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IL-12基因多态性及相关炎症因子血浆水平与慢性HCV感染及治疗应答关系的研究

发布时间:2018-05-08 22:15

  本文选题:肝炎 + 丙型 ; 参考:《河北医科大学》2014年硕士论文


【摘要】:目的:丙型肝炎病毒(hepatitis C virus,HCV)是慢性肝病的主要致病因素,目前感染者在全球达1.8亿,感染率约为3%,我国人群抗-HCV阳性率为3.2%。丙型肝炎慢性化率为75%-85%,其中20%进展为肝硬化,肝癌发生率为1%-4%,严重危害人类健康和生命。目前尚无预防HCV感染的有效疫苗,临床标准治疗方案为干扰素联合利巴韦林,但其疗程较长,副作用大,持续病毒学应答(sustained virological response,SVR)率仅为38%-60%,仍有很大一部分患者病毒感染持续存在。HCV致病机制复杂,研究发现,HCV感染的不同临床转归与某些细胞因子基因多态性相关。此外,机体的免疫状态与慢性HCV感染/病毒学应答的关系密切。与其他病毒感染一样,HCV感染诱导激活了非特异性免疫应答和特异性免疫应答,在诱导和激活HCV特异性细胞免疫应答中,Th1细胞扮演着重要的角色。 方法:选择2012年1月~2013年9月在河北医科大学第三医院、石家庄市五院、邢台市人民医院、邯郸市传染病院住院及门诊慢性丙型肝炎(chronic hepatitis C,CHC)患者256例,分别进行IL-12基因多态性与相关因子的表达与疾病进展及治疗应答的关系的研究。 1IL-12rs3212227基因多态性与HCV感染的关系CHC患者256例,健康体检者129例作为对照,应用TaqMan探针法检测IL-12rs3212227位点基因多态性,分析CHC患者IL-12B等位基因、基因型分布与健康人群之间的差异。 2血浆IL-12、IL-10、IFN-γ水平与HCV感染状况及治疗应答关系的研究CHC患者52例,年龄在18~65岁,干扰素联合利巴韦林治疗,疗程为48周。另外选择年龄、性别匹配的健康体检者40例作为对照组,自发清除者40例,采用酶联免疫吸附法(ELISA)检测对照组、自发清除组及CHC患者治疗前、治疗12周和治疗结束后随访24周时血浆IL-12、IL-10、IFN-γ水平,分析CHC患者与健康人群和自发清除者血浆IL-12、IL-10、IFN-γ之间的差异; 结果: 1IL-12B基因多态性检测 CHC患者与健康对照等位基因A/C分布及基因型AA(32%vs38%)、AC(48%vs42%)、CC(20%vs20%)分布比较均无统计学意义(χ2=0.573,P=0.449)。256例CHC患者中95例进行了基因型检测,HCV基因1型与2型CHC患者等位基因A/C分布及基因型AA(37%vs20%)、AC(45.2%vs50%)、CC(17.8%vs30%)分布比较均无统计学意义(χ2=2.645, P=0.267)。随访结束的患者中,100例获得SVR,60例未获得SVR,获得SVR和未获得SVR患者等位基因A/C分布及基因型AA(37%vs27.4%)、AC(45%vs51.6%)、CC(18%vs21%)分布差异均无统计学意义(χ2=1.582, P=0.453)。 2IL-12、IL-10、IFN-γ血浆水平的变化 CHC患者抗病毒治疗前基线血浆IL-12含量与健康对照组及自发清除组相比差异均具有统计学意义(P 0.001),自发清除组与健康对照组相比差异无统计学意义(P0.05)。获得SVR与未获得SVR患者相比,在基线、治疗12周及治疗结束后随访24周时获得SVR患者IL-12水平显著高于未获得SVR组(P 0.001),且在治疗过程中呈上升趋势(P 0.001);未获得SVR患者在不同时间点IL-12血浆水平差异无统计学意义(P0.05)。CHC患者抗病毒治疗前基线和自发清除组血浆IL-10含量均明显高于健康对照组(P 0.001)。获得SVR与未获得SVR患者相比,,基线、治疗12周及治疗结束后随访24周获得SVR显著低于未获得SVR患者(P 0.01,P 0.05,P 0.001),两组在治疗过程中血浆IL-10含量差异均无统计学意义(P0.05)。CHC患者抗病毒治疗前基线血浆IFN-γ含量与健康对照组和自发清除组相比差异有统计学意义(P 0.001),自发清除组血浆IFN-γ含量显著高于健康对照组(P 0.01);获得SVR与未获得SVR患者相比,在治疗12周及治疗结束后随访24周时获得SVR显著高于未获得SVR患者(P 0.001);获得SVR患者在治疗过程中,IFN-γ含量呈上升趋势(P 0.001);未获得SVR患者在不同时间点IFN-γ血浆水平差异无统计学意义(P0.05)。 结论: 1IL-12B基因多态性与HCV感染和预后可能无明确关系。 2CHC患者血浆IL-12和IFN-γ含量在抗病毒治疗过程中升高,从而增强抗病毒免疫反应,清除体内的HCV,易获得SVR。 3血浆IL-10水平可能为慢性HCV感染病毒自发清除的预测指标之一。
[Abstract]:Objective: hepatitis C virus (HCV) is the main pathogenic factor of chronic liver disease. The infection rate is 180 million in the world and the infection rate is about 3%. The anti -HCV positive rate of the population in our country is 75%-85%, of which 20% is cirrhosis, and the incidence of liver cancer is 1%-4%, which seriously endangers human health. At present, there is no effective vaccine to prevent HCV infection. The clinical standard treatment scheme is interferon combined with Leigh Bhave Lin, but its course is long, the side effect is large and the rate of sustained virological response (SVR) is only 38%-60%. There are still a large part of the patient with the complicated pathogenesis of.HCV. In addition, the immune state of the body is closely related to the chronic HCV infection / virological response. As with other viral infections, the HCV infection induces the activation of non specific immune response and specific immune response, and the induction and activation of HCV specific cells in the induction and activation of HCV. In the immune response, Th1 cells play an important role.
Methods: to select 256 cases of chronic hepatitis C (chronic hepatitis C, CHC) patients in the Third Hospital of Hebei Medical University, the fifth hospital of Shijiazhuang, Xingtai People's Hospital, Xingtai People's Hospital, Handan infectious hospital and the patients with chronic hepatitis C (CHC) in the hospital of Shijiazhuang, January 2012, respectively, to express the expression of IL-12 gene polymorphism and related factors, and the relationship between the disease progression and the response to the treatment. A study of the Department.
1IL-12rs3212227 gene polymorphism was associated with HCV infection in 256 cases of CHC patients and 129 healthy subjects as control. TaqMan probe method was used to detect the polymorphism of IL-12rs3212227 loci, and the IL-12B alleles of CHC patients were analyzed, and the difference between genotype distribution and healthy population was found.
2 study on the relationship between plasma IL-12, IL-10, IFN- gamma and HCV infection status and response to treatment response in CHC patients, 52 cases of CHC, age at 18~65 years, interferon combined with Leigh Bhave Lin treatment, for 48 weeks. In addition, 40 cases of sex matched healthy persons were selected as control group, 40 cases were spontaneous cleaning, and enzyme linked immunosorbent assay (ELISA) was used to test control. Group, spontaneous scavenging group and CHC patients were treated for 12 weeks and IL-12, IL-10, IFN- gamma levels after 24 weeks of follow-up after treatment. The difference between CHC patients and IL-12, IL-10, IFN- gamma in healthy and spontaneous scavengers was analyzed.
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