雌性川金丝猴尿液中雌二醇与孕酮水平的季节性变化

目的通过测定不同季节雌性川金丝猴尿液中的雌二醇与孕酮水平，对不同时期雌性川金丝猴的繁殖力进行评价。方法应用放射免疫方法测定尿液中的雌二醇与孕酮水平。结果在非繁殖季节，滤泡期与黄体期雌二醇的基础分泌水平分别为8．151和19．758pg／mgCr，峰值为89.038pg／mgCr；孕酮在滤泡期与黄体期的基础分泌水平分别为0．118和0．481ng／mgCr，峰值为1．094ng/mgCr。在繁殖季节，滤泡期与黄体期雌二醇的基础分泌水平分别为587．902和1776．447pg／mgCr，峰值为6673．185pg／mgCr，分别是同一个体在非繁殖季节的72、13，89．91和74．95倍；孕酮在滤泡期与黄体期的基础分泌水平分别为28、935和162．054ng／mgCr，峰值为964、650ng／mgCr，分别是同一个体在非繁殖季节的245．21，336．91和881．76倍。结论雌二醇与孕酮的分泌水平具有显著的季节性差异，这可能是其性欲、性交频次和雌猴受孕几率所呈现季节性差异的内在原因之一。     

过期妊娠胎盘绒毛的初步体视学研究

用英国Ｃａｍｂｒｉｄｇｅｑｕａｎｔｉｍｅｔ５２０（＋）［Ｑ５２０（＋）］图像分析仪分别对４０、４１、４２周各８例胎盘绒毛进行初步体视学研究，测定其结构参数并计算其密度参数，形状参数及分布参数，所得各组结果虽然不同，但其组间差异并无显著性（Ｐ＞０．０５），提示过期妊娠与足月妊娠相比．胎盘绒毛本身形态定量变化只是程度不同，无明显界线。在观察了３组胎盘绒毛内部结构的病理变化基础上，发现过期妊娠并发症与绒毛本身定量的形态改变并无直接关系，而可能与绒毛内部结构的形态变化有关。     

奶山羊初乳孕酮和17β—雌二醇的含量及注射初乳对乳中激素水平的影响

应用放射免疫分析法(Radioimmunoassay.RIA),首次测定了14只西农萨能奶山羊初乳中17β—雌二醇(17β—E_2)和孕酮(P_4)的水平。结果表明,分娩0时17β—E_2含量最高(549.05±156.51pg/ml),为10天后均值的12.2倍;分娩后最初6小时17β—E_2水平波动在549.05—408.01pg/ml的范围内,然后陡然下降;2天后下降幅度逐渐减慢,到分娩5天以后,下降到较低水平。P_4的水平在分娩0时为1.883±0.937ng/ml,分娩后最初2天下降较快,随后逐渐变慢,6天后维持在0.7—0.8ng/ml的水平。用山羊初乳对12只西农萨能奶山羊实施颈部皮下注射。结果表明,与注射0天比较,注射后P_4水平立即下降,持续13天。其中第1、5、6、12天显著下降(P<0.05),其余9天均值下降到注射0天均值的80.3％,而对照组无变化(P>0.10)。17β—E_2水平变化不显著(P>0.05)。注射初乳后最初13天,注射组的17β—E_2/P_4的比值极显著地高于对照组(P<0.001)。以上研究结果表明,奶山羊初乳中17β—E_2和P_4水平的分泌范型与牛类似;给奶山羊注射初乳后,能引起其乳汁P_4水平下降和17β—E_2/P_4比值升高,但显示不出诱导发情的作用。     

