MTHFR基因多态性在台州地区原发性男性不育症中的研究

目的探讨亚甲基四氢叶酸还原酶(MTHFR)基因C677T和A1298C位点多态性与原发性男性不育症的关系。方法选取2018年1～7月在台州市中心医院就诊的的原发性男性不育患者104例为研究对象,选取同期健康查体的已育男性108例为对照组。采用荧光定量PCR技术检测104例男性不育症患者和108例健康已育男性的MTHFR C677T和A1298C位点的多态性,统计学分析不同基因型男性与原发性不育的相关性。结果原发性男性不育组和健康对照组MTHFRC677T位点TT基因型频率分别为23.08%、12.96%,T等位基因频率分别为43.75%、33.33%,两组间基因型频率和基因频率均存在显著性差异(χ~2=6.975,χ~2=4.859,P0.05);原发性男性不育组和健康对照组的MTHFR A1298C位点CC基因型频率和C等位基因频率均无显著性差异(χ~2=0.108,χ~2=0.170,P0.05)。结论 MTHFR基因677位点C-T变异与原发性男性不育具有相关性,1298位点多态性与原发性男性不育无显著相关性。     

无精子症患者中MTHFR C677T、A1298C及MTRR A66G基因多态性分析

目的 探讨亚甲基四氢叶酸还原酶(MTHFR) C677T、A1298C及蛋氨酸合成酶还原酶(MTRR) A66G基因多态性在男性无精子症患者中的分布情况。方法 选取于2020年1月至2023年8月就诊于新疆佳音医院不孕不育门诊的97名无精子症患者,所有患者进行睾丸组织活检并基因测序MTHFR C677T、A1298C及MTRR A66G基因的多态性。按照手术中是否找到精子将患者分为有精子组(n=70)和无精子组(n=27),比较两组患者的基本资料以及MTHFR C677T、A1298C及MTRR A66G基因型多态性的频率及等位基因频率分布。结果 两组患者间年龄、体质量指数(BMI)以及是否伴随精索静脉曲张的差异均无统计学意义(P>0.05)。MTHFR C677T包括CC、CT、TT三个基因型及C、T两个等位基因,A1298C包括AA、AC、CC三个基因型及A、C等位基因;MTRR A66G包括AA、AG、GG三个基因型,A、G两个等位基因。有精子组和无精子组患者的MTHFR基因677位点TT基因型频率分别为18.6%、18.5%,T等位基因频率分别为42.1%、40.7%;M...     

亚甲基四氢叶酸还原酶基因多态性与食管癌易感性关系的Meta分析

目的探讨亚甲基四氢叶酸还原酶(MTHFR)基因C677T和A1298C多态性与食管癌易感性间的关系。方法计算机检索PMedline(PubMed)、Embase、web of Science、Cochrane、wanted、CNKI、VIP并辅以手工检索,检索时限为建库至2019年9月发表的相关文章。比值比和相应的95%置信区间(95%CI)用于评估MTHFR C677T(rs1801394)和MTHFR A1298C(rs1801131)两种叶酸代谢基因突变与食管癌风险的关系。结果 MTHFR A1298C(rs1801131)变异基因型与食管癌发病率增加有相关性(CA vs.AA:OR=1.22,P0.05;CA+CC vs.AA:OR=1.18,P0.05)。MTHFR C677T(rs 1801133)变异基因型与食管癌风险增加无关。结论 MTHFR基因1298AC和CC基因型与食管癌发病有关。     

亚甲基四氢叶酸还原酶基因C677T和A1298C位点多态性与胃癌易感性的相关性分析

目的探讨亚甲基四氢叶酸还原酶(MTHFR)基因C677T和A1298C位点多态性与胃癌易感性的相关性。方法回顾性收集2008年1月至2014年1月期间在笔者所在医院住院的、行MTHFR基因C677T和A1298C位点检测的160例胃癌患者作为胃癌组,收集同期160名自愿接受上述基因检测的健康体检人员作为对照组,比较2组2种位点基因型的分布情况。结果胃癌组患者MTHFR基因C677T位点的基因型为:CC 72例,CT 64例,TT 24例;对照组为:CC 78例,CT 69例,TT 13例。胃癌组患者MTHFR基因A1298C位点的基因型为:AA 58例,AC 84例,CC 18例;对照组为:AA 62例,AC 77例,CC 21例。2组C677T位点及A1298C位点的基因型分布比较差异均无统计学意义(P>0.05)。结论 MTHFR基因C677T位点和A1298C位点多态性与胃癌的易感性无明显相关性。     

