广西壮族人群ICAM-1基因多态性及血清水平与脑梗死关系的研究

探讨细胞间黏附分子1(ICAM-1)基因K469E多态性各等位基因及基因型在广西壮族脑梗死患者中的分布频率,初步分析其基因及血清水平与脑梗死的关系。采用聚合酶连反应-限制性片段长度多态性(PCR-RFLP)和DNA序列测定法检测19例脑梗死及210例对照者ICAM-1基因第6外显子K469E多态性,同时采用酶联免疫吸附试验(ELISA)检测脑梗死和对照者血清ICAM-1水平。脑梗死组ICAM-1血清水平显著高于对照组(P<0.01),ICAM-1基因K469E基因频率和等位基因频率在脑梗死组和对照组比较差异有显著性(P<0.05),等位基因频率的相对风险分析发现,E等位基因携带者患脑梗死的风险是K等位基因的1.454倍(OR=1.454,95%CI1.090～1.940),携带E等位基因的脑梗死患者ICAM-1血清水平显著高于不携带者(503.31±141.32)ng/ml和(489.80±122.43)ng/ml,(P<0.01)。ICAM-1基因K469E多态性与脑梗死的发病具有相关性,E等位基因可能是广西地区壮族人脑梗死发病的遗传易感基因,携带E等位基因的个体可能通过促进ICAM-1的高度表达进而增加脑梗死的发病风险。     

细胞间黏附分子1基因K469E多态性与冠状动脉粥样硬化性心脏病的关联研究

目的研究中国汉族人群中细胞间黏附分子1（intercellular adhesion moleculel，ICAM1）基因K469E多态性与冠状动脉粥样硬化性心脏病（简称冠心病）的关联。方法采用聚合酶链反应．限制性片段长度多态性方法检测了173例冠心病患者和141名对照的ICAM1基因K469E基因型和等位基因的分布。结果基因型频率符合Hardy-Weinberg平衡。冠心病组的KK基因型的频率显著高于对照组（64．2％比48．9％，P〈0．01），同样，冠心病组K等位基因的频率显著高于对照组（79．2％比69．9％，P〈0．01）。经Logistic回归分析排除年龄，性别，和冠心病其它危险因素的影响后，KK纯合子患冠心病的危险性是KE和EE基因型的2．35倍（95％CI：1．03-5．36，P〈0．05）。结论ICAM1基因K469E多态性与中国汉族人冠心病的危险性相关，其中K等位基因可能是冠心病的遗传危险因素。     

细胞间黏附分子-1基因K469E多态性与广西壮族人群缺血性脑卒中的遗传易感性

目的探讨细胞间黏附分子-1(intercellular adhesion molecule-1, ICAM-1)基因多态性与广西地区壮族人群缺血性脑卒中(ischemic stroke,IS)的关系.方法采用聚合酶链反应-限制性片段长度多态性和DNA序列测定法检测205例IS及210名对照者 ICAM-1基因第6外显子K469E多态性,同时采用酶联免疫吸附试验检测IS和对照者血清ICAM-1水平. 结果 IS组ICAM-1血清水平显著高于对照组(P<0.01), ICAM-1基因K469E基因型频率和等位基因频率在IS组和对照组比较差异有统计学意义(P<0.05),等位基因频率的相对风险分析发现,E等位基因携带者患IS的风险是K等位基因的1.424倍(OR=1.424,95%CI1.071～1.894),携带E等位基因的IS患者ICAM-1血清水平显著高于不携带者[(501.24±139.56)ng/ml vs(475.17±118.35)ng/ml, P<0.01]. 结论 ICAM-1基因K469E多态性与IS的发病具有相关性,E等位基因可能是广西地区壮族人群IS发病的遗传易感基因,携带E等位基因的个体可能通过促进 ICAM-1的高度表达进而增加IS的发病风险.     

