β-FIBRINOGEN PROMOTER-455 G/A (HaeⅢ) POLYMORPHISM PREDICTION OF PLASMA FIBRINOGEN BUT NOT OF ISCHEMIC CEREBROVASCULAR DISEASE

Objective The-455 G/A (HaeⅢ) polymorphism of β-fibrinogen gene influences levels of plasma fibrinogen. We further investigated whether it influences the risk of ischemic cerebrovascular disease. Methods We accumulated 134 acute ischemic cerebrovascular disease (ICVD) cases and compared their -455 G/A status with a control group (n = 166). The β-fibrinogen gene -455 G/A polymorphism was analyzed for all subjects by PCR-RFLP with the restrictive enzyme HaeⅢ. Results Plasma fibrinogen was higher in AA homozygous participants (341 mg/dL) than in participants carrying the G allele: GA (290 mg/dL), GG (298 mg/dL) in the control group. Plasma fibrinogen was also higher in AA homozygous patients (353 mg/dL) than in cases carrying the G allele: GA (287mg/dL), GG (302 mg/dL) in the ICVD group. However, there was no significant association between β-fibrinogen gene -455 G/A polymorphism and ICVD group. Conclusions Although a small effect cannot be excluded, β-fibrinogen gene -455 G/A polymorphism is an independent predictor of plasma fibrinogen, but not of ischemic cerebrovascular disease.     

A Meta-analysis of β-fibrinogen Gene-455G/A Polymorphism and Plasma Fibrinogen Level in Chinese Cerebral Infarction Patients

Objective To evaluate the correlation between the β-fibrinogen gene-455G/A polymorphism and cerebral infarction in Chinese population by means of meta-analysis. Methods Genetic association studies on evaluating the β-fibrinogen gene -455G/A polymorphism and cerebral infarction involving Chinese population published before December 2005 were collected from database of PubMed, EMBASE, and CNKI. All the data in literature were abstracted based on the defined selection criteria by two independent investigators. Publication bias was tested by funnel plot and the odd ratios of all studies were combined dependent on the result of heterogeneity test among the individual studies. The software Review Manager (Version 4.2) was used for meta-analysis. Results Eleven studies including 1405 patients and 1600 controls met the selection criteria. There was no publication bias in 11 reviewed studies. Heterogeneity test of reviewed studies showed statistically significant differences (χ2=24.58, P=0.006) among the ORs of individual studies. The combined OR of 11 studies of susceptibility to cerebral infarction in –455A allele carriers compared with the -455G/G wild homozygotes was 1.33 (95%CI 1.04-1.71, P=0.02). In the patients with cerebral infarction in 6 studies, the summarized average plasma fibrinogen level of allele A carrier was 0.29 g/L (95%CI 0.14-0.44, P=0.0002) higher than that of -455G/G homozygous ones. Conclusions β-fibrinogen gene -455G/A polymorphism might contribute to susceptibility of cerebral infarction in Chinese population; allele A increases the individual susceptibility to the disease.     

A meta-analysis of relationship between β-fibrinogen gene -148C/T polymorphism and susceptibility to cerebral infarction in Han Chinese

Objective The results of studies on association between -148C/T polymorphism in promoter region of β-fibrinogen gene and susceptibility to cerebral infarction in Chinese population are controversial. In this study, we summarize the results of published works in this field by a meta-analysis. Data sources Genetic association studies evaluating the β-fibrinogen gene -148C/T polymorphisms and cerebral infarction involving Chinese population published before December 2005 were collected from PubMed, EMBASE and CNKI. Study selection Case control studies involving unrelated, Han subjects aged from 18 to 80 years, and the internationally recognized diagnostic standard of cerebral infarction and genotype frequencies in control group consistent with Hardy-Weinberg equilibrium were used. Publication bias was tested by funnel plot and the odds ratios of all studies were combined dependent on the result of heterogeneity test among the individual studies. The software Review Manager (Version 4.2) was used for meta-analysis. Results Eleven studies including 1223 patients and 1433 controls met the selection criteria. There was no heterogeneity among the odds ratios (ORs) of individual studies (χ(2)=17.82, P=0.06). The combined OR of susceptibility to cerebral infarction in -148T allele carriers compared to the wild homozygote was 1.32 (95%CI 1.12 to 1.55, P=0.0008). In the patients with cerebral infarction, the average plasma fibrinogen level of allele T carrier was 0.42 g/L (95%CI 0.29 to 0.54, P<0.001), higher than that of -148C/C homozygous ones. Conclusions β-fibrinogen gene -148C/T polymorphism might contribute to susceptibility to cerebral infarction in Han Chinese. To reach a definitive conclusion, further gene to gene and gene to environment interactions studies on β-fibrinogen polymorphisms and cerebral infarction with large sample size are required.     

