史雷忠+錢志宏+李銀福+倪悅+陳國(guó)琴
摘 要 目的:探討中國(guó)常州地區(qū)人群白介素-10(IL-10)基因1082G/A多態(tài)性與不穩(wěn)定型心絞痛(UAP)發(fā)病的關(guān)系。方法:招募了299例研究對(duì)象并分成UAP組(n=146)和對(duì)照組(n=153),經(jīng)測(cè)序鑒定IL-10 基因1082G/A多態(tài)性,并檢測(cè)血糖和血脂等生化指標(biāo)。結(jié)果:IL-10 基因1082G/A在UAP組和對(duì)照組中均存在GG、AG和AA這3種基因型;3種基因型分布頻率、等位基因分布頻率與對(duì)照組相比均無(wú)統(tǒng)計(jì)學(xué)差異;調(diào)整對(duì)多個(gè)危險(xiǎn)因素行多元logistic回歸分析,示IL-10 基因1082G/A 3種基因型與UAP的發(fā)病仍無(wú)相關(guān)性。結(jié)論:IL-10 基因1082G/A 多態(tài)性與中國(guó)常州地區(qū)人群UAP的發(fā)病無(wú)相關(guān)性。
關(guān)鍵詞 不穩(wěn)定型心絞痛 白介素-10 基因多態(tài)性
中圖分類號(hào):R541.4 文獻(xiàn)標(biāo)識(shí)碼:B 文章編號(hào):1006-1533(2014)21-0046-04
Polymorphism analysis of interleukin-10 gene 1082G/A
in patients with unstable angina pectoris
SHI Leizhong,QIAN Zhihong, LI Yingfu, NI Yue, CHEN Guoqin
(Department of Cardiology, The Peoples Hospital of Liyang City, Liyang 213300, China)
ABSTRACT Objective: To study the association between the polymorphism of interleukin-10(IL-10)gene 1082G/A and the incidence of unstable angina pectoris (UAP) in the Chinese Han population of Changzhou region. Methods: Two hundred and ninety-nine subjects were recruited and divided into a UAP group (n=146) and a control group (n=153), who were free from coronary artery disease. The polymorphism of IL-10 gene 1082G/A from those subjects was identified by sequencing and meanwhile biochemical indicators such as blood sugar and blood lipid were determined. Results: There were three kinds of genotypes including GG, AG and AA in two groups and the distribution frequencies of their genotypes and alleles had no statistical difference and the logistic regression analysis of multivariate risk factors such as smoking, blood pressure, blood sugar, TG, TC, LDL, HDL showed that genotypes and the incidence of UAP had no correlation either. Conclusion: The polymorphism of IL-10 gene was no associated with UAP in the Chinese Han population of Changzhou region.
KEY WORDS interleukin-10; gene polymorphism; unstable angina pectoris
