Job Stress, Gene Polymorphism of β2-AR, and Prevalence of Hypertension

Objective To study the interactive effect of job stress and genetic susceptibility (or gene polymorphism) on hypertension. Methods A cross-sectional epidemioiogical study was conducted in 452 workers from a thermal power plant in China. Extrinsic effort, occupational reward, and over-commitment were measured. Hypertensive patients were defined by three phases of screening, reexamination, and final diagnosis. β2-AR genotypes and allele frequencies at amino acid positions 16 (β2-AR-16:Arg→Gly) and 27(β2-AR-27:Gln→Glu) were identified by PCR-RFLP. Results Job stress was related with the prevalence of hypertension in males (P<0.05), whereas no significant relationship was found in females (P>0.05). Differences in genotypes and allele frequencies of the β2-AR-16 were statistically significant between the hypertension and control groups (P<0.05), whereas those of β2-AR-27 were not (P>0.05). The prevalence of hypertension was higher in individuals carrying Gly16 allele than in those carrying Arg16 allele of the high job stress group (P<0.01 or 0.05). Conclusion High job stress and polymorphism of β2-AR-16 have an interactive effect on the prevalence of hypertension in male workers.     

Primary study on correlation between β2-adrenoceptor haplotypes and asthma in children of Han nationality in Chongqing

Objective: To investigate the correlation between β2-adrenergic receptors (β2-AR) haplotypes and asthma of Hah nationality children in Chongqing region. Methods: PCR and restriction fragment analysis were used to study 16, 27loci of the β2-AR polymorphism in 76 unrelated asthmatic children and in 100 healthy children and adults of Han nationality as control. A statistical analysis of the correlation between glycine (Gly)16 allele, Gly16/glutamine (Gln)27 haplotype and asthmatic clinical status was carried out. Results: There was no significant increase of the frequency of Gly16 and Gln27 allele in the asthmatic group as compared with the control group (P＞0.05). There was a significant increase of the frequency of Gly16 allele and Gly16/Gln27 haplotype in severe asthmatic cases than in the mild and moderate asthmatic ones (P＜0.01, 0.05). Conclusion: It is considered that asthma is not caused by Gly and Gln alleles ofβ2-AR polymorphisms. Glyl6 allele and Gly16/Gln27 haplotype are possibly correlated with the severity of the clinical manifestations in the children of Han nationality in Chongqing.     

Association of CALCA genetic polymorphism with essential hypertension

Background Calcitonin gene-related peptide （CGRP） is the predominant neurotransmitter in capsaicin-sensitive sensory nerves. Participation of CGRP in hypertension is one of the most extensively studied topics in the field. There is growing evidence to the effect that CGRP is associated with essential hypertension （EH）. The aims of this study were to pinpoint whether single nucleotide polymorphisms （SNPs） in the genes coding for CALCA were associated with EH susceptibility in a Hunan Han population. Methods A total of 293 subjects with EH and 208 controls were enrolled in the study. Genomic DNA was extracted from peripheral blood leucocytes by a phenol-chloroform method. The CALCA T-692C was genotyped using a restriction fragment length polymorphism method. Results A statistically significant difference in CALCA T-692C genotypic distribution was observed between cases and controls （P=0.001）. Moreover, the frequencies of the C allele were 14.85% in the EH group and 7.45% in the control group, prevalence of C alleles in EH subjects and controls was significantly incomparable （P 〈0.001）. Furthermore, the results of Logistic regression analysis showed that the carriers of C allele （TC＋CC genotypes） were associated with increased EH risk （OR=2.093, 95% CI： 1.317-3.326, P 〈0.01）. Conclusions CALCA genetic polymorphism is associated with EH susceptibility. Carriers of at least one C allele at the polymorphic site CALCA T-692C showed increased risk for EH.     

