C反应蛋白基因多态性与慢性牙周炎的相关性研究

目的 研究中国汉族人群中C反应蛋白(C-reactive protein,CRP)+1444C/T、CRP+1059G/C两种基因多态性与慢性牙周炎的关系,为进一步探讨CRP在牙周炎与冠状动脉粥样硬化性心脏病相关性中的作用和意义提供依据.方法 检测126例慢性牙周炎患者(CP组)和113名牙周健康或龈炎者(对照组)的牙周临床指数(附着丧失、探诊深度和探诊出血)、CRP水平及CRP+1059G/C、CRP+1444C/T基因多态性分布情况.结果 CP组中CRP+1059C等位基因的频率为6.7%(17/252);对照组4.9%(11/226),CP组与对照组之间的基因型分布和等位基因频率的分布差异均无统计学意义(0.250.5).结论 CRP+1059G/C、+1444C/T基因可能是CRP的功能性基因,尽管牙周炎与心血管疾病显著相关且CRP+1059G/C、+1444C/T与心血管疾病有相关性,但是这两个基因位点可能对中国汉族人群牙周炎患者的血清CRP水平影响不显著.     

C反应蛋白基因多态性与慢性牙周炎的相关性研究

Objective To investigate the relationship between C-reactive protein (CRP) + 1444C/T, CRP + 1059G/C polymorphisms and chronic periodontitis ( CP ) in a Han Chinese population. Methods Clinical periodontal parameters[ attachment loss( AL) probing depth(PD) and bleeding on probing(BOP) ] , and serum CRP levels were examined in CP patients (re = 126) and healthy subjects ( n = 113). Results The mean serum CRP level [ (1. 74 ± 1. 67) mg/L] was significantly higher in the CP group than in the control group [ (0. 57 ± 0. 39) mg/L] , P < 0. 001. In the control group, serum CRP levels were significantly lower in subjects with the CRP + 1059 GC and CC genotypes than those with the CRP +1059 GG genotype (P < 0.01). There was no significant difference between genotypes in the CP group. In CP and the control groups, serum CRP levels were significantly higher in subjects with the CRP + 1444 CT and TT genotypes compared to those with the CRP + 1444 CC genotype (P <0. 5). The percentage of CRP + 1059 C allele was 6. 7% (17/252) in the CP group and 4. 9% (11/226) in the control group. The percentage of CRP + 1444 T allele was 6. 3% (16/252) in the CP group and 5. 3% (12/226) in the control group (P > 0. 5). There was no significant difference between groups in both allele frequencies (P > 0. 5 ). The association of CRP + 1059G/C, CRP + 1444 C/T polymorphisms with CP was not found in a regression model ( P > 0. 5). Conclusions The presence of a CRP + 1059C-allele was associated with lower serum CRP levels and the presence of a CRP + 1444T-allele was associated with higher serum CRP levels. However, the data suggested that CRP + 1059G/C, CRP + 1444 C/T polymorphisms were not significantly associated with serum CRP levels of chronic periodontitis patients in ethnic Han Chinese.     

C反应蛋白基因多态性与牙周炎和冠心病相关性的研究进展

牙周炎和冠心病的本质均为感染和炎症,而C反应蛋白( C-reactive protein,CRP)作为一种炎症反应标志物,在牙周炎和冠心病的发生发展及其相互关系中发挥重要作用.众多研究均显示牙周炎有遗传背景.CRP有多达40个单核苷酸多态性位点,本文就CRP基因多态性与牙周炎和冠心病的相关性作一综述.     

C-反应蛋白+1059G/C单核苷酸多态性与侵袭性牙周炎的相关性研究

目的:初步分析C-反应蛋白(CRP)+1059G/C单核苷酸多态性与侵袭性牙周炎易感性之间的相关关系.方法:收集侵袭性牙周炎患者的颊黏膜拭子,采用Chelex-100法提取其DNA,然后应用PCR-RFLP法检测CRP+1059G/C的基因型分布,并与慢性牙周炎组及牙周健康对照组的基因型相比较,统计分析侵袭性牙周炎的发...     

