红细胞补体受体1(CR1)数量基因多态性与反复呼吸道感染易感性的研究

目的通过研究红细胞补体受体1(CR1)数量基因多态性与反复呼吸道感染的相关性,探讨反复呼吸道感染(RRTI)患儿的遗传易感因素.方法利用限制性内切酶HindⅢ,聚合酶链反应限制性片段长度多态性(PCR-RFLP)分析,基因测序等技术测定58例RRTI患儿(病例组)和56例正常儿童(对照组)的红细胞CR1数量基因多态性,并进行比较.结果病例组中CR1基因HH、HL和LL基因型分布频率分别为34.2%、55.3%和10.5%,而对照组中HH、HL和LL基因型分布频率分别为75%、21.4%和3.6%.两组CR1基因型的分布频率差异有显著性(P＜0.001).病例组中HL和LL基因型占优势(OR=5.77).两组CR1基因等位基因的分布频率差异也有显著性(P＜0.01),病例组中L等位基因分布频率高于对照组.结论红细胞补体受体1(CR1)数量基因多态性与反复呼吸道感染有相关性,提示CR1基因HindⅢ酶切位点多态性可能在决定个体反复呼吸道感染遗传易感性方面有重要作用.     

单核苷酸多态性与疾病易感性

连锁分析方法的发现给基因研究带来巨大进展 .任何易感基因的探测都应被已知基因组学图谱的基因标记 .研究人员必须建立一张包含有数百对作为标记物基因的基因图谱 .在随后发现的更精确的标记物包括Alps(限制断片长度多态性 ) ,Vntrs(变数串联重复体 )和最近发现的Snps(单核苷酸多态性 ) .将来 ,更多数量更有价值的基因标记物在不断发现 .同时 ,遗传流行病学已发展新的更有效的统计学方法和生物信息处理工具来分析基因数据 ,这些先进的研究方法的高效率在以往是不能想像的 .这能让我们从有限的研究对象中得到更多的有用数据 .将来 ,可望基…     

单核苷酸多态性与疾病易感性

连锁分析方法的发现给基因研究带来巨大进展. 任何易感基因的探测都应被已知基因组学图谱的基因标记. 研究人员必须建立一张包含有数百对作为标记物基因的基因图谱. 在随后发现的更精确的标记物包括Alps(限制断片长度多态性),Vntrs(变数串联重复体)和最近发现的Snps(单核苷酸多态性). 将来,更多数量更有价值的基因标记物在不断发现.     

健康人补体受体1基因单核苷酸多态性位点与其红细胞表面分子水平的相关性

目的 探讨健康人补体受体1(complement receptor type 1,CR1)基因单核苷酸多态性(single nucleotide polymorphisms,SNP)位点与红细胞表面CR1分子水平的相关性.方法 采用多重PCR-荧光标记单碱基延伸-标签微阵列杂交基因分型技术,检测215例受试者CR1基因5个标签SNP,并采用流式细胞术测定其中81例样本红细胞CR1分子水平.采用Arlequin3.11软件对各SNP位点基因型频率进行哈温平衡(Hardy-Weinberg equilibrium,HWE)检验,采用SPSS 13.0软件对健康人CR1基因SNP位点基因型及等位基因分布的性别差异、不同基因型人群红细胞CR1分子水平差异和影响红细胞CR1分子水平的单因素和多因素进行统计学分析.结果 健康人CR1基因SNP位点基因型及等位基因分布性别间的差异无统计学意义(P＞0.05);健康人红细胞CR1几何平均荧光强度比值(the geometric mean fluorescence intensity ratio of CR1,CR1-GMFIR)为3.36±1.26.rs11118167T＞C和rs9429945C＞T位点各基因型组对应的红细胞CR1分子水平总体比较,差异具有统计学意义(分别为P＜0.01和P＜0.05),两两比较时,rs11118167T＞C位点TC、CC基因型携带者低于TT基因型者,rs9429945C＞T位点CT、TT基因型携带者低于CC基因型者(P值均＜0.01).在年龄、性别、5个标签SNP位点各基因型中,CR1-GMFIR与rs4844600G＞ A(GG/GA/AA)、rs9429945C＞ T(CC/CT/TT)、rs1 1118167T＞C(TT/TC/CC)均呈负相关(分别为P＜0.05,P＜0.01,P＜0.01),影响CR1-GMFIR的最主要因素为rs11118167T＞ C(P ＜0.01),其次为rs9429945C＞ T(P＜0.01).结论 rs11118167T＞C和rs9429945C＞T是红细胞CR1分子水平的主要影响因素.     

