Dynorphin-(1–13)-Like Immunoreactivity in Central Nervous System and Pituitary Gland of Spontaneously Hypertensive Rats

Abstract
We determined by radioimmunoassay concentrations of dynorphin-(1–13)-like immunoreactivity in the central nervous system and pituitary gland of spontaneously hypertensive rats (SHRs) and normotensive Wistar-Kyoto rats (WKYs). Compared to WKYs, SHRs had significantly lower levels of dynorphin-(1–13)-like immunoreactivity in the hypothalamus and pituitary gland. However, such immunoreactivity in the cerebral cortex, caudate nucleus, diencephalon, brainstem and spinal cord of SHRs and WKYs were similar.