Association of RFC-1 80A→G and MTHFR 677C→T polymorphisms with neural tube defects in Ukrainian population

【Objective】To evaluate the roles of 80A→G polymorphism of RFC-1 gene encoding the reduced folate carrier protein and 677C→T polymorphism of 5,10-methylenetetrahydrofolate reductase gene(MTHFR)in neural tube defects(NTD)risk in Ukrainian population.【Methods】The folate status,homocysteine levels and genotypes were assessed in 42 mothers of fetuses with spina bifida,anencephaly and encephalocele with the age of 19-40 years.Serum folate and plasma homocysteine levels were estimated using chemiluminescence technology.DNA was isolated from peripheral leukocytes obtained from blood using standard procedures.The presence of the RFC-1 80A→G polymorphism was investigated using polymerase chain reaction(PCR).Real time PCR was used to detect the presence of the 677C→T mutation in the MTHFR gene.【Results】Genotype frequencies for RFC-1 80A→G in NTD group were:homozygous wild type in 9(21.4%),heterozygous type in16(38.1%)women;17(40.5%)women surveyed were found homozygous for the mutant allele genotype of RFC-1(GG).Homozygous for the indicated mutation was found in 57.1%of women with fetal anencephaly in the past history and 29.6%of women with spina bifida fetuses.Allelic frequency in this group of women for allele A was 40.5%(34),for allele G was 59.5%(50).Among women with 80A/A genotype of RFC-1 gene reduced levels of serum folic acid were noticed only in 6(35.5%),but hyperhomocysteinemia was found in 10(58.8%)women.【Conclusion】80G→A polymorphism of RFC-1 gene is a potential genetic factor in the formation of fetus NTD in women of South Ukraine.     

The Association between Polymorphism of TNF-α Gene and Hypertensive Disorder Complicating Pregnancy

To study whether the development of hypertensive disorder complicating pregnancy is associated with -308G→A, -850C→T mutation at promoter of TNF-α gene, the -308G→A, -850C→T polymorphism was examined in patients and healthy pregnant women by PCR-RFLP technique. The frequencies of genotype and allele were compared between the two groups. The re- sults showed that with -308G→A polymorphism distribution, the allele frequency of TNF2 and the frequency of the genotype TNF2/1 in the patient group was significantly higher in the patient group than in control group (P<0.05). A significant difference in genotype distribution of -850C→T poly- morphism was observed between the two groups. The allele frequencies of T in patient group was higher in the control group as compared with the patient group. The frequencies of CT and TT genotypes were lower in the patient group. It is concluded that the TNF2 allele of -308 is associated with the occurrence of hypertensive disorder complicating pregnancy, while T allele of -850 may be the protective factor against the development of the disease. TNF2/1 CC may be susceptibility genotype of hypertensive disorder complicating pregnancy.     

