Glutamate receptors in the kidney

Area of Science:

• Neuroscience
• Nephrology
• Pharmacology

Background:

• l-Glutamate (l-Glu) is a key neurotransmitter in the central nervous system.
• l-Glu receptors are also present in peripheral tissues, notably the kidney.
• This review focuses on NMDA and Group 1 mGluRs in renal physiology and pathology.

Purpose of the Study:

• To review the properties of ionotropic and metabotropic l-Glu receptors in the kidney.
• To discuss the roles of NMDA and Group 1 mGluRs in renal function and disease.
• To explore the therapeutic potential of targeting l-Glu receptors for kidney diseases.

Main Methods:

• Literature review of studies on l-Glu receptors in the kidney.
• Examination of receptor expression and function in renal tissues.
• Analysis of the impact of receptor activation and blockade on renal parameters.
• Review of genetic studies, such as knockout mouse models.

Main Results:

• NMDA receptors in the renal cortex and medulla influence blood flow, filtration, reabsorption, and urine concentration.
• Sustained NMDA receptor activation leads to oxidative stress and glomerulosclerosis.
• Group 1 mGluRs in podocytes are crucial for preventing albuminuria and glomerulosclerosis.
• Endogenous agonists like homocysteine derivatives and quinolinic acid activate renal l-Glu receptors.

Conclusions:

• l-Glu receptors play significant roles in kidney function and disease pathogenesis.
• Targeting renal l-Glu receptors, particularly NMDA and Group 1 mGluRs, presents a promising therapeutic avenue.
• Selective orally-active compounds targeting these receptors warrant further investigation for treating kidney diseases.