细胞色素氧化酶基因CYP1A2多态性与新疆汉族和维吾尔族人群冠心病的相关性

目的 探讨新疆地区维吾尔（维）族人群、汉族人群细胞色素氧化酶基因CYP1A2（cytochrome c oxidase P1A2）多态性与冠心病的关联性。 方法 我们采用两项独立的病例对照研究∶汉族人群389例冠心病患者(病例组）和411名健康体检者（对照组）;维族人群293冠心病患者（病例组）和408名健康体检者（对照组）。通过实时PCR对CYP1A2基因单核苷酸多态性（SNPs）rs2069522和rs2472304进行基因分型。 结果 仅在汉族人群中,SNP1 (rs2069522)基因型的分布在冠心病组和对照组之间差异均有统计学意义(P < 0.05)。而维族人群中未见显著差异。新疆汉族病例组SNP1 (rs2069522)显性模型(CC vs CT + TT)基因型频率显著高于对照组。调整混杂因素后logistic回归分析表明,新疆汉族人群CC基因型患冠心病的风险显著高于CT + TT基因型者(总体:OR = 1.982,95%CI: 1.174～3.236, P < 0.01;男性: OR = 2.671,95%CI: 1.548～4.314, P < 0.01)。 结论 新疆汉族人群CYP1A2基因中rs2069522的位点与冠心病相关。CC基因型可能是新疆汉族人群而非维吾尔族人群发生冠心病的独立危险因素。     

广西壮族人群TLR2基因rs2289318G/C和rs3804100T/C的多态性研究

［摘要］　目的　探讨广西壮族人群Toll样受体2(TLR2)基因rs2289318G/C和rs3804100T/C多态性,比较其与不同地区及种族的分布差异。方法　采用单碱基延伸技术和DNA测序法对210名广西壮族健康体检者的TLR2基因rs2289318G/C和rs3804100T/C进行基因分型,分析其基因多态性,并与千人基因组计划数据库公布的美国西南部非洲裔(ASW)、巴巴多斯的加勒比非洲裔(ACB)、尼日利亚伊巴丹的约鲁巴人(YRI)、美国人（AMR）、日本东京的日本人(JPT)、欧洲人(EUR)、南亚人(SAS)、中国北京的汉族人(CHB)的基因型进行比较。结果　广西壮族人群TLR2基因rs2289318G/C位点存在GG、CG和CC基因型,其频率分别为58.57%、37.62%和3.81%;G和C等位基因频率分别为77.38%和22.62%。rs3804100T/C位点存在TT、CT和CC基因型,其频率分别为57.62%、38.10%和4.29%;T和C等位基因频率分别为76.67%和23.33%。在广西壮族人群中,TLR2基因rs2289318G/C和rs3804100T/C位点的基因型和等位基因频率在不同性别间比较差异均无统计学意义(P>0.05)。广西壮族人群rs2289318G/C等位基因与SAS比较差异有统计学意义(P<0.05),但其基因型与SAS比较差异无统计学意义（P>0.05）;rs2289318G/C等位基因及等位基因频率与ACB、ASW、YRI、AMR、JPT、EUR、CHB比较差异均无统计学意义(P>0.05)。广西壮族人群rs3804100T/C位点的基因型及等位基因频率与ACB、ASW、YRI、AMR、EUR、SAS、CHB比较差异均有统计学意义(P<0.05),而与JPT比较差异无统计学意义(P>0.05)。结论　广西壮族人群TLR2基因rs2289318G/C、rs3804100T/C多态性与不同种族人群比较存在差异。     

