Document Detail


Homozygous microdeletion of the POU1F1, CHMP2B, and VGLL3 genes in chromosome 3-A novel syndrome.
MedLine Citation:
PMID:  21815258     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Microdeletion syndromes include numerous syndromic phenotypes associated with intellectual disability and dysmorphic features. We report on a patient with a novel microdeletion of chromosomal region 3p11.2-p12.1 containing POU1F1, chromatin-modifying protein 2B (CHMP2B), and vestigial-like 3 (VGLL3) genes. Our patient was diagnosed as having a neonatal multiple pituitary hormone [growth hormone (GH), thyroid-stimulating hormone (TSH), and prolactin] deficiency. In addition to the typical findings associated with these hormonal deficiencies, she exhibited clinical features resembling those of Laron syndrome (frontal bossing, saddle nose, small chin, blue sclera, and acromicria), with moderate intellectual disability. She also displayed an unusual growth pattern characterized by unresponsiveness to high doses of GH replacement therapy during infancy and early childhood and an accelerated growth rate beginning at the age of 4.5 years. Insulin-like growth factor (IGF)-1 levels were consistently extremely low or undetectable. Extensive medical and genetic analysis ruled out primary and secondary GH insensitivity. The distinct phenotype and the peculiar growth pattern observed in this affected patient, not reported to have been observed in other cases with POU1F1 gene inactivity, suggest that the other two deleted genes play a possible role in the development of this syndrome. This hypothesis may be supported by the fact that both the CHMP2B and VGLL3 genes are expressed in the liver and the growth plate, the two main target organs of the GH/IGF-1 axis. The homozygous deletion of the CHMP2B gene, previously associated with frontotemporal dementia, may contribute to the intellectual disability observed in this patient. © 2011 Wiley-Liss, Inc.
Authors:
Galia Gat-Yablonski; Rachel Frumkin-Ben David; Meytal Bar; Olga Potievsky; Moshe Phillip; Liora Lazar
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-8-3
Journal Detail:
Title:  American journal of medical genetics. Part A     Volume:  -     ISSN:  1552-4833     ISO Abbreviation:  -     Publication Date:  2011 Aug 
Date Detail:
Created Date:  2011-8-4     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101235741     Medline TA:  Am J Med Genet A     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 Wiley-Liss, Inc.
Affiliation:
The Jesse Z and Sara Lea Shafer Institute for Endocrinology and Diabetes, National Center for Childhood Diabetes, Schneider Children's Medical Center of Israel, Petah Tiqwa, Israel; Felsenstein Medical Research Center, Petah Tiqwa, Israel. galiagy@post.tau.ac.il.
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