Detection of cell apoptosis by MTT assay.]

OBJECTIVE: To study the feasibility of using MTT assay to detect cell apoptosis. METHODS: K562 cells were grown in RPMI 1640 medium supplemented with 10% calf serum and 4 micromol/L arsenic trioxide. Apoptosis was induced in the cultured cells by As2O3, and the cells were detected with optical microscope, DNA gel electrophoresis and MTT staining respectively. RESULT: MTT staining could also accurately detect cell apoptosis, by which the apoptotic cells were easily distinguished from normal cells and dead cells. CONCLUSION: MTT staining is simple, convenient and practical for detecting cell apoptosis.     

银杏竹鼠肌肉成分对小鼠智力、体力的影响

目的：观察银杏竹鼠肌肉成分对小鼠智力体力的影响。方法：小鼠随机分为七组，通过喂饲银杏竹鼠肌肉干粉连续一个月，用小鼠低温游泳存活时间实验，耐缺氧实验及跳台和记忆获得障碍实验分别记录低温游泳存活时间，缺氧存活时间及第一次错误潜伏期和跳台错误次数。结果：各竹肉组小鼠与普通饲料（ＮＳ）组，普肉组，护宝液组比较，均可明显延长小鼠低温游泳存活时间和缺氧存活时间（Ｐ＜０．０５），与洋参丸组相当（Ｐ＞０．０５），竹肉大／超组小鼠跳台错误次数均减少（Ｐ＜０．０５），竹肉超组小鼠第一次错误潜伏期延长（Ｐ＜０．０５），竹肉大组小鼠第一次错误潜伏期有延长趋势，但无统计学意义。结论：口服银杏竹鼠肌肉成分可增强小鼠学习记忆能力，增强小鼠体质，提高小鼠生活质量。这一结果也提示银杏竹鼠肌肉成分很有可能成为极有应用前景和开发前景的保健食品。     

高脂血症时血清二乙基对硝基苯磷酸酯酶活性的变化

目的 :研究tritonWR 13 3 9致小鼠高脂血症时血清二乙基对硝基苯磷酸酯酶 (ParaoxonaseI ,PON 1)活性的变化及PON 1活性与血浆脂质含量之间的关系。方法 :在小鼠尾静脉注射tritonWR13 3 9后的 3h ,6h ,12h ,2 4h ,48h ,72h ,眼球摘除术取血 ,用酶标法测定小鼠血浆总胆固醇 (TC) ,甘油三酯 (TG ) ,高密度脂蛋白 -胆固醇 (HDL -C) ,载脂蛋白AI (ApoAI) ,载脂蛋白B (ApoB含量 ) ,并计算出ApoAI/ApoB ,HDL -C/TC比值 ,用分光光度计法测定PONI活性。结果 :TritonWR 13 3 9尾静脉注射后 3h ,小鼠血浆TC和TG含量即急剧增高 ,与对照组相比 ,P <0 .0 1,分别在注射后 2 4h和 3h达到峰值 ,随后逐渐下降 ,其中血浆TG含量在注射后 48h即恢复正常水平。tritonWR13 3 9尾静脉注射后 3h ,小鼠血浆HDL -C和ApoB含量急剧增高 ,与对照组相比 ,P <0 .0 5,分别在注射后 2 4h和 6h达到峰值 ,随后逐渐下降 ,分别在注射后 48h和 72h恢复正常水平。tritonWR13 3 9尾静脉注射后 3h ,小鼠血浆ApoAI含量即急剧降低 ,与对照组相比 ,P <0 .0 5,随后逐渐增高 ,在注射后 6h即恢复正常水平。tritonWR 13 3 9尾静脉注射后 3h ,小鼠血浆ApoAI/ApoB和HDL-C/TC比值减少 ,与对照组相比 ,P <0 .0 1,随后逐渐增高 ,其中ApoAI/ApoB比值在 72h恢复     