广西壮族人群SLC2A9基因多态性位点与原发性痛风的关联性研究

［摘要］　目的　探讨广西壮族人群可溶性载体2家族成员9（SLC2A9）基因单核苷酸多态性（SNPs）与原发性痛风的关联性。方法　收集广西壮族人群246例原发性痛风患者和202名健康对照者的临床资料及血尿酸（UA）、空腹血糖、甘油三酯(TG)、总胆固醇（TC）、高密度脂蛋白（HDL-C）、低密度脂蛋白（LDL-C）、肌酐（Cr）、尿素氮（BUN）等实验室指标,比较两组临床及实验室指标的差异。Taqman-MGB探针法检测SLC2A9基因4个位点(rs10489070、rs734553、rs3733591、rs16890979)的基因型,比较两组基因型及等位基因分布频率。结果　痛风组的体质量指数（BMI）、TG、TC、LDL-C、Cr、UA水平显著高于对照组（P<0.05）。有痛风石的患者年龄更大,病程更长,累及关节数更多,肾结石发生率更高,TG、TC、LDL-C、Cr、UA水平更高,差异均有统计学意义（P<0.05）。rs10489070和rs3733591在痛风组与对照组基因型及等位基因分布频率差异有统计学意义（P<0.05）,携带C等位基因的个体发生痛风的OR值分别为1.413（95%CI：1.009～1.980）和1.739（95%CI：1.331～2.271）。rs3733591（CC）（aOR=2.113,95%CI：1.536～3.951）、rs10489070（CC）（aOR=1.981,95%CI：1.123～3.156）是痛风发生的独立危险因素。rs3733591（CC）（aOR=2.358,95%CI：1.114～3.221）、rs10489070（CC）（aOR=2.115,95%CI：1.689～4.547）是痛风石发生的独立危险因素。结论　我国壮族人群中,SLC2A9基因的rs10489070（CC）和rs3733591（CC）基因型是痛风和痛风石的独立危险因素,但目前易感位点影响痛风发病的具体机制尚不明确,下一步需要进行相关SNPs功能的研究。     

褪黑色素受体1B基因多态性与妊娠期糖尿病的相关性研究

目的探讨我国褪黑色素受体1B(MTNR1B)基因SNP位点rs10830963和rs1387153的多态性与妊娠期糖尿病(GDM)遗传易感性的关系。方法采用病例对照研究,分别选取GDM患者(GDM组)184例和对照(NC)组235名,利用PCR-RFLP的方法测定2个SNP位点多态性分布,并进行统计学分析。结果 GDM组FPG高于NC组(P=0.039),但孕前BMI比较差异无统计学意义。SNP位点rs10830963基因型(GG,GC,CC)频率、等位基因频率与NC组比较,差异均无统计学意义(P=0.637,P=0.422)。而SNP位点rs1387153基因型(TT,CT,CC)与NC组比较,差异有统计学意义(P=0.012),且风险基因型TT的频率高于NC组(TTvs TC+CC,P=0.01)。GDM组T等位基因高于NC组(OR:1.517,95%CI:1.147~2.006,P=0.003),且该SNP位点的TT基因型的GDM患者FPG高于其他两个基因型的患者。结论 MTNR1B基因SNP位点rs10830963与GDM无相关性,而SNP位点rs1387153与GDM的易感性相关。     

内皮脂肪酶584C/T多态性与急性冠脉综合征相关性研究

目的:探讨内皮脂肪酶(endothelial lipase,EL)基因 584C/T多态性与急性冠脉综合征(acute coronary syndrome,ACS)及血脂的相关性。方法: 采用聚合酶链反应-限制性片段长度多态性方法检测324例ACS患者和299例健康体检者内皮脂肪酶基因584C/T基因型。结果: ACS组血清HDL、ApoA-I水平及ApoA-I/ApoB明显低于对照组,而LP(α)却明显高于对照组。中国常州地区汉族人群存在EL 584C/T基因多态性,基因型及等位基因频率分布符合Hard-Weinberg平衡。ACS组CC、CT、TT基因型频率分别为60.2%、35.8%、4.0%;对照组CC、CT、TT基因型频率分别为56.2%、40.8%、3.0%;两组间基因型频率分布无统计学意义（P=0.389）。ACS组C等位基因频率为78.1%;对照组C等位基因频率为76.6%,两组间等位基因频率差异也无统计学意义（P=0.528)。经校正性别、年龄、糖尿病、高血压、吸烟、高脂血症等冠心病危险因素后,结果仍然表明该多态性与ACS无明显相关性。T等位基因携带者（CT+TT）血脂水平及其比值与CC基因型者比较差异无统计学意义。结论: 中国常州地区汉族人群EL 584C/T基因多态性与ACS无明显相关性,与血脂及其比值也无明显相关性,EL 584C/T多态性可能不是中国常州地区汉族人群ACS发病的易感因素。     

