miR146a基因多态性与早发型阿尔茨海默病的关联性研究

目的 探讨miR146a的基因多态性与早发型阿尔茨海默病（EOAD）的关系.方法 本研究共纳入103例EOAD患者和100名健康对照组人群,采用SnapShot分型技术检测miR146a基因的rs2910164和rs57095329的多态性.结果 病例组的rs57095329位点的基因型和等位基因频率与健康对照组比较,差异有统计学意义（基因型P=0.027 0,等位基因频率P=0.004 2）,而rs2910164的病例组和对照组基因型和基因频率差异无统计学意义（基因型P=0.595 7,等位基因频率P=0.322 6）.结论 miR146a基因的rs57095329多态位点与EOAD的发病风险具有相关性,rs57095329的G等位基因是EOAD的发病风险的保护因素.     

CAMSAP1L1基因多态性与我国中部地区人群癫痫的相关性分析

目的 探讨我国中部地区汉族人群中CAMSAP1L1基因两个SNP位点rs6660197和rs2292096的多态性与癫痫遗传易感性的关系.方法 采取病例对照研究方法,分别选取157例癫痫患者,其中包括122例良性癫痫伴中央颞区棘波（BECT）和35例难治性癫痫（RE）患儿;选取160例正常体检儿童作为研究对象.利用PCR-RFLP的方法测定两个SNP位点多态性分布,并进行统计分析.结果 在所有患者中SNP位点（rs6660197）的基因型（CC,CT,TT）频率和等位基因C频率与对照组比较差异均有统计学意义（P＜0.05）;SNP位点（rs2292096）的基因型（AA,AG,GG）频率两组比较差异无统计意义（P＞0.05）.SNP位点（rs6660197）与我国中部地区汉族人群BECT的易感性相关（P=0.040）,CC为风险基因型,C等位基因为风险因子,与对照组比较OR =1.584,95％ CI：1.046～2.398,P=0.029.RE患者SNP位点（rs2292096）的基因型与对照组比较差异有统计学意义（P=0.028）,A等位基因为风险因子（OR=2.431,95％CI：1.265～4.134,P=0.010）,等位基因频率明显高于对照组（P=0.010）.结论 CAMSAP1L1基因SNP位点（rs6660197）与BECT的易感性相关,而SNP位点（rs2292096）与RE的易感性相关.     

多巴胺D2受体基因rs1800497多态性与精神分裂症的关联分析

目的 探讨中国汉族人群多巴胺D2受体（DRD2）基因rs1800497多态性与精神分裂症发病的关系及其与性别的关联性.方法 采用TaqMan法检测200例精神分裂症患者（患者组）和219名健康对照（对照组）DRD2基因rs1800497单核苷酸多态性（SNP）,并对等位基因、基因型频率进行比较.结果 患者组与对照组rs1800497等位基因分布和基因型分布差异均无统计学意义（P＞0.05）.患者组或对照组不同性别rs1800497等位基因分布和基因型分布差异均无统计学意义（P＞0.05）.男性患者组与对照组相比或女性患者组与对照组相比,rs1800497等位基因分布和基因型分布差异均无统计学意义（P＞0.05）.结论 中国汉族人群DRD2 rs1800497位点可能不是精神分裂症的易感位点.     