Impact of genetic variation of tumor necrosis factor-α on gestational hypertension

Background The mechanisms responsible for the pathogeneses of gestational hypertension and preeclampsia are unclear. Tumor necrosis factor-1α （TNF-1α） is a pro-inflammatory Th1-type cytokine. TNFA gene is located in the human leukocyte antigen （HLA） class Ⅲ region of the major histocompatibility complex （MHC） on chromosome 6. The high TNF-1α mRNA expression may be associated with the TNF2 （A） allele, which is the polymorphism of TNF-1α at position - 308 in promoter region. This study assessed whether the TNF2 （A） allele at position -308 plays a role in the alteration of blood pressure （BP） and urinary protein excretion during pregnancy. Methods The original prospective cohort study comprised 1623 pregnant women from January 2000 to October 2001. The G/A polymorphism was done by restriction fragment length polymorphism （RFLP） analysis with Nco I enzyme. Results The distributions of the G/A polymorphism of TNF-1α in the promoter region at position -308 were wild-type 72.4% and variant 27.6%, respectively. The frequency of TNF2 （A） allele was approximately 0.15 for Caucasian pregnant women in the study. It was not significantly different in the distributions of genotypes and G/A allele frequencies among the three groups of pregnant women with gestational hypertension, preexisting hypertension and normal blood pressure （P〉0.05）. The maternal blood pressure in the third trimester was significantly higher in the group of women possessing the TNF2 （A） allele compared to homozygous for the TNF1 （G） allele （systolic BE P〈0.01 and diastolic BE P〈0.05）. The elevated blood pressure in the TNF2 （A） group was accompanied by higher urinary protein excretion in the third trimester （P〈0.05）. The blood pressure and urinary protein excretion did not change apparently between the two groups in the first and second trimesters （P〉0.05）. Conclusions Maternal TNF2 （A） allele of TNF-1α promoter region at position -308 could play a role in the alteration of blood pressures and/or enhancement of urinary protein excretion during pregnancy, and might play an important role in the development of both gestational hypertension and preeclampsia.     

The V264M polymorphism of tissue factor pathway inhibitor gene in patients with acute coronary syndrome

Objective： To investigate V264M polymorphism of tissue factor pathway inhibitor （TFPI） in patients with acute coronary syndrome （ACS） in Chinese. Methods ： The genotypes of V264M were detected by polymerase chain reaction （PCR） and restriction fragment length polymorphism （PCR-RFLP） in 136 patients with ACS and 106 healthy controls with their plasmal f-TFPI tested by enzyme linked immunosorbent assay （ELISA）. Results： Two genotypes were found in V264M： GG and GA. The distribution frequencies of alleles and genotypes were in accordance with those predicted by Hardy Weinberg equilibrium in the present study （χ2 = 0.437, P 〉 0.05）. Plasma f-TFPI level was lower in A allele bearer than that in non-A allele carriers and higher in ACS than control subjects （P〈0.05）. No relationship was found between ACS and V264M polymorphism （P〉0.05）. Conclusion： The V264M polymorphism may have an impact on the plasma level of free TFPI（f-TFPI）, but it has no relationship with ACS.     

Association of IL33/ST2 Signal Pathway Gene Polymorphisms with Myocardial Infarction in a Chinese Han Population

This study investigated the relationship between IL-33/ST2 signal pathway gene polymorphisms and myocardial infarction(MI) in Han Chinese. A case-control association analysis was performed on a total of 490 MI patients(MI group) and 929 normal subjects(NC group). Sequenom Mass Array and Taqman genotyping technique were used to analyze the tag single nucleotide polymorphisms(SNPs) in the genes encoding IL-33, ST2, and IL-1Ra P(rs11792633, rs1041973 and rs4624606). The results showed that the frequencies of rs4624606 genotypes AA, TT, AT were 0.031, 0.647, 0.322 in MI group and 0.026, 0.712, 0.263 in NC group, and the allele frequencies of A and T were 0.192, 0.808 in MI group and 0.157, 0.843 in NC group. There were significant differences in rs4624606 genotypes and allele frequencies between MI group and NC group(P<0.05). For rs11792633, the allele frequencies of C and T were 0.45, 0.55 in MI group and 0.454, 0.546 in NC group with no significant differences found between the two groups. Compared with genotype CC+TC, rs11792633 genotype TT had an increased risk of hypertension(P<0.05). However, there were no significant differences in the frequencies of rs11792633 genotypes between the two groups. No significant differences were noted in the frequencies of rs1041973 genotype and allele between the two groups. Logistic regression analysis showed that rs4624606 genotypes AT and AA+AT were both significantly associated with MI(AT: OR=1.325, P=0.029, 95% CI=1.03–1.705; AA+AT: OR=1.316, P=0.028, 95% CI=1.03–1.681) after factors such as age, gender, smoking, drinking, body mass index(BMI), triglyceride(TG) and cholesterol were adjusted. Those carrying rs4624606 genotype AT or AA+AT had an increased risk of MI. No associations were found between the polymorphisms of the other two loci with MI. It was concluded that, in the IL33/ST2 signal pathway, the A allele of rs4624606 polymorphism of IL-1Ra P gene is a potential independent risk factor for MI, and the genotypes AA+AT and AT are associated with the incidence of MI.     

