Association between serotonin transporter gene polymorphisms and non-lesional temporal lobe epilepsy in a Chinese Han population

Serotonin （5-hydroxytryptamine, 5-HT） influences the cortical and subcortical excitatory/inhibitory balance and participates in the pathophysiological processes of epilepsy. The serotonin transporter （5-HTT） is the most important factor in serotonin inactivation. We tested whether 5-HTT polymorphisms are involved in the pathogenesis of epilepsy in Chinese Han population. We did not find a significant difference in the frequencies of genotypes and alleles in the 5-HTT gene-linked poLymorphic region （5-H-I-FLPR） in patients with non-lesional temporal lobe epilepsy and normal controls （P〉 0.05）. Frequencies of the 5-H1-1- intron 2 variable number tandem repeat （5-HTTVNTR） 12/12 genotype and allele 12 were higher in the patients with non-lesional temporal lobe epilepsy than normal controls （P 〈 0.01）. The odds ratio of affecting non-lesional temporal lobe epilepsy was 1.435 （95% Cl, 1.096 1.880） in patients carrying allele 12 （P 〈 0.05）. Although the 5-HTTLPR may not be a genetic locus of non-lesional temporal lobe epilepsy in Chinese Hart population, allele 12 in the 5-HTTVNTR may correlate with non-lesional temporal lobe epilepsy. The Stin2.12 allele and 12/12 genotype could be predisposing to non-lesional temporal lobe epilepsy.

Association of serotonin transporter gene polymorphisms and major depressive disorder in Chinese Han population

BACKGROUND： Serotonin transporter （5-HTT） polymorphisms comprise 5-HTT gene-linked polymorphism region （5-HTTLPR） and variable number of tandem repeats （VNTR）. Studies have revealed an association between 5-HTT polymorphism and major depressive disorder, which suggests that the ＂S＂ allele of 5-HTTLPR and Stin2.9 of 5-HTTVNTR are associated with major depressive disorder. However, there are a number of studies that do not support the 5-HTT polymorphism effect in major depressive disorder. OBJECTIVE： To study the relationship between 5-HTT gene polymorphism and major depressive disorder in Chinese Han population. DESIGN, TIME AND SETTING： Case-controlled study of 5-HTT gene polymorphism. The experiment was performed at the Central Laboratory, Third Affiliated Hospital of Sun Yat-sen University, China from March 2005 to January 2006. PARTICIPANTS： A total of 99 depressive patients of Chinese Han nationality were recruited for this study. All patients met DSM-IV diagnostic criteria for major depressive disorder and had a total score of Hamilton Depression Scale （24 items） ≥21 points. In addition, 101 healthy subjects, matched for age and gender, served as the control group. METHODS： Venous blood was collected from all subjects. 5-HTT genotypes and alleles were determined by polymerase chain reaction. Consistent with the Hardy-Weinberg equilibrium, the association between 5-HTT gene polymorphism and major depressive disorder were analyzed by Chi-square test. MAIN OUTCOME MEASURES： 5-HTTLPR and 5-HTTVNTR genotypes and allele frequencies were measured. RESULTS： No significant differences in 5-HTTLPR genotypes and allele frequencies were determined between patients and controls （P 〉 0.05）. However, significant differences in 5-HTTVNTR genotypes and allele frequencies were detected （P 〈 0.01 ）. The Stin2.10 allele and 10/10 genotype associated with major depressive disorder （OR = 2.61,7.7, P 〈 0.05; analysis of dose-response relationships Х^2 = 12.35, P 〈 0.01）. CONCLUSION： Results from the present study revealed no association between 5-HTTLPR and major depressive disorder. However, a significant association between 5-HTTVNTR and major depressive disorder existed in a population of Chinese Han. The presence of Stin2.10 and 10/10 genotypes increased the risk for major depressive disorder in a dose-dependent manner.

5-HTT基因多态性与酒精使用障碍的关联性研究

目的探讨5一羟色胺转运体（5-HTT）基因的两个功能多态性位点（5-HTYLPR和STin2VNTR）与酒精使用障碍的关联性。方法对281例酒精障碍患者（AUDIT评分≥10）和277例健康对照（AUDIT评分≤5）的上述两个位点进行基因多态性检测，并对基因分型结果进行病例一对照关联性分析。结果该人群正常对照中5-HTTLPR的L等位基因频率为39．01％、STin2VNTR的10等位基因频率为8．42％，均符合亚洲人群的总体规律；单个位点关联性分析显示5-HTFLPR基因型和等位基因频率在病例组和对照组之间的差异均无统计学意义；STin2VNTR基因型和等位基因频率在两组问的差异经Bonferroni校正后均有统计学意义（P〈0．05），12等位基因为风险等位基因；单倍型分析显示两个位点构成的单倍型频率在病例组和对照组之间的差异无统计学意义。结论5-ITITLPR与该人群酒精使用障碍没有相关性，STin2VNTR的12等位基因可能是酒精使用障碍发生的风险因素。

基因多态性技术在肠易激综合征个体化针刺治疗中的可行性分析

随着基因多态性技术在疾病个体化治疗中的应用,5-羟色胺(5-HT)转运体基因多态性标志物的筛选是目前肠易激综合征的研究热点,通过分析目前肠易激综合征的针刺和中药结合诊疗规范化方案以及5-HT转运体基因多态性及针刺在该方向的研究成果,在目前形成的肠易激综合征针药结合规范化诊疗方案基础上,评估和筛选5-HT转运体基因多态性标志物在肠易激综合征针刺个体化治疗中的重要性和指导意义,为进一步个体化治疗指导方案的建立提供依据。