Effects of single nucleotide polymorphisms 869 T/C and 915 G/C in the exon 1 locus of transforming growth factor-β1 gene on chronic obstructive pulmonary disease susceptibility in Chinese

Background The main risk factor for chronic obstructive pulmonary disease （COPD） is cigarette smoking. However, only 10%-20% of chronic heavy smokers develop systematic COPD. We hypothesized that the inheritance of gene polymorphisms could influence the development of COPD, which was investigated by studying two single nucleotide polymorphisms （SNP） in exon 1 of the transforming growth factor-β1 （TGF-β1） gene. Methods We enrolled 219 patients with COPD as the research group and 148 healthy people as the control group, all of whom were Chinese Han people. The polymorphisms of the TGF-β1 gene, 869T/C and 915G/C, were analyzed using the method of amplification refractory mutation system-polymerase chain reaction （ARMS-PCR）. Results The occurrence of the TGF-β1 gene 869T/C polymorphism in patients with COPD was significantly different from the control group （P 〈0.05）, in which the relative risk of this disease increased in cases who had the C allele （OR： 1.131, 95% CI： 1.101-1.539）. There was no increased frequency of TGF-β1 915G/C gene in COPD patients compared with control subjects （P 〉0.05）. Conclusions The polymorphism 869T/C in TGF-β1 gene has a significant association with disease occurrence in COPD patients and the C allele might be a risk factor. The homozygous wild-type CC of 869T/C on TGFβ1 could be a predisposing factor in COPD and those who carry the C allele might have particularly susceptibility to developing COPD.     

Relationship between polymorphism of cystathionine beta synthase gene and congenital heart disease in Chinese nuclear families

Objective To study the relationship between polymorphism of cystathionine beta synthase （CBS） gene and development of congenital heart disease （CHD）. Methods One hundred and twenty-seven CHD case-parent triads were recruited from Liaoning Province as patient group, and 129 healthy subjects without family history of birth defect were simultaneously recruited as control group together with their biological parents. For all subjects the polymorphism of CBS gene G919A locus was examined by PCR-ARMS method, Results The frequencies of three genotypes （w/w, w/m, and m/m） in control group were 27.2%, 58,4%, and 14.4%, respectively, with no significant difference in gender. A significant difference in the allele frequency was found between CHD patients and controls, the wild allele frequency was 67,9% in patients and 55.7% in controls CHD parents＇ genotype distribution was significantly different from that in controls. Further comparison of each type of CHD showed that genotype frequencies in several CHD subtypes were significantly different from those in their corresponding controls. The results of TDT analysis showed that no allele transmission disequilibrium existed in CHD nuclear families. Conclusions CBS gene G919A mutation is associated with the development of CHD, and the mutated allele may decrease the risk of CHD.     

POLYMORPHISM OF ANGIOTENSIN I TYPE 1 RECEPTOR GENE IN ELDERLY PATIENTS WITH ESSENTIAL HYPERTENSION

Objective To detect the A/C1165 polymorphism of angiotensin Ⅱ type Ⅰ receptor (AT1-R)gene in essential hypertensive elderly. Methods The A/C1166 polymorphism of AT1-R gene was assessed by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) in a case-control study of 87 essential hypertensive elders (EH) and 55 normolensive elders (NT). Results The genotype frequencies of AA, AC, CC were 0 .805 , 0.161, 0 .034 in EH group and 0 .927 ,0 .073 ,0 .000 in NT group respectively. The frequency of C61166 allele was higher in EH group (0.115) than in NT group (0 .036 )(P<0 .05 ). Conclusion The resultsindicate that A/C1166 polymorphism of AT1-R gene may be associated with essential hypertension in elderly.     

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.     

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.     

β-fibrinogen gene -455A/Gpolymorphism and plasma fibrinogen level in Chinese stroke patients