SLC52A3基因多态性与鼻咽癌易感性的关系

目的探讨核黄素转运蛋白SLC52A3基因单核苷酸多态性(SNPs)与鼻咽癌易感性的关系。方法采用Haploview软件从国际人类基因组单体型图计划(Hap Map)公布的北京汉族人群基因型数据库中筛选出SLC52A3基因3个标签SNPs(rs13042395、rs3746803及rs3746804),收集147例鼻咽癌患者外周血标本并采用直接测序法进行基因分型,选取159例健康体检者的外周血作对比,采用Hardy-Weinberg平衡分析3个SNPs位点的遗传平衡情况,比较鼻咽癌患者与健康对照rs13042395、rs3746803及rs3746804基因型和等位基因的分布差异并计算比值比(OR)及其95%置信区间(CI)来评价以上SNPs与鼻咽癌易感性的关系,同时分析SLC52A3 SNPs与常见临床病理参数的关系。结果 147例鼻咽癌患者rs13042395、rs3746803及rs3746804基因型和等位基因的分布符合Hardy-Weinberg平衡。疾病组与对照组rs13042395基因型分布的差异无统计学意义(P>0.05),但疾病组等位基因C的比例高于对照组(P<0.05),其中以CC基因型为参照,TT及CT+TT基因型发生鼻咽癌的风险降低至0.522、0.575倍(P<0.05),T相对于C等位基因发生鼻咽癌的风险降低至0.719倍(P<0.05)。rs3746804分布上,疾病组TT基因型及等位基因T的比例均低于对照组,差异有统计学意义(P<0.05),其中以CC基因型为参照,CT、TT及CT+TT基因型发生鼻咽癌的风险降低至0.501、0.400和0.466倍(P<0.05);以C等位基因为参照,T发生鼻咽癌的风险降低至0.588倍(P<0.05)。rs3746803基因型及等位基因分布与鼻咽癌易感性无关。结论SLC52A3 rs13042395、rs3746804与鼻咽癌易感性及临床分期有关,其中携带等位基因T的鼻咽癌发生风险降低,在鼻咽癌早期筛查中有一定价值。     

长治老年人群血浆同型半胱氨酸水平与MTHFRC677T基因多态性

目的探讨长治地区健康老年人群血浆同型半胱氨酸(HCY)水平与N5,N10-亚甲基四氢叶酸还原酶(MTHFR)C677T基因位点的基因多态性。方法采用酶联免疫吸附法进行血浆HCY水平测定;采用聚合酶链反应-限制性片段长度多态性法(PCR-RFLP)对MTHFR C677T进行基因多态性分析。结果长治地区健康老年人群血浆HCY水平为(11.0±3.1)μmol/L,与健康青年人群相比,无统计学差异(P0.05)。老年人群中MTHFR C677T基因的CC、CT和TT基因型频率分别为15.38%、48.72%和35.90%,与青年人群相比,两者差异无统计学性(P0.05);老年人群C、T等位基因频率分别为39.74%和60.26%,与青年人群相比,两者差异无统计学意义(P0.05)。MTHFR C677T基因型频率在长治地区健康老年人群、青年人群中均符合Hardy-Weinberg平衡。健康老年人群MTHFR C677T位点各基因型间,血浆HCY水平亦无显著差异。健康老年人群、青年人群TT基因型血浆HCY水平差异显著(P0.05)。结论长治人群MTHFR C677T纯合突变基因型频率高,且老年人群TT基因型血浆HCY水平显著高于青年人群。     

G蛋白β_3亚单位基因C825T多态性影响缬沙坦的降压疗效

目的探讨G蛋白β3亚单位基因C825T多态性与缬沙坦的降压疗效的关系。方法采用聚合酶链反应限制片段长度多态性方法检测147例健康人(对照组)和321例高血压病患者(高血压组)的G蛋白β3亚单位C825T多态性,其中102例高血压病患者口服缬沙坦4周。结果高血压组G蛋白β3亚单位C825T多态性中基因型频率(CC28.7%、CT 52.0%、TT 19.3%)、等位基因频率(C 54.7%、T 45.3%)与对照组基因型频率(CC 27.2%、CT 46.9%、TT25.9%)、等位基因频率(C 50.7%、T 49.3%)比较无显著性差异;缬沙坦对CT[(18.29±11.17)mm Hg,1 mm Hg=0.133 kPa]、TT[(25.63±22.68)mm Hg]、CT+TT[(19.25±13.20)mm Hg]基因型患者降低收缩压的作用强于CC基因型[(11.33±9.15)mm Hg,P<0.05];对CT[(15.03±9.35)mm Hg]、CT+TT[(14.50±9.23)mm Hg]基因型患者降低舒张压的作用强于CC基因型[(8.81±5.60)mm Hg,P<0.05]。结论G蛋白β3亚单位基因C825T多态性与缬沙坦的降压疗效相关,而与原发性高血压无关。     