纤维蛋白原Bβ链基因-1420G/A、-993C/T和-854G/A多态性与冠状动脉粥样硬化性心脏病的关联研究

目的调查健康人和冠状动脉粥样硬化性心脏病(简称冠心病)患者的纤维蛋白原B(fibrino-genB,FGB)β基因-1420G/A、-993C/T和-854G/A的基因多态性频率分布,以及与血浆Fg水平的关系。方法应用等位基因特异性PCR扩增技术和限制性片段长度多态性技术对186例冠心病患者和149名健康对照者进行分析。比浊法测定血浆Fg浓度。结果等位基因频率-1420A在冠心病组为0.33,在对照组为0.26,冠心病组明显比对照组升高,两者比较差异有统计学意义(P<0.05)。等位基因频率-993T和-854A在两组之间无差别。Logistic回归分析显示β-1420G/A与冠心病相关(OR=1.922,P=0.003)。冠心病组血浆Fg水平(3.87±1.75)g/L较健康人组(3.10±0.77)g/L明显升高,且差异有统计学意义(P<0·05)。结论纤维蛋白原Bβ-1420G/A可能与冠心病发病相关联。     

同型半胱氨酸水平和胱硫醚合成酶(CBS 844ins 68)基因多态性与冠心病的关系

目的探讨同型半胱氨酸(Hcy)和胱硫醚合成酶(CBS844ins68)基因多态性与冠心病的关系。方法运用多聚酶链反应限制性内切酶片段长度多态性技术(PCR)和荧光偏振法(FPIA)检测86例冠心病及143例对照组CBS基因多态性和血浆总Hcy水平。结果(1)冠心病病例组与对照组血浆Hcy分别为(16.83±4.20)μmol/L和(9.97±2.43)μmol/L,差异有统计学意义(P<0.05)。(2)病例组与对照组CBS基因分布频率和等位基因频数分布差异无统计学意义(P>0.05)。结论CBS844ins68多态性与冠心病无明显相关,高同型半胱氨酸血症与冠心病发生有一定关系。     

MTHFR基因C677T多态性与冠心病患者血浆同型半胱氨酸和叶酸水平相关

目的研究宁夏地区汉族人群5,10-亚甲基四氢叶酸还原酶基因(MTHFR)C677T多态性、同型半胱氨酸水平(Hcy)及叶酸水平与冠心病(CHD)的相关性。方法用病例-对照研究方法、应用限制性片段长度多态性扩增技术(PCR-RFLP)分析宁夏地区汉族202例冠心病患者及199例正常人群MTHFRC677T基因型频率及基因频率的分布特点。荧光偏振免疫分析法测定血浆Hcy水平,化学发光免疫分析法测定血清叶酸、VitB12浓度。结果 (1)病例组与对照组MTHFRC677T基因型频率分别为CC型23.3%vs20.7%、CT型52.3%vs54.5%和TT型24.4%vs24.8%,两组间基因型及等位基因频率分布无差异。(2)冠心病患者组中MTHFR基因C677TCC基因型患者血浆Hcy浓度(10.84μmol/L)较T基因携带者(12.24μmol/L)低(P<0.01)。CC基因型患者血浆叶酸浓度(5.38μg/L)较T基因携带者(3.72μg/L)高(P<0.05)。结论 MTHFRC677T的3种基因型频率在宁夏汉族冠心病患者和正常人群中的分布无统计学意义。MTHFR基因C677T多态性与冠心病的危险因素Hc...     

