Brain Lesions in the Paraventricular Nuclei and Catecholaminergic Neurons Minimize Salt Hypertension in Dahl Salt-Sensitive Rats

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Abstract
1. The rise in blood pressure in Dahl salt-sensitive rats that received intracerebroventricular 6-hydroxydopamine was almost half that of the control rats throughout 20 weeks of high (8%) NaCl feeding. 2. The rise in bood pressure in Dahl salt-sensitive rats with bilateral complete electrolytic lesions of the paraventricular nuclei was almost half that of the control rats during 12 weeks of high (8%) NaCl feeding. 3. The bilateral complete electrolytic lesions of the suprachiasmatic nuclei enhanced the development of NaCl hypertension in Dahl salt-sensitive rats. 4. These results show that NaCl-induced hypertension in Dahl salt-sensitive rats requires the integrity of the central nervous system catecholaminergic neurones and the paraventricular nuclei for its full expression.

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