In an experimental model of bleeding-induced hypovolemic shock causing the death of all saline-treated rats within 26 +/- 4 min, the intravenous injection of bombesin (2.5, 5 or 10 micrograms/kg) dose-dependently restored blood pressure, pulse amplitude, heart rate and respiratory function, and improved survival rate as assessed at the end of the experiment (2 h). The effect on cardiovascular and respiratory functions was prompt (within 1-2 min) and sustained. The release of cholecystokinin seems to be the main mechanism of action, because the anti-shock effect of bombesin is largely prevented by the CCK-antagonist, L-364,718.
Bombesin reverses bleeding-induced hypovolemic shock, in rats / Guarini, Salvatore; S., Tagliavini; Bazzani, Carla; Bertolini, Alfio. - In: LIFE SCIENCES. - ISSN 0024-3205. - STAMPA. - 45:(1989), pp. 107-116.