CDH17和LRP1B基因多态性与一氧化碳中毒后迟发性脑病的相关性

目的探讨CDH17(Cadherin-17,钙粘蛋白17)和LRP1B(低密度脂蛋白受体相关蛋白1B,low-density lipoprotein receptor-related protein 1B)基因多态性与一氧化碳(CO)中毒后迟发性脑病(delayed encephalopathy,DEACMP)的相关性。方法选取2008-06—2016-06收入我院神经内科的CO中毒患者,分为DEACMP组和急性一氧化碳中毒(acute carbon monoxide poisoning,ACMP)组,分别检测2组CDH17基因位点(rs2513796)、LRP1B基因位点(rs1541976,rs10183908)SNP分型。结果 2组LRP1B基因位点(rs1541976)分布及等位基因频率比较有显著性差异(P0.05)。2组女性间位点基因型分布及等位基因频率比较无明显差异(P0.05),而男性患者间位点基因型分布及等位基因频率比较差异有统计学意义(P0.05)。DEACMP组男、女患者间基因型分布比较有显著性差异(P0.05),而等位基因频率比较无明显差异(P0.05)。ACMP组男、女患者间基因型分布及等位基因频率比较无明显差异(P0.05)。2组男或女之间LRP1B基因位点(rs10183908)的基因型分布及等位基因频率均比较无明显差异(P0.05)。2组间CDH17基因位点(rs2513796)的基因型分布及等位基因频率比较无明显差异(P0.05)。结论 LRP1B基因位点(rs1541976)的基因多态性与DEACMP具有相关性,其中男性ACMP患者发生DEACMP的危险性增加,A/C基因型增加患病风险,C等位基因型男性ACMP患者易发生DEACMP。LRP1B基因位点(rs10183908)基因多态性与DEACMP无相关性。LRP1B基因多态性可能在DEACMP发病中具有性别发病的遗传易感性。     

DISC1基因多态性与中国上海汉族人群阿尔茨海默病的关联研究

目的：探讨精神分裂症断裂基因(DISC1)rs821633,rs1000731单核苷酸多态性(SNP)与阿尔茨海默病(AD)的关系.方法提取中国上海汉族441例 AD 患者和749名健康对照组的 DNA,采用 Taqman 探针 SNP 基因分型技术测定 DISC1基因 SNP rs821633和 rs1000731位点的等位基因及基因型,检测两组受试者等位基因及基因型的频率分布差异.结果两组受试者中 rs821633不符合Hardy－Weinberg 平衡定律给予舍弃,rs1000731符合 Hardy－ Weinberg 平衡定律纳入,rs1000731位点的等位基因及基因型在两组受试者中分布比较,差异无统计学意义(P ＞0．05).结论 DISC1基因SNP rs1000731与 AD 无明显关联.     

他克莫司结合蛋白5基因多态性与抑郁症的关联研究

目的 探讨他克莫司(FK506)结合蛋白5(FKBP5)基因多态性与抑郁症之间的关系.方法 采用高温连接酶检测反应法,检测254例抑郁症患者(患者组)和231名正常对照者(对照组)的FKBP5基因rs3800373,rs1360780 2个位点基因型,分析基因型和等位基因频率在2组间的分布差异,及其与患者临床症状表型之间的关系.结果 (1)患者组FKBP5基因rs3800373位点GG、GT、TT基因型频率分别为4.7％、41.9％、53.4％,对照组分别为6.6％、38.2％、55.3％,2组比较差异无统计学意义(x2=1.252,P＞0.05);患者组FKBP5基因rs1360780位点CC、CT、TT基因型频率分别为55.4％、39.9％、4.7％,对照组分别为56.8％、37.0％、6.2％,2组比较差异无统计学意义(x2=0.739,P＞0.05);FKBP5基因rs3800373和rs1360780 2个位点等位基因频率在2组之间分布的差异无统计学意义(P均＞0.05);(2)单倍型分析显示,rs3800373-rs1360780 2个位点单倍型在患者组和对照组之间分布的差异无统计学意义(P均＞0.05);(3)rs3800373和rs1360780 2个位点不同基因型患者之间汉密尔顿抑郁量表、汉密尔顿焦虑量表和简明精神病评定量表各因子分值的差异均无统计学意义(P均＞0.05).结论 FKBP5基因rs3800373,rs1360780多态性可能与抑郁症缺乏关联.     