Beta2-adrenoceptor gene variant Arg16Gly is associated with idiopathic ventricular outflow-tract tachycardia

Background Imbalance of the sympathetic nervous system was involved in the pathogenesis of idiopathic ventricular outflow-tract tachycardia （IVOT）. We aimed to investigate whether the major genetic variants in β1-and β2-adrenoceptors and GNB3 C825T were associated with IVOT and verapamil sensitive idiopathic left ventricular tachycardia （ILVT）.Methods Patients with IVOT and ILVT from December 2005 to December 2007 were consecutively enrolled into this study. Controls were randomly selected from the community-based inhabitants. Five genetic variants, Ser49Gly and Gly389Arg in the β1-adrenoceptor, Arg16Gly and Gln27Glu in the β2-adrenoceptor and GNB3 C825T, were genotyped by polymerase chain reaction-restriction fragment length polymorphism analysis.Results A total of 227 patients with IVOT and 110 patients with ILVT were included. Genotyping revealed that the 16Gly allele of Arg16Gly variant of β2-adrenoceptor was associated with a higher risk of IVOT （OR：1.40, 95% CI： 1.12-1.75,P=0.003 in the addictive model and OR：. 1.62, 95% CI： 1.14-2.31, P=0.007 in the dominant model）. Patients with Gly16Gln27 haplotype also had a higher risk of IVOT （OR： 1.38, 95% CI： 1.11-1.73, P=0.012）. Other four variants,including Ser49Gly and Arg389Gly in β1-adrenoceptor, GIn27Glu in β2-adrenoceptor and GNB3 C825T, did not differ between patients with IVOT and controls. In patients with ILVT, no significant difference was found in these five variants compared with controls.Conclusions Arg16Gly in β2-adrenoceptor is significantly associated with IVOT in Chinese Han population. Major genetic variants in β1- and β2-adrenoceptor and GNB3 C825T may not be associated with ILVT. These data suggest a different arrhythmogenic mechanism in IVOT and ILVT.     

Thyroid Examination in Low-Radiation Exposed Iraqi Clean-up Workersmlmmunogenetic Study

Aim： Twenty nine Iraqi cleanup workers at A1-Tuwaitha Research site were examined for the prevalence of thyroid disorders. Materials and Methods： Serological evidence were carried out by measuring the levels of triiodothyronine （T3）, thyroxin （T4）, thyroid stimulating hormone （TSH） and anti-thyroglobulin （anti-Tg）, anti-thyroperoxidase （anti-TPO） auto antibodies. Genotyping for HLA-DRB1 and HLA-DQB1 alleles was done by using the molecular biological technique of polymerase chain reaction-sequence specific oligonucleotide （PCR-SSO）. Results： The hormonal study revealed that T4 and T3 levels were below the normal range in five and four workers respectively, TSH was below the normal range in two （7%） workers and elevated in the other three workers （10%）. Anti-TPO and anti-Tg antibodies were also determined. The results were positive in 24% and 17% of cleanup workers respectively. Comparison between 16 cleanup workers group A （risk-group）, 13 group B （exposed） and 30 （non exposed） control showed that HLA-DQBI＊06 allele was significantly P = radiation was most prominent in HLA-DQB 1＊03, P = 0.4 when age-dependent heterogeneity in response to low doses of radiation be involved in decreased thyroid disorder risk. 0.01 lower among group A than controls group. Risk elevation by compared with exposed control. Conclusion： Our data suggest an and the immunogenetic marker such as HLA- DQB 1＊06 allele may     