MTHFR基因多态性与河南中部地区汉族人群急性冠脉综合征发生的关联性研究

目的探讨5,10-亚甲基四氢叶酸还原酶(MTHFR)基因多态性与河南中部地区汉族人群急性冠脉综合征(ACS)发生的关联性。方法招募河南中部地区汉族ACS患者280例作为观察组,选取同期行健康体检的河南中部地区汉族健康受试者286名作为对照组。采用荧光染色原位杂交技术检测两组MTHFR基因C677T、A1298C位点基因型,比较两组受试者各基因型及等位基因分布的差异,采用二元Logistic回归分析MTHFR基因多态性与ACS发生的关联性。结果两组各基因型分布频率均符合Hardy-Weinberg平衡(P0.05)。对照组MTHFR C677T位点CC、CT、TT型分布频率分别为31.82%、47.90%、20.28%,MTHFR A1298C位点AA、AC、CC型分布频率分别为73.78%、21.68%、4.54%;观察组MTHFR C677T位点CC、CT、TT型分布频率分别为16.43%、40.71%、42.86%,MTHFR A1298C位点AA、AC、CC型分布频率分别为69.29%、27.14%、3.57%。两组受试者MTHFR C677T各基因型分布频率及等位基因频率比较差异有统计学意义(P0.05),而MTHFR A1298C各基因型分布频率及等位基因频率比较差异无统计学意义(P0.05)。二元Logistic回归分析显示,MTHFR C677T基因型是ACS发生的影响因素(P0.05),以TT型为参照,CC型发生ACS的可能性是TT型的24.4%,CT型发生ACS的可能性是TT型的40.2%。结论 MTHFR基因多态性与河南中部地区汉族人群ACS发生有关,其中C677T位点突变可能是ACS发生的影响因素,而A1298C位点基因多态性与ACS发生的关联性较低。     

血管内皮生长因子基因多态性与糖尿病视网膜病变的相关性

目的探讨血管内皮生长因子（VEGF）-460C/T基因多态性与糖尿病视网膜病变（DR）的相关性。方法病史超过10年的2型糖尿病（T2DM）患者204例,分为非增殖型视网膜病变组（NP-DR,65例）、增殖型视网膜病变组（PDR,64例）及单纯2型糖尿病组（DM,75例）。用PCR-RFLP方法检测各组基因型,比较各组基因型和等位基因的频率。结果DR组VEGF-460位点TT基因型频率显著低于DM组（P〈0.01）,C等位基因频率显著高于DM组（P〈0.01）;NPDR组与PDR组基因型和等位基因频率差异无统计学意义（P〉0.05）。DM中CC、CT、TT基因型的DR发生率分别为69.8%、68.9%和42.2%,CC和CT基因型的DR发生率显著高于TT基因型（P〈0.01）。结论VEGF-460C/T多态性与DR的发生发展有关,C等位基因可能是DR的易感基因。     

山西长治地区健康林州移民及食管鳞癌患者血浆核黄素水平的比较及其意义

目的 探讨核黄素缺乏与食管鳞癌发生的关系.方法 采用ELISA法检测山西长治地区食管鳞癌患者(445例)、长治当地健康人群(689例)及健康林州移民(347例)3组人群的血浆中核黄素水平并比较其差异.结果 长治地区食管鳞癌患者[ (731.69 ±330.67) μg/L]血浆中核黄素水平显著低于长治当地健康人群[(1090.43±445.08) μg/L]和健康林州移民[(897.58±177.78)μg/L],P值均＜0.05;而长治当地健康人群血浆中核黄素水平高于健康林州移民,P＜0.05.结论 在食管鳞癌患者中存在核黄素缺乏现象,长治本地健康人群血浆中核黄素水平高于健康林州移民,具体机制有待于进一步研究.     

