Knock-out of the histidine decarboxylase gene modifies the repertoire of natural autoantibodies

Francisco J. Quintana, E. Búzás, Z. Prohászka, Adrienn Bíró, Judit Kocsis, G. Füst, A. Falus, Irun R. Cohen

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Natural antibodies (NA) are antibodies produced in the absence of known immunization with specific antigens. NA are found in the blood of healthy humans and mice. Histamine influences many aspects of the immune response, including antibody production. However, the role of histamine in the generation of NA has not yet been studied. In this work, we used an ELISA assay to characterize the self-antigen binding repertoires of NA in wild type (WT) mice and in histidine decarboxylase knock-out (HDC-KO) mice, unable to synthesize histamine. We now report that HDC-KO and WT mice differed in the patterns of autoreactivity of their IgM and IgG NA. The NA in HDC-KO sera manifested a larger repertoire of IgM autoantibodies than did the WT sera. The self-antigens bound by IgM from HDC-KO mice included structural proteins, enzymes associated with cellular metabolism, double-stranded and single-stranded DNA, and tissue-specific antigens like insulin. There were relatively fewer differences in the NA repertoire of IgG autoantibodies of the mice: notably, the HDC-KO sera reacted with glutamic acid decarboxylase (GAD), an antigen associated with autoimmune diabetes. These results demonstrate that endogenous histamine can influence the self-reactivity of the NA repertoire.

Original languageEnglish
Pages (from-to)297-305
Number of pages9
JournalJournal of Autoimmunity
Volume22
Issue number4
DOIs
Publication statusPublished - Jun 2004

Fingerprint

Histidine Decarboxylase
Autoantibodies
Antibodies
Genes
Histamine
Knockout Mice
Immunoglobulin M
Autoantigens
Antigens
Immunoglobulin G
Serum
Glutamate Decarboxylase
Single-Stranded DNA
Type 1 Diabetes Mellitus
Antibody Formation
Immunization
Enzyme-Linked Immunosorbent Assay
Insulin

Keywords

  • Autoantibodies
  • Autoimmunity
  • Histamine
  • Histidine decarboxylase knock-out

ASJC Scopus subject areas

  • Immunology
  • Immunology and Allergy

Cite this

Knock-out of the histidine decarboxylase gene modifies the repertoire of natural autoantibodies. / Quintana, Francisco J.; Búzás, E.; Prohászka, Z.; Bíró, Adrienn; Kocsis, Judit; Füst, G.; Falus, A.; Cohen, Irun R.

In: Journal of Autoimmunity, Vol. 22, No. 4, 06.2004, p. 297-305.

Research output: Contribution to journalArticle

Quintana, Francisco J. ; Búzás, E. ; Prohászka, Z. ; Bíró, Adrienn ; Kocsis, Judit ; Füst, G. ; Falus, A. ; Cohen, Irun R. / Knock-out of the histidine decarboxylase gene modifies the repertoire of natural autoantibodies. In: Journal of Autoimmunity. 2004 ; Vol. 22, No. 4. pp. 297-305.
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