江苏省部分城市男男性行为者HIV/STD感染情况研究

目的 了解男男性行为者（MSM）群体的艾滋病病毒/性病（HIV/STD）感染水平.方法 在MSM聚集的酒吧,在知情同意下,匿名填写问卷,自愿选择检查项目,在现场开展体检和实验室标本采集,标本按要求冷藏转送至实验室.结果 共检测了144人,平均年龄32.68岁,未婚者占59.03%,各种文化层次和职业者均有.他们中只有同性性行为者占38.64%,其他人均与异性有性行为.首次性行为的平均年龄为20.82岁.近3个月内被调查者有与异性的性行为及各种方式的性行为,且每次使用安全套者仅13.77%.其中11.11%的人报告曾被诊断有性病.现场体检发现尖锐湿疣患病率13.21%（14/106）.尿道分泌物检查淋球菌阳性率2.68%（3/112）,沙眼衣原体8.04%（9/112）,解脲脲原体25.00%（28/112）,生殖支原体4.46%（5/112）.血清学检查HIV抗体全部阴性,梅毒螺旋体明胶凝集试验（TPPA）阳性率18.75%（27/144）,快速血浆反应素试验（RPR）阳性率9.72%（14/144）,疱疹病毒抗体（HSV-2-IgG）阳性率7.78%（7/90）,乙型肝炎病毒表面抗原（HBsAg）阳性率9.68%（9/93）,丙型肝炎病毒抗体（抗-HCV）阳性率0（0/93）,戊型肝炎病毒抗体（抗-HEV）阳性率16.13%（15/93）.结论 MSM人群的性生活状态复杂并且缺乏安全性意识,成为HIV/STD传播的桥梁人群.他们中STD的感染水平较一般人群高,个别感染甚至接近性病门诊的感染水平,应该引起关注.     

Experiences with the human tumor colony-forming assay in gynecologic malignancies

Summary Tumor samples from 74 patients with gynecologic malignancies including breast cancer were processed in a soft agar colony-forming assay. None of the samples resulted in a pure single cell suspension. Of the 10 samples meeting our criteria of evaluability for chemosensitivity testing, only 5 samples showed in vitro sensitivity to any drug. Of the 3 evaluable correlations between in vitro and in vivo results, 2 were correct. Due to the low rate of evaluable samples the assay has only limited value in the assignment of chemotherapeutic drugs for patients treated at our institution.This work was supported in part by the Gesellschaft zur Bekämpfung der Krebskrankheiten Nordrhein-Westfalen     

Percoll离心联合多步差异黏附法分离、纯化人睾丸精原细胞

目的探讨分离、纯化人睾丸精原细胞的有效方法。方法用联合二步酶消化法获得人生殖细胞悬液,经Percoll不连续密度梯度离心,再用间隔不同时间(2、3、4h),不同次数(1、2次)差异黏附法纯化人精原细胞。结果未经纯化的精原细胞纯度为48.5%,间隔2、3、4h纯化1次所获得的精原细胞纯度分别为51.3%、59.0%、56.4%,纯度均高于未经纯化的纯度;间隔2、3、4h连续纯化2次所获精原细胞纯度分别为:57.7%、67.8%、57.8%,以间隔3h纯度最高;与间隔同样时间纯化1次精原细胞纯度相比,间隔2、3h纯化2次高于1次,间隔4h纯化2次与1次无明显差别。结论Percoll不连续密度梯度离心联合不同时间间隔差异黏附法可以有效地对人精原细胞进行分离和纯化;间隔2、3h,纯化2次高于1次;连续纯化2次时,间隔3h效果最佳。     

Behavioral Impairment Under Alcohol: Cognitive and Pharmacokinetic Factors

This study tested the hypothesis that the intensity of behavioral impairment under alcohol is related to social drinkers' expectancies about impairment and their rates of rise in blood alcohol concentration (BAC). After subjects ( n = 30) were trained on a psychomotor task, they rated the impairment they expected from alcohol and then performed the task under alcohol (0.56 g/kg) or a placebo. Alcohol impaired performance, compared with placebo. Drinkers' expectations about impairment and their rates of rise in BAC were independent, and each factor predicted a significant portion of the variance in alcohol impairment among drinkers. More intense impairment under alcohol was associated with expectations of greater impairment and with swifter rates of rise in BAC. BACs obtained by drinkers during task performance were not related to the intensity of impairment they displayed. The study shows that a pharmacological and nonpharmacological variable can each affect a drinker's behavioral impairment under alcohol, and this finding contributes to our understanding of conditions where BAC per se may be an unreliable indicator of impairment.     

