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冠心病合并2型糖尿病患者的小凹蛋白_1表達(dá)的變化及其意義

2014-08-30 07:50王琳等
心腦血管病防治 2014年4期
關(guān)鍵詞:單核細(xì)胞外周血硬化

王琳等

[摘要]目的探討小凹蛋白_1(Cav_1)在冠心?。–AD)合并2型糖尿?。═2DM)患者中的表達(dá)及其意義。方法選擇148例經(jīng)冠狀動(dòng)脈造影及臨床證實(shí)的CAD患者,其中合并T2DM患者94例,單純CAD54例,另選取無(wú)冠狀動(dòng)脈病變及糖尿病16例為對(duì)照組。用流式細(xì)胞技術(shù)檢測(cè)各組外周血單核細(xì)胞Cav_1的表達(dá)水平,全自動(dòng)生化分析儀測(cè)定高敏C反應(yīng)蛋白(hs_CRP)及空腹血糖(FBG)。結(jié)果CAD合并T2DM患者外周血單核細(xì)胞Cav_1表達(dá)水平顯著低于對(duì)照組及單純CAD組,差異有統(tǒng)計(jì)學(xué)意義(P<0.01,<0.05);CAD合并T2DM組血清hs_CRP的水平顯著高于單純CAD組及對(duì)照組,差異有統(tǒng)計(jì)學(xué)意義(P<0.01)。單核細(xì)胞Cav_1的表達(dá)水平與hs_CRP及空腹血糖呈負(fù)相關(guān)(r=-0.47、-0.31,均P<0.01)。多元Logistic回歸分析顯示CAD合并T2DM與Cav_1及FBG密切相關(guān)(OR=0.97、3.44,均P<0.05)。結(jié)論Cav_1表達(dá)低下是發(fā)生CAD合并T2DM的一個(gè)危險(xiǎn)因素,并在一定程度上可預(yù)測(cè)CAD合并T2DM的發(fā)生。

[關(guān)鍵詞]小凹蛋白_1;高敏C反應(yīng)蛋白;冠心??;2型糖尿?。谎?/p>

中圖分類(lèi)號(hào):R541.4文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1009_816X(2014)04_0290_03

[Abstract] Objective To investigate the expression of Caveolin_1(Cav_1)in coronary artery disease (CAD) complicated with type 2 diabetes mellitus (T2DM). Methods Cav_1 level was measured in peripheral blood mononuclear cells using flow cytometry among 94 CAD complicated with T2DM patients and 54 CAD patients, which CAD was diagnosed by coronary angiography and clinical manifestation, while 16 patients without CAD and T2DM were enrolled as normal control group. High_sensitivity C reactive protein (hs_CRP) and fasting blood glucose (FBG) level were detected by automatic biochemistry analyzer. Results Compared with normal control and CAD group, the expression of Cav_1 in CAD complicated with T2DM patients was significantly lower(P<0.01,<0.05) and the level of hs_CRP in CAD complicated with T2DM group was extremely higher (P<0.01). Furthermore, the expression of Cav_1 was negative correlated with hs_CRP and FBG (r=-0.47、-0.31,P<0.01). The multiple logistic regression indicated that CAD complicated with T2DM and Cav_1、FBG were closely related(OR=0.97、3.44,P<0.05). Conclusions The lower level of expression of Cav_1 on peripheral blood mononuclear cells is one risk factor for CAD complicated with T2DM, to some extent, may be a possible predicting index for CAD with T2DM.

[Key words] Caveolin_1; High_sensitivity Creactive protein; Coronary artery disease; Type 2 diabetes mellitus; Blood glucose

