Research compendium

Fibroblast growth factor 23

FGF23 is a fibroblast-growth-factor-family protein studied in endocrine contexts. Mouse research examines phosphate and vitamin D balance. Family membership does not imply functions equivalent to other FGFs.

This is a research reference, not a product offered in the Asciende catalog. Published studies do not establish the identity, purity or availability of a commercial preparation.

Input signal and axis response

Distinguish local mechanism from integrated effect. A whole-axis result needs its time context and cannot be summarized by a receptor name.

Which level of the endocrine axis was manipulated and which was measured?
Does the readout depend on pulses, time or system feedback?
Are molecular forms or the preparation unambiguously described?

Find readings for this question

Mechanism described in the literature

In cellular models, Klotho expression enabled FGF23 recognition and response through a complex with FGFR1(IIIc). The work also examined Klotho in mice. This is a composite receptor system; detecting an FGFR alone does not reproduce the studied functional conditions.

Classification

Endocrine signaling protein

Other names

FGF23
FGF-23

Genetic loss revealed mineral imbalance

Fgf23-deficient mice showed elevated circulating phosphate, increased renal reabsorption and altered active vitamin D. These findings support a physiological role in that preclinical model. They do not describe or calculate response to an external preparation from an absence phenotype.

One model combines connected consequences

Deficient animals also had growth and bone abnormalities. Coexistence with mineral imbalance does not demonstrate that each results from direct FGF23 action in each tissue. Distinguishing immediate causes from secondary consequences requires additional comparisons.

Klotho contributes system specificity

Receptor-complex research combined binding, forced expression and functional responses. Adding Klotho restored FGF23 responsiveness in the study’s kidney cells. This reconstruction explains why an isolated receptor protein is insufficient for assigning sensitivity and why expressed components must be described.

Questions and answers

Is Klotho another name for FGF23?

No. They are different proteins; Klotho participates in the investigated receptor system.

Is an Fgf23-deficient mouse the inverse of adding FGF23?

No. Genetic absence and experimental exposure are different interventions with their own timescales and consequences.