云南省耿马县鼠疫疫源地及人间鼠疫调查报告

1990年12月11日～31日,对云南省耿马县首次鼠疫流行进行了现场调查。用血清学及细菌学方法在33个疫点(180km~2)检出了63例腺鼠疫患者和13例隐性感染者,并从人,鼠、蚤分离到49株鼠疫菌。造成鼠间鼠疫流行,主要是黄胸鼠数量及印鼠客蚤指数的急骤增高;人间鼠疫是由于鼠间鼠疫长期流行,地面游离蚤增加,人与蚤类接触频繁所致。结果表明:耿马县以勐撒镇为中心的鼠间及人间鼠疫大面积流行是一次典型的家鼠型鼠疫,其疫源地具有西南山地黄胸鼠鼠疫疫源地的特征。鼠疫在该县(至少在动物间)有可能长期存在。     

人囊虫病T淋巴细胞亚群及血清IgE的变化

应用直接ＳＰＡ菌花环法对２７例囊虫病患者外周血Ｔ淋巴细胞亚群进行检测，同时用ＥＬＩＳＡ法测定血清ＩｇＥ水平。发现患者ＣＤ３＋，ＣＤ４＋细胞的百分率明显降低，ＣＤ４／ＣＤ８比值明显下降，血清ＩｇＥ含量显著升高。经分析，患者ＣＤ４细胞、ＣＤ４／ＣＤ８比值与ＩｇＥ对数值呈负相关。揭示囊虫病患者Ｔ细胞亚群比例失调，免疫功能紊乱。本文对可能的免疫调节机制和发病机理进行了探讨。     

肠道T细胞淋巴瘤临床特点

肠道T细胞淋巴瘤（intestinal T-cell lymphoma，ITCL）病情凶险，临床表现复杂，以非特异性症状为主。发病年龄轻，无明显的乳糜泻，EB病毒检出率高，回盲部、升结肠和降结肠受累多见是我国患者的特点，与西方国家报道不同。ITCL由于临床少见，极易误诊，且易复发，对治疗的反应和预后极差，死亡率高，应引起临床医师的广泛重视。     

Ad-p27mt转染重组腺病毒治疗裸鼠内人胃癌的分子机制

目的:研究Ad-p27mt转染重组腺病毒对人胃癌细胞凋亡的作用及机制.方法:Ad-p27mt转染重组腺病毒导入胃癌细胞株SGC-7901内;流式细胞仪检测凋亡染色体亚二倍体峰值,了解Ad-p27mt对人胃癌组织凋亡的作用;TUNEL法检测DNA片断,在Ad-p27mt组和Ad-LacZ组中分析细胞的凋亡.结果:Ad-p27mt成功转入人胃癌细胞SGC-7901内,转化率达100%.流式细胞仪检测发现在感染后18h出现G1-S相前出现凋亡染色体亚二倍体峰值,并且DNA电泳出现凋亡特征性的条带;TUNEL法检测Ad-p27治疗组与对照组的凋亡率分别是92.3%±3.76%和2.01%±0.15%,两组的差异有显著性(P<0.01).结论:重组腺病毒转染的人p27突变基因能诱导裸鼠体内人胃癌细胞SGC-7901的凋亡.     

Comparisons of prostaglandin vasoactive effects and interactions in the in vivo microcirculation of the rat urinary bladder

A combination of techniques for in vivo transillumination, topical application of vasoactive agents, and direct microscopic observation of microcirculatory responses was utilized to evaluate the vasomotor actions of prostaglandins (PGs) E₁, E₂, F_1α, F_2α, A₁, and A₂ on rat urinary bladder arterioles and venules. The effects of PGE₁ and histamine (HIS) on arteriolar responsiveness to norepinephrine (NE), serotonin (5-HT), and PGF_2α were measured. Histochemical studies were completed to determine the primary site of prostaglandin (PG) metabolic deactivation in the urinary bladder. Arteriolar dilatation occurred with HIS, PGE₁, PGE₂, PGA₁, PGA₂, and PGF_1α, all of which (with the exception of HIS) demonstrated significant dose-related responses. Overall, PGE₁ and PGE₂ were of greatest potency. Significant dose-related arteriolar constriction occurred with NE > PGF_2α > 5-HT (in order of decreasing potency). HIS, PGE₁, PGE₂, and PGA₁ produced significant venular dilatation; PGE₁ and HIS were dose related. Only NE resulted in significant venoconstriction. Arteriolar responsiveness to NE and PGF_2α decreased after pretreatment with PGE₁ but was unchanged by HIS pretreatment, whereas application of 5-HT following pretreatment with PGE₁ or HIS produced equivalent levels of arteriolar constriction. The primary site of deactivation of PGE₁ was histochemically localized to bundles of smooth muscle fibers in the muscular coat of the rat urinary bladder wall.