单核苷酸多态性与大肠癌遗传易感性

大肠癌遗传易感性与单核苷酸多态性(SNP)的关系是近年来研究的热点。研究发现COX2,MTHFR等代谢相关基因的某些SNP与大肠癌的发病风险相关,其中携带COX2 9850G-10335A单倍型的个体可显著增加患大肠癌的风险。MMP家族是调控大肠癌侵袭转移的重要基因,MMP7-181G等位型频率可显著增加大肠癌淋巴结转移风险。进一步寻找大肠癌特异性SNP,对筛选大肠癌高危人群,预估发病风险,具有重要意义。     

卵磷脂胆固醇酰基转移酶基因单核苷酸多态性与冠心病脂代谢易感性的关联研究

目的：检测卵磷脂胆固醇酰基转移酶（lecithin cholesterol acyltransferase,LCAT）基因3个编码区单核苷酸多态位点在中国人群中的分布频率，并初步探讨它们与脂代谢和冠状动脉粥样硬化性心脏病（coronary atherosclerotic heart disease,CHD）易感性的关系。方法：采用聚合酶链反应－限制性片段长度多态性方法，分析209名正常人和203例CHD患者中608C／T、911T／C和1188C／T（参照序列：NM_000229）3个位点的多态性。结果：608C和608T等位基因频率分布符合Hardy-Weinberg平衡。CHD患者组608T频率显著低于正常人群（P＝0．034）。与无608T CHD患者相比，具有608T的CHD患者的血浆高密度脂蛋白胆固醇显著升高（P＝0．015）。911T／C和1188C/T在两组中均未检出。结论：LCAT基因608T等位基因与CHD患者较高的血浆高密度脂蛋白胆固醇水平相关联，可能与中国人CHD相关。911T／C和1188C／T在中国人群中非常罕见。     

DNMT3B基因启动子单核苷酸多态性与结直肠癌易感性的关联研究

目的通过对天津地区汉族结直肠癌（cRc）患者和正常人群中DNA甲基转移酶3B（DNMT3B）基因单核苷酸多态性（SNP）位点rsl569686基因型的检测,探讨rsl569686位点基因型与CRC易感性的关系。方法应用Sequenom MassArray飞行时间质谱系统检测89例CRC患者（观察组）及94例健康者（对照组）DNMT3B基因多态位点rsl569686的基因分型,判断其与CRC的相关性。结果DNMT3B基因多态位点rsl569686的3种基因型Iq＂、GT、GG在CRC患者中的频率分别为74．2％、24．7％、1．1％,与对照组（73．4％、23．4％、3．2％）相比,差异无统计学意义（P〉O．05）。结论天津汉族人群CRC的遗传易感性可能与DNMT3B基因rsl569686位点的SNP无关。     