目的　初步探讨β 纤维蛋白原基因启动子区 4 5 5A/G多态性和血浆纤维蛋白原水平的关系以及在缺血性脑血管病中的意义。方法　 91例脑梗死患者 (6 3 5± 10 1岁 )、74例无血栓老年对照组 (6 0 6± 10 8岁 )和 98例年轻对照组 (健康献血员 ) (37 5± 13 3岁 )。PCR RFLP (HaeⅢ )法分析 β 纤维蛋白原基因启动子区 4 5 5A/G多态性 ;血浆纤维蛋白原水平测定使用PT时间法。计量资料间比较使用t检验 ,由于纤维蛋白原浓度呈非正态分布 ,故检验前作对数转化 ;计数资料使用卡方检验。结果　H2等位基因频率在男性脑梗死组明显较老年对照组高 (2 2 7%和 7 1%,χ2 =5 5 6 ,P <0 0 2 ) ,在女性组中无统计学差异 ;在无血栓的所有人群中 (包括老年对照组和年轻对照组 ) ,H2等位基因频率随年龄增长的分布频率是 :≤ 4 0岁 ,2 1 3%;4 1- 5 9岁 ,15 4 %;≥ 6 0岁 ,10 2 %;男性老年和年轻对照组中 ,H1H1基因型人群血浆纤维蛋白原水平 (2 87± 96和 2 34± 5 8mg/dl)明显较H1H2 H2H2型 (331± 4 4和 30 7± 5 5mg/dl;t =2 5 3和 9 6 7,P <0 0 5 )低。在女性对照组中尚未发现同样现象。结论　男性人群血浆纤维蛋白原水平受β 纤维蛋白原基因启动子区 4 5 5A/G多态性的影响 ,H2等位基因可能     

急性脑梗死患者β纤维蛋白原—455G／A基因多态性和血浆纤维蛋？…

目的 探讨β－纤维蛋白原基因启动子区－４５５Ａ／Ｇ多态性和血浆纤维蛋白原水平的关系以及在缺血性及脑血管病中的作用。方法 应用ＰＣＲ－ＲＦＬＰ（ＨａｅⅢ）方法对９１例脑梗死患者、７４例选择性无血栓患者和９８例年轻健康献血员进行β－纤维蛋白质基因启动子区－４５５Ａ／Ｇ多态性分析;血浆纤维蛋白原水平测定使用凝血酶原时间法。计算资料间比较使用ｔ检验,但由于纤维蛋白原浓度呈患者明显较无血栓对照组高（２２．７     

脑出血患者抵抗素基因+299G>A位点多态性分析

目的揭示浙江地区汉族脑出血患者抵抗素基因+299G>A位点单核苷酸多态性与血浆抵抗素及C-反应蛋白水平的相关性。方法选取344例高血压性基核出血患者和344例年龄及性别均配对的健康体检者,入院时或体检时抽取外周血提取DNA,采用聚合酶链反应-限制性片段多态性分析基因型,同时采用ELISA法检测脑出血患者血浆抵抗素及C-反应蛋白浓度,统计分析其相关性。结果酶切后可见抵抗素基因+299G>A位点有GG、GA和AA 3种基因型。健康体检者等位基因G和A的频率分别为64.8%和35.2%,基因型GG、GA和AA的频率依次为41.9%、45.9%和12.2%。脑出血患者等位基因G和A的频率分别为69.3%和30.7%,基因型GG、GA和AA的频率依次为为49.1%、40.4%和10.5%。经Hardy-Weinberg遗传平衡定律检验,脑出血患者及健康体检者各基因型频率均符合遗传平衡。经卡方检验,脑出血患者及健康体检者各基因型差异无统计学意义(P=0.159)。GG、GA和AA基因型脑出血患者血浆抵抗素浓度依次为(23.9±7.2)ng/ml、(26.4±7.2)ng/ml和(26.9±9.7)ng/ml,血浆C-反应蛋白浓度依次为(7.5±2.2)mg/L、(8.3±2.7)mg/L和(8.4±3.0)mg/L。采用方差检验,GG基因型患者血浆抵抗素和C-反应蛋白浓度均显著低于GA和AA基因型患者(P均<0.05),而GA和AA基因型患者血浆抵抗素和C-反应蛋白浓度差异无统计学意义(P均>0.05)。采用多元线性回归分析,脑出血患者入院时血浆抵抗素浓度与C-反应蛋白浓度显著正相关(t=7.032,P<0.001)。结论浙江地区汉族脑出血患者抵抗素基因+299G>A位点单核苷酸多态性与血浆抵抗素和C-反应蛋白浓度显著相关,可能参与脑出血炎症反应。     