炎癥反應(yīng)在不穩(wěn)定型心絞痛(unstable angina pectoris,UAP)發(fā)病及發(fā)展過(guò)程中的作用得到越來(lái)越多的證實(shí)[1],研究表明,白介素-10(IL-10)提高了動(dòng)脈粥樣斑塊的穩(wěn)定性,是粥樣硬化的保護(hù)因子[2]。目前發(fā)現(xiàn)IL-10基因啟動(dòng)子具有多態(tài)性,IL-10合成的變化與基因變異有關(guān)[3]。UAP發(fā)病是遺傳因素和基因缺陷共同作用的結(jié)果[4]。在兩者共同作用下,各種炎性刺激因子形成炎癥導(dǎo)致易損斑塊的破裂是UAP發(fā)生的始動(dòng)環(huán)節(jié)。1082G/A是IL-10基因的啟動(dòng)子,有報(bào)道表明,其與冠心病及腦梗死發(fā)病有關(guān)[5-6]。本研究以中國(guó)常州地區(qū)人群為研究對(duì)象,探討IL-10基因——1082G/A單核苷酸多態(tài)性在UAP發(fā)病中的作用及臨床意義。
資料與方法
研究對(duì)象
入選的299例研究對(duì)象分別來(lái)源于常州市溧陽(yáng)人民醫(yī)院和常州市武進(jìn)醫(yī)院,均為2010年6月-2013年3月在心內(nèi)科住院的患者,其中確診為UAP者146例作為UAP組,包含男106例,女44例,年齡 30~85歲,平均(65.57 ±10.55)歲,均符合ESC/ACC/AHA/WHF于2007年10月聯(lián)合頒布的關(guān)于UAP的診斷標(biāo)準(zhǔn),并經(jīng)行冠狀動(dòng)脈造影證實(shí)存在冠狀動(dòng)脈病變。選擇同期因胸悶、胸痛等原因住院行冠脈造影排除冠心病者153例作為對(duì)照組,包含男83例,女70例,年齡32~85歲,平均(60.98±10.43)歲。所有入選對(duì)象排除肝臟和腎臟疾病,惡性腫瘤,風(fēng)濕類疾病,近期有急、慢性感染及炎癥者。所有入選對(duì)象均簽署知情同意書[7]。
研究方法
抽取研究對(duì)象外周靜脈血2 ml,置入EDTA抗凝管,用 DNA試劑盒抽提基因組DNA,-70 ℃冰箱保存。引物由上海生物技術(shù)工程有限公司合成,上游引物為5'-TGGCTCCCCTTACCTTCTACA-3',下游引物為5'-GGGTGGGCTAAATATCCTCAA-3'。PCR擴(kuò)增溶液共50 ?l,溶液內(nèi)包括: 1 ?l 4×dNTP約50 ng、5 ?l Taq buffer、5 ?l 25 mmol/L MgCl2、1 ?l 10 pmol上、下游引物、0.5 ?l EXTaq 酶2.5 U和1 ?l DNA模板約100 ng, 35.5 ?l去離子水。循環(huán)參數(shù):95 ℃預(yù)變性3 min,然后按94 ℃ 30 s,58 ℃ 35 s,進(jìn)行35個(gè)循環(huán),終末延伸72 ℃ 5 min。反應(yīng)結(jié)束后,取PCR產(chǎn)物5 ?l, 1%瓊脂糖電泳,150 V、100 mA 20 min電泳觀察。然后純化PCR產(chǎn)物,并用回收試劑盒回收產(chǎn)物進(jìn)一步測(cè)序鑒定IL-10基因啟動(dòng)子——1082G/A位點(diǎn)基因型。同時(shí)采用全自動(dòng)生化分析儀(奧林巴斯公司)測(cè)定三酰甘油( TG)、膽固醇(TC)、低密度脂蛋白 (LDL-c)、高密度脂蛋白(HDL-c)和血糖(Glu)等指標(biāo)。
統(tǒng)計(jì)學(xué)分析
應(yīng)用SPSS 14.0軟件進(jìn)行資料分析。組間計(jì)量資料以()表示,用t檢驗(yàn);基因型和等位基因頻率比較及Hardy-Werberg平衡程度用χ2檢驗(yàn),用多元logistic回歸分析基因型與UAP發(fā)病的相關(guān)性,關(guān)聯(lián)程度用0R 和95% CI表示,P<0.05為差異有顯著性意義。
結(jié)果
UAP組與對(duì)照組的臨床資料比較
UAP組年齡大,男性多,吸煙者及糖尿病患者明顯多于對(duì)照組(P<0.01),兩組間高血壓、HDL-C等組成比較無(wú)差異,但發(fā)現(xiàn)UAP組TC、TG、LDL-c明顯增高(表1)。
基因多態(tài)性分型
IL-10——1082G/A基因多態(tài)位點(diǎn)經(jīng)PCR擴(kuò)增后獲得目的片段大小為140 bp,結(jié)果見(jiàn)圖1,圖2。
基因構(gòu)成比比較
兩組中均存在GG、AG和AA這3種基因型,比較兩組間基因型頻率和等位基因頻率分布均無(wú)明顯差異(P>0.05);調(diào)整年齡、性別(男性為1,女性為0)、吸煙、高血壓病、糖尿病、血脂對(duì)GG、AG 、AA這3種基因型行多個(gè)相關(guān)危險(xiǎn)因素Logistic分析比較仍無(wú)相關(guān)性(P>0.05,表2)。