C反应蛋白与牙周炎

血清C反应蛋白(CRP)是急性期蛋白的重要组成成分。牙周炎是微生物引起的炎症性疾病,其炎症刺激可导致机体发生急性期反应,引起患者血清CRP水平的升高。本文就CRP与牙周炎的关系作一综述。     

牙周炎与血清超敏C反应蛋白的相关性研究

目的探讨牙周炎与冠心病（CHD）传统危险因子的相关性,研究血清超敏C反应蛋白（hsCRP）在二者相关性中的可能作用。方法356例研究对象行牙周检查,得出社区牙周治疗需要量（CPITN）指数,根据CPITN分值将356例研究对象分为TN≤2、TN=3、TN=4共3组。3组人群均抽取空腹静脉血,检测血清hsCRP质量浓度和CHD常规血清学指标,用SPSS 16.0软件分析牙周状态、hsCRP和CHD常规血清学指标间的关系。结果TN≤2、TN=3、TN=4组的hsCRP质量浓度分别为（1.10±1.16）、（1.86±2.34）、（2.25±2.75）mg·L-1。与TN≤2组相比较,TN=3和TN=4组的hsCRP质量浓度升高（OR值分别为1.24和1.31）。hsCRP≥3.0 mg·L-1组的牙石沉积及深牙周袋检出率均高于hsCRP＜3.0 mg·L-1组,且有统计学意义（P＜0.05）。结论血清中的hsCRP质量浓度与牙周炎的严重程度有一定的相关性。     

C-反应蛋白基因多态性与慢性牙周炎伴Ⅱ型糖尿病易感性相关研究靠

目的:初步分析CRP基因多态性与慢性牙周炎伴Ⅱ型糖尿病易感性之间的关系.方法:收集慢性牙周炎伴Ⅱ型糖尿病患者及慢性牙周炎患者的颊黏膜拭子,采用Chelex-100法提取DNA,然后应用PCR-RFLP法检测CRP的基因型分布.并与牙周健康的对照组基因型对比,统计分析慢性牙周炎及Ⅱ型糖尿病的发病是否与CRP+1059G/C的基因多态性有关.结果:慢性牙周炎伴Ⅱ型糖尿病组、慢性牙周炎组与对照组的CRP+1059基因型分布差异无显著性(χ~2=0.223,P=0.994),等位基因频率的分布差异无显著性.3 组受试者中GG基因型最多, GC型次之, CC型最少.各基因型及等位基因频率分布均符合Hardy-Weinberg平衡.结论:本研究未发现中、重度慢性牙周炎,慢性牙周炎伴Ⅱ型糖尿病的易感性与CRP+1059G/C单核苷酸多态性有关.     

牙周炎患者血清超敏C反应蛋白的相关性研究

目的检测伴心血管因素的牙周炎患者及单纯牙周炎患者的血清超敏C反应蛋白,研究分析牙周炎与心血管疾病的相关关系。方法将92例牙周炎患者分为1组：51例伴心血管因素牙周炎组,2组：41例单纯牙周炎组。对照组：51例牙龈炎组。利用BNProspec特种蛋白免疫分析仪进行血清超敏C反应蛋白水平测定。结果两组牙周炎患者血清hs CRP水平明显高于牙龈炎对照组,差异有统计学意义（P〈0.05）。1组的血清hs CRP水平明显高于2组,差异有统计学意义（P〈0.05）。2组中、重度牙周炎患者的血清hs CRP水平明显高于轻度牙周炎患者,与附着丧失呈正相关关系,差异有统计学意义（P〈0.05）。1组轻、中、重度牙周炎患者血清hs CRP水平的差异无统计学意义（P〉0.05）,但中、重度牙周炎患者较轻度牙周炎患者多。1组的中、高度心血管疾病风险人数较2组的中、高度心血管疾病风险人数多,差异有统计学意义（P〈0.05）。结论伴心血管因素患者的牙周炎症程度较单纯牙周炎患者的重,血清hs CRP水平也较高。心血管疾病受牙周炎的影响,可使血清CRP进一步升高,并有可能加重牙周炎。两者之间可能相互影响。     

TNFA-308基因多态性与中国人群慢性牙周炎的相关性研究

目的：探讨TNFA～308基因多态性与慢性牙周炎易感性的关系。方法：收集63例重度慢性牙周炎（CP）患者、103例轻、中度慢性牙周炎患者及80例健康对照者的颊黏膜拭子,提取DNA,采用多聚酶链反应-限制性内切酶片段长度多态性（PCR—RFLP）法测定TNFA-308位点的基因多态性,实验结果输入SPSS10．0统计软件包处理,进行各组间基因型分布和等位基因频率的X^2检验,比较各组间基因型分布的差异。计算等位基因2的OR和95％可信区间,以确定等位基因2与牙周炎易感性的关系。结果：重度CP组、轻、中度CP组及健康对照组均以TNF1／1纯合子占优势,TNF1／2杂合子基因型次之,仅在轻、中度CP组检出1例TNF2／2纯合子基因型。TNFA-308／NcoI基因型分布及等位基因频率在3组间无显著性差异。结论：对此位点基因型是否对慢性牙周炎的易感性及进程预后产生影响。尚不能肯定,需要进一步的研究。     

