海南籍黎族和汉族急性脑梗死患者C反应蛋白和白细胞介素18的基因多态性研究

目的探讨C反应蛋白(CRP)-1059 G/C,白细胞介素18(IL-18)启动子基因-607 C/A和-137 G/C位点的基因多态性与海南黎、汉族人群急性脑梗死的相关性。方法选择汉族脑梗死患者115例为汉族脑梗死组和黎族脑梗死患者52例为黎族脑梗死组,分别与健康的汉族对照组116例和黎族对照组51例对照研究。测定CRP-1059 G/C、IL-18启动子基因-607 C/A和-137 G/C位点基因多态性。结果汉族脑梗死组CRP-1059 G/C位点C等位基因频率与汉族对照组比较,差异有统计学意义(P=0. 044),并且CRP-1059 G/C位点GG+GC基因型频率明显高于汉族对照组,CC基因型明显低于汉族对照组(78. 3%vs 87. 9%),差异有统计学意义(P=0. 049)。黎族脑梗死组CRP-1059 G/C、IL-18-607 C/A及IL-18-137 G/C位点的基因型和等位基因频率与黎族对照组比较,差异无统计学意义(P 0. 05)。多因素logistic回归分析显示,CRP-1059 GG+GC基因型为汉族脑梗死患者的独立危险因素(P 0. 05)。结论 CRP-1059 GG+GC基因型是海南籍汉族脑梗死患者的独立危险因素。而IL-18-607 C/A、IL-18-137 G/C基因多态性均与海南籍黎、汉族脑梗死患者无关。     

IL-18启动子区-137G/C和-607C/A位点多态性与结核病易感性关系——Meta分析

目的 应用Meta分析探讨IL-18基因启动子区单核苷酸多态性（single nucleotide polymorphism,SNP）等位基因位点-137和 -607与结核病易感性的关系。方法 收集采用序列特异性引物聚合酶链反应（PCR-SSP）及测序技术检测SNP位点-137和 -607的研究,在严格的质量评价基础上,通过统计学方法应用Review Manager 5.0软件进行了Meta分析。入选文献标准：(1)关于IL-18启动子区SNP -137 G/C和(或) -607 C/A与结核易感性关联的病例-对照研究;（2）对照组基因分布符合Hardy-Weinberg（H-W）遗传平衡定律;（3）原始资料完整;（4）文献中提供基因型频率或等位基因频率;（5）纳入文献语言为中文或英文;（6）多态性检测方法通过PCR-SSP及测序技术或SNaPshot SNP分型方法。文献排除标准：（1）重复报告的研究;（2）数据不清或等位基因不清的文献;（3）基于家系的研究;（4）对照组基因分布没有进行H-W遗传平衡检验的研究。结果 IL-18启动子区SNP -607 C/A位点研究6项,患者695例,正常对照879例;SNP -137 G/C位点研究5项,患者594例,正常对照781例。结核病组IL-18启动子区等位基因-137 G和 -607 C与对照组相比,等位基因-137 C和 -607 A的合并OR值分别为1.41（95% CI为1.15～1.74,P=0.001）和0.93（95% CI为0.81～1.08,P=0.36）。结论 IL-18启动子区SNP位点-137 G/C与结核病易感性相关联,提示IL-18启动子SNP（-137）是结核病的易感位点之一; SNP位点-607 C/A与结核病易感性之间关联无统计学意义。     

肝细胞癌患者IL-18基因-137G/C和-607A/C位点单核苷酸多态性变化及其意义探讨

目的探讨肝细胞癌(HCC)患者白细胞介素-18(IL-18)基因-137G/C和-607A/C位点单核苷酸多态性(SNP)的变化。方法在178例伴有HBV感染的HCC患者和251例健康人,取外周静脉血提取DNA,采用聚合酶链反应-连接酶检测反应(PCR-LDR)行基因分型,测定IL-18基因-137G/C和-607A/C位点SNP。结果 HCC患者和健康人IL-18-37 G/C基因GG基因型、GC基因型和CC基因型分布频率分别为75.3%对47.0%(P0.05)、20.8%对51.4%(P0.05)和3.9%对1.6%(P0.05),G等位基因和C等位基因分布频率分别为93.6%对72.7%(P0.05)和6.4%对27.3%(P0.05);HCC患者和健康人IL-18-607A/C位点AA基因型、AC基因型和CC基因型分布频率分别为37.6%对13.5%(P0.05)、43.3%对66.9%(P0.05)和19.1%对19.5%(P0.05),A等位基因和C等位基因分布频率分别59.3%对47.0%(P0.05)和40.7%对53.0%(P0.05);HCC组IL-18-137G/C位点的GG基因和G等位基因频率显著高于健康人(P0.05),HCC组IL-18-607A/C位点的AA基因和A等位基因频率也显著高于健康人(P0.05),提示携带IL-18-137G/C和IL-18-607A/C位点基因型和A等位基因者罹患HCC的风险增加。结论携带IL-18基因-137G/C位点GG基因型和G等位基因以及-607A/C位点AA基因型和A等位基因者可能更容易发生HCC,对HBV感染者筛查这些基因可能有助于早期发现肝肿瘤,以利于早期处理和改善预后。     