討論
UAP是冠狀動(dòng)脈粥樣硬化引起血管內(nèi)膜損傷、斑塊破潰脫落,繼發(fā)血小板激活、聚集、黏附、血栓形成,導(dǎo)致冠狀動(dòng)脈的不完全閉塞,引起胸悶、胸痛,發(fā)病與炎癥反應(yīng)密切相關(guān)[8]。
IL-10是分子量為30~40 kD的酸性蛋白,其成熟形式含有160個(gè)氨基酸,活性形式通常是通過(guò)二鍵構(gòu)成二聚體多肽,其基因定位于第l號(hào)染色體上由5個(gè)外顯子及3個(gè)內(nèi)含子組成,轉(zhuǎn)錄的mRNA長(zhǎng)約2 Kb[9-10],IL-10有廣泛生物學(xué)作用,在機(jī)體中主要起著免疫抑制和抗炎癥兩大作用,已發(fā)現(xiàn)IL-10與自身免疫性疾?。ㄈ鐫冃越Y(jié)腸炎、Crohn病、風(fēng)濕性關(guān)節(jié)炎等)的發(fā)病密切相關(guān),且參與了心血管疾病的發(fā)病過(guò)程。
有研究表明,急性冠脈綜合征的患者IL-10的水平降低,并與惡性心血管事件的發(fā)生呈正相關(guān)[11]。實(shí)驗(yàn)表明,急性冠脈綜合征患者氧化LDL刺激的巨噬細(xì)胞中,IL-10能減少血管泡沫細(xì)胞凋亡,說(shuō)明IL-10能對(duì)抗氧化LDL誘導(dǎo)的泡沫細(xì)胞的凋亡,進(jìn)一步提示IL-10提高了斑塊的穩(wěn)定性,是粥樣硬化的保護(hù)因子。
IL-10基因啟動(dòng)子具有多態(tài)性,IL-10合成的變化與基因變異有關(guān)。Turner等[3]發(fā)現(xiàn)IL-10基因啟動(dòng)子——1082 G向A的轉(zhuǎn)變,在一定刺激下可使IL-10蛋白表達(dá)下調(diào)30%,Olivieri等[12]發(fā)現(xiàn)IL-10啟動(dòng)子區(qū)域的1082 GG基因型表達(dá)增多和IL-10水平的增加,可以抑制慢性血管損傷引起的炎癥反應(yīng)并減少動(dòng)脈粥樣硬化合并癥的危險(xiǎn)性。已有報(bào)道高加索人GA+AA基因型與冠心病發(fā)病相關(guān)[5],表明IL-10 1082 GG基因型表達(dá)增多和IL-10水平的增加是血管性疾病的保護(hù)因子。
本研究共入選中國(guó)常州地區(qū)漢族人299例為研究對(duì)象,其中UAP組146 例,對(duì)照組153例,檢測(cè)了IL-10基因啟動(dòng)子——1082G/A單核苷酸多態(tài)性,發(fā)現(xiàn)兩組均存在GG、AG、AA這3種基因型,且基因型分布符合HaIdy-Weinberg平衡。與對(duì)照組相比,UAP組3種基因型和A、G等位基因頻率分布無(wú)顯著差異,經(jīng)多因素logstic回歸分析后發(fā)現(xiàn),3種基因型與UAP的發(fā)病仍無(wú)相關(guān)性,結(jié)果提示,該基因變異不是中國(guó)常州地區(qū)漢族人群UAP發(fā)病的易感因素,且與國(guó)外研究相比,GG基因型明顯偏少,與國(guó)外研究存有較大的差異。分析可能有以下原因:①心血管疾病是一種復(fù)雜的多基因遺傳性疾病,種族差異所致遺傳易感性在不同人群種族中具有差異,而且外部環(huán)境因素也參與該疾病的發(fā)生和發(fā)展。②樣本存在不均一性,如性別、發(fā)病年齡等,本研究對(duì)象的平均年齡較大,兩組間存在較大年齡差異。③試驗(yàn)設(shè)計(jì)不完全相同以及樣本量偏小,缺乏大規(guī)模的前瞻性研究。
綜上所述,不同種族人群中,IL-10基因——1082G/A多態(tài)性頻率差異較大,IL-10基因——1082G/A變異在中國(guó)常州地區(qū)人群中發(fā)生頻率與UAP的發(fā)病無(wú)顯著性相關(guān)。IL-10基因多態(tài)性與UAP的確切聯(lián)系及在心血管疾病中的預(yù)測(cè)價(jià)值尚需多中心、大樣本量的研究及在功能學(xué)方面的進(jìn)一步研究。
參考文獻(xiàn)
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Von D, Thusen JH, Kuiper J, et al. Attenuation of atheoregnesis by systemic and local adenovirus-mediated gene transfer of inetleukin-10 in LDLr -/- mice[J]. FASEB J, 2001, 15(14): 2730-2732.
