基因甲基化水平在宫颈癌诊断中的应用价值

摘要：目的：探讨SOX14基因甲基化定量检测对宫颈上皮内瘤变(CIN)及宫颈癌诊断的临床应用价值。 方法：采用荧光定量甲基化PCR(QMSP)检测101例宫颈液基细胞样本（包括正常细胞27例,CIN2期24例,CIN3期33例,宫颈癌17例）中SOX14基因的甲基化水平,通过Kruskal-Wallis H检验分析其在正常、CIN2期、CIN3期及宫颈癌分组中的甲基化水平差异,并采用ROC曲线分析SOX14甲基化对宫颈癌的临床诊断效能。 结果：SOX14基因甲基化水平随宫颈病变程度的升高而逐渐升高,各期间差异有统计学意义（H=52.55,P＜0.01）。当cut off值为87.21时,SOX14基因甲基化水平诊断宫颈癌的敏感性和特异性分别为94.12%和96.30%。 结论：SOX14基因甲基化水平与宫颈病变程度具有一定相关性,宫颈脱落细胞样本SOX14基因甲基化水平可能作为宫颈癌诊断的潜在指标。     

Effects of curcumin on proliferation and apoptosis of human cervical carcinoma HeLa cells <Emphasis Type="Italic">in vitro</Emphasis>

Objective: To investigate the regulatory effect of curcumin on profiferation and apoptosis in human cervical carcinoma ceil fine HeLa in vitro. Methods: Human cervical carcinoma cell line Hela was cultured in vitro. HeLa cells were treated with 10-50μmol/L cureumin for 24-72 h and the growth inhibition rates of HeLa ceils were measured by MTT method. Cell apoptosis was inspected by electron microscopy. In addition, the expression of bcl-2, bcl-x1 and caspase-3 protein in HeLa cell were observed by SP immunohistochemistry. Results: Curcumin inhibited the proliferation of HeLa cells on a dose-depending manner.Peak of subG1 appeared on DNA histogram in FCM. A portion of the cells presented the characteristic morphological changes of apoptosis under the electron microscope. The bcl-2, bcl-x1 expression was decreased while Caspase-3 expression was increased. Conclusion:Curcumin could significantly inhibit the growth of HeLa cells; inducing apoptosis through up-regulating Caspase-3 and down-regulating expression of bcl-2 and bcl-x1 was probably one of its molecular mechanisms.     

抑制PI3K/Akt信号通路拮抗胰岛素诱导的子宫内膜癌细胞增殖

目的:研究抑制磷脂酰肌醇3激酶(PI3K)/Akt信号通路对胰岛素诱导的子宫内膜癌细胞增殖的拮抗作用。方法:将无血清饥饿的子宫内膜癌Ishikawa3-H-12细胞分为空白对照组、10-6mol/L胰岛素单独刺激组以及不同剂量PI3K抑制剂-LY294002预处理后再用胰岛素刺激组。Western blot检测各组Akt磷酸化(p-Akt)水平,MTT试验观察细胞增殖情况。结果:胰岛素可引起内膜癌细胞Akt活化,刺激15min后p-Akt/Akt比值显著高于空白对照组(68.68%vs 26.21%,P<0.001)。LY294002以浓度依赖方式抑制胰岛素引起的Akt磷酸化。MTT试验显示,在药物处理24h,48h和72h 3个时间点,不同组别570nm吸光度值(OD570nm)均有显著差异(F=156.329,700.973,812.224,均P<0.001)。胰岛素组OD570nm值均高于同时间点的空白对照组(均P<0.001),胰岛素促内膜癌细胞增殖作用于48h时最为显著。LY294002可抑制胰岛素的增殖促进作用,此抑制作用具有浓度依赖性。不同剂量LY294002抑制作用的时间依赖性不同,48h时小剂量(0.1、1、10μmol/L)的抑制作用最为显著,72h时胰岛素重新呈现一定的促增殖作用;而50μmol/L LY294002可以持久抑制胰岛素的促增殖作用。结论:PI3K抑制剂LY294002可以通过抑制Akt磷酸化阻断胰岛素信号传导,拮抗后者促子宫内膜癌细胞增殖的作用。     

Anti-Tumor Effect of Curcumin on Human Cervical Carcinoma HeLa Cells In Vitro and In Vivo

