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The natural history of the R120C PROP1 mutation reveals a wide phenotypic variability in two untreated adult brothers with combined pituitary hormone deficiency. | LitMetric

The natural history of the R120C PROP1 mutation reveals a wide phenotypic variability in two untreated adult brothers with combined pituitary hormone deficiency.

Endocrine

Division of Endocrinology, Department of Medicine, Universidade Federal de São Paulo-UNIFESP, São Paulo, Brazil.

Published: December 2006

AI Article Synopsis

Article Abstract

Background: Combined pituitary hormone deficiency (CPHD) corresponds to impaired production of growth hormone (GH) and other anterior pituitary hormones. The genetic form of CPHD may result from mutations in pituitary transcription factor genes, and PROP1 is the most commonly mutated gene in these cases. Patients with PROP1 mutations may have variable CPHD phenotypes but, because they are usually treated in childhood, the wide phenotypic variability caused by these mutations may not be thoroughly appreciated.

Methods: Clinical follow-up and molecular analysis of PROP1 in two adult brothers with CPHD, born from consanguineous parents, and not treated until late adulthood.

Results: The homozygous R120C mutation was identified in the brothers. Their clinical follow-up showed a wide phenotypic variability: hypogonadism was severe and prevented pubertal development in both, but their final heights were remarkably different, pointing to different degrees in severity of GH/TSH deficiencies; cortisol deficiency developed late in both, but at least 10 yr apart.

Conclusions: The lack of treatment in childhood and adolescence allowed the appreciation of the entire natural history of the CPHD caused by the R120C mutation, and it revealed a remarkable phenotypic variability even in siblings with a very similar genetic background.

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Source
http://dx.doi.org/10.1007/s12020-006-0015-2DOI Listing

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