卵巢囊肿奶牛乳汁孕酮和17β-E_2水平研究

采用放射免疫分析法测定了12头卵巢囊肿奶牛(其中卵泡囊肿8头,黄体囊肿4头)脱脂乳中孕酮和17β一雌二醇水平。结果卵泡囊肿奶牛脱脂乳中孕酮和17β一雌二醇水平分别为0.46±0.31ng/ml和26.33±12.44pg/ml;黄体囊肿奶牛脱脂乳中孕酮和17β一雌二醇水平分别为3.46±1.79ng/ml和8.25±1.35pg/ml。结果还表明,卵巢囊肿奶牛通过测定脱脂乳中孕酮水平可作出准确诊断,孕酮水平大于1ng/ml为黄体囊肿,小于1ng/ml为卵泡囊肿;卵泡囊肿奶牛脱脂乳中17β一雌二醇水平较高,且和病程长短有关。     

促排卵周期血清雌二醇比值及孕酮／雌二醇比值与体外受精-胚胎移植妊娠率的关系

目的探讨促排卵周期血清雌二醇（E2）比值及孕酮／雌二醇（P/E2）比值与体外受精-胚胎移植（IVF-ET）妊娠率的关系。方法接受常规体外受精胚胎移植术的不孕患者695例,于HCG日、移植前1d、移植第7d检测血清E2水平;移植第7d同时检测血清P水平。分别比较HCG日E2与移植前1dE2的比值、HCG日E2与移植第7dE2的比值、移植第7dP的绝对值及P/E2的比值与妊娠率的关系。结果HCG日E2与移植前1d E2的比值与妊娠率无相关性;HCG日E2与移植第7dE2的比值与妊娠率呈负相关性,比值越高妊娠率越低,有显著性差异;移植第7dP/E2的比值与妊娠率呈负相关性,比值越高妊娠率越低,有显著性差异。结论在IVF周期中,HCG日E2与移植第7dE2的比值、移植第7d孕雌激素比值可以作为预测IVF妊娠结局的指标之一。     

干扰素—γ对妊娠小鼠黄体细胞孕酮分泌的影响

采用妊娠小鼠黄体细胞离体培养的方法,研究了外源的干扰素－γ（ＩＮＦ－γ）对妊娠小鼠黄体细胞孕酮分泌的影响．结果表明：ＩＦＮ－γ对妊娠小鼠黄体细胞分泌孕酮有显著作用,在一定剂量范围内,ＩＦＮ－γ有促黄体作用,但当ＩＦＮ－γ大量存在时,对孕酮分泌又有一定的抑制作用．     

不同浓度尼古丁对大鼠黄体细胞分泌雌二醇和孕酮的影响

为了研究不同浓度尼古丁对大鼠卵巢黄体细胞存活情况、在有无hCG支持下分泌孕酮、雌二醇的影响 ,将妊娠第 4天的母鼠卵巢中取出的黄体细胞培养于含 5 %胎牛血清的M199培养基中 ,放置于 37℃、5 %CO2 、饱和湿度的培养箱中培养 .大鼠黄体细胞培养 1～ 2小时后 ,分组加入尼古丁生理盐水溶液 ,最终浓度为 :4mg mL、0 4mg mL、0 0 4mg mL、0 0 0 4mg mL、0 0 0 0 4mg/mL ,将大鼠黄体细胞分为两组 ,一组为基础分泌组 ,另一组为hCG刺檄组 .在大鼠黄体细胞受尼古丁作用 4小时后 ,吸取培养液上清部分以放射性免疫法测定孕酮和雌二醇的含量 ,同时用MTT比色法测定黄体细胞存活情况 .结果发现 ,大鼠黄体细胞在有无hCG的刺激下 ,孕酮 ,雌二醇的分泌量均是随着加药浓度的增加而增加 ,大致呈线形关系 ,但其基础分泌量远远小于hCG刺激下的激素分泌量 .     

