汉族人群Megsin基因C-25663G多态性与IgA肾病的关系

目的研究兰州地区汉族人群Megsin基因C-25663G多态性与IgA肾病的关系。方法采集兰州地区汉族的IgA肾病患者44例及体检正常的兰州地区汉族健康体检人群100例作为对照组的Megsin基因C-25663G,应用聚合酶链反应(PCR)进行检测和分析。结果 IgA肾病组与健康对照组的Megsin基因C-25663G多态性检测结果显示,CC基因型、CG基因型、GG基因型和C型、T型等位基因型均没有显著性差异(P<0.01)。结论 Megsin基因C-25663G多态性与兰州汉族人群IgA肾病的发病可能无关。     

辽宁地区汉族人群中FoxO1基因rs17446614多态性与2型糖尿病的相关性

目的探讨辽宁地区汉族人群中FoxO1基因rs 17446614单核苷酸多态性与2型糖尿病(type 2diabetes mellitus,T2DM)的相关性。方法选取到中国医科大学附属第四医院进行体检的健康人(正常对照)366名及T2DM患者395例,采用分子量阵列技术(MassARRAY)检测FoxO1基因rs 17446614单核苷酸多态性,探讨其与T2DM的相关性。结果糖尿病组与正常对照组rs 17446614基因型均以GG纯合子为多见,分别为78.48%和84.15%,AA纯合子为少见基因型,分别为1.52%和0.27%,两组间比较,差异有统计学意义(P0.05)。等位基因频率均以G为多见;A等位基因为少见基因型,糖尿病组和正常对照组分别为11.52%和8.06%,两组间差异有统计学意义(P0.05)。结论辽宁地区汉族人群FoxO1基因rs 17446614中AA基因型及A等位基因可能是T2DM的易感基因。     

人类白细胞抗原DRB等位基因多态性与克罗恩病遗传易感性的研究

目的　研究人类白细胞抗原 (HLA) DRB等位基因多态性与汉族人克罗恩病 (CD)的遗传易感性的关系。方法　应用基因芯片技术分析了 2 0例汉族CD患者和 2 0例健康对照者HLA DRB的基因分型 ,采用Fisher’s精确概率法比较两组各位点等位基因频率分布的差异。结果　CD患者DRB1 0 4和DRB1 0 7等位基因表达频率明显增高 ,OR分别为 12 6 6 7和 18 379,P <0 0 5 ;DRB1 12等位基因表达频率明显下降 ,OR为 0 14 4 4 ,P <0 0 5。其它等位基因在两组之间差异无显著意义。病变累及回肠者DRB1 0 7等位基因表达频率较病变累及其它部位者显著增加 (P <0 0 5 )。结论　DRB1 0 4和 或DRB1 0 7等位基因可能是我国汉族人群CD的易感基因 ,DRB1 12则为抵抗基因。HLA DR不同基因型的表达与疾病的临床特征有一定关系     

白细胞介素-1B和肿瘤坏死因子-α基因多态性与胃溃疡、胃癌易感性的相关性

目的探讨人群中白细胞介素-1B(IL-1B)和肿瘤坏死因子-α(TNF-α)基因多态性与胃溃疡、胃癌易感性的相关性。方法选取幽门螺杆菌阳性的39例胃溃疡患者、35例胃癌患者和70名健康对照者,采用聚合酶链式反应-限制性片段长度多态性(PCR-RFLP)分析法检测该人群中IL-1B-511、TNF-A-308和TNF-A-857基因多态性。结果疾病组与对照组中IL-1B-511各基因型频率的分布差异无统计学意义。与对照组比较,胃溃疡组TNF-A-308各基因型的频率分布、TNF-A-857各基因型的频率分布以及胃癌组TNF-A-308各基因型的频率分布差异均有统计学意义。经Logistic回归分析,与携带TNF-A-308G/G者比较,携带TNF-A-308A/A者发生胃溃疡的危险性为OR=21.62(95%CI:2.07～226.13);与携带TNF-A-857C/C者比较,携带TNF-A-857T/T者发生胃溃疡的危险性为OR=5.37(95%CI:1.28～22.50);与携带TNF-A-308G/G者比较,携带TNF-A-308A/A者发生胃癌的危险性为OR=16.41(95%CI:1.62～116.55)。结论TNF-α基因多态性与胃溃疡、胃癌的易感性相关。     

