Actin is a target of t-cell reactivity in patients with advanced carotid atherosclerotic plaques

Elisabetta Profumo, Brigitta Buttari, Linda Petrone, Giada Lacroce, Maria Chiara Tesori, Raffaele Capoano, Bruno Salvati, Rachele Riganò

Research output: Contribution to journalArticlepeer-review

Abstract

Atherosclerosis is a chronic inflammatory disease of the arterial wall associated with autoimmune reactions. In a previous study, we observed the presence of actin-specific antibodies in sera from patients with carotid atherosclerosis. To extend our previous results we evaluated the possible role of actin as antigenic target of cell-mediated immune reactions in carotid atherosclerosis. Peripheral blood mononuclear cells (PBMC) from 17 patients and 16 healthy subjects were tested by cell proliferation assay and by ELISA for cytokine production. Actin induced a proliferative response in 47% of patients' PBMC samples, with SI ranging from 2.6 to 21.1, and in none of the healthy subjects' samples (patients versus healthy subjects, P=0.02). The presence of diabetes in patients was significantly associated with proliferative response to actin (P=0.04). IFN-γ and TNF-α concentrations were higher in PBMC from patients than in those from healthy subjects and in PBMC proliferating to actin than in nonproliferating ones. Our data demonstrate for the first time a role of actin as a target autoantigen of cellular immune reactions in patients with carotid atherosclerosis. The preferential proinflammatory Th1 activation suggests that actin could contribute to endothelial dysfunction, tissue damage, and systemic inflammation in carotid atherosclerosis.

Original languageEnglish
Article number261054
JournalMediators of Inflammation
Volume2013
DOIs
Publication statusPublished - 2013

ASJC Scopus subject areas

  • Immunology
  • Cell Biology

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