HSP70在肺癌组织中表达水平的研究

采用免疫组织化学ＳＡＢＣ法检测３９例肺部组织中ＨＳＰ７０的表达。结果显示：ＨＳＰ７０在高度分化的肺鳞癌和肺腺癌细胞中的阳性表达率与癌旁正常肺组织之间具有高度显著性差异（Ｐ〈０．０１）,ＨＳＰ７０的表达在高分化的肺鳞癌与肺腺癌之间则无显著性差异（Ｐ〉０．０５）,在低分化的肺鳞癌和肺腺癌组织中,ＨＳＰ７０呈阴性反应,ＨＳＰ７０在肺癌组织中表达水平的高低与肺癌细胞的分化程度密切相关,而与肺癌的组织学类型     

放射免疫测定毛发中激素含量作为研究动物内分泌生理方法的初步研究

本文应用放射免疫分析法测定日本大耳白兔和狗毛中孕酮和雌二醇的含量,结果表明:取200mg毛样加入4ml石油醚对孕酮进行提取,毛样提取液为0.01～ 0.50ml时,孕酮含量呈对数相关;而在0.01～0.20ml时,孕酮含量基本上呈线性相关.兔子腹部乳头周围毛样的孕酮含量显著高于背部毛样.注射外源性孕酮后,毛中孕酮的峰值出现较血浆中晚12h左右.毛样在18℃室温下保存10天对孕酮含量无影响.     

聚联苯乙烯和石墨化碳黑固相萃取用于污水中雌激素的定量分析

研究了聚联苯乙烯(SDB)和石墨化碳黑(GCB)固相萃取用于样品前处理对污水样中雌二醇(E2)和乙炔基雌二醇(EE2)的酶联免疫吸附检测(ELISA)定量分析可靠性的影响.采用GCB固相萃取可对E2和EE2进行分步洗提,相比SDB固相萃取在污水厂原水样中E2和EE2的加标回收率分别从181.4%和122.6%降至113.3%和109.4%,相对标准偏差均降至10.0%以下;在污水厂尾水样中E2的加标回收率则分别从144.2%降至93.5%,而EE2无明显变化,相对标准偏差均从接近10.0%降至8.0%以下.利用液相色谱-飞行时间质谱联用对污水厂原水样的平行分析的结果表明采用GCB固相萃取可比采用SDB固相萃取降低38%的E2检测假阳性和15%的EE2检测假阳性.     

Effect of prolonged isothermal heat treatment on the mechanical behavior of advanced NANOBAIN steel

The microstructural evolution and consequent changes in strength and ductility of advanced NANOBAIN steel during prolonged isothermal heat-treatment stages were investigated. The microstructure and mechanical properties of nanostructured bainite were not expected to be influenced by extending the heat-treatment time beyond the optimum value because of the autotempering phenomenon and high tempering resistance. However, experimental results indicated that the microstructure was thermodynamically unstable and that prolonged austempering resulted in carbon depletion from high-carbon retained austenite and carbide precipitations. Therefore, austenite became thermally less stable and partially transformed into martensite during cooling to room temperature. Prolonged austempering did not lead to the typical tempering sequence of bainite, and the sizes of the microstructural constituents were independent of the extended heat-treatment times. This independence, in turn, resulted in almost constant ultimate tensile strength values. However, microstructural variations enhanced the yield strength and the hardness of the material at extended isothermal heat-treatment stages. Finally, although microstructural changes decreased the total elongation and impact toughness, considerable combinations of mechanical properties could still be achieved.     

米索前列醇用于足月妊娠引产安全性分析

观察米索前列醇用于足月妊娠引产的安全性．方法；回顾性分析了72例使用米索前列醇引产和100例使用缩宫素引产的足月妊娠产妇的临床资料．结果：米索组出现过频宫缩14例，而缩宫素组未出现异常宫缩．两组羊水混浊发生率分别为22％、l0％，差异有显著性．剖宫产原因中，胎儿宫内窘迫均为两组主要手术指征，米索组8例占66．7％，缩宫素组7例占44％，差异有显著性，提示：米索前列醇用于足月妊娠引产，对母亲和胎儿有潜在的不安全因素存在．     

妊娠梅毒的研究进展

梅毒可通过性接触水平传播,也可通过胎盘经血液垂直传播。妊娠期梅毒的流行与孕妇文化程度、年龄、职业有关。梅毒发病率不断上升,发达国家地区发病率低于发展中国家,我国东南沿海城市是梅毒发病率较高地区。妊娠期梅毒的治疗要早期进行,用药要足量。     

