miRNA-135a在肝癌组织中的表达及临床意义

目的 探讨mi RNA-135a(mi R-135a)在肝癌组织中的表达及其临床意义。方法 采用实时荧光定量PCR检测20例肝癌组织及其癌旁组织中mi R-135a的表达水平,并通过脂质体介导的方法将mi R-135a模拟物(mi R-135a mimics)转染肝癌细胞株Hep G2,采用实时荧光定量PCR测定转染后细胞中mi R-135a的表达水平;通过平板克隆实验和MTT法分别检测转染后细胞克隆形成率和存活率的变化,并对mi R-135a调控相关靶细胞的基因表达水平进行检测,观察mi R-135a在肝癌细胞维持正常功能中的作用。结果 通过对20例肝癌组织及其癌旁组织中mi R-135a的表达水平进行检测,结果 mi RNA-135a的表达在正常组织中相对更高,且两组之间存在显著性差异(P0.05);与阴性对照组比较,转染mi R-135a mimics后Hep G2细胞中mi R-135a表达水平显著提高(P0.05),而形成单克隆能力和细胞存活率均显著下降(P0.05),同时转染组细胞中与mi R-135a细胞调控相关靶基因FOS、PI3、Jak2、Stat3的m RNA表达量相较于NC组均显著降低(P0.05),表明mi R-135a表达提高后抑制细胞形成单克隆能力并降低存活率。结论 mi R-135a在正常组织和肝癌组织中差异表达,同时当mi R-135a表达提高时抑制肝癌细胞形成单克隆能力和降低细胞存活率,表明mi R-135a可能通过一些相关靶基因直接或间接调控Hep G2肝癌细胞的存活,在肝癌的发生过程中可能起到作用,mi R-135a可能成为临床治疗肝癌和预后的重要靶点。     

Simultaneous Subtotal Pancreatectomy and Streptozotocin Injection for Diabetes Modeling in Cynomolgus Monkeys

Background

In an experimental animal model of islet transplantation, stable induction of insulin-dependent diabetes mellitus (IDDM) and islet isolation from donor pancreas are essential. Total pancreatectomy for IDDM induction and islet procurement in nonhuman primates leads to unwanted loss of exocrine function and may lead to morbidities associated with IDDM.

Oxymetazoline: reduction of subconjunctival hemorrhage incidence after intravitreal injections

ObjectiveSubconjunctival hemorrhage (SCH) is an important minor side effect that might affect patient compliance to antivascular endothelial growth factor (anti-VEGF) intravitreal injection treatment (IVI). We sought to compare SCH incidence and pain score responses after topical oxymetazoline in naïve patients undergoing a single IVI of ranibizumab for diabetic macular edema.MethodsProspective, randomized, double-blinded, single centre study. One hundred two patients naïve to anti-VEGF were assigned to receive either topical oxymetazoline or placebo 30 minutes before IVI. SCH incidence and area were measured by slit lamp 24 hours after, and pain was evaluated 5 minutes and 24 hours after.ResultsSCH incidence was reported on 72% in control group versus 51% in oxymetazoline group (p = 0.037). Mean size of SCH was 16.82 mm² in control group versus 12.55 mm² in oxymetazoline group (p = 0.394). Prevalence of local pain in the overall study population was 60%. No significant statistical difference was achieved between groups 5 minutes or 24 hours after IVI in either pain scale evaluation.ConclusionAdministration of topical oxymetazoline 30 minutes before IVI is a single, harmless, cost-effective intervention that decreases the incidence of subconjunctival hemorrhage. This may considerably improve patient treatment satisfaction and promote compliance to IVI therapy.     

Changes in the PGC-1α and mtDNA copy number may play a role in the development of pelvic organ prolapse in pre-menopausal patients

