树突状细胞、自然杀伤细胞和粘附分子在银屑病发病中的作用

目的　研究树突状细胞、自然杀伤细胞 (NK细胞 )和粘附分子在银屑病发病中的作用。方法　采用免疫组化方法检测治疗前后银屑病皮损区人类白细胞抗原 - DR(HL A- DR)、CD1a、CD16、CD5 7、肿瘤坏死因子 - α(TNF- α)、细胞间粘附分子 - 1(ICAM- 1)的表达。结果　银屑病进行期和静止期皮损区 HL A- DR、CD1a、CD16、CD5 7、TNF- α及 ICAM- 1阳性表达无显著性差异 (P>0 .0 5 ) ;治疗后消退期皮损组织病理改善 ,各标记阳性表达明显减少甚至消失 ,经 Wilcoxon秩和检验有统计学差异 (P<0 .0 5 )。结论　树突状细胞、NK细胞和粘附分子在银屑病的发病中起着非常重要的作用     

广西龙州县男性多性伴人群性行为特征和安全套使用影响因素

目的 分析农村地区成年男性多性伴人群的性行为学特征,探讨影响其坚持使用安全套的因素,为今后性病,尤其是艾滋病的防控工作提供科学依据.方法 于2017-2019年在广西壮族自治区龙州县农村地区招募男性多性伴人群,获取知情同意后对其进行面对面问卷调查或电子问卷调查,同时采集5 mL静脉血检测艾滋病病毒(HIV)抗体、梅毒抗...     

皮肌炎皮损和受累肌肉中细胞凋亡的研究

目的　探讨皮肌炎皮损、肌细胞及浸润淋巴细胞凋亡的表达及皮质类固醇激素的影响。方法　对 2 2个标本用 TU NEL 原位末端标记法检测角质形成细胞、肌细胞及淋巴细胞凋亡。 10例用皮质激素者为 A组 ,12例未用者为 B组。结果　 A组角质形成细胞、肌细胞及淋巴细胞有较多的凋亡 ,凋亡指数 (AI)明显大于 B组(P<0 .0 5 )。皮质类固醇激素使用时间在 2周以内者 ,凋亡细胞较少。在观察中未发现凋亡与皮肤、肌肉病理损害程度有关。结论　皮质类固醇激素可能具有诱导角质形成细胞、肌细胞及淋巴细胞凋亡的作用 ,这可能是皮质类固醇激素的治疗机理之一。激素使用时间的长短似与细胞凋亡程度有关。     

Mediation of mitochondrial translocator protein by tanshinone ⅡA in apoptosis of HepG2 cells北大核心CSCD

Aim To investigate the role of mitochondrial translocator protein(TSPO)in the apoptosis of HepG2 cells induced by tanshinone IIA(Tan II A)and the involved mechanism. Methods Following the HepG2 cells treated with Tan ⅡA at 2.5, 5 and 10 μmol·L-1, the cell viability was determined by MTT assay, and intracellular ATP content was determined by luciferin-luciferase method. Oxygen utilization was measured polarographically with a Clark oxygen electrode. Cell apoptosis was determined by Hoechst 33342 staining and flow cytometry. The mitochondrial membrane potential was assessed with JC-1 staining. The intracellular distribution of TSPO was examined by TSPO immunostaining, and the expressions of TSPO, Cyto C, caspase-3, caspase-9 were determined by immunoblotting analysis. Results Tan II A inhibited the proliferation of HepG2 cells in a dose-and time-dependent manner. The treatment with Tan II A inhibited ATP production and oxygen utilization of mitochondria. In addition, Tan ⅡA enhanced TSPO expression and accumulation in nuclei and up-regulated the expression of Cyto C, caspase-3 and caspase-9. Conclusions Tan II A induces the apoptosis of HepG2 cells, which may be related to the TSPO-mediated mitochondrial dysfunction. © 2023 Publication Centre of Anhui Medical University. All rights reserved.