Turner DM, Williams DM, Sankaran D, et al. An investigation of polymorphism in the interleukin-10 gene promoter[J]. Eur J Immunogenet, 1997, 24(1): 1-8.
Margaret A, Nordlie MA, Loren E, et al. Genetic contributors toward increased risk for ischemic heart disease[J]. J Mol Cell Cardiol, 2005, 39(4): 667-679.
Wang Y, Zheng J, Liu P, et al. Association between the Interleukin 10-1082G>A polymorphism and coronary heart disease risk in a Caucasian population: a meta-analysis[J]. Int J Immunogenet, 2012, 39(2): 144-150.
張國(guó)忠.白細(xì)胞介素-1、10及腫瘤壞死因子基因多態(tài)性與腦梗塞相關(guān)性研究[D].廣州:第一軍醫(yī)大學(xué), 2006.
錢志宏.妊娠相關(guān)血漿蛋白-A基因IVS6+95多態(tài)性與急性冠脈綜合征的相關(guān)性[D].鎮(zhèn)江:江蘇大學(xué), 2010.
Lusis AJ. Atherosclerosis[J]. Nature, 2000, 407 (6801): 233-241.
Halvorsen B, Waehre T, Scholz H, et al. Inlerleukin-10 enhances the 0xjdized LDL-induced foam cell formation anon of macrophges by antiaoptotic mechanisms[J]. J Lipid Res, 2005, 46(2): 2ll-219.
Trompet S, Pons D, DE Craen AJ, et al. Genetic variation in the interIeukin-10 gene promoter and risk of coronary cerebrovascular events: the PROSPER study[J]. Ann N Y Arad Sci, 2007, 1100(1): 189-198.
Yao I, Huang K, Huang D, et al. Acute myocardial infarction induced increases in plasma tumor necrosis factor-α and interleukin-10 are associated with the e activation of poly (ADP-rebose) polymerase of circulation mononuclear cell[J]. Int J Cardial, 2008, 123(3): 366-368.
Olivieri F, Antonicclli R, Cardelli M, et al. Genetic polymorphisms of inflammatory cytokines and myocardial infarction on in the elderly[J]. Mech Ageing Dev, 2006, 127(6): 552-559.
(收稿日期:2014-06-27)
Von D, Thusen JH, Kuiper J, et al. Attenuation of atheoregnesis by systemic and local adenovirus-mediated gene transfer of inetleukin-10 in LDLr -/- mice[J]. FASEB J, 2001, 15(14): 2730-2732.
Turner DM, Williams DM, Sankaran D, et al. An investigation of polymorphism in the interleukin-10 gene promoter[J]. Eur J Immunogenet, 1997, 24(1): 1-8.
Margaret A, Nordlie MA, Loren E, et al. Genetic contributors toward increased risk for ischemic heart disease[J]. J Mol Cell Cardiol, 2005, 39(4): 667-679.
Wang Y, Zheng J, Liu P, et al. Association between the Interleukin 10-1082G>A polymorphism and coronary heart disease risk in a Caucasian population: a meta-analysis[J]. Int J Immunogenet, 2012, 39(2): 144-150.
