[Comparative analysis of vasomotor responses and sympathetic innervation of feed arteries from locomotor and respiratory muscles in a rat].
The characteristics of feeding arteries of diaphragm and medial gastrocnemius (with a diameter of 200-250 micron) were studied. The registration of the mechanical activity of ring preparations under isometric conditions revealed that diaphragm arteries, like arteries of other muscles with a high content of slow muscle fibers, are highly sensitive to adrenoceptor agonists and acetylcholine. The differences in endothelium-dependent relaxation between diaphragm and gastrocnemius arteries are preserved in the presence of L-NAME and diclofenac. Responses to serotonin in diaphragm and gastrocnemius arteries are similar. At the same time, the high density of innervation is characteristic of diaphragm artery only, while in other slow muscles it is low. The density of adrenergic fibers plexus in the diaphragm artery is much higher than in the gastrocnemius artery. The results suggest that the properties of small arteries of diaphragm are determined not only by the oxidative capacity of diaphragm muscle fibers but also by the belonging of the diaphragm to respiratory musculature.
Tarasova
O S
OS
Kalenchuk
V U
VU
Borzykh
A A
AA
Andreev-Andrievskiĭ
A A
AA
Buravkov
S V
SV
Sharova
A P
AP
Vinogradova
O L
OL
D000109:Acetylcholine / Q000494:pharmacology; D000320:Adrenergic Fibers / Q000648:ultrastructure; D000316:Adrenergic alpha-Agonists / Q000494:pharmacology; D000818:Animals; D001158:Arteries / Q000294:innervation / Q000502:physiology*; D003964:Diaphragm / Q000098:blood supply*; D004730:Endothelium, Vascular / Q000502:physiology; D006614:Hindlimb; D066298:In Vitro Techniques; D009126:Muscle Relaxation; D018482:Muscle, Skeletal / Q000098:blood supply*; D009131:Muscle, Smooth, Vascular / Q000294:innervation / Q000502:physiology*; D009569:Nitric Oxide / Q000494:pharmacology; D020030:Nitric Oxide Donors / Q000494:pharmacology; D009599:Nitroprusside / Q000494:pharmacology; D009638:Norepinephrine / Q000494:pharmacology; D010656:Phenylephrine / Q000494:pharmacology; D051381:Rats; D017208:Rats, Wistar; D012701:Serotonin / Q000494:pharmacology; D013564:Sympathetic Nervous System / Q000502:physiology* / Q000648:ultrastructure
D000316:Adrenergic alpha-Agonists; D020030:Nitric Oxide Donors; D009599:Nitroprusside; D010656:Phenylephrine; D009569:Nitric Oxide; D012701:Serotonin; D000109:Acetylcholine; D009638:Norepinephrine