Stroke:软骨寡聚基质蛋白能够提示动脉粥样硬化斑块的易损性!

2020-03-03 shaosai MedSci原创

细胞外基质蛋白不仅能够影响斑块的稳定性,而且还能通过调整炎性反反应影响细胞内活动,其在动脉粥样硬化性疾病中非常重要。软骨寡聚基质蛋白(COMP)由平滑肌细胞表达并存在于健康人血管中。近期有研究发现将COMP表达缺失的骨髓移植到apoE-/- 小鼠上会导致动脉粥样硬化斑块形成增加,这表明骨髓中COMP的作用。尽管已有COMP在小鼠动脉粥样硬化性斑块形成的作用的证据,但尚无COMP在人类动脉粥样硬化性

背景

细胞外基质蛋白不仅能够影响斑块的稳定性,而且还能通过调整炎性反反应影响细胞内活动,其在动脉粥样硬化性疾病中非常重要。软骨寡聚基质蛋白(COMP)由平滑肌细胞表达并存在于健康人血管中。近期有研究发现将COMP表达缺失的骨髓移植到apoE-/- 小鼠上会导致动脉粥样硬化斑块形成增加,这表明骨髓中COMP的作用。尽管已有COMP在小鼠动脉粥样硬化性斑块形成的作用的证据,但尚无COMP在人类动脉粥样硬化性疾病中作用的证据。

目的与方法

本研究旨在评估是否COMP与人类动脉粥样硬化斑块稳定性的相关性。利用免疫组织化学方法评估对211处颈动脉斑块进行评价COMP的表达情况,分析其与稳定或易损性动脉粥样硬化性斑块的相关性。

结果

与无症状动脉粥样硬化性斑块相比(n=101; 9.7% [4.7-14.3] versus 5.6% [2.8-9.8]; P=0.0002),症状性动脉粥样硬化性斑块患者(n=110) COMP染色阳性的斑块内面积与症状具有显着相关性。COMP与斑块脂质(r=0.32; P=0.000002)、CD68细胞(r=0.15; P=0.036)具有阳性相关性,与胶原(r=-0.16; P=0.024)、弹力蛋白(r=-0.14; P=0.041)和平滑肌细胞(r=-0.25; P=0.0002)具有负相关。COMP与CD163(r=0.37; P=0.00000006)、斑块内出血(血型糖蛋白染色)(r=0.28; P=0.00006)具有阳性相关性,CD163为血红蛋白、结合珠蛋白的清道夫受体,能够生成Mhem巨噬细胞。

结论

本研究表明,COMP与症状性颈动脉粥样硬化性症、CD163表达细胞及人类易损性动脉粥样硬化性斑块具有相关性。

原始出处:

Hultman K, Edsfeldt A, Bj?rkbacka H, et al,Cartilage Oligomeric Matrix Protein Associates With a Vulnerable Plaque Phenotype in Human Atherosclerotic Plaques.Stroke. 2019.DOI:10.1161/STROKEAHA.119.026457

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    2020-03-03 1478fa69m73暂无昵称

    学习了

    0