慢性乙型肝炎患者PBMC内IL4与IFN-γ mRNA的表达

目的阐明Th1/Th2类细胞因子与慢性乙型肝炎肝脏炎症活动的相关性以及这些细胞因子作为慢性乙型肝炎炎症活动调节剂的作用.方法用RT-PCR法检测慢性乙型肝炎患者外周血单个核细胞(PBMC)内白细胞介素-4(IL-4)及干扰素-γ(IFN-γ)mRNA的表达.结果在静息期,无明显的IL-4及IFN-γ mRNA的表达,在活动期IFN-γ的表达率(100%)明显高于恢复期(50%)(P＜0.05):相反,在恢复期IL-4 mRNA的表达率(87.5%o)明显高于活动期(12.5%)(P＜0.05).结论在慢性乙型肝炎发病机理中,在mRNA水平,IFN-γ作为正向免疫调节性细胞因子,而IL-4作为免疫抑制性细胞因子发挥作用,结果证实Th1细胞因子上调、Th2细胞因子下调慢性乙型肝炎肝脏炎症.     

Synthetic retinoid CD437 induces S-phase arrest and apoptosis in human prostate cancer cells LNCaP and PC-3

BACKGROUND: Exposure of prostate carcinoma cell lines to retinoids, which function through the classical retinoic acid nuclear receptor, (RARs) or retinoid X receptors (RXRs), results in minimal cytostatic inhibition of cell proliferation. METHODS: Growth inhibition and various regulatory responses were investigated in two human prostate carcinoma cell lines (LNCaP and PC-3) treated with or without a synthetic retinoid, CD 437. RESULTS: Incubation of prostate carcinoma cell lines with a novel retinoid CD437 resulted in the marked inhibition of proliferation. LNCaP and PC-3 possessed IC50 values for CD437 of 375 nM and 550 nM, respectively. Incubation with 1 microM CD437 for 24 hr resulted in 100% and 60% inhibition of growth in LNCaP and PC-3 cells, respectively. Simultaneously, cell flow cytometric analyses revealed a dramatic increase of the cell population in S phase, in both LNCaP (from 38.6% up to 86.7%) and PC-3 (27.9% to 55.7%), and a decreased proportion of cells in G2 phase, in LNCaP (from 23.7% down to 1.2%) and PC-3 (14.9% to 2.2%), indicating a significant S-phase arrest. The cell growth inhibition and S-phase arrest in these cells were followed by apoptosis, as revealed by the acquisition of the characteristic cell morphology including the appearance of apoptotic bodies, and further confirmed by cellular DNA fragmentation. CD437-induced-S phase arrest was associated with upregulated mRNA levels of p21waf1/cip1/sdi1 in both LNCaP (p53+/+) and PC-3 (53-/-) cells. CONCLUSIONS: CD437 represents a unique retinoid that induces S-phase arrest and apoptosis in both androgen-dependent (LNCaP) and -independent (PC-3) human prostate cancer cells, suggesting a potential role of CD437 in the treatment of human prostate cancer.     

直肠癌癌旁移行粘膜MTS1基因产物表达的意义

目的 探讨直肠癌癌旁移行粘膜（ＴＭ）的性质及多种种瘤抑制基因（ＭＴＳ１）基因缺失的临床意义。方法 应用粘液组化方法观察了直肠癌旁ＴＭ的范围,免疫组化方法观察了ＭＴＳ１基因产物表达情况,并与正常粘膜及癌组织进行对照 结果 ＭＴＳ１基因产物在正常直肠膜阳性表达率最高,在癌旁ＴＭ、癌组织表达逐渐减少,三者差异有显著意义（Ｐ〈０．０５）;ＭＴＳ１阴性的直肠癌病例,癌旁ＴＭ的明显高于ＭＴＳ１阳性的病例（Ｐ〉     

Performance of the Frameless IUD (Flexigard prototype inserter) and the TCu380A after six years as part of a WHO multicenter randomized comparative clinical trial in parous women

The clinical performance of the new Frameless IUD was compared with the TCu380A, the most widely used copper IUD in the world today. Insertions of the Frameless IUD were conducted with a prototype inserter (Flexigard). We report on the 6-year results from a randomized comparative clinical trial conducted at the Shanghai Institute of Planned Parenthood Research, as part of an international multicenter WHO clinical trial, involving 200 women, respectively recruited for use of each device. The cumulative 6-year pregnancy rates were 0.0 per 100 women for the Frameless IUD and 3.3 for TCu380A. Termination due to partial expulsion was significantly less for the Frameless IUD as compared with TCu380A (0.0 and 4.3 per hundred women, respectively). Complete expulsion, bleeding, pain, bleeding and pain and other medical reasons for termination did not differ significantly between the two devices. The net cumulative continuation rates at six years per 100 women were 80.8 for TCu380A, and 83.0 for the Frameless IUD.Both Frameless IUD and TCu380A are highly effective, safe and acceptable contraceptive devices, because of low pregnancy rates (per 100 women), and low termination rates due to expulsion, pain, bleeding, and bleeding and pain. Due to its anchoring, the Frameless IUD is significantly more effective than the TCu380A IUD as regards proper retention of the IUD in the uterine cavity. This may also explain its lower failure rate.     

