Ukrainskij biokhimicheskij zhurnal/Ukrayins'kij biokhimichnij zhurnal/Ukrainian biochemical journal 1990-01-01

[Aminobenzoic acid derivatives as specific inhibitors of cyclic nucleotide phosphodiesterase in the rat uterus].

M N Garnovskaia, A V Tret'iakov, M N Maslova, R N Etingof

Index: Ukr. Biokhim. Zh. 62(1) , 97-101, (1990)

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Abstract

It is shown, that p-aminobenzoic acid and its derivatives (p-acetylaminobenzoic acid and p-aminobenzoic acid hydrazide) in the concentration of 10(-6) M are the potent inhibitors (40% below the control specimens) of the phosphodiesterase activity of cyclic nucleotides in the soluble fraction of the adult rat uterus. These drugs exerted no action on the adenylate cyclase activity in membrane fractions. The inhibition is only specific to the uterus enzyme and is not revealed for other tissues. The inhibition is found to be of incompetitive character Ki for p-aminobenzoic acid hidrazide being equal to 3.2 microM.

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