Effect of peroxisome proliferator‐activated receptors‐γ and co‐activator‐1α genetic polymorphisms on plasma adiponectin levels and susceptibility of non‐alcoholic fatty liver disease in Chinese people

Background/Aims: Peroxisome proliferator‐activated receptors‐γ (PPAR‐γ) and its co‐activator‐1α (PGC‐1α) are involved in the regulation of lipid and glucose metabolisms. This study aimed to investigate the genetic polymorphisms of PPAR‐γ and PGC‐1α in Chinese people and their influence on plasma adiponectin levels and non‐alcoholic fatty liver disease (NAFLD) susceptibility. Methods: Ninety‐six patients with NAFLD and 96 healthy controls were included. The single nucleotide polymorphisms (SNPs) of C161T PPAR‐γand Gly482Ser PGC‐1α genes were analysed by polymerase chain reaction and restriction fragment length polymorphism. Result: The CC, CT and TT genotypic distributions of the NAFLD group were significantly different from those of controls (55.2, 39.6, 5.2 vs. 74.0, 25.0, 1.0%; P=0.015). The allelic frequencies of C and T were also different between the two groups (P=0.004). As for the PGC‐1α gene, there was no difference of the genotypic and allelic frequencies between the two groups (P>0.05). In NAFLD patients, the plasma adiponectin concentrations were lower in the PPAR‐γ CT/TT genotypes compared with those in the CC genotype group (3.0±0.6 vs. 4.3±0.9, P=0.02). Multivariate logistic regression analysis showed that CT/TT genotypes of PPAR‐γ, TG, waist hip ratio, hypoadiponectinaemia and homoeostasis model assessment (HOMA)‐IR were the risk factors for NAFLD. Conclusion: SNPs in the PPAR‐γ, but not PGC‐1α, gene are associated with NAFLD susceptibility possibly through the adiponectin pathway.     

Lack of association of Toll-like receptor 9 polymorphisms with susceptibility to systemic lupus erythematosus in an Asian population: a meta-analysis

Abstract

The association of Toll-like receptor 9 (TLR9) gene polymorphisms with systemic lupus erythematosus (SLE) risk remains controversial and ambiguous. To more precisely estimate the relationship between TLR9 gene polymorphisms and the susceptibility to SLE, a meta-analysis was performed. A total of seven independent studies were involved in this analysis. Meta-analysis was performed for three TLR9 gene polymorphisms (rs187084, rs352139, and rs352140). We have compared allele or genotype frequencies of the polymorphisms in SLE patients and controls. When available studies were pooled into the meta-analysis, there was no evidence showing a significant association between rs187084 and SLE risk in an Asian population (for C vs. T: OR = 0.81, P = 0.117; for CC vs. TT: OR = 0.71, P = 0.158; for CT vs. TT: OR = 0.86, P = 0.085; for CC + CT vs. TT: OR = 0.78, P = 0.093; for CC vs. CT + TT: OR = 0.81, P = 0.285). Similar results were found between rs352139 and SLE. No significant association was detected in any genetic model in the Asian population either (for G vs. A: OR = 1.11, P = 0.095; for GG vs. AA: OR = 1.32, P = 0.238; for GA vs. AA: OR = 1.17, P = 0.084; for GG + GA vs. AA: OR = 1.17, P = 0.073; for GG vs. GA + AA: OR = 1.17, P = 0.404). We found no association between TLR9 gene rs352140 polymorphism and SLE in the Asian population (for A vs. G: OR = 1.02, P = 0.728). In conclusion, there is still not enough evidence to indicate an association between TLR9 gene rs187084, rs352139, and rs352140 polymorphisms and the development of SLE in the Asian population.     

Genetic polymorphism of IL28B in hepatitis C‐infected haemophilia patients in Israel