比索洛尔改善充血性心衰心功能及心肌重塑的疗效观察

目的　观察比索洛尔 (bisoprolol)对充血性心衰心功能及心肌重塑的临床疗效 .方法　 2 12例患者随机分为比索洛尔组和常规药物组 ,比索洛尔剂量起始量 0 .6 2 5 mg～1.2 5 0 mg,1次· d- 1 ,逐渐增加至最大剂量为 2 .5 mg～ 5 .0mg,1次· d- 1 .观察心功能、临床疗效、左室舒张末内径(L VEDD)、左室收缩末内径 (L VESD)、射血分数 (EF)、舒张早期 E峰流速 /舒张晚期 A峰流速 (VE/ VA) .结果　比索洛尔组与常规药物组比较 ,比索洛尔治疗 3m o后有效者(87.7% )高于常规药物组 (6 6 .0 % ) ,P <0 .0 5 ;冠心病(87.9% )和扩张型心肌病心衰 (91.9% )疗效明显好于常规药物组 (分别为 6 6 .7% ,6 7.4 % ) ;治疗 6 mo后重度心衰者疗效(90 .0 % )明显好于常规药物组 (6 5 .4 % ,P <0 .0 5 ) .治疗后比索洛尔组 L VESD[(44 .8± 3.9) m m vs(48.8± 4 .6 ) mm],EF[(40 .7± 7.5 ) % vs (35 .7± 5 .2 ) % ]优于常规药物组 (P<0 .0 1) ;L VEDD,VE/ VA也较治疗前有明显改善 .结论　比索洛尔改善充血性心力衰竭临床症状 ,促进心脏收缩、舒张功能恢复 ,部分逆转心肌重塑 .     

Treatment of ulcerative colitis by traditional Chinese medicine and dynamic study of immune functions

The effect of the traditional Chinese medicinal herbs enema and enteric-coated capsules in the treatment of ulcerative colitis (UC) were compared in 260 cases. The immune complexes and the dynamic change of autoantibodies were monitored in 28 out of the 260 cases before and after treatment. The following results were observed. (1) There was no significant difference in the total effective rate between the enema group and the oral capsule group (93.3% and 87.5% respectively), but the recovery rates of purulent hemafecia, mucusfecia and erosion accompanying colitis, etc. in the former group were higher than those in the latter (P less than 0.01). (2) The circulating immune complexes were found 43 times above the normal range in 17 cases with positive rate 60.7%, and tended to decrease as the condition became better after treatment. Antinuclear antibodies were determined by the indirect fluorescent immune method and the indirect enzyme labelling method and the positive rates were 53.6% and 64.7% respectively, both being much higher than those in the controls (P less than 0.01).     

~(99)Tc-MDP对类风湿性关节炎患者外周血单核细胞产生细胞因子的影响

目的 :探讨“云克”(99Tc MDP)治疗类风湿性关节炎 (RA)的免疫机制。方法 :采用ELISA双抗体夹心法 ,观察“云克”体外对RA患者外周血单核细胞 (PBMC)产生白介素 1(IL 1)和可溶性白介素 2受体 (sIL 2R)的影响。结果 :“云克”有抑制RA患者IL 1的分泌及细菌脂多糖 (LPS)的促分泌作用 ,并对可溶性白介素 2受体的自发分泌及植物血素 (PHA)诱导分泌均有抑制作用。结论 :“云克”对RA的治疗机制可能与其降低IL 1和sIL 2R的作用有关     

宽叶缬草在抑制高胆固醇血症大鼠肾小管上皮细胞转分化中的作用

目的：探讨宽叶缬草在脂质肾损害肾小管上皮细胞转分化中的作用。方法：用含4％胆固醇和1％胆酸钠的高脂饲料饲喂大鼠建立高脂模型，观察宽叶缬草对大鼠血脂、尿蛋白和肌酐清除率的影响，以及对肾小管上皮细胞α－平滑肌肌动蛋白、波形蛋白、角蛋白表达的影响。结果：宽叶缬草有降低总胆固醇、低密度脂蛋白和尿蛋白的作用（P＜0．01），免疫组织化学法证实宽叶缬草在降脂和降尿蛋白的同时能降低肾小管上皮细胞α－平滑肌肌动蛋白、波形蛋白的表达（P＜0．01），抑制肾上管上皮细胞转分化。结论：宽叶缬草在脂质肾损害中的肾保护作用可能与在降脂基础上对肾小管上皮细胞表型转化的抑制有关。     

