Ghrelin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:2018-05-31 10:40
本文選題:Ghrelin基因 + 慢性乙型肝炎; 參考:《廣西醫(yī)科大學(xué)》2014年碩士論文
【摘要】:目的:Ghrelin作為人類生長激素釋放肽,不僅在調(diào)節(jié)各種生理代謝活動發(fā)揮作用,而且在肝炎發(fā)生發(fā)展中具有抗炎、抗纖維化、保護(hù)肝臟組織的作用。本研究通過探討廣西人群中g(shù)hrelin基因rs27647(-604G/A)、rs26311(-1062G C)、rs34911341(Arg51Gln)、rs696217(Leu72Met)四個位點(diǎn)基因多態(tài)性與HBV背景下慢性肝炎(CHB)、肝硬化(LC)、肝癌(HCC)發(fā)生發(fā)展過程中的遺傳易感性,獲得有意義的基因位點(diǎn)和單倍型。 方法:隨機(jī)選取健康體檢者167例作為對照組,篩選來自廣西地區(qū)HBV相關(guān)性肝炎176例、肝硬化106例、肝癌151例。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ghrelin基因rs27647、rs26311、rs34911341、rs696217四個位點(diǎn)單核苷酸多態(tài)性,并利用DNA直接測序法驗(yàn)證與PCR-RFLP的符合度,計(jì)算其基因型及等位基因頻率。采用ELISA法檢測各組對應(yīng)的ghrelin血清水平。應(yīng)用在線軟件檢驗(yàn)各位點(diǎn)的哈溫平衡;蛐图暗任换蝾l率在病例組與對照組之間的分布差異運(yùn)用卡方檢驗(yàn)分析。采用Logistic回歸分析校正性別和年齡混雜因素,計(jì)算OR值和95%CI,篩選出獨(dú)立的易感與保護(hù)基因型和等位基因。采用方差分析比較對照組與病例組間血清ghrelin水平差異。統(tǒng)計(jì)分析采用SPSS16.0軟件計(jì)算分析, SHEsis在線軟件進(jìn)行單倍型分析。 結(jié)果: 1.對照組和病例組ghrelin基因四個位點(diǎn)的基因型頻率在病例組和對照組中均符合哈-溫平衡,具有群體代表性(P0.05)。 2.Ghrelin基因rs27647位點(diǎn)有TT、TC、CC三種基因型。三種基因型及其等位基因在各病例組與對照組分布頻率差異無統(tǒng)計(jì)學(xué)意義。Logistic回歸分析校正年齡、性別因素后,以TT基因型作為參照,,TC和CC基因型未發(fā)現(xiàn)與CHB、LC、HCC的發(fā)病風(fēng)險(xiǎn)有關(guān)(P0.05)。以T等位基因?yàn)閰⒄,C等位基因與CHB、LC、HCC的發(fā)病風(fēng)險(xiǎn)無相關(guān)性,提示rs27647位點(diǎn)多態(tài)性與廣西人群CHB、LC、HCC的發(fā)病風(fēng)險(xiǎn)無相關(guān)性。 3.Ghrelin基因rs26311位點(diǎn)有GG、GC、CC三種基因型。三個基因型及其等位基因在各病例組與對照組分布頻率差異無統(tǒng)計(jì)學(xué)意義。Logistic回歸分析校正年齡、性別因素后,以GG基因型為參照,GC基因型增加了LC的患病風(fēng)險(xiǎn)(P=0.044,OR=1.671,95%CI:1.013~2.757);顯性模型(GC+CCvs. GG)增加了LC的患病風(fēng)險(xiǎn)(P=0.034,OR=1.674,95%CI:1.040~2.696)。CC基因型和C等位基因未發(fā)現(xiàn)與LC的患病風(fēng)險(xiǎn)相關(guān)。GC、CC基因型和C等位基因未發(fā)現(xiàn)與廣西人群CHB、HCC的患病風(fēng)險(xiǎn)相關(guān)。 4.Ghrelin基因rs34911341位點(diǎn)只有CC、CT兩種基因型。只在對照組出現(xiàn)了1個雜合子CT基因型,其余全為CC基因型。 5. Ghrelin基因rs696217位點(diǎn)有GG、GT、TT三種基因型,三個基因型及其等位基因在各病例組與對照組分布頻率的差異無統(tǒng)計(jì)學(xué)意義。Logistic回歸分析校正年齡、性別因素后,以GG基因型作為參照,GT和TT基因型未發(fā)現(xiàn)與CHB、LC、HCC的發(fā)病風(fēng)險(xiǎn)有關(guān)(P0.05)。以G等位基因?yàn)閰⒄,T等位基因與CHB、LC、HCC的發(fā)病風(fēng)險(xiǎn)無相關(guān)性,提示rs696217位點(diǎn)多態(tài)性與廣西人群CHB、LC、HCC的發(fā)病風(fēng)險(xiǎn)無相關(guān)性。 6.對性別分層后,在男性人群中,ghrelin基因rs26311位點(diǎn)在男性人群中,GC基因型與LC患病風(fēng)險(xiǎn)無關(guān),而顯性模型與LC的患病風(fēng)險(xiǎn)有關(guān)(P=0.042,OR=1.792,95%CI=1.019~2.933),C等位基因與LC的患病風(fēng)險(xiǎn)有關(guān)(P=0.040,OR=1.416,95%CI=1.017~1.972);而rs26311位點(diǎn)在女性人群中各基因型和等位基因均與LC的患病風(fēng)險(xiǎn)無關(guān)。rs26311位點(diǎn)在男性人群還是女性人群中,均與廣西人群CHB、HCC的發(fā)病風(fēng)險(xiǎn)無關(guān)。另外,ghrelin基因rs27647和rs696217位點(diǎn)的多態(tài)性無論在男性人群還是女性人群中,均與廣西人群CHB、LC、HCC的發(fā)病風(fēng)險(xiǎn)無關(guān)。各SNP位點(diǎn)在對照組、CHB組、LC組和HCC組中男女基因型頻率未發(fā)現(xiàn)有統(tǒng)計(jì)學(xué)差異。 7.