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FGF23, Biomarker or Target?

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Fibroblast growth factor 23 (FGF23) impacts multiple organs, not just phosphate and vitamin D. Understanding FGF23 pathways is key to preventing detrimental effects, especially in chronic kidney disease patients.

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Area of Science:

  • Endocrinology and Metabolism
  • Nephrology
  • Cardiology

Background:

  • Fibroblast growth factor 23 (FGF23) is a hormone primarily known for regulating phosphate and vitamin D.
  • Emerging evidence indicates FGF23 has broader systemic effects, potentially detrimental when in excess.
  • High FGF23 levels are notably observed in chronic kidney disease (CKD).

Purpose of the Study:

  • To elucidate the diverse signaling pathways and organ-specific effects of FGF23.
  • To highlight the potential adverse impacts of elevated FGF23 levels.
  • To underscore the importance of identifying FGF23 receptors for therapeutic targeting.

Main Methods:

  • Review of current literature on FGF23 signaling and its effects.
  • Analysis of FGF23's impact on cardiac, hepatic, bone, and bone marrow tissues.
  • Discussion of FGF23's role in chronic kidney disease and other populations.

Main Results:

  • FGF23 excess is linked to left ventricular hypertrophy (heart), inflammation (liver), impaired mineralization (bone), and reduced erythropoietin (bone marrow).
  • Chronic kidney disease patients exhibit significantly elevated FGF23 levels, suggesting heightened risk of adverse effects.
  • The precise causal relationship between FGF23 and clinical outcomes remains under investigation.

Conclusions:

  • FGF23 exerts pleiotropic effects beyond mineral metabolism, influencing multiple organ systems.
  • Targeting FGF23 signaling pathways, potentially via receptor blockade, represents a promising therapeutic strategy.
  • Further research is warranted to clarify FGF23's causal role in disease and optimize therapeutic interventions.