肝细胞癌患者IL-18基因-137G/C和-607A/C位点单核苷酸多态性变化及其意义探讨*

目的 探讨肝细胞癌（HCC）患者白细胞介素-18（IL-18）基因-137G/C和-607A/C位点单核苷酸多态性（SNP）的变化。方法 在178例伴有HBV感染的HCC患者和251例健康人,取外周静脉血提取DNA,采用聚合酶链反应-连接酶检测反应（PCR-LDR）行基因分型,测定IL-18基因-137G/C和-607A/C位点SNP。结果 HCC患者和健康人IL-18-37 G/C基因GG基因型、GC基因型和CC基因型分布频率分别为75.3%对47.0%（P<0.05）、20.8%对51.4%（P<0.05）和3.9%对1.6%（P>0.05）,G等位基因和C等位基因分布频率分别为93.6%对72.7%（P<0.05）和6.4%对27.3%（P<0.05）;HCC患者和健康人IL-18-607A/C位点AA基因型、AC基因型和CC基因型分布频率分别为37.6%对13.5%（P<0.05）、43.3 %对66.9%（P<0.05）和19.1%对19.5%（P>0.05）,A等位基因和C等位基因分布频率分别59.3%对47.0%（P<0.05）和40.7%对53.0%（P<0.05）;HCC组IL-18-137G/C位点的GG基因和G等位基因频率显著高于健康人（P<0.05）,HCC组IL-18-607A/C位点的AA基因和A等位基因频率也显著高于健康人（P<0.05）,提示携带IL-18-137G/C和IL-18-607A/C位点基因型和A等位基因者罹患HCC的风险增加。结论 携带IL-18基因-137G/C位点GG基因型和G等位基因以及-607A/C位点AA基因型和A等位基因者可能更容易发生HCC,对HBV感染者筛查这些基因可能有助于早期发现肝肿瘤,以利于早期处理和改善预后。     

IL-18基因型及血清IL-18水平与糖尿病肾病的相关性

目的观察IL-18基因型及血清IL-18水平与糖尿病肾病（DN）的相关性,探讨DN的发病机制。方法采用聚合酶链反应-限制性片段长度多态性技术,检测糖尿病（DM组）、DN组患者及正常对照组的IL-18基因多态性,用ELISA法检测其血清IL-18。结果DN组血清IL—18明显高于DM组和对照组（P均〈0．01）;IL-18基因-607C／A位点多态性三组比较无统计学差异（P〉0．05）,IL-18基因-137G／C多态性三组存在统计学差异（P〈0．05）;C等位基因携带者患DN的风险是G等位基因的1．876倍,携带C等位基因DN患者的血清IL-18明显高于未携带者（P〈0．05）。结论IL-18基因-137G／C多态性与DN发病有相关性,C等位基因可能是其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IL-18高度表达而增加DN发病风险。     

白细胞介素10基因多态性与脑梗死的关系

目的探讨白细胞介素10（IL-10）基因多态性与脑梗死的关系。方法用聚合酶链反应一限制性片段长度多态性技术，对204例脑梗死患者（脑梗死组）和131名健康者（对照组）的IL-10-592C／A、IL-10-819C／T及IL-10．1082G／A，共3个位点的基因多态性进行分析。结果脑梗死组IL-10—1082G／A基因型的分布频率与对照组比较，差异有统计学意义（X^2=11．764，P=0．001）；IL-10-1082A等位基因频率为99．5％，对照组为95．8％，两组比较差异有统计学意义（P=0．001）；IL-10-592C／A和IL-10-819C／T的基因型分布频率及等位基因频率与对照组比较差异无统计学意义（P〉0．05）。结论IL-10—1082G／A基因多态性与脑梗死的发病有一定关系，其中A等位基因频率增高与脑梗死发病有关。     

