蜗牛卵液对小鼠S_(180)肉瘤的抑制作用

[目的 ]探讨蜗牛卵液对小鼠S180 肉瘤的抑制作用 .[方法 ]按标准方法给 4 0只小鼠接种S180肉瘤细胞后 ,随机分成 4个组 ,即对照组 :每日灌胃生理盐水 10mL/kg ;实验 1组 :每日灌胃蜗牛卵液1 5 g/kg ;实验 2组 :每日灌胃蜗牛卵液 3 0 g/kg ;实验 3组 :每日灌胃蜗牛卵液 3 8g/kg ;连续 8d后 ,观察肿瘤质量变化及胸腺 (脾脏 )指数 .[结果 ]每日 1 5 ,3 0 ,3 8g/kg的蜗牛卵液对小鼠S180 肉瘤的生长抑制率分别为 38 2 % ,4 0 5 % ,5 4 4 % ,实验 3组的肿瘤抑制率高于对照组 ,两组间有显著性差异 ;实验2组和实验 3组的胸腺 (脾脏 )指数低于对照组 ,与对照组相比较亦有显著性差异 .[结论 ]蜗牛卵液对小鼠S180 肉瘤有抑制作用 .     

Human sperm chemotaxis: both the oocyte and its surrounding cumulus cells secrete sperm chemoattractants

BACKGROUND: Human sperm chemotaxis to pre-ovulatory follicular fluid is well established in vitro. However, it is not known whether the female's oocyte-cumulus complex secretes sperm chemoattractants subsequent to ovulation (for enabling sperm chemotaxis within the Fallopian tube) and, if so, which of these cell types--the oocyte or the cumulus oophorus--is the physiological origin of the secreted chemoattractant. METHODS: By employing a directionality-based chemotaxis assay, we examined whether media conditioned with either individual, mature (metaphase II) human oocytes or the surrounding cumulus cells attract human sperm by chemotaxis. RESULTS: We observed sperm chemotaxis to each of these media, suggesting that both the oocyte and the cumulus cells secrete sperm chemoattractants. CONCLUSIONS: These observations suggest that sperm chemoattractants are secreted not only prior to ovulation within the follicle, as earlier studies have demonstrated, but also after oocyte maturation outside the follicle, and that there are two chemoattractant origins: the mature oocyte and the surrounding cumulus cells.     

Follicular fluid renin concentration and IVF outcome

Total renin protein concentration (TRC) was measured in stored follicular fluid (FF) samples from 42 women. Samples were selected according to their origin from follicles either without recovered ova ('empty', n = 38) or fertilized but with failed implantation ('failed', n = 36) or successful deliveries ('deliveries', n = 71). Ratios of number of embryos transferred to number of infants delivered were 2:1, 3:1 or 4:2 but 1:1 was not available. Non-parametric testing was applied to FF-TRC, volume and outcome. TRC was significantly higher in the delivery than the failed (P = 0.001) or empty (P = 0.002) categories. Assuming that the range of renin in failed follicles can identify the sub-population of unsuccessful follicles in the delivery category, then elevated FF-TRC was clearly associated with successful outcome. For individual women, the odds of infant delivery increased 17-fold as a function of average FF-TRC between 10,000 and 25,000 microIU/ml. For failed and delivery but not empty follicles, higher renin levels occurred in the smaller follicles, consistent with a burst of renin synthesis associated with the presence of an oocyte. The results suggest that FF-TRC relates to ovum viability with ovarian hyperstimulation and may have predictive use in IVF programmes.     

4种尸食性蝇类卵的表面超微结构

:【目的】明确尸食性蝇类卵的形态 ,以便于在医学和法医学中的应用。【方法】用扫描电镜机观察杭州地区 4种尸食性蝇类卵的形态。【结果】丝光绿蝇、大头金蝇、巨尾阿丽蝇和厩腐蝇卵的超微结构形态各异 ,卵的大小、表面形态、中区、孵出线、卵孔和垂柱皆为重要的鉴别特征。【结论】通过卵壳超微结构可区分常见尸食性蝇类。     

家蝇诱卵器的研制

目的研制安全、高效、环保、无公害的捕蝇诱卵器。方法将筛选出的几种对家蝇有强引诱力的因子相结合,在实验室及野外条件下进行捕蝇诱卵实验,并进一步研制捕蝇诱卵装置。结果黑色与10%NH4HCO3、10%白糖、5%全脂奶粉和0.6%家蝇信息素的新鲜湿麦麸混合物组合后,对家蝇的产卵行为具有极强的引诱力。新研制成的捕蝇诱卵器包括诱蝇盘、捕蝇罩和诱卵物三部分。结论该款捕蝇诱卵器的设计不但能引诱雌蝇前来产卵,还能将诱来产卵的雌蝇捕获,而且对雄蝇也有引诱力,值得推广应用。     

人类性别遗传与精子的类型无关的实验研究

目的通过实验观察LY1014中药混合物对人类受精卵和胚胎干细胞性别发育趋势的影响,并探讨了人类性别遗传与精子之间究竟存在怎样的关系及其人类性别遗传的基本原理。方法按照中医中药的原则,筛选出有效的多种中药,通过水煎并浓缩制成LY1014中药混合物小丸或其他剂型,并按实验设计的要求给准备怀孕的妇女服用,得到婴儿出生的结果和比例,进而利用顺向思维和逆向思维的方法对实验结果进行分析。结果参加实验的50名妇女都产下了男孩,与人类自然对照组相比,实验组具有非常显著性差异（P〈0．001）。结论LY1014中药混合物能够诱导原本向卵巢细胞方向发育的胚胎干细胞向睾丸细胞进行基因表达,朝男性性别方向发育;根据实验结果可以明确推断出：人类性别遗传与精子的类型是没有关系的,精子是唯一的,没有X精子和Y精子之分,而且,携带唯一的一个男性性别基因,因此也没有X染色体和Y染色体之分;同时,利用逆向思维的方法,推断出卵细胞也是携带有一个女性性别遗传基因的,而且,男女性别之间存在着男女性别基因之间的相互转换关系。     

人精子甘露糖受体对地鼠卵母细胞超微结构的影响

目的 研究人精子甘露糖受体(MR)在精卵融合中的作用.方法 去透明带金黄地鼠卵经不同浓度的纯化人精子MR作用后,用透射电子显微镜观察卵母细胞超微结构的变化.结果 MR作用卵母细胞后,卵母细胞内的皮质颗粒(CG)减少,并伴随有CG胞吐现象,同时卵母细胞表面的微绒毛数量减少.结论 MR作用于卵母细胞表面后,可触发CG胞吐,并促使卵母细胞表面微绒毛减少,提示MR在介导精子与卵母细胞识别与融合中起作用.     

Fimbrial Capture of the Ovum and Tubal Transport of the Ovum in the Rabbit, with Emphasis on the Effects of β2-Adrenoreceptor Stimulant and Prostaglandin F2α on the Intraluminal Pressures of the Tubal Ampullae

Purpose: Our purpose was to elucidate the roles of the ampullar and isthmic portions of the oviduct and the effects of drugs on oviductal contractility. Methods: Prostaglandin F ₂ (PGF ₂; Ono Pharmaceuticals, Osaka) and oxytocin (Atonin-O; Teikoku Hormone Manufacturing Co. Ltd., Tokyo) were used to stimulate oviductal contractility, and ritodrine hydrochloride (Utemerin; Solvay-Duphar Corp., Denmark) to inhibit the contractility. Results: Both PGF ₂ and Atonin-O were involved in ovum capture by the ampullar oviduct by stimulating contractility, thus altering the intraductal pressures. Utemerin is effective in inhibiting the enhanced contractility induced by PGF ₂ and Atonin-O. Conclusions: Variations in pressure of the ampullar portion of the oviduct seem necessary for the capture of ova expelled from the ovary. Once in the isthmic portion of the oviduct, transport appears to be under the influence of ciliary activity rather than variations in contractility.     

组织内虫卵免疫酶间接染色法诊断血吸虫病研究初报

本文对检测血吸虫病抗体的组织内虫卵免疫酶间接染色试验进行了现察,证实感染血吸虫的家兔和小白鼠肝组织内虫卵抗原切片有较高的敏感性和特异性。110例以粪检确定的血吸虫病患者血清的阳性率为96.3％;22例健康人(对照)血清未发现假阳性反应。本法抗原性稳定、操作简便、快速,在检测血吸虫病方面优于环卵沉淀反应试验。     

Testicular function in eight patients with seminoma after unilateral orchidectomy and radiotherapy

Testicular function was monitored in eight patients with low stage seminoma who were treated with radiotherapy following unilateral orchidectomy. The absorbed gonadal radiation dose ranged from 15 to 157.5 rad. At 10-24 months after radiotherapy, serum hormone levels, sperm analysis, sperm penetration into zona-free hamster ova (HOP-test) and lymphocyte chromosome abnormalities were evaluated. Two patients were azoospermic with elevated serum levels of LH and FSH. The remaining six patients had slightly decreased (n = 3) or normal (n = 3) seminal parameters. Their HOP rates were within the normal range. A low incidence of polyspermy (i.e. only one penetrating sperm per ovum) was found in the patients, suggesting low penetrability of motile sperm. A highly significant correlation was found between sperm count or sperm penetrability and time post-irradiation. The results indicate that restitution of testicular function is time-dependent.