Angiotensin-like activity in resistance vessels

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Abstract
Angiotensin II (ANG II) was localized immunocytochemically in kidney and various other organs of the chinese hamster. In the kidney ANG II-like activity was found in the epitheloid cells of the juxtaglomerular apparatus as well as in the media i.e. the smooth muscle cells of arcuate and interlobular arteries and afferent arterioles. ANG II-like activity was also observed in the medial muscle cells of resistance vessels in other organs and tissues such as submandibular gland and brown adipose tissue. The site of synthesis of ANG II needs to be investigated but the data point to the possibility of an intracellular function of ANG II in smooth muscle cells of blood vessels.