糖尿病(DM)是一種以血糖代謝紊亂為特點(diǎn)的常見(jiàn)慢性疾病,不僅增加冠心?。–AD)及中風(fēng)(Stroke)的風(fēng)險(xiǎn)[1],而且增加急性心肌梗死(AMI)及中風(fēng)的死亡率。小凹蛋白_1(Caveolin_1,Cav_1)是表達(dá)于細(xì)胞膜小凹(Caveolae)的重要蛋白,維持著小凹的完整性。Cav_1的異常表達(dá)與許多疾病密切相關(guān),包括動(dòng)脈硬化、腫瘤、肌營(yíng)養(yǎng)不良、早老性癡呆及糖尿病等。Toshio[2]提出高糖環(huán)境下人白血病單核細(xì)胞株(THP_1)來(lái)源的巨噬細(xì)胞Cav_1表達(dá)水平下調(diào),小凹數(shù)量減少,促進(jìn)巨噬細(xì)胞凋亡及泡沫細(xì)胞形成,與動(dòng)脈粥樣硬化形成有關(guān)。位于人類(lèi)動(dòng)脈斑塊中的巨噬細(xì)胞來(lái)自血液?jiǎn)魏思?xì)胞,本研究觀察冠心病合并2型糖尿?。═ype 2 Diabetes Mellitus,T2DM)患者外周血單核細(xì)胞Cav_1表達(dá)、血清高敏C反應(yīng)蛋白及血糖的變化,并探討其臨床意義。

1資料與方法

1.1一般資料:所有受試者均為臺(tái)州醫(yī)院心內(nèi)科2009年3月至9月的連續(xù)住院患者。分為CAD合并T2DM組、單純CAD組和不典型胸痛組。入選標(biāo)準(zhǔn):根據(jù)1999年WHO糖尿病診斷分型標(biāo)準(zhǔn)將CAD患者分為冠心病合并T2DM組(54例)和單純CAD組(94例),分別經(jīng)冠脈造影證實(shí)左前降支(LAD)、回旋支(LCX)、右冠狀動(dòng)脈(RCA)中至少有1支血管內(nèi)徑狹窄≥50%。對(duì)照組(16例):為不典型胸痛患者,經(jīng)血生化檢查、X線胸片、心電圖、超聲心動(dòng)圖及冠狀動(dòng)脈造影檢查排除心臟疾患。排除標(biāo)準(zhǔn):近1月內(nèi)服用β受體阻滯藥、調(diào)脂藥或利尿藥,肝纖維化、感染或腫瘤、近期重大外傷或手術(shù)、腦血管和周?chē)懿 ⒆陨砻庖咝约膊?、?yán)重肝腎疾病、嚴(yán)重的全身其他系統(tǒng)疾病、近期服用抗炎藥、心肌炎等。

1.2方法:入院第二天清晨空腹抽取患者肘靜脈血約5ml入EDTA抗凝管,取抗凝全血100μl,加入鼠抗人CD14_APC抗體(美國(guó)B_D公司)10ul,加入兔抗人Cav_1多克隆抗體(美國(guó)cell signaling公司)1ul,混勻避光15min后加入FITC標(biāo)記的山羊抗兔多克隆抗體1ul,再次混勻避光15min后加入紅細(xì)胞裂解液2ml,混勻避光10min,經(jīng)800轉(zhuǎn)/min離心6min后棄去上清液,予PBS液2ml重懸沉淀并振蕩混勻,800轉(zhuǎn)/min離心6min后棄去上清液,將細(xì)胞重懸于PBS液500ul中,以流式細(xì)胞儀檢測(cè),用cellquest軟件檢測(cè)和分析數(shù)據(jù),以CD14/SSC設(shè)單核細(xì)胞門(mén),分析其Cav_1表達(dá)的熒光強(qiáng)度。

如上再取肘靜脈血,以日本奧林巴斯全自動(dòng)生化分析儀測(cè)定高敏C反應(yīng)蛋白(hs_CRP)、空腹血糖(FBG)、總膽固醇(TC)、甘油三酯(TG)等水平。

1.3統(tǒng)計(jì)學(xué)處理:使用SPSS12.0版統(tǒng)計(jì)軟件。計(jì)量資料用(x-±s)表示,兩樣本均數(shù)比較采用獨(dú)立樣本t檢驗(yàn),多樣本均數(shù)比較采用方差分析,不連續(xù)樣本比較采用Kruskal_wallis檢驗(yàn),連續(xù)計(jì)量資料相關(guān)性采用Pearson相關(guān)性分析,不連續(xù)計(jì)量資料采用Spearman秩相關(guān)分析,影響CAD合并T2DM發(fā)生的變量應(yīng)用Logistic回歸分析。P<0.05為差異有統(tǒng)計(jì)學(xué)意義。

