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[Vasopressin: the ontogeny of antidiuretic action at the cellular level]
Abstract:
The data on the development of molecular mechanism of the antidiuretic effect of vasopressin and the molecular structure of the AVP receptor, cytosolic cAMP-dependent protein-kinases and renal response to AVP, are discussed. The experiments were performed in normal rats and mice, nephrogenic diabetes insipidus mutants and rats treated with cortisol in early postnatal period. The development of the kidney sensitivity to AVP seems to be closely connected with the development of the molecular structure of the AVP receptor, age-related increase of the AVP-activated adenylate cyclase, and the maturation of cAMP-dependent protein kinases.
Insights
The antidiuretic effect of vasopressin (AVP) in developing kidneys is linked to AVP receptor structure and signaling pathways. Kidney sensitivity to AVP matures with receptor development and cAMP-dependent protein kinase activity.
Area of Science:
- Nephrology
- Endocrinology
- Molecular Biology
Background:
- Vasopressin (AVP) plays a crucial role in regulating water balance.
- The molecular mechanisms underlying the antidiuretic effect of AVP are complex.
- Understanding AVP receptor development is key to comprehending kidney maturation.
Purpose of the Study:
- To investigate the molecular mechanisms of the antidiuretic effect of vasopressin (AVP).
- To examine the development of the AVP receptor and its associated signaling pathways in the kidney.
- To correlate kidney sensitivity to AVP with molecular and cellular maturation.
Main Methods:
- Experiments were conducted on normal rats and mice.
- Studies included nephrogenic diabetes insipidus mutant models.
- Analysis involved rats treated with cortisol during early postnatal development.
Main Results:
- Kidney sensitivity to AVP development is closely associated with AVP receptor molecular structure.
- An age-related increase in AVP-activated adenylate cyclase was observed.
- Maturation of cAMP-dependent protein kinases correlates with kidney maturation.
Conclusions:
- The development of kidney sensitivity to AVP is intrinsically linked to the maturation of the AVP receptor.
- AVP signaling pathways, including adenylate cyclase and cAMP-dependent protein kinases, mature alongside the receptor.
- These molecular developments collectively contribute to the establishment of renal response to AVP in developing kidneys.