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Mediators of Inflammation
Volume 2013, Article ID 384807, 9 pages
Research Article

Heat Shock Proteins 60 and 70 Specific Proinflammatory and Cytotoxic Response of CD4+CD28null Cells in Chronic Kidney Disease

1Department of Nephrology, Postgraduate Institute of Medical Education and Research, Sector 12, Chandigarh 160 012, India
2George Institute of Global Health, Splendor Forum, Jasola, New Delhi 110 025, India

Received 8 July 2013; Revised 3 October 2013; Accepted 11 October 2013

Academic Editor: Anshu Agrawal

Copyright © 2013 Ashok K. Yadav et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Background. CD4+CD28null T cells are expanded in peripheral blood of patients with chronic kidney disease and associated with subclinical atherosclerosis. However, triggers for the oligoclonal expansion and activation of these cells are not clear. Methods. We investigated twenty-five stage V-IV chronic kidney disease (CKD) patients and eight healthy subjects (HC). Peripheral mononuclear cells were isolated and incubated with heat shock protein- (HSP) 60 and 70. CD4+CD28null and CD4+CD28+ cells were sorted by flowcytometry and antigen specific response was assessed by the mRNA and protein expression of interferon (IFN)- , perforin, and granzyme B using qRT-PCR and Elispot. Results. The basal mRNA expression of IFN- , perforin, and granzyme B in CD4+CD28null cells was higher in subjects with CKD compared to that in HC ( ). Subjects with CKD also showed expression of IFN- , perforin, and granzyme B in the CD4+CD28+ subset, but this was much weaker than that seen in the CD4+CD28null population ( ). We did not note the expression of these molecules at mRNA or protein level in either subset of CD4 cells in HC. After incubation with HSP60 and HSP70, CD4+CD28null cells showed increased expression at mRNA ( ) and protein level ( ). CD4+CD28+ cells also showed a weak increase in expression. No antigen-specific response was noted in HC. Conclusion. These data show that CD4+CD28null cells in subjects with CKD react with HSP60 and HSP70 by upregulating the expression of IFN- , perforin and granzyme B. Increased circulating level of HSP60 and HSP70 might play a role in initiation and/or progression of atherosclerosis in CKD subjects through perturbation of CD4+CD28null cells.