THE AUTONOMIC INNERVATION OF RAT BRACHIAL ARTERY AND VEIN

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The distribution pattern of quinacrine-positive, catecholamine-containing and acetylcholinesterase-positive nerve fibers was investigated in the rat brachial artery and vein using the quinacrine histofluorescence, the formal-dehyde-induced fluorescence and the acetylcholinesterase histochemical methods, respectively. Some animals were chemically sympathectomized using the neurotoxin 6-hydroxydopamine in order to ascertain the nature of the different kinds of nerve fibers visualized. The density of innervation between artery and vein as well as between the various portions of single blood vessels was studied using quantitative image analysis. No quinacrine-positive nerve fibers were found within rat brachial artery and vein. On the contrary both blood vessels were supplied by adrenergic and acetylcholinesterase-containing (likely cholinergic) nerve fibers. The pretreatment of samples with quinacrine did not alter the intensity of the reaction neither the distribution pattern of nerve fibers, revealed with other histochemical techniques. The quantitative image analysis showed that the brachial artery is provided with an adrenergic innervation, richer of about 30% than corresponding vein. In the artery the adrenergic innervation was more developed of the cholinergic one of about 20% and in the vein of about 15%. The artery is provided with a cholinergic innervation richer than corresponding vein of about 25%. The density of nerve fibers decreases gradually proceeding towards the distal ends of studied blood vessels.
日本組織細胞化学会の論文

THE AUTONOMIC INNERVATION OF RAT BRACHIAL ARTERY AND VEIN

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