ABSTRACT
The effects of three non-steroidal anti-inflammatory drugs (NSAID), carprofen, benoxaprofen and indomethacin, on 4-hour and 24-hour carrageenan pleurisy, has been investigated. All three compounds inhibited both the oedematous and cellular components of the 4-hour pleurisy. In the 24-hour pleurisy only indomethacin affected cell accumulation and the inhibitory effect observed was selective for mononuclear cells. The volume of exudate recovered from the pleural cavity at 24 hours, in animals which had received any of the three drugs, was greater than in animals receiving vehicle. The results of a time-course experiment with indomethacin suggest that the observed effects of the NSAID may be a consequence of their inhibition of both the development and decay phases of the pleural inflammation, particularly with regard to the exudative component of the response.
Subject(s)
Anti-Inflammatory Agents/pharmacology , Pleurisy/chemically induced , Animals , Carbazoles/pharmacology , Carrageenan , Exudates and Transudates/drug effects , Female , Indomethacin/pharmacology , Kinetics , Propionates/pharmacology , Rats , Rats, Inbred StrainsABSTRACT
1 The effect of the angiotensin converting enzyme inhibitor, MK 421 (N-((S)-1-(ethoxycarbonyl)-3-phenylpropyl)L-Ala-L-Pro), on the blood pressure of two-kidney Goldblatt hypertensive rats has been investigated in relation to he initial plasma renin activity (PRA) and the initial blood pressure of the individual animals. 2 Blood pressure was monitored by an indirect tail-cuff method at 1, 3, 6 and 24 h after dosing. MK 421 produced a fall in blood pressure in the majority of animals, but the extent of this reduction varied considerably between individuals. 3 The change in blood pressure showed a significant correlation with both the initial PRA and the initial blood pressures of the animals. However, only a modest correlation was found between the initial PRA and the degree of hypertension. 4 MK 421 (10 mg/kg, orally) produced a mean blood pressure change which was statistically significant (P less than 0.001) at all times tested. 5 It is concluded that the degree of antihypertensive activity of MK 421 is related to the degree of activity of the renin-angiotensin system which, in this model at least, is reflected by the PRA.
