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A homozygous balanced reciprocal translocation suggests LINC00237 as a candidate gene for MOMO (macrosomia, obesity, macrocephaly, and ocular abnormalities) syndrome.
MedLine Citation:
PMID:  23034868     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Macrosomia, obesity, macrocephaly, and ocular abnormalities syndrome (MOMO syndrome) has been reported in only four patients to date. In these sporadic cases, no chromosomal or molecular abnormality has been identified thus far. Here, we report on the clinical, cytogenetic, and molecular findings in a child of healthy consanguineous parents suffering from MOMO syndrome. Conventional karyotyping revealed an inherited homozygous balanced reciprocal translocation (16;20)(q21;p11.2). Uniparental disomy testing showed bi-parental inheritance for both derivative chromosomes 16 and 20. The patient's oligonucleotide array-comparative genomic hybridization profile revealed no abnormality. From the homozygous balanced reciprocal translocation (16;20)(q21;p11.2), a positional cloning strategy, designed to narrow 16q21 and 20p11.2 breakpoints, revealed the disruption of a novel gene located at 20p11.23. This gene is now named LINC00237, according to the HUGO (Human Genome Organization) nomenclature. The gene apparently leads to the production of a non-coding RNA. We established that LINC00237 was expressed in lymphocytes of control individuals while normal transcripts were absent in lymphocytes of our MOMO patient. LINC00237 was not ubiquitously expressed in control tissues, but it was notably highly expressed in the brain. Our results suggested autosomal recessive inheritance of MOMO syndrome. LINC00237 could play a role in the pathogenesis of this syndrome and could provide new insights into hyperphagia-related obesity and intellectual disability. © 2012 Wiley Periodicals, Inc.
Authors:
Phi Yen Vu; Jérôme Toutain; David Cappellen; Marie-Ange Delrue; Hussein Daoud; Azza Abd El Moneim; Pascal Barat; Orianne Montaubin; Françoise Bonnet; Zong Qi Dai; Christophe Philippe; Cong Toai Tran; Caroline Rooryck; Benoît Arveiler; Robert Saura; Sylvain Briault; Didier Lacombe; Laurence Taine
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-3
Journal Detail:
Title:  American journal of medical genetics. Part A     Volume:  -     ISