Abstract
Modifications in prolactin specific binding in the rat liver induced by different non-steroidal anti-inflammatory drugs (indomethacin, piroxicam, ketoprofen, phenylbutazone, mefenamic acid and acetylsalicylic acid) have been studied. All caused a dose-dependent inhibition of prolactin binding capacity whereas no change was found in dissociation constant values. The inhibitory effect is reversible and highly specific, since insulin binding to the same membrane preparation is not affected. The degree of inhibitory activity on prolactin binding is related to the anti-inflammatory activity of each drug, which supports the hypothesis of an involvement of prostaglandin synthesis.
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