血管紧张素Ⅱ2型受体基因多态性与山东济宁地区汉族女性原发性高血压的相关性

目的研究血管紧张素Ⅱ2型受体(AT2R)基因A1675G多态性与山东济宁地区汉族女性原发性高血压(EH)的相关性。方法随机选取山东省济宁地区汉族女性EH患者127例(EH组)和体检正常的女性119例(正常对照组),提取外周血基因组DNA,PCR扩增A1675G基因,高分辨率熔解(HRM)法测定A1675G基因的多态性。结果EH组AA、AG和GG基因型频率(分别为26.8%、53.5%和19.7%)与正常对照组(分别为27.7%、42.0%和30.3%)比较,差异均无统计学意义;等位基因频率(A:53.5%;G:46.5%)与正常对照组(A:48.7%;G:51.3%)比较,差异也无统计学意义。结论A1675G基因多态性可能与山东省济宁地区汉族女性原发性高血压无明显相关性。     

血管紧张素转换酶基因rs4340和rs4343多态性与心房颤动的相关性

目的探讨血管紧张素转换酶(Angiotensin converting enzyme,ACE)基因rs4340和rs4343多态性与心房颤动(简称房颤)的相关性。方法选择重庆地区4家三甲医院就诊的102例房颤患者及同期住院的无房颤病史患者100例,抽取患者静脉血,分别提取基因组DNA,采用单核苷酸多态性-限制性片段长度多态性(Single nucleotide polymorphism,restriction fragmentlength polymorphism,SNP-RFLP)法及基因测序检测ACE基因rs4340和rs4343的基因型。结果房颤组ACE基因rs4340多态性的基因型及等位基因分布与对照组相比,差异无统计学意义(P>0.05),房颤组rs4343的基因型和等位基因分布与对照组间差异有统计学意义(P<0.001或P=0.001)。与对照组相比,房颤组GG+AG基因型频率明显高于AA基因型频率(P<0.001)。II/AA基因型在房颤组中出现的频率明显少于对照组(P=0.001),而II/AG基因型在房颤组中出现的频率明显高于对照组(P=0.002)。房颤组中rs4340和rs4343各基因型左房前后径与右房横径差异均无统计学意义(P>0.05);而将两位点联合分析发现,携带II/AA基因型房颤患者的左房前后径和右房横径均明显小于其他基因型(P<0.001),同时,携带II/AG基因型房颤患者的左房前后径和右房横径均明显大于其他基因型(P<0.001)。结论 ACE基因rs4343多态性与房颤显著相关,II/AA基因型是房颤发生发展的保护因子,而II/AG基因型是预测房颤发生发展的危险因子。     

DNA水平电泳检测重庆地区汉族人MDR1C3435T基因多态性

目的应用DNA水平聚丙烯酰胺凝胶电泳(PAGE)检测重庆地区汉族人MDR1C3435T基因的多态性。方法PCR扩增重庆地区正常汉族人外周血MDR1C3435T基因,以MboⅠ进行限制性酶切,用DNA水平PAGE作图谱分析。结果200名重庆地区汉族人MDR1C3435T基因中,表型T/T的频率为0.15,T/C为0.49,C/C为0.36。MDR1C3435T基因T频率为0.395,基因C为0.605。结论重庆地区汉族人MDR1C3435T基因的分布与我国其他地区人群基本接近,地区差异不明显。DNA水平PAGE为一种简单可靠的基因多态性分析方法,值得在基层单位推广。     

