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Fig. 8. Tension recordings from the dorsal aorta showing the vasodilatory effect of
nicotine (A) and its effect in the presence of the cyclo-oxygenase inhibitor,
indomethacin (B). Vessels were preincubated with indomethacin
(105 mol l1) for approximately 10 min
prior to being pre-constricted with endothelin-1 (ET-1; 108
mol l1). At the point of maximal vasoconstriction, nicotine
(3x104 mol l1) was administered. (C)
Mean response (% vasodilation) of nicotine on pre-constricted dorsal aorta and
intestinal vein in the absence of (filled bars) and in the presence of
indomethacin (open bars). Note that there is no significant difference in the
nicotine-mediated dilation (dorsal aorta, P=0.63; intestinal vein,
P=0.20; N=5).