2結(jié)果

2.1三組患者一般資料比較:三組患者年齡、性別構(gòu)成、吸煙人數(shù)、高血壓分布、血清總膽固醇、甘油三脂、高密度脂蛋白、肌酐、尿素氮、尿酸水平等因素比較差異無(wú)統(tǒng)計(jì)學(xué)意義(P>0.05),見(jiàn)表1。

本研究發(fā)現(xiàn)單純CAD組單核細(xì)胞Cav_1表達(dá)水平顯著低于正常對(duì)照組,而CAD合并T2DM組Cav_1表達(dá)顯著低于單純CAD組。提示CAD合并T2DM患者冠狀動(dòng)脈粥樣斑塊不穩(wěn)定,容易發(fā)生心血管事件。有報(bào)道發(fā)現(xiàn),與單純CAD患者比較,在血管內(nèi)超聲下CAD合并T2DM患者的冠脈病變更嚴(yán)重,不穩(wěn)定斑塊更多[7]。

大量數(shù)據(jù)表明,當(dāng)2型糖尿病患者具有高水平的炎癥標(biāo)志物高敏C反應(yīng)蛋白(high_sensitivity Creactive protein,hs_CRP)時(shí),其冠心病病死率明顯提高。高血糖是各型糖尿病的共同特征,也是糖尿病血管病變的危險(xiǎn)因子,實(shí)驗(yàn)發(fā)現(xiàn)高糖能抑制單核細(xì)胞來(lái)源巨噬細(xì)胞Cav_1的表達(dá)[2],能促進(jìn)大鼠外周血白細(xì)胞介素_1、TNF_α升高[8],后兩種炎癥介質(zhì)均可導(dǎo)致CRP合成增加,與動(dòng)脈粥樣硬化形成存在聯(lián)系。Cav_1在多種炎癥反應(yīng)發(fā)生發(fā)展中起重要調(diào)控作用。本研究通過(guò)檢測(cè)血糖、hs_CRP水平及單核細(xì)胞Cav_1的表達(dá),發(fā)現(xiàn)血糖水平與Cav_1呈負(fù)相關(guān),CAD合并T2DM組單核細(xì)胞hs_CRP表達(dá)顯著高于單純CAD組及對(duì)照組,外周血單核細(xì)胞Cav_1水平與hs_CRP呈負(fù)相關(guān)。提示CAD合并T2DM患者慢性炎癥反應(yīng)的程度比單純CAD患者更為嚴(yán)重,而外周血單核細(xì)胞Cav_1也可能參與血糖代謝及炎癥過(guò)程,促進(jìn)糖尿病患者動(dòng)脈粥樣硬化的發(fā)展,其作用機(jī)制仍需進(jìn)一步研究。Logistic回歸分析發(fā)現(xiàn)Cav_1是CAD合并T2DM的保護(hù)性因素(P=0.03),Cav_1低表達(dá)與糖尿病患者冠狀動(dòng)脈粥樣硬化的發(fā)生和發(fā)展密切相關(guān)。

綜上所述,CAD合并T2DM時(shí),Cav_1表達(dá)水平明顯降低,而hs_CRP表達(dá)水平明顯增高。Cav_1與血糖水平、hs_CRP可能共同參與了CAD合并T2DM患者動(dòng)脈粥樣硬化的發(fā)生、發(fā)展過(guò)程。由于本研究樣本量較少,需要更大規(guī)模和前瞻性的研究加以驗(yàn)證。

參考文獻(xiàn)

[1]P McCarron, R Greenwood, P Elwood. The incidence and etiology of stroke in the Caerphilly and Speedwell Collaborative Studies II: risk factors for ischemic stroke[J]. Public Health,2001,115(1):12-20.

[2]Hoya Shi T, Juliet Par, Mipazaki A, et al. High glucose downregulates the number of caveolae in monocytes through oxidative stress from NADPH oxidase: Implications for atherosclerosis[J]. Biochimicaet Biophysica Acta,2007,1772(3):364-372.

[3]Jiang W, Li S, Mao W, et al. Effect of Huxin Formula on reverse cholesterol transport in ApoE_gene knockout mice[J]. Chin J Integr Med,2012,18(6):451-6.