IL-1β-31、IL-10-819和TNF-α-1031基因多态性与幽门螺杆菌感染相关性胃溃疡及胃癌易感性的关系

目的分析人群中IL-1β-31、IL-10-819和TNF-α-1031基因多态性与幽门螺杆菌(H.pylori)感染相关性胃溃疡及胃癌易感性之间的关系,为临床诊断及预防该病提供新的思路和方法。方法选取H.pylori阳性的51例胃溃疡患者、43例胃癌患者和100例健康对照者,采用PCR-限制性长度片段多态法和多重引物特异PCR法,检测其IL-1β-31、IL-10-819和TNF-α-1031位点,分析其多态性。结果在胃溃疡组中TNF-α-1031各基因型的频率分布与健康对照组比较,差异有统计学意义。在胃癌组中TNF-α-1031各基因型的频率分布与健康对照组比较,差异有统计学意义;Logistic回归分析表明,与携带TNF-α-1031T/T者相比,携带TNF-α-1031C/C者发生胃溃疡的危险性为OR=5.84(95%CI:1.00～33.84),发生胃癌的危险性为OR=6.95(95%CI:1.19～40.63)。在疾病组和健康对照组中,IL-10-819和IL-1β-31各基因型频率的分布差异无统计学意义。结论 TNF-α-1031基因多态性与胃溃疡、胃癌的易感性相关。     

IL-27p28基因多态性与中国朝鲜族人群哮喘的相关性

目的探讨IL-27p28基因启动子区g.-964 T>C、第2外显子区g.2905T>G和第4外显子区g.4730T>C 3个位点的多态性与中国朝鲜族人群哮喘的相关性。方法选取32例中国朝鲜族哮喘患者(病例组)和93名中国朝鲜族正常人(对照组)作为观察对象,采用PCR法扩增IL-27p28基因g.-964 T>C、g.2905T>G和g.4730T>C位点基因片段,单碱基延伸法进行基因分型,分析病例组和对照组的基因型频率及等位基因频率。结果病例组和对照组的基因型分布均符合Hardy-weinberg平衡定律(P>0.05)。g.-964位点的基因型频率及等位基因频率在病例组和对照组之间的分布差异有统计学意义(P<0.001);g.2905和g.4730位点的基因频率及等位基因频率在病例组和对照组之间的分布差异无统计学意义(P>0.05)。结论 IL-27p28基因多态位点g.-964 T>C可能与朝鲜族人群哮喘易感性相关,g.2905T>G和g.4730T>C多态性与朝鲜族人群哮喘未发现有相关性。     

Serum Concentrations of Endothelin-1 and Matrix Metalloproteinases-2, -9 in Pre-Hypertensive and Hypertensive Patients with Type 2 Diabetes

Endothelin-1 (ET-1) is one of the most potent vasoconstrictors known to date. While its plasma or serum concentrations are elevated in some forms of experimental and human hypertension, this is not a consistent finding in all forms of hypertension. Matrix metalloproteinases -2 and -9 (MMP-2 and MMP-9), which degrade collagen type IV of the vascular basement membrane, are responsible for vascular remodeling, inflammation, and atherosclerotic complications, including in type 2 diabetes (T2D). In our study, we compared concentrations of ET-1, MMP-2, and MMP-9 in pre-hypertensive (PHTN) and hypertensive (HTN) T2D patients with those of healthy normotensive controls (N). ET-1, MMP-2, and MMP-9 were measured by ELISA. Concentrations of ET-1 in PHTN and N were very similar, while those in HTN were significantly higher. Concentrations of MMP-2 and MMP-9 in PHTN and HTN were also significantly higher compared to N. An interesting result in our study is that concentrations of MMP-2 and MMP-9 in HTN were lower compared to PHTN. In conclusion, we showed that increased production of ET-1 in patients with T2D can lead to long-lasting increases in blood pressure (BP) and clinical manifestation of hypertension. We also demonstrated that increased levels of MMP-2 and MMP-9 in pre-hypertensive and hypertensive patients with T2D mainly reflect the early vascular changes in extracellular matrix (ECM) turnover.     