白细胞介素12基因多态性与广西壮族人群骨关节结核易感性的关系

BACKGROUND: Interleukin-12 (IL-12) may function as an immune regulator in the pathogenesis of osteoarticular tuberculosis. OBJECTIVE: To explore the association of single-nucleotide polymorphisms in IL-12A rs568408 G/A and IL-12B rs3212227 A/C with susceptibility to osteoarticular tuberculosis and serum interleukin-12 levels in Guangxi Zhuang population. METHODS: The single-nucleotide polymorphisms in IL-12A rs568408 G/A and IL-12B rs3212227 A/C polymorphisms were detected by polymerase chain reaction-single base extension technique and direct DNA sequencing in 150 patients with osteoarticular tuberculosis (disease group) and 165 healthy individuals (control group) in Guangxi Zhuang population. The genotype and allele frequencies of IL-12 and the relationship of genotypes to the susceptibility to osteoarticular tuberculosis were analyzed. In addition, the association of genotypes of single-nucleotide polymorphisms in IL-12A rs568408 G/A and IL-12B rs3212227 A/C with serum IL-12 levels were analyzed. RESULTS AND CONCLUSION: There was no significant difference in the genotype and allele frequencies of IL-12A rs568408 G/A and IL-12B rs3212227 A/C between the disease group and the control group (P > 0.05). Moreover, there was no difference in four haplotypes of IL-12 gene between the disease group and the control group (P > 0.05). Serum IL-12 levels in subjects with osteoarticular tuberculosis carrying the variant rs568408 GA/AA genotypes and wild-type rs568408 GG genotypes were similar (P > 0.05). Similarly, there was no significant difference in serum IL-12 levels between subjects with osteoarticular tuberculosis carrying the variant rs3212227 AC/CC genotypes and wild-type rs3212227 AA genotypes (P > 0.05). These findings suggest that the single-nucleotide polymorphisms in IL-12A rs568408 G/A and IL-12B rs3212227 A/C polymorphisms are not associated with susceptibility to osteoarticular tuberculosis in Guangxi Zhuang population. 中国组织工程研究杂志出版内容重点：组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程     

中国人红细胞补体受体1(CD35)分子量多态性

CR1即补体受体1型,是补体成分C3b、iC3b与C4b的受体,存在于多种细胞表面.每个红细胞表面平均有500个CR1分子,由于红细胞数量较多,所以血液中CR1大部分存在于红细胞表面[1].红细胞CR1参与多种免疫功能如调理免疫复合物[2]等,同时还发现与许多疾病有关,且与其数量或分子量多态性直接相关.目前大部分研究集中在CR1活性及数量多态性上,本研究旨在了解中国人CR1/E分子量多态性.     

染色体12q24.31单核苷酸多态性与冠状动脉粥样硬化性心脏病遗传易感性的关联研究

目的 探讨中国西南地区汉族人群染色体12q24.31 rs2259816基因多态性与冠状动脉粥样硬化性心脏病(简称冠心病)的相关性.方法 收集592例经冠状动脉造影确诊的冠心病患者及同期冠状动脉造影阴性、排除冠心病诊断的463名正常对照,采用聚合酶链反应-限制性片段长度多态性(PCR-restriction fragment length polymorphism,PCR-RFLP)技术分析染色体12q24.31 rs2259816单核苷酸多态性,比较两组间rs2259816位点等位基因和基因型频率分布差异.结果 冠心病组与对照组中均检出AA、AC、CC基因型.rs2259816等位基因A在冠心病组的频率为49.5%,高于对照组的频率43.8%,两组差异有统计学意义(OR=1.129,95%CI:1.029～1.239,P=0.010).结论 中国西南地区汉族人群染色体12q24.31 rs2259816基因多态性与冠心病发生风险密切相关.     

白介素单核苷酸多态性与骨关节炎易感性关系的研究进展

骨性关节炎是骨科常见的致残致畸性疾病,其具体的病因及发病机制目前尚未阐明。年龄、性别、肥胖、既往关节损伤、关节的过度使用及基因因素可能与骨性关节炎发病风险有关。近年来白介素单核苷酸多态性与骨性关节炎发病风险间的研究成为国内外学者关注的热点,希望从基因层面进一步探讨骨性关节炎的发病机制。本文就目前国内外关于白介素单核苷酸多态性与骨性关节炎易感性关系的研究进展作一综述。     

基质金属蛋白酶1基因多态性与肺癌易感性的关联研究

目的研究我国西北汉族人群基质金属蛋白酶（matrix metalloproteinase 1，MMP1）基因-1607（1G→2G）多态与肺癌发生风险的关系。方法应用聚合酶链反应-限制性片段长度多态性分析的方法，检测了150例肺癌患者和200名正常对照者删1G→2G多态的基因型，比较不同基因型与肺癌发生风险的关系。结果肺癌组2G／2G基因型频率要高于对照组（X^2=5．896，P〈0．05），2G／2G基因型者患肺癌的风险是1G／2G和1G／1G基因型的1．77倍（OR=1．77；95％CI：1．12—2．91）。吸烟者中2G／2G基因型发生肺癌的风险是1G／2G和1G／1G基因型的3．20倍（OR=3．20；95％CI：1．50～6．82）。结论我国西北汉族人群MMP1基因-1607（1G→2G）多态性与肺癌易感性有关，2G／2G基因型可以增加肺癌发生风险。     