β2-ADRENERGIC RECEPTOR GENE POLYMORPHISM IN CHINESE NORTHERN ASTHMATICS

Objective To investigate whether the polymorphisms of β2-adrenergic receptor (β2-AR) at position 16, 27, 164 are associated with asthma in Northern Chinese subjects.Methods Genomic DNA was collected from unrelated Northern Chinese population of Han ethnicity, including 125 unrelated asthmatic individuals and 96 healthy controls. β2-AR genes at position 16, 27, 164 were amplified by using restriction fragment length polymorphism (RFLP) and allelic specific polymerase chain reaction methods. All asthmatics had their serum IgE (total and specific) antibody or skin-prick test measured, bronchial reactivity to methacholine (Mch) and bronchial reversibility by β2-agonist evaluated.Results (1) The frequency of Gly 16 homozygous was significantly higher in the asthmatic group than that in healthy controls (22.4% vs. 8.3%, P＜ 0.05), OR was 2.9 with 95% CI 1.26-6.78. The proportion of Gly 16 allele was also higher in asthmatics than that in control (0.46 vs. 0.36, P ＜ 0.05); Gly16 homozygous was not independently associated with asthma pathogenesis (P= 0.21, OR 0.42 with 95% CI 0.11-1.61). (2) Of 51 night attack patients, 18 carrying Gly16 homozygosity, if compared with 10 of 74 nonnocturnal asthmatics carrying this genotype, there was significant difference between these two groups (35.3% vs. 13.5%, P ＜ 0.01). (3) The average dose of PD20-Mch was significantly lower in patients carrying Gln 27homozygous than those carrying homozygous Glu 27 and Gln/Glu 27 heterozygous (0.2 0.3, 1.6 0.8, and 2.1 3.0 μ, mol/L,P ＜ 0.05).Conclusion β2-AR gene polymorphisms might confer susceptibility to asthma in Chinese Northern patients. β2-AR gene,coordinated with other candidate loci, plays a role in the development of asthma.     

β2肾上腺素受体多肽16位基因型与夜间哮喘表现型的关系

目的探讨β2肾上腺素受体(β2AR)16、27位基因多态性与夜间哮喘表现型的关系.方法以最大呼气流速(PEFR)为标准,将49例哮喘患者分为夜间哮喘组(25例)和非夜间哮喘组(24例).用PCR产物直接测序确定β2AR 16、27位基因型分布,以及分析两个位点各种基因型与两组病例PEFR、第一秒用力呼气量(FEV1)以及用药情况之间的关系.结果以PEFR为标准,夜间哮喘组PEFR在夜间平均下降33.6%,非夜间哮喘组下降7.0%,二者差异显著(P<0.001).夜间哮喘组和非夜间哮喘组(白天)基础FEV1分别为73.7 %和85.8 %,也具有显著性差异(P<0.001).Gly16的等位基因频率在夜间哮喘组56.0%明显较非夜间哮喘组22.9%高(P<0.05),Gly16集中分布于夜间哮喘组.27位点的多态性在两组间无显著性差异.结论β2 AR Gly16基因型与夜间哮喘可能有关系.     