[4]Schwencke C, Schmeisser A, Walter C, et al. Decreased caveolin_1 in atheroma: loss of antiproliferative control of vascular smooth muscle cells in atherosclerosis[J]. Cardiovasc Res,2005,68(1):128-135.

[5] Rodriguez_Feo JA, Hellings WE, Moll FL, et al. Caveolin_1 influences vascular protease activity and is a potential stabilizing factor in human atherosclerotic disease[J]. PLoS One,2008,3(7):e2612.

[6]王琳,江建軍,徐莎莎,等.急性冠脈綜合征患者的小凹蛋白_1及白三烯B4表達(dá)[J].心腦血管病防治,2010,10(1):12-14.

[7]Takayama T, Hiro T, Ueda Y, et al. Plaque stabilization by intensive LDL_cholesterol lowering therapy with atorvastatin is delayed in type 2 diabetic patients with coronary artery disease_Serial angioscopic and intravascular ultrasound analysis[J]. J Cardiol,2013,61(6):381-386.

[8]Tanaka Y, Mochizuki K, Fukaya N, et al. The alpha_glucosidase inhibitor miglitol suppresses postprandial hyperglycaemia and interleukin_1beta and tumour necrosis factor_alpha gene expression in rat peripheral leucocytes induced by intermittent sucrose loading[J]. Br J Nutr,2009,102(2):221-225.

(收稿日期:2013_12_26)

1.2方法:入院第二天清晨空腹抽取患者肘靜脈血約5ml入EDTA抗凝管,取抗凝全血100μl,加入鼠抗人CD14_APC抗體(美國(guó)B_D公司)10ul,加入兔抗人Cav_1多克隆抗體(美國(guó)cell signaling公司)1ul,混勻避光15min后加入FITC標(biāo)記的山羊抗兔多克隆抗體1ul,再次混勻避光15min后加入紅細(xì)胞裂解液2ml,混勻避光10min,經(jīng)800轉(zhuǎn)/min離心6min后棄去上清液,予PBS液2ml重懸沉淀并振蕩混勻,800轉(zhuǎn)/min離心6min后棄去上清液,將細(xì)胞重懸于PBS液500ul中,以流式細(xì)胞儀檢測(cè),用cellquest軟件檢測(cè)和分析數(shù)據(jù),以CD14/SSC設(shè)單核細(xì)胞門(mén),分析其Cav_1表達(dá)的熒光強(qiáng)度。

如上再取肘靜脈血,以日本奧林巴斯全自動(dòng)生化分析儀測(cè)定高敏C反應(yīng)蛋白(hs_CRP)、空腹血糖(FBG)、總膽固醇(TC)、甘油三酯(TG)等水平。

1.3統(tǒng)計(jì)學(xué)處理:使用SPSS12.0版統(tǒng)計(jì)軟件。計(jì)量資料用(x-±s)表示,兩樣本均數(shù)比較采用獨(dú)立樣本t檢驗(yàn),多樣本均數(shù)比較采用方差分析,不連續(xù)樣本比較采用Kruskal_wallis檢驗(yàn),連續(xù)計(jì)量資料相關(guān)性采用Pearson相關(guān)性分析,不連續(xù)計(jì)量資料采用Spearman秩相關(guān)分析,影響CAD合并T2DM發(fā)生的變量應(yīng)用Logistic回歸分析。P<0.05為差異有統(tǒng)計(jì)學(xué)意義。

2結(jié)果

2.1三組患者一般資料比較:三組患者年齡、性別構(gòu)成、吸煙人數(shù)、高血壓分布、血清總膽固醇、甘油三脂、高密度脂蛋白、肌酐、尿素氮、尿酸水平等因素比較差異無(wú)統(tǒng)計(jì)學(xué)意義(P>0.05),見(jiàn)表1。

本研究發(fā)現(xiàn)單純CAD組單核細(xì)胞Cav_1表達(dá)水平顯著低于正常對(duì)照組,而CAD合并T2DM組Cav_1表達(dá)顯著低于單純CAD組。提示CAD合并T2DM患者冠狀動(dòng)脈粥樣斑塊不穩(wěn)定,容易發(fā)生心血管事件。有報(bào)道發(fā)現(xiàn),與單純CAD患者比較,在血管內(nèi)超聲下CAD合并T2DM患者的冠脈病變更嚴(yán)重,不穩(wěn)定斑塊更多[7]。

