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Endogenous N/OFQ peptide levels in brain cortex, whole hypothalamus, whole medulla, paraventricular nucleus (PVN), and ventrolateral medulla (VLM) tissue isolated from male Sprague-Dawley rats maintained 3-wk on either a control diet (0.4% NaCl) or an 8% NaCl diet (n = 6/group). Results are means ± SE. *P < 0.05, statistically different from normal respective chow value.