NADPH氧化酶p22~(phox)亚基基因多态性与急性动脉硬化性脑梗死的关联性研究

目的探讨CYBA基因的多态性位点与急性动脉硬化性脑梗死的相关性。方法收集284例脑梗死患者(脑梗死组)及335例同期健康体检者(对照组),采用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)方法检测CYBA基因rs4673和rs3180279位点的基因型。结果 rs4673位点的基因型及等位基因频率分布在脑梗死组和对照组中差异无统计学意义(P0.05)。脑卒中组男性患者rs3180279位点GC、GG基因型的频率低于对照组,CC基因型的频率高于对照组(P=0.034)。结论 CYBA基因的rs4673位点与中国北方汉族人群的急性动脉硬化性脑梗死无相关性,男性rs3180279位点GG+GC基因型的携带者较CC基因型携带者动脉硬化性脑梗死的发病率可能更低。     

缝隙连接蛋白40基因多态性与动脉粥样硬化性脑梗死的关系

目的探讨缝隙连接蛋白40(Cx40)基因多态性与动脉粥样硬化性脑梗死(ACI)易感性的相关性。方法采用SNa Pshot技术对342例ACI患者(病例组)和296例健康者(对照组)的Cx40基因启动子区多态性位点rs35594137进行基因型检测,采用荧光定量PCR方法检测外周血单个核细胞Cx40 mRNA相对表达水平,并分析其与rs35594137位点多态性的相关性。结果病例组rs35594137位点的基因型和等位基因频率分布与对照组比较,差异均有统计学意义(基因型:P=0.003;等位基因A vs G:P=0.001,OR=1.479);病例组Cx40 mRNA相对表达水平低于对照组(P<0.05);对照组AG+AA基因型(A等位基因携带者)的Cx40 mRNA相对表达水平低于GG基因型(P<0.05)。结论 Cx40基因启动子区多态性位点rs35594137与ACI易感性相关,A等位基因是ACI发病的危险因素。     

血栓素A2受体基因多态性与脑梗死的相关性研究

目的 探讨上海地区汉族人群血栓素A2 受体(TXA2R)基因多态性与脑梗死的关系.方法 采用聚合酶链反应-限制性片段长度多态性方法对138例脑梗死患者和135例正常老年对照者TXA2R 基因rs768963位点多态性进行分析,计算其基因型频率和等位基因频率.结果 Logistic回归分析结果显示,血压和血糖水平是脑梗死的独立危险因素.脑梗死组与正常老年对照组受试者TXA2R 基因rs768963位点的基因型(TT 基因型、TC 基因型和CC 基因型)和等位基因(T 和C)频率比较,差异均无统计学意义(P >0.05);进一步Logistic回归分析结果显示,TXA2R 基因rs768963位点基因突变与性别、年龄、血脂、血压和血糖水平均无相关性(P > 0.05).结论 TXA2R 基因rs768963位点多态性可能与上海地区汉族人群脑梗死无关.     

ABCB1基因多态性与中国汉族人群动脉粥样硬化性血栓性脑梗死的相关性研究

目的探讨ATP结合盒B亚家族成员1转运蛋白(ABCB1)基因多态性与中国汉族人群动脉粥样硬化性血栓性脑梗死(ATCI)患者的关系。方法选取392例ATCI患者(脑梗死组)和429例健康对照者(对照组),通过SNa Pshot方法对ABCB1基因的rs1128503和rs1045642位点进行SNP检测。比较两组的基因型和等位基因分布频率,分析基因型与临床表型的关系。结果脑梗死组rs1128503和rs1045642位点的基因型及等位基因分布频率与对照组比较,无统计学意义(P0.05)。女性ATCI患者的rs1128503位点TT基因型和CC基因型体重指数高于TC基因型(P=0.007,P=0.011)。女性ATCI患者的rs1045642位点CC基因型低密度脂蛋白-胆固醇水平高于CT基因型(P=0.030)。结论 ABCB1基因多态性与中国汉族人群ATCI的发病无明显相关性。rs1128503位点多态性可能与女性ATCI患者的体重指数有关,rs1045642位点多态性可能与女性ATCI患者的低密度脂蛋白-胆固醇水平有关。     

