Document Detail

Expression of prohibitins on the surface of activated T cells.
MedLine Citation:
PMID:  22417827     Owner:  NLM     Status:  Publisher    
Prohibitins (prohibitin-1 and -2) comprise a family of highly conserved proteins that are mainly localized to mitochondria. Recent studies showed that prohibitins are up-regulated upon T cell activation and play an essential role in maintaining mitochondrial homeostasis. In the present study, we found that a considerable proportion of prohibitin-1 and -2 induced in response to T cell activation was expressed on the surface of activated T cells. When mouse and human T cells were stimulated with PMA and ionomycin, prohibitins expressed on the cell surface were increased significantly, peaking at 48h after stimulation. Stimulation of mouse T cells with anti-CD3 and anti-CD28 antibodies also remarkably induced the cell surface expression of prohibitins. Their expression on the cell surface was also detected in T cell leukemia cells such as Jurkat cells. In Jurkat cells, prohibitin-1 and -2 were co-localized with CD3 on the cell surface, and anti-CD3 antibody-induced signaling, the MAP kinase cascade, was inhibited on treatment with protein A magnetic beads co-conjugated with anti-CD3 antibody and anti-prohibitin-1 or anti-prohibitin-2 antibody. These results suggest that prohibitins expressed on the surface of activated T cells are involved in the T cell receptor-mediated signaling cascade.
Hajime Yurugi; Shuhei Tanida; Akiko Ishida; Kaoru Akita; Munetoyo Toda; Mizue Inoue; Hiroshi Nakada
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-3-6
Journal Detail:
Title:  Biochemical and biophysical research communications     Volume:  -     ISSN:  1090-2104     ISO Abbreviation:  -     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-3-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372516     Medline TA:  Biochem Biophys Res Commun     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012. Published by Elsevier Inc.
Department of Molecular Bioscience, Faculty of Life Science, Kyoto Sangyo University, Kamigamo-Motoyama, Kitaku, Kyoto 603-8555, Japan.
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