IL-10、MD-1基因单核苷酸多态性与哮喘易感性的相关性研究

目的:分析IL-10基因 rs1800896、rs3024492位点和髓样分化蛋白1(Myeloid differentiation 1,MD-1)基因rs7740529、rs2233128位点单核苷酸多态性(Single nucleotide polymorphism,SNP)与哮喘遗传易感性的相关性以及过敏性鼻炎(Allergic rhinitis,AR)对哮喘遗传易感性的影响.方法:应用Sequenom MassARRAY○ R SNP分型技术对141例哮喘患者和145例正常对照的四个SNP位点(rs1800896、rs3024492、rs7740529、rs2233128)进行基因分型,再将哮喘患者中确定有过敏性鼻炎和无过敏性鼻炎者分别与正常对照组比较.χ2检验统计分析病例组和对照组的基因型频率;采用非条件Logistic回归校正年龄、性别影响,计算比数比(OR)和95%可信区间(CI),以此评价各位点多态性与哮喘遗传易感性的相关性以及过敏性鼻炎对哮喘易感性的影响.结果:(1)IL-10 rs1800896多态性位点GG、GA、AA三种基因型分布频率在哮喘组、哮喘和过敏性鼻炎共患组、哮喘而无鼻炎组的分布频率和对照组相比,差异均有统计学意义(P＜0.001),有无过敏性鼻炎对其影响不明显.相较GG或AA基因型,携带基因型GA的个体,哮喘的患病风险明显降低(OR=0.033,95%CI:0.017～0.065).(2)MD-1 rs7740529位点CC、CT、TT三种基因型分布频率在哮喘患者组、哮喘和过敏性鼻炎共患组、哮喘而无鼻炎组的分布频率和对照组相比,差异也均有统计学意义(P≤0.005),有无过敏性鼻炎对其影响不明显.相比较CC或TT基因型,携带基因型CT的个体,哮喘的患病风险明显降低(OR=0.369,95%CI:0.225～0.606).(3)IL-10 rs3024492位点TA、AA基因型和MD-1 rs2233128位点AG、GG基因型在哮喘人群中的分布频率与对照组相比无统计学意义(P＞0.05).结论:IL-10 rs1800896与MD-1 rs7740529位点多态性与哮喘的遗传易感性相关,其杂合型的患病风险均明显降低,且有无过敏性鼻炎对其影响不明显.     

HSP90B1基因多态性与系统性红斑狼疮易感性的关联研究

目的：探讨HSP90B1基因多态性与中国汉族人群系统性红斑狼疮(SLE)易感性的关系。方法：从医院收集360例对照和360例SLE患者,按照年龄和性别进行匹配。利用Multiplex SNaPshot分型技术对SNP位点分型。采用基于错误发现率 (FDR) 标准的本杰明-汉伯格 (BH) 法进行多重检验校正。结果：显性模型分析发现rs1165681的基因型频率分布在对照组和SLE组之间存在统计学差异(Crude OR = 0.621, 95%CI = 0.450-0.856, P=0.004; Adjusted OR = 0.619, 95%CI = 0.449-0.855, P=0.004);隐性模型分析发现rs10778306 (Crude OR = 0.568, 95%CI = 0.328-0.984,P = 0.044; Adjusted OR = 0.570, 95%CI = 0.329-0.988, P = 0.045)、rs2722188(Crude OR = 0.227, 95%CI = 0.076-0.681, P = 0.008; Adjusted OR = 0.227, 95%CI=0.076-0.682, P=0.008) 的基因型分布在两组之间存在统计学差异。BH法校正后,rs1165681基因型分布在两组之间有统计学差异 (P_BH = 0.044)。单倍型分析后CCATTAGGCAT(OR=0.323, 95%CI=0.154-0.680, P = 0.002)、CCCTTAGGCAC (OR = 1.324, 95%CI = 1.014-1.729, P =0.039)、TCCCTAGTCGC(OR = 0.465, 95%CI = 0.221-0.979, P = 0.039)和TTCTCGGGCAT(OR=0.443, 95%CI = 0.224-0.875, P = 0.016) 与SLE的发病风险有关;BH法校正后,CCATTAGGCAT在两组之间的分布有统计学差异(P_BH = 0.028),其他单倍型均无统计学差异 (P>0.05)。结论：HP90B1基因多态性可能与中国汉族人群的SLE发病有关。     