β2肾上腺素受体基因多态性和支气管哮喘的关系

目的探讨β2肾上腺素受体(β2-adenergic receptor, β2AR)基因多态性与我国北方汉族支气管哮喘遗传易感性及与哮喘临床表型间的关系.方法采用聚合酶链反应(PCR)—限制性内切酶片段长度多态性(RFLP)和等位基因特异性PCR(ASP)检测16、27、164位β2AR基因多态性在125名哮喘患者和96名健康对照者间的分布;并测定哮喘患者血清的TIgE、肺通气功能(FEV1,FEV1%,FEV1/FVC)、支气管舒张试验、乙酰甲胆碱(Mch)气道激发试验(如果FEV1%>70%). 结果 Gly16纯合基因型在哮喘组的频率较健康对照组的频率明显升高(22.4% vs 8.3%,P<0.05),优势比(OR)为2.918(95%CI 1.256~6.781);等位基因Gly16的频率在哮喘组明显高于健康对照组(0.26 vs 0.16,P<0.05);Gly16纯合子在夜间哮喘患者的频率分布较非夜间哮喘患者明显增高(35.3% vs 13.5%,P<0.01);Gln27纯合子的个体较Glu27纯合子和Glu/Gln27的杂合子个体气道激发试验所用Mch剂量明显低[(0.205(0.275) vs β2.11(3.00) vs (1.575(0.828)(mol,P<0.05);16,27位β2AR基因型对哮喘患者的气道可逆性的改善、总IgE水平、肺功能的损害无影响.结论 Gly16/β2AR纯合基因型与我国北方汉族哮喘患者的遗传易感性有关,并与哮喘患者夜间症状加重明显有关,但不是哮喘发病的独立危险因素;Glu27/β2AR纯合基因型与哮喘患者气道高反应性有关.     

β2-ADRENERGIC RECEPTOR GENE POLYMORPHISM IN CHINESE NORTHERN ASTHMATICS

THEβ2-adrenergicreceptor(β2-AR)ishighlyexpre-ssedonairwaysmoothmusclecellsinlung,anddefectsinβ2-ARsignalpathwaywereinvolvedinthepathogenesisofasthma.1 Humanβ2-ARgeneisanintr-onlessgenewithacodingblockconsistingof1239nucleo-tidesonchromosome5q31-32,genome-widesearchforas-thmasusceptibilitylocishowedthatmarkersonthisregionhavebeenlinkedtoasthma-associatedphenotypesinvariousethnicpopulations.2 Reihsausetal3 firstdescribedninecod-ingregionpolymorphisms,particularly,thethreecommonaminoacidsu…     

Preliminary study on association of beta2-adrenergic receptor polymorphism with hypertension in hypertensive subjects attending Balok Health Centre, Kuantan

Polymorphisms within the beta2-adrenergic receptor (ADRB2) gene have been repeatedly linked to hypertension. Among the ADRB2 polymorphisms detected, Arg16Gly and Gln27Glu codons are considered the two most important variations. The amino acid substitution at these codons may lead to abnormal regulation of ADRB2 activity. The aim of the present study was to assess the association between ADRB2 polymorphisms and hypertension. This case-control study consisted of 100 unrelated subjects (50 hypertensive and 50 matched normal controls). Arg16Gly and the Gln27Glu polymorphisms were analyzed by polymerase chain reaction-restriction fragment length polymorphism assay. There were no significant evidence of association in allelic and genotypes distribution of Arg16Gly and Glu27Gln with blood pressure and hypertension. These findings suggest that the variation within codon 16 and 27 of ADRB2 gene were unlikely to confer genetic susceptibility for hypertension in our population samples.     

汉族国人β2肾上腺素受体遗传多态性与夜间哮喘的相关性研究

目的 :研究汉族国人中 β2 肾上腺素受体( β2 AR )遗传多态性与夜间哮喘的相关性。方法 :应用聚合酶链反应———等位基因特异性寡核苷酸杂交法 (PCR ASO)对夜间哮喘 2 5例 (NA组 )和非夜间哮喘 2 2例 (NNA组 )以及 72例健康人 (对照组 )的 β2 AR16和 2 7位的遗传多态性进行分析。所有受检者均为汉族国人。结果 :β2 AR 16位点Arg/Arg、Arg/Gly和Gly/Gly的基因型分布频率在NA组分别为 12 % ,16%和 72 % ;而在NNA组分别为 2 7%、41%和 3 2 %。与NNA组相比 ,NA组的基因型Gly/Gly频率和等位基因Gly频率明显增加 (P <0 0 1)。然而 ,NNA组与对照组的基因型Gly/Gly频率和等位基因Gly频率无显著差异 (P >0 0 5 )。β2 AR 2 7位点的基因型和等位基因型频率在三组间无显著差异 (P >0 0 5 )。结论 :β2 肾上腺素受体的Gly16多态性在夜间哮喘汉族国人中表达增强 ,与夜间哮喘具有相关性 ,可能为夜间哮喘这一表型的重要遗传因素     

