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Cited by 414

The DOI matches its Crossref record; 21 of the 21 references it cites were found in a registry or an index.

Human Fibroblast Growth Factor-23 Mutants Suppress Na+-dependent Phosphate Co-transport Activity and 1α,25-Dihydroxyvitamin D3 Production

Open access
Saito, Hitoshi, Kusano, Kenichiro, Kinosaki, Masahiko, Ito, Hirotaka, Hirata, Michinori, Segawa, Hiroko, Miyamoto, Ken-ichi, Fukushima, Naoshi·2003·Journal of Biological Chemistry

Abstract

The human fibroblast growth factor 23 (hFGF23) and its autosomal dominant hypophosphatemic rickets (ADHR) mutant genes were incorporated into animals by naked DNA injection to investigate the action on phosphate homeostasis in vivo. The hFGF23 mutants (R176Q, R179Q, and R179W) markedly reduced serum phosphorus (6.2-6.9 mg/dl) compared with the plasmid MOCK (8.5 mg/dl). However, native hFGF23 did not affect serum phosphorus (8.6 mg/dl). Both hFGF23 and hFGF23R179Q mRNAs were expressed more than 100-fold in the liver 4 days after injection, however, the C-terminal portion of hFGF23 was detected only in the serum from hFGF23R179Q-injected animals (1109 pg/ml). hFGF23R179Q mutant was secreted as a 32-kDa protein, whereas, native hFGF23 was detected as a 20-kDa protein in the cell-conditioned media. These results suggest the hFGF23R179Q protein is resistant to intracellular proteolytic processing. The hFGF23R179Q suppressed Na/P(i) co-transport activities both in kidney and in small intestine by 45 and 30%, respectively, as well as serum 1alpha,25-dihydroxyvitamin D(3) to less than 15 pg/ml. However, it had little effect on serum parathyroid hormone (PTH). Infusion of hFGF23R179Q protein normalized serum phosphorus in thyroparathyroidectomized rats without affecting serum calcium. Taken together, the FGF23 mutants reduce both phosphate uptake in intestine and phosphate reabsorption in kidney, independent of PTH action.

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Metadata

Authors
Saito, H., Kusano, K., Kinosaki, M., Ito, H., Hirata, M., Segawa, H., Miyamoto, K.-I., & Fukushima, N.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2003-01
Volume
278
Issue
4
Pages
2206-2211
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1968779137
Cited by
414
References
21
FWCI
14.51
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Human Fibroblast Growth Factor-23 Mutants Suppress Na+-dependent Phosphate Co-transport Activity and 1α,25-Dihydroxyvitamin D3 Production. https://app.cochat.ai/papers/10.1074/jbc.m207872200
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Saito, H., Kusano, K., Kinosaki, M., Ito, H., Hirata, M., Segawa, H., Miyamoto, K.-I., & Fukushima, N. (2003). Human Fibroblast Growth Factor-23 Mutants Suppress Na+-dependent Phosphate Co-transport Activity and 1α,25-Dihydroxyvitamin D3 Production. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.m207872200

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