PMID: 6970809Jun 1, 1980Paper

Antinuclear antibodies related to acetylator phenotype in mice

The Journal of Pharmacology and Experimental Therapeutics
R H Tannen, W W Weber

Abstract

A/J mice are proposed as a model of the human lupus diathesis since we previously determined that they express a slow acetyltor phenotype while others showed them to have a predisposition to develop spontaneous and drug-induced antinuclear antibodies. A/J mice were mated with C57BL/6J mice, a rapid acetylator phenotype which is relatively resistant to spontaneous and drug-induced antinuclear antibodies, to assess the importance of slow acetylator status as a component of the lupus diathesis. Procainamide, a potent inducer of antinuclear antibodies, was acetylated to a lesser degree by A/J mice than by C57BL/6J mice. This difference, detectable by in vitro assay but not by urinary levels of acetylated drug, represents a genetic polymorphism which can be detected in F2 and backcross progency of these two strains. We confirmed that A/J mice have a higher incidence of spontaneous antinuclear antibodies than C57BL/6J mice and that in A/J mice these antibodies can be induced by oral procainamide (6 g/l of drinking water for 37 weeks); procainamide tended to suppress antinuclear antibody formation in C57BL/6J mice, however. Rapid and slow acetylators among F2 and backcross populations were identified by a test for N-acetyltransferase ...Continue Reading

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