Figure 2.

Assay, by chemiluminescence, of H₂O₂ generation (shown as cpm) in isolated basilar arteries (endothelium denuded) in response to 5-HT (1 µM) in the absence or presence of different agents (clorgyline, pargyline, citalopram, PEG-catalase and PEG-SOD). Results are expressed as mean ± SEM. *P < 0.05; **P < 0.01. 5-HT, 5-hydroxytryptamine; cpm, counts per minute; PEG-catalase, polyethylene glycol-catalase; PEG-SOD, polyethylene glycol-superoxide dismutase; SHR, spontaneously hypertensive rats; WKY, Wistar-Kyoto rats.