Abstract:The relationship of age-dependent changes in concentrations of various opioid peptides in the brain and pituitary to the development of hypertension was studied in the spontaneously hypertensive rat (SHR). Normotensive Wistar-Kyoto (WKY) and Sprague-Dawley rats served as controls. Opioids determined were dynorphin A (1-8) [DN-A(1–8)], β-endorphin (BE) and Met-enkephalin (ME). Three approaches were used: (1) temporal correlations of opioid concentrations with the onset of hypertension in 4-, 8-, 12- and 16-week… Show more
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