光照疗法所致新生儿溶血的机理及其预防

观察了接受短时间（≤４８小时）光照疗法（光疗）治疗的高胆红素血症患儿红细胞谷胱甘肽还原酶（ＧＲ）活性的改变，光疗可使红细胞谷胱甘肽还原酶活性下降，使高胆红素血症患儿溶血加剧。红细胞谷胱甘肽还原酶活性下降是由于维生素Ｂ２的光降解，致体内维生素Ｂ２不足所致。补充维生素Ｂ２可以纠正红细胞谷胱甘肽还原酶活性，从而防止光疗造成的溶血副作用。因此高胆红素血症新生儿在光疗期间常规补充维生素Ｂ２是必要的。     

Exposure and airway effects of seafood industry workers in northern Norway

OBJECTIVE: In this study, we explored airway symptoms and exposure to bioaerosols and exhaust gases in seafood industry plants. METHODS: The study details the results from personal and environmental exposure measurements (17 plants), a questionnaire (n = 984), and clinical examinations (n = 225). RESULTS: The workers were exposed to allergens, endotoxins, molds, and exhaust. The 1-year prevalence of work-related airway symptoms was 42.8% for production workers and 25.9% for administrative workers. Mean levels of forced expiratory volume in 1 second and forced vital capacity were less than the predicted values in all exposed nonsmoker groups. A total of 20.5% had increased levels of total IgE (>/=100 kU/L). Specific IgE-mediated reactions seemed to be relevant only in the shrimp industry. CONCLUSIONS: Seafood industry workers showed a high prevalence of work-related airway symptoms. Further research on the relationship between exposure and effects is necessary.     

直肠癌p21,p53基因表达的免疫组化研究

采用ＳＰ免疫组化法,对１１０例直肠癌手术后石蜡包埋标本进行ｐ２１、ｐ５３基因表达检测,同时选用同一病例肠壁断端的正常肠壁组织为实验对照组。结果显示,直肠癌组织中ｐ２１、ｐ５３基因表达阳性率分别为５４．５％、４２．７％。ｐ５３表达与直肠癌的临床病理因素及预后无相关性;ｐ２１表达阴性病例预后好。Ｐ２１表达与组织分化、淋巴结转移有相关性本实验提示,直肠癌的发生发展与ｐ２１、ｐ５３基因有关,ｐ２１阴性表达     

toll样受体9基因多态性与hbv感染结局的相关性研究

目的 研究toll样受体(tlr)9基因单核苷酸多态性(snp)与hbv感染临床转归的相关性.方法 应用实时荧光定量pcr方法检测96例慢性乙型重型肝炎患者、156例慢性乙型肝炎患者和151例hbv感染自发清除者tlr9基因启动子区a-1923c、t-1486c、t-1237c 3个位点的snp分型,分析各位点的基因型及组间差异.计量资料采用方差分析,计数资料采用χ2或fisher精确概率法检验.结果 tlr9基因a-1923c位点ac基因型在慢性乙型肝炎组的频率(3.8%)低于hbv感染自发清除组(11.3%)(χ2=6.082,p＜0.05),但在慢性乙型重型肝炎组(8.3%)与hbv感染自发清除组间基因型频率分布没有统计学差异(χ2=0.552,p＞0.05);重型肝炎组与自发清除组、慢性乙型肝炎组与自发清除组间t-1486c和t-1237c位点的基因型频率分布差异无统计学意义(χ2值分别为1.534和0.745,p值均＞0.05).结论 tlr9基因a-1923c位点ac基因型与hbv感染的自发清除存在相关性,但与hbv感染的慢性化和重症化无明显相关性;t-1486c、t-1237c位点的基因多态性与hbv感染结局之间没有相关性. abstract： objective to investigate whether the clinical outcomes of hbv infection are associated with single nucleotide polymorphisms of toll-like receptor (tlr) 9 gene promoter region.methods the polymorphisms of three positions at tlr9 gene promoter region including a-1923c, t-1486c and t-1237c were detected using real-time fluorescence quantitative polymerase chain reaction in 96 patients with severe chronic hepatitis b, 156 patients with chronic hepatitis b and 151 cases of hbv spontaneous clearance, then the differences between the groups were analyzed.analysis of variance was performed for measurement data,and χ2 test or fisher exact probability test were used for enumeration data.results the frequency of ac genotype at tlr9 gene a-1923c site in chronic hepatitis b group was 3.8%, which was significantly lower than that in hbv spontaneous clearance group (11.3%) (χ2=6.082, p ＜ 0.05), but no significant difference was found between severe chronic hepatitis b group (8.3%) and hbv spontaneous clearance group (χ2=0.552, p ＞0.05).no significant differences of genotype distribution were found between chronic severe hepatitis b group and hbv spontaneous clearance group , chronic hepatitis b group and hbv spontaneous clearance group at polymorphism sites of t-1486c and t-1237c (χ2=1.534 and 0.745, p ＞ 0.05).conclusions genotype ac at tlr9 gene a-1923c site is associated with hbv spontaneous clearance, but not correlated with chronic hbv infection and liver failure; there is no correlation of polymorphisms in t-1486c and t-1237c at tlr9 gene promoter region with the clinical outcomes of hbv infection.     

载脂蛋白E基因型与阿尔茨海默病及其血清总胆固醇水平的关系

目的　研究中国汉族人载脂蛋白 E等位基因频率的分布和比较等位基因ε2、ε3和ε4携带者血清总胆固醇水平的差异。方法　应用聚合酶链式反应 -限制性片段长度多态性技术对 4 2例阿尔茨海默病 ( AD)患者和 4 0例健康老年人的载脂蛋白 E基因型进行分析 ,并对其血清总胆固醇水平进行检测。结果　在 AD组中 ,等位基因 ε2、ε3和 ε4频率分别为 6 .0 %、6 7.9%和 2 6 .1 % ;对照组为 8.8%、81 .2 %和 1 0 .0 % ;整个研究人群为 7.3%、74 .4 %和 1 8.3%。检测的平均血清总胆固醇水平 ,ε2携带者最低 ,ε4携带者最高。结论　中国汉族人载脂蛋白Eε4等位基因频率比西方人低 ,可以部分地解释汉族人 AD的低发病率。载脂蛋白 E基因型与血清总胆固醇水平的相关情况 ,中国汉族人和西方人相似。高血清总胆固醇水平可能是 AD的危险因子之一 ;载脂蛋白 Eε4等位基因之所以是 AD的危险因子之一 ,或许是由高血清总胆固醇水平所介导     

孟氏骨折伴桡神经骨间背侧支损伤的治疗

目的 对孟氏骨折合并桡神经骨间背侧支损伤的原因，临床表现，治疗结果进行分析。方法 自1990-2000年5月共诊治了6例患者，均为儿童。新鲜骨折手法复位石膏外固定3例，切开复位尺骨钢板内固定2例，均未做神经探查；陈旧性骨折尺骨畸形矫正 神经探查1例。结果 新鲜骨折合并神经损伤5例均自行恢复，陈旧性骨折畸形矫正神经探查术后半年恢复肌力3级。结论 孟氏骨折合并桡神经骨间背侧支损伤大多数为神经牵拉伤经观察保守治疗能够恢复，但应当注意少见的桡神经嵌顿在肱桡关节时必须早诊断和手术探查。     

青年人原发性支气管肺癌

 报道经病理学证实的29例30岁以下青年人肺癌病例,着重讨论了青年人肺癌的年龄划分问题、临床及X线表现特点和误诊原因,认为青年人肺癌不能单纯按Schwart's法计算肿块倍增时间来推断肺癌的组织类型。