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αKlotho: FGF23 coreceptor and FGF23-regulating hormone
1Endocrine Unit and Pediatric Nephrology Unit, Massachusetts General Hospital, Boston, Massachusetts 02114, USA. hjueppner@partners.org
The Journal of Clinical Investigation
|November 29, 2012
Summary
Low phosphate levels impair bone health. A study reveals that cleaved αKlotho acts as a novel hormone, stimulating FGF23 production to regulate phosphate balance and bone ossification.
Area of Science:
- Endocrinology
- Bone Biology
- Mineral Metabolism
Background:
- Phosphate is crucial for bone ossification and integrity.
- Fibroblast Growth Factor 23 (FGF23) is a key regulator of phosphate homeostasis.
- The precise regulation of FGF23 remains incompletely understood.
Purpose of the Study:
- To investigate novel regulators of phosphate homeostasis.
- To explore the role of αKlotho in FGF23 regulation.
- To understand the impact of cleaved αKlotho on bone metabolism.
Main Methods:
- The study focused on the function of cleaved αKlotho.
- Investigated the induction of FGF23 production.
- Examined the role of αKlotho as an FGF23 coreceptor.
Main Results:
- Cleaved αKlotho functions as a novel endocrine regulator.
- αKlotho is capable of inducing FGF23 production.
- This occurs specifically in osteocytes, the bone-forming cells.
Conclusions:
- Cleaved αKlotho represents a new hormonal factor in phosphate homeostasis.
- This finding sheds light on the complex regulation of FGF23.
- Identifies a potential new target for managing bone and mineral disorders.
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