脑出血患者抵抗素基因+299G>A位点多态性与血浆抵抗素浓度的相关分析

目的探讨浙江地区脑出血患者抵抗素基因+299G>A位点单核苷酸多态性与血浆抵抗素水平的相关性。方法选取344例高血压性基底节出血患者,入院时抽取外周血提取DNA,采用聚合酶反应-限制性片断多态性分析基因型,同时采用ELISA法检测血浆抵抗素浓度,并分析其相关性。结果酶切后可见抵抗素基因+299G>A位点有GG、GA和AA三种基因型。脑出血患者等位基因G和A的频率分别为69.3%和30.7%,基因型GG、GA和AA的频率依次为为49.1%、40.4%和10.5%。脑出血患者各基因型频率符合遗传平衡。GG、GA和AA基因型脑出血患者血浆抵抗素浓度依次为(23.9±7.2)ng/ml、(26.4±7.2)ng/ml和(26.9±9.7)ng/ml。GG基因型患者血浆抵抗素浓度显著低于GA和AA基因型患者(均<0.05),而GA和AA基因型患者血浆抵抗素浓度差异无统计学意义(>0.05)。结论浙江地区脑出血患者抵抗素基因+299G>A位点单核苷酸多态性与血浆抵抗素浓度显著相关,可能参与脑出血炎症反应。     

IL-10启动子区-1082基因多态性与脓毒血症易感性的关系研究

目的分析脓毒血症患者IL-10的启动子区域转录起始位点上游第1082位点的多态性,探讨其与脓毒血症易感性之间的关系。方法采用聚合酶链反应-限制性片段多态性(PCR-RELP)检测IL-10基因-1082位点多态性,SPSS17.0分析各位点的基因型分布和等位基因频率。结果 IL-10-1082位点的多态性在脓毒血症组(AA:58.16%、GA:39.80%、GG:2.04%)与对照组(AA:73.75%、GA:26.25%)的基因频率有显著性差异(P0.05)。脓毒血症组中GA基因型的频率显著高于对照组(P=0.038),脓毒血症组中G等位基因的频率显著高于对照组(P=0.015)。结论 IL-10-1082 GA基因型携带者比AA基因型患者的脓毒血症风险性高,IL-10-1082的G等位基因比A等位基因患脓毒血症的风险性高。     

唐山地区汉族妇女IL-10-1082基因多态性与HPV16、18相关性宫颈癌的研究

目的探讨唐山地区IL-10基因启动子区-1082G/A多态性与汉族妇女HPV感染宫颈癌发生的相关性。方法应用PCR、ARMS-PCR技术对103例宫颈癌病例组和115例年龄匹配的正常对照组宫颈组织HR-HPV16、18DNA感染和IL-10基因启动子区域-1082多态性检测分析。结果 -1082G/A多态性GG、GA、AA基因型频率在HPV16阳性和HPV16阴性组中频率分别为:0、9.1%、90.9%和3.9%、19.2%、76.9%,差异无统计学意义(P>0.05);等位基因G和A在HPV16阳性和HPV16阴性组的频率分别为:4.5%、95.5%和13.5%、86.5%,其差异有统计学意义(P=0.049);IL-10基因启动子区-1082G/A多态性GG、GA、AA基因型频率在HPV18阳性和HPV18阴性组中分布分别为:0、21.1%、78.9%和1.2%、9.5%、89.3%,差异无统计学意义(P>0.05);等位基因G和A在HPV18阳性和HPV18阴性组的频率分别为:10.5%、89.5%和6.0%、94%,差异亦无统计学意义(P>0.05)。结论唐山地区汉族妇女IL-10基因启动子区-1082G/A多态性可能与高危型HPV16感染导致的宫颈癌有关。     

