Gestrinone inhibits growth of human uterine leiomyoma may relate to activity regulation of ERα, Src and P38 MAPK

The study was to investigate the effect of gestrinone on the growth of human uterine leiomyoma cells and on the levels and activity of p38, Src and estrogen receptor alpha (ERα). Human uterine leiomyoma cells were cultured and treated with dimethylsulfoxide (DMSO) or a gestrinone concentration gradient. Morphological changes were observed and apoptosis was evaluated. Levels of p38 and phosphorylated-p38 (pp38) were assayed by enzyme-linked immunosorbent assay (ELISA). Levels of ERα and Src were analyzed using real-time RT-PCR and Western blotting. The result showed that gestrinone significantly inhibited the growth of cultured human uterine leiomyoma cells in a concentration- and time-dependent manner, with a 50% inhibitory concentration (IC₅₀) value and corresponding 95% confidence intervals (CI) of 43.67 (23.46∼81.32), 27.78 (12.51∼61.68) and 15.25 (7.17∼32.43) μmol/L at 20, 40 and 60 h, respectively. Compared with control-treated leiomyoma cells, gestrinone significantly reduced both the expression of ERα (P < 0.05) and the levels of phospho-Ser167-ERα (P < 0.05). Gestrinone also markedly suppressed the level of phospho-Tyr416-Src (P < 0.05). Moreover, gestrinone significantly increased the ratio of phospho-p38/p38 mitogen-activated protein kinase (MAPK) (P < 0.05). However, no significant increase in apoptosis or cell cycle arrest was observed (P > 0.05) in response to the tested concentrations of 0.1 to 3.0 μmol/L. As a conclusion, gestrinone suppresses the proliferation of uterine leiomyoma cells mainly by regulating the activity of ERα/Src/p38 MAPK in a concentration-dependent manner at a low concentration of 0.1∼3.0 μM, but not significantly regulating apoptosis. Gestrinone opposes the growth of uterine leiomyoma through multiple genes.     

两种方法对上海及周边地区实验大小鼠螺杆菌携带情况的调查

目的了解上海及周边地区实验小鼠、大鼠螺杆菌携带情况,为我国实验动物等级及监测标准的制定提供参考和依据。方法 PCR法共检测了352只小鼠(清洁级101只,SPF级251只),101只大鼠(清洁级69只,SPF级32只);ELISA法共检测了88只小鼠(清洁级26只,SPF级62只),165只大鼠(清洁级84只,SPF级81只);并对其中88只小鼠、101只大鼠的PCR和ELISA法阳性检测率进行比较。结果 PCR法检测小鼠平均阳性率为35.8%(126/352),清洁级阳性率为51.5%(52/101),SPF级阳性率为29.5%(74/251);大鼠平均阳性率为70.3%(71/101),清洁级阳性率为69.6%(48/69),SPF级阳性率为71.9%(23/32);ELISA法检测小鼠平均阳性率为15.9%(14/88),清洁级阳性率为19.2%(5/26),SPF级阳性率为14.5%(9/62);大鼠平均阳性率为52.7%(87/165),清洁级53.6%(45/84),SPF级51.9%(42/81);88只小鼠PCR法阳性检测率为72.7%(64/88),ELISA法阳性检测率为15.9%(14/88);101只大鼠PCR法阳性检测率为70.3%(71/101),ELISA法阳性检测率为49.5%(50/101)。结论上海及周边地区实验大鼠、小鼠中皆存在着不同程度的螺杆菌感染,两种方法阳性检出率比较结果表明回盲部内容物PCR法较检测血清中抗螺杆菌抗体ELISA法更为敏感。     

反相高效液相色谱法测定盐酸美普他酚(2-氨基-6-甲基)-苯甲酸酯的含量

目的 建立反相高效液相色谱法(reversed phase-high performance liquid chromatography,RP-HPLC)测定盐酸美普他酚(2-氨基-6-甲基)-苯甲酸酯的含量。方法 采用C18(4.6 mm×150 mm,5 μm)色谱柱,0.02 mol/L醋酸铵水溶液(氨水调节pH...     

蓝氧疗法治疗生殖道感染的可接受性分析

目的:借鉴卫生技术评估原理,分析蓝氧疗法治疗生殖道感染的可接受性,分析技术应用前景,为技术推广提供依据。方法:应用流行病学、卫生技术评估方法对蓝氧疗法的可接受性进行分析,采用Fisher确切概率法和logis-tic回归分析法进行单因素和多因素分析。结果:研究对象听说过蓝氧疗法、曾经接受过相关治疗、愿意向有生殖道感染治疗需要的亲友推荐该种治疗方法的比例较高,均达到了80%以上,接受过治疗者更倾向于向亲友推荐蓝氧疗法(OR=18.59,P<0.01);在接受过蓝氧疗法的419位研究对象当中,认为候诊不需要等待和等待时间<10min的所占比例最大(42.72%和42.96%)。结论:服务对象蓝氧疗法的接受和推荐意愿较高,具有一定的推广价值。技术方法引入和推荐过程早期应针对服务对象开展宣教和咨询,减少服务对象的顾虑。     