大量數(shù)據(jù)表明,當(dāng)2型糖尿病患者具有高水平的炎癥標(biāo)志物高敏C反應(yīng)蛋白(high_sensitivity Creactive protein,hs_CRP)時(shí),其冠心病病死率明顯提高。高血糖是各型糖尿病的共同特征,也是糖尿病血管病變的危險(xiǎn)因子,實(shí)驗(yàn)發(fā)現(xiàn)高糖能抑制單核細(xì)胞來(lái)源巨噬細(xì)胞Cav_1的表達(dá)[2],能促進(jìn)大鼠外周血白細(xì)胞介素_1、TNF_α升高[8],后兩種炎癥介質(zhì)均可導(dǎo)致CRP合成增加,與動(dòng)脈粥樣硬化形成存在聯(lián)系。Cav_1在多種炎癥反應(yīng)發(fā)生發(fā)展中起重要調(diào)控作用。本研究通過(guò)檢測(cè)血糖、hs_CRP水平及單核細(xì)胞Cav_1的表達(dá),發(fā)現(xiàn)血糖水平與Cav_1呈負(fù)相關(guān),CAD合并T2DM組單核細(xì)胞hs_CRP表達(dá)顯著高于單純CAD組及對(duì)照組,外周血單核細(xì)胞Cav_1水平與hs_CRP呈負(fù)相關(guān)。提示CAD合并T2DM患者慢性炎癥反應(yīng)的程度比單純CAD患者更為嚴(yán)重,而外周血單核細(xì)胞Cav_1也可能參與血糖代謝及炎癥過(guò)程,促進(jìn)糖尿病患者動(dòng)脈粥樣硬化的發(fā)展,其作用機(jī)制仍需進(jìn)一步研究。Logistic回歸分析發(fā)現(xiàn)Cav_1是CAD合并T2DM的保護(hù)性因素(P=0.03),Cav_1低表達(dá)與糖尿病患者冠狀動(dòng)脈粥樣硬化的發(fā)生和發(fā)展密切相關(guān)。

綜上所述,CAD合并T2DM時(shí),Cav_1表達(dá)水平明顯降低,而hs_CRP表達(dá)水平明顯增高。Cav_1與血糖水平、hs_CRP可能共同參與了CAD合并T2DM患者動(dòng)脈粥樣硬化的發(fā)生、發(fā)展過(guò)程。由于本研究樣本量較少,需要更大規(guī)模和前瞻性的研究加以驗(yàn)證。

參考文獻(xiàn)

[1]P McCarron, R Greenwood, P Elwood. The incidence and etiology of stroke in the Caerphilly and Speedwell Collaborative Studies II: risk factors for ischemic stroke[J]. Public Health,2001,115(1):12-20.

[2]Hoya Shi T, Juliet Par, Mipazaki A, et al. High glucose downregulates the number of caveolae in monocytes through oxidative stress from NADPH oxidase: Implications for atherosclerosis[J]. Biochimicaet Biophysica Acta,2007,1772(3):364-372.

[3]Jiang W, Li S, Mao W, et al. Effect of Huxin Formula on reverse cholesterol transport in ApoE_gene knockout mice[J]. Chin J Integr Med,2012,18(6):451-6.

[4]Schwencke C, Schmeisser A, Walter C, et al. Decreased caveolin_1 in atheroma: loss of antiproliferative control of vascular smooth muscle cells in atherosclerosis[J]. Cardiovasc Res,2005,68(1):128-135.

[5] Rodriguez_Feo JA, Hellings WE, Moll FL, et al. Caveolin_1 influences vascular protease activity and is a potential stabilizing factor in human atherosclerotic disease[J]. PLoS One,2008,3(7):e2612.

[6]王琳,江建軍,徐莎莎,等.急性冠脈綜合征患者的小凹蛋白_1及白三烯B4表達(dá)[J].心腦血管病防治,2010,10(1):12-14.

