云南省地方性不明原因猝死危险因素的病例对照研究

目的 探讨可能引起云南省地方性不明原因猝死的危险因素,为制订确实有效的预防措施提供依据.方法 在猝死病区选择病例22人,在非病区选择对照24人,对病例和对照采用统一的调查表进行现场询问,应用SPSS 13.0统计软件进行单因素X2检验及多冈素lobistic回归筛选可疑危险因素,建立并评价最优回归模型.结果 经单因素X2检验,发现餐具存放位置、家中有无牲畜圈、发病前是否食用蕈子、发病前是否接触农药杀虫剂、发病前是否气候骤变5个可疑因素具有统计学意义(X2值分别为12.206、4.779、5.741、6.120、10.754,P<0.05);经多因素logistic回归筛选出食用蕈子为保护性因素[比值比(OR)=0.115,P<0.05)],气候骤变为危险因素(OR=36.592,P<0.01).结论 气候骤变可能是云南省地方性不明原因猝死的发病诱因,在猝死高发季节到来前食用蕈子可以起到一定的预防作用.     

克山病病区粮食和酱块对鸡骨关节和心脏的影响

目的探讨克山病病区低硒玉米和酱块对鸡骨关节和心脏病理损伤的影响。方法将“京白905”鸡雏80只,按体重随机分为4组,以克山病病区玉米及酱块为原料,配比不同氨基酸合成饲料喂养。饲养4个月后处死,光镜下观察鸡骨关节和心脏病理改变。结果鸡骨关节病变实验组检出率分别为33．33％、22．22％、22．22％,对照组检出率33．33％。组间差异无统计学意义（x2=0．825,P〉0．05）。心肌病变实验组检出率分别为6．67％、11．11％、11．11％,对照组无病变。组间差异无统计学意义（x2=0．543,P〉0．05）。结论克山病病区粮食可导致鸡骨关节和心肌出现病理性损伤。克山病病区酱块可能为保护因素。     

1990～2006年地病中心克山病研究所发表论文的影响力分析

目的分析中国疾病预防控制中心地方病控制中心克山病防治研究所1990～2006年发表科研论文情况。方法从研究所科技存档资料中查询1990～2006年发表的论文资料,采用普赖斯定律分析核心作者。在CNKI数据库中按照第一作者和发表时间进行检索,记录被引用情况并进行描述性统计分析。结果1990～2006年研究所在国内外59种杂志上发表论文419篇,其中实验研究论文270篇（64．4％）,流行病学调查62篇（14．9％）,临床医学研究87篇（20．7％）;第一作者96人,核心作者40人,占第一作者总数的41．7％,核心作者共发表论文322篇（76．85％）。419篇文献中被CNKI收录267篇,有引证文献167篇,总被引频次726,单篇论文最高被引频次为43,平均被引频次为2．72。结论克山病研究所已经形成核心作者群;发表的论文有一定的学术影响力。     

克山病病区玉米饲料及酱块与大鼠骨骼肌、心肌病变损伤关系的实验研究

目的探讨克山病病区产玉米饲料和酱块对大鼠骨骼肌、心肌损伤的作用。方法按体重将健康雄性W istar大鼠随机分成3组,每组10只,分别饲以病区玉米、病区玉米加酱块、非病区玉米3种饲料;高效液相色谱法检测酱块中的黄绿青霉菌毒素和镰刀菌毒素;每月称量大鼠体重;1、3个月时检测大鼠尾静脉全血谷胱甘肽过氧化物酶（GSH-Px）活力;6个月时光镜观察大鼠心肌、骨骼肌病理改变。结果未检测到酱块中有致心肌、骨骼肌损伤的真菌毒素;1、2、3月各组大鼠体重差别均有统计学意义（F=3.49,P〈0.05;F=9.93,P〈0.05;F=6.068,P〈0.05）,总体来看病区玉米加酱块组体重状况较好;1个月和3个月两次GSH-Px活力检测结果显示,非病区玉米组均高于病区玉米组和病区玉米加酱块组;3组心肌损伤发生率两两经确切概率F isher检验,差异无统计学意义（P=1.000,P=0.545,P=1.000）,未发现明显的骨骼肌病理损伤。结论病区玉米喂养大鼠,影响其全血谷胱甘肽过氧化物酶（GSH-Px）活性;单独喂养病区玉米饲料6个月,未见实验大鼠有意义的心肌和骨骼肌损伤;未观察到酱块有致心肌、骨骼肌损伤的作用。     

硒和蛋白质与大鼠心肌GPX1、GPX4表达及翻译

目的研究硒和蛋白质对大鼠心肌GPX1、GPX4表达及其翻译过程的影响。方法 60只雄性Wistar大鼠按硒与蛋白质两因素两水平的析因设计随机分为四组,饲养一年后处死,western blot方法检测心肌GPX1、GPX4和SBP2蛋白表达水平;RT-PCR方法扩增心肌GPX1、GPX4 mRNA上SECIS序列,SSCP法确定其基因型后进行碱基序列测定。结果低硒组心肌组织GPX1、GPX4含量低于常硒组（P〈0.001;P〈0.05）,SBP2含量高于常硒组（P〈0.05）;低蛋白组心肌组织GPX1含量低于常蛋白组（P〈0.001）,SBP2含量高于常蛋白组（P〈0.05）;硒与蛋白质在影响心肌GPX1表达方面有交互作用（P〈0.001）;GPX1、GPX4基因的SECIS碱基序列并未发生变异。结论在低硒低蛋白条件下,心肌GPX1和GPX4含量显著降低,而SBP2含量则增加;GPX1、GPX4基因的SECIS碱基序列并未发生变异。     

硒和蛋白质对大鼠心肌蛋白质及DNA修复酶的影响

目的 研究低硒低蛋白引起的氧化应激对大鼠心肌蛋白质及DNA修复酶的影响.方法 60只健康雄性Wistar大鼠,按体重随机分为4组,每组15只:低硒低蛋白组(A)、常硒低蛋白组(B)、低硒常蛋白组(C)和常硒常蛋白组(D),饲养1年.处死后,采用2,4-二硝基苯肼(DNPH)比色法检测大鼠心肌蛋白质羰基的含量;提取心肌组...     