MTHFR基因多态性与贵阳地区原发性不育症的关系研究

目的 研究亚甲基四氢叶酸还原酶(MTHFR)基因677和1298位点多态性与贵阳地区原发性男性不育症的关系。方法 选取2018年1月至2021年12月期间就诊于贵阳市妇幼保健院的254例原发性男性不育患者为病例组，以配偶自然受孕且生育过正常新生儿的238例健康男性为对照组。采用Taqman探针法检测两组MTHFR基因677和1298位点的基因型，并统计分析其基因型分布特点、等位基因分布频率以及MTHFR基因型与男性不育症的相关性。结果 基因检测结果显示，MTHFR 677位点包括CC、CT、TT三个基因型；1298位点包括AA、AC、CC三个基因型。病例组和对照组MTHFR基因677位点TT基因型频率分别为14.17%、14.71%,T等位基因频率分别为37.60%、36.13%;病例组和对照组1298位点CC基因型频率分别为5.51%、3.78%,C等位基因频率分别为23.43%、22.27%;两组间各位点基因型频率和等位基因频率比较均无统计学差异(P>0.05)。结论 MTHFR基因677和1298位点多态性与贵阳地区原发性男性不育症无明显关系。     

MTHFR基因多态性与蒙古族绝经后妇女骨质疏松的相关性研究

目的探讨本地区蒙古族绝经后妇女亚甲基四氢叶酸还原酶(methylenetetrahydrofolate reductase,MTHFR)基因的多态性位点C677T、A1298C基因多态性与内蒙古地区蒙古族绝经后女性骨质疏松症(osteoporosis,OP)遗传易感性的关系。方法收集150例门诊及住院(确诊为骨质疏松)蒙古族绝经后妇女为观察组,对照组来自门诊按年龄配比的骨含量正常的蒙古族绝经后妇女145例,均以双能X线骨密度仪测定腰椎和髋部骨密度,以T值≤-2.5诊断为骨质疏松,-2.5≤T≤-1.0为骨含量减少,T值-1.0为骨含量正常,并进行MTHFR C677T及A1298C基因多态性检测。结果骨质疏松组MTHFR基因受体C677T基因型CC、CT、TT频率分别为29.3%、44.0%和27.7%,对照组基因型CC、CT、TT频率分别为42.8%、44.8%和12.4%,两组差异有统计学意义(P=0.017)。骨质疏松症组中的T等位基因频率为48.7%,显著高于对照组(34.8%,P=0.005),提示T等位基因是骨质疏松发生的危险因素(OR=1.77,95%CI=1.18~2.64,P=0.001)。与CC基因型相比,TT基因型携带者的骨质疏松发生风险增加至3.15倍(95%CI=1.45~6.86,P=0.004),该作用在年龄≥60岁及体重指数偏高的女性中表现更明显。而MTHFR A1298C的多态性位点对绝经后骨质疏松的发生没有显著影响(P=0.513)。结论 MTHFR C677T基因变异与蒙古族绝经后妇女骨质疏松易感性明显相关,MTHFR A1298C的多态性位点与蒙古族绝经后妇女骨质疏松的发生没有明显相关性。     

