Renin-like immunocytochemical activity in the rat and mouse brain.

Renin-like immunoreactivity could be demonstrated in the nuclei paraventricularis, periventricularis and supraopticus of the hypothalamus and in the cerebellar cortex of rats and mice, with both the peroxidase-antiperoxidase (PAP) and fluorescence techniques. The findings are consistent with the assumption of an endogenous angiotensin-forming system in the brain.