抑肽酶预处理防护大鼠肝脏缺血再灌注损伤的实验研究

目的 探讨抑肽酶预处理对肝脏缺血再灌注损伤的防护作用。方法 SD大鼠80只，随机分为抑肽酶预处理和生理盐水预处理两组，观察肝脏缺血再灌注损伤引起及抑肽酶预处理的影响。结果 拟肽酶预处理组大鼠缺血再灌注损伤引起的血清谷丙转氨酶（ALT），谷草转氨酶（AST）活性及肝组织丙二醛（MDA）含量变化均显著低于生理盐水预处理组（P＜0．01）；肝细胞形态学异常改变也明显较生理盐水预处理组轻。结论 抑肽酶预处理对大鼠肝脏缺血再灌注损伤有明显的防治作用。     

红细胞调控白细胞免疫功能新的自然实验研究体系

目的用血液免疫反应路线图实验体系评估红细胞在白细胞免疫活性中的作用。方法将0·3ml血浆加入0·2ml全血细胞悬液(全血细胞组)或0·2ml白细胞悬液(白细胞组)中,37℃温育1h,用免疫酶联法测定IL-8和IL-12水平,流式细胞仪测定白细胞膜CD4、CD8、CD35和CXCR4表达量。结果全血细胞组IL-8和IL-12水平(分别为5·96±4·26、9·84±2·23ρB·pg-1·ml-1)明显低于白细胞组(分别为15·09±9·86、13·59±3·69ρB·pg-1·ml-1,P<0·05),淋巴细胞CD4、CD35、CXCR4表达量(分别为37·79±12·00、154·66±70·00、34·40±20·45)明显高于白细胞组(分别为18·54±11·32、83·26±35·99、16·69±11·09,P<0.01),粒细胞CD35表达量(603·63±257·64)明显高于白细胞组(384·86±174·16,P<0.01)。成人全血细胞组淋巴细胞和粒细胞CD35和CXCR4表达量明显高于脐血全血细胞组(P<0·05或P<0·01)。结论红细胞是白细胞(包括T淋巴细胞、B淋巴细胞、NK细胞、树突状细胞、粒细胞等)免疫功能的调控者和指导者,脐血红细胞免疫调节功能明显下降;本研究为红细胞免疫调控活性测定提供了新的近似自然的方法。     

Laparoscopic Local Resection Based on Sentinel Node Evaluation for Early Gastric Cancer: A Preliminary Report

We previously reported that lymphatic mapping using isosulfan blue can be used to identify sentinel nodes (SNs). This study was undertaken to evaluate the feasibility of using the SN technique in treating early gastric cancer and to explore its usefulness for minimal invasive surgery. Twenty-three patients with early gastric cancer who underwent SN biopsy were retrospectively evaluated. Based on SN evaluation, individualized surgery was performed in five patients with T1N0M0 gastric cancer. When pathological examination of frozen sections revealed metastasis in SNs, we performed a standard D2 gastrectomy. Laparoscopic local resection was applied when the SN biopsy was negative. Our results showed that the success rate with SN biopsy in early gastric cancer was 100%, as were the accuracy, sensitivity, and specificity. All five patients with early gastric cancer had SNs negative for metastases both by frozen section and by postoperative pathology. Thus, all these patients underwent laparoscopic local resection without extended lymphadenectomy. We conclude that SN biopsy is a useful tool to individualize the operative procedure, and laparoscopic local resection can be safely performed using SN guidance in selected patients with early gastric cancer.