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Role of NMDA receptors on experimental renal failure. Relationship with NO

Obiettivo

N-methyl-D-aspartate receptor (NMDA-R) is an amino acid receptor and membrane calcium channel. NMDA-R is activated by binding of co-agonists, L-glutamine and L-glycine. In the brain, calcium entry via NMDA-R activates type I nitric oxide synthase (NOS I).

The kidney also contains NOS I and vasodilates in response to L-glycine. We recently demonstrated that NMDA-R are expressed in kidney cortex, where they exert a tonic vasodilatory influence and may account for the vasodilatory response to glycine infusion. Nitric oxide is a gas that exerts, among others, vasodilatory effects in the kidney.

Me and others have demonstrated a role of nitric oxide in several types of acute renal failure, from aminoglicoside-induced, to ischemic in nature. Also, in a recent pap er, I suggested a role for nitric oxide in renal mass reduction due to uninephrectomy. Glycine infusion has been proven to be beneficial in several renal conditions, but the mechanism by which this happens is yet to be elucidated. From cyclosporine nephrotoxicity to ischemic renal failure, increases in glycine availability lead to improvements in renal function.

Furthermore, use of NMDA antagonists has been proven to reduce ischemic damage in the brain and aminoglicoxide ototoxicity. Thus, the relationship between NMDA-R and NO in the kidney in normal and pathological conditions is an exciting field that could lead to new therapies in the treatment of renal diseases.

Campo scientifico (EuroSciVoc)

Parole chiave

Argomento(i)

Invito a presentare proposte

FP6-2002-MOBILITY-12
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Meccanismo di finanziamento

IRG - Marie Curie actions-International re-integration grants

Coordinatore

FUNDACION DR. PIFARRE. HOSPITAL UNIVERSITARIO ARNAU DE VILLANOVA
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