[Modulation of renal transmitter release by presynaptic receptors].
Renal sympathetic nerve varicosities possess a variety of receptors which when activated by appropriate agonists can modulate noradrenaline release at the local level of the kidney. Thus, activation of prejunctional alpha 1- and alpha 2-adrenoceptors, prostaglandin (PG), dopamine, adenosine and serotonin receptors inhibits, whereas activation of prejunctional beta 2-adrenoceptors and angiotensin (A) II receptors enhances renal noradrenaline release. Moreover, neuronally released noradrenaline itself activates prejunctional inhibitory alpha 1- and alpha 2-adrenoceptors forming a "negative feedback loop" of its own release (autoinhibition). PGE2 and adenosine locally formed in the kidney by renal nerve stimulation inhibits noradrenaline release through activation of their specific prejunctional receptor system (transjunctional inhibition).
Rump
L C
LC
Innere Medizin IV, Medizinische Universitätsklinik Freiburg.
Schollmeyer
P
P
D000241:Adenosine / Q000502:physiology; D000818:Animals; D006801:Humans; D007668:Kidney / Q000294:innervation*; D018377:Neurotransmitter Agents / Q000378:metabolism*; D011453:Prostaglandins / Q000502:physiology; D017981:Receptors, Neurotransmitter / Q000502:physiology*; D013564:Sympathetic Nervous System / Q000502:physiology; D013569:Synapses / Q000502:physiology*
D018377:Neurotransmitter Agents; D011453:Prostaglandins; D017981:Receptors, Neurotransmitter; D000241:Adenosine
Modulation der renalen Transmitter-Freisetzung durch präsynaptische Rezeptoren.