DC-SIGNR基因多态性与人类免疫缺陷病毒-1易感性的关联研究

目的 探索DC-SIGNR基因多态性对中国汉族人群人类免疫缺陷病毒-1(human immunodeficiency virus-1,HIV-1)病毒易感性的影响.方法 用聚合酶链反应、琼脂糖凝胶电泳结合测序对345例HIV-1血清阳性感染者及468例H1V-1血清阴性高危人群的DC-SIGNR基因绞链区重复序列分型,然后用卡方检验检测DC-SIGNR基因各亚型在不同人群组中出现的频率.结果 共发现DC-SIGNR基因14个基因型和5种等位基因,其中等位基因7出现的频率最高(67.1%),明显高于美国白人(67.1% vs.46.0%,P<0.01).HIV-1感染组7/7基因型的出现频率明显低于高危人群组(38.55% vs.48.29%,P=0.0057),而HIV-1感染组的9/5基因型的出现频率明显高于高危人群组(4.35% vs.1.07%,P=0.0029).结论 中国人群DC-SIGNR基因多态性分布有着独特的遗传学特征,中国人群中DC-SIGNR基因型9/5可能增加对HIV-1的易感性.     

IL-10基因单核苷酸多态性与疾病易感性的研究进展

白细胞介素10(IL-10)是一种重要的细胞因子,它处于免疫调节的中心环节,具有免疫抑制和免疫刺激的双重调节能力。体内IL-10的水平直接影响着某些疾病的易感性和严重性。现就IL-10的生物学功能做了简要的介绍,并对近些年来IL-10单核苷酸多态性(SNP)及IL-10 SNP与疾病易感性和严重性的研究进展进行了简单的回顾。     

C3基因单核苷酸多态性与成人哮喘易感性的相关性研究

Objective To investigate the association between single nucleotide polymorphisms (SNPs) of the complement component 3 gene (C3) and adult asthma of Hans in southern China. Methods A casecontrol study was performed. Four hundred and eighty-four adult asthma patients diagnosed in Nanfang Hospital and Affiliated Hospital of Guangdong Medical College, and 553 healthy subjects were collected from 2006 to 2010 for the study. MassARRAY-IPLEX and matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF-MS) techniques was used to determine the genotypes of the rs10402876 and rs366510 loci of C3 gene. Results Genotypes GG, GT and TT in the rs366510 locus, and genotypes GG, GT and TT in the rs10402876 locus were detected. A total of 98. 94 percent of samples were genotyped. There were no significant differences in genotype frequencies (χ2 =0. 346, P=0. 841 ) and allele frequencies (χ2 =0. 101,P=0. 751) of rs10402876 between the two groups. However, genotype and allele frequencies of the rs366510 locus were significantly different (χ2 = 9.759, P=0. 008, Bonferroni correction,P= 0. 016; χ2 = 5. 294, P= 0. 021, Bonferroni correction, P = 0. 042, respectively). Compared with genotypes GG+GT, genotype TT of rs366510 significantly increased the risk of asthma, with the odds ratio of 1. 471 (95 % confidence interval 1. 125-1. 923). Conclusion These results suggest that C3 gene could be associated with adult asthma of Han population in southern China.     

