AUGMENTATION OF ANGIOTENSIN II RELEASE FROM ISOLATED MESENTERIC ARTERIES OF WISTAR-KYOTO AND SPONTANEOUSLY HYPERTENSIVE RATS FOLLOWING NEPHRECTOMY

1. We previously reported that angiotensin II release from the mesenteric arteries of Wistar-Kyoto (WKY) and spontaneously hypertensive rats (SHR) increased in a time-dependent manner as a result of the isolation of the arteries and perfusion. This phenomenon appeared to be due to the withdrawal of circulating angiotensin II (AII). 2. The purpose of the present study was to test the hypothesis that vascular AII generation may be negatively regulated by circulating AII in WKY and SHR, and to clarify the role of this vascular angiotensin II in the sustained hypertension of SHR following nephrectomy. 3. The mesenteric arteries from kidney-intact and nephrectomized WKY and SHR were perfused and the amount of AII released into the perfusate was measured. The effects of the angiotensin converting enzyme inhibitor, captopril, and the effects of supplementation of renal renin and circulating angiotensins to nephrectomized rats, by blood exchange between kidney-intact and nephrectomized rats, on AII release were examined to clarify the pathway of vascular AII generation after nephrectomy. 4. Nephrectomy caused augmentation of vascular AII release both in WKY and SHR in spite of the abolishment of circulating renin. Captopril reduced this enhanced release of AII, but blood exchange did not affect it. There was no significant difference in these responses between WKY and SHR. 5. These results suggest that WKY and SHR have in common a potent pathway for production of vascular AII in response to the withdrawal of circulating AII, although this pathway is not responsible for the sustained hypertension of SHR after nephrectomy. The precise pathophysiological role of this pathway remains to be elucidated.     

大黄总甙、大黄素和番泻甙对小鼠离体肠管葡萄糖转运电位的影响

本实验采用记录翻转小肠和结肠囊葡萄糖转运电位的方法,来研究大黄泻下作用的有效成分大黄总甙、大黄素和番泻甙对小肠及结肠囊跨肠壁电应差的变化,发现上述成分可阻止葡萄糖和Na~+的转运,这一结果为进一步阐明大黄泻下作用的原理提供新的理论依据。     

美国西尼罗病毒监测及我国国境口岸实施监测的策略

西尼罗热(West Nile Fever,WNF)是由西尼罗病毒(West Nile Virus,WNV)感染引起的一种急性传染病.该病毒最早于1937年从非洲乌干达西尼罗地区一名发烧妇女的血中分离到而得名[1].西尼罗病毒以往仅在非洲、西亚、中东地区流行,20世纪60年代初传入欧洲,自1999年起在西半球登陆,在美国传播,并相续传入其周边国家.2002年在美国造成西尼罗热大流行,4 161例感染,277人死亡;2003年美国9 862例发病,264例死亡[2].西尼罗病毒的扩散和传播引起了全球卫生界的关注.     

Release of severe post-burn axillary contracture with the latissimus dorsi flap

Summary One stage reconstruction of the anterior axillary fold, in a case of severe post-burn axillary contracture, with the island latissimus dorsi musculocutaneous flap is described. Postoperatively the patient had a full range of active abduction and a good cosmetic result.     

急性软脑膜微循环障碍实验模型的研究

本文报道应用高分子右旋糖酐制成软脑膜微循环障碍的动物实验模型。软脑膜微循环障碍模型的标志;软脑膜微血管血流速度减慢,血液流态呈粒状流或絮状流,血细胞聚集。 将98只家兔分成甲、乙二组。甲组38只,静脉注射平均分子量为25万的高分子右旋糖酐,乙组60只,静脉注射平均分子量为49万的高分子右旋糖酐。实验结果发现,甲组38只家兔仅28只可复制成软脑膜微循环障碍的实验模型,模型复制成功率为73.6％;乙组60只家兔,59只可形成软脑膜微循环障碍实验模型,成功率为98.3％。本实验证明复制动物模型以49万分子量的高分子有旋糖酐为宜。 本实验模型可用于脑微循环障碍和改善脑微循环药物的研究工作。     

人工心肺机血液泵监测系统的研制

为避免人工心肺机血液泵转速失控现像的发生，特研制人工心肺机监测系统，通过对血泵转速的实时监测，判断系统是否正常，自动进行相应的处理，提高现有系统的安全性。     

维生素D的骨外作用

越来越多的研究表明,维生素D除具有经典的调节钙磷平衡和维持骨骼健康的作用外,还具有其他更为广泛的骨外生物学效应,如调节免疫、抗肿瘤、保护中枢神经系统和防治代谢综合征等作用.本文就相关方面的研究进展进行综述.