黑皮质素受体基因多态性与婴儿痉挛症及促肾上腺皮质激素反应性的相关性研究

目的探讨黑皮质素受体（MC2R～MC4R）基因变异及单核苷酸多态性与婴儿痉挛症发病及促肾上腺皮质激素治疗反应性的关系,并对研究中发现的最具意义的单核苷酸多态性进行深人的功能学研究。方法采用DNA直接测序法检测MC2R～MC4R基因编码区及启动子区基因突变及多态性;SHEsis和HaplOView3．32程序构建单体型,分析不同多态性基因型、等位基因及所构建单体型在婴儿痉挛症患儿和正常对照受试儿童中的分布频率,并观察其与促肾上腺皮质激素治疗反应的相关性。结果测序显示,MC2R基因启动子区共存在4个单核苷酸多态性位点,其中-2T〉C为新发现位点,3个单核苷酸多态性位点（rsl893220、rs2186944和．2T〉C）组间分布频率差异具有统计学意义（P=0．04,0．02,0．01）。常见单体型TCCT对婴儿痉挛症的发生具有保护作用（P=O．00）,且TCCT携带者比非携带者对促肾上腺皮质激素治疗更为敏感（P=0．00）。体外功能学研究证实,MC2R基因TCCT型启动子转录效率是TCCC的4倍（P=0．00）,经促肾上腺皮质激素刺激后含TCCT单体型启动子MC2RmRNA表达水平上调5倍（P：0．00）,而含TCCC单体型启动子仅上调1．50倍（P〉0．05）。MC4R基因启动子区单核苷酸多态性位点rsll872992与婴儿痉挛症的发生有关,婴儿痉挛症组患儿TC型频率低于正常对照组（P=0．00）：r型等位基因携带者对促肾上腺皮质激素治疗效果优于非丁型等位基因携带者（P=0．01）。但MC3R单核苷酸多态性组间分布频率差异无统计学意义（P〉0．05）。结论黑皮质素受体单核苷酸多态性与婴儿痉挛症的发生有一定关系,并可影响促肾上腺皮质激素治疗的反应性。这一发现有助于理解婴儿痉挛症的发病机制,并为临床早期预测促肾上腺皮质激素治疗反应提供一定线索。     

Analysis of single nucleotide polymorphisms in the melanocortin-4 receptor promoter in infantile spasms

OBJECTIVES: Infantile spasms is a severe epileptic encephalopathy of infancy. ACTH that ameliorates infantile spasms might act through activating the central melanocortin-4 receptor (MC4R) to suppress excessive production of corticotrophin-releasing hormone (CRH). This study aimed to elucidate an association between the genetic variants of the MC4R gene and infantile spasms. METHODS: The study population comprised 96 patients with infantile spasms and 118 controls. All subjects were screened for variations in the promoter and coding region of the MC4R gene using a direct sequencing method. ATCH responses in patients carrying different genotypes were also assessed. RESULTS: The distributions of genotypes and alleles of rs11872992 in the MC4R promoter were significantly different between cases and controls. The frequencies of heterozygous carriers (TC genotype) were significantly lower in cases (10%) than in controls (27%) (p=0.003). The distributions of rs11872992 TC and CC genotypes were significantly different between ACTH responders and non-responders (OR, 0.14; 95% C.I, 0.03-0.69; p=0.007). The T-allele carriers (83.3%) had a higher responsiveness to ACTH than non-carriers (41.7%). CONCLUSIONS: The present study shows that genetic variants in the MC4R promoter are associated with the development of infantile spasms. The rs11872992 polymorphism influences ACTH treatment responses in patients with infantile spasms.     

