Access Restriction

Author Preeta, R. ♦ Nair, R. R.
Source Sree Chitra Tirunal Institute for Medical Sciences & Technology
Content type Text
Publisher Journal of Molecular and Cellular Cardiology
File Format PDF
Language English
Subject Domain (in DDC) Technology ♦ Medicine & health ♦ Diseases
Subject Domain (in MeSH) Cardiovascular Diseases ♦ Diseases
Subject Keyword Cardiology
Abstract Cardiac fibroblasts play a multifarious role in the maintenance of the functional and structural integrity of the heart. Therefore inadvertent proliferation of these fibroblasts can affect the normal functioning of the heart. The proliferation of fibroblasts could be due to various factors. We have worked on the hypothesis that low levels of cerium may stimulate cardiac fibroblasts to undergo proliferation and that free radicals act as the mediators of the stimulatory response. Cardiac fibroblasts isolated from neonatal Wistar rats were cultured. Proliferation of the cells was measured by cell count and immunohistochemical visualization for proliferating cell nuclear antigen, The response to cerium was assessed by comparison with control. A stimulatory response at low levels of cerium was observed with a peak at 0.5 mu M concentration of cerium. A concomitant increase in the generation of free radicals was also seen. The cerium-stimulated cell proliferation and free radical generation was neutralized by the inclusion of superoxide dismutase in the culture medium.Conclusion: Low doses of cerium, at levels comparable to those found in the serum of patients with EMF, has a stimulatory effect on cardiac fibroblasts and the abrogation of proliferation by antioxidant superoxide dismutase indicates that superoxide anion acts as a biological intermediate in cerium-induced cardiac fibroblast proliferation. (C) 1999 Academic Press.
Education Level UG and PG
Learning Resource Type Article
Educational Framework Medical Council of India (MCI)
Volume Number 31
Issue Number 8
Page Count 8
Starting Page 1573
Ending Page 1580