C-反应蛋白基因多态性与相关疾病的研究进展

C-反应蛋白(CRP)是急性期蛋白中最敏感的指标.目前研究发现CRP基因多态性与许多系统性疾病有关,本文就CRP的生物学特征,影响CRP水平的因素,基因多态性在种族中的分布,及其与相关疾病的研究进展进行综述.     

Interleukin 10 gene promoter polymorphisms are associated with chronic periodontitis

BACKGROUND: Chronic periodontitis (CP) is characterized by an inflammation in the supporting tissues of the teeth caused primarily by bacterial infection. Interleukin 10 (IL10) is an anti-inflammatory cytokine whose genetic polymorphisms may influence the expression of the protein. Objective: In this study we investigated the hypothesis that single-nucleotide polymorphisms (SNPs) in the promoter of IL10 gene might be related to CP. MATERIALS AND METHODS: DNA was obtained from n=67 CP patients and n=43 control subjects. All studied individuals were non-smokers. The -1087 SNP was investigated by DNA sequencing, and the -819 and -592 SNPs by restriction fragment length polymorphism of PCR products. RESULTS: Frequencies of -819 and -592 SNPs showed differences between the control and CP groups. The ACC haplotype was more prevalent in the control group and the ATA haplotype more prevalent in the CP group. The ATA haplotype seemed to increase susceptibility to CP in women (odds ratio (OR)=2.57). The heterozygous haplotype GCC/ACC was predominant in the control group (OR=8.26; p=0.001). CONCLUSIONS: Specific haplotypes and SNPs in IL10 gene are associated with susceptibility to CP in Brazilian patients.     

TLR2/TLR4基因多态性与慢性牙周炎的相关性研究

目的:研究TLR2/TLR4基因单核苷酸多态性(single nucleotide polymorphisms,SNP)与慢性牙周炎的相关性.方法:从2009年1月至2011年4月,收集慢性牙周炎患者638例和对照组143例,其中中度牙周炎组196例,重度牙周炎组442例.抽取静脉血提取基因组DNA,采用TaqMan MGB探针法对TLR2rs13150331, rs1898830, rs3804100;TLR4 rs10759930, rs10983755, rs11536879, rs1927907, rs11536889,rs7873784共9个多态性位点进行基因型检测.分析基因型和等位基因频率、分布规律和单倍体型,探讨TLRs单核苷酸多态性与牙周炎基因遗传易感性的关系.结果:TLR4 rs11536889 (GG)基因型频率在重度牙周炎组患者中显著高于中度牙周炎组(P＜0.05).单倍型G-C-G (rs1927907- rs11536889- rs7873784)是牙周炎的危险因素之一,OR=1.449;95％ CI [1.052-1.995].结论:TLR4基因多态性与牙周炎的易感性有密切相关性,rs11536889(C/G)的变异与之相关联.单倍型G-C-G(rs1927907-rs11536889-rs7873784)可能是牙周炎进展的危险因素.     

Association between lactoferrin gene polymorphisms and aggressive periodontitis among Taiwanese patients

Background and Objective: A dramatic difference in the frequencies of the Lys/Arg single nucleotide polymorphism in the lactoferrin genotype between a small population of patients with localized juvenile periodontitis and healthy subjects has been reported. As the single nucleotide polymorphism could be associated with ethnicity, the present study aimed to investigate the association between polymorphisms of the lactoferrin gene and periodontitis. Material and Methods: Sixty‐five patients with aggressive periodontitis, 278 with chronic periodontitis and 88 healthy controls were genotyped for the Lys/Arg polymorphism of the lactoferrin gene at position 29 [reference sequence (rs) 1126478] in the N‐terminal alpha‐helical region. Results: The frequencies of the GG genotype and the G allele were highest in the aggressive periodontitis group, followed by the chronic periodontitis group and then the healthy controls. The frequency of the G allele was significantly higher in aggressive periodontitis and chronic periodontitis groups than in healthy controls (p = 0.0037 and 0.0212). Although the difference of the GG genotype distribution between subjects with chronic periodontitis and healthy controls did not reach significance, the distribution of genotypes between aggressive periodontitis and healthy controls was significantly different. The association of the gene polymorphism and aggressive periodontitis still existed, even after adjusting for age, gender and smoking status by logistic regression analysis (GG/AG+AA: odds ratio = 2.16, 95% confidence interval = 1.09–4.35, p = 0.0287). After the study, subjects were further stratified by their smoking status; the GG genotype was still significantly associated with the risk of aggressive periodontitis in the nonsmoking group (odds ratio = 2.69, p = 0.018). However, there were no statistical differences between chronic periodontitis vs. healthy controls and aggressive periodontitis vs. healthy controls in the smoking group. Conclusion: The present study revealed that the A/G polymorphism in the lactoferrin gene might be associated with aggressive periodontitis. The A allele might reduce the risk of development of aggressive periodontitis in a Taiwanese population. Our results also support the hypothesis that lactoferrin genetic polymorphisms could play a role in the risk for periodontitis separate from the smoking factor. The functionality of this gene’s polymorphisms has to be further elucidated.     

慢性重度牙周炎的CD14受体基因多态性研究

目的研究慢性重度牙周炎的发生、发展的遗传学倾向,探讨CD14受体基因中-159位点c-t多态性及-1359位点g-t多态性与慢性重度牙周炎的相关情况。方法选择发病组患者和对照组健康者,应用聚合酶链反应-限制性片断长度多态(PCR-RFLP)技术,测定慢性重度牙周炎患者CD14受体基因的多态分布并对它们与慢性重度牙周炎患者的相互关系进行探讨。结果①CD14受体基因中-159位点c-t的基因多态分布与慢性重度牙周炎患者无关联(P>0.05)。②CD14受体基因中-1359位点g-t的基因多态分布与慢性重度牙周炎患者有关联(P<0.05)。结论CD14受体基因中g(-1359)t的多态位点是慢性重度牙周炎患者的风险因子。     

RAGE基因多态性与2型糖尿病伴慢性牙周炎遗传易感性的相关研究

［摘要］ 目的 探讨晚期糖基化终产物受体(receptor for advanced glycation end products, RAGE)基因的5个SNP位点在2型糖尿病伴慢性牙周炎、单纯慢性牙周炎、健康对照北方汉族人群中分布的差异,从而研究RAGE基因是否为糖尿病和牙周炎可能的致病易感基因。方法 运用飞行时间质谱法检测19例2型糖尿病伴慢性牙周炎患者(DM组),22例单纯慢性牙周炎组(CP组)以及54例健康对照组(H组)全血基因组DNA中5个单核苷酸多态性(single nucleotide polymorphism, SNP)位点。结果 rs17846808、rs1800625、rs184003、rs2070600、rs3134940基因多态性在三组间分布无差异。DM组中的rs3134940 A/A（野生纯合子）基因型人群的龈沟出血指数(sulcus bleeding index,SBI)显著高于(A/G+G/G,杂合子和突变纯合子)基因型人群的SBI。CP组中的rs1800625 (T/C+C/C)和rs3134940 (A/G+G/G,杂合子和突变纯合子)基因型人群缺失牙数显著性增高。结论 RAGE基因并非2型糖尿病以及慢性牙周炎的易感基因。rs3134940 G等位基因可能在2型糖尿病伴慢性牙周炎进展过程中起到一定保护作用。     

白细胞介素-17基因多态性与侵袭性牙周炎的相关性研究

目的已有少量文献证实白细胞介素-17(interleukin-17,IL-17)基因多态性与多种免疫炎症性疾病相关。本研究旨在探索中国汉族人群中,IL-17A(rs2275913)和IL-17F(rs763780)位点单核苷酸多态性(single nucleotide polymorphisms,SNPs)与侵袭性牙周炎(aggressive periodontitis,Ag P)的相关性。方法采集87例Ag P、79例牙周健康者的外周静脉血,提取基因组DNA,采用多重SNa Pshot技术分析待测位点的基因多态性。结果 IL-17A(rs2275913)位点的基因型分布、IL-17F(rs763780)位点的基因型和等位基因分布在Ag P组和健康对照(healthy controls,C)组中差异均无统计学意义(P≥0.05)。IL-17A(rs2275913)位点在Ag P组中A等位基因频率显著高于健康对照组(54.0%vs.42.4%,P=0.034,OR=1.596,95%CI=1.034-2.463)。结论研究结果显示IL-17A(rs2275913)位点A等位基因可能是Ag P发病的危险因素,提示IL-17A(rs2275913)位点的多态性可能与中国汉族人群的Ag P易感性有关。