Linked Life Data

2446556

Source:http://linkedlifedata.com/resource/pubmed/id/2446556

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
1988-1-4
pubmed:abstractText
Experimental autoimmune myasthenia gravis (EAMG) and antibodies that modulate AChRs from cultured human muscle are induced by a disulfide-looped peptide comprising the human acetylcholine receptor (AChR) alpha-subunit residues 125-147 (H alpha 125-147). To delineate the essential antigenic requirements for induction of EAMG by this peptide, a series of peptides was synthesized: (a) a nonlooped analog (Cys 128 replaced by Ser) stimulated modulating autoantibodies, induced EAMG, and bound antibodies induced by native AChR; (b) H alpha 131-147, a heptadecylpeptide shorter by 6 N-terminal residues, induced modulating antibodies, EAMG, and T cells that responded to H alpha 125-147, but not to H alpha 137-147; (c) H alpha 137-147, an undecapeptide shorter than H alpha 125-147 by 12 N-terminal residues, did not stimulate T cells or induce antibody production, but it bound antibodies generated by the longer peptides. Thus, when coupled to an epitope that could stimulate helper T cells, the region 137-147 was able to stimulate B cells. This study has defined a myasthenogenic region of the human AChR's alpha-subunit, 17 amino acids long, that contains several distinct epitopes, including at least one N-terminal site inducing T-cell responses (region 131-136) and two possibly overlapping sites that induce antibodies (regions 131-136 and 137-147). Further definition of antigenic sites inducing helper and suppressor T-cell responses and stimulating production of autoantibodies to AChR is essential to the goal of antigen-specific immunotherapy for myasthenia gravis.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0077-8923
pubmed:author
pubmed:issnType
Print
pubmed:volume
505
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
439-50
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
Definition of myasthenogenic sites of the human acetylcholine receptor using synthetic peptides.
pubmed:affiliation
Department of Immunology, Mayo Clinic, Rochester, Minnesota 55905.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't