关键词:心力衰竭;β1-受体;M2-受体
摘要:目的 本研究拟对不同心脏病所致的心力衰竭(CHF) 患者,检测心脏β1 和M2 受体的自身抗体,探讨心功能发生病理变化时,这两种自身抗体的产生与疾病发生、发展的相关性。方法 以细胞外第二环表位肽段的合成肽作为抗原,应用酶联免疫吸附测定(ELISA) 技术,随机检测265 例受试者血清中心脏β1 和M2 受体的自身抗体。结果 CHF 组β1受体自身抗体的阳性率为45.7 % (86/188) ,明显高于对照组的10.4 % (8/77) (P<0.01);CHF组M2 受体自身抗体的阳性率为49.5 % (93/188) ,明显高于对照组的11.7 % (9/77) (P<0.01);心功能Ⅱ-Ⅲ级(NYHA心功能分级)的患者自身抗体的阳性率及抗体滴度明显高于Ⅳ级;CHF组β1受体自身抗体阳性血清中高达56.1 %的患者同时具有M2 受体的自身抗体。结论 心脏β1和M2 受体自身抗体存在于多种心脏病所致心力衰竭患者的血清中,可能与心力衰竭时心肌结构变化和功能下降有关;β1 和M2 受体的双抗体阳性可能是自身免疫反应的多重性表现,提示免疫学机制参与心力衰竭和/ 或心肌重构的病理生理过程,参与的程度在疾病的早、中期大于晚期。
摘要:目的 本研究拟对不同心脏病所致的心力衰竭(CHF) 患者,检测心脏β1 和M2 受体的自身抗体,探讨心功能发生病理变化时,这两种自身抗体的产生与疾病发生、发展的相关性。方法 以细胞外第二环表位肽段的合成肽作为抗原,应用酶联免疫吸附测定(ELISA) 技术,随机检测265 例受试者血清中心脏β1 和M2 受体的自身抗体。结果 CHF 组β1受体自身抗体的阳性率为45.7 % (86/188) ,明显高于对照组的10.4 % (8/77) (P<0.01);CHF组M2 受体自身抗体的阳性率为49.5 % (93/188) ,明显高于对照组的11.7 % (9/77) (P<0.01);心功能Ⅱ-Ⅲ级(NYHA心功能分级)的患者自身抗体的阳性率及抗体滴度明显高于Ⅳ级;CHF组β1受体自身抗体阳性血清中高达56.1 %的患者同时具有M2 受体的自身抗体。结论 心脏β1和M2 受体自身抗体存在于多种心脏病所致心力衰竭患者的血清中,可能与心力衰竭时心肌结构变化和功能下降有关;β1 和M2 受体的双抗体阳性可能是自身免疫反应的多重性表现,提示免疫学机制参与心力衰竭和/ 或心肌重构的病理生理过程,参与的程度在疾病的早、中期大于晚期。
Abstract:Objective:To determine whether autoantibodies against
β1-adrenergic and M2-muscarinic receptors are related to patient s
with conge stive heart failure (CHF).Methods:Both synthetic
peptides corresponding to amino acids sequence 197 - 222 and 169 -
173 of the second extracellular loops of the β1 and M2 receptors
were used a s antigens to screen sera from 265 patients.
Results:Positive sera forβ1-adrenergic receptor was found in 45.73
% (86/188) of CHF patients , while in the controls it was
10.14%(8/77)(P<0.01);positive sera for M2-muscarinic
receptor in CHF patients was found in 49.5%(99/188),while in the
control it was 11.7%(9/77)(P< 0.01) . The positive
ratio of autoantibodies against β1-adrenergic and M2-muscarinic
receptors in CHF patient s with cardiac function Class Ⅱ-Ⅲ(NYHA)
were significantly higher than cardiac function class Ⅳ.The average
titer of autoantibodies against β1-adrenergic and M2-muscarinic
receptors of the former was significantly higher than the latter ;
56.1 % of patient s with autoantibodies against β1-adrenergic
receptor had autoantibodie s against M2-muscarinic
receptor.Conclusions:Autoantibodies against β1-adrenergic receptor
and M2-muscarinic receptor were found in sera from heart failure
patients with different cardiac diseases. We propose that
autoantibodie s against β1 and M2 receptors are not only related to
the IDCM , but also to cardiac structural and functional
changes.
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