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Author Kumaran, C. ♦ Shivakumar, K.
Source Sree Chitra Tirunal Institute for Medical Sciences & Technology
Content type Text
Publisher Free Radical Biology and Medicine
File Format PDF
Language English
Subject Domain (in DDC) Technology ♦ Medicine & health ♦ Diseases
Subject Domain (in MeSH) Cardiovascular Diseases ♦ Diseases
Subject Keyword Cardiology
Abstract Magnesium deficiency is known to produce myocardial fibrosis in different animal models, but the underlying mechanisms are unclear. However, circulating levels of pro-oxidant and mitogenic factors are reported to be elevated in a rodent model of acute magnesium deficiency, suggesting a role for humoral factors in the pathogenesis of the cardiovascular lesions. Probing the mechanism of cardiac fibrogenesis in magnesium deficiency, the present study furnished evidence that serum from magnesium-deficient rats has a more marked effect than serum from magnesium-sufficient rats on mitogenesis, net collagen production, and superoxide generation in cardiac fibroblasts from young adult rats. The enhanced mitogenic response was abolished by superoxide dismutase and N-acetyl cysteine, showing that it is mediated by superoxide anion. Further, a modest inhibitory effect of the neurokinin-1 receptor antagonist, spantide, suggested that factors acting via neurokinin-1 receptors may partly modulate cardiac fibroblast function in magnesium deficiency. The findings are consistent with the postulation that serum factors may activate cardiac fibroblasts via a superoxide-mediated mechanism and contribute to the fibrogenic response in the heart in magnesium deficiency. (C) 2001 Elsevier Science Inc.
Education Level UG and PG
Learning Resource Type Article
Educational Framework Medical Council of India (MCI)
Volume Number 31
Issue Number 7
Page Count 5
Starting Page 882
Ending Page 886