彭菊琴 任鈞國(guó) 張藝楠 李春巖
摘要 目的:探討單核細(xì)胞/高密度脂蛋白膽固醇比值(MHR)與冠心病血瘀證的相關(guān)性。方法:選取2018年1月至2018年7月中日友好醫(yī)院收治的冠心病患者180例作為研究對(duì)象,根據(jù)冠心病血瘀證積分分為血瘀證組(n=118)和非血瘀證組(n=62),選取同期非冠心病非血瘀證患者55例作為對(duì)照組,比較3組MHR的差異。采用Logistic回歸分析MHR與冠心病血瘀證的關(guān)系;通過(guò)繪制受試者工作特征曲線(ROC),評(píng)估MHR診斷冠心病血瘀證的能力。結(jié)果:血瘀證組MHR水平高于非血瘀證組和對(duì)照組(P<0.01),非血瘀證組和對(duì)照組之間MHR水平比較,差異無(wú)統(tǒng)計(jì)學(xué)意義(P>0.05)。Logistic回歸分析表明,MHR是冠心病血瘀證的獨(dú)立危險(xiǎn)因素(HR:0.903,95%CI為0.826~0.988,P=0.026)。ROC分析表明,MHR診斷冠心病血瘀證的最佳截止值為14.15,敏感度為83.9%,特異度為68.6%[曲線下面積(AUC)0.609,95%CI為0.521~0.696,P=0.017]。結(jié)論:MHR是冠心病血瘀證的獨(dú)立危險(xiǎn)因素,提示脂質(zhì)驅(qū)動(dòng)的炎癥反應(yīng)可能是冠心病血瘀證形成病理機(jī)制之一。
關(guān)鍵詞 冠心病;血瘀證;單核細(xì)胞/高密度脂蛋白膽固醇比值;炎癥;脂質(zhì)代謝紊亂;理化指標(biāo);診斷;相關(guān)性
Abstract Objective:To analyze the relationship between monocyte to high-density lipoprotein cholesterol ratio(MHR)with blood-stasis syndrome(BSS)in coronary heart disease(CHD).Methods:A total of 180 CHD inpatients admitted to China-Japan Friendship Hospital from January 2018 to July 2018 were selected as the research objects and were divided into a BSS group(118 cases)and a non-BSS group(62 cases)according to the score of BSS in CHD.A total of 55 participants with non-CHD and non-BSS were recruited as control group.The levels of MHR was compared among 3 groups.Logistic regression was used to analyze the relationship between MHR and BSS score.And receiver operating characteristic(ROC)curve was drawn to evaluate the ability of MHR to diagnose BSS of coronary CHD.Results:The levels of MHR in the BSS group was significantly higher than non-BSS group and control group(P<0.01),but there were no statistical difference between non-BSS group and control group(P>0.05).Logistic regression analysis showed that MHR was an independent risk factor for BSS in CHD [HR:0.903,95%CI(0.826 to 0.988),P=0.026].ROC curve analysis demonstrated that the optimal cut-off value of MHR to diagnose BSS in CHD were 14.15,sensitivity of 83.9%,specificity of 68.6% [area under the curve(AUC)0.609,95%CI(0.521 to 0.696); P=0.017].Conclusion:MHR is an independent risk factor for BSS in CHD,which suggests that lipid-driven inflammation may be one of the pathological mechanisms of BSS in CHD.