克山病患者抗氧化能力测定

Objective To explore the relationship between myocardial damage and antioxidant capacity in vivo of Keshan disease patients and to analyze the possible pathogenesis. Methods In the period from 2005 to 2006, 41 chronic and latent Keshan disease cases were chosen as the case group from such serious endemic areas as Yongjin Village, Xinfa Village of Fuyu County, Fuan Village of Shangzhi County, Xinghuo Village of Wudalianchi County, 61 healthy people from the same area as internal controls, 48 healthy people from Xianglansan Village of Wangkui County, an un-endemic area, as external control. Fasting peripheral venous blood was collected from all the people. And blood selenium, glutathione peroxidase(GSH-Px) and suporoxide dismutase.(T-SOD) activities, malondialdehyde (MDA) levels were examined. Results Blood selenium level of the patient group [(34.80±13.30) μg/L], GSH-Px[(104.10±34.19)U/L]and T-SOD[(92.16±17.98)×103 U/L]actives were significantly lower than the internal control group [(41.24±13.57)μg/L, (118.57±25.49)U/L, (104.82±13.56)×103 U/L]and the external control group [(48.33±16.51)μg/L, (155.00±24.01)U/L, (108.48±12.73)×103 U/L], respectively, with a statistically significant difference(all P < 0.05). MDA level of the patient group[(7.12± 1.37)μmol/L]was higher than that in the internal control group[(5.36±1.18)μmol/L]and the external control group[(5.22±0.83)μmol/L]with a statistically significant differences(both P < 0.05). The blood selenium level, GSH-Px activity of internal control group was resoectively lower than that in the external control group, the differences being statistically significant(beth P < 0.05). Conclusions Selenium deficiency may lead to reduced antioxidant capacity and enhanced oxidative damage in Keshan disease patients in vivo. There may be a certain relationship between oxidative stress disorder and myocardial damage of Keshan disease.     

克山病患者抗氧化能力测定

Objective To explore the relationship between myocardial damage and antioxidant capacity in vivo of Keshan disease patients and to analyze the possible pathogenesis. Methods In the period from 2005 to 2006, 41 chronic and latent Keshan disease cases were chosen as the case group from such serious endemic areas as Yongjin Village, Xinfa Village of Fuyu County, Fuan Village of Shangzhi County, Xinghuo Village of Wudalianchi County, 61 healthy people from the same area as internal controls, 48 healthy people from Xianglansan Village of Wangkui County, an un-endemic area, as external control. Fasting peripheral venous blood was collected from all the people. And blood selenium, glutathione peroxidase(GSH-Px) and suporoxide dismutase.(T-SOD) activities, malondialdehyde (MDA) levels were examined. Results Blood selenium level of the patient group [(34.80±13.30) μg/L], GSH-Px[(104.10±34.19)U/L]and T-SOD[(92.16±17.98)×103 U/L]actives were significantly lower than the internal control group [(41.24±13.57)μg/L, (118.57±25.49)U/L, (104.82±13.56)×103 U/L]and the external control group [(48.33±16.51)μg/L, (155.00±24.01)U/L, (108.48±12.73)×103 U/L], respectively, with a statistically significant difference(all P < 0.05). MDA level of the patient group[(7.12± 1.37)μmol/L]was higher than that in the internal control group[(5.36±1.18)μmol/L]and the external control group[(5.22±0.83)μmol/L]with a statistically significant differences(both P < 0.05). The blood selenium level, GSH-Px activity of internal control group was resoectively lower than that in the external control group, the differences being statistically significant(beth P < 0.05). Conclusions Selenium deficiency may lead to reduced antioxidant capacity and enhanced oxidative damage in Keshan disease patients in vivo. There may be a certain relationship between oxidative stress disorder and myocardial damage of Keshan disease.     

单纯肥胖症与2型糖尿病的关系

选择正常对照组、单纯肥胖症患者、2型糖尿病(T2DM)患者各300例,检测体质量指数(BMI)、腰围臀围比(WHR)、超敏C反应蛋白(hsCRP)、游离脂肪酸(FFA)、空腹血糖(FPG)和餐后2 h血糖(2hBG)、同步胰岛素(FINS),并计算胰岛素抵抗指数(HOMA-IR).结果 发现,正常组FPG、2hBG、hsCRP、FFA、FINS、HOMA-IR低于肥胖组与糖尿病组;hsCRP、FFA、HOMA-IR、WHR等在肥胖组与糖尿病组无明显差异.BMI、hsCRP、FFA、WHR与FINS、HOMA-IR、FBG、2hPG呈正相关.认为hsCRP、FFA是2型糖尿病的危险因子.