張國(guó)忠.白細(xì)胞介素-1、10及腫瘤壞死因子基因多態(tài)性與腦梗塞相關(guān)性研究[D].廣州:第一軍醫(yī)大學(xué), 2006.
錢志宏.妊娠相關(guān)血漿蛋白-A基因IVS6+95多態(tài)性與急性冠脈綜合征的相關(guān)性[D].鎮(zhèn)江:江蘇大學(xué), 2010.
Lusis AJ. Atherosclerosis[J]. Nature, 2000, 407 (6801): 233-241.
Halvorsen B, Waehre T, Scholz H, et al. Inlerleukin-10 enhances the 0xjdized LDL-induced foam cell formation anon of macrophges by antiaoptotic mechanisms[J]. J Lipid Res, 2005, 46(2): 2ll-219.
Trompet S, Pons D, DE Craen AJ, et al. Genetic variation in the interIeukin-10 gene promoter and risk of coronary cerebrovascular events: the PROSPER study[J]. Ann N Y Arad Sci, 2007, 1100(1): 189-198.
Yao I, Huang K, Huang D, et al. Acute myocardial infarction induced increases in plasma tumor necrosis factor-α and interleukin-10 are associated with the e activation of poly (ADP-rebose) polymerase of circulation mononuclear cell[J]. Int J Cardial, 2008, 123(3): 366-368.
Olivieri F, Antonicclli R, Cardelli M, et al. Genetic polymorphisms of inflammatory cytokines and myocardial infarction on in the elderly[J]. Mech Ageing Dev, 2006, 127(6): 552-559.
(收稿日期:2014-06-27)
Von D, Thusen JH, Kuiper J, et al. Attenuation of atheoregnesis by systemic and local adenovirus-mediated gene transfer of inetleukin-10 in LDLr -/- mice[J]. FASEB J, 2001, 15(14): 2730-2732.
Turner DM, Williams DM, Sankaran D, et al. An investigation of polymorphism in the interleukin-10 gene promoter[J]. Eur J Immunogenet, 1997, 24(1): 1-8.
Margaret A, Nordlie MA, Loren E, et al. Genetic contributors toward increased risk for ischemic heart disease[J]. J Mol Cell Cardiol, 2005, 39(4): 667-679.
Wang Y, Zheng J, Liu P, et al. Association between the Interleukin 10-1082G>A polymorphism and coronary heart disease risk in a Caucasian population: a meta-analysis[J]. Int J Immunogenet, 2012, 39(2): 144-150.
張國(guó)忠.白細(xì)胞介素-1、10及腫瘤壞死因子基因多態(tài)性與腦梗塞相關(guān)性研究[D].廣州:第一軍醫(yī)大學(xué), 2006.
錢志宏.妊娠相關(guān)血漿蛋白-A基因IVS6+95多態(tài)性與急性冠脈綜合征的相關(guān)性[D].鎮(zhèn)江:江蘇大學(xué), 2010.
Lusis AJ. Atherosclerosis[J]. Nature, 2000, 407 (6801): 233-241.
Halvorsen B, Waehre T, Scholz H, et al. Inlerleukin-10 enhances the 0xjdized LDL-induced foam cell formation anon of macrophges by antiaoptotic mechanisms[J]. J Lipid Res, 2005, 46(2): 2ll-219.
Trompet S, Pons D, DE Craen AJ, et al. Genetic variation in the interIeukin-10 gene promoter and risk of coronary cerebrovascular events: the PROSPER study[J]. Ann N Y Arad Sci, 2007, 1100(1): 189-198.
Yao I, Huang K, Huang D, et al. Acute myocardial infarction induced increases in plasma tumor necrosis factor-α and interleukin-10 are associated with the e activation of poly (ADP-rebose) polymerase of circulation mononuclear cell[J]. Int J Cardial, 2008, 123(3): 366-368.
Olivieri F, Antonicclli R, Cardelli M, et al. Genetic polymorphisms of inflammatory cytokines and myocardial infarction on in the elderly[J]. Mech Ageing Dev, 2006, 127(6): 552-559.
(收稿日期:2014-06-27)