Keywords Coronary heart disease; Blood-stasis syndrome; Monocyte to high-density lipoprotein cholesterol ratio; Inflammation; Lipid metabolism disorder; Physiochemical index; Diagnosis; Relationship
中圖分類號(hào):R256.2文獻(xiàn)標(biāo)識(shí)碼:Adoi:10.3969/j.issn.1673-7202.2021.14.017
流行病學(xué)調(diào)查結(jié)果顯示,中國(guó)冠心病患者達(dá)1 100萬(wàn)人[1],每年死于冠心病的人數(shù)超過(guò)100萬(wàn)人[2],帶來(lái)了沉重的社會(huì)負(fù)擔(dān)和醫(yī)療負(fù)擔(dān)。冠心病的發(fā)病機(jī)制復(fù)雜,脂質(zhì)代謝紊亂導(dǎo)致單核吞噬細(xì)胞激活,大量炎性趨化因子釋放,是動(dòng)脈粥樣硬化斑塊形成和發(fā)展的重要環(huán)節(jié)[3-4]。高密度脂蛋白膽固醇(HDL-C)能夠調(diào)節(jié)單核細(xì)胞的活化、黏附和遷移,具有抗炎抗氧化作用[5]。近期研究發(fā)現(xiàn),單核細(xì)胞/高密度脂蛋白膽固醇比值(MHR)作為一種新型的炎癥標(biāo)志物,可以反映機(jī)體的炎癥及氧化應(yīng)激水平,預(yù)測(cè)不良心血管事件的發(fā)生[6-8]。
活血化瘀中藥治療冠心病療效明顯,特別是在改善臨床癥狀和提高生命質(zhì)量方面具有一定的優(yōu)勢(shì)[9-11]。血瘀證作為冠心病最常見(jiàn)的中醫(yī)證候[12],主要是由于血液循環(huán)不暢和(或)血管功能紊亂引起的一種病理改變,與冠狀動(dòng)脈狹窄程度以及血管內(nèi)皮炎癥反應(yīng)均有一定的相關(guān)性[13]。MHR作為一種新型炎癥標(biāo)志物,較其他炎癥指標(biāo)具有易獲得、價(jià)格低廉的優(yōu)勢(shì)。本研究探討MHR與冠心病血瘀證的相關(guān)性,從脂質(zhì)驅(qū)動(dòng)的炎癥角度為進(jìn)一步認(rèn)識(shí)冠心病血瘀證提供依據(jù)。
1 資料與方法
1.1 一般資料 選取2018年1月至2018年7月中日友好醫(yī)院收治的冠心病患者180例作為研究對(duì)象,其中男121例,女59例;年齡38~92歲,平均年齡(66.14±11.72)歲;急性心肌梗死患者21例(11.7%),不穩(wěn)定型心絞痛患者106例(58.9%),穩(wěn)定型心絞痛患者53例(29.4%)。按證型分為血瘀證組(n=118)和非血瘀證組(n=62)。另收集非冠心病非血瘀證患者55例作為對(duì)照組,其中男35例,女20例;年齡37~84歲,平均年齡(59.64±10.08)歲。本研究經(jīng)我院倫理委員會(huì)批準(zhǔn)(倫理審批號(hào):2016XLA119-2)。
1.2 診斷標(biāo)準(zhǔn)
1.2.1 冠心病診斷標(biāo)準(zhǔn) 參照1979年國(guó)際心臟病學(xué)會(huì)和協(xié)會(huì)及世界衛(wèi)生組織(WHO)臨床命名標(biāo)準(zhǔn)聯(lián)合專題組提出的《缺血性心臟病的命名及診斷標(biāo)準(zhǔn)》[14]中有關(guān)冠心病的診斷,冠脈造影檢查左主干、左前降支、左回旋支及右冠狀動(dòng)脈中至少1支血管內(nèi)徑狹窄≥50%[15]。
