| Abstract: | Recent in vivo and in vitro studies regarding the involvement of GABAergic systems in cardiovascular function have been reviewed and analyzed. It seems evident, from studies conducted with various GABA agonists and GABA antagonists, that activation of central GABAergic systems reduces sympathetic outflow from the hindbrain area of mammals, thereby producing bradycardia and hypotension. As GABA agonists can relax cerebral arteries, blood-borne GABA might also play a role in cerebrovascular regulation. Further research concerning the mechanisms involved in GABA agonist-induced cardiovascular responses could lead to the development of agents that might be effective in treating certain cardiovascular disorders of man, such as hypertension, cerebral atherosclerosis, migraine, and stroke. |
