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缺氧誘導(dǎo)因子1基因多態(tài)性與HBV相關(guān)性肝炎、肝硬化、肝癌的遺傳易感性研究

發(fā)布時間:2018-04-30 19:10

  本文選題:缺氧誘導(dǎo)因子 + 基因多態(tài)性; 參考:《廣西醫(yī)科大學(xué)》2014年碩士論文


【摘要】:目的:缺氧誘導(dǎo)因子(Hypoxia inducible factor-1,HIF-1)作為缺氧環(huán)境下誘導(dǎo)的主要的核轉(zhuǎn)錄激活因子,在機體應(yīng)對缺氧的過程中發(fā)揮了重要作用。本實驗主要通過對HIF-1α基因rs11549465和rs11549467兩個位點基因多態(tài)性的研究,探討在廣西地區(qū)人群中HIF-1α的基因型在HBV相關(guān)性肝炎、肝硬化、肝癌人群中的分布,以及HIF-1α的基因多態(tài)性與HBV相關(guān)性肝炎、肝硬化、肝癌的遺傳易感性的關(guān)系。 方法:篩選首次入院的HBV相關(guān)性肝臟疾病患者共442例作為病例組,其中包括153例慢性乙型肝炎患者(CHB組),132例乙型肝炎肝硬化患者(LC組),157例HBV相關(guān)性肝癌患者(HCC組),同時選取健康體檢者173例作為對照組。應(yīng)用聚合酶鏈反應(yīng)-限制性片段長度多態(tài)性(PCR-RFLP)技術(shù)分別檢測HIF-1α基因rs11549465、rs11549467兩個位點的基因多態(tài)性,并利用DNA直接測序法驗證與PCR-RFLP法檢測結(jié)果的吻合度,計算其基因型和等位基因頻率。采用擬和優(yōu)度χ2檢驗對兩個SNP位點進行哈-溫平衡檢測,并運用logistic回歸分析校正性別、年齡等混雜因素,計算OR和95%CI,進而分析兩個SNP位點基因多態(tài)性和HBV相關(guān)性肝炎、肝硬化、肝癌遺傳易感性的關(guān)系。運用SHEsis軟件分別對HIF-1α基因兩個SNP位點進行單倍型分析。 結(jié)果: 1.對照組與CHB組、LC組、HCC組各組的性別構(gòu)成比較差異無統(tǒng)計學(xué)意義(P0.05),然而各組在年齡構(gòu)成比較時發(fā)現(xiàn),對照組與LC組和HCC組年齡比較差異均有統(tǒng)計學(xué)意義(P 0.05),同時CHB組與LC組和HCC組年齡比較差異亦有統(tǒng)計學(xué)意義(P0.05),其余的兩兩比較則差異均無統(tǒng)計學(xué)意義(P0.05)。HIF-1αrs11549465和rs11549467兩個SNP位點中,除rs11549465位點中的肝癌組(P0.05)外,其余組的基因型分布頻率均符合哈-溫平衡定律(P0.05)。 2. HIF-1αrs11549465位點發(fā)現(xiàn)CC、CT和TT三種基因型。將野生型CC基因型和等位基因C分別作為參照,通過logistic回歸分析校正年齡和性別混雜因素后發(fā)現(xiàn),CT基因型在CHB與HCC組比較中差異有統(tǒng)計學(xué)意義(P0.05),,其余組包括等位基因組比較差異均無統(tǒng)計學(xué)意義(P0.05)。此外在男性人群亦發(fā)現(xiàn)同樣的結(jié)果。說明CHB可能與HCC患病有相關(guān)性。 3. HIF-1αrs11549467位點發(fā)現(xiàn)GG、GA和AA三種基因型。將野生型GG基因型和等位基因G分別作為參照,通過logistic回歸分析校正年齡和性別混雜因素后發(fā)現(xiàn),GA基因型和AA基因型與各組比較差異均無統(tǒng)計學(xué)意義,與等位基因A相比差異亦無統(tǒng)計學(xué)意義(P0.05)。 4.對性別進行分層分析后發(fā)現(xiàn)HIF-1α中rs11549465和rs11549467兩個位點無論是在廣西男性人群中,還是在廣西女性人群中,其基因型和等位基因與CHB、LC以及HCC患病風(fēng)險均未發(fā)現(xiàn)相關(guān)性。 5.將上述兩個SNP位點進行單倍型構(gòu)建,結(jié)果發(fā)現(xiàn)在對照組與HCC組構(gòu)建的CA、CG單倍型中差異有統(tǒng)計學(xué)意義(P=0.025,OR=0.416;P=0.008,OR=2.327),在CHB組與HCC組構(gòu)建的CG、TG單倍型中差異亦有統(tǒng)計學(xué)意義(P=0.007,OR=2.408;P=0.020,OR=0.315) 結(jié)論: 1. HIF-1rs11549465位點的CT基因型可能降低CHB發(fā)展為HCC的發(fā)病風(fēng)險。而rs11549467位點的多態(tài)性與HBV相關(guān)性肝炎、肝硬化、肝癌的患病風(fēng)險無關(guān)。 2. rs11549465和rs11549467兩個位點構(gòu)建的單倍型分析中發(fā)現(xiàn)CA單倍型可能降低HCC的患病風(fēng)險,而CG單倍型可能增加HCC的患病風(fēng)險。CG單倍型亦可增加由CHB發(fā)展為HCC的患病風(fēng)險,而TG單倍型則可降低CHB發(fā)展為HCC的患病風(fēng)險。
[Abstract]:Objective: Hypoxia inducible factor-1 (HIF-1), as a major nuclear activator in anoxic environment, plays an important role in the process of coping with hypoxia. This experiment is mainly based on the study of the two gene polymorphisms of the HIF-1 alpha gene rs11549465 and rs11549467, and the study of people in Guangxi region. The genotype of HIF-1 alpha in the group is distributed in HBV related hepatitis, cirrhosis, liver cancer, and the genetic polymorphisms of HIF-1 A and the genetic susceptibility to HBV related hepatitis, cirrhosis, and liver cancer.
Methods: 442 cases of HBV related liver disease were selected for the first time, including 153 patients with chronic hepatitis B (group CHB), 132 cases of hepatitis B cirrhosis (group LC), 157 patients with HBV related liver cancer (group HCC), and 173 healthy persons as the control group. The polymerase chain reaction restriction was used. The fragment length polymorphism (PCR-RFLP) technique was used to detect the gene polymorphism of the two loci of the HIF-1 alpha gene rs11549465 and rs11549467, and the DNA direct sequencing was used to verify the anastomosis with the results of the PCR-RFLP assay, and to calculate the genotype and allele frequency of the allele. Two SNP loci were detected by the pseudo sum chi 2 test. The logistic regression analysis was used to correct the sex, age and other confounding factors, calculate OR and 95%CI, and then analyze the relationship between the genetic polymorphisms of two SNP loci and the genetic susceptibility to hepatitis, cirrhosis and liver cancer associated with HBV. Using the SHEsis software, the haplotype analysis of the two SNP loci of the HIF-1 a gene was performed respectively.
Result錛

本文編號:1825811

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