乳腺癌亚甲基四氢叶酸还原酶基因多态性的临床意义

目的：探讨乳腺癌亚甲基四氢叶酸还原酶（MTHFR）基因多态性的临床意义。方法：收集54例乳腺癌女性患者血液样本（研究组）和93例正常女性血液样本（对照组）,均进行DNA提取、PCR扩增、DNA限制性片段长度多态性分析。分析MTHFR C677T、A1298C基因型在乳腺癌女性和正常女性中的分布差异。结果：PCR-RFLP法检测显示,MTHFR基因野生型纯合子CC(198 bp)只有1条带,MTHFR杂合子CT(198 bp、175 bp)产生2条带,MTHFR变异型纯合子TT(175 bp)只有1条带。研究组MTHFR 677CC、677CT和677TT基因型频率分别为37.04%、51.58%和11.11%,677C、677T等位基因频率分别为62.96%、21.51%;对照组MTHFR 677CC、CT和TT基因型频率分别为34.41%、48.39%和17.20%,677C、677T等位基因频率分别为37.04%、41.40%。两组MTHFR C677T基因型频率和等位基因频率比较差异均无统计学意义（P均>0.05）。研究组MTHFR 1298AA、AC、CC基因型频率分别为...     

MTHFR基因C677T和A1298C多态与中国部分人群非综合征性唇腭裂的相关研究

目的 探讨MTHFR基因C677T和A1298C多态与非综合征性唇腭裂（NSCL／P）发生的关系。方法 采用病例对照设计，应用聚合酶链式反应-限制性片段长度多态性（PCR—RFLP）方法，进行亚甲基四氢叶酸还原酶（MTHFR）基因C677T和A1298C多态性检测，并进行遗传统计分析。结果 对于MTHFR基因C677T，48个杂合子父母及患儿的核心家庭TDT检验（X^2=0．02，P〉0．05）；76例NSCL／P患儿和60例正常儿童基因型及等位基因频数病例对照研究（X^2=9．91，P〈0．05）。而MTHFR基因A1298C，27个杂合子父母及患儿的核心家庭TDT检验（X^2=4．00，P〈0．05）；76例NSCL／P患儿和60例正常儿童基因型及等位基因频数病例对照研究（X^2=4．42，P〈O．05）。结论 MTHFR基因C677T位点多态与NSCL／P的发生相关，MTHFR基因A1298C位点多态可能是NSCL／P的遗传易感因子。     

亚甲基四氢叶酸还原酶C677T单核苷酸多态性与腹腔静脉血栓易感性关系的Meta分析

目的:探讨亚甲基四氢叶酸还原酶(MTHFR)基因C677T单核苷酸多态性(SNP)与腹腔静脉血栓(SVT)易感性的关联情况。方法:检索多个国内外数据库收集MTHFR C677T SNP与SVT相关的病例-对照研究,用Stata 12.0软件分析其基因型和等位基因与SVT的关联性。结果:共纳入19篇文献,包括1 194例患者和1 988例对照。SVT分为门静脉血栓(PVT)、BuddChiari综合征(BCS)和肠系膜静脉血栓(MVT)3个亚组。MTHFR C677T SNP在显性模型CC vs.(CT+TT)下(OR=0.51,95%CI=0.34~0.76,P=0.001)和相加模型CC vs.TT下(OR=0.33,95%CI=0.23~0.47,P0.001)与SVT的关联性有统计学意义;在隐性模型TT vs.(CT+CC)下,MTHFR C677T SNP与SVT(OR=2.27,95%CI=1.77~2.90,P0.001)及PVT亚组(OR=2.23,95%CI=1.57~3.17,P0.001)的关联性有统计学意义;在等位基因模型T vs.C下,MTHFR C677T SNP与SVT(OR=1.84,95%CI=1.33~2.55,P0.001)及MVT亚组(OR=1.64,95%CI=1.14~2.36,P=0.008)的关联性有统计学意义。结论:MTHFR C677T SNP与SVT易感性之间有关联性,携有TT基因型和T等位基因的人群罹患SVT的风险可能增加。     

