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Details for phenotype: tumor-induced osteomalacia

EndoNet ID: ENP00118

Name

tumor-induced osteomalacia

General information

This phenotype is not pathologic

Links to other resources

GO
Medline Plus 000376
Disease database 9351

Phenotype triggers

  • VDR
    in bone
    • Ectopic overproduction of FGF23 overwhelms its processing and degradation, leading to TIO. [1]
    • Administration of recombinant FGF23 in normal and parathyroidectomized animals induced a decrease in serum phosphate levels, phosphaturia accompanied by a reduction in renal mRNA and protein levels for sodium-phosphate cotransport activites in the kidney, a decrease in renal mRNA for 25-hydroxyvitamin D-1{alpha}-hydroxylase, and an increase in 25-hydroxyvitamin D-24-hydroxylase, the cytochrome P-450 enzymes that generate and inactivate 1,25(OH)2D3 hormone, respectively [1]
    • Mice implanted with FGF23-expressing Chinese hamster ovary (CHO) cells showed more severe hypophosphatemia, osteomalacia, and decreased 1,25(OH)2D3 levels. [1]
Reference