A genetic variant in the microRNA-146a gene is associated with susceptibility to alcohol use disorders

BackgroundPolymorphisms in the microRNA (miRNA) regulatory pathways are novel functional genetic variants whose association with alcoholism susceptibility has not been previously studied. Given the potential relationship between certain miRNAs and alcohol use disorders (AUDs), this study was designed to explore the association between two polymorphisms within hsa-miR-146a and hsa-miR-196a2 genes and susceptibility to these diseases.MethodsThree hundred and one male patients with AUDs and 156 sex-matched healthy volunteers were enrolled. Polymorphisms were genotyped using TaqMan^® PCR assays. Allele and genotype frequencies were compared between groups and logistic regression analysis was also performed to analyze the model of inheritance.ResultsThere was a significantly higher prevalence of allele C carriers (47.8%) of the miR-146a G>C polymorphism (rs2910164) among patients with AUDs when compared with controls (35.9%), and multivariable logistic regression analysis showed that the C allele was associated with these AUDs (OR = 1.615, 95% CI 1.067–2.442; P = 0.023). Neither the genotype nor the allele distribution of miR-196a2 polymorphism (rs11614913) was significantly different between groups.ConclusionsThis is the first genetic association study to explore the relationship of miRNA polymorphisms with AUDs and to show an association of the miR-146a C>G rs2910164 allelic variant with this disease.     

囊泡相关膜蛋白8基因多态性与动脉粥样硬化性脑梗死相关性研究

目的探讨囊泡相关膜蛋白8(VAMP8)基因rs13426038和rs10666612多态性与动脉粥样硬化性脑梗死(ACI)的相关性。方法采用聚合酶链反应-限制性片段长度多态性技术,对动脉粥样硬化性脑梗死组和正常对照组VAMP8基因rs13426038和rs10666612位点进行基因分型。结果两位点基因型分布均符合Hardy-Weinberg遗传平衡检验。VAMP8基因rs13426038位点CC/GG基因型频率在ACI组和对照组分别为20.5%/35.9%和15.0%/36.0%,C/G等位基因频率为42.3%/57.7%和39.5%/60.5%;两组间基因型及等位基因频率差异比较无统计学意义(P=0.08,P=0.25)。VAMP8基因rs10166612位点AA/GG基因型频率在ACI组和对照组分别为92.7%/0.5%和91.8%/0%,A/G等位基因频率为96.1%/3.9%和95.9%/4.1%;两组间基因型及等位基因频率分布比较亦无统计学差异(P=0.16,P=0.46)。结论 VAMP8基因rs13426038 C/G和rs10166612 A/G多态性可能与ACI发生无关。     

Common genetic variation within <Emphasis Type="Italic">miR-146a</Emphasis> predicts disease onset and relapse in multiple sclerosis

Despite extensive studies focusing on the changes in expression of microRNAs (miRNAs) in multiple sclerosis (MS) compared to healthy controls, few studies have evaluated the association of genetic variants of miRNAs with MS clinical course. We investigated whether a functional polymorphism in the MS associated miR-146a gene predicted clinical course (hazard of conversion to MS and of relapse, and annualized change in disability), using a longitudinal cohort study of persons with a first demyelinating event followed up to their 5-year review. We found the genotype (GC+CC) of rs2910164 predicted relapse compared with the GG genotype (HR=2.09 (95% CI 1.42, 3.06), p=0.0001), as well as a near-significant (p=0.07) association with MS conversion risk. Moreover, we found a significant additive interaction between rs2910164 and baseline anti-EBNA-1 IgG titers predicting risk of conversion to MS (relative excess risk due to interaction [RERI] 2.39, p=0.00002) and of relapse (RERI 1.20, p=0.006). Supporting these results, similar results were seen for the other EBV-correlated variables: anti-EBNA-2 IgG titers and past history of infectious mononucleosis. There was no association of rs2910164 genotype for disability progression. Our findings provide evidence for miR-146a and EBV infection in modulating MS clinical course.     

