OX40-OX40L interaction targets NFATc1 in ApoE-/- mice during atherogenesis. (12th October 2011)

• Record Type: Journal Article
• Authors: Yan, Jinchuan; Xu, Liangjie; Nagaraj, Chandran; Tang, Bi; Gong, Jie; Liu, Peijing; Wang, Cuiping; Chen, Guanghua
• Is Part Of: Heart. Volume 97(2011)Supplement 3
• Page Start: A26
• Page End: A26
• Publication Date: 2011-10-12
• Subjects: Heart -- Diseases -- Treatment -- Periodicals; Cardiology -- Periodicals; 616.12
• DOI: 10.1136/heartjnl-2011-300867.75
• Languages: English
• ISSNs: 1355-6037

Abstract

Abstract : Background: We have previously reported the emerging role of OX40-OX40L interaction in inflammation and atherosclerosis. However, the mechanism of OX40-OX40L interaction contribution towards pathogenesis has been poorly understood. Aim: To investigate the effect of OX40-OX40L interaction on the nuclear factor of activated T cells c1(NFATc1) in ApoE -/- mice. Atherosclerotic plaque was induced by rapid perivascular carotid collar placement in ApoE -/- mice. The expression of OX40, OX40L and NFATc1 in lymphocytes was measured by Real Time PCR (RT-PCR) and flow cytometry (FCM), respectively. The presence of NFATc1 in the atherosclerotic plaque was detected by immunohistochemistry. The level of IL-4 was measured by ELISA. We found that the expression of NFATc1 was significantly elevated both in atherosclerotic lesion and in leukocytes from ApoE -/- mice. In vitro, after stimulating OX40-OX40L interaction, the expression level of NFATc1 mRNA and protein was significantly increased in lymphocytes, while anti-OX40LmAb significantly suppressed the expression of NFATc1 in leukocytes, Moreover substantially elevated level of IL-4 was induced by anti-OX40 mAb, while NFATc1 inhibitor markedly suppressed production of IL-4. The current study suggested that OX40-OX40L interaction regulates the expression of NFATc1, which may play a critical role in atherosclerotic plaque formation, which might also have implications with pathophysiology of atherosclerosis.