The anti-inflammatory and antinociceptive activities of a novel
quipazine derivative 2(4-(3-chloropropyl)piperazinyl)
quinoline (AAL-13), a selective inhibitor of
5-hydroxytryptamine (5-HT) reuptake, has been examined. Anti-inflammatory activity was assessed by mesuring the inhibition of a cotton pellet
granuloma and of
carrageenan-induced paw oedema in rats, and of
cantharidin-induced topical
inflammation in the mouse ear. Antinociceptive activity was studied by using the modified Randall-Selitto method.
Indomethacin was used as a reference.
AAL-13 slightly inhibited
granuloma formation (13%, P less than 0.02) at 100 mg kg-1 day-1 for 7 days, whereas half that dose had no significant effect. There was significant inhibition of
carrageenan-induced rat paw oedema (35%, P less than 0.05 and 103%, P less than 0.001) 3 h after single doses of
AAL-13 (50 and 100 mg kg-1 p.o., respectively). Three hours after i.p. injection, the oedema inhibition was 58% (P less than 0.05) and 86% (P less than 0.001) for doses of 25 and 50 mg kg-1, respectively. In comparison,
indomethacin (3, 6 and 12 mg kg-1 p.o.) inhibited oedema by 59% (P less than 0.02), 65% (P less than 0.01) and 63% (P less than 0.02), respectively. Intraperitoneally, only the 12 mg kg-1 dose produced significant inhibition (82%, 3 h after
carrageenan injection, P less than 0.05).
AAL-13 (1.5 mg/ear) had a significant anti-inflammatory effect on the mouse ear (52%, inhibition, P less than 0.05), while
indomethacin (3 mg/ear) gave 43% inhibition (P less than 0.05).(ABSTRACT TRUNCATED AT 250 WORDS)