Gender-specific association between polymorphism of vascular endothelial growth factor (VEGF 936C>T) gene and patients with stomach cancer

Purpose

Angiogenesis plays an important role in the growth, progression, and metastasis of tumors. Vascular endothelial growth factor (VEGF) overexpression has been associated with advanced stage and poor survival in several cancers. We investigated the present case-control study to determine whether there is an association between the VEGF 936C > T polymorphism and stomach cancer.

Patients and Methods

The association of functional single nucleotide polymorphisms (SNPs) of the VEGF gene with stomach cancer development was evaluated in a case-control study of 154 Korean stomach cancer patients. Genotypes were determined by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis.

Results

Our results revealed significant association of T allele-bearing genotypes with increased risk for stomach cancer development. Genotype frequencies of the VEGF 936C > T polymorphisms were significantly different between patient and control groups (CT, AOR: 2.007, 95% CI: 1.277 - 3.156, TT, AOR: 4.790, 95% CI: 1.174 - 19.539, CT + TT, AOR: 2.147, 95% CI: 1.382 - 3.337). When stratified by gender and age, genotype frequencies were significantly different for stomach cancer in women and in patients younger than 55 years (in women, CT, OR: 3.049, 95% CI: 1.568 - 5.930, CT+TT, OR: 3.132, 95% CI: 1.638 - 5.990; in < 55 years, CT, OR: 3.306, 95% CI: 1.413 - 7.732, CT + TT, OR: 3.967, 95% CI: 1.729 - 9.104). In addition, this association partially remained in cases with intestinal and diffuse-type stomach cancer.

Conclusion

Our present study suggests that the VEGF 936C > T polymorphism is a susceptibility factor for stomach cancer, at least in Korean.     

凝血因子Ⅴ和Ⅶ基因多态性与冠心病的初步研究

目的　观察凝血因子 (coagulation factor ,F )、 (coagulation factor ,F )基因多态性在中国汉族人群中的分布及其与冠心病 (coronary heartdisease,CHD)的关系。方法　应用聚合酶链反应和限制性内切酶片段长度多态性技术检测了 2 34例 CHD患者和 2 10名正常对照者的 F 、F 基因型 ,结合选择性冠状动脉造影结果探讨两者的关系。结果　 F 等位基因 R、Q和 H7、H6频率在冠心病组和对照组分别为 94 .6 %、5 .6 %、70 .3%、2 9.7%和 91.9%、8.1%、6 0 .9%、39.1%。基因型频率符合 Hardy-Weinberg平衡定律。R35 3Q和 HVR4基因型频率和等位基因频率在 CHD组和对照组 ,狭窄血管支数之间比较差异均无显著性。 R35 3Q基因型频率和等位基因频率在非心肌梗塞组和心肌梗塞组比较差异有显著性 (χ2 =4 .711,P<0 .0 5 ,OR=0 .37,95 % CI:0 .15～ 0 .94 ) ,而 HVR4基因多态在两组间比较差异无显著性(χ2 =0 .14 2 ,P>0 .0 5 )。冠心病组和对照组均没有发现 F L eiden突变。结论　F R35 3Q基因多态中的 Q等位基因可能是对抗心肌梗塞的保护因子     

