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Pharmacodynamic responses of plasma and tissue C-type natriuretic peptide to GH: correlation with linear growth in

T C R Prickett1, J C Bothwell, T G Yandle

  • 1Department of Medicine, University of Otago, Christchurch, PO Box 4345, Christchurch 8140, New Zealand. tim.prickett@otago.ac.nz

The Journal of Endocrinology
|November 17, 2011
PubMed

Insights

C-type natriuretic peptide (CNP) levels rapidly increase in plasma and tissues after growth hormone (GH) administration, preceding linear growth. CNP concentrations serve as biomarkers for linear growth and potential therapeutic targets for growth disorders.

Area of Science:

  • Endocrinology
  • Molecular Biology
  • Developmental Biology

Background:

  • C-type natriuretic peptide (CNP) signaling is crucial for postnatal endochondral growth.
  • Previous studies indicate CNP's role, but its dynamic changes during normal growth and in response to growth hormone (GH) are not well-documented.

Purpose of the Study:

  • To investigate the pharmacodynamic response of CNP and its precursor, NTproCNP, in plasma and tissues.
  • To correlate these changes with linear growth metrics in rodent pups during GH treatment.

Main Methods:

  • Rodent pups with GH deficiency were treated with GH or saline for one week.
  • Plasma and tissue concentrations of CNP and NTproCNP were measured.
  • Linear growth parameters (nose-tail length, tibial length, growth plate width) were assessed.

Main Results:

  • GH treatment significantly increased plasma and tissue CNP forms within 24 hours, preceding measurable growth changes.
  • GH increased CNP in various tissues, with the greatest enrichment in growth plates and kidneys.
  • Plasma NTproCNP strongly correlated with linear growth and tissue concentrations at one week, suggesting renal involvement in peptide clearance.

Conclusions:

  • CNP levels promptly increase in growth-regulating tissues following GH administration, supporting its role in endochondral ossification.
  • CNP concentrations can serve as effective biomarkers for monitoring linear growth.
  • These findings provide a rationale for developing CNP agonists as a therapeutic strategy for growth disorders unresponsive to conventional treatments.

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