[7]Takayama T, Hiro T, Ueda Y, et al. Plaque stabilization by intensive LDL_cholesterol lowering therapy with atorvastatin is delayed in type 2 diabetic patients with coronary artery disease_Serial angioscopic and intravascular ultrasound analysis[J]. J Cardiol,2013,61(6):381-386.

[8]Tanaka Y, Mochizuki K, Fukaya N, et al. The alpha_glucosidase inhibitor miglitol suppresses postprandial hyperglycaemia and interleukin_1beta and tumour necrosis factor_alpha gene expression in rat peripheral leucocytes induced by intermittent sucrose loading[J]. Br J Nutr,2009,102(2):221-225.

(收稿日期:2013_12_26)

1.2方法:入院第二天清晨空腹抽取患者肘靜脈血約5ml入EDTA抗凝管,取抗凝全血100μl,加入鼠抗人CD14_APC抗體(美國(guó)B_D公司)10ul,加入兔抗人Cav_1多克隆抗體(美國(guó)cell signaling公司)1ul,混勻避光15min后加入FITC標(biāo)記的山羊抗兔多克隆抗體1ul,再次混勻避光15min后加入紅細(xì)胞裂解液2ml,混勻避光10min,經(jīng)800轉(zhuǎn)/min離心6min后棄去上清液,予PBS液2ml重懸沉淀并振蕩混勻,800轉(zhuǎn)/min離心6min后棄去上清液,將細(xì)胞重懸于PBS液500ul中,以流式細(xì)胞儀檢測(cè),用cellquest軟件檢測(cè)和分析數(shù)據(jù),以CD14/SSC設(shè)單核細(xì)胞門(mén),分析其Cav_1表達(dá)的熒光強(qiáng)度。

如上再取肘靜脈血,以日本奧林巴斯全自動(dòng)生化分析儀測(cè)定高敏C反應(yīng)蛋白(hs_CRP)、空腹血糖(FBG)、總膽固醇(TC)、甘油三酯(TG)等水平。

1.3統(tǒng)計(jì)學(xué)處理:使用SPSS12.0版統(tǒng)計(jì)軟件。計(jì)量資料用(x-±s)表示,兩樣本均數(shù)比較采用獨(dú)立樣本t檢驗(yàn),多樣本均數(shù)比較采用方差分析,不連續(xù)樣本比較采用Kruskal_wallis檢驗(yàn),連續(xù)計(jì)量資料相關(guān)性采用Pearson相關(guān)性分析,不連續(xù)計(jì)量資料采用Spearman秩相關(guān)分析,影響CAD合并T2DM發(fā)生的變量應(yīng)用Logistic回歸分析。P<0.05為差異有統(tǒng)計(jì)學(xué)意義。

2結(jié)果

2.1三組患者一般資料比較:三組患者年齡、性別構(gòu)成、吸煙人數(shù)、高血壓分布、血清總膽固醇、甘油三脂、高密度脂蛋白、肌酐、尿素氮、尿酸水平等因素比較差異無(wú)統(tǒng)計(jì)學(xué)意義(P>0.05),見(jiàn)表1。

本研究發(fā)現(xiàn)單純CAD組單核細(xì)胞Cav_1表達(dá)水平顯著低于正常對(duì)照組,而CAD合并T2DM組Cav_1表達(dá)顯著低于單純CAD組。提示CAD合并T2DM患者冠狀動(dòng)脈粥樣斑塊不穩(wěn)定,容易發(fā)生心血管事件。有報(bào)道發(fā)現(xiàn),與單純CAD患者比較,在血管內(nèi)超聲下CAD合并T2DM患者的冠脈病變更嚴(yán)重,不穩(wěn)定斑塊更多[7]。

