Linked Life Data

7689617

Source:http://linkedlifedata.com/resource/pubmed/id/7689617

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1993-9-28
pubmed:abstractText
There is evidence suggesting that Sydenham's chorea, which is a major manifestation of acute rheumatic fever, may be mediated by streptococcal antibodies that cross-react with the brain. Our studies were undertaken to determine whether streptococcal M protein, the major virulence factor of group A streptococci, evoked antibodies that cross-react with human brain. Rabbits were immunized with pepsin-extracted M protein from rheumatogenic type 6 streptococci. Immune sera were screened for the presence of antibodies that cross-reacted with human brain by indirect immunofluorescence tests and immunoblot analyses. Type 6 M protein evoked antibodies that cross-reacted with several brain proteins and antibody binding to these proteins was completely inhibited by type 6 M protein and partially inhibited by types 5 and 19 M proteins, suggesting that these heterologous M proteins contain conserved brain-cross-reactive epitopes. Using synthetic peptides from several serotypes of M proteins, the conserved brain-cross-reactive epitopes were localized to a decapeptide contained within the covalent structure of the B repeat region of type 6 M protein. These peptides also inhibited brain-cross-reactive antibodies in the serum of a patient with active Sydenham's chorea. Our data indicate that streptococcal M proteins contain brain-cross-reactive epitopes that could potentially be involved in the pathogenesis of Sydenham's chorea.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0022-1767
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
151
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2820-8
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
Epitopes of streptococcal M proteins that evoke antibodies that cross-react with human brain.
pubmed:affiliation
Department of Veterans Affairs Medical Center, Memphis, TN.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S.