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FGF-23-Klotho signaling stimulates proliferation and prevents vitamin D-induced apoptosis.


ABSTRACT: Fibroblast growth factor 23 (FGF-23) and Klotho are secretory proteins that regulate mineral-ion metabolism. Fgf-23(-/-) or Klotho(-/-) knockout mice exhibit several pathophysiological processes consistent with premature aging including severe atrophy of tissues. We show that the signal transduction pathways initiated by FGF-23-Klotho prevent tissue atrophy by stimulating proliferation and preventing apoptosis caused by excessive systemic vitamin D. Because serum levels of active vitamin D are greatly increased upon genetic ablation of Fgf-23 or Klotho, we find that these molecules have a dual role in suppression of apoptotic actions of vitamin D through both negative regulation of 1alpha-hydroxylase expression and phosphoinositide-3 kinase-dependent inhibition of caspase activity. These data provide new insights into the physiological roles of FGF-23 and Klotho.

SUBMITTER: Medici D 

PROVIDER: S-EPMC2500132 | biostudies-literature | 2008 Aug

REPOSITORIES: biostudies-literature

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FGF-23-Klotho signaling stimulates proliferation and prevents vitamin D-induced apoptosis.

Medici Damian D   Razzaque Mohammed S MS   Deluca Stephelynn S   Rector Trent L TL   Hou Bo B   Kang Kihwa K   Goetz Regina R   Mohammadi Moosa M   Kuro-O Makoto M   Olsen Bjorn R BR   Lanske Beate B  

The Journal of cell biology 20080804 3


Fibroblast growth factor 23 (FGF-23) and Klotho are secretory proteins that regulate mineral-ion metabolism. Fgf-23(-/-) or Klotho(-/-) knockout mice exhibit several pathophysiological processes consistent with premature aging including severe atrophy of tissues. We show that the signal transduction pathways initiated by FGF-23-Klotho prevent tissue atrophy by stimulating proliferation and preventing apoptosis caused by excessive systemic vitamin D. Because serum levels of active vitamin D are g  ...[more]

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