精神分裂症与G72基因多态性的关联

目的：探讨在云南省汉族人群中D-氨基酸氧化酶激活基因（G72）多态性与精神分裂症的关联性。方法：采用聚合酶链式反应-限制性片段长度多态（PCR-RFLP）方法,在云南汉族276例精神分裂症患者和312例健康对照者中进行G72基因3个多态位点（rs9558562,rs45476401,rs3918341）的分型。结果：各位点在病例组和对照组中基因型分布均符合Hardy-Weinberg平衡。无论在男女混合样本,还是分别在男性、女性样本中,rs9558562,rs45476401,rs3918341在病例组和对照组间的等位基因频率分布差异均无显著性（P均〉0.05）。结论：G72基因rs9558562,rs45476401和rs3918341多态与云南汉族精神分裂症发病无显著相关。     

武汉地区汉族老年男性骨质疏松危险因素的相关研究

目的本研究通过病例-对照研究分析武汉地区汉族老年男性骨质疏松的危险因素。方法共选取武汉市第一医院老年科2015年2月至2016年10月住院的武汉地区汉族老年男性人群原发性骨质疏松症患者110例和同期住院无骨质疏松症对照者85例,通过两组患者各因素的比较,应用多元Logistic回归分析筛选武汉市汉族老年骨质疏松的危险因素。结果通过对195例样本的分析,多因素Logistic分析显示:年龄≥60岁(OR1.088,95%CI 1.033~1.147),高体重指数BMI(OR1.319,95%CI 1.170~1.486),动脉收缩压升高(OR1.055,95%CI 1.022~1.089)、空腹血糖增高(OR1.208,95%CI 1.001~1.458)、klotho基因G395A AA基因型(OR2.969,95%CI 1.092~8.068)为武汉地区汉族老年男性患者发生骨质疏松的独立危险因素。结论研究揭示年龄、高体重指数、高收缩压、高空腹血糖、klotho基因可能在武汉地区汉族老年男性骨质疏松发病机制中起重要作用,其中klotho基因G395A位点AA基因型可能是武汉市汉族老年骨质疏松患者的致病基因。上述因素对决定武汉地区老年男性骨质疏松患者抗骨质疏松治疗策略具有重要意义。     

Development of the decision tree model for distinguishing individuals of Chinese four surnames from Zhanjiang Han population based on Y-STR haplotypes

Co-separation studies between surnames and Y chromosome genetic markers are beneficial to revealing population migrations, surname origins, population formation histories and forensic familial searching. Genetic distributions of 27 Y-STRs in Chinese four surnames (Li, Lin, Chen and Huang) from Zhanjiang Han population were investigated. Meanwhile, we tried to develop a decision tree model for surname predictions based on Y-STR haplotypes. Allelic frequencies of 27 Y-STRs showed that unique alleles were only observed in a certain surname; besides, some alleles displayed higher frequencies in a certain surname than those in other surnames, implying these alleles might be employed as the useful indicators for surname predictions. Haplotype match probability values of 27 Y-STRs in these surnames revealed that the system could be used as a valuable tool for forensic male identification. The developed decision tree model performed well for the training set with the accuracy of 0.9860 and obtained the relatively high accuracy (>0.70) for surname predictions of the testing set. To sum up, we explored the power of the machine learning to the surname predictions based on obtained Y-STR haplotypes, which showed promising application values in forensic familial searching.     

The imprint of China’s first emperor on the distant realm of eastern Shandong

Imperial expansion is recurrent in human history. For early empires, such as in ancient China, this process generally is known from texts that glorify and present the perspective of victors. The legacy of the Qin king, Shihuangdi, who first unified China in 221 BC, remains vital, but we have few details about the consequences of his distant conquests or how they changed the path of local histories. We integrate documentary accounts with the findings of a systematic regional survey of archaeological sites to provide a holistic context for this imperialistic episode and the changes that followed in coastal Shandong.     