Objective: To investigate the anti-tumor effect of curcumin on human cervical carcinoma HeLa cells in vitro and in vivo. Methods: (1) Human cervical carcinoma cell line HeLa was cultured in vitro. HeLa cells were treated with 5-50 μmol/L curcumin for 24. 48, 72 h and the growth inhibition rates of HeLa cells were measured by MTT method. Cell apoptosis was inspected by electron microscopy and flow cytometry (FCM). (2) A transplanted tumor model by injecting HeLa cells into subcutaneous tissue of BABL/C mice was established and its growth curve was measured. 30 BABL/C mice with tumors were divided into 2 groups at random and 0.2 ml saline or 0.2 ml 250 μmol/L curcumin was injected into abdominal cavity respectively once everyday and lasted for ten days. The changes of tumor volume were measured continuously and tumor inhibition rate was calculated. At last the expressions of caspase-3 and bax protein in transplanted tumors were detected by immunohistochemistry. Results: (1) Curcumin inhibited the proliferation of Lela cells on a dose-depending manner. Apoptosis of cells could be observed by FCM. Partial cells presented the characteristic morphological changes of apoptosis under electron microseope. (2) When 1×107 HeLa cells were inoculated for each mouse, 100% of the mice developed growing tumors after seven days. An inhibition effect was observed in treatment group, and the inhibition rate of curcumin was 74.33%. The expressions of caspase-3 and bax in the transplanted tumors were increased in curcumin group. Conclusion: Curcumin is effective as an anti-cancer drug not only in vitro but also in vivo.     

子宫内膜癌患者保留生理功能的治疗

子宫内膜癌是妇科常见恶性肿瘤之一,约75%的患者为早期病例,对于Ⅰ期子宫内膜癌的首选治疗方法为筋膜外全子宫切除、双附件切除及盆腔、腹主动脉旁淋巴结取样和（或）清扫术,术后5年存活率达83%～93%,预后较好.但标准的手术治疗使年轻的子宫内膜癌患者失去了生育机会及卵巢内分泌功能,严重影响患者的生存质量.因此,子宫内膜癌患者保留生理功能的治疗,包括保留年轻子宫内膜癌患者的生育功能或卵巢内分泌功能,以及对手术治疗后的子宫内膜癌患者进行激素替代治疗,成为近年较为关注的问题.     

糖肾平对高糖+LPS刺激足细胞TGF-β1/Smad7信号转导通路影响的研究

目的:观察糖肾平胶囊对高糖环境下脂多糖(lipopolysaccharide,LPS)刺激足细胞转化生长因子-β1(transforming growth factor-β1,TGF-β1)/Smad7信号转导通路的影响,并探讨其作用机制.方法:以高糖、LPS刺激足细胞建立模型,分为正常组、高糖组、高糖+LPS组、厄贝沙坦组、糖肾平小、中、大剂量组和抑制剂组.采用Western-Blotting方法检测足细胞中TGF-β1、Smad7、核因子-κB(nuclear factor-kappaB,NF-κB)的表达.结果:与正常组比,高糖组和高糖+LPS组足细胞TGF-β1、NF-κB表达明显升高(P<0.01),Smad7表达明显降低(P<0.01);抑制剂组足细胞TGF-β1、NF-κB蛋白表达比高糖组和高糖+LPS组均明显降低(P<0.01),Smad7蛋白表达明显升高(P<0.01),厄贝沙坦组TGF-β1蛋白表达比高糖组和高糖+LPS组降低(P<0.05),NF-κB蛋白表达明显降低(P<0.01),Smad7蛋白表达明显升高(P<0.01),糖肾平胶囊大、中、小剂量组足细胞中TGF-β1蛋白表达比高糖组和高糖+LPS组均降低(P<0.05),大剂量组足细胞NF-κB蛋白表达比高糖组和高糖+LPS组均明显降低(P<0.01),中、小剂量组足细胞NF-κB蛋白表达比高糖组和高糖+LPS组均降低(P<0.05),糖肾平胶囊大、小剂量组Smad7蛋白表达比高糖组和高糖+LPS组均明显升高(P<0.01).结论:糖肾平能够降低足细胞TGF-β1、NF-κB蛋白的表达,增加Smad7蛋白表达,通过干预TGF-β1-smad7-NF-κB信号转导通路减少糖尿病肾病足细胞凋亡,可能是其防治糖尿病肾病的作用机制之一.     

某球团厂职业病危害控制效果评价

目的对某球团厂职业病危害控制效果进行评价。方法对作业现场采用现场职业卫生学调查和检测分析方法进行评价。结果本次检测粉尘有效数据126个,合格109个;噪声有效数据69个,合格51个;有毒有害物质和高温检测结果均符合国家卫生标准。结论本工程在建设过程中,遵循了国家有关的法律法规,采取了必要的职业病危害防护措施,制定了较为可行的职业卫生管理制度,除粉尘、噪声外大多数工作岗位职业病控制效果符合相关标准要求。     

米索前列醇与缩宫素治疗宫缩乏力性产后出血的疗效及护理

目的 探究米索前列醇与缩宫素治疗宫缩乏力性产后出血的护理工作.方法 临床记录了92例产后出现宫缩乏力性产后出血症状的病例,随机将其分为治疗组以及对照组两组,各组人数为46人,对照组病例使用缩宫素治疗,治疗组病例使用米索前列醇与缩宫素治疗,并对两组患者进行临床护理,通过测量其产后出血量和两组对比结果,检验试剂疗效.结果 治疗组共治愈病例46例,产后2h内出血量总计342.9mL,对照组共治愈病例36例,产后2h内出血量总计456.6mL.结论 使用米索前列醇与缩宫素治疗护理可促进子宫进行收缩,具有显著的止血效果,但还需要医护人员精心的护理作为辅助.