葡萄糖调节蛋白78基因3'UTR多态性与男性弱精子症的相关性研究

目的:探究葡萄糖调节蛋白78(GRP78)基因3'UTR单核苷酸多态性(rs12009、rs1140763和rs16927997位点)与弱精子症的关系。方法:选取400例弱精子症不育男性为弱精子症组,400例有生育史的健康男性为对照组,运用多重单碱基延伸PCR(SNa Pshot)对所有研究对象GRP78基因的rs12009、rs1140763和rs16927997位点进行基因分型,再分析此3个位点多态性与男性弱精子症的相关性。结果:弱精子症组和对照组的前向运动精子百分率分别为(20.09±8.18)%、(57.16±13.45)%,两者差异具有统计学意义(P0.01)。GRP78基因rs12009和rs1140763存在CC、CT、TT 3种基因型和C、T 2种等位基因;rs16927997存在GG、GA、AA 3种基因型和G、A 2种等位基因。在弱精子症组中,rs12009位点C、T等位基因频率分别为47.3%、52.7%;rs1140763位点C、T等位基因频率分别为52.0%、48.0%;rs16927997位点G、A等位基因频率分别为4.4%、95.6%。而在对照组中,rs12009位点C、T等位基因频率分别为44.3%、55.7%;rs1140763位点C、T等位基因频率均为50.0%;rs16927997位点G、A等位基因频率分别为6.0%、94.0%。3个位点基因型及等位基因频率在弱精子症组和对照组中的分布差异均无统计学意义(P0.05);进一步单倍型分析,发现在弱精子症组和对照组中主要为C-C-A、T-C-G、T-T-A 3种单倍型,但也未发现单倍型与男性弱精子症存在相关性。结论:GRP78基因3'UTR多态性与男性弱精子症的发病风险不存在相关性。     

桂西地区中老年人脂联素基因多态性与骨质疏松症的相关性

目的 探讨桂西地区中老年人脂联素基因多态性与骨质疏松症的相关性。方法 选取桂西地区中老年人志愿者623名,进行超声骨密度测量、脂联素基因多态性位点分析及SNPs位点的连锁不平衡分析。结果 同年龄（55岁以上）男性骨量值高于女性（P＜0.05）,骨量正常的个体比例随年龄的增长而下降,而骨质疏松症的患病率则随年龄增长而增加。脂联素基因5个SNPs位点均达到Hardy-Weinberg平衡（P＞0.05）,其中SNP位点rs1063539的CG基因型在骨质疏松病例组分布高于正常组,而GG基因型在病例组中的分布则低于正常组。CG型可能是骨密度的一个保护基因型,等位基因C可能与骨质疏松症的发生呈负相关。SNP位点rs3774261的AA基因型在病例组中的分布高于正常组。连锁不平衡检测发现,脂联素基因的5个SNP位点之间不存在连锁关系。结论 脂联素基因的SNP位点rs1063539和rs3774261与桂西地区中老年人群的骨质疏松有密切关系。     

中国北方人群维生素D受体基因多态性与腰椎退变性椎间盘疾病关联研究

背景：退变性椎间盘疾病（degenerative disc disease,DDD）的发生由机体内在基因和外在环境因素综合作用导致,维生素D受体（vitaminDreceptor,VDR）基因可能同腰椎DDD的发生存在相关性。 目的：探讨VDR基因多态性与腰椎DDD发生的关系。 方法：采用病例对照研究方法,以MRI确诊腰椎间盘退变患者118例为病例组,无腰椎间盘退变者112例为对照。应用VeraCode GoldenGate Genotyping Assay SNPs检测系统检测VDR基因的单核苷酸多态性（single nucleotide polymorphism,SNP）信息,分析两组VDR基因多态性的差异。 结果：筛查VDR基因16个位点,rs2239179等位基因在病例组和对照组中的分布频率存在差异（P=0．046）,经Permutation校正后差异无统计学意义（P=0．4299）,其他各位点等位基因在病例组和对照组中的分布频率差异均无统计学意义（P值均〉0．05）。VDR基因各位点基因型在病例组和对照组中的分布频率差异均无统计学意义（P值均〉0．05）。在非条件Logistic回归分析中,未发现VDR基因各位点符合Codominant、Dominant、Recessive、Overdominant或Log-additive遗传模型。在VDR基因的各单倍体型中,病例组和对照组间的频率分布差异均无统计学意义（P值均〉0．05）。 VDR基因多态性与腰椎DDD的发生可能无关。     

Single nucleotide polymorphism C677T in the methylenetetrahydrofolate reductase gene might be a genetic risk factor for infertility for Chinese men with azoospermia or severe oligozoospermia

