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The relationship between phosphorus retention and fibroblast growth factor 23 in broiler breeders
- Source :
- Poultry Science; 20240101, Issue: Preprints
- Publication Year :
- 2024
-
Abstract
- Previous studies with broiler breeders indicate a P retention threshold when fed daily dietary levels of non-phytate P (NPP) exceeding 320 mg. Fibroblast growth factor 23 (FGF23) is a hormone secreted by osteocytes which modulates P retention and could be the biological agent which controls the P threshold in breeders. To evaluate the relationship between FGF23 and the P retention threshold, a 4-wk study with 32-wk-old breeders was conducted with 6 dietary treatments with daily NPP intake of 216 to 576 mg/d/h with increments of 80 mg/kg diet. The goals were 1) to elucidate how plasma FGF23 corresponds with the P retention threshold in broiler breeders and 2) to determine the amount of P for optimal egg production and bone health. Results showed that between daily 288 mg and 360 mg dietary NPP intake, P retention decreased from 33 to 26% but FGF23 levels increased from 130 pg/mL to 220 pg/mL with increasing NPP. The elevation of plasma FGF23 between the range of 288 mg to 360 mg dietary NPP/d intake suggests that FGF23 is related to the P retention threshold and may be the major hormone for regulating physiological P levels when intake of daily dietary P levels are increased above 288 mg NPP.
Details
- Language :
- English
- ISSN :
- 00325791 and 15253171
- Issue :
- Preprints
- Database :
- Supplemental Index
- Journal :
- Poultry Science
- Publication Type :
- Periodical
- Accession number :
- ejs66436609
- Full Text :
- https://doi.org/10.1016/j.psj.2024.103889