炎症因子基因多态性与冠状动脉粥样硬化性心脏病的相关性

目的 研究中国南方汉族人群炎症因子基因多态性与冠状动脉粥样硬化性心脏病(简称冠心病)的相关性.方法 采用基质辅助激光解吸电离飞行时间质谱技术对283例经冠状动脉造影确诊的冠心病患者和176名对照者的5个炎症因子的基因多态性进行检测,评估不同基因型和等位基因与冠心病患病风险的关联性.结果 在受检测的5个炎症因子[乳腺癌易感基因1相关蛋白( BRCA1-associated protein,BRAP)、去整合素-金属蛋白酶8、中间a胰蛋白酶抑制因子H3、白细胞介素-15和环氧化酶-2]中,BRAP基因的270T/C及90A/G多态性在冠心病组与对照组间的差异有统计学意义,其等位基因和基因型的分布频率符合Hardy-Weinberg平衡(分别为:x2=0.878,P＞0.05;x2=0.776,P＞0.05).冠心病组BRAP 270C等位基因和90G等位基因频率高于对照组(分别为:29.51％vs.21.31％,P=0.006;30.04％ vs.21.31％,P=0.004).Logistic回归分析提示,BRAP 270CC和90GG基因型携带者患冠心病的发病风险高于BRAP 270TT和90AA基因型携带者(分别为:OR=4.51,95％CI:1.41～14.45,P=0.011;OR=5.09,95％CI:1.60～16.26,P=0.006),且该关联独立于性别、年龄、吸烟、高血压、糖尿病及血清总胆固醇、低密度脂蛋白胆固醇水平等风险因素之外.没有证据表明其余单核苷酸多态性与冠心病易感性相关.结论 BRAP基因内含子270T/C和外显子90A/G多态性可能是中国南方汉族人群冠心病发病的风险因素之一.     

VEGF基因多态性与子宫内膜异位症和子宫腺肌病遗传易感性研究

目的 探讨血管内皮生长因子(vascular endothelial growth factor,VEGF)基因启动子区-460C/T和-1154G/A单核苷酸多态性与子宫内膜异位症和子宫腺肌病发病风险的关系.方法 采用聚合酶链反应-限制性片段长度多态方法检测344例子宫内膜异位症患者(内异症组)和360名对照妇女(对照组)、174例子宫腺肌病患者(腺肌病组)和199名对照妇女(对照组)的VEGF基因2个多态性位点的基因型频率分布情况.结果 VEGF-460C/T多态的基因型和等位基因频率分布在两病例组与其对照组间差异均无统计学意义(P>0.05).在内异症组和对照组中,VEGF-1154G/A多态的AA、GA、GG 3种基因型频率分别是1.7%、28.8%、69.5%和5.8%、32.8%、61.4%,两组比较差异有统计学意义(P=0.006);G、A等位基因频率分别是83.9%、16.1%和77.8%、22.2%,两组比较差异有统计学意义(P=0.004);与GA+AA基因型相比,携带GG基因型明显增加内异症的发病风险(OR=1.43,95%CI:1.05～1.96).在腺肌病组和对照组中,VEGF-1154G/A多态的AA、GA、GG 3种基因型频率分别是2.9%、23.6%、73.6%和7.0%、34.2%、58.8%.两组比较差异有统计学意义(P=0.007);G、A等位基因频率分别是85.3%、14.7%和75.9%、24.1%,两组比较差异有统计学意义(P=0.001);与GA+AA基因型相比,携带GG基因型明显增加腺肌病的发病风险(OR=1.95,95%CI:1.26～3.03).结论 VEGF基因启动子区-1154G/A多态与子宫内膜异位症和子宫腺肌病的发病风险明显相关,携带GG基因型显著增加子宫内膜异位症和子宫腺肌病的发病风险.     

L-选择素基因多态性与冠状动脉粥样硬化性心脏病易感性的相关性研究

目的探讨L-选择素基因P213S多态性是否与冠状动脉粥样硬化性心脏病有关联。方法采用病例-对照研究，对212例经冠状动脉造影确诊的冠心病患者和230名正常对照者进行研究。应用聚合酶链反应限制性片段长度多态性（polymemse chain reaction-restriction fragment length polymorphism，PCRRFLP）技术测定L-选择素基因多态性。结果冠心病组213P等位基因频率明显高于对照组（77．59％vs69．35％，P=0．006）。PP纯合子患冠心病的风险是SS纯合子的2．70倍（95％CI：1．07～6．81），且经Logistic回归分析校正性别、年龄、体重指数、血清总胆固醇、甘油三酯、高密度脂蛋白-胆固醇和低密度脂蛋白-胆固醇等相关因素之后，差异仍具有统计学意义。根据冠状动脉造影结果进一步对冠心病患者进行分组后分析，发现L-广选择素基因P213S多态性与病变血管支数及疾病程度无相关性。结论L-广选择素213P等位基因可能与我国汉族人冠心病的易感性相关联。     