Aim： To analyze the distribution of the single nucleotide polymorphism （SNP） C677T in the methylenetetrahydrofolate reductase （MTHFR） gene in 355 infertile Chinese patients with idiopathic azoospermia or severe oligozoospermia and 252 fertile Chinese men as controls to explore the possible association of the SNP and male infertility. Methods： Using the polymerase chain reaction （PCR）-restriction fragment length polymorphism technique, the allele and genotype distribution of SNP C677T in the MTHFR gene were investigated in both patients and controls. Results： The frequencies of allele T （40.9% vs 30.4%, P = 0.002, odds ration [OR] = 1.58, 95% confidence interval [CI]： 1.24-2.02） and mutant homozygote （TT） （18.3% vs. 11.5%, P = 0.023, OR = 1.72, 95% CI： 1.07-2.76） as well as carrier with allele （TT ＋ CT） （63.4% vs. 49.2%, P = 0.0005, OR = 1.79, 95% CI： 1.29-2.48） in infertile patients were significantly higher than those in controls. After patient stratification, the significant differences in distribution of the SNP between each patient subgroup and control group still remained. Conclusion： Our findings indicate that there is an association of SNP C677T in the MTHFR gene with male infertility, suggesting that this polymorphism might be a genetic risk factor for male infertility in Chinese men.     

膝骨关节炎与相关金属蛋白酶的基因多态性关联研究

目的探讨带有血小板凝血酶敏感蛋白样模体的解整链蛋白金属蛋白酶5(ADAMTS-5)基因单核苷酸多态性(SNP)与膝骨关节炎的关联性。 方法连续收集洛阳正骨医院188例膝骨关节炎患者作为病例组，对照组收集排除疾病诊断的100人。应用基因组变异服务器(GVS)网站选择ADAMTS-5基因共计15个SNP位点，采用基质辅助激光解析飞行时间质谱分析技术(MALDI-TOF-MS)进行SNP分型，先行哈迪温伯格(HW)平衡检测，对符合HW平衡的SNP位点等位基因进行卡方检验及单体型分析，对基因型进行logistic回归分析。 结果病例组rs2249350位点C等位基因显著多于对照组[比值比(OR)＝1.176，95%置信区间(CI)(1.025，1.351)，P＝0.016]，A等位基因显著少于对照组[OR＝0.761，95%CI(0.612，0.947)，P＝0.016]；rs2249350位点AA基因型[OR＝0.288，95%CI(0.124，0.669)，P＝0.004]及隐性基因模型[OR＝0.348，95%CI(0.162，0.749)，P＝0.007]均与膝关节骨关节炎负相关；rs229054、rs2249350两位点存在连锁不平衡，构成GC、GA、AC共3个单体型区块，其中病例组单体型GC显著多于对照组[OR＝1.259，95%CI(1.032，1.537)，P＝0.019]，而GA则显著少于对照组[OR＝0.763，95%CI(0.614，0.949)，P＝0.017]。 结论ADAMTS-5基因rs2249350位点C等位基因可能是膝关节骨关节炎的致病性因素，A等位基因则可能是保护性因素；rs2249350位点AA基因型可能是膝关节骨关节炎的保护性基因型，降低患病风险，且A等位基因可能为隐性基因，隐性遗传；rs229054、rs2249350位点GC单体型可能是膝关节骨关节炎的致病性因素，而GA单体型则可能是保护性因素。该位点等位基因、基因型及单体型与膝关节骨关节炎的关系仍需进一步深入研究和验证。     

Effect of MTHFR 1298A-->C and MTHFR 677C-->T genotypes on total homocysteine, folate, and vitamin B(12) plasma concentrations in kdiney graft recipients