宁夏回汉族 KCNQ1基因多态性与2型糖尿病的相关性研究

目的：探讨 KCNQ1基因 rs231362位点的多态性对宁夏地区回汉民族2型糖尿病易感性的影响。方法采用 PCR －RFLP 技术对宁夏地区回族、汉族的 KCNQ1基因 rs231362多态性基因型及等位基因频率在正常糖耐量人群和2型糖尿病人群中的分布进行分析。结果（1）两个民族中,KCNQ1基因 rs231362多态性在同民族2型糖尿病组和正常糖耐量组的分布差异无统计学意义;（2）KCNQ1基因 T 等位基因的分布频率在两个民族大致相同,回族 T 等位基因频率为0．05,低于本组汉族人群;（3）两个民族正常糖耐量人中,CC 组与 TC ＋TT 组各指标相比差异无统计学意义（P ＞0．05）,而在糖尿病组,回族与汉族 T 等位基因携带者（CT ＋TT）腰围水平 BMI 和腰臀比显著高于 CC 组（P ＜0．05）,而低密度脂蛋白水平低于 CC 组（P ＜0．05）。结论KCNQ1基因变异与宁夏地区两个民族2型糖尿病不相关。KCNQ1基因 rs231362多态性 CT ＋TT 基因型可能与回汉族2型糖尿病的腹型肥胖有关,且携带 T 等位基因者可能对回族2型糖尿病患者的血脂具有调节作用。     

贵州地区汉族人群GDF5基因单核苷酸多态性与成人终身高的关系

目的 探讨生长分化因子5(GDF5)基因rs143383、rs143384、rs6060369和rs224331位点单核苷酸多态性(SNPs)与贵州地区汉族人群成人终身高的相关性.方法 对贵州地区1 069例汉族健康体检者进行体格检查及问卷调查,收集抗凝血标本并提取DNA.用基质辅助激光解吸电离飞行时间质谱(MALDI-TOF MS)方法检测GDF5基因的SNPs,并分析其与身高的相关性.结果 成年女性中,GDF5基因rs143383、rs143384、rs6060369和rs224331基因型分布可分别解释身高变异的1.4％、0.9％、1.1％和1.0％(P＜0.05);在GDF5基因rs143383和rs143384位点,携带GG基因型的个体平均身高均为最高,分别比AG和AA基因型个体高1.7 cm (P＜0.01)、2.3 cm (P＜0.05)和1.6 cm (P＜0.05)、2.1 cm(P＜0.01);在GDF5基因rs6060369位点,携带CC基因型的个体平均身高分别比CT和TT基因型个体高1.7 cm (P＜0.05)和2.2 cm (P＜0.01).但是在成年男性中未发现GDF5基因上述SNPs位点与身高的相关性.结论 GDF5基因单核苷酸多态性与贵州地区成年汉族女性身高有关,GDF5基因可能是影响中国汉族成人女性身高个体差异的基因.     

Effect of manganese chloride and Verapamil on automaticity of digitalized Purkinje fibers.

The effects of manganese chloride (MnCl2) and verapamil on automaticity of digitlazied Purkinje fibers were studied using conventional microelectrode techniques. The stduied wer made in isolated, spontaneously beating Purkinje prearations. Quabain alone consistently increased the automatic rate, whereas no such increase was observed when the preparations were superfused with a mixture of ouabain adn MnCl2. MnCl2 was also shown to be effective is suppressing the enhanced automaticity induced by ouabain. Mncl2 alone did not have a significant effect on the spontaneous rate of Purkinje fibers. The effect of verapamil was similar to that of MnCl2 in preventing and suppressing the ouabain-induced increase in automaticity. MnCl2 and verapamil have been shown to inhibt tha slow inward calcium current of cardiac fibers. The results therefore suggest that an inward calcium ion current may play a role in the development of digitalis-induced increase in the stope of phase 4 depolarization in Purkinje fibers.