1.2.2 血瘀證診斷標(biāo)準(zhǔn) 參照2016年中國(guó)中西醫(yī)結(jié)合學(xué)會(huì)活血化瘀專業(yè)委員會(huì)發(fā)布《冠心病血瘀證診斷標(biāo)準(zhǔn)》[16]制定的冠心病血瘀證調(diào)查問(wèn)卷。該問(wèn)卷由主要指標(biāo)、次要指標(biāo)和輔助指標(biāo)共14項(xiàng)組成。通過(guò)累計(jì)各項(xiàng)指標(biāo)對(duì)冠心病血瘀證診斷的貢獻(xiàn)值作為冠心病血瘀證的積分。若冠心病血瘀證積分≥19分可診斷為冠心病血瘀證;若冠心病血瘀證積分<19分,則診斷為冠心病非血瘀證。
1.3 納入標(biāo)準(zhǔn) 符合冠心病診斷標(biāo)準(zhǔn);年齡18~90歲;簽署知情同意書(shū)。
1.4 排除標(biāo)準(zhǔn) 有冠狀動(dòng)脈造影禁忌證者;白細(xì)胞增多癥、白細(xì)胞減少癥或任何血液系統(tǒng)疾病;近期合并重度高血壓、重度心律失常、肝腎功能異常、內(nèi)分泌系統(tǒng)等疾病;因精神、語(yǔ)言等因素影響資料收集者;妊娠或者哺乳期的女性患者。
1.5 方法
1.5.1 基本信息收集 收集符合納入標(biāo)準(zhǔn)的受試者基本信息,包括人口統(tǒng)計(jì)學(xué)資料[年齡、性別、體質(zhì)量指數(shù)(BMI)、抽煙],既往病史(高血壓、糖尿病、高膽固醇血癥、卒中、冠心病家族史),既往服用藥物史(阿司匹林、氯吡格雷、β受體阻滯劑、鈣離子拮抗劑、他汀類藥物、硝酸酯類藥物)。
1.5.2 指標(biāo)檢測(cè) 入院后12 h內(nèi)進(jìn)行冠心病血瘀證證候評(píng)分,以減少醫(yī)療干預(yù)對(duì)中醫(yī)證候的影響。入院后第2天早晨空腹采集外周靜脈血。全血細(xì)胞計(jì)數(shù)使用全自動(dòng)血細(xì)胞分析儀(日本,Sysmex XS-800i)進(jìn)行檢測(cè);血液生化參數(shù)使用全自動(dòng)生化分析儀(日本,Hitachi 7600-020)進(jìn)行檢測(cè),包括總膽固醇(TC)、三酰甘油(TG)、低密度脂蛋白膽固醇(LDL-C)、高密度脂蛋白膽固醇(HDL-C)、單核細(xì)胞/高密度脂蛋白膽固醇比值(MHR)、中性粒細(xì)胞/淋巴細(xì)胞比值(NLR)、空腹血糖,并完善冠狀動(dòng)脈造影檢查。
1.5.3 樣本量計(jì)數(shù) 本研究進(jìn)行預(yù)實(shí)驗(yàn),收集30例確診冠心病患者,根據(jù)血瘀證積分分為血瘀證組19例及非血瘀證組11例,計(jì)數(shù)2組患者M(jìn)HR的均數(shù)分別為δ1=17.37,δ2=15.66,標(biāo)準(zhǔn)差分別為S1=4.11,S2=3.62。因本試驗(yàn)設(shè)計(jì)屬于兩獨(dú)立樣本(計(jì)量資料),樣本計(jì)數(shù)公式為:N=[(Zα/2+Zβ)σ/δ]2(Q1-1+Q2-1)。參數(shù):1)Zα/2:α=0.05,Zα/2=1.960[Excel函數(shù)計(jì)數(shù):Zα/2=NORMSINV(1-0.05/2)];2)Zβ:β=0.20,Zβ=0.84[Excel函數(shù)計(jì)數(shù):Zβ=NORMSINV(1-0.20)];3)σ:為合并標(biāo)準(zhǔn)差σ=[(S12+S22)/2]0.5;4)δ:為2組均值的差值,δ=δ1-δ2;5)Q1、Q2:參照預(yù)試驗(yàn)結(jié)果,Q1=2/3、Q2=1/3,將各參數(shù)代入公式,計(jì)算出樣本例數(shù)N≈178,故本研究樣本量定為180例。