Association of ER-Alpha Gene Polymorphism with Metabolic Phenotypes in Chinese Hans

Recently, two polymorphisms (rs1884052 and rs3778099) of estrogen receptor α (ER-alpha) gene were identified as being associated with primary quantitative bone mineral density (BMD) in a genome-wide association (GWA) study in Framingham cohorts. In this study we aimed at investigating the association of rs1884052 and rs3778099, and another polymorphism (rs2234693) located at intron 1 of the ER-alpha gene with BMD, body mass index (BMI), glucose, triglyceride, and total cholesterol (CHO) levels in Chinese Hans. We recruited 425 consecutive adult volunteers who had a physical examination in the Jinan Maternity and Child Care Hospital. We did not observe significant association of rs1884052 and rs3778099 with BMD, BMI, glucose, triglyceride, and total cholesterol (CHO) levels. For rs2234693, increased levels of BMD for hip, spine or whole-body regions were consistently observed in TT/TC genotype carriers than in CC genotype carriers, although the board line significance diminished after adjusting for age and gender. However, significant association of rs2234693 with glucose and CHO levels were observed in our sample. Subjects with TC/CC genotypes were associated with an increased level of glucose (p = 0.013) and CHO (p = 0.032) levels than subjects with TT genotypes. In conclusion, we did not confirm the association of rs1884052 and rs3778099 with BMD originally discovered in a GWA study; however, we made novel discoveries that rs2234693 was associated with glucose and CHO levels in Chinese Hans. Y. Chen and X. Jiang have contributed equally.     

Several Lipid-Related Gene Polymorphisms Interact with Overweight/Obesity to Modulate Blood Pressure Levels

Little is known about the interactions of single nucleotide polymorphisms (SNPs) and overweight/obesity on blood pressure levels. The present study was undertaken to detect 10 lipid-related gene SNPs and their interactions with overweight/obesity on blood pressure levels. Genotyping of ATP-binding cassette transporter A1 (ABCA-1) V825I, acyl-CoA:cholesterol acyltransferase-1 (ACAT-1) rs1044925, low density lipoprotein receptor (LDL-R) AvaII hepatic lipase gene (LIPC) −250G > A, endothelial lipase gene (LIPG) 584C > T, methylenetetrahydrofolate reductase (MTHFR) 677C > T, the E3 ubiquitin ligase myosin regulatory light chain-interacting protein (MYLIP) rs3757354, proprotein convertase subtilisin-like kexin type 9 (PCSK9) E670G, peroxisome proliferator-activated receptor delta (PPARD) +294T > C, and Scavenger receptor class B type 1 (SCARB1) rs5888 was performed in 978 normal weight and 751 overweight/obese subjects. The interactions were detected by factorial regression analysis. The genotypes of ACAT-1 AC, LIPC GA and AA, and SCARB1 TT; LDL-R A-A- and LIPC GA; and SCARB1 TT were interacted with overweight/obesity to increase systolic, diastolic blood pressure (SBP, DBP) and pulse pressure (PP) levels; respectively. The genotypes of ACAT-1 CC; ACAT-1 AA and CC were interacted with overweight/obesity to decrease SBP, PP levels (p < 0.01–0.001); respectively. The differences in blood pressure levels between normal weight and overweight/obese subjects might partly result from different interactions of several SNPs and overweight/obesity.     

Hepatic Lipase Gene −514<Emphasis Type="Italic">C</Emphasis>/<Emphasis Type="Italic">T</Emphasis> Polymorphism in the Guangxi Hei Yi Zhuang and Han Populations