Single‐nucleotide polymorphisms (SNPs) near the IL28B gene were identified as major predictors of treatment response (sustained virologic response – SVR) and spontaneous clearance of HCV. Haemophilia patients have the highest prevalence of HCV, and are a unique target for genetic studies. The Israeli population is ethnically heterogeneous; therefore, genetic variability is anticipated. To determine the IL28B haplotypes in HCV‐infected haemophilia patients and association with SVR and spontaneous viral clearance. IL28B polymorphism at SNPs rs12979860 and rs8099917 was determined in sera obtained from 130 HCV‐infected haemophilia patients. The frequency of the various haplotypes was analysed according to treatment response, spontaneous HCV clearance, viral load and degree of fibrosis. The CC haplotype at SNP rs12979860 was found in 31% of patients, whereas the TT genotype at SNP rs8099917 was detected in 57% of cases. SVR was achieved in 70% of patients carrying the CC haplotype (P = 0.0196 vs. CT/TT), and 50% of the TT genotype at SNP rs8099917 (P = 0.0227 vs. TG/GG). Thirty‐five percent of patients carrying the CC haplotype and 26% with the TT genotype at SNP rs8099917 showed spontaneous clearance of HCV infection (P = 0.00262 vs. CT/TT; and P = 0.00371 vs. TG/GG respectively). The C‐allele frequency was exceptionally high (71%) in immigrants from the Asian republics of Russia. In HCV‐infected haemophilia patients, SVR was more commonly achieved among patients who had the CC ( rs12979860 ) or TT ( rs8099917 ) genotype. Likewise, patients who possess harbour the CC or TT genotypes were more likely to clear HCV infection spontaneously. A unique distribution of the CC genotype was observed in some ethnic groups.     

Association of genetic polymorphisms in PTEN and additional gene–gene interaction with risk of esophageal squamous cell carcinoma in Chinese Han population

This study aims to investigate the association of five single nucleotide polymorphisms (SNPs) in the phosphatase and tensin homologue (PTEN) gene and additional role of gene–gene interaction with esophageal squamous cell carcinoma (ESCC), based on a Chinese case–control study. A total of 871 subjects (420 males and 451 females) were selected, including 425 ESCC cases and 446 controls. Five SNPs were selected for genotyping in the case–control study: rs2735343, rs555895, rs2299939, rs17431184 and rs701848. Logistic regression model was used to examine the association between five SNP and ESCC, and additional interaction among five SNP, odds ratio (OR) and 95% confident interval (95%CI) were calculated. All genotypes were distributed according to Hardy–Weinberg equilibrium in controls. The carriers of homozygous mutant of rs2735343 and rs701848 polymorphism revealed increased ESCC risk than those with wild‐type homozygotes, and OR (95%CI) were 1.27 (1.09–2.08) and 1.45 (1.17–1.98), respectively. We also found a potential gene–gene interaction between rs2735343 and rs701848 (P = 0.0010), and a potential gene–gene interaction among all five SNP (P = 0.0107) after covariates adjustment. Subjects with TC or CC of rs2735343 and TC or CC of rs701848 genotype have highest ESCC risk, compared to subjects with TT of rs2735343 and TT of rs701848 genotype, OR (95% CI) was 2.76 (1.37–3.45) after covariates adjustment. The carriers of homozygous mutant of rs2735343 and rs701848 polymorphism revealed increased ESCC risk. We also found a potential gene–gene interaction between rs2735343 and rs701848 and a potential gene–gene interaction among all five SNPs.     

肝脂酶基因rs3829461位点多态性与脑梗死及血脂的相关性研究

目的探讨上海汉族人群肝脂酶基因rs3829461位点多态性与脑梗死以及血脂水平之间的关联性。方法采用PCR-RFLP技术检测326例脑梗死患者(脑梗死组)和231例健康体检者(对照组)肝脂酶rs3829461位点多态性基因型及其与血脂水平之间的关系。结果脑梗死组rs3829461 CC、TC、TT基因型频率分别为85.58%、13.50%、0.92%,对照组分别为77.62%、22.51%、0.87%,2组比较差异有统计学意义(P<0.05)。脑梗死组HDL-C明显低于对照组,TC、LDL-C明显高于对照组,差异有统计学意义(P<0.05)。脑梗死组男性患者肝脂酶位点rs3829461基因型CT+TT型血脂水平与CC型比较差异无统计学意义(P>0.05);女性患者CT+TT型HDL-C明显高于CC型,差异有统计学意义(P<0.05)。多因素logistic回归分析显示,肝脂酶rs3829461多态性CC型是脑梗死的危险因素(OR=1.885,95%CI:1.204～2.859,P=0.005)。结论肝脂酶位点rs3829461多态性CC型与脑梗死及血脂水平相关。肝脂酶rs3829461基因型CC型可以导致患者的低HDL-C血症,可能增加患者脑梗死的易感性。     

Functional single nucleotide polymorphism in C20orf54 modifies susceptibility to esophageal squamous cell carcinoma

