Antiporphyric activity of theophylline in normal and allylisopropylacetamide-treated rats

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Abstract

Theophylline decreases the levels of 5-aminolevulinic (ALA) synthetase in allylisopropylacetamide(AIA)-treated rats. Since theophylline increases cell cAMP levels this result suggests cAMP involvement in ALA synthetase repression. Theophylline in AIA-treated rats also protects the levels of cytochrome P-450 which reflect the values of total heme, the natural repressor of ALA synthetase activity.

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