亮氨酸脑啡肽的电子结构及构效关系研究

对亮氨酸脑啡肽进行了量子化学(INDO)计算,研究其电子结构特征,讨论其活性部位、作用机理及构效关系。同吗啡和R31833进行了活性部位的电子结构与空间结构比较,推断它们的活性药效结构具有共同特点,与阿片受体相互作用时作用方式相同,作用部位有对应关系,因而具有相同的药理性质。     

恶性疟P190抗原保守区Ⅰ、Ⅴ基因的亚克隆及在大肠杆菌中高效表达

作者采用PCR方法克隆了我国海南省FCC1/HN株P190抗原两个保守区基因,分别定名为P190CRI和P190CRV。基因片段经纯化后连接到pUC18载体中进行DNA序列分析,结果显示:除了P190CRV中有5个碱基变换外,其余序列均与MAD20型序列一致。经序列分析的两个基因片段分别与pGEX-2T载体连接,经双酶切鉴定后转化感受态JM109(DE_3)大肠杆菌进行高效融合表达,并且用Sepharose 4B-谷胱甘肽层析柱进行亲和纯化,结果为:两个插入基因片段均得到高效融合表达,经一步亲和纯化后就取得高纯度的重组蛋白。     

同步间歇正压通气联合新型经鼻持续气道正压通气治疗新生儿肺出血14例

目的探讨同步间歇正压通气+呼吸末正压(IPPV+PEEP)治疗新生儿肺出血的疗效。方法对14例肺出血患儿进行IPPV+PEEP,观察上机后的临床表现,动脉血气变化及并发症的发生。结果12例实施同步IPPV+PEEP青紫立刻减轻或消失(85%),12h内肺出血完全停止3例(21%),24h内肺出血停止7例(50%),12h内动脉血氧分压由(42.5±6.95)mmHg升高至(84.9±7.85)mmHg,动脉二氧化碳分压由(53.92±12.4)mmHg降低至(41.64±10.25)mmHg,血氧饱和度由(55.7±12.75)%升高至(89.45±7.65)%。8/14例(57%)肺出血患儿被治愈,死亡6/14例(43%)。结论同步IPPV+PEEP联合NCPAP治疗新生儿肺出血有良好疗效,值得临床推广。     

方剂学科发展思路与方法

方剂学科传统模式已发生重大变化，现代方剂学以计算机和实验为重要研究手段，熔理论方剂学、实验方剂学及临床方剂学于一炉。现代方剂学科模式的建立必将培育出新的知识增长点，丰富学科内涵，促进研究方向和专业课程的调整，提高学术水平和人才培养质量，实现新世纪方剂学科发展质的飞跃。     

达乌尔黄鼠种群繁殖特征的研究

本文根据1983～1986年在松辽平原区通辽地区的调查,研究了达乌尔黄鼠种群繁殖特征。结果表明:在松辽平原地区,各年份达乌尔黄鼠的怀孕率多在90％以上,平均胚胎数多在8.0以上,胚胎分布呈正态分布。黄鼠在怀孕过程中,有5.48—16.26％的雌体发生胚胎吸收,平均吸收胚胎2.0个左右,吸收胚胎分布呈poisson分布。1984年观察,平均每只雌鼠实际产仔鼠7.622±0.154只,其分布仍为正态分布。     

海南省消灭脊髓灰质炎开展强化免疫活动的效果评价

笔者根据海南省脊髓灰质炎历年的发病情况，以常规免疫和省内及全国强化免疫资料，对该省消灭脊髓效果进行了评价。结果表明：１９９３、１９９４年两年全国强化免疫活动日的效果显著，海南省从１９９４年以来无脊灰野毒感染病例发生。实验室资料也证实，全国强化免疫活动日，起到了阻断Ⅰ型野毒株循环的作用。     

Differential Effect of Diarrhea on FK506 Versus Cyclosporine A Trough Levels and Resultant Prevention of Allograft Rejection in Renal Transplant Recipients

Diarrhea is the most frequently reported adverse event in patients treated with mycophenolate mofetil. Twenty-six renal transplant patients on a mycophenolate mofetil-based immunosuppressive regime with persistent afebrile diarrhea were examined. Diarrhea caused a significant rise in FK-506 trough levels despite intake of stable doses, necessitating FK-506 dose reductions of 30% to obtain pre-diarrhea trough levels. In contrast, trough levels of cyclosporine A remained stable without dose adjustments. This suggests that absorption and/or metabolism is differentially altered for FK506 compared with cyclosporine A in patients with diarrhea. In nine patients mycophenolate mofetil was reduced or stopped because of persistent diarrhea without identifiable cause. This resulted in end-stage renal disease because of chronic rejection in two patients, and in acute rejection in two patients, all taking FK506 and steroids. Therefore, dose adjustments of FK506 in patients with diarrhea must be carefully monitored, especially when doses of mycophenolate mofetil are also reduced.     

还精煎对老年小鼠胸腺超微结构及性激素受体的作用观察

本文观察了以填补肾精为主的延缓衰老方剂还精煎对老年小鼠胸腺超微结构及胸腺性激素受体等的影响。结果表明还精煎能明显提高老年小鼠胸腺重量;改善胸腺超微结构的老年性变化;使胸腺胞浆蛋白质、核 RNA 和 DNA 含量显著增加;并减少胸腺核雌二醇(E_2)受体和双氢辜酮(DHT)受体数量,从而减弱 E_2、DHT 对胸腺的致萎缩作用。还精煎的上述作用提示填补肾精法延缓衰老可能与调整下丘脑—垂体—性腺—胸腺轴功能有关。     

ENDOURETHRAL URETHROPLASTY WITH PREPUCE GRAFT FOR LONG POSTERIOR URETHRAL STRICTURE

Twenty patients underwent endourethral urethroplasty with free prepuce graft in combination with transurethral resection of scar for posterior urethral stricture. Two-year follow-up showed that they had good continent and free voiding results. Problems about surgical technique were detailed. We conclude that a free full-thickness prepuce evenly patched by means of the tube balloon to the freshly prepared wound derived from the stricture is the key to surgical success.