低剂量γ-射线及香烟对仔鼠发育和反射行为的影响

母鼠暴露于低剂量γ－射线（照射源６０Ｃｏ,剂量为０、０．２５、０．５、１．０ＧＹ）及香烟烟雾水溶物（浓度为０、０．５、１．０、１．５、２．０支／只）,可使子代小鼠发育（开眼、张耳、生毛、出牙）及反射行为（平面翻正、空中翻正、视觉定向、听觉惊愕）出现不同程度的延迟。并且低剂量γ－射线与香烟烟雾水溶物还有极显著的协同效应。     

香附水提剂对离体兔肠管活动的影响

目的：探讨香附水提剂对离体兔肠平滑肌的作用。方法：采用Magnus实验装置,使用二道仪描记离体兔肠平滑肌收缩曲线5min作为对照,然后观察药物对其作用25min后曲线变化,并与对照组比较。结果：给香附水提剂后5min离体平滑肌收缩频率及幅度降低较阿托品对照组明显;5-15min二者接近;25min后降低幅度为阿托品组1.3倍,二者比较差异显著（P＜0.01）。结论：香阳水提剂能明显抑制离体兔肠平滑肌的收缩幅度与频率,同时也能拮抗乙酰胆碱和氯化钡所致离体肠管平滑肌的兴奋作用。     

IMS-972电解质分析仪的应用评价

目的：评价ＩＭＳ－９７２电解质分析仪的性能。方法：用ＩＭＳ－９７２电解质分析仪进行钾（Ｋ＋）、钠（Ｎａ＋）、氯（Ｃｌ－）、离子钙（ｉＣａ２＋）的测定,并对其准确度、精密度、线性范围、互染率等方面作了分析,并与ＡＶＬ９８８－３电解质分析仪进行相关性比较。结果：Ｋ＋、Ｎａ＋、Ｃｌ－、ｉＣａ２＋批内变异和批间变异分别为１．４３％、０．９６％、０．５１％、１．５１％和１．８５％、１．８７％、０．７９％、４．５０％;回收率为９７．５％～１０２．３％,１００．９％～１０５．８％,９９．０％～１０２．３％,８５．５％～９３．５％。ＩＭＳ－９７２与ＡＶＬ９８８－３所测定的结果进行相关性比较,Ｋ＋、Ｎａ＋、Ｃｌ－相关系数分别为０．９８５、０．９９４、０．９８９。结论：ＩＭＳ－９７２型电解质分析仪性能与相关技术指标能满足临床要求,与国外同类产品具有可比性。     

精神分裂症脑脊液中相对分子质量130 ku蛋白质含量增加的免疫学及临床意义

目的 研究精神分裂症脑脊液中存在的特异性ＩｇＧ抗体。方法 应用ＳＯＳ－聚丙烯酰胺凝胶电泳及蛋白印迹技术对精神分裂症脑脊液与对照脑脑液同时进行检查。结果 精神分裂症脑脊液中相对分子质量１３０ｋｕ的蛋白质含量显著增加,在蛋白印迹分析中发现此蛋白质可与羊抗人ＩｇＧ抗体发生免疫结合反应,结论 提示该蛋白质组分可能是一种与ＩｇＧ相关的蛋白质。     

蔗糖对红细胞膜脂流动性测定稳定性的影响

研究蔗糖对测定红细胞膜脂流动性稳定性的影响。应用荧光偏振技术测定膜脂流动性,并对比其在单纯悬浮液和含0．25mol／L蔗糖悬浮液中的测定结果的变异系数。结果在含有蔗糖悬浮液中测得结果的变异系数要比单纯悬浮液中的小3～5倍。结果表明,加入蔗糖对膜脂流动性的测定具有稳定性作用。     

冬虫夏草水提液对小鼠抗红细胞抗体产生的影响

采用相同浓度不同剂量的冬虫夏草水提液灌胃小鼠,了解其对小鼠抗红细胞抗体产生的影响。结果显示：高剂量组（５０ ｍｌ／ｋｇ） 、中剂量组（３３ ｍｌ／ｋｇ） 、低剂量组（１７ ｍｌ／ｋｇ）小鼠抗红细胞抗体明显高于对照组（Ｐ＜ ０－０５）,且３ 种不同剂量组之间比较也存在明显差异（Ｐ＜ ０－０５）,表明冬虫夏草可促进特异性抗体的产生,增强机体体液免疫功能。