应用米索前列醇与利凡诺中期妊娠引产的效果对比分析

将70例妊娠(16～24)周有引产指针的孕妇随机分成两组实验组30例，阴道置米索前例醇100μg;对照组40例，羊膜腔内注射利凡诺100mg，用药前后行宫颈Bishop评分，比较两组宫颈成熟度评分、引产有效率、产程长短、分娩情况及产后清宫率。结果表明末次用药12h内，实验组宫颈评分平均升高(3．6±1．09)分，明显高于对照组(平均升高(2．6±1．04)分)(P＜0．05);末次用药至正规宫缩时间，实验组为(9．25±4．56)h，较对照组为(36．42±5．67)h，前者比后者明显缩短(P＜0．01);总产程，实验组为(12．50±2．06)h，对照组为(42．56±5．42)h前者明显短于后者(P＜0．01)；产后清宫率，实验组为26．27％，较对照组为80％，前者比后者明显降低(P＜0．01)；引产有效率、产后出血、软产道损伤两组间无显著性差异(P＜0．05)。     

米非司酮对晚孕大鼠肾超微结构的影响

目的 :探讨米非司酮对晚孕大鼠肾超微结构的影响。方法 :将妊娠 2 0dWistar大鼠 10只 ,随机分实验组与对照组 ,每组各 5只 ,灌胃法饲予实验组米非司酮 (11 5± 1 0 )mg /只 ,对照组每只给予食用麻油 1mL ,分娩后处死大鼠 ,取右侧肾脏作电镜观察。结果 :与对照组相比 ,实验组肾小体无明显改变 ,大部分肾小管上皮正常 ,局部肾小管上皮细胞出现胞质水肿 ,线粒体肿胀 ,嵴断裂 ,肾间质水肿增宽 ,间质细胞肿胀 ,甚至出现胞膜破裂、染色质边聚、核浓缩等坏死性改变。结论 :单剂量米非司酮用于晚孕引产可造成大鼠肾组织损伤。     

Interfamily pregnancy and expression of CD57, CD68 in deciduas between golden hamster and mouse

Pregnancy between different species is one of the key steps to interspecific somatic cell cloning. Although interspecific clone embryos have been constructed, they could not develop to birth after being transferred to recipi-ents. In order to clarify the mechanism of this phenomenon, interfamily pregnancy between golden hamste (Mesocricetus auratus) and mouse (Mus musculus) was studied. Co-culture results indicated that the adhesion ratios of golden hamster blastocysts on mouse uterine epithelia monolayer 12, 24, 48 and 72 h after co-culture were all significantly lower than those of mouse blastocysts. The outgrowth ratios of golden hamster blastocysts on mouse uterine epithelia monolayer 48, 72 h after co-culture were both significantly lower than those of mouse blastocysts (P < 0.01). Golden hamster抯 blastula could be implanted and develop to D 11 of pregnancy after being transferred to mouse uterus (the 7th day after embryo transfer). Compared to the transfer of mouse embryo to mouse uterus, the successful ratio of interfamily embryo transfer was lower and the bulk of fetus was smaller than that of intraspecific fetus. Compared to intraspecific preg-nancy of mouse, the remote decidual tissue of interfamily pregnancy on D8 is looser. At the same time, expressions of CD57 and CD 68 in remote deciduas were both higher than those in the secondary deciduas in both intraspecific and interfamily pregnancy. However, expressions of the two molecules in interfamily pregnancy were lower than those in intraspecific pregnancy. These results showed that interfam-ily pregnancy could be established between golden hamster and mouse. But the development of fetus in interfamily pregnancy was slower than that in intraspecific pregnancy. The expression difference of CD57 and CD68 indicates the difference of immunoreaction between interfamily and in-traspecific pregnancy, which may be one of the reasons lead-ing to interfamily pregnancy termination.