本研究167例廣西地區(qū)對照組的ghrelin基因rs27647、rs26311、rs34911341、rs696217四個位點(diǎn)基因型和等位基因頻率與國際人類基因組單體型圖(HapMap)計(jì)劃中報(bào)道的亞洲地區(qū)人群結(jié)果相似(P0.05);而與白種人群,尼日利亞巴丹約魯巴人群基因頻率分布差異較顯著(P0.05)。 8. Ghrelin基因rs27647、rs26311、rs696217三個位點(diǎn)CTG單倍型是CHB的保護(hù)因素(P=0.0384,OR=0.706,95%CI=0.507~0.982),而CTT單倍型是CHB危險(xiǎn)因素(P=0.0223,OR=1.974,95%CI=1.092~3.568)。 9.對照組與病例組間血清ghrelin水平差異有統(tǒng)計(jì)學(xué)意義(P0.05)。 結(jié)論: 1. Ghrelin基因rs26311位點(diǎn)GC基因型和顯性模型可能是廣西地區(qū)HBV背景下LC患病的危險(xiǎn)因素。在性別分層后,rs26311位點(diǎn)顯性模型和C等位基因可能是廣西地區(qū)HBV背景下男性人群LC患病危險(xiǎn)因素。 2.廣西地區(qū)人群Ghrelin基因rs27647、rs26311、rs34911341、rs696217四個位點(diǎn)基因型和等位基因頻率與亞洲地區(qū)人群結(jié)果相似;而與白種人群,尼日利亞巴丹約魯巴人群基因頻率分布差異較顯著。 3. CTG單倍型是CHB的保護(hù)因素,而CTT單倍型是CHB的危險(xiǎn)因素。
[Abstract]:Objective: Ghrelin, as a human growth hormone releasing peptide, not only plays a role in regulating various physiological metabolic activities, but also has the effect of anti inflammation, anti fibrosis and protection of liver tissue in the development of hepatitis. This study explored the ghrelin gene rs27647 (-604G/A), rs26311 (-1062G C), rs34911341 (Arg51Gln), rs696217 in Guangxi population. (Leu72Met) genetic polymorphisms of four loci and genetic susceptibility to the development of chronic hepatitis (CHB), liver cirrhosis (LC) and liver cancer (HCC) under the background of HBV, and obtain meaningful gene loci and haplotypes.
Methods: 167 cases of healthy physical examination were selected as the control group. 176 cases of HBV related hepatitis from Guangxi, 106 cases of liver cirrhosis and 151 cases of liver cancer were screened. The single nucleotide polymorphisms of the four loci of ghrelin gene rs27647, rs26311, rs34911341 and rs696217 were detected respectively by the polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) technique. DNA direct sequencing was used to verify the compatibility with PCR-RFLP, to calculate the genotype and allele frequency. ELISA method was used to detect the level of the corresponding ghrelin serum. The distribution difference between the genotype and allele frequencies between the case group and the control group was tested by using the online software. Analysis. Logistic regression analysis was used to correct gender and age confounding factors, OR value and 95%CI were calculated and independent susceptibility and protective genotypes and alleles were screened. Variance analysis was used to compare the difference of serum ghrelin level between the control group and the case group. The statistical analysis was analyzed by SPSS16.0 software, and the haplotype was carried out by SHEsis online software. Analysis.
Result錛
本文編號:1959331
本文鏈接:http://sikaile.net/yixuelunwen/chuanranbingxuelunwen/1959331.html
最近更新
教材專著