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。     

对氧磷酶1 55 Met/Leu、对氧磷酶2 148 Ala/Gly基因多态性与冠状动脉粥样硬化性心脏病的关系

目的探讨对氧磷酶1 55Met/Leu(paraoxonase 1, PON1 55Met/Leu)、对氧磷酶2 148 Ala/Gly(PON2148 Ala/Gly)基因多态性与冠状动脉粥样硬化性心脏病(简称冠心病)、血浆对氧磷酶(paraoxonase,PON)、总超氧化物歧化酶(total superoxide dismutase, T-SOD)活性以及丙二醛(maleic dialdehyde, MDA)浓度的关系.方法采用聚合酶链反应-限制性片段长度多态性方法检测262例冠心病患者和100名对照的PON1 55Met/Leu、PON2 148 Ala/Gly基因多态性,采用比色法测定血浆PON、T-SOD活性以及MDA浓度.结果与对照比较,冠心病患者的血浆PON[(349.27±138.36) nmol/min· mL vs. (454.75±166.00) nmol/min*mL, P<0.01]、T-SOD[(23.61±16.51) U/mL vs. (44.01±22.68) U/mL, P<0.01]活性明显降低,MDA浓度显著增高[(2.47±0.73) nmol/mL vs. (2.15±0.55) nmol/mL, P<0.01];冠心病患者的PON1 55 LM杂合子基因型(24.8% vs. 1.4%, P<0.01)、M等位基因频率(12.4% vs. 0.5%,P=0.001),PON2148 GG纯合子基因型和AG 杂合子基因型(11.8% vs. 5.0%和48.1% vs. 24.0%, P<0.01)、G等位基因频率(36.0% vs. 17.0%, P<0.01)较对照组明显增高;PON1 55 LM杂合子基因型的PON和T-SOD活性较LL纯合子基因型明显降低(P<0.01和P<0.05);PON2148 GG基因型和AG基因型的PON活性较AA基因型明显降低(P<0.01);Logistic回归分析显示PON1 55 LM杂合子基因型、M等位基因、PON2 148GG/AG基因型、G等位基因是冠心病的危险因子.结论冠心病患者的血浆PON和T-SOD活性明显降低,MDA浓度显著增高;PON1 55Met/Leu的LM基因型和M等位基因、PON2148 Ala/Gly的GG/AG基因型和G等位基因是冠心病的危险因子,并且与其他基因型相比,这些基因型患者的血浆PON活性降低.     

TGF-β1基因启动子-800G/A、-509C/T多态性与食管癌的研究

目的研究转化生长因子β1(TGF-β1)基因启动子多态性各等位基因及基因型在食管癌患者中的分布频率,初步分析其基因型及血清水平与食管癌的相关性.方法采用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)技术,检测118例食管癌患者和130例正常对照组TGF-β1的基因多态性,包括TGF-β1基因启动子-800G/A、-509C/T位点,同时采用ELISA检测血清TGF-β1水平.结果食管癌患者血清TGF-β1水平显著高于对照组(P＜0.01),TGF-β1基因-800G/A位点多态性在食管癌组和正常人群中的分布差异无显著性(P＞0.05),而TGF-β1基因-509C/T多态性各等位基因及基因型频率在两组人群中的分布差异存在显著性(P＜0.05);等位基因频率的相对风险分析发现,T等位基因携带者患食管癌的风险是C等位基因的1.624倍(OR=1.624,95%CI1.134～2.324),携带T等位基因的食管癌患者血清TGF-β1水平显著高于不携带者(50.97±8.91μg/LVS44.23±8.54μg/L,P＜0.01).结论TGF-β1基因-509C/T多态性与食管癌的发病具有相关性,其中T等位基因可能是食管癌发病的遗传易感基因;携带T等位基因的个体可能通过促进TGF-β1的高度表达进而增加了食管癌的发病风险.     

转化生长因子β1基因869T/C、915G/C多态性与食管癌关系的研究

目的研究转化生长因子β1(TGF-β1)第1外显子+869T/C、+915G/C基因多态性与广西地区食管癌的关系。方法采用序列特异性引物聚合酶链反应(PCR-SSP)技术,检测118例食管癌患者和130例正常对照组TGF-β1的基因多态性,同时采用酶联免疫吸附试验(ELISA)检测血清TGF-β1水平。结果食管癌患者血清TGF-β1水平显著高于对照组(P<0.01),TGF-β1基因+915G/C多态性各等位基因及基因型频率在两组人群中的分布差异有统计学意义(P<0.05),等位基因频率的相对风险分析发现,C等位基因携带者患食管癌的风险是G等位基因的3.077倍(OR=3.077,95%CI1.336~7.087),携带C等位基因食管癌患者血清TGF-β1水平显著高于不携带者[(55.37±9.76)μg/Lvs(48.29±8.29)μg/L,P<0.05];而TGF-β1基因+869T/C多态性在食管癌组和正常人群中的分布差异无统计学意义(P>0.05)。结论TGF-β1基因+915G/C多态性与食管癌的发病具有相关性,其中C等位基因可能是食管癌发病的遗传易感基因;携带C等位基因的个体可能通过促进TGF-β1的高度表达进而增加了食管癌的发病风险。     

