. To assess this relationship more precisely, a meta-analysis and review were performed. The PubMed, Embase, Web of Science, and CNKI database was searched for case-control studies published up to June 2010. Data were extracted and pooled odds ratios (OR) with 95% confidence intervals (CI) were calculated. Results: Ultimately, 64 studies, comprising 18,397 subjects from 49 case-control studies of the MspI genotype and 18,518 patients from 40 case-control studies of the exon 7 genotype, were included. A significantly elevated lung cancer risk was associated with 2 MspI genotype variants (for type C vs Type A: OR = 1.26, 95% CI = 1.12-1.42; for types B and C combined vs Type A: OR = 1.20, 95% CI = 1.13-1.28) in overall population. In the stratified analysis, a significant association was found in Asians, Caucasians, lung SCC, lung AC and Male population, not in mixed population, lung SCLC and Female population. However, inconsistent results were observed for CYP1A1 exon7 in our meta-analysis, two variants of the exon 7 polymorphism were associated with a significantly higher risk for lung cancer (for Val/Val vs Ile/Ile: OR = 1.24, 95% CI = 1.09-1.42; for (Ile/Val +Val/Val) vs Ile/Ile: OR = 1.15, 95% CI = 1.07-1.24) in overall population. In the stratified analysis, a significant assocation was found in Asians, Caucasians, lung SCC and Female population, not in mixed population, lung AD, lung SCLC and Male population. Additionally, a significant association was found in smoker population and not found in non-smoker populations for CYP1A1 MspI and exon7 gene. Conclusions: This meta-analysis suggests that the MspI and exon 7 polymorphisms of CYP1A1 correlate with increased lung cancer susceptibility and there is an interaction between two genotypes of CYP1A1 polymorphism and smoking, but these associations vary in different ethnic populations, histological types of lung caner and gender of case and control population. © 2011 Zhan et al; licensee BioMed Central Ltd. Source

Xu C.,Nanjing Chest Hospital | Hao K.,Nanjing Chest Hospital | Yu L.,Nanjing Chest Hospital | Zhang X.,Nanjing Jiangning Hospital
Biomarkers | Year: 2014

Objective: The aim of this study was to explore the clinical role of serum interleukin (IL)-17 in patients with non-small-cell lung cancer (NSCLC). Materials and method: Serum specimens from 128 patients with NSCLC and 60 healthy controls were collected. The concentrations of IL-17 were measured using enzyme-linked immunosorbent assay. Results: Serum IL-17 levels were higher in the NSCLC group in comparison with the control group (p < 0.01). With a cut-off value of 16 pg/ml, IL-17 showed a good diagnostic performance for NSCLC. Multivariate survival analysis indicated that IL-17 was an independent prognostic factor in NSCLC. Conclusion: Measurement of IL-17 might be a useful diagnostic and prognostic value for patients with NSCLC. © 2014 Informa UK Ltd. Source

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