1.6 統(tǒng)計(jì)學(xué)方法 采用SPSS 20.0統(tǒng)計(jì)軟件進(jìn)行數(shù)據(jù)分析。正態(tài)分布的計(jì)量資料以均數(shù)±標(biāo)準(zhǔn)差(±s)表示,非正態(tài)分布以中位數(shù)M(Q1,Q3)表示;計(jì)數(shù)資料以百分率表示。符合正態(tài)分布的計(jì)量資料,兩兩比較的假設(shè)檢驗(yàn)用t檢驗(yàn),多組間均數(shù)比較釆用單因素方差分析(One-Way ANOVA)檢驗(yàn);非正態(tài)分布的計(jì)量資料用秩和檢驗(yàn)。計(jì)數(shù)資料用χ2檢驗(yàn)、Fisher′s精確概率。采用單因素線性回歸分析,分析冠心病血瘀證積分與MHR、NLR的相關(guān)性;采用多因素Logistic回歸模型校正混雜因素,分析影響冠心病血瘀證形成的獨(dú)立危險(xiǎn)因素,Model 1未校正,Model 2校正高膽固醇血癥;Model 3在Model 2基礎(chǔ)上校正TC、TG、LDL-C、HDL-C的水平;Model 4在Model 3基礎(chǔ)上校正單核細(xì)胞計(jì)數(shù)、淋巴細(xì)胞計(jì)數(shù)、中性粒細(xì)胞計(jì)數(shù)。使用受試者工作特征曲線(ROC)分析MHR對(duì)冠心病血瘀證的診斷能力。變量進(jìn)入回歸模型的檢驗(yàn)水準(zhǔn)為0.05,剔除水準(zhǔn)0.10,以P<0.05為差異有統(tǒng)計(jì)學(xué)意義。
2 結(jié)果
2.1 3組患者臨床資料比較 與對(duì)照組比較,血瘀證組和非血瘀證組平均年齡更大(P<0.05,P<0.01)。與對(duì)照組比較,有糖尿病及冠心病家族史的患者患病率更高(P<0.05);與非血瘀證組比較,血瘀證組高膽固醇血癥患病頻率更低(P<0.05),左前降支血管病變發(fā)生率更高(P<0.05),其他指標(biāo)各組之間比較差異均無(wú)統(tǒng)計(jì)學(xué)意義(均P>0.05)。與對(duì)照組比較,血瘀證組和非血瘀證組患者阿司匹林、氯吡格雷、他汀類藥物和硝酸鹽類藥物使用頻率更高(P<0.01),但是血瘀證組和非血瘀證組之間各藥物服用情況比較差異無(wú)統(tǒng)計(jì)學(xué)意義(P>0.05)。見(jiàn)表1。
2.2 3組患者實(shí)驗(yàn)室指標(biāo)比較 與對(duì)照組比較,血瘀證組患者白細(xì)胞計(jì)數(shù)、單核細(xì)胞計(jì)數(shù)、中性粒細(xì)胞計(jì)數(shù)、MHR和NLR水平更高,淋巴細(xì)胞計(jì)數(shù)、TC、TG和LDL-C水平更低(P<0.05或P<0.01)。與非血瘀證比較,血瘀證組單核細(xì)胞計(jì)數(shù)、中性粒細(xì)胞計(jì)數(shù)、MHR和NLR水平更高,而淋巴細(xì)胞計(jì)數(shù)、TC水平更低(P<0.05或P<0.01),3組之間其他實(shí)驗(yàn)室指標(biāo)比較差異無(wú)統(tǒng)計(jì)學(xué)意義(P>0.05)。見(jiàn)表1。
2.3 3組患者血瘀證積分與MHR、NLR相關(guān)性分析 對(duì)冠心病患者血瘀證積分進(jìn)行單因素線性回歸分析,以血瘀證積分作為因變量,分別以MHR、NLR作為自變量,結(jié)果顯示血瘀證積分與MHR(r=0.512,P=0.032)、NLR(r=0.592,P=0.016)正相關(guān)。見(jiàn)圖1。
