Induction of autoimmune valvulitis in lewis rats following immunization with peptides from the conserved region of group A streptococcal M protein

Lymbury, Robyn S., Olive, Colleen, Powell, Kellie A., Good, Michael F., Hirst, Robert G., La Brooy, Justin T., and Ketheesan, Natkunam (2003) Induction of autoimmune valvulitis in lewis rats following immunization with peptides from the conserved region of group A streptococcal M protein. Journal of Autoimmunity, 20 (3). pp. 211-217.

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Abstract

Rheumatic heart disease (RHD) is considered to be an autoimmune disorder mediated by group A streptococcal (GAS) M protein-specific T cells and antibodies that cross-react with cardiac antigens and epitopes of the GAS M protein. In this study, Lewis rats were immunized with a pool of overlapping peptides spanning the conserved region of the GAS M protein in Complete Freund's Adjuvant, followed by immunization with Bordetella pertussis. Controls received adjuvants alone. Spleen-derived lymphocytes from rats immunized with the conserved region peptides proliferated in response to the immunogen and to cardiac myosin. Moreover, histological examination of cardiac tissue from rats immunized with conserved region peptides revealed the presence of inflammatory lesions in both the myocardium and valve tissue indicating a role for GAS M protein-specific autoreactive T cells in the development of cardiac lesions. This study may support the use of the rat model of autoimmune valvulitis to investigate the immunopathogenesis of RHD and possible preventive strategies.

Item ID: 737
Item Type: Article (Research - C1)
ISSN: 1095-9157
Keywords: Rheumatic heart disease, streptococcal M protein, Animal model Group A Streptococci
Additional Information:

© 2003 Elsevier. : This journal is available online - use hypertext links above.

Date Deposited: 13 Oct 2006
FoR Codes: 11 MEDICAL AND HEALTH SCIENCES > 1107 Immunology > 110704 Cellular Immunology @ 100%
SEO Codes: 92 HEALTH > 9299 Other Health > 929999 Health not elsewhere classified @ 100%
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