Genetic study of ICAM1 in clinical malaria in Senegal

Many genes have been implicated in the risk of severe malaria, generally based on candidate gene studies in case/control populations. Among these genes, there has been conflicting reports for the implication of a variant of the intercellular adhesion molecule 1 (ICAM1), ICAM1(Kilifi), in the risk of severe malaria, while in vitro studies provided independent support for a functional role of this variant. In order to explore the possible implication of ICAM1 in the susceptibility/resistance to malaria and to try to understand its clinical relevance in the disease process, we have conducted linkage and association studies of ICAM1 in two Senegalese villages located in regions of endemic malaria. We explored the full genetic variability of ICAM1, and tested it on several clinical malarial traits which are under genetic control, focusing principally on variables related to the parasite density and the number of malarial attacks. Our study provides no evidence for a role of ICAM1 variability on the malarial phenotypes studied.     

Induction of ICAM 1 expression on bladder tumours by BCG immunotherapy.

AIMS--To determine the expression of intercellular adhesion molecule 1 and 2 (ICAM 1 and 2) in transitional cell carcinoma cells before and after immunotherapy with Calmette-Guérin bacillus (BCG). METHODS--Frozen sections from 22 untreated bladder carcinomas were immunohistochemically examined with monoclonal antibodies to ICAM 1 and 2. Urinary cytospin slides were made for six patients for each of the six clinical instillations which constitute a therapeutic course. These slides were also stained for ICAM 1 and for leucocyte function associated antigen 1 (LFA 1). RESULTS--Bladder cancer cells did not essentially express either ICAM 1 or 2, but cells in the stromal areas surrounding tumour expressed both these antigens. After repeated instillations of BCG organisms ICAM 1 positive normal and neoplastic epithelial cells were observed in the urine. Cells obtained from the first three instillations expressed lower densities of ICAM 1 than those from the later instillations. Many neutrophils expressing LFA-1 and some lymphocytes were also noted in the cytospin slides and some of these were conjugated to tumour cells expressing ICAM 1. Six months after treatment a single maintenance dose of BCG induced ICAM 1 expression. CONCLUSION--Untreated superficial bladder carcinoma cells do not express ICAM 1 or 2, but these important immunological molecules were expressed in the stromal areas of tissue. Importantly, neoplastic cells in the urine expressed ICAM 1 after immunotherapy. This molecule can render bladder tumour cells vulnerable to non-antigen specific cytotoxicity mediated by activated lymphocytes.     

Variation in the ICAM1 gene is not associated with severe malaria phenotypes

Evidence from autopsy and in vitro binding studies suggests that adhesion of erythrocytes infected with Plasmodium falciparum to the human host intercellular adhesion molecule (ICAM)-1 receptor is important in the pathogenesis of severe malaria. Previous association studies between polymorphisms in the ICAM1 gene and susceptibility to severe malarial phenotypes have been inconclusive and often contradictory. We performed genetic association studies with 15 single nucleotide polymorphisms (SNPs) around the ICAM1 locus. All SNPs were screened in a family study of 1071 trios from The Gambia, Malawi and Kenya. Two key non-synonymous SNPs with previously reported associations, rs5491 (K56M or 'ICAM-1(Kilifi)') and rs5498 (K469E), were tested in an additional 708 Gambian trios and a case-control study of 4058 individuals. None of the polymorphisms were associated with severe malaria phenotypes. Pooled results across our studies for ICAM-1(Kilifi) were, in severe malaria, odds ratio (OR) 1.02, 95% confidence interval (CI) 0.96-1.09, P=0.54, and cerebral malaria OR 1.07, CI 0.97-1.17, P=0.17. We assess the available epidemiological, population genetic and functional evidence that links ICAM-1(Kilifi) to severe malaria susceptibility.     

