Induction of anti-DNA IgG and IgE antibodies in BALB/c mice.

Important note: Information in this article was accurate in 1993. The state of the art may have changed since the publication date.

Induction of anti-DNA IgG and IgE antibodies in BALB/c mice.

J Autoimmun. 1992 Oct;5(5):653-63. Unique Identifier : AIDSLINE MED/93039270
Namboodiri MS; Nagpal S; Rao PV; Department of Biochemistry, Indian Institute of Science,; Bangalore.

Abstract: Immunization of BALB/c mice with denatured DNA (dnDNA)-methylated bovine serum albumin (MBSA) complex along with aluminium hydroxide gel as adjuvant, resulted in the induction of anti-DNA antibodies of both IgG and IgE isotypes demonstrable by avidin-biotin micro enzyme-linked immunosorbent assay (ELISA) and solid phase radioimmunoassay (SPRIA), respectively. In contrast to the high levels of IgG2a and IgG2b anti-DNA antibodies observed in SLE-prone autoimmune mice, more than 90% of the anti-DNA antibodies of IgG isotype were found to be of IgG1 subclass. Specificity of both IgG and IgE antibodies which recognized activated DNA, dnDNA and double-stranded DNA but not RNA was established by competitive ELISA and SPRIA inhibition assays. These antibodies cross-reacted with cibacron blue and chondroitin sulfate but not with various other proteoglycans, nucleosides and nucleotides. Passive cutaneous anaphylaxis reaction in rats showed that these antibodies are capable of inducing in vivo degranulation of mast cells in a dose-dependent manner. These studies lend support to the concept that IgE antibodies directed against DNA may mediate mast cell degranulation and thus contribute to immediate-type hypersensitivity phenomena including hives seen in patients with systemic lupus erythematosus and to the localization of IgE-nucleic acid complexes.

Keywords: Animal Antibodies, Antinuclear/*BIOSYNTHESIS DNA/*IMMUNOLOGY Human IgE/*BIOSYNTHESIS IgG/*BIOSYNTHESIS Lupus Erythematosus, Systemic/IMMUNOLOGY Male Mice Mice, Inbred BALB C Support, Non-U.S. Gov't JOURNAL ARTICLE
930228
M9320840

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