2.4 冠心病血瘀證危險(xiǎn)因素分析 采用多因素Logistic回歸模型,校正血瘀證組和非血瘀證組之間差異有統(tǒng)計(jì)學(xué)意義的變量后得到MHR、NLR風(fēng)險(xiǎn)比森林圖。結(jié)果顯示,校正前MHR和NLR是冠心病血瘀證的危險(xiǎn)因素(P<0.05),校正人口學(xué)資料、血脂水平、血細(xì)胞計(jì)數(shù)后,提示MHR是冠心病血瘀證的獨(dú)立危險(xiǎn)因素(HR:0.903,95%CI為0.826~0.988,P=0.026),而NLR不是冠心病血瘀證的獨(dú)立危險(xiǎn)因素(HR:0.708,95%CI為0.501~1.001,P=0.051)。見(jiàn)圖2。
2.5 ROC分析 通過(guò)分析得出,MHR診斷冠心病患者血瘀證形成的ROC曲線下面積(AUC)為0.609(95%CI為0.521~0.696,P=0.017),其最佳數(shù)值14.15,預(yù)測(cè)的敏感度為83.9%,特異度為68.6%。見(jiàn)圖3。
3 討論
冠心病發(fā)病機(jī)制復(fù)雜,脂質(zhì)浸潤(rùn)及其介導(dǎo)的炎癥反應(yīng)是動(dòng)脈粥樣硬化的重要病理機(jī)制之一。當(dāng)血液中的脂質(zhì)含量增加,侵入動(dòng)脈壁,大量脂質(zhì)顆粒沉積在血管內(nèi)皮下,脂質(zhì)顆粒中的脂蛋白促使血管內(nèi)皮細(xì)胞產(chǎn)生多種炎癥介質(zhì),進(jìn)而激活循環(huán)中的單核細(xì)胞,同時(shí),大量的炎癥介質(zhì)會(huì)引起內(nèi)皮細(xì)胞損傷。損傷的內(nèi)皮細(xì)胞釋放多種黏附趨化因子,例如P-選擇蛋白,血管細(xì)胞黏附分子-1(VCAM-1),細(xì)胞間黏附分子-1(ICAM-1),單核細(xì)胞趨化蛋白-1(MCP-1)等,促使單核細(xì)胞的活化,遷移到內(nèi)皮,并游動(dòng)至病變部位,分化為巨噬細(xì)胞[17]。巨噬細(xì)胞通過(guò)清道夫受體吞噬氧化型低密度脂蛋白(ox-LDL),并轉(zhuǎn)變?yōu)榕菽?xì)胞[18]。大量的泡沫細(xì)胞死亡和沉積最終導(dǎo)致動(dòng)脈粥樣硬化斑塊形成。泡沫細(xì)胞能夠分泌各種炎癥和組織因子可破壞斑塊的彈性層,引起斑塊的不穩(wěn)定,并促進(jìn)斑塊的破裂[19]。因此,單核細(xì)胞作為組織中巨噬細(xì)胞和泡沫細(xì)胞的來(lái)源可以預(yù)測(cè)動(dòng)脈粥樣斑塊的進(jìn)展[20-21]。
HDL-C被稱為經(jīng)典抗動(dòng)脈粥樣硬化脂蛋白,可通過(guò)多種機(jī)制發(fā)揮抗動(dòng)脈粥樣硬化作用[5]。HDL-C可以將泡沫細(xì)胞內(nèi)的膽固醇轉(zhuǎn)運(yùn)到肝臟,促進(jìn)膽固醇(TC)從細(xì)胞外排[22];能夠調(diào)節(jié)單核細(xì)胞的活化、黏附和遷移,從而抑制炎癥反應(yīng)[23-24];能夠激活一氧化氮合酶(NOS),釋放一氧化氮(NO),使血管舒張,改善內(nèi)皮功能[25];并能夠抑制低密度脂蛋白氧化[26]。HDL-C通過(guò)以上多種機(jī)制保護(hù)心血管系統(tǒng),故在一定程度上,高水平HDL-C可改善動(dòng)脈粥樣硬化并減少心血管事件發(fā)生[27]。
