2型糖尿病及其血管并发症患者血清ACE活性的变化

This investigation was made with reference to the changes of serum angiotensin converting enzyme (SACE) activity in type 2 diabetes and its vascular complications. SACE activity was studied in 127 type 2 diabetic patients and 90 healthy persons by using a spectrophotometric assay. The results showed SACE activity was obviously higher in diabetic patients (459.51 +/- 175.85 U) than in healthy persons (321.14 +/- 121.27 U); SACE activity was significantly higher in type 2 diabetic patients with diabetic nephropathy (548.27 +/- 166.60 U) than in patients without diabetic nephropathy (383.2 +/- 139.00 U), but there was no difference between patients with microalbuminuria and macroalbuminuria; no statistical difference was detected in SACE activity between diabetic patients with diabetic retinopathy (465.64 +/- 178.93 U) and without retinopathy (449.07 +/- 170.04 U); SACE activity was not associated with the course of diabetes, blood pressure, blood lipid and blood glucose. These data suggest that raised SACE activity might only play a role in the initiation of type 2 diabetes and diabetic nephropathy, but not relate to the progress of diabetic nephropathy, the onset of diabetic retinopathy and hypertension.     

鼻咽癌组织中微血管的分布

目的：观察鼻咽癌组织中微血管的分布及存在状况,探讨其与鼻咽癌的临床病理联系。方法：采用免疫组织化学Ｓ－Ｐ法,检测血栓调节蛋白在鼻咽癌血管内皮细胞的表达,进行微血管的定性半定量研究。结果：鼻咽癌组织中微血管的分布不均匀。极性消失。血管呈分支芽状弥漫分布于癌组织中,或呈条索状围绕癌细胞团。微血管的数目与癌细胞的增殖指数屯预后正相关。结论：鼻咽癌组织中微血管数与患者的生存期有关。     

洛土辛对豚鼠心室肌细胞动作电位及L型钙电流的作用

采用膜片钳技术全细胞记录方式,研究洛土辛（Ｌｏｔ）对单个豚鼠心室肌细胞动作电位（ＡＰ）和Ｌ型钙通道电流（ＩＣａ－Ｌ）的影响。结果表明,Ｌｏｔ３０μｍｏｌ／Ｌ明显延长ＡＰ时程,介不影响静息电位和ＡＰ幅度,由增加全细胞ＩＣａ－Ｌ。贴附式单通道记录表明,Ｌｏｔ １００μｍｏｌ／Ｌ不改变斜率电导,对Ｌ型钙通道的门控过程也无明显影响,但显著提高单通道的平均电流,使非空白记录从２５％增至４１％。提示,Ｌｏｔ增     

粒单系白血病原始细胞表达血小板特异性抗原与周期蛋白D3异常表达关系的研究

目的 :探讨急性单核细胞白血病原始细胞表达血小板特异性抗原的机制。方法 :分离外周血或骨髓单个核细胞 ,采用常规染色和普通细胞化学染色观察其形态学特性 ,采用流式细胞仪双荧光分析免疫表型 ,单荧光胞浆蛋白标记分析周期蛋白表达和免疫印迹进一步证实周期蛋白 D3的表达情况。采用周期蛋白和 DNA双标记分析周期蛋白 D3表达与细胞周期的关系。结果 :白血病原始细胞中 CD1 3 HL A- DR 细胞为 94.6 9% ,CD1 3 CD34 细胞为 96 .86 % ,CD41 a CD34 细胞为 41.6 0 % ,CD1 3 CD41 a 细胞为 40 .0 0 % ,免疫印迹和流式细胞仪单参数分析证实周期蛋白 D3表达明显升高 ,周期蛋白 D3阳性细胞在细胞周期各时段所占的比例分别为 :G1 期 5 2 .10 % ,S期9.90 % ,G2 M期 38.0 0 %。结论 :周期蛋白 D3的异常表达导致单核系白血病细胞表达血小板特异性抗原 ,同时也可能在白血病的发生中起重要作用。     

Chemical conjugation of a novel antibody-interleukin 2 immunoconjugate agains t c-erbB-2 product

Objective To develop a new chemical method to produce a monoclonal antibody (MoAb) 520C9/recombinant human interleukin 2 (rhIL-2) conjugate. Methods MoAb 520C9 reactive with the protooncogene c-erbB-2 product P185 was chemically conjugated with rhIL-2 by using a simple two-step method.First, the rhIL-2 was activated by Sulfosuccinimidyl 4-［N-maleimidomethyl］ cyclohexane-1-carboxylate, a heterobifunctional linker, and N-succinimidyl s-acetylthioacetate was introduced onto 520C9.Then SATA on the 520C9 was reacted with the maleimide group on the activated rhIL-2 to generate 520C9-rhIL-2 immunoconjugate. Results The immunoconjugate retained the antigen binding activity compared to the respective native antibody as determined by an indirect live cell binding assay.The immunoconjugate also possessed IL-2 activity as measured by the standard CTLL-2 cells proliferation assay and the stimulation of human peripheral blood mononuclear cells (PBMCs) into lymphokine-activated killer cells. Conclusion Our method of conjugation of rhIL-2 to 520C9 preserves the binding activity of the antibody and the cytokine function of IL-2.This simple and efficient method of conjugation should be applicable to other types of MoAbs and recombinant cytokines.     