药物性肝病患者髓过氧化物酶基因多态性分析

目的：探讨髓过氧化物酶(MPO)基因多态性与药物性肝病(DILI)之间的关系。方法病例采用对照分析的方法,方便收集37例药物性肝病患者和30例健康对照者外周血标本,提取DNA进行MPO-463G/A多态性检测。结果MP0-463 GG、GA和AA 3种基因型的频率在DILI组中分别为86.5％、10.8％和2.7％,在对照组中分别为73.4％、23.3％和3.3％;将携带MP0-463 GA和AA型者合并后与携带MPO-463 GG型相比较,患DILI的风险显著增高,相对于G等位基因,携带A等位基因的个体患DILI的风险显著降低,说明MP0-463 G/A多态性与DILI的发生有关。结论髓过氧化物酶基因多态性与药物性肝病易感性之间存在相关性,值得进一步研究。     

纤维蛋白原Bβ-455G／A、-854G／A基因多态性与其含量及分子活性的相关性研究

目的探讨血浆纤维蛋白原（Fbg）Bβ-455G／A、-854G／A基因型的分布特征及其基因多态性联合多种生理和环境因素对Fbg浓度和分子活性的影响。方法采用整体抽样的方法选取开滦集团职工1555人,样本均清晨空腹抽取静脉血测定血糖等12项生化指标;应用聚合酶链反应-限制性酶切法进行两位点的基因多态性分析;采用微机辅助血浆Fbg功能自动监测系统测定血浆Fbg浓度和Fbg单体聚合反应速率（FMPV）、最大光密度（Amax）、FMPV／Amax等反映Fbg分子聚合功能参数;并进行体检和问卷调查。结果Bβ—455等位基因G、A频率分布为0．798、0．202,Bβ-854等位基因G．A频率为0．899、0．101。两位点基因连锁不平衡分析为随机分布,两位点等位基因及基因型频率分布与性别无关（P〉0．05）;而高血压病组Bβ—455等位基因G、野生基因型频率均高于无高血压病组（P〈0．05）;B13—455各基因型组间Fbg浓度及分子活性指标均无差异性（P〉0．05）,Bβ—854GA＋AA组Fbg浓度、FMPV／Amax、FMPV及Amax均明显高于GG组（P〈0．01）。结论Bβ—455等位基因G和GG基因型与高血压病有关,但对Fbg浓度和分子活性无明显影响;Bβ-854的变异基因型可以明显影响血浆Fbg浓度和分子聚集活性,但可以通过改变某些生理和环境因素增强或减弱其影响的程度。     

CXCL12基因多态性与肿瘤易感性关联的Meta分析

目的运用Meta分析方法综合评价CXCL12 rs1801157基因多态性与肿瘤发病的关系。方法通过计算机检索和手工检索,收集有关CXCL12 rs1801157基因多态性与肿瘤易感性关系的文献,筛选出符合条件的文献,运用Meta分析方法对各项研究进行异质性检验后计算合并OR值及其95%可信区间,并进行敏感性分析及发表偏倚的评估。结果 15篇符合条件的文献纳入本研究,累积病例组3 225例,对照组4 001例。Meta分析合并结果显示突变等位基因A携带者相比野生等位基因G携带者肿瘤发病风险显著提高,合并值OR=1.27 95%CI=1.12～1.43,差异有统计学意义(P<0.01);基因型AA∶GG,GA∶GG和(AA+GA)∶GG合并OR值及其95%可信区间分别是1.30,95%CI=1.05～1.61、1.45,95%CI=1.22～1.72和1.43,95%CI=1.21～1.68,差异均有统计学意义。按肿瘤类型进行分层,A等位基因携带者相比G等位基因携带者显著提高乳腺癌发病(OR=1.32,95%CI=1.15～1.51,P<0.01);AA∶GG,GA∶GG和(AA+GA)∶GG合并OR值及其95%可信区间分别是1.64,95%CI=1.16～2.33、1.42,95%CI=1.18～1.70和1.44,95%CI=1.21～1.72。结论 CXCL12 rs1801157基因多态性与肿瘤易感性有关,突变等位基因A与肿瘤易感性升高有关,基因型AA或基因型GA携带者相对基因型GG携带者肿瘤发病风险提高。突变等位基因A增加乳腺癌易感性。