李舜法 黃建鋒 曾瑩等
[摘要] 目的 探討廣州番禺區(qū)漢族人群2型糖尿病與Preproghrelin基因rs96217位點單核苷酸多態(tài)性的關(guān)系。 方法 提取番禺漢族人群中非糖尿病的正常人和2型糖尿病患者的DNA,采用PCR-RFLP,分析對照組和T2DM組Preproghrelin基因rs96217位點的基因型及組間基因型、等位基因頻率分布的差異。 結(jié)果 對照組116例樣本中,CC 96例、AC 20例, AA 0例;基因型頻率分別為:82.8%、17.2%、0。T2DM組118例樣本中,CC 89例、AC 24例、AA 5例,基因型頻率分別為:75.4%、20.3%、4.3%。組間基因型和等位基因頻率差異無統(tǒng)計學(xué)意義。 結(jié)論 廣州番禺區(qū)漢族人群2型糖尿病與Preproghrelin基因rs96217位點單核苷酸多態(tài)性之間未見顯著相關(guān)性。但T2DM組中發(fā)現(xiàn)AA基因型,而對照組未顯,原因有待進(jìn)一步研究。
[關(guān)鍵詞] Preproghrelin基因;單核苷酸多態(tài)性;2型糖尿病;聚合酶鏈反應(yīng)-限制性片段長度多態(tài)分析技術(shù)
[中圖分類號] R587.1 [文獻(xiàn)標(biāo)識碼] A [文章編號] 2095-0616(2015)15-09-04
[Abstract] Objective To study the relationships between type 2 diabetes mellitus (T2DM) in Han ethnics of Panyu and SNP rs96217 of preproghrelin gene. Methods Extraction DNA of 116 non-T2DM healthy individuals (the control group) and 118 T2DM individuals (the T2DM group) from populations of Han ethnics in Panyu, target gene segments were detected using PCR-RFLP in order to analyze genotypes of SNP rs96217 of preproghrelin gene, and to compare the differences of genotypic and allelic frequencies between the two groups. Results In the control group, the genotypes CC and AC had 96 and 20 individuals, but genotype AA wasnt find. Their genotypic frequencies were 82.8%,17.2% and 0%, respectivel. In the T2DM group, the genotypes CC, AC and AA were detected in 89, 24 and 5 cases, Their genotypic frequencies were 75.4%、20.3% and 4.3%, respectively. there were no statistical significance in the difference of genotypic and allelic frequencies between the control group and the T2DM group. Conclusion There are no significant relationships between T2DM in Han ethnics of Panyu and SNP rs96217 of preproghrelin gene. However, genotype AA was detected in the T2DM group but not in control, which suggested that allele A may play certain roles in T2DM development. Further investigations certainly would be worth pursuing.
[Key words] Preproghrelin gene; Single nucleotide polymorphism(SNP); Type 2 diabetes mellitus; Polymerase chain reaction–restriction fragment length polymorphism(PCR-RFLP)
糖尿病是嚴(yán)重危害人類健康的主要慢性疾病之一,目前全球糖尿病患者超過 1.7 億,而且患病率還在逐年增加。糖尿病患者中約90%為2型糖尿病[1]。2型糖尿?。╰ype 2 diabetes mellitus,T2DM)是一種以高血糖為主要特征的代謝紊亂性疾病[2-3],其病因及發(fā)病機(jī)制一般認(rèn)為與胰島素抵抗有關(guān)[4]。
血糖控制不佳所致的各種并發(fā)癥基因在2型糖尿病的發(fā)生中起著關(guān)鍵作用,但目前還不能明確鑒定出2型糖尿病由那個具體的基因決定[5],因而篩選2型糖尿病的候選基因是鑒定其易感基因和研究其發(fā)病機(jī)制的主要方法之一[6]。國外有研究報道:Preproghrelin基因是2型糖尿病的候選基因之一,而其rs96217位點單核苷酸多態(tài)性對胰島素抵抗具有保護(hù)作用[7],但單核苷酸多態(tài)性與2型糖尿病發(fā)生的關(guān)系未有定論。國內(nèi)有報道[8]:Preproghrelin基因Leu72Met多態(tài)性與上海地區(qū)漢族人2型糖尿病無顯著相關(guān)性,但可能存在延緩2型糖尿病微量蛋白尿繼續(xù)發(fā)展的作用。
隨著我國社會經(jīng)濟(jì)條件的改善,糖尿病患病率也在逐年迅速增加,已成為繼腫瘤、心腦血管疾病后第3位嚴(yán)重危害人民健康的慢性非傳染性疾病[9]。T2DM已成為威脅廣州地區(qū)人群健康的的一個嚴(yán)重的社會問題,表現(xiàn)出發(fā)病人數(shù)多、年輕化等特點。因此從遺傳因素的角度去尋找發(fā)病機(jī)制,為預(yù)防和治療提供資料尤為重要和急迫。課題組前期研究曾以廣州主城區(qū)的越秀、海珠、天河三區(qū)的人群作為研究對象,未涉及番禺區(qū)人群,為了較全面的了解Preproghrelin基因多態(tài)性與廣州地區(qū)人群2型糖尿病之間的關(guān)系,課題組選擇了番禺區(qū)人群以擴(kuò)大樣本量。本項目的研究目的是為了探究Preproghrelin基因rs96217位點單核苷酸多態(tài)性與番禺區(qū)人群2型糖尿病的關(guān)系,為闡明2型糖尿病的發(fā)生、發(fā)展機(jī)制提供理論依據(jù)。