细胞周期调控相关基因与乳腺癌发病机制的研究

目的了解细胞周期p21 waf1/cip1调控途径中p53、p21 waf1/cip1、cyclinD1、cyclin E基因在乳腺癌发病机制中作用及相互间关系.方法用免疫组化方法于17例乳腺良性组织、19例癌前病变、69例乳腺癌(20例导管内癌、49例浸润性导管癌)中检测4种基因蛋白表达,原位RNA分子杂交、原位DNA分子杂交方法于25例乳腺癌、15例癌前病变(大部为cyclinD1蛋白过表达)中检测cyclinD1 mRNA水平及基因状况.结果①p53在良性、癌前病变组织中失表达,在乳腺癌中阳性表达率为28%;②p21表达与p53表达无负相关性;③p21在乳腺癌中过表达率为29%;cyclinD1、cyclin E过表达率为46%、51%,显著高于癌前病变及良性组织;cyclinD1过表达与淋巴结转移、cyclinE过表达与肿块大小呈正相关;④cyclinD1蛋白过表达的乳腺癌中其相关的基因扩增率为32%;⑤p21表达与cyclinD1、cyclinE表达正相关.结论①突变型p53基因参与乳腺癌发生;②乳腺癌中p21表达不完全依赖于野生型p53基因;③正、负性调控因子p21、cyclinD1、cyclinE基因表达异常及cyclinD1基因异常是乳腺癌早期频发的分子事件,参与乳腺癌发生发展,证实了周期失控是肿瘤发生的重要机制;④基因扩增是cyclinD1 mRNA过表达及蛋白过表达的分子机制之一;⑤p21可能间接调控cyclinD1、cyclinE表达.     

乌曲墨对H22癌细胞内Ca^2＋浓度、细胞核Ca^2＋／Mg^2＋—ATP酶活性及c—fos表达的

目的：研究乌贼墨对H22癌细胞内Ca^2 浓度、细胞核Ca^2 /Mg^2 -ATP酶活性及c-fos表达的影响。方法：利用Fura-2/AM灾光探针和免疫组织化学方法,测定乌贼墨对H22癌细胞内Ca^2 浓度、细胞核Ca^2 /Mg^2 -ATP酶活性及c-fos表达的变化。结果：乌贼墨使H22癌细胞内Ca^2 浓度降低了69%和79%,细胞核Ca^2 /Mg^2 -ATP酶活性降低了21%和37%,c-fos表达明显减少。结论：乌贼墨可能通过降低细胞内Ca^2 浓度,影响细胞核上Ca^2 依赖性Ca^2 /Mg^2 -ATP酶活性,减少了Ca^2 向细胞核内的转运,减弱了Ca^2 对c-fos表达的促进作用,抑制了细胞的分裂增殖。     

氯沙坦对原发性高血压患者尿酸的影响

目的　探讨氯沙坦对原发性高血压患者尿酸的影响。方法　原发性高血压 31例在常规钙拮抗剂治疗 1周后 ,随机分治疗组加用氯沙坦 ,对照组不加用 ,比较两组血清尿酸 ,尿尿酸测值。结果　治疗组血清尿酸水平降低。结论　氯沙坦能降低血清尿酸水平 ,增加泌尿系尿酸排泄     

A蛋白免疫吸附治疗系统性红斑狼疮的探讨

自 1 998年 7月以来 ,我们采用 A蛋白免疫吸附 (IA)治疗系统性红斑狼疮 (SL E) ,收到较好效果。资料与方法 :SL E患者 2 9例 ,男性 5例 ,女性 2 4例 ,年龄 1 4～ 6 0岁。各组织器官受损情况 :皮肤受损 2 2例 ,关节炎 2 6例 ,口腔溃疡 1 6例 ,浆膜炎 1 3例 ,神经系统异常 3例 ,血液系统损害 2 9例 ,肾脏病变 2 9例。在接受 A蛋白 IA治疗前 ,全部患者均经过激素、细胞毒类、抗凝、抗血小板聚集、雷公藤等常见药物正规治疗 (包括甲基强的松龙及环磷酰胺冲击治疗 ) ,其中 4例使用过骁悉治疗 ,均未能控制住活动性病变及疾病的进展。对以上患…     

Ⅱ期梅毒误诊为银屑病1例

患,女,27岁,已婚。全身出现脱屑性红斑2个月,先后在当地诊所以银屑病治疗,未见好转。来我科就诊时,询问病史,发现皮疹出现1个月前,患大阴唇曾有过破溃史。