大量數(shù)據(jù)表明,當(dāng)2型糖尿病患者具有高水平的炎癥標(biāo)志物高敏C反應(yīng)蛋白(high_sensitivity Creactive protein,hs_CRP)時(shí),其冠心病病死率明顯提高。高血糖是各型糖尿病的共同特征,也是糖尿病血管病變的危險(xiǎn)因子,實(shí)驗(yàn)發(fā)現(xiàn)高糖能抑制單核細(xì)胞來(lái)源巨噬細(xì)胞Cav_1的表達(dá)[2],能促進(jìn)大鼠外周血白細(xì)胞介素_1、TNF_α升高[8],后兩種炎癥介質(zhì)均可導(dǎo)致CRP合成增加,與動(dòng)脈粥樣硬化形成存在聯(lián)系。Cav_1在多種炎癥反應(yīng)發(fā)生發(fā)展中起重要調(diào)控作用。本研究通過(guò)檢測(cè)血糖、hs_CRP水平及單核細(xì)胞Cav_1的表達(dá),發(fā)現(xiàn)血糖水平與Cav_1呈負(fù)相關(guān),CAD合并T2DM組單核細(xì)胞hs_CRP表達(dá)顯著高于單純CAD組及對(duì)照組,外周血單核細(xì)胞Cav_1水平與hs_CRP呈負(fù)相關(guān)。提示CAD合并T2DM患者慢性炎癥反應(yīng)的程度比單純CAD患者更為嚴(yán)重,而外周血單核細(xì)胞Cav_1也可能參與血糖代謝及炎癥過(guò)程,促進(jìn)糖尿病患者動(dòng)脈粥樣硬化的發(fā)展,其作用機(jī)制仍需進(jìn)一步研究。Logistic回歸分析發(fā)現(xiàn)Cav_1是CAD合并T2DM的保護(hù)性因素(P=0.03),Cav_1低表達(dá)與糖尿病患者冠狀動(dòng)脈粥樣硬化的發(fā)生和發(fā)展密切相關(guān)。

綜上所述,CAD合并T2DM時(shí),Cav_1表達(dá)水平明顯降低,而hs_CRP表達(dá)水平明顯增高。Cav_1與血糖水平、hs_CRP可能共同參與了CAD合并T2DM患者動(dòng)脈粥樣硬化的發(fā)生、發(fā)展過(guò)程。由于本研究樣本量較少,需要更大規(guī)模和前瞻性的研究加以驗(yàn)證。

參考文獻(xiàn)

[1]P McCarron, R Greenwood, P Elwood. The incidence and etiology of stroke in the Caerphilly and Speedwell Collaborative Studies II: risk factors for ischemic stroke[J]. Public Health,2001,115(1):12-20.

[2]Hoya Shi T, Juliet Par, Mipazaki A, et al. High glucose downregulates the number of caveolae in monocytes through oxidative stress from NADPH oxidase: Implications for atherosclerosis[J]. Biochimicaet Biophysica Acta,2007,1772(3):364-372.

[3]Jiang W, Li S, Mao W, et al. Effect of Huxin Formula on reverse cholesterol transport in ApoE_gene knockout mice[J]. Chin J Integr Med,2012,18(6):451-6.

[4]Schwencke C, Schmeisser A, Walter C, et al. Decreased caveolin_1 in atheroma: loss of antiproliferative control of vascular smooth muscle cells in atherosclerosis[J]. Cardiovasc Res,2005,68(1):128-135.

[5] Rodriguez_Feo JA, Hellings WE, Moll FL, et al. Caveolin_1 influences vascular protease activity and is a potential stabilizing factor in human atherosclerotic disease[J]. PLoS One,2008,3(7):e2612.

[6]王琳,江建軍,徐莎莎,等.急性冠脈綜合征患者的小凹蛋白_1及白三烯B4表達(dá)[J].心腦血管病防治,2010,10(1):12-14.

[7]Takayama T, Hiro T, Ueda Y, et al. Plaque stabilization by intensive LDL_cholesterol lowering therapy with atorvastatin is delayed in type 2 diabetic patients with coronary artery disease_Serial angioscopic and intravascular ultrasound analysis[J]. J Cardiol,2013,61(6):381-386.

[8]Tanaka Y, Mochizuki K, Fukaya N, et al. The alpha_glucosidase inhibitor miglitol suppresses postprandial hyperglycaemia and interleukin_1beta and tumour necrosis factor_alpha gene expression in rat peripheral leucocytes induced by intermittent sucrose loading[J]. Br J Nutr,2009,102(2):221-225.

(收稿日期:2013_12_26)

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