{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,4]],"date-time":"2026-06-04T20:12:25Z","timestamp":1780603945837,"version":"3.54.1"},"reference-count":38,"publisher":"American Physiological Society","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["American Journal of Physiology-Renal Physiology"],"published-print":{"date-parts":[[2002,8,1]]},"abstract":"<jats:p>The phosphate-regulating gene with homologies to endopeptidases on the X chromosome (PHEX) is a member of the neutral endopeptidase family, which is expressed predominantly on the plasma membranes of mature osteoblasts and osteocytes. Although it is known that the loss of PHEX function results in X-linked hypophosphatemic rickets, characterized by abnormal bone matrix mineralization and renal phosphate wasting, little is known about how PHEX is regulated. We therefore sought to determine whether the murine PHEX gene is regulated by glucocorticoids (GCs), which are known to influence phosphate homeostasis and bone metabolism. Northern blot analysis revealed increased PHEX mRNA expression in GC-treated suckling mice (1.5-fold) and in rat osteogenic sarcoma (UMR-106) cells (2.5-fold). An increase was also seen in PHEX promoter activity in transiently transfected UMR-106 cells with GC treatment. Analysis of nested promoter deletions revealed that an atypical GC response element was located between \u2212337 and \u2212315 bp. Mutational analysis and electrophoretic mobility shift assays further identified \u2212326 to \u2212321 bp as a site involved in GC regulation. Supershift analyses and electrophoretic mobility shift assay competition studies indicated that the core binding factor \u03b11-subunit transcription factor is able to bind to this region and may therefore play a role in the GC response of the murine PHEX gene.<\/jats:p>","DOI":"10.1152\/ajprenal.00357.2001","type":"journal-article","created":{"date-parts":[[2015,3,3]],"date-time":"2015-03-03T20:35:38Z","timestamp":1425414938000},"page":"F356-F363","source":"Crossref","is-referenced-by-count":19,"title":["Glucocorticoid regulation of the murine PHEX gene"],"prefix":"10.1152","volume":"283","author":[{"given":"Eric R.","family":"Hines","sequence":"first","affiliation":[{"name":"Departments of Pediatrics and Physiology and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"James F.","family":"Collins","sequence":"additional","affiliation":[{"name":"Departments of Pediatrics and Physiology and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marci 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