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Article Abstract
Context: Short stature homeobox-containing gene (SHOX) variants of unknown clinical significance occur frequently among children with short stature, yet their growth hormone (GH)/insulin-like growth factor-1 (IGF-1) status and response to GH have not been studied.
Objective: To define GH and IGF-1 status in children with SHOX variants and assess their response to GH.
Patients And Methods: This is a retrospective review of children with short stature. Children with SHOX variants were compared to those with no variants. Height standard deviation scores (SDS) and IGF-1 SDS at baseline and during GH treatment at 6, 12, and 24 months were analyzed. Growth velocity (GV), maximum GH dose, IGF-BP3, and changes in height SDS, IGF-1 SDS, and GV were compared.
Results: Among 355 children, 83 (23%) had SHOX variants. Nineteen different SHOX variants were detected. There was no difference in age, height SDS, IGF-1 SDS, or IGF-BP3 between children with SHOX variants and those with normal SHOX. Height SDS, IGF-1 SDS, IGF-BP3, GV, and GH dose were not different between patients with SHOX variants and those without.
Conclusions: The GH and IGF-1 characteristics of children with short stature were not different between children with SHOX+ variants and children with no variants. Although these findings suggest that SHOX variants are polymorphisms, studies prospectively comparing individual SHOX variants are needed.
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| http://dx.doi.org/10.1159/000365507 | DOI Listing |
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