Vascular endothelial growth factor in children with cyanotic and acyanotic and congenital heart disease

Introduction

Vascular endothelial growth factor is a potent stimulator of angiogenesis. Children with cyanotic congenital heart disease often experience the development of widespread formation of collateral blood vessels, which may represent a form of abnormal angiogenesis resulting in increased morbidity and mortality. We undertook the present study to determine whether children with cyanotic congenital heart disease have elevated serum levels of vascular endothelial growth factor compared to children with acyanotic heart disease.

Material and methods

Serum was obtained from 35 children with cyanotic congenital heart disease and 30 children with acyanotic heart disease. Vascular endothelial growth factor levels were measured in the serum of these patients by sandwich enzyme immunoassay.

Results

Vascular endothelial growth factor was significantly elevated in children with cyanotic congenital heart disease compared to children with acyanotic heart disease (150.3 ±48.1 vs. 85.4 ±18.7 pg/ml, respectively, p < 0.001). In the cyanotic group, oxygen saturation (SaO₂) was negatively correlated with VEGF (r=–0.631, p < 0.001) while haemoglobin was positively correlated (r=0.781, p = 0.007). No significant correlations were found in the acyanotic group.

Conclusions

Children with cyanotic congenital heart disease have elevated systemic levels of vascular endothelial growth factor directly related to the degree of cyanosis (SaO₂ and haemoglobin levels). These findings suggest that the widespread formation of collateral vessels in these children may be mediated by vascular endothelial growth factor.     

细胞间黏附分子-1基因K469E多态性与冠心病关系的研究

目的：探讨细胞间黏附分子-1（ICAM-1）基因K469E多态性在冠心病及正常人群中的分布，初步分析其基因型及血清水平与冠心病的关系。方法：采用聚合酶链反应-限制性片段长度多态性（PCR—RFLP）技术和DNA序列测定法，检测了225例冠心病患者和230例对照者的ICAM-1基因K469E多态性，并用酶联免疫吸附试验检测了ICAM-1的血清水平。结果：冠心病组血清ICAM-1水平显著高于对照组（P〈0．01），ICAM-1基因型及等位基因的分布频率在冠心病组和对照组间比较差异具有显著性（P〈0．05），K等位基因携带者患冠心病的相对风险度是E等位基因的1．430倍（与对照组相比），而患心肌梗死的相对风险度是1．816倍（与心绞痛组相比）。结论：ICAM-1基因K469E多态性与冠心病的发生、发展及该疾病的严重程度密切相关，其中K等位基因可能是冠心病发病的遗传易感基因。     

Vascular endothelial growth factor gene polymorphisms and coronary heart disease: a systematic review and meta-analysis

We performed this study to better elucidate the relationship between vascular endothelial growth factor (VEGF) polymorphisms and coronary heart disease (CHD). Eligible articles were searched in PubMed, Medline, Embase, Scopus and CNKI. A total of 24 studies containing 6489 CHD patients and 5664 control subjects were analyzed. Our overall and subgroup analyses suggested that rs699947 polymorphism was significantly associated with CHD susceptibility in both Caucasians and Asians, rs1570360 polymorphism was significantly associated with CHD susceptibility in Caucasians, and rs3025039 polymorphism was significantly associated with CHD susceptibility in Asians. Besides, rs3025039 polymorphism was significantly correlated with the number of affected coronary arteries, while rs699947 and rs2010963 polymorphisms were significantly correlated with poor collateral circulation in CHD patients. Overall, our findings indicate that VEGF rs699947, rs1570360, and rs3025039 polymorphisms may affect CHD susceptibility. Moreover, VEGF rs699947 and rs2010963 polymorphisms may serve as genetic biomarkers of poor collateral circulation after myocardial ischemia.     