ObjectiveThe alternations of mtDNA may play an important role in the molecular pathogenesis and process of Pelvic Organ Prolapse (POP) formation in both pre-menopausal and post-menopausal women. The aim of the present study is to analyze the association between the mitochondrial biogenesis gene and development of POP in the uterosacral ligaments (UL) of pre-menopausal women.Materials and methodsSeventy one pre-menopausal women, all below 52 years of age, were enrolled in this study. UL biopsies were obtained from uterine specimens taken from 33 women with POP (n = 33, study group) and 38 myoma patients without POP (n = 38, control group). Quantitative Real-Time PCR was performed to measure mitochondrial DNA (mtDNA) copy number and mtDNA⁴⁹⁷⁷. Western blotting and immunohistochemistry were used to assess the protein expression of PGC-1α, TFAM, NRF-1 and NRF-2. Statistical analysis was performed using SPSS statistical software and the Mann–Whitney U test, and the continuous variables were analyzed using the Student's t-test in demographic data.ResultsThere were no significant differences in the patient demographics between the two groups (p > 0.05). The mtDNA copy number in the UL of pre-menopausal patients with prolapse was significantly higher than that in the no prolapse group (p = 0.008). There were no significant differences between the mtDNA⁴⁹⁷⁷ of the POP and non-POP groups, but a significantly higher expression of PGC-1α in the POP group compared to the non-POP group (1.59 ± 1.30 v.s. 0.66 ± 0.53; p = 0.036). The expression of TFAM in the POP group was higher than in the non-POP group). There was no significant difference in the TFAM(p = 0.377), NRF-1 and NRF-2 expression between the POP and non-POP groups (p = 0.647; p = 0.682).ConclusionsChanges in the PGC-1α and mtDNA copy number may play a role in the development of Pelvic Organ Prolapse in pre-menopausal patients.     

"一箭双星法"构建Flt3转基因细胞株

目的构建稳定表达Flt3分子的转基因细胞株。方法将Flt3基因重组入逆转录病毒载体pEGZ-term,通过293T细胞的包装获得具有感染能力的完整重组病毒载体,进而采用“一箭双星法”即同时感染BaF和L929细胞,构建Flt3转基因细胞株。结果成功获得稳定表达Flt3的转基因细胞株BaF/Flt3和L/Flt3。结论采用“一箭双星法”成功构建Flt3转基因细胞株,为以Flt3为靶分子的研究奠定了物质基础,也为类似的高难度的转基因细胞株的构建提供了有价值的经验。     

血清miR-135、miR-601、CA72-4及CA19-9的表达水平与胃癌诊断的相关性

目的 探究血清miR-135、miR-601、糖类抗原72-4(CA72-4)及糖类抗原19-9(CA19-9)的表达水平与胃癌(GC)诊断的相关性.方法 选取2015年1月至2020年10月本院106例GC患者作为观察组,健康人群45例作为对照组,检测并比较两组血清miR-135、miR-601、CA72-4及CA1...     

健康人群流脑Y群和W135群抗体水平分析

目的了解安徽省合肥市健康人群Y群和W135群流脑抗体水平,预测流脑疫情。方法2008年9-10月,在合肥市采用分层随机抽样方法调查健康人群1184人,并采集血清,采用酶联免疫吸附试验(ELISA)检测Y群和W135群流脑抗体水平。结果调查1184人中,Y群流脑抗体阳性率为61.8%,几何平均浓度(GMC)为2.33μg/mL;W135群流脑抗体GMC为1.32μg/mL,阳性率为20.9%;抗体几何平均浓度农村和城市、性别间比较,差异均无统计学意义,各年龄段抗体水平差异有统计学意义。结论合肥市健康人群流脑Y群和W135群抗体水平总体不高,有计划地在人群中接种含有W135群和Y群的流脑疫苗是必要的。     

miR-135a/b逆转肺癌A549/CDDP细胞对顺铂耐药性及相关机制研究

目的:研究miR-135a/b对肺癌耐顺铂细胞株A549/CDDP顺铂耐药的影响?方法:运用实时荧光定量PCR检测miR-135a/b在A549和A549/CDDP 细胞株中的差异表达;MTT法检测转染后A549及A549/CDDP细胞对CDDP的敏感性;构建MCL1-3′-UTR荧光素酶报告质粒验证miR-135a/b的靶基因;Western blot检测转染前后细胞MCL1蛋白的表达差异;流式细胞术检测转染后耐药细胞对顺铂诱导凋亡的影响?结果:miR-135a/b在A549/CDDP细胞中表达量降低;在耐药株中上调miR-135a/b后显著增加细胞对顺铂的敏感性;荧光素酶实验证实MCL1是miR-135a/b的靶基因;抗凋亡蛋白MCL1在A549/CDDP细胞中呈高表达,上调miR-135a/b明显抑制耐药细胞中MCL1蛋白的表达;miR-135a/b显著增加A549/CDDP细胞对顺铂诱导的凋亡?结论:miR-135a/b通过靶向调控MCL1蛋白表达增加NSCLC细胞对顺铂的敏感性和凋亡?