腹泻型肠易激综合征患者中IL-10基因多态性的研究

目的 探讨腹泻型肠易激综合征（D-IBS）与IL-10基因启动子区域-1082、-819和-592位点单核苷酸多态性之间的关系。方法用扩增受阻突变系统-PCR方法对41例健康对照和43例D-IBS患者IL-10基因启动子区域-1082、-819和-592位点单核苷酸多态性进行研究。结果 -819位点D-IBS患者T／T基因型频率显著高于健康对照组（67．4％比39．0％,P〈0．05）,C／T和C／C基因型频率虽较对照组低（分别为23．3％比43．9％和9．3％比17．1％）,但差异无统计学意义（P〉0．05）;-0592位点D-IBS患者A／A基因型频率显著高于对照组（67．4％比39．0％,P〈0．05）,C／A和C／C基因型频率均较对照组低（分别为23．3％比43．9％和9．3％比17．1％）,但差异无统计学意义（P〉0．05）;-1082位点基因型频率差异无统计学意义（P〉0．05）。IL-10启动子-819位点T等位基因频率在D-IBS患者显著高于健康对照组（79．1％比61．0％,P〈0．05）,C等位基因频率在D-IBS患者显著低于健康对照组（20．9％比39．0％,P〈0．05）;-592位点A等位基因频率在D-IBS患者显著高于对照组（79．1％比61．0％,P〈0．05）,C等位基因频率在D-IBS患者显著低于对照组（20．9％比39．0％,P〈0．05）;-1082位点G或A等位基因频率在D-IBS患者与对照组间差异无统计学意义。结论IL-10基因启动子区域一819T／T和-592A／A基因型可能与D-IBS发生有关。     

色素上皮衍生因子启动子区基因多态性与糖尿病微血管病变的关系

目的观察色素上皮衍生因子（PEDF）启动子区单核苷酸多态性（SNP）与糖尿病微血管病变的关系。方法将271例T2DM患者分为无糖尿病微血管病变组105例,合并糖尿病微血管并发症组166例,分析PEDF基因启动子区rs12150053T／C及rs12948385G／A的基因型和等位基因频率。结果两个SNPs位点等位基因频率均有统计学差异（P〈0．05）,rs12948385位点基因型频率也有统计学差异（P〈0．05）。结论PEDF启动子区多态性位点可能是我国北方汉族人群糖尿病微血管病变发病的危险因素之一。     

白介素18基因型及血清水平与2型糖尿病肾病的相关性

目的研究白介素18（IL-18）基因型及血清水平与2型糖尿病肾病（DN）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,检测360例2型糖尿病患者（160例伴DN）及180名正常对照组的IL-18的基因多态性,同时采用酶联免疫吸附试验（ELISA）检测血清IL-18水平。结果与对照组比较,糖尿病肾病组血清IL-18水平显著高于对照组（P〈0．01）。IL-18基因-137G／C多态性在两组人群中的分布差异有统计学意义（P〈0．05）,携带-137C等位基因的糖尿病肾病患者血清IL-18水平显著高于不携带者（P〈0．05）。结论IL-18基因-137G／C多态性与DN的发病可能具有相关性,其中C等位基因可能是DN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IL-18的高度表达进而增加了DN的发病风险。     

CD86基因启动子－3479 A／C 位点单核苷酸多态性与 ITP 遗传易感性的关系

目的：探讨CD86基因启动子－3479 A／C位点（ rs2715267）单核苷酸多态性与原发免疫性血小板减少症（ ITP）遗传易感性的关系。方法收集93例成人慢性ITP患者（ ITP组）及119例健康对照者（对照组）,提取两组外周血DNA,采用位点特异性PCR进行DNA分型检测。分型结果通过DNA测序方法进行验证。结果 CD86基因启动子－3479 A／C位点基因型AA、AC和CC在ITP组的分布频率分别为40．9％、52．6％及6．5％,在对照组的分布频率分别为49．6％、37．8％及12．6％,两组比较P 均＞0．05;等位基因A和C在ITP组的分布频率分别为67．2％、32．8％,在对照组的分布频率分别为68．5％、31．5％,两组比较P均＞0．05。两组同性别CD86基因启动子－3479 A／C位点等位基因及基因型的分布频率比较P均＞0．05。根据糖皮质激素治疗效果将ITP患者进行分组,结果显示,激素有效组、激素无效组CD86基因启动子－3479 A／C位点等位基因及基因型的分布频率比较P均﹥0．05。结论 CD86基因启动子－3479 A／C位点的单核苷酸多态性可能与ITP的遗传易感性无关。     

Association of polymorphisms of interleukin-18 gene promoter region with chronic hepatitis B in Chinese Han population