Association of the Vascular Endothelial Growth Factor Gene Polymorphisms (–460C/T, +405G/C and +936T/C) with Endometriosis: A Meta‐Analysis

Published data on the association between the vascular endothelial growth factor (VEGF) gene –460C/T (rs833061), +405G/C (rs2010963), +936T/C (rs3025039) polymorphisms and endometriosis risk are inconclusive. Eleven eligible case‐control studies including 2690 cases and 2803 controls were included in this meta‐analysis through searching the databases of PubMed and CBMdisc (up to August 1, 2011). In the overall analysis, no significant association between the –460C/T and +405G/C polymorphisms and risk of endometriosis was observed. However, significant associations were observed between endometriosis risk and VEGF+936T polymorphism with summarized odds ratio of 1.19 (95%CI, 1.02–1.37), 1.18 (95%CI, 1.03–1.37), 1.15 (95%CI, 1.01–1.30) for CT versus CC genotype, dominant mode (CT/TT vs. CC) and allele comparison (T vs. C), respectively. Furthermore, stratified analysis showed that significantly strong association between +936T/C polymorphism and endometriosis was present only in stage III–IV (OR = 1.32 for dominant mode; OR = 1.30 for T vs. C), but not in stage I–II. However, no significantly increased risk of endometriosis was found in any of the genetic models in Asians or in Caucasians. This meta‐analysis supports that VEGF+936T/C polymorphism is capable of causing endometriosis susceptibility.     

Single nucleotide polymorphisms in VEGF gene are associated with an increased risk of osteosarcoma

We aimed to assess whether the five common SNPs can affect the risk of osteosarcoma, and its association with demographic characteristics of osteosarcoma. 165 osteosarcoma patients and 330 cancer-free controls were enrolled into our study. Five common SNPs in VEGF gene, -2578C/A (rs699947), -1156G/A (rs1570360), +1612G/A (rs10434), +936C/T (rs3025039) and -634G/C (rs2010963), were detected by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). Conditional logistic regression analyses found that individuals with AA genotype and A allele of rs699947 were associated with an increased risk of osteosarcoma. Individuals with GG genotype and G allele of rs2010963 were associated with an increased risk of osteosarcoma. By stratified analysis, AA genotype of rs699947 was associated with an increased risk of osteosarcoma in those with shorter age, males and a family history of cancer, and GG genotype of rs2010963 was correlated with an increased risk of osteosarcoma in those with shorter age, females and a family history of cancer. Our study suggests that rs699947 and rs2010963 polymorphisms may play a role in the pathogenesis of osteosarcoma.     

冠心病的基因治疗

冠心病是严重威胁人类生命和健康的常见疾病。虽然冠状动脉旁路移植术和血管内介入治疗已经得到充分发展，但仍有一部分严重冠心病患者不能得到有效的治疗。近年来，冠心病的基因治疗成为研究的热点。本文从以下几方面对冠心病基因治疗的研究进展进行简要介绍；目的基因的选择，基因载体的选择和心脏基因导入途径的选择。对于血管内皮生长因子基因，成纤维细胞生长因子基因，肝细胞生长因子基因和促血管生成素－1基因在冠心病治疗中应用的实验和研究现状提供了重点介绍。     

MMP-9 R279Q基因多态性与冠心病易感性的Meta分析

 目的 探讨MMP-9 R279Q基因多态性与冠心病易感性的关系。方法 检索PubMed,获取2012年1月1日以前发表的MMP-9 R279Q基因多态性与冠心病易感性的病例-对照研究。以冠心病组与对照组人群基因型分布的OR值及95%CI为效应指标,在纯合子比较模型、显性模型和隐性模型中采用固定效应方法进行合并分析, 并进行偏倚评估,应用STATA11.0软件进行统计学处理。结果 共纳入文献5篇,在MMP-9 R279Q多态性位点,基因型比较模型中合并OR值为0.925 (95% CI = 0.847-1.009),纯合子比较模型合并OR值为0.866 (95% CI = 0.713-1.052),显性模型合并OR值为0.909 (95% CI = 0.809-1.020),隐性模型合并OR值为0.902 (95% CI = 0.750-1.086)。结论 MMP-9 R279Q基因多态性可能与冠心病易感性无关。     