血管紧张素Ⅱ受体1基因多态性与高血压合并心肌梗死发生的相关性

目的:探讨人血管紧张素Ⅱ受体1(AGTR1)A1166C多态性和高血压合并心肌梗死的关系.方法:采用聚合酶链反应-限制性片段长度多态性技术,检测并比较AGTR1多态性在健康体检成人(正常组,121名)、高血压病人(高血压组,105例)、高血压合并心肌梗死病人(合并组,95例)中的分布情况.结果:正常组、高血压组和合并组...     

老年高血压并抑郁症与儿茶酚胺氧位甲基转移酶基因多态性的相关性研究

目的 探讨儿茶酚胺氧位甲基转移酶(COMT)基因多态性与老年高血压并抑郁症发生之间的相关性.方法 选择2010年1月至2014年7月间在云南省昆明医科大学附属延安医院老年病科和云南省精神病院临床心理科住院的昆明汉族老年高血压并抑郁症患者(老年高血压并抑郁组)98例,同期选择昆明汉族老年高血压患者(老年高血压组)100例和老年健康人(老年对照组)100例作为研究对象,应用聚合酶链反应-限制性内切酶片段长度多态性(PCR-RFLP)法检测COMT基因1947位点的多态性分布频率并进行分析.结果 与老年对照组比较,老年高血压并抑郁症组COMT 1947位点AA、AG基因型频率(28.57％、51.02％)明显高于老年对照组(19.00％、39.00％,P＜0.01).老年高血压并抑郁症组携带A等位基因的频率(54.08％)较老年对照组高(38.50％,P＜0.01).携带A等位基因人群发生高血压并抑郁症的风险是G等位基因的1.881倍(OR=1.881,95％CI:1.261～2.807,P＜0.01);老年高血压组与老年高血压并抑郁症组各基因型频率比较差异无统计学意义(P＞0.05).但两组间A与G等位基因频率比较差异有统计学意义(P＜0.05).高血压并抑郁组携带A等位基因的频率(54.08％)较老年高血压组(42.50％)高,且携带A等位基因人群发生抑郁症的风险是G等位基因的1.593倍(OR=1.593,95％ CI:1.071～2.37,P＜0.01).结论 COMT基因多态性可能与老年高血压并抑郁症的发生相关,检测老年高血压患者COMT基因1947位点基因型,可以作为预测抑郁症发生的一项重要指标.     

碱基切除修复基因多态与氯乙烯致染色体损伤的易感性

目的探讨碱基切除修复基因胸腺嘧啶DNA糖苷酶(TDG)、腺苷酸二磷酸核糖转移酶(ADPRT)和脱嘌呤/脱嘧啶核酸内切酶(APE1)基因多态与氯乙烯职业接触致外周血淋巴细胞染色体损伤易感性的关系。方法采用胞质分裂阻滞微核试验方法评价185名氯乙烯接触工人染色体损伤水平,应用创造酶切位点的限制性片段长度多态检测技术检测ADPRTVal762Ala和TDGGly199Ser基因位点的多态性,应用PCR-RFLP技术检测APE1Ile64Val基因多态位点。结果多因素Poisson回归分析结果表明,携带TDG199Gly/Ser Ser/Ser基因型的氯乙烯接触工人发生染色体损伤的风险是携带TDG199Gly/Gly基因型工人的1.198倍(95%CI为1.026～1.397),女性发生染色体损伤的危险度是男性的1.172倍(95%CI为1.004～1.366),36岁及以上年龄组人群发生染色体损伤的危险度是36岁以下年龄组人群的1.316倍(95%CI为1.130～1.531)。ADPRTVal762Ala和APE1Ile64Val基因多态与氯乙烯致染色体损伤易感性无关。结论氯乙烯职业接触人群中,TDG199Gly/Ser Ser/Ser基因型携带者发生染色体损伤的风险增高。     

