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Angiology
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Perivascular Innervation of the Cerebral Arteries in Spontaneously Hypertensive Rats—An Immunohistochemical Study

Koji Kawamura

Second Department of Pathology, School of Medicine, Fukuoka University, Fukuoka, Japan

Shigeo Takebayashi

Second Department of Pathology, School of Medicine, Fukuoka University, Fukuoka, Japan

Perivascular innervation in cerebral arteries of spontaneously hypertensive rats and of normotensive Wistar-Kyoto rats was studied. Adrenergic nerve fibers and neuropeptide Y-containing nerve fibers, indicative of vasoconstrictor nerves, were denser in all cerebral arteries of spontaneously hypertensive rats than those of Wistar-Kyoto rats. In contrast, cholinergic nerve fibers and vasoactive intes tinal polypeptide, substance P-containing nerve fibers, indicative of vasodilator nerves, remained unchanged in all cerebral arteries of spontaneously hyperten sive rats, as compared with findings in the Wistar-Kyoto rats. Thus, not only adrenergic nerve fibers but also neuropeptide Y-containing nerve fibers may play an important role in preventing the disruption of the blood-brain barrier and the development of hypertensive encephalopathy in spontaneously hypertensive rats.

Angiology, Vol. 42, No. 2, 123-132 (1991)
DOI: 10.1177/000331979104200206
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