MHR是單核細(xì)胞與HDL-C比值,是一種新型的炎癥和氧化應(yīng)激的標(biāo)志物,與其他特異性炎癥介質(zhì)比較,MHR作為臨床常規(guī)檢查,具有易于獲得且價(jià)格低廉的優(yōu)勢(shì),同時(shí)具有較好的敏感度,能夠反映機(jī)體炎癥反應(yīng)程度[7]。多項(xiàng)研究證實(shí),MHR與冠心病患者冠脈嚴(yán)重程度及預(yù)后密切相關(guān)。Akboga等[28]發(fā)現(xiàn)MHR與SYNTAX評(píng)分呈正相關(guān),Canpolat等[7]證實(shí)MHR與冠脈慢血流的發(fā)生密切相關(guān)。Cetin等[29]指出MHR可作為ST段抬高型心肌梗死(STEMI)患者經(jīng)皮冠脈介入治療(PCI)術(shù)后支架內(nèi)血栓形成的獨(dú)立預(yù)測(cè)因子。Akgz等[8]也發(fā)現(xiàn)MHR與STEMI患者住院期間和5年主要心血管不良事件以及死亡率獨(dú)立相關(guān)。此外,也發(fā)現(xiàn)MHR是慢性腎臟病患者心血管終末事件獨(dú)立預(yù)測(cè)因子[30]。
血瘀證是冠心病最主要的證型,尋找血瘀證與理化指標(biāo)的關(guān)系,有助于更好地理解、更完整地解釋血瘀證的形成機(jī)制,更準(zhǔn)確客觀地辨別血瘀證與其他證候,有助于提高中醫(yī)藥療效,以及建立完善的療效評(píng)價(jià)體系。已有研究發(fā)現(xiàn),血瘀證與凝血因子的異常、血小板的活化和血液流變學(xué)異常有關(guān)[31-33]。血瘀證與慢性炎癥和脂質(zhì)代謝紊亂的相關(guān)性也在近幾年被研究者重視。Huang等[34]發(fā)現(xiàn)冠心病血瘀證患者CD14+CD16+單核細(xì)胞亞群及其下游的炎癥細(xì)胞因子如TNF-α和IL-1的蛋白水平高于非血瘀證的冠心病患者。Ma等[35]研究冠心病血瘀證的差異基因表達(dá)譜,結(jié)果顯示炎癥及免疫相關(guān)基因在冠心病血瘀證病理形成過(guò)程中發(fā)揮一定的作用。Wang等[36]分析冠心病血瘀證潛在代謝組學(xué)譜,發(fā)現(xiàn)脂質(zhì)代謝紊亂是導(dǎo)致冠心病血瘀證主要因素之一。這些結(jié)果表明脂質(zhì)驅(qū)動(dòng)的炎癥反應(yīng)與冠心病血瘀證的發(fā)病機(jī)制密切相關(guān),可能是冠心病血瘀證形成的物質(zhì)基礎(chǔ)之一。本研究結(jié)果顯示,MHR是冠心病血瘀證的獨(dú)立危險(xiǎn)因素(HR:0.903,95%CI為0.826~0.988,P=0.026)。ROC分析顯示,MHR診斷冠心病血瘀證的最佳臨界值為14.15,敏感度為83.9%,特異度為68.6%(AUC:0.609,95%CI為0.521~0.696,P=0.017),提示MHR診斷冠心病血瘀證具有良好的敏感度。
應(yīng)用現(xiàn)代科學(xué)技術(shù)對(duì)中醫(yī)病證進(jìn)行深入研究,增加辨證的客觀性、準(zhǔn)確度,為中醫(yī)臨床客觀辨證標(biāo)準(zhǔn)化提供依據(jù)是本試驗(yàn)的出發(fā)點(diǎn)。MHR作為常規(guī)的臨床檢查,具有易于獲得和具有成本效益的優(yōu)點(diǎn),將其應(yīng)用于輔助冠心病血瘀證臨床診斷和鑒別,具有良好的臨床應(yīng)用價(jià)值。本研究發(fā)現(xiàn)MHR是冠心病血瘀證的獨(dú)立危險(xiǎn)因素,并具有一定的診斷價(jià)值,提示脂質(zhì)驅(qū)動(dòng)的炎癥反應(yīng)可能是冠心病血瘀證形成病理機(jī)制之一。本研究仍存在不足之處。首先,本研究為單中心研究小樣本研究;其次,未選擇具有特異性,廣泛接受的炎癥標(biāo)志物來(lái)對(duì)比闡明MHR在冠心病血瘀證診斷中的價(jià)值。未來(lái)仍需要大樣本臨床研究,從多個(gè)角度、多個(gè)層面去探討冠心病血瘀證與MHR的關(guān)系。
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(2020-09- 11收稿 責(zé)任編輯:芮莉莉)