楊建峰 魏經(jīng)漢
慢性心力衰竭患者血清可溶性腫瘤壞死因子受體Ⅰ、腫瘤壞死因子-α含量及臨床意義
楊建峰 魏經(jīng)漢
目的 旨在探討慢性心力衰竭患者血清可溶性腫瘤壞死因子受體-I(sTNFR-Ⅰ)、腫瘤壞死因子-α(TNF-α)含量及其臨床意義。方法 慢性心衰組包括62例慢性心力衰竭患者,按心功能分級(jí)(NYHA)又分為3個(gè)組:Ⅱ級(jí)組20例,Ⅲ級(jí)組20例,Ⅳ級(jí)組22例,另設(shè)15例健康人作對(duì)照。血清sTNFR-Ⅰ、TNF-α含量測(cè)定采用酶聯(lián)免疫吸附法(ELISA)。結(jié)果 結(jié)果顯示慢性心力衰竭患者血清sTNFR-Ⅰ、TNF-α含量顯著高于健康對(duì)照組,慢性心力衰竭患者心功能分級(jí)組間血清、sTNFR-Ⅰ、TNF-α含量也有顯著差異,心功能Ⅳ級(jí)組顯著高于心功能Ⅱ級(jí)組、Ⅲ級(jí)組。結(jié)論 慢性心力衰竭患者血清sTNFR-Ⅰ、TNF-α含量的變化參與慢性心力衰竭致病機(jī)制,它們之間可能還有相互作用及影響,共同參與慢性心力衰竭的發(fā)病機(jī)制。
心力衰竭;細(xì)胞因子;可溶性腫瘤壞死因子受體-Ⅰ;腫瘤壞死因子-α
近年來的研究表明多種細(xì)胞因子與心力衰竭有關(guān),通過免疫、炎癥反應(yīng)參與心力衰竭的病理及病理生理過程[1]。研究旨在探討慢性心力衰竭患者血清可溶性腫瘤壞死因子受體-I(sTNFR-Ⅰ)、腫瘤壞死因子-α(TNF-α)含量及臨床意義。
1.1 一般資料 慢性心力衰竭組:入選對(duì)象為各種心臟病所致的不同程度的慢性心力衰竭患者,并排除同時(shí)患有自身免疫性疾病、腫瘤及嚴(yán)重肝功能損害者。按上述標(biāo)準(zhǔn)共篩選收集慢性心力衰竭患者62例,平均年齡(52.06±14.09)歲,男40例、女22例,其中心肌病17例,冠心病22例、瓣膜病18例,高血壓性心臟病5例,按NYHA心功能分級(jí)標(biāo)準(zhǔn)Ⅱ級(jí)組20例,平均年齡(47.6±16.08)歲,男12例,女8例,Ⅲ級(jí)組20例,平均年齡(55.9±13.62)歲,男11例,女9例,Ⅳ級(jí)組22例,平均年齡(52.33±12.42)歲,男16例,女6例。對(duì)照組為15例體檢健康無任何心臟病證據(jù)志愿者,平均年齡(47.8± 16.5)歲,男9例,女6例。
1.2 測(cè)定方法 入選患者于入院第2天清晨平臥位、空腹取肘靜脈血5 ml,按血清sTNFR-Ⅰ、TNF-α測(cè)定試劑盒說明書處理血標(biāo)本,分離血清,分裝2支1 ml離心管中置于-40℃低溫冰箱(NABILA公司,意大利)凍存待測(cè)。血清sTNFR-Ⅰ、TNF-α含量測(cè)定采用酶聯(lián)免疫吸附法(ELISA),試劑盒為美國(guó)Genzyem公司產(chǎn)品。
1.3 統(tǒng)計(jì)學(xué)方法 采用SPSS 11.5軟件包對(duì)數(shù)據(jù)進(jìn)行統(tǒng)計(jì)分析,數(shù)據(jù)采用均數(shù)±標(biāo)準(zhǔn)差(±s)表示,采用t檢驗(yàn),方差不齊采用t'檢驗(yàn),多組間比較采用方差分析q檢驗(yàn),P<0.05為差異有統(tǒng)計(jì)學(xué)意義。
2.1 慢性心力衰竭患者血清sTNFR-Ⅰ、TNF-α含量變化(表1)慢性心力衰竭者血清sTNFR-Ⅰ、TNF-α含量與健康對(duì)照組相比均顯著升高(P<0.01)。
表1 慢性心力竭患者血清sTNFR-Ⅰ、TNF-α含量
2.2 慢性心力衰竭患者各級(jí)心功能組血清sTNFR-Ⅰ、TNF-α水平變化(表2)。
表2 慢性心力衰竭患者各級(jí)心功能組血清sTNFR-Ⅰ、TNF-α含量
2.2.1 各級(jí)心功能組血清sTNFR-Ⅰ含量變化 慢性心力衰竭患者心功能Ⅱ級(jí)組,Ⅲ級(jí)組、Ⅳ級(jí)組血清sTNFR-1含量與健康對(duì)照組比較均顯著升高(P<0.01),Ⅲ級(jí)組顯著高于Ⅱ級(jí)組(P<0.01),Ⅳ級(jí)組顯著高于Ⅱ級(jí)組,Ⅲ級(jí)組(P<0.01);表明隨心力衰竭嚴(yán)重程度的增加,慢性心力衰竭患者血清sTNFR-Ⅰ含量也升高。
2.2.2 各級(jí)心功能組血清TNF-α含量變化 慢性心力衰竭患者心功能Ⅱ級(jí)組,Ⅲ級(jí)組血清TNF-α含量與健康對(duì)照組比較含量增高,差異無統(tǒng)計(jì)學(xué)意義(P>0.05),Ⅱ級(jí)組與Ⅲ級(jí)組間比較,差異無統(tǒng)計(jì)學(xué)意義(P>0.05),但Ⅳ級(jí)組含量顯著高于其他3組(P<0.01)。
TNF-α是一個(gè)多向性細(xì)胞因子,體內(nèi)除激活的巨噬細(xì)胞表達(dá)TNF-α外,心力衰竭時(shí)衰竭心肌細(xì)胞也可表達(dá)TNF-α,而非衰竭心肌細(xì)胞則無表達(dá)。慢性心力竭的許多臨床特征,如左室功能不全、肺水腫、心肌病變以及心衰惡液質(zhì)的發(fā)生都與已知的TNF-α生物學(xué)活性有關(guān)[2,3]。有研究發(fā)現(xiàn)TNF-α與慢性心力衰竭的心肌收縮功能減退、心室重構(gòu)有關(guān)。TNF-α具負(fù)性肌力作用是由于心肌細(xì)胞除極反應(yīng)的鈣電流依賴性電壓降低和肌漿網(wǎng)儲(chǔ)備釋放所致,這種效應(yīng)至少部分通過增加NO合成所介導(dǎo),TNF-α增加慢性心力衰竭患者誘導(dǎo)型No的表達(dá)與合成[4]。TNF-α能加速蛋白合成,減慢分解速度,使肌動(dòng)蛋白、肌球蛋白合成增加,導(dǎo)致心肌肥厚。此外,TNF-α還可引起左室壁變薄,左室擴(kuò)大,心室舒張末內(nèi)徑增大[5]。TNF-α還與心肌細(xì)胞凋亡有關(guān)心肌細(xì)胞凋亡導(dǎo)致有生機(jī)心肌細(xì)胞進(jìn)行性丟失,心肌細(xì)胞總量下降,左室壁變薄、纖維化,左室功能進(jìn)行性惡化,心室重構(gòu)[6,7]??傊琓NF-α參與慢性心力衰竭的致病機(jī)制。
