人乳头瘤病毒16型 E7蛋白在子宫颈癌细胞内的定位

应用重组质粒在大肠杆菌中表达人乳头瘤病毒(HPV)16 型 E7 基因.以所产生的 E7 融合蛋白为抗原免疫家兔,制得抗 E7 蛋白抗血清.在子宫颈癌组织切片中用此抗血清作免疫组化染色(胶体金标记染色法).在光学显微镜下可观察到癌细胞中存在 E7 抗原黑色颗粒,位于细胞核内.主要附着于核膜,可证明 E7 基因在 HPV16 感染的子宫颈癌细胞中有强烈表达;提示 E7 基因可能即为 HPV16的癌基因.     

AIMS65评分联合血清GAS、PGE2、BAR对急性非静脉曲张性上消化道出血患者预后的评估价值

摘要 目的：探讨AIMS65评分联合血清胃泌素（GAS）、前列腺素E₂（PGE₂）、血尿素氮/白蛋白比值（BAR）对急性非静脉曲张性上消化道出血（ANVUGIB）患者内镜下止血治疗后预后的评估价值。方法：选取2020年5月～2022年5月北京市和平里医院消化内科收治的108例的ANVUGIB患者,根据患者住院28 d内的预后分为预后不良组和预后良好组。收集患者临床资料,检测血清GAS、PGE₂水平和计算AIMS65评分、BAR。采用单因素和多因素Logistic回归分析ANVUGIB患者内镜下止血治疗后预后不良的影响因素,受试者工作特征（ROC）曲线分析AIMS65评分、GAS、PGE₂和BAR对ANVUGIB患者内镜下止血治疗后预后不良的评估价值。结果：108例ANVUGIB患者预后不良发生率为37.96％（41/108）。单因素分析显示,预后不良组年龄大于预后良好组,心率、休克指数、AIMS65评分、GAS、BAR高于预后良好组,PGE₂水平低于预后良好组（P均＜0.05）。多因素Logistic回归分析显示,年龄增加和休克指数、AIMS65评分、GAS、BAR升高为ANVUGIB患者内镜下止血治疗后预后不良的独立危险因素,PGE₂升高为其独立保护因素（P均＜0.05）。ROC曲线分析显示,AIMS65评分联合GAS、PGE₂和BAR评估ANVUGIB患者内镜下止血治疗后预后不良的曲线下面积大于AIMS65评分、GAS、PGE₂和BAR单独评估。结论：预后不良的ANVUGIB患者AIMS65评分、GAS、BAR均高于预后良好的患者,AIMS65评分联合GAS、PGE₂和BAR评估ANVUGIB患者内镜下止血治疗后预后的价值较高。     

孕素1号引起的家兔子宫液甾体与子宫球蛋白的变化

孕素1号是一个有效的抗着床制剂,临床与动物研究均已证实排卵前服用具有显著的抗着床效果(杨以谦等,1982;吴剑芬等,1982)。以前的工作初步分析了该药的抗着床机制,表明孕素1号可引起子宫内膜早熟与子宫球蛋白提早分沁(杨以谦等,1979,1981,1983)。 本工作的目的为进一步研究假孕家兔的内膜分沁,分析在正常时与孕素1号作用下,子宫液中一些主要成分,如甾体激素与蛋白的变化,为了解子宫环境因子在胚泡着床中的作用提供一定资料。     

Effects of ovarian hormones on cell membranes in the rat uterus

Histochemical techniques, including radioisotope histochemistry, have been used to investigate the nature of the surface carbohydrates at the apex of cells of the luminal epithelium of the rat uterus under various hormonal conditions. Binding of ruthenium red was quantitatively similar in ovariectomized rats without further treatment and in those given three daily injections of progesterone. Ruthenium red binding was significantly lower after 3 days treatment with estradiol, and also after 3 days treatment with progesterone with an additional dose of estradiol on day 3, a regime known to produce an epithelium receptive to the implanting blastocyst. Binding of concanavalin A (con A), whether studied by electron microscope histochemistry after incubation of tissue with con A-horseradish peroxidase, or by light microscope autoradiography after incubation with³H-con A, was not statistically different in any of the four groups of rats. The results with ruthenium red show a reduction in net negative charge of the carbohydrates on the apical cell membrane in conditions permitting implantation: this change is not due to variations in the amounts of the neutral carbohydrates, mannose and glucose, as demonstrated by con A.     

Lipopolysaccharide (LPS)-induced intra-uterine fetal death (IUFD) in mice is principally due to maternal cause but not fetal sensitivity to LPS

The present study deals with whether lipopolysaccharide (LPS)-induced intra-uterine fetal death (IUFD) is related to LPS-susceptibility of either mother or fetus and how LPS or LPS-induced TNF causes IUFD. LPS-susceptible C3H/HeN or -hypo-susceptible C3H/HeJ pregnant mice and the mice mated reciprocally with these mice were used on days 14 to 16 of gestation for experiments. All of fetuses in pregnant C3H/HeN mice mated with either C3H/HeN males [HeN(HeN)] or C3H/HeJ males [HeN(HeJ)] were killed within 24 hr when injected intravenously (i.v.) with 50 or 100 microg of LPS. On the other hand, the majority of fetuses in C3H/HeJ females mated with either C3H/HeJ males [HeJ(HeJ)] or C3H/HeN males [HeJ(HeN)] survived when injected i.v. with even 400 microg of LPS. These findings indicate that LPS-induced IUFD depends on the maternal LPS-responsiveness. LPS injected into mothers could pass through placenta to fetuses, since an injection with 125I-labeled LPS or IgG into pregnant mice resulted in considerable levels of radioactivity in fetuses as well as placenta. Cultured peritoneal macrophages derived from F1 mice of HeJ(HeN) or HeN(HeJ) mice, produced nitric oxide (NO) and tumor necrosis factor (TNF) in response to LPS, although the levels of NO and TNF were lower in comparison with those of C3H/HeN macrophage cultures, suggesting a possibility that the fetus as well as F1 cells might be responsible to LPS. LPS-induced IUFD was not blocked by treatment with anti-TNF antibody which inhibited LPS-induced TNF production in pregnant females, although an injection of recombinant TNFalpha instead of LPS could induce IUFD, suggesting that the cause of IUFD cannot be attributed to mother-derived TNF alone. The roles of LPS passed through placenta and LPS-induced mediators on IUFD were discussed.     

