Immune function of peripheral T cells in patients with venous thromboembolism or coronary artery atherosclerosis

Introduction and Objectives: Recent studies have shown that the major risk factors for arterial thrombotic diseases are closely associated with venous thromboembolism (VTE). This study aimed to investigate the expression of CD3, CD4 and CD8 in T lymphocytes, the CD4/CD8 ratio and high-sensitivity C-...

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Main Authors: Lin Zhou, Haoming Song, Wenjun Xu, Jiahong Xu, Jinfa Jiang, Zhu Gong, Yang Liu, Wenwen Yan, Lemin Wang
Format: Article
Language:English
Published: Elsevier 2014-06-01
Series:Revista Portuguesa de Cardiologia (English Edition)
Online Access:http://www.sciencedirect.com/science/article/pii/S2174204914001524
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Summary:Introduction and Objectives: Recent studies have shown that the major risk factors for arterial thrombotic diseases are closely associated with venous thromboembolism (VTE). This study aimed to investigate the expression of CD3, CD4 and CD8 in T lymphocytes, the CD4/CD8 ratio and high-sensitivity C-reactive protein (hs-CRP) levels in patients with VTE, coronary artery atherosclerosis (CAA) and healthy subjects. Methods: A total of 82 healthy subjects, 51 VTE patients and 114 CAA patients were recruited, and the expression of CD3, CD4 and CD8 in T lymphocytes and the CD4/CD8 ratio were determined. Serum hs-CRP was also measured. Results: Compared to healthy subjects, VTE patients had significantly reduced CD3 expression (p=0.019), comparable CD4 expression (p=0.868), significantly reduced CD8 expression (p<0.001) and increased CD4/CD8 ratio (p=0.044). However, VTE patients had comparable expression of CD3, CD4 and CD8 and CD4/CD8 ratio to CAA patients. In addition, among patients with VTE or CAA, the proportion of patients with reduced CD3+ and CD8+ T lymphocytes or increased CD4/CD8 ratio was significantly higher than in healthy subjects. In addition, hs-CRP in both VTE and CAA groups was significantly higher than in healthy subjects. Conclusions: The antigen recognition and signal transduction activation of T cells is significantly reduced in patients with VTE or CAA, and the killing effect of T cells on pathogens, including viruses, is also significantly compromised. In addition, inflammatory and immune mechanisms are involved in the occurrence and development of venous and arterial thrombosis. Resumo: Introdução e objetivos: Estudos recentes mostraram que os fatores de risco major das doenças trombóticas arteriais estão de forma muito próxima relacionados com a trombose venosa. Este estudo visou investigar as expressões CD3, CD4 e CD8 nos linfócitos T, a razão CD4/CD8 e a proteína reativa-C de alta sensibilidade (HsCRP) nos doentes com tromboembolismo venoso (TEV), com aterosclerose das artérias coronárias (AAC) e nos indivíduos saudáveis. Métodos: Foi recrutado um total de 82 indivíduos saudáveis, de 51 doentes com TEV e de 114 doentes com AAC e foram determinadas as expressões CD3, CD4 e CD8 nos linfócitos T e razão CD4/CD8. Foi também determinada a HsCRP sérica. Resultados: Quando comparados com os indivíduos saudáveis, os doentes com TEV tiveram expressões significativamente reduzidas: CD3 (p=0,019) comparável com a expressão CD4 (p=0,868) e CD8 (p<0,001) e razão CD4/CD8 (p=0,044) aumentada. No entanto, os doentes com TEV tiveram expressões CD3, CD4 e CD8 e razão CD4/CD8 comparáveis aos doentes com AAC. Além disso, os resultados mostraram, nos doentes com TEV ou AAC, a proporção de doentes com expressão CD3+ reduzida e linfócitos CD8+T ou razão CD4+/CD8+ ou razão aumentada CD4+/CD8+ significativamente aumentada, quando comparados com os indivíduos saudáveis. Além disso, a HsCRP no grupo com TEV e no grupo com AAC foi significativamente superior do que no grupo dos indivíduos saudáveis. Conclusão: O reconhecimento do antigénio e a ativação do sinal da transdução das células T estão significativamente reduzidos nos doentes com TEV ou com AAC e o efeito mortífero das células T nos patogéneos, incluindo os vírus, está significativamente comprometido. Além disso, os mecanismos inflamatórios e imunológicos estão envolvidos na ocorrência e no desenvolvimento da trombose venosa e arterial. Keywords: Immune function, T cell, Venous thromboembolism, Coronary atherosclerosis, Palavras-chave: Função imunológica, Célula T, Tromboembolismo venoso, Aterosclerose coronária
ISSN:2174-2049