AIM: To investigate the polymorphisms of interleukin-18 (IL-18) gene promoters, and to disclose whether such polymorphisms are associated with susceptibility to chronic hepatitis B in Chinese Han population. METHODS: Using polymerase chain reaction with sequence specific primers (PCR-SSP) method, the single nucleotide polymorphisms (SNPs) of the promoter region of IL-18 gene at position -607 and -137 were detected in 231 patients with chronic hepatitis B and 300 normal controls. RESULTS: Allele C at position -607 in the promoter of IL-18 gene was detected in 48.7% of normal controls and 51.9% of patients, while allele A at position -607 was detected in 51.3% of normal controls and 48.1% of patients. The frequencies of -607CC, -607 CA and -607AA genotypes in normal controls were 22.0%, 53.3% and 24.7% respectively and in chronic hepatitis B patients were 26.8%, 50.2% and 23.0% respectively. Allele G at position -137 in the promoter of IL-18 gene was detected in 82.3% of normal controls and 88.5% of chronic hepatitis B patients, while allele C at position -137 was detected in 17.7% of normal controls and 11.5% of patients. The frequencies of -137GG, GC and CC genotype were 67.3%, 30.0% and 2.7% in normal controls respectively, while in chronic hepatitis B patients were 78.8%, 19.5% and 1.7% respectively. The frequency of-137GG genotype in chronic hepatitis B groups was significantly higher than that in normal controls (x2=8.55, P=0.003 <0.05), whereas the frequencies of -607C/-137C and -607A/-137C haplotypes in chronic hepatitis B groups were significantly lower than that in normal controls. The association between genotypes of IL-18 promoter region polymorphisms and HBV copies showed that the frequency of -607AA genotype in high HBV-DNA copies groups was lower than that in low HBV-DNA copies groups (x2=6.03, P=0.014 <0.05). CONCLUSION: The polymorphisms of the promoter region of IL-18 gene at position -607 and -137 are closely associated with susceptibility to chronic hepatitis B. The people with allele C at position -137 in the promoter of IL-18 gene may be protected against HBV infection; moreover AA genotype at position -607 may be closely linked to inhibit HBV-DNA replication. These findings give some new clues to the study of pathogenesis of chronic hepatitis B.     

Correlation of interleukin-18 gene polymorphism with the susceptibility of condyloma acuminatum in Chinese population

Host immunogenetic setting is involved in the regulation of human papillomavirus (HPV) infection and development of condyloma acuminatum (CA). We investigated the correlation of two common single nucleotide polymorphisms (SNPs) (?607C/A and ?137G/C) of IL-18 with the susceptibility of CA in a large Chinese cohort. Out of 408 CA patients analyzed, 300 had HPV infection transmitted through sexual contact (SC) and 108 through non-sexual contact (NSC). In addition, 360 healthy volunteers were enrolled as controls. SNPs at positions ?607C/A and ?137G/C in IL-18 promoter were analyzed. Comparing CA patients to healthy controls, no dominant relevance was found between the IL-18 promoter ?607 C/A or ?137G/C polymorphisms and the CA disease either identified genotypically (p > 0.05) or by allelically (p > 0.05). However, the IL-18 promoter ?137G/C polymorphism genotype and allele frequencies in the NSC CA group, but not between in the SC group, were significantly higher than in the controls. There was no dominant relevance between IL-18-607C/A polymorphism genotype and allele frequencies among SC, NSC CA patients, and controls. Our study demonstrates that polymorphism ?137G/C in IL-18 promoter is significantly correlated with risk of CA in NSC patients.     

Association of IL-18 promoter polymorphisms with predisposition to Type 1 diabetes.

AIMS: IL-18, a potent IFN-gamma-inducing cytokine, is capable of polarizing the immune response to a Th1 phenotype. Recent studies have demonstrated an association between single-nucleotide polymorphisms located at positions -607 (A/C) and -137 (C/G) in the promoter region of IL-18 gene and Type 1 diabetes. The aim of the present study was to determine whether the same polymorphisms of the gene were associated with Type 1 diabetes in Iranians. METHODS: In 112 patients with Type 1 diabetes and 194 non-diabetic control subjects, these two single-nucleotide polymorphisms were analysed by sequence-specific PCR. RESULTS: Allele and genotype frequencies of the IL-18 gene polymorphisms were similar in the whole group of Type 1 diabetic patients and controls. However, categorizing patients according to age at onset of diabetes revealed a significant difference in distribution of the genotypes at position -137 between patients with older age at onset (> 15 years) (GG 49%, GC 34%, CC 17%) and control subjects (GG 57.7%, GC 36.6%, CC 5.7%) (P = 0.027). Frequency of the C allele at position -137 was significantly higher in these patients than in controls (P = 0.038). Moreover, there was an association between -607AA/-137CC genotype combination and susceptibility to Type 1 diabetes in this subgroup of patients (pc = 0.027). CONCLUSIONS: The results of this study show that polymorphisms of IL-18 promoter confer susceptibility to Type 1 diabetes in Iranian individuals with onset at older ages. Further investigations are necessary to clarify the effect of IL-18 variants on immune regulation.     