C3基因单核苷酸多态性与成人哮喘易感性的相关性研究

Objective To investigate the association between single nucleotide polymorphisms (SNPs) of the complement component 3 gene (C3) and adult asthma of Hans in southern China. Methods A casecontrol study was performed. Four hundred and eighty-four adult asthma patients diagnosed in Nanfang Hospital and Affiliated Hospital of Guangdong Medical College, and 553 healthy subjects were collected from 2006 to 2010 for the study. MassARRAY-IPLEX and matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF-MS) techniques was used to determine the genotypes of the rs10402876 and rs366510 loci of C3 gene. Results Genotypes GG, GT and TT in the rs366510 locus, and genotypes GG, GT and TT in the rs10402876 locus were detected. A total of 98. 94 percent of samples were genotyped. There were no significant differences in genotype frequencies (χ2 =0. 346, P=0. 841 ) and allele frequencies (χ2 =0. 101,P=0. 751) of rs10402876 between the two groups. However, genotype and allele frequencies of the rs366510 locus were significantly different (χ2 = 9.759, P=0. 008, Bonferroni correction,P= 0. 016; χ2 = 5. 294, P= 0. 021, Bonferroni correction, P = 0. 042, respectively). Compared with genotypes GG+GT, genotype TT of rs366510 significantly increased the risk of asthma, with the odds ratio of 1. 471 (95 % confidence interval 1. 125-1. 923). Conclusion These results suggest that C3 gene could be associated with adult asthma of Han population in southern China.     

C3基因单核苷酸多态性与成人哮喘易感性的相关性研究

目的 探讨C23基因的单核苷酸多态性与华南汉族成人支气管哮喘发病的相关性.方法 应用病例对照研究,收集2006年2月至2010年2年南方医院和广东医学院附属医院确诊的汉族成人哮喘患者484例为研究对象,同期健康查体者553名为对照,应用MassARRAY-IPLEX技术和基质辅助激光解吸电离飞行时间质谱平台(matrix-assisted laser desorption/ionization time of flight mass spectrometry,MALDI-TOF-MS)对C3基因的rs10402876和rs366510位点进行基因分型.结果 在华南汉族人群中rs10402876检测到GG、GC和CC 3种基因型,rs366510检测到GG、GT和TT 3种基因型,分型成功率为98.94%.与对照组相比,哮喘组rs10402876的基因型分布(χ2=0.346,P=0.841)和等位基因分布(χ2=0.101,P=0.751)差异均无统计学意义;而rs366510的基因型分布(χ2=9.759,P=0.008;Bonferroni校正法,P=0.016)和等位基因分布(χ2=5.294,P=0.021;Bonferroni校正法,P=0.042)差异均有统计学意义.与GG+GT基因型相比,rs366510的TT基因型显著增加哮喘发生的危险性(OR=1.471,95%CI:1.125～1.923).结论 C3基因rs366510位点单苷酸多态性可能与华南汉族成人哮喘易感性有关.

Abstract：

Objective To investigate the association between single nucleotide polymorphisms (SNPs) of the complement component 3 gene (C3) and adult asthma of Hans in southern China. Methods A casecontrol study was performed. Four hundred and eighty-four adult asthma patients diagnosed in Nanfang Hospital and Affiliated Hospital of Guangdong Medical College, and 553 healthy subjects were collected from 2006 to 2010 for the study. MassARRAY-IPLEX and matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF-MS) techniques was used to determine the genotypes of the rs10402876 and rs366510 loci of C3 gene. Results Genotypes GG, GT and TT in the rs366510 locus, and genotypes GG, GT and TT in the rs10402876 locus were detected. A total of 98. 94 percent of samples were genotyped. There were no significant differences in genotype frequencies (χ2 =0. 346, P=0. 841 ) and allele frequencies (χ2 =0. 101,P=0. 751) of rs10402876 between the two groups. However, genotype and allele frequencies of the rs366510 locus were significantly different (χ2 = 9.759, P=0. 008, Bonferroni correction,P= 0. 016; χ2 = 5. 294, P= 0. 021, Bonferroni correction, P = 0. 042, respectively). Compared with genotypes GG+GT, genotype TT of rs366510 significantly increased the risk of asthma, with the odds ratio of 1. 471 (95 % confidence interval 1. 125-1. 923). Conclusion These results suggest that C3 gene could be associated with adult asthma of Han population in southern China.