单纯性先天性心脏病易感区域12q13内HOXC簇基因单核苷酸多态单倍型分析

目的 在人类单纯性先天性心脏病（congenital heart disease，CHD）易感区12q13内，选取HOXC4、HOXC5、HOXC6基因内4个已知单核苷酸多态（single nucleotide polymorphism，SNP）G7471T、C16476T、A17860G、A36130G，检测其在单纯性CHD患者和正常人群中的分布情况，分析各个SNP位点及所构成单倍型与单纯性CDH的相关性。方法 应用限制性片段长度多态性和变性高效液相色谱法结合测序，分析108例单纯性先天性心脏病患者及200名正常人4个SNP位点基因型；应用列联表法统计分析患者组和对照组各SNP位点基因型及等位基因频率；应用PHASE软件构建单倍型并统计分析患者组及对照组单倍型频率是否存在差异。结果 C16476T未检测到多态；位于HOXC5基因3’侧翼序列的SNP位点A17860G等位基因频率及基因型频率在患者组和对照组中的分布差异有统计学意义，患者组G等位基因频率明显高于对照组（P〈0．05）；单倍型分析可见4种单倍型在患者组和对照中的分布频率有统计学意义（P〈0．01）；G7471／G17860／G36130和G7471／G17860／A36130为人群中常见单倍型，与对照组相比，患者组中G7471／G17860／G36130、G7471／G17860／A36130两种单倍型频率较高。结论 HOXC5基因3’侧翼序列的SNP位点A17860G与单纯性CHD有明显的相关性，具有G等位基因的人发生CHD的危险性相对增高；3个SNP位点所构成的单倍型有一定意义，可能与单纯性CHD易感基因相连锁。     

Associations between CD36 gene polymorphisms and susceptibility to coronary artery heart disease

Associations between polymorphisms of the CD36 gene and susceptibility to coronary artery heart disease (CHD) are not clear. We assessed allele frequencies and genotype distributions of CD36 gene polymorphisms in 112 CHD patients and 129 control patients using semi-quantitative polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP) analysis. Additionally, we detected CD36 mRNA expression by real-time quantitative PCR, and we quantified plasma levels of oxidized low-density lipoprotein (ox-LDL) using an enzyme-linked immunosorbent assay (ELISA). There were no significant differences between the two groups (P>0.05) in allele frequencies of rs1761667 or in genotype distribution and allele frequencies of rs3173798. The genotype distribution of rs1761667 significantly differed between CHD patients and controls (P=0.034), with a significantly higher frequency of the AG genotype in the CHD group compared to the control group (P=0.011). The plasma levels of ox-LDL in patients with the AG genotype were remarkably higher than those with the GG and AA genotypes (P=0.010). In a randomized sample taken from patients in the two groups, the CD36 mRNA expression of the CHD patients was higher than that of the controls. In CHD patients, the CD36 mRNA expression in AG genotype patients was remarkably higher than in those with an AA genotype (P=0.005). After adjusted logistic regression analysis, the AG genotype of rs1761667 was associated with an increased risk of CHD (OR=2.337, 95% CI=1.336-4.087, P=0.003). In conclusion, the rs1761667 polymorphism may be closely associated with developing CHD in the Chongqing Han population of China, and an AG genotype may be a genetic susceptibility factor for CHD.     