ICAM-1抗体诱导小鼠胸腺上皮细胞分泌IL-6

目的研究胸腺细胞和ＩＣＡＭ－１抗体对胸腺上皮细胞分泌ＩＬ－６的作用。方法用促ＩＬ－６依赖株增殖法检测ＩＬ－６活性，用原位杂交法检测ＩＬ－６ｍＲＮＡ的表达。结果不同的胸腺细胞亚群均能促进ＭＴＥＣ１分泌ＩＬ－６，而且作用无明显差异。ＩＣＡＭ－１抗体能够促进ＭＴＥＣ１分泌ＩＬ－６，其促进作用呈剂量依赖关系。放线菌酮预处理ＭＴＥＣ１以后，ＩＣＡＭ－１抗体和胸腺细胞均不再能促进ＭＴＥＣ１分泌ＩＬ－６。原位杂交证实，经胸腺细胞和ＩＣＡＭ－１抗体活化后，ＭＴＥＣ１表达ＩＬ－６ｍＲＮＡ明显增多，并且表达ＩＬ－６ｍＲＮＡ的ＭＴＥＣ１数量也增多。提示胸腺细胞和ＩＣＡＭ－１抗体能促进ＭＴＥＣ１合成新的蛋白和ｍＲ－ＮＡ。结论胸腺微环境内，胸腺细胞可以通过粘附分子与胸腺上皮细胞相互作用，并可促进胸腺上皮细胞分泌ＩＬ－６。     

ICAM1 R241 is not associated with celiac disease in the Spanish population

Celiac disease (CD) is a chronic intestinal inflammatory disease that develops in genetically susceptible individuals after gluten ingestion. The ICAM1 gene, located in the CD linkage region 19p13, encodes an intercellular adhesion molecule (ICAM-1) involved in inflammatory processes. Increased levels of ICAM-1 were observed in intestinal biopsies and in sera of CD patients. In addition, an association between the ICAM1 polymorphism G241R and CD patients has been recently described in a French population. Our aim in this study was to analyze the role of ICAM1 polymorphisms in CD susceptibility in the Spanish population. We performed a case-control study with 608 CD patients and 537 healthy control individuals and a family study including 231 trios. Four ICAM1 single nucleotide polymorphisms (SNPs) were analyzed: three nonsynonymous, R478W (rs5030400), P352L (rs1801714) and G241R (rs1799969); and one intronic, rs281432. Despite having above 98% statistical power to detect the association described in the French population (odds ratio = 1.7), we did not find any differences in genotypic or allelic frequencies of the G241R polymorphism between our CD patients and controls, and no differences were observed when the other SNPs were analyzed. Therefore, in our population our results discard the important previously described role of ICAM1 G241R in celiac disease.     

巨细胞病毒感染与粘附分子-1基因转录水平的实验研究

目的研宄人巨细胞病毒(human cytomegalovirus,HCMV)感染人胚肺成纤维细胞(human embryonic lung,HEL)后粘附分子-1(ICAM-1)在基因转录水平的表达,探讨HCMV感染的发病机制.方法采用RT-PCR技术研究细胞ICAM-1-1在基因转录水平的表达.结果感染巨细胞病毒后ICAM-1的表达上调,而UV灭活的CMV不能诱导ICAM-1的上调,中药金叶败毒制荆与更昔洛韦(Ganciclovir,GCv)不能阻止病毒诱导的ICAM-1的上调.MEK特异性抑制子PD98059可加强ICAM-1的上调作用.结论细胞ICAM-1-1在转录水平的上调可能是感染病毒的直接作用,MEK特异性抑制子PD98059加强ICAM-1上调作用.     