The effect of 5,10-methylenetetrahydrofolate reductase (MTHFR) 677C-->T and 1298A-->C on total homocysteine (tHcy), folate and vitamin B(12) levels was investigated in 733 kidney graft recipients. The six major genotype combinations were used as grouping variables, and age, gender, BMI, serum creatinine, and creatinine clearance and ln-folate, ln-vitamin B(12), or logarithmus naturalis tHcy (ln-tHcy) were used as covariates in three ANCOVA and multiple stepwise linear regression models. Hyperhomocysteinemia was present in 49.7% of the patients. The allele frequency of MTHFR 677T and 1298C was 0.319 and 0.326. MTHFR genotype and all other variables were significant predictors of ln-tHcy (higher tHcy plasma levels for MTHFR 677TT/1298AA versus all other five genotype groups: P < 0. 05). BMI, creatinine clearance, ln-tHcy, and MTHFR genotype influenced ln-folate (lower folate levels for MTHFR 677TT/1298AA versus all other genotype groups: P < 0.05). Creatinine clearance and ln-tHcy were the only predictors of ln-vitamin B(12) levels. In a prespecified subgroup analysis (n = 496), the MTHFR genotype also influenced tHcy levels and compound heterozygous patients had significantly lower folate levels as compared with MTHFR 677CC/1298AA and 677CC/1298CC. This study shows that the MTHFR 677TT/1298AA and 677CT/1298AC genotypes are significant predictors of tHcy and folate plasma levels.     

No association of factor V Leiden, prothrombin G20210A, and MTHFR C677T gene polymorphisms with kidney allograft survival: a multicenter study

BACKGROUND: It has been proposed that inherited risk factors of venous thromboembolism, such as factor V G1691A (FV-Leiden), prothrombin G20210A, and methylenetetrahydrofolate reductase (MTHFR) C677T, might be associated with poorer survival rates of transplanted kidneys. On the basis of this hypothesis, we performed a multicenter study, involving recipients of primary and repeat kidney transplants, to investigate the potential effect of these three single nucleotide polymorphisms (SNP) on graft survival. METHODS: The study consisted of 676 first and 651 retransplant patients. Using the polymerase chain reaction-sequence specific primers method, we typed all patients for the three SNP and analyzed graft survival. RESULTS: We could not find a statistically significant association between graft survival and factor V Leiden or MTHFR C677T genotypes. A better 3-yr graft survival was found for first transplant recipients with the genotype prothrombin 20210 G/G as compared to those with the G/A genotype (P=0.031). However, Bonferroni correction for the three SNPs investigated in this series rendered the P value insignificant (P(corrected)=0.093). CONCLUSION: We did not find a statistically significant association of SNP factor V Leiden G1691A and MTHFR C677T with renal graft survival. Prothrombin G20210A resulted in a significant association that was not sustained after Bonferroni correction. This SNP might be an interesting candidate for future studies.     

腰椎间盘退变性疾病与COL9A2基因多态性的关系

目的 探讨COL9A2基因多态性与腰椎间盘退变性疾病(DDD)的关系.方法 采用"病例-对照"研究方法:125例中国汉族DDD患者(DDD+)与126例中国汉族非DDD受访者(DDD-),用SNP分型系统-SNPstream UIT(Cenotyping System)对所有样本的所选SNP位点行基因型鉴定.对检测数据分别行拟和优度x2检验、基于等位基因频率/基因型的关联分析.结果 共筛查SNPl(rs12722877)、SNP2(rs3737820)、SNP3(rs209914)和SNP4(rs6676013)4个位点.病例组中和对照组中,两个位点的基因型分布均符合Hardy-Weinberg平衡;病例/对照组中等位基因频率分别为:SNP1C=228(91%)/22(9%)、SNP1G=235(93%)/17(7%),SNP2A=214(86%)/36(14%)、SNP2T=223(89%)/27(11%),SNP3A=237(95%)/13(5%)、SNP3C=238(94%)/14(6%),SNP4C=30(12%)/220(88%)、SNP4T=26(10%)/226(90%),差异无统计学意义(P＞0.05).病例/对照组中基因型频率差异无统计学意义(P＞0.05).结论 COL9A2基因可能不是决定中国汉族人群腰椎DDD的主要危险因素.