金属硫蛋白基因G-201A多态性在2型糖尿病及原发性高血压的分布差异性

［摘要］目的　探讨金属硫蛋白（metallotionein,MT）基因家族中的MT4基因 G-201A位点单核苷酸多态性（SNPs）在2型糖尿病及原发性高血压的分布差异性．方法　选取2型糖尿病患者324例,原发性高血压患者301例,正常对照者301例．应用聚合酶链反应-限制性片段长度多态性（PCR-RFLP）技术检测MT4基因 G-201A位点的基因多态性． 结果 （1）2型糖尿病324例、原发性高血压301例、正常对照者301例中MT4 G-201A基因型GG、GA、AA的频率分别为39.5%、46.6%、13.9%;42.2%、48.5%、9.3%;42.5%、51.5%、6.0%;基因型分布均符合Hardy-Weinberg平衡（P＞0.05）;（2）MT4 G-201A多态性:3组间基因型及等位基因（G和A）频率分布差异有统计学意义（P＜0.05）;原发性高血压组和正常组比较分布差异无统计学意义（P＞0.05）;2型糖尿病组和正常组比较分布均差异有统计学意义（P＜0.05）;原发性高血压组与2型糖尿病组比较,基因型及等位基因均差异无统计学意义（P＞0.05）;（3）男性MT4G-201A多态性:3组间基因型及等位基因频率分布差异有统计学意义（P＜0.05）;原发性高血压组与2型糖尿病组比较,基因型及等位基因均无统计学意义;女性MT4 G-201A多态性:3组间基因型及等位基因频率分布,有统计学意义（P＜0.05）,2型糖尿病组和正常对照组比较分布均有统计学意义（P＜0.05）;原发性高血压组与2型糖尿病组比较,等位基因频率无统计学意义（P＞0.05）．结论 （1）MT基因G-210A多态性与2型糖尿病相关,与原发性高血压无相关性;（2）女性2型糖尿病MT基因G-210A多态性基因型分布与正常不同,但与高血压无异;男性则无此差异.     

PPARγ C161→T、α-内收蛋白Gly460Trp基因多态性与原发性高血压的关系

目的探讨过氧化物酶体增殖物活化受体γ(PPARμ)C161→T及α-内收蛋白Gly460Trp基因多态性与原发性高血压(EH)的关系。方法原发性高血压患者(高血压组)262例与正常人群270例(健康对照组)为研究对象,应用聚合酶链反应—限制性片段长度多态性方法对PPARμ基因及α-内收蛋白Gly460Trp基因多态性位点进行分析,统计2种基因多态性频率并进行比较。结果高血压组PPARμC161→T基因型分布情况为TT型10例(3.82%),TC型70例(26.72%),CC型182例(69.46%),T型等位基因为90例次(17.18%),C型等位基区为434例次(82.82%);健康对照组PPAR_γC161→T基因型分布情况为TT型17例(6.30%),TC型119例(44.07%),CC型134例(49.63%),T型等位基因为153例次(28.33%),C型等位基因为387例次(71.67%),2组间分布比较差异有统计学意义(P<0.05)。高血压组α-内收蛋白Gly460Trp基因型分布情况为GlyGly型57例(21.76%),GlyTrp型为129例(49.23%),TrpTrp型为76例(29.01%),Gly型等位基因为243例次(46.37%),Trp型等位基因为281例次(53.63%);健康对照组α-内收蛋白Gly460Trp基因型分布情况为GlyGly型63例(23.33%),GlyTrp型为124例(45.93%),TrpTrp型为83例(30.74%),Gly型等位基因为250例次(46.30%),Trp型等位基因为290例次(53.70%),2组间分布比较差异无统计学意义(P>0.05)。结论中国人群中PPARγC161→T基因多态性与原发性高血压病相关;α-内收蛋白Gly460Trp基因多态性与原发性高血压无相关性。