Document Detail

H9724, a monoclonal antibody to Borrelia burgdorferi's flagellin, binds to heat shock protein 60 (HSP60) within live neuroblastoma cells: a potential role for HSP60 in peptide hormone signaling and in an autoimmune pathogenesis of the neuropathy of Lyme disease.
MedLine Citation:
PMID:  11860186     Owner:  NLM     Status:  MEDLINE    
Although Borrelia burgdorferi, the causative agent of Lyme disease, is found at the site of many disease manifestations, local infection may not explain all its features. B. burgdorferi's flagellin cross-reacts with a component of human peripheral nerve axon, previously identified as heat shock protein 60 (HSP60). The cross-reacting epitopes are bound by a monoclonal antibody to B. burgdorferi's flagellin, H9724. Addition of H9724 to neuroblastoma cell cultures blocks in vitro spontaneous and peptide growth-factor-stimulated neuritogenesis. Withdrawal of H9724 allows return to normal growth and differentiation. Using electron microscopy, immunoprecipitation and immunoblotting, and FACS analysis we sought to identify the site of binding of H9724, with the starting hypotheses that the binding was intracellular and not identical to the binding site of II-13, a monoclonal anti-HSP60 antibody. The current studies show that H9724 binds to an intracellular target in cultured cells with negligible, if any, surface binding. We previously showed that sera from patients with neurological manifestations of Lyme disease bound to human axons in a pattern identical to H9724's binding; these same sera also bind to an intracellular neuroblastoma cell target. II-13 binds to a different HSP60 epitope than H9724: II-13 does not modify cellular function in vitro. As predicted, II-13 bound to mitochondria, in a pattern of cellular binding very different from H9724, which bound in a scattered cytoplasmic, nonorganelle-related pattern. H9724's effect is the first evidence that HSP60 may play a role in peptide-hormone-receptor function and demonstrates the modulatory potential of a monoclonal antibody on living cells.
L H Sigal; S Williams; B Soltys; R Gupta
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Cellular and molecular neurobiology     Volume:  21     ISSN:  0272-4340     ISO Abbreviation:  Cell. Mol. Neurobiol.     Publication Date:  2001 Oct 
Date Detail:
Created Date:  2002-02-25     Completed Date:  2002-08-20     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8200709     Medline TA:  Cell Mol Neurobiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  477-95     Citation Subset:  IM    
Department of Medicine, Robert Wood Johnson Medical School. University of Medicine and Dentistry of New Jersey, USA.
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MeSH Terms
Antibodies, Monoclonal / pharmacokinetics*
Borrelia burgdorferi
Chaperonin 60 / metabolism*,  physiology
Flagellin / immunology*
Lyme Disease / immunology*,  physiopathology
Signal Transduction / physiology*
Tumor Cells, Cultured
Reg. No./Substance:
0/Antibodies, Monoclonal; 0/Chaperonin 60; 12777-81-0/Flagellin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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