长链非编码RNA HOTAIR对冠心病的作用及机制研究

[目的]探讨长链非编码RNA(lncRNA)HOX转录反义RNA(HOTAIR)对冠心病(CHD)的影响及其作用机制。[方法]通过实时定量PCR检测CHD患者和健康志愿者外周血血样和内皮祖细胞(EPC)中lncRNA HOTAIR、微小RNA-126(miR-126)和Polo样蛋白激酶4(PLK4)的表达水平;噻唑蓝法检测EPC细胞活力;流式细胞仪检测细胞凋亡率;Western blot检测自噬相关蛋白LC3-Ⅱ和Beclin1的表达。激光共聚焦显微镜观察细胞自噬情况。miRcode软件和双荧光素酶报告基因实验分析lncRNA HOTAIR和miR-126的相互关系。TargetScan软件和双荧光素酶报告基因实验分析miR-126和PLK4的相互关系。Western blot检测lncRNA HOTAIR通过miR-126对EPC细胞哺乳动物雷帕霉素靶蛋白(mTOR)通路的影响。[结果] lncRNA HOTAIR和PLK4在CHD血样和EPC细胞中的表达明显上调(P<0.01),miR-126表达明显下调(P<0.01)。下调lncRNA HOTAIR或PLK4促进E...     

Inverse correlation of soluble programmed cell death-1 ligand-1 (sPD-L1) with eosinophil count and clinical severity in allergic rhinitis patients

Background

T-cell response outcome is determined by co-stimulatory/inhibitory signals. Programmed cell death-1 ligand-1 (PD-L1) is a member of these co-signaling molecules with known soluble form in human serum. Soluble PD-L1 (sPD-L1) is also recognized in patients with some types of malignancy or autoimmune disorders, though there are few studies on sPD-L1 roles in allergic diseases. The purpose of this survey was to evaluate the association between sPD-L1 levels with eosinophil count as well as disease severity in allergic rhinitis (AR) patients.

Immunohistochemical expression of Cyclin D1, Cyclin E,p21/waf1 and p27/kip1 in inflammatory bowel disease: correlation with other cell-cycle-related proteins (Rb,p53, ki-67 and PCNA) and clinicopathological features

Background and aims The expression patterns of cyclins D1 and E as well as cyclin-dependent kinase inhibitors p21/waf1 and p27/kip1 and their correlation with clinical parameters and other cell cycle regulators was investigated in inflammatory bowel disease (IBD).Patients and methods These molecular markers were localized immunohistochemically using the monoclonal antibodies anti-cyclin D1 (DCS-6), anti-cyclin E (13A3), anti-p21 (4D10) and anti-p27 (1B4) in 70 patients with IBD, 30 patients with colorectal cancer and eight healthy subjects. Data were analyzed statistically using the software program.Results Cyclin D1 expression was higher in both UC and CD compared with the healthy control group. In addition, CD cyclin D1 expression was higher compared with UC cases and colorectal carcinomas. Cyclin D1 expression was correlated with disease activity and cell proliferation in UC cases. A positive relationship of cyclin D1 with p27/kip1 in both UC and CD was detected. Cyclin E expression was higher in UC, CD and carcinomas compared with healthy control group and its expression correlated with proliferative activity in both UC and CD cases. p21/waf1 expression was higher in IBD cases compared with that of the control group, while a decreased p21/waf1 expression in the group of carcinomas was noted. This expression was correlated with disease activity in UC and the proliferative activity in both UC and CD. The expression of cyclins D1 and E as well as p21/waf1 was also correlated with the existence of dysplastic lesions. A lower p27/kip1 expression in the group of carcinomas compared with IBD cases and healthy controls was found.Conclusions The expression patterns of cyclin D1, cyclin E, p21/waf1 and p27/kip1 in IBD may indicate their contribution in epithelial cell turnover and their possible implication in IBD-related dysplasia-carcinoma.