Sympathetic tone was augmented in malnourished compared with control rats (131 ± 17 vs 41 ± 11 b.p.m., respectively), whereas parasympathetic tone was reduced in malnourished com...
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...prevented the rise in both GFR and RPF. Same study also examine whether the amino acid -induced hyperfiltration was due to dopamine release from renal nerves or enhanced renal tubule dopamine synthesis, they administered amino acid to rats in which the left kidney had been chronically denervated while the right kidney remained intact. It was observed that the infusion of amino acid led to significant increments in GFR and RPF only in the intact control kidney, whereas GFR and RPF remained unaltered in the denervated kidney.
Nitric oxide (NO) is another paracrine factor that act in kidney to modulate neurotransmission activity. It is produced via the action of nitric oxide synthase (NOS) enzymes this exist in three isoforms; neuronal (nNOS, NOSI), inducible (iNOS, NOSII), and endothelial (eNOS, NOSIII) and all are expressed within the kidney (Edward etal, 2011).
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