骨钙素酶免疫检测方法的研究和应用

目的：建立骨钙素酶免疫测定方法，并应用于临床检测血清骨钙素。方法：应用了3种检测模式，根据检测灵敏度、剂量反应曲线的形态进行分析，选择出合适的模式进一步应用于临床血清标本的骨钙素检测。结果：所采用的骨钙素单克隆抗体是钙离子依赖型的。固相抗原竞争法适合于临床定量测定骨钙素。最低可测限为1．4μg/L;20μg/L骨钙素样品批内CV＝3．98％，批间CV＝12．67％。测定正常献血员140名（年龄17－45岁），第5－95百分位点的骨钙素含量，男性为7．5－15．0μg/L女性为7.0-17.5μg/L。70例疑有骨质疏松症患者血清骨钙素含量2．91－30．20μg/L，以第95百分位点的骨钙素含量为cut-off值，升高5例。与进口试剂盒（Novocalcin,USA）相比较，有较好的相关性，r=0.81。结论：固相抗原竞争法酶免疫测定可以灵敏地检测血清中骨钙素含量，有实用价值。     

七种世界首报核型中期及高分辨G—显带分析

本文报告了7种世界首报染色体异常核型,并用高分辨显带技术对异常染色体的断裂点进行了精确定位,同时还对X-常染色体平衡易位引起临床症状的可能原因以及高分辨显带在染色体病诊断方面的优越性进行了讨论。     

Thyrotropin-releasing hormone inhibits pancreatic enzyme secretion in humans

Recent studies have shown that thyrotropin-releasing hormone is present in gastrointestinal tissues and has effects on gastrointestinal motility and secretion. In the present study, we have investigated in healthy subjects the effects of various doses of thyrotropin-releasing hormone on secretin-cholecystokinin-stimulated pancreatic secretion. Intravenous infusion of thyrotropin-releasing hormone at doses of 4, 20, and 100 microgram/30 min, administered during a constant pancreatic stimulation with secretin (0.5 Clinical Units/kg/h) and cholecystokinin (0.5 Ivy dog units/kg/h), produced a significant decrease in lipase and chymotrypsin secretion without affecting volume and bicarbonate secretion. The decrease appeared immediately with the lowest dose of TRH employed, and was progressively more marked with increasing doses of the hormone. Compared with the control experiments, the maximal inhibition of lipase output reached -17.6%, -37.2%, and -43%, and the maximal inhibition of chymotrypsin output -18.2%, -39.3%, and -44.9%, for the three doses of thyrotropin-releasing hormone employed, respectively. It is concluded that TRH has a marked inhibitory effect on the enzymatic component of the pancreatic secretion stimulated by submaximal doses of secretin and cholecystokinin. The physiologic importance of this effect remains to be defined.     

Endoscopic electromyography and manometry of the human sphincter of Oddi

The myoelectric and manometric activities of the sphincter of Oddi were recorded in 8 patients using an original probe passed through the papilla of Vater during duodenoscopy. The sphincter of Oddi's myoelectric activity showed rhythmic bursts of action potentials which appeared in correspondence with the ascending phase of the phasic pressure waves. On the basis of these results, we believe that electromyography could in some cases replace manometry for studying sphincter of Oddi motility, since it avoids pressure perfusion of the bilio-pancreatic tract, with its concomitant risks, and provides sufficient information for motor studies.     

HSV-1包膜糖蛋白G重组蛋白的纯化与抗原性分析

①目的纯化原核表达的HSV-1包膜糖蛋白G重组蛋白并对其抗原性进行分析。②方法应用亲和层析法纯化重组蛋白，Western印迹和ELISA法检测分析其抗原性。③结果Western-Blot，检测15份HSV-1 IgM阳性血清，其中12份血清可与重组蛋白发生反应；ELISA法检测535份血清，与商品化同类试剂盒相比符合率为89．7％．④结论该重组蛋白检测HSV-1活动性感染有较高的应用价值。     

野生型p53基因抑制舌鳞癌细胞株Tca8113在裸鼠体内生长及增殖研究

为考察野生型ｐ５３基因转移入舌鳞癌细胞株Ｔｃａ８１１３后，癌株在裸鼠体内的生长及增殖状态，作者采用电穿孔方法分４组进行了如下基因转移：野生型ｐ５３基因，空白对照质粒，突变型ｐ５３基因和未转移任何基因的空白对照。在基因转移进入舌鳞癌细胞株Ｔｃａ８１１３后，分别接种于１６只裸鼠体内。成瘤后分别进行常规病理学、定量病理学和免疫组织化学研究。结果：转染野生型ｐ５３基因组与其余３组比较，其形成的肿瘤重量明显为轻；肿瘤异常核分裂相减少；定量病理学显示肿瘤坏死区面积所占瘤体总面积的百分比明显降低；免疫组织化学显示非坏死区增殖细胞核抗原明显更低。上述结果提示肿瘤细胞获取了功能完好的外源性野生型ｐ５３基因后，其基因表达并产生了新的负性调节因子，抑制了肿瘤的生长和增殖。并从理论上证明了利用野生型ｐ５３基因口腔粘膜鳞癌进行基因治疗是可能的。     

应激引起大鼠行为改变可能与中枢谷氨酸系统有关

本实验以旷场试验法测定动物在急、慢性躯体性和心理性应激时的行为变化;以快速杀头冷冻匀浆法,用HITACHI-835氨基酸分析仪测定应激各期视皮层、海马、下丘脑、小脑谷氨酸含量,并经侧脑室微量注射L-AP_4后观察行为变化。结果显示,急性应激动物行为活动增加,慢性应激减少;躯体性和心理性应激时,大鼠四脑区的谷氨酸含量与对照组相比在不同时期呈现显著性差异,躯体性和心理性应激组之间谷氨酸含量有显著性差异的是:视皮层、海马、侧脑室微量注射L-AP_4后可致行为活动减弱。     

A Novel Enhancer for Fe~(2 )-Catalyzed Light Emission Reaction of Luminol and Dissolved Oxygen

用ＥＤＴＡ可增强Ｆｅ２＋催化鲁米诺与溶解氧的发光反应，将ＥＤＴＡ加入鲁米诺溶液中可使流动注射分析测亚铁的检出限降低约１６０倍。在流动注射分析的试样分流路中使用新型的锌镀铜微还原柱，可同时测定Ｆｅ２＋和Ｆｅ３＋。该微还原柱可至少测定３０００个试样。测定Ｆｅ２＋和Ｆｅ３＋的线性范围是１×１０９～１×１０５ｍｏｌ·Ｌ１，检出限分别为２．７×１０１０和３．５×１０１０ｍｏｌ·Ｌ１，测定试样的速率为６０ｈ１。Ｃｒ３＋和Ｃｏ２＋有干扰。测定混合物中的Ｆｅ２＋和Ｆｅ３＋获得满意结果，测试样的结果同标准的分光光度法结果一致。实验表明，ＥＤＴＡ起增强剂的作用，Ｆｅ２＋是催化剂，而溶解氧是氧化剂。对反应机理进行了讨论。