Abstract：

Objective To investigate the association between COL9A2 gene polymorphism with lumbar degenerative disc disease (DDD) in Chinese Han population. Methods A total of 125 DDD patients (58 males and 67 femals, aged 51.8 + 10. 6), and 126 controls matched in sex and age (64 males,62 femals, aged 45.7 + 8. 2) were recruited in the case-control study. Peripheral blood was collected for DNA isolation. Results Based on NCBI Genebank, corresponding single nucleotide polymorphisms-SNP1 ( rs12722877), SNP2 ( rs3737820), SNP3 (rs209914) and SNP4 (rs6676013) were identified. Hardy-Weinberg equilibrium was analyzed in both case and control groups. Genotying of all selected SNPs was done by SNPstream technology. The association analysis between phenotyepes and SNPs was conducted.Reslults NPI (rs12722877), SNP2 (rs3737820), SNP3 (rs209914) and SNP4 (rs6676013) were genttyped, and the polymorphisms distributed in line with Hardy-Weinberg equilibrium in case and contral groups. There was no significant difference in allele frequency of SNP1C, SNPIG, SNP2A, SNP2T,SNP3A, SNP3C, SNP4C and SNP4T between case group (91%, 93%, 86%, 89%, 95%, 94%, 12%,and 10%, respectively) and control group (9%, 7%, 14%, 11%, 5%, 6%, 88%, and 90% respectively). No significant difference in genotype frequencies of SNP was found between case group and control group, too (all P＞0.05). Conclusion COL9A2 gene may not be associated with lumbar DDD in ChineseHan population.     

Is there additional effect of MTHFR C677T mutation on lipid abnormalities in renal allograft recipients?

BACKGROUND: The MTHFR C677T mutation and elevated atherogenic lipoprotein levels are known as cardiovascular risk factors in patients with renal transplantation treated with cyclosporine (CsA). The aim of the present study was to eveluate the contribution of MTHFR C677T mutation to the risk of dyslipidemia in renal transplant recipients. We also studied the effect of the MTHFR-C677 T genotype on transplant survival. METHODS: The study included 29 nondiabetic renal transplant recipients and 27 healthy controls. MTHFR C677T genotypes were determined by PCR and RFLP techniques. Biochemical parameters were measured in a computerized autoanalyzer. RESULTS: In the patient group, the distribution of the CC, CT, and TT genotypes was 44.8% (n = 13), 37.9% (n = 11), and 17.2% (n = 5), respectively. The frequencies of the C and T alleles were 0.64 and 0.36, respectively. Subjects with the T allele had the highest levels of TC (P <.05) and LDL-C (P <.05); subjects with the CC genotype had the lowest. CONCLUSIONS: We observed that the MTHFR T allele has an unfavorable effect on serum lipid profile, leading to a rise in the total and LDL cholesterol concentrations. Thus, we believe that MTHFR C allele has a protective effect and MTHFR T allele has a detrimental effect on the serum lipid profile.     

Analysis OF C677T polymorphism in methylene tetrahydrofolate reductase (MTHFR) gene as a risk factor for congenital talipes equino varus (CTEV)

BackgroundClubfoot is a common congenital foot deformity. Low folate status in mothers has been associated with CTEV. Folate metabolism might be affected by Methylene Tetrahydrofolate Reductase (MTHFR) gene polymorphism. The present study was aimed to investigate MTHFR C677T polymorphism and its association with CTEV.MethodsThis is a Case-mother-Dyad study with 30 pairs of cases and controls. Single Nucleotide Polymorphism (SNP) analysis of the MTHFR gene was done in this hospital-based study by polymerase chain reaction and restriction fragment length polymorphism (PCR-RFLP).ResultsIn this study, we observed less relative risk of CTEV in presence of C allele as compared to T allele in children, with Relative Risk- 0.6281 and likelihood ratio of 0.5714. While analysing the correlation of genotype variation in cases (CC = 8(26.66%) and CT = 22(73.33%)) with there biological mother (CC = 13(43.33%) and CT = 17(56.66%)), no significant correlation (p = 0.3110) was found between cases and their biological mother genotype.ConclusionAmong the enrolled cases, there was a significant association of increased CTEV risk with 677T variant allele of MTHFR gene. Also, maternal MTHFR genotype was not found to influence CTEV risk of offspring.