出生前低于100 μg/L血铅暴露对婴儿发育的影响

【目的】 探讨出生前100 μg/L以下剂量铅暴露对婴儿6月龄时智力和行为发育的影响。 【方法】 以出生前孕早期和晚期孕妇血铅低于100 μg/L的婴儿为研究对象,在其6月龄时用Bayley婴幼儿发育量表评价智力发育和精神运动发育。根据孕早期和晚期血铅的P25、P50和P75为界值,将婴儿分为相对高、中、低铅组,比较不同组间智力(mental development index, MDI)和行为发育指数(psychomotor development index, PDI)差异。 【结果】 婴儿6月龄时MDI和PDI均随出生前血铅水平的升高呈现下降趋势。以P25和P50为界值分组时,相对高铅组婴儿PDI均低于相对低铅组,且差异具有统计学意义(P<0.05);以P75为界值时,组间婴儿PDI未见明显差异。各分组间婴儿MDI差异均无统计学意义(P>0.05)。纳入孕妇年龄、文化因素分析发现,孕早期和晚期血铅在P50(31.15 μg/L和37.58 μg/L)以上的婴儿其PDI较其他婴儿PDI低4.48分;孕早期和晚期血铅水平在P25(24.0 μg/L和29.8 μg/L)以上的婴儿,其PDI较其他婴儿PDI低6.51分,差异均有统计学意义。 【结论】 出生前100 μg/L剂量以下铅暴露对婴儿发育有影响,特别是对婴儿6月龄时PDI影响更为显著。     

不同干预方案对0~3岁婴幼儿早期综合发展能力的影响

目的 了解不同干预模式对0~3岁婴幼儿早期综合发展能力的影响,为开展儿童早期综合发展工作提供科学依据。方法 2018年9月选取295名婴幼儿为研究对象,根据干预模式的不同分为对照组(n=97),家庭干预组(n=100)和社区干预组(n=98)。由专业人员借助早期教育测评系统(E-LAP)和教育测评诊断系统(LAP-D)两种测评工具分别对干预前后婴幼儿综合发展能力进行测评,并以“测评发育月龄≥实际月龄的比例”作为主要评估指标,评估干预效果。结果 婴幼儿接受家庭干预前后,大运动、精细动作、认知、语言和社交情绪方面“测评发育月龄大于或等于实际月龄的比例”差异有统计学意义(χ²=39.111,27.604,30.083,12.562,13.657,P＜0.05);社区干预组仅在大运动和语言两个方面差异有统计学意义(χ²=4.015,5.227,P＜0.05);对照组在大运动方面差异有统计学意义(χ²=7.009,P＜0.05)。调整婴幼儿年龄、母亲年龄、母亲文化程度和父亲文化程度后的广义估计分析显示,与对照组相比,家庭干预组在大运动、精细动作和认知方面,大于或等于实际月龄的比例较高,且差异有统计学意义(OR_大动作=1.859,OR_精细=2.942,OR_认知=1.813,P＜0.05);社区干预组仅在大运动方面与对照组差异有统计学意义(OR_大运动=1.751,P＜0.05);不同干预方案在语言和社交情绪方面差异均无统计学意义(P＞0.05)。结论 针对0~3岁婴幼儿的早期干预方案,尤其是家庭干预能有效提升早期综合发展能力。     

Prenatal polybrominated diphenyl ethers exposure and anogenital distance in boys from a Shanghai birth cohort

Background

Polybrominated diphenyl ethers (PBDEs) are major brominated flame retardant (BFR) chemicals with endocrine-disrupting properties. One small-scale study on humans has suggested that prenatal exposure to PBDEs is adversely related to anogenital distance (AGD) a sensitive marker for prenatal androgen exposure. The aim of the present study was to examine the associations between prenatal exposure to PBDEs and AGD among boys 0–4 years of age in a cohort study.

链状酰胺类化合物B07的体外杀精效果及其对精子质膜的影响

目的:研究一种链状酰胺类化合物(B07)的体外杀精作用及其对精子质膜的影响。方法:上游收集高活力人类精子分别与0μg/ml(对照组),5~640μg/ml B07作用30 min,随后用计算机辅助精液分析仪分析记录精子的活率及运动参数;用160μg/ml B07与精子作用,记录5 min、30 min、60 min和120 min时精子活动率;处理后的精子一部分经SYBR-14/PI双染后用荧光显微镜观察,另一部分通过电子显微镜来观察质膜的变化情况;并以壬苯醇醚(N9)作为阳性对照。结果:随着B07浓度的升高,精子活率和活力呈下降趋势,最低有效浓度(MEC)为640μg/ml;荧光显微镜下经B07处理的精子呈橙色,而N9处理的精子呈红色;电子显微镜显示B07组精子头部肿胀起泡,尾部针孔样损伤,N9组精子呈溶解性改变。结论:B07具有体外杀精作用,且该作用有时间和浓度依赖性,且其对精子质膜的影响小于N9。     

An epididymis-specific carboxyl esterase CES5A is required for sperm capacitation and male fertility in the rat

Despite the fact that the phenomenon of capacitation was discovered over half century ago and much progress has been made in identifying sperm events involved in capacitation, few specific molecules of epididymal origin have been identified as being directly involved in this process in vivo. Previously, our group cloned and characterized a carboxyl esterase gene Ces5a in the rat epididymis. The CES5A protein is mainly expressed in the corpus and cauda epididymidis and secreted into the corresponding lumens. Here, we report the function of CES5A in sperm maturation. By local injection of Lentivirus-mediated siRNA in the CES5A-expressing region of the rat epididymis, Ces5a-knockdown animal models were created. These animals exhibited an inhibited sperm capacitation and a reduction in male fertility. These results suggest that CES5A plays an important role in sperm maturation and male fertility.