Hei Yi Zhuang is an isolated subgroup of the Zhuang minority in China. This study was designed to compare the difference in the hepatic lipase gene (LIPC) -514C/T polymorphism and its association with lipid profiles between the Guangxi Hei Yi Zhuang and Han populations. Genotyping of the LIPC -514C/T was performed in 873 subjects of Hei Yi Zhuang and 867 participants of Han Chinese. The frequency of -514T allele was 43.47% in Hei Yi Zhuang, and 36.10% in Han (P < 0.001). The frequencies of CC, CT and TT genotypes were 30.01, 53.04 and 16.95% in Hei Yi Zhuang, and 40.95, 45.91 and 13.14% in Han (P < 0.001); respectively. Serum high-density lipoprotein cholesterol (HDL-C) and apolipoprotein B levels in both ethnic groups were higher in LIPC -514T carriers than in C carriers. In addition, serum triglyceride levels in Han were higher in TT genotype individuals than in CC genotype subjects (P < 0.05). Serum HDL-C levels were positively correlated with age, alcohol consumption and LIPC -514C/T genotypes, and negatively associated with hypertension and cigarette smoking in Hei Yi Zhuang (P < 0.05-0.01), whereas HDL-C levels were positively correlated with age, alcohol consumption and LIPC -514C/T genotypes, and negatively associated with body mass index and cigarette smoking in Han (P < 0.05-0.001). The differences in serum HDL-C levels between the two ethnic groups might partially attribute to the differences in the LIPC -514C/T polymorphism.     

基质金属蛋白酶MMP-2及MMP-9在淋巴系肿瘤中的表达

目的探讨基质金属蛋白酶ProMMP-2、MMP-2、ProMMP-9和MMP-9与淋巴系肿瘤的相关性。方法应用明胶酶谱(SDS-PAGE Zymograph)和计算机蛋白定量测定系统,对62名淋巴系肿瘤患者(初发组35名,复发组12名,缓解组15名)和20名正常人,测定其血清中ProMMP-2、MMP-2、ProMMP-9和MMP-9的表达水平。结果初发组、复发组患者血清中ProMMP-2、MMP-2和MMP-9的表达水平明显高于缓解组和对照组。而初发组、复发组患者血清中ProMMP-9表达水平与缓解组和对照组差异无显著意义;初发组患者血清中ProMMP-2、MMP-2、ProMMP-9和MMP-9表达水平与复发组相比差异无显著意义。缓解组患者血清中ProMMP-2、MMP-2、ProMMP-9和MMP-9表达水平与对照组差异无显著意义。结论MMP-2和MMP-9与淋巴组织恶性肿瘤发生及发展呈正相关;ProMMP-2、MMP-2和MMP-9可作为判断病情及评价治疗效果的指标;为进一步研制相关MMP抑制剂及为淋巴组织肿瘤治疗提供新的靶向位点奠定了基础。     

Association of miR-499 Polymorphism and Its Regulatory Networks with Hashimoto Thyroiditis Susceptibility: A Population-Based Case-Control Study

Hashimoto thyroiditis (HT) is a common autoimmune disorder with a strong genetic background. Several genetic factors have been suggested, yet numerous genetic contributors remain to be fully understood in HT pathogenesis. MicroRNAs (miRs) are gene expression regulators critically involved in biological processes, of which polymorphisms can alter their function, leading to pathologic conditions, including autoimmune diseases. We examined whether miR-499 rs3746444 polymorphism is associated with susceptibility to HT in an Iranian subpopulation. Furthermore, we investigated the potential interacting regulatory network of the miR-499. This case-control study included 150 HT patients and 152 healthy subjects. Genotyping of rs3746444 was performed by the PCR-RFLP method. Also, target genomic sites of the polymorphism were predicted using bioinformatics. Our results showed that miR-499 rs3746444 was positively associated with HT risk in heterozygous (OR = 3.32, 95%CI = 2.00–5.53, p < 0.001, CT vs. TT), homozygous (OR = 2.81, 95%CI = 1.30–6.10, p = 0.014, CC vs. TT), dominant (OR = 3.22, 95%CI = 1.97–5.25, p < 0.001, CT + CC vs. TT), overdominant (OR = 2.57, 95%CI = 1.62–4.09, p < 0.001, CC + TT vs. CT), and allelic (OR = 1.92, 95%CI = 1.37–2.69, p < 0.001, C vs. T) models. Mapping predicted target genes of miR-499 on tissue-specific-, co-expression-, and miR-TF networks indicated that main hub-driver nodes are implicated in regulating immune system functions, including immunorecognition and complement activity. We demonstrated that miR-499 rs3746444 is linked to HT susceptibility in our population. However, predicted regulatory networks revealed that this polymorphism is contributing to the regulation of immune system pathways.