sTNFR-Ⅰ是細(xì)胞膜受體TNFR-I脫落形成的,sTNFR-Ⅰ可以通過與TNF-α結(jié)合或阻礙TNF-α與細(xì)胞膜上TNFR-I受體結(jié)合來凋節(jié)TNF-α的生物活性[8],有研究表明,sTNFR– I是急性心肌梗死患者發(fā)生心力衰竭和死亡的近期和遠(yuǎn)期預(yù)測(cè)因子[9],因此,慢性心力衰竭患者血清 sTNFR-Ⅰ水平升高可能是機(jī)體對(duì)循環(huán)TNF-α水平升高的調(diào)節(jié)反應(yīng),通過凋節(jié)TNF-α的生物活性參與慢性衰竭的致病過程,但其對(duì)慢性心力衰竭影響及機(jī)制有待進(jìn)一步研究。
本組研究結(jié)果顯示慢性心力衰竭患者血清sTNFR-Ⅰ、TNF-α水平顯著高于健康對(duì)照組,并且隨著心功能的惡化有升高趨勢(shì),提示兩者與心力衰竭的嚴(yán)重程度有關(guān),能否作為判斷慢性心力衰竭嚴(yán)重程度的一項(xiàng)指標(biāo)有待進(jìn)一步探討。結(jié)合sTNFR-Ⅰ、TNF-α生物學(xué)活性,慢性心力衰竭時(shí)循環(huán)sTNFR-Ⅰ、TNF-α水平顯著升高參與慢性心力衰竭的致病機(jī)制,它們之間可能還有相互作用及影響,共同參與慢性心力衰竭的發(fā)病機(jī)制。
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Serum concentrations of soluble tumor necrosis factor receptor-I、tTumor necrosis factor-αand the clini- cal significance in the patients with chronic heart failure
YANG Jian-feng,WEI Jing-han.Department of Cardiovascular Medicine,The Fifth Affliated Hospital of Zhengzhou University,Zhengzhou 450052,China
ObjectiveTo investigate concentrations of serum soluble tumor necrosis factor receptor-I (sTNFR-Ⅰ),serum tumor necrosis factor(TNF-α)and clinical significance in the patients with chronic heart failure(CHF).MethodsCHF group included 62 patients,sixty-two patients were devided into three groups according to cardiac function(NYHA classification),classⅡ group included 20 patients,classⅢ group included 20 patients,classⅣ group included 22 patients.Healthy control group included 15 healthy volunteers. Serum concentrations of sTNFR-Ⅰ and TNF-α were measured by enzyme-liked immune-absorbent assay (ELISA).Results The results were shown that serum concentrations of sTNFR-Ⅰ and TNF-α in the patients with CHF were significantly higher than these in healthy control group,serum levels of sTNFR-Ⅰ and TNF-α in three groups according to cardiac function were also significant difference.ConclusionChanges of serum concentrations of sTNFR-Ⅰ and TNF-αin the patients with CHF would play a role in the pathogenic mechanism of chronic heart failure,they maybe interact and influence each other in the pathogenic mechanism of chronic heart failure.
Heart failure;Cytokine;sTNFR-Ⅰ;TNF-α
450052 河南省鄭州大學(xué)五附院心內(nèi)科(楊建峰);鄭州大學(xué)一附院心內(nèi)科(魏經(jīng)漢)