结合珠蛋白基因1/2多态性与中国人冠心病易感性的关联研究

目的 通过分析冠心病患者及冠脉正常组中结合珠蛋白(haptoglobin,HP)基因1/2多态性分布,初步探讨HP基因1/2多态性与冠心病易感性的关系.方法 经冠脉造影确诊冠心病组189例,冠脉正常对照组242名;采用聚合酶链反应-限制性片段长度多态性技术检测所有受试者HP基因型.结果 冠心病组HP基因型分布与对照组相比差异有统计学意义(P=0.002),表现为HP2-2基因型在冠心病组的频率明显高于对照组(0.54vs.0.35,P=0.000),单因素分析显著增加冠心病的风险(OR=2.166,95%CI:1.467～3.196),HP2等位基因的频率也明显高于对照组(0.74 vs.0.61).同时,多因素Logistic回归分析表明HP2-2基因型是冠心病的独立危险因素(P=0.002;OR=2.101,95%CI:1.311～3.367).结论 HP2-2基因型与冠心病的发生相关,可能是冠心病发病的独立危险因子;HP2等位基因可能是中国人冠心病的易感基因.

Abstract：

Objective To assess the association of haptoglobin (HP)1/2 polymorphism with coronary heart disease (CHD) in Chinese Hans. Methods One hundred and eighty-nine CHD patients and 242 healthy controls confirmed with angiography were recruited. Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method was utilized to genotype the HP1 and HP2 alleles and genotype frequencies in cases and controls were compared. Results The frequency of HP2-2 genotype was significantly higher in CHDs than in controls (0. 54 vs. 0.35, P=0.000). The HP2-2 genotype significantly increased the risk for CHD in univariable analysis (OR= 2. 165, 95% CI: 1. 467-3. 196). Multifactor Logistic regression analysis indicated that HP2-2 genotype is an independent risk factor to CHD (P=0.002;OR=2. 101, 95% CI: 1. 311-3. 367). Similarly, the HP2 allele frequency in the CHD group was significantly higher than that in the control subjects (0.74 vs. 0. 61, P= 0. 000). Conclusion The HP2-2genotype is associated with CHD in Chinese. HP2-2 genotype may be an independent risk factor to CHD,and HP2 allele may be a genetic susceptibility factor to CHD in Chinese.     

Apolipoprotein E polymorphism, age and coronary heart disease

Plasma concentrations of lipids, lipoproteins, and apolipoproteins (apo) are established risk factors for coronary heart disease (CHD). The knowledge of lipid profile may predict the potential victims of cardiovascular disease before its initiation and progression and offer the opportunity for primary prevention. The most common apo E polymorphism has been found to influence blood lipid concentrations and its correlation with CHD has been extensively investigated in the last decade. At younger ages, death from CHD is influenced by genetic factors, while the genetic effect decreases at older ages where environmental factors may play a more prominent role. If apo E polymorphism is an important genetic factor in the pathogenesis of atherosclerosis, it could affect the age of CHD onset. This review analyses the influence of apo E polymorphism on blood lipids and CHD in respect to age.     

血管内皮生长因子基因多态性与先天性心脏病相关性的Meta分析

目的 评价血管内皮生长因子（VEGF）等位基因、基因型、基因单倍型多态性与先天性心脏病（CHD）的相关性.方法 检索Cochrane图书馆、Medline、PubMed、EMBASE、中国期刊全文数据库、万方数据库及中国生物医学文献数据库,检索起止时间均为建库至2011年12月,并且对重要文献的参考文献采取手工回溯检索.获取VEGF与CHD相关性的病例对照研究和传递不平衡检验文献.对文献进行质量评价.采用RevMan 5.1.1软件进行异质性检验,根据检验结果选择适当的效应模型进行Meta分析.结果 6篇文献共10项独立研究纳入分析,漏斗图检验存在发表偏倚.Meta分析结果显示：① VEGF C-2578A和G-1154A位点等位基因变异显著增加DiGeorge综合征患者的CHD易感性,OR分别为1.40（95%CI：1.04～1.16）和1.87（95%CI：1.27～2.75）;G-634C位点的等位基因变异显著增加普通病例的CHD易感性,OR=1.29,95%CI：1.02～1.62.② G-1154A位点（AA＋AG）为DiGeorge综合征患者合并CHD的危险因素,OR=2.10,95%CI：1.32～3.34.③单倍型AAG在DiGeorge综合征患者中显著增加CHD易感性,OR=1.82,95%CI：1.31～2.54;单倍型CGC显著降低普通病例CHD风险的保护作用,OR=0.79,95%CI：0.63～0.99.结论 VEGF等位基因、基因型、基因单倍型多态性与CHD易感性存在一定的相关性,且在DiGeorge综合征患者与普通患者间存在差异;在不伴DiGeorge综合征的人群中,特定单倍型（CGC）则有显著降低CHD风险的保护作用,其作用机制尚需进一步明确.     