Genetic Polymorphisms in Pre-microRNAs and Risk of Ischemic Stroke in a Chinese Population

Ischemic stroke is considered to be a complex disease consisting of a group of heterogeneous disorders with multiple genetic and environmental risk factors. MicroRNAs participated in various physiopathological processes; common single-nucleotide polymorphisms (SNPs) in pre-miRNAs have been shown to be associated with susceptibility to several human diseases. We evaluated the associations of the hsa-mir-196-a2/rs11614913 T/C, hsa-mir-146a/rs2910164 C/G, and hsa-mir-499/rs3746444 A/G polymorphisms in pre-miRNAs with the risk of ischemic stroke in a Chinese population. The three polymorphisms were identified in 296 ischemic stroke patients and 391 healthy controls using polymerase chain reaction–restriction fragment length polymorphism. The frequency of the allele G of hsa-mir-499/rs3746444 A/G showed significant association with ischemic stroke when compared with controls (OR?=?1.509, 95%CI?=?1.151–1.978, P?=?0.003). Increased ischemic stroke risks were associated with rs3746444 A/G genotypes in different genetic model (homozygote comparison: P?=?0.045, OR?=?2.084, 95%CI?=?1.019–4.262; heterozygote comparison: P?=?0.024, OR?=?1.489, 95%CI?=?1.063–2.087; dominant genetic model: P?=?0.007, OR?=?1.563, 95%CI?=?1.135–2.153). Similar results were obtained by adjusted fully risk factors. However, we failed to find any association between the alleles and genotypes of rs2910164 C/G and rs11614913 T/C SNPs and ischemic stroke, respectively (p?>?0.05). The present study provided evidence that hsa-mir-499/rs3746444 A/G polymorphism might be associated with a significantly increased risk of ischemic stroke in a Chinese population, indicating that the common genetic polymorphism in pre-microRNAs contributed to the pathogenesis of ischemic stroke.     

α-内收蛋白基因rs4963多态性与脑出血的关系

目的研究α-内收蛋白基因rs4963多态性与脑出血的关系。方法对甘肃地区238例脑出血患者和240例健康对照者应用血液基因组DNA提取试剂盒方法检测α-内收蛋白基因rs4963多态性,分析比较脑出血病例组和对照组rs4963多态性的分布差异。结果病例组和对照组α-内收蛋白基因rs4963基因型分布、等位基因频率差异均无统计学意义(P0.05)。按性别分层后,病例组与对照组基因型分布和等位基因频率差异仍无统计学意义(P0.05)。结论甘肃地区α-内收蛋白基因rs4963多态性与脑出血无关联。     

肿瘤坏死因子超家族成员4基因SNP rs3861950与脑梗死

目的 探讨肿瘤坏死因子超家族成员4(TNFSF4)基因SNP rs3861950与本地区脑梗死发病的关系.方法 采用TaqMan-PCR方法检测TNFSF4基因SNP rs3861950基因型与等位基因频率.湖南籍汉族脑梗死共287例,对照组为湖南籍汉族健康体检者共285名.结果 脑梗死组CC基因型(7.7%)分布与对照组(2.1%)相比,差异具有统计学意义(X2=9.553,P=0.008);C等位基因频率脑梗死组(0.190)高于对照组(0.137,X2=5.887,P=0.015).动脉血栓性脑梗死亚组与对照组比较其基因型(X2=9.396,P=0.009)及等位基因频率(X2=6.134,P=0.013)差异均有统计学意义.非条件Logistic多因素回归分析显示CC基因型使脑梗死发病的风险是其他危险因素的3.7倍(P=0.002,OR 3.706).结论 TNFSF4基因rs3861950 C→T与湖南籍汉族脑梗死发病相关,尤其与动脉血栓性脑梗死发病相关,rs3861950 C等位基因可能是湖南籍汉族脑梗死发病的独立危险因素.