UTERINE EFFECTS,EPIGENETICS, AND POSTNATAL SKELETAL DEVELOPMENT IN THE MOUSE

Reciprocal embryo transfer experiments show that skeletal dimensions in adult mice are significantly influenced by the genotype of the female providing the uterine environment in which they were raised. Embryo transfers among C3HeB/FeJ, SWR/J, and the C3SWF, hybrid strain (C3H females x SWR males) permit separation of uterine maternal genotype effects from effects arising from the progeny's own genotype. Many different aspects of adult skeletal form are significantly influenced by uterine genotype and, in some instances, the pattern of these effects correlates with events during skeletal embryology. Analyses involving the highly heterozygous C3SWF₁ strain demonstrate the existence of significant dominance in maternal genes affecting skeletal development in the progeny. Further, there is a large skeletal effect due to progeny heterosis. Uterine Utter size can be manipulated as a nonheritable component of variability in embryo transfer experiments, and it has a large and systemic effect on skeletal growth and morphogenesis that persists in adult mice. Heritable uterine maternal effects are epigenetic interactions during development that can be incorporated into models of evolutionary change to provide a more complete picture of the causal agents producing morphological change.     

Cyto-epitheliochorial placenta of the viviparous lizard Pseudemoia entrecasteauxii: a new placental morphotype

The structural features of the uterine epithelium of the chorioallantoic placenta and omphalloplacenta in the viviparous Australian skink, Pseudemoia entrecasteauxii, were investigated using SEM and TEM techniques. In particular, the structural characteristics that would allow interpretation of function were analyzed, particularly those of gas exchange in the chorioallantoic placenta and histotrophy in the omphaloplacenta. Pseudemoia entrecasteauxii has a complex placenta consisting of a placentome, paraplacentome, and omphaloplacenta. The paraplacentome has a well-vascularized lamina propria in which projecting uterine capillaries displace the overlying uterine epithelial cells, reducing them to attenuated cytoplasmic extensions. Associated cell nuclei and organelles are lost from this region, to provide a capillary lumen to uterine lumen barrier of 0.5-1.0 microm. Hence, the paraplacentome is likely a prominent site for gaseous exchange via simple diffusion. The omphaloplacenta has a similar cytology to that of the placentome, but the uterine epithelial cells are hypertrophied and the apical plasma membrane actively secretes vesicles into the uterine lumen. The omphaloplacenta shows features that are associated with histotrophic transport of nutrients via vesicle secretion, very similar to that of lipid apocrine secretion. The placentome consists of cuboidal cells in the uterine epithelium, with large centrally located nuclei overlying the well-vascularized lamina propria. Although the placentome has a similar cytological structure to that of the omphaloplacenta, granules or active vesicle secretion were not observed. Thus, the placentome may be associated with histotrophy, but not via apocrine secretion. Squamate placentation is epitheliochorial; however, we propose a new term be used to describe the type of placentation in P. entrecasteauxii: "cyto-epitheliochorial," because of the extreme attenuation of uterine epithelial cells of the paraplacentome.     

Mouse Uterine 24p3 Protein as a Suppressor of Sperm Acrosome Reaction

Under in vitro conditions, incubation with 0.3% bovine serum albumin (BSA) and 1.8 mM CaCl₂ induces mouse sperm capacitation and increases the consequential acrosome-reaction. The effect of mouse uterine 24p3 protein on such stimulated sperm has been investigated to understand the biological function of the 24p3 protein. Variations in the intracellular pH (pHi), calcium concentration, cAMP levels and tyrosine phosphorylation in cytosol were determined and on in vitro mouse fertilization was evaluated. The presence of 24p3 protein reduced the response of sperm to BSA and calcium by suppressing the elevation of intracellular pH, calcium uptake, cAMP accumulation and protein tyrosine phosphorylation of BSA/calcium-stimulated sperm and showed inhibitory effect on mouse in vitro fertilization. The results indicated the inhibition of the BSA-stimulated sperm acrosome reaction by 24p3 protein then suppressed sperm fertilization. We suggested that the 24p3 protein acts as an in vitro inhibitor of the acrosome reaction in BSA stimulated sperm and this might be an anti-fertilization factor in vitro.     

鸡输卵管蛋白分泌部前后段的神经支配差异

将ＣＢ－ＨＲＰ分别注入母鸡输卵管蛋白分泌部的前半段和后半段,以研究其神经分布的差异,结果表明,支配前半段与后半段的神经元分布位置和数目均有一定差异。后半段接受来自胸２至腰荐１３（Ｔ２－ＬＳ１３）脊神经节的感觉神经,Ｔ１－ＬＳ１３交感于神经节、内脏神经节和肾上腺神经节的交感神经,盆神经节的副交感神经以及肠神经节的神经。前半段的感觉和交感神经的来源与后半段的基本相同,但前半段的副交感神经主要来自迷走神