The aim of this study was to explore the association of C20orf54 functional single nucleotide polymorphism (SNP) with the susceptibility to esophageal squamous cell carcinoma (ESCC) in a northern China population. The C20orf54 SNP was genotyped by direct sequencing in 240 cancer patients and 198 controls in northern China. The results showed that drinking status, family history of ESCC, and body mass index have great influence on the risk of developing ESCC. The overall genotype frequencies of C20orf54 in ESCC patients have a significant difference with healthy controls (χ² = 8.06, P = 0.018). By using C/C genotype as the reference, the C/T genotype showed a significantly decreased risk to the development of ESCC. Thus, compared with the C/C genotype, smokers, drinkers with C/T genotype significantly decreased the risk of developing ESCC. A positive family history of ESCC with C/T and T/T genotype both increased the risk of developing ESCC. Body mass index between 18.5 and 24 with C/T genotype significantly decreased the risk of developing ESCC. The present study suggests that the C20orf54 functional SNP might be associated with a risk of development in ESCC.     

DNMT3B基因启动子单核苷酸多态性C46359T与急性白血病的关系

目的探讨DNMT3B基因启动子C46359T单核苷酸多态性与急性白血病(AL)发病的关系。方法采用PCR-RFLP结合DNA测序技术检测160例AL患者及240例正常对照DNMT3B基因启动子C46359T单核苷酸多态性。结果中国汉族人中CT杂合型的频率为2·5%,TT纯合型的频率为97·5%,未检出CC纯合型;与美国白种人的基因型分布(三种基因型频率分别为41·8%、23·2%和35·0%)存在显著差异(P<0·001)。在160例初发的成人AL患者中CT杂合型的频率为10·6%,明显高于正常对照组(2·5%),P<0·001,提示在AL患者中CT基因型是一个高发现象。正常人中CT基因型发生AL的危险性是TT基因型的4·669倍(OR=4·669,95%可信区间为1·700~14·747),说明CT基因型与AL的发生有一定的相关性。结论DNMT3B基因启动子-149位CT基因型与AL发病相关;中国汉族人的DNMT3B基因启动子-149位基因型分布与美国白种人有显著不同。     

Genetic Variation in Metastasis-Associated in Colon Cancer-1 and the Risk of Breast Cancer Among the Chinese Han Population: A STROBE-Compliant Observational Study

Metastasis-associated in colon cancer-1 (MACC1), a newly identified oncogene, is involved in angiogenesis, invasiveness, and metastasis in many cancers. Epidemiological studies have indicated the associations between MACC1 polymorphisms and cancer risk. However, the association between genetic polymorphisms in MACC1 and breast cancer (BC) was not clear. This study aimed to evaluate the relationship between MACC1 polymorphisms and BC risk.We genotyped 4 single-nucleotide polymorphisms (SNPs) in MACC1 (rs975263, rs1990172, rs3735615, rs4721888) to determine the haplotypes in 560 BC patients and 583 age-, sex-, and ethnicity-matched healthy individuals. Genotypes were determined using the Sequenom MassARRAY method. We estimated the odds ratios (ORs) and 95% confidence intervals (95% CIs) using the chi-square test.There were significant differences between patients and controls in the MACC1 rs975263 allelic (T vs C: OR = 0.76, 95% CI = 0.61–0.95, P = 0.014) and genotypic groups (TC vs TT: OR = 0.70, 95% CI = 0.54–0.92, P = 0.009; TC+CC vs TT: OR = 0.71, 95% CI = 0.55–0.92, P = 0.008). Analysis of clinical features demonstrated significant associations between rs975263 and Scarff–Bloom–Richardson (SBR) grade 3 cancer (P = 0.006) and postmenopausal women (P = 0.018). Compared with the rs4721888 CC genotype, the frequency of rs4721888 GC and GC+CC variants was higher in patients. Further analysis revealed that the variant genotypes were positively associated with lymph node metastasis. However, we failed to find any relationships between rs1990172 or rs3735615 polymorphism and BC risk. In addition, haplotype analysis indicated that the CTGG and CTCG haplotypes (rs975263, rs1990172, rs3735615, rs4721888) were significantly associated with decreased susceptibility to BC (P = 0.029 and 0.019 respectively).Our results suggest that rs975263 and rs4721888 polymorphisms in MACC1 are associated with the risk of BC susceptibility and may be involved in the progression of BC in Chinese women.