Role of nitric oxide in the reaction of arterial vessels to laser irradiation.
Reactivity of arterial vessels in the small intestine mesentery to irradiation with a helium-neon laser before and after NO synthase blockade was studied by means of biomicroscopy. Blood flow velocity and vascular diameter increased under conditions of laser irradiation. During irradiation, arterial vasodilation was inversely related to the initial diameter. After treatment with NO synthase inhibitor, the dilatory response of vessels to laser irradiation was completely abolished (arteries, diameter >80 micro) or decreased by 2 times (arterioles, diameter <50 micro).
Chertok
V M
VM
Department of Human Anatomy, Vladivostok State Medical University, Russia. chertokv@mail.ru
Kotsyuba
A E
AE
Bespalova
E V
EV
D000818:Animals; D001158:Arteries / Q000187:drug effects / Q000502:physiology* / Q000528:radiation effects; D007421:Intestine, Small / Q000098:blood supply; D007834:Lasers; D008833:Microcirculation / Q000187:drug effects / Q000528:radiation effects; D009569:Nitric Oxide / Q000378:metabolism / Q000502:physiology*; D019001:Nitric Oxide Synthase / Q000037:antagonists & inhibitors*; D051381:Rats; D014664:Vasodilation / Q000528:radiation effects
D009569:Nitric Oxide; D019001:Nitric Oxide Synthase