心源性猝死患者心肌SOCS-1和SOCS-3表达的研究

目的 探讨心源性猝死(sudden cardiac death,SCD)患者心肌中细胞因子信号转导抑制分子-1(suppressor of cytokine signaling-1,SOCS-1)和SOCS-3的表达及临床意义.方法 取2005-2006年中山大学法医学系的尸检心肌标本24例,其中9例尸检符合冠状动脉粥样硬化(非心肌梗死)导致SCD(简称非心梗组),7例尸检符合急性心肌梗死猝死(简称心梗组),对照组8例选择了因交通事故、外伤等所致死亡的患者.以RT-PCR法检测对照组、非心梗组和心梗组心肌中SOCS-1,SOCS-3的mRNA表达,用免疫组化法检测对照组、非心梗组和心梗组心肌中SOCS-1,SOCS-3的蛋白表达.数据以SPSS13.0统计学软件处理,采用方差分析检验.结果 非心梗组和心梗组患者心肌中SOCS-1 mRNA,SOCS-3 mRNA的表达量均显著高于对照组,分别为(0.788±0.101),(0.741±0.111)vs.(0.436±0.044),P<0.01],及(0.841±0.092),(0.776±0.070)vs.(0.454±0.076),P<0.01].非心梗组和心梗组患者心肌中SOCS-1的蛋白抗体阳性细胞数均显著高于对照组,分别为(320.00±48.48),(347.14±70.88)vs.(42.50±10.35),P<0.01].非心梗组和心梗组患者心肌中SOCS-3的蛋白抗体阳性细胞数均显著高于对照组,分别为(381.11±59.25)vs.(40.00±10.69),P<0.01]和(332.86±111.91)vs.(40.00±10.69),P<0.01].结论 冠心病所致SCD患者的心肌中SOCS-1,SOCS-3的表达显著增加,提示它们可能参与了SCD的发病机制.

Preliminary observation of the expressions of SOCS-1 and SOCS-3 in myocardium of patients with sudden cardiac death

Objective To investigate the expressions and clinical significanees of suppressors of cytokine signaling-1 (SOCS-1) and SOCS-3 in myocardium of patients with sudden cardiac death (SCD). Method This study included myocardial autopsy specimens of 24 patients admitted between 2005 and 2006. Of them, 9 cases had the findings of autopsy examination consistent with coronary atberosclerosis (non-myocardial infarction) leading to SCD (non-MI group), 7 patients died of acute myocardial infarction (MI group) and 8 patients died of traffic accidents and trauma The expressions of SOCS-1 mRNA and SOCS-3 mRNA in the myocardium of non-MI and con-trol group were detected by using RT-PCR. The levels of SOCS-1 protein and SOCS-3 protein were detected by us-ing immunohistochemistry. Statistical analysis were performed by using SPSS version 13.0 software and the data were processed with ANOVA test. Results The expressions of SOCS-1 mRNA and SOCS-3 mRNA in non-MI and MI groups were were significantly higher than those in control group (0. 788±0. 101) and (0. 741±0.111) vs.(0.436±0.044) (P <0.01); (0.841±0.092) and (0.776±0.070) vs.(0.454±0.076), P <0.01, re-spectively). The antibody-positive cells of SOCS-1 protein in myocardium of non-MI group and MI group were significantly higher than those in myoeardium of control group (320.00±48.48) and (347.14±70.88) vs.(42.50±10.35) (P < 0.01), respectively. The antibody-positive cells of SOCS-3 protein in myoeardium of non-MI group and MI group were significantly higher than those in myocardium of control group (381.11±59.25) vs.(40.00±10.69), (P < 0.01)and (332.86±111.91) vs. (40.00±10.69), (P =0.001). Conclusions The expressions of SOCS rnRNA and SOCS-3 mRNA in myoeardium of patients with SCD from coronary diseases are significantly increased contributing to the pathogenesis of SCD.