Expression of ICAM1 and VCAM1 Serum Levels in Rheumatoid Arthritis Clinical Activity. Association with Genetic Polymorphisms

To investigate the association of sICAM-1 and sVCAM-1 with ICAM1 721G>A and VCAM1 1238G>C polymorphisms and rheumatoid arthritis (RA) clinical activity, sixty RA patients and 60 healthy non-related subjects (HS) matched for age and sex were recruited. Soluble adhesion molecules were determined by ELISA technique. Rheumatoid factor (RF), C reactive protein (CRP) and the erythrocyte sedimentation rate (ESR) were measured by routine methods. Disability and clinical activity was measured with Spanish-HAQ-DI and DAS28 scores, respectively. The ICAM1 and VCAM1 polymorphism were identified using the PCR-RFLP procedure. Inter-group comparison showed increased levels of sICAM-1 and sVCAM-1 in RA patients (284 and 481 ng/mL) versus HS (132 and 280 ng/mL); in the RA group, significant correlations between sVCAM-1 and RF (r = 0.402), ESR (r = 0.426), Spanish-HAQ-DI (r = 0.276), and DAS28 (r = 0.342) were found, whereas sICAM-1 only correlated with RF (r = 0.445). In RA patients, a significant association with the 721A allele of ICAM1 polymorphism (p = 0.04), was found. In addition, the allele impact (G/A + A/A) of this polymorphism was confirmed, (p = 0.038, OR = 2.3, C.I. 1.1–5.0). sVCAM-1 and sICAM-1 serum levels reflected the clinical status in RA, independently of the ICAM1 and VCAM1 polymorphism. However, the ICAM1 721A allele could be a genetic marker to RA susceptibility.     

蛛网膜下腔出血后基底动脉细胞间粘附分子-1的表达

目的：探讨蛛网膜下腔出血（SAH）后迟发性脑血管痉挛的病理过程中细胞间粘附分子－1（ICAM－1）与其发生时相间的关系。方法：采用49只雄性SD大鼠，随机分为实验组和对照组，实验组按存活时间分为6组，采用经额钻孔、注血的方法制作SAH动物模型。切取基底动脉，分别行HE染色和ICAM－1免疫组化染色，进行体视学图像分析。结果：病理切片经图像分析，在SAH后1h和48h管腔面积显缩小（P＜0．001），48h后基底动脉壁发生明显病理形态学变化。SAH后3h血管内皮细胞ICAM－1表达逐渐增强，48h后达到高峰。结论：SAH后可引发急性脑血管痉挛和迟发性脑血管痉挛。ICAM－1参与的炎症反应在SAH后迟发性脑血管痉挛的形成和发展过程中发挥关键性作用。     

ICAM1 amino-acid variant K469E is associated with paediatric bronchial asthma and elevated sICAM1 levels

Intercellular adhesion molecule-1 (ICAM1) acts as ligand for beta2-integrin molecules and mediates leucocyte trafficking to the site of inflammation. Intercellular adhesion molecule-1-deficient mice show impaired lymphocyte recruitment to the lung, less airway hyper-responsiveness and less lung inflammation than healthy controls. Thus, the aim of the study was to test common ICAM1 polymorphisms for association with paediatric asthma. Furthermore, we were interested in whether soluble ICAM1 (sICAM1) serum levels were in correlation with genotypes. The following polymorphisms in ICAM1 were genotyped on 352 children with asthma and 270 controls: rs5491 (resulting in the amino-acid exchange K56M), rs5493 (G241S), rs5498 (K469E), rs5030400 (R478W) and rs885743 in the 3'-untranslated region. In addition, sICAM1 serum levels were measured. Only K469E and rs885743 were present in our populations. K469E showed association with asthma (P = 0.0037 with Armitage's trend test). Haplotype analysis by FAMHAP using both polymorphisms revealed association with asthma by P < 0.000001. In addition, serum sICAM1 levels were correlated with K469E genotypes (P = 0.009 by Kruskal-Wallis test). We conclude from our data that K469KE is associated with paediatric asthma in the German population. Furthermore, the same polymorphism is correlated with serum levels of sICAM1. Functional analyses have to further clarify the pathophysiological mechanism conferred by the polymorphisms.