CD14基因-159C／T位点多态性对哮喘患者血浆IL-5的影响

目的探讨CD14基因-159C／T位点多态性和支气管哮喘（哮喘）的相关性及其对血浆IL-5的影响。方法选择正常对照组和哮喘组各150例,取外周血离心后,用酶联免疫吸附试验法测定血浆IL-5,用限制性片段长度多态性-聚合酶链反应方法检测CD14基因-159C／T位点多态性分布。结果对照组和哮喘组等位基因C、T分布有统计学差异（Х^2=10．82,P〈0．01）,C等位基因与哮喘相关（C／T的OR=1．73,95％CI=1．25—2．39,P〈0．01）,两组基因型（TT、CT、CO）频率分布有统计学差异（r=9．73,P〈0．01）;同组内C等位基因携带者血浆IL-5高于非携带者,以CC基因型最高;同一基因型哮喘组IL-5高于对照组。结论CD14基因启动子-159位点多态性与哮喘相关,C等位基因与血浆IL-5升高相关。     

肝脂酶基因启动子-514C／T多态性与糖尿病慢性肾脏疾病的相关性研究

目的探讨肝脂酶（HL）基因启动子区-514C／T多态性与糖尿病慢性肾脏疾病（CKD）的相关性。方法纳入T2DM患者（T2DM组）164例,根据UAlb水平再分为CKD亚组（CKD,n=108）和无CKD亚组（CKD0,n=56）;另选健康对照者（NC组）91名。运用限制性片段长度多态性（PCR-RFLP）技术对各组HL基因启动子区-514C／T多态性进行检测,并比较各组间基因型和等位基因频率及相关资料。结果（1）CKD亚组C／T＋T／T基因型和T等位基因频率高于CKD0亚组（P〈0．05）;（2）NC组与T2DM组间基因型和等位基因频率差异无统计学意义（P〉0．05）;（3）T2DM组中C／T＋T／T基因型患者TG水平高于C／C基因型患者（P〈0．05）;（4）Logistic回归分析表明,HL基因启动子区514C／T基因多态性与CKD相关。结论HL基因启动子区=514T等位基因可能是CKD发生的遗传易感因素。     

白细胞介素-18启动子-137G/C基因多态性和血浆IL-18含量与急性脑梗死的相关性

目的探讨白细胞介素-18( interleukin-18,IL-18)基因启动子- 137G/C多态性及血浆IL-18含量和脑梗死的相关性。方法入选北方地区汉族急性脑梗死患者218例,以年龄和性别相匹配的218名汉族健康体检者作为对照组。采用酶联免疫吸附法检测血浆IL.-18含量,应用序列特异性引物-聚合酶链反应技术检...     

TNF-α启动子基因多态性与强直性脊柱炎的易感性

目的探讨汉族人群肿瘤坏死因子-α（tumour necrosis factor-α,TNF-α）启动子基因多态性与强直性脊柱炎（ankylosing spondylitis,AS）易感性的相关性。方法设计一对TNF-α启动子基因引物,在包含整个TNF-α启动子的一段区域PCR扩增一1256bp片段,分别从5’-端和3’-端各测序500多个碱基序列,对83例AS患者和200名正常人TNF-α启动子全长1053bp序列直接测序。结果在AS组和对照组TNF-α启动子区域观察到5个单核苷酸多态性（single nucleotide polymorphisms,SNPs）位点存在明显的基因多态性,分别是-863C→A（rs1800630）、-857C→T（rs1799724）、-308G→A（rs1800629）、-245C→T（rs4987027）和-238G→A（rs361525）位点。各位点基因型频率：-863位AS组CA型20.5%,对照组CA型14.5%、AA型2.5%;-857位AS组CT型50.6%、TT型6.0%,对照组CT型24.5%、TT型3.5%;-308位AS组GA型3.6%、AA型2.5%,对照组GA型10.5%、AA型3.0%;-245位AS组CT型2.4%、TT型1.2%,对照组CT型1.5%;-238位AS组GA型4.8%,对照组GA型4.0%。-857位两组间差异具有统计学意义（P〈0.05）。结论TNF-α调控区域-857位点C→T等位基因变异显著增多,可能与强直性脊柱炎的易感性相关。