MTHFR基因多态性与老年冠心病及同型半胱氨酸的相关性研究

目的探讨N5,N10亚甲基四氢叶酸还原酶（MTHFR）基因多态性及血浆同型半胱氨酸（Hcy）与老年冠心病的相关性。方法应用高效液相色谱法和多聚酶链反应限制性内切酶片段长度多态性技术检测并比较了120例老年冠心病患者（CHD组）和58例健康老年人（对照组）的血浆Hcy浓度及MTHFR基因型。结果两组MTHFR 677位点基因型分布和各等位基因频率比较均有统计学差异（P均〈0.05）;CHD组T等位基因频率及血浆Hcy浓度高于对照组（P均〈0.05）。结论 MTHFR基因突变可导致血浆Hcy浓度升高,高Hcy浓度及MTHFR基因T型均为老年CHD的高危因素。     

汉族人血小板GPⅡb HPA-3基因多态性与冠心病的相关性研究

目的： 观察血小板膜糖蛋白（GP）Ⅱb人类血小板抗原-3（HPA-3）基因多态性,在北京河北地区汉族人中各基因型的分布频率,分析该多态性与冠心病易感性的相关性。方法: 本研究采用病例对照设计,筛选符合冠心病、健康人入选标准的212例冠心病患者及106例健康对照人群为研究对象,记录冠脉造影病变支数,采用TaqMan探针技术检测HPA-3基因多态性。结果: 大于45岁的人群中,至少含有1个HPA-3b等位基因者较HPA-3a/3a原生型纯合子,冠心病人(72.4%/27.6%)多于健康人(57.1%/42.9%),不同基因型在冠心病组和健康对照组两组间的分布具有显著差异(P<0.05);冠心病患者不同病变支数基因型构成无显著差异(P＞0.05)。以是否患冠心病为因变量的二分类Binary Logistic回归分析,校正年龄、性别、体重指数对冠心病的影响后,结果显示HPA-3多态位点基因型与冠心病发病密切相关,含有至少1个HPA-3b等位基因者较HPA-3a/HPA-3a纯合型发生冠心病的危险性是2.105倍。结论: GPⅡb的HPA-3多态位点是汉族人冠心病发病的独立危险因素,尤其在年龄＞45岁的人群中表现明显。     

Association of interleukin-18 gene single-nucleotide polymorphisms with susceptibility to inflammatory bowel disease

Interleukin-18 (IL-18) is believed to be one of the most important cytokines in the pathogenesis of inflammatory bowel disease (IBD). The aim of the study was to clarify the significance of single-nucleotide polymorphisms (SNPs) at the 5'-end of the IL-18 gene in the development of IBD. DNA was obtained from peripheral blood of 99 patients with ulcerative colitis (UC), 79 patients with Crohn's disease (CD), and 102 healthy controls. All participants were Japanese. SNPs at -656G/T, -607C/A, -137G/C, +113T/G, and +127C/T were determined by means of direct sequencing, and a genetic association with IBD was examined. The frequencies of the G allele at +113 and the T allele at +127 were significantly higher in patients with CD and UC compared with controls. The differences in allelic frequencies were more striking in patients with CD than in patients with UC, and at position +127 than at position +113. The haplotype estimation, according to the E-M algorithm, suggested that TACGT is closely associated with IBD, especially with CD. It was concluded that SNPs at the 5'-end of IL-18 gene might be closely related to the etiology of IBD.