Effects of Intraventricular Injection of Calmodulin Antagonist （Trifluoperazine） on Pregnancy in Rats

Injection of TFP (a specific antagonist of CaM) into the lateral ventricles of the rat brain on the fourth day of pregnancy causes marked antifertility effect in 83% of the rats (0% in the control group). Examination with the pontamone blue reaction for the implantation elucidated that the antifertitity effect was due to the blockage of implantation of the follicle. Injection of TFP into the lateral ventricles of the brain markedly reduced the concentration of CaM in hypothalamus, ovary and uterus. Serum progesterone was also reduced. However, injection glven on day 7 was ineffective to terminate the pregnancy. Injection given on certain time of pregnancy was able to reduce the cellular CaM content and to cause antifertitity. This finding demonstrated that CaM played an important rote during the course of pregnancy.     

锌离子对大鼠海马突触体Ca^2＋—Mg^2＋ATP酶活性及蛋白合成的影响

行为实验己经证明，锌过多或缺锌均可影响脑功能。锌作为体内重要的微量元素，影响多种酶的活性及蛋白质和核酸的台成。本实验通过体外分离大鼠脑海马突触体，观察不同浓度锌离子对Ca2 －Mg2 ATP酶的活性和3H－Leu掺入突触蛋白合成的影响．结果表明：1．锌离子浓度在25μmol／L时增加该酶的活性（＜0．01），并促进3H－Leur掺入蛋白质的合成（＜0．05）。2．锌离子在50,100，200μmol／L的较高浓度时对Co2 －M2 ATP酶的活性有显著的抑制作用（分别为：P＜0.05．P＜0．01，P＜0.01），仅200μmol／L对3H—Leu掺入突触蛋白合成有抑制作用。本研究提示：适量的锌对突触体功能的维持是必要的，但剂量过高则起相反作用。     

大白鼠肾上腺的血管构筑

本实验采用血管铸型扫描电镜,注射明胶卡红组织切片显微镜下观察和注射铅丹乳胶追踪血管来源三种方法对14只健康大白鼠肾上腺血管构筑进行了研究。大白鼠肾上腺动脉发自腹主动脉和肾动脉。它们在行程中发出分支至腺体表面,再次分支穿入囊内,逐级分支至毛细血管。皮质动脉发自囊内血管,它们在皮质中分支分布。球状带的毛细血管与囊的毛细血管相连,毛细血管在球状带围绕细胞团形成网眼状;在束状带呈放射状排列;在网状带吻合增多形成网状。髓质动脉亦发自囊的血管,它们在皮质中不发分支直抵髓质,在髓质分成毛细血管。网状带的毛细血管越向髓质口径越粗,它们在皮髓交界处互相吻合形成更粗的静脉,这些静脉逐级吻合,最后形成一主干——中央静脉,它穿出皮质出现于肾上腺门处。左侧的中央静脉注入在肾静脉,右侧的注入下腔静脉。     

Epinephrine-induced pulmonary oedema in rats is inhibited by corticotropin-releasing factor.

In various animal models of injury to skin, mucous membranes, muscle and brain, corticotropin-releasing factor (CRF) attenuated vascular leakage in the injured tissues. Here, the effects of CRF on a rat model of pulmonary oedema were examined. Male albino rats (220-290 g) received saline or CRF s.c., 30 min before pentobarbital anaesthesia, 60 mg/kg i.p., and 1 h before 1-epinephrine bitartrate (Epi), 30 micrograms/kg i.v. Within 30 min after Epi all (n = 27) saline-pretreated rats were dead from pulmonary oedema, but animals receiving human/rat CRF at doses of 7 to 57 micrograms/kg s.c. (n = 25) were all alive. Body wt, wet and dry wt of lungs were used to calculate an oedema index. This index increased from 3.6 +/- 0.1 to 9.6 +/- 0.3 after Epi but was inhibited by 87% after CRF 28 micrograms/kg s.c. The ED50 of CRF for reducing pulmonary oedema was 3.2 (1.3-7.4) micrograms/kg s.c. Mean arterial pressure increased from 119 +/- 4 to 167 +/- 2 mmHg after Epi 10 micrograms/kg i.v., but was not different (118 +/- 3 to 169 +/- 4 mmHg) after CRF pretreatment, 6 micrograms/kg s.c., a dose which reduced lung oedema. Pharmacokinetic estimates suggest that plasma levels of CRF sufficient to attenuate lung oedema in rats approximate those seen in pregnant women at delivery, raising the possibility that endogenous CRF may protect the maternal organism during parturition.     

胎儿耳廓弹性软骨及其组织的发生

用９周－３９周引产胎儿标本７２例，取右耳廓石蜡切片，ＨＥ和Ｗｅｉｔｅｒｔ弹性纤维染色，光镜观察其弹性软骨、弹性纤维、耳廓肌和结缔组织的发生。     

儿科急诊抢救中存在问题的分析及对策

"工欲善其事,必先利其器",具备抢救急重危患儿的能力,是每个儿科护士在护理危重患儿中的利器之一.因此,本文针对护理人员在急诊抢救护理过程中的问题进行分析,提出解决问题的相应对策,以提升护理专业素质.     

无孔处女膜临床分析

目的 分析总结无孔处女膜的诊断要点，提高诊断率。方法 回顾性分析我院近10余收治的5例无孔处女膜的临床资料。结果 5例患均无月经初潮，仅有程度不同的下腹疼痛，尤其是周期性的下腹疼痛。3例表现为急性下腹痛并急性尿潴留。2例误诊为卵巢囊肿、卵巢畸胎瘤。结论 少女己进入月经来潮年龄，但无月经初潮，仅有程度不同的下腹疼痛，尤其是有周期性的下腹疼痛，应想到无孔处女膜的可能。肛诊触及盆腔囊性包块，不活动；B超探查子宫与附件形态正常，相当于阴道的解剖部位有液性暗区，提示经血潴留，有助于本病的诊断。     

Relationship between height, collagen metabolism, hair zinc and excessive fluoride intake]

After eliminating confounding factors, the study was made on the relationship between height, collagen metabolism, hair zinc and excessive fluoride intake. 140 schoolchildren aged 12-13 years born and reared in endemic fluorosis areas were surveyed. The results were as follows: 1. The average height of children with dental fluorosis III degree (DF III degree) was appreciably smaller than that of children without dental fluorosis. Among children with excessive fluoride intake, a negative correlation between the height and fluoride level in staple foods was seen. 2. The more the fluoride ingested, the higher the urinary THP excreted, showing that fluoride intoxication interfered with the collagen metabolism. 3. Among children with excessive fluoride intake, the height showed negative correlation with urinary THP/Cr, suggesting that the effect of fluoride on collagen metabolism indicated the mechanism of height retardation. 4. As compared to control group with the excessive fluoride intake but without dental fluorosis group, there was a significant reduction in hair zinc in group with DF III degree, suggesting that the zinc in the body decreased because of zinc metabolism disturbance by excessive fluoride intake. But among cases with excessive fluoride intake, no appreciable correlation between hair zinc and height was found. Therefore, it could not be confirmed that the effect of fluoride on zinc metabolism affected the height development.     

不同来源HSP70的氨基酸组成分析

使用ＤＥＡＥ－５２离子交换层析和ＡＴＰ琼脂糖亲和层析方法，从人体肿瘤细胞株，大鼠肝脏和心脏、家兔和小鼠肝脏组织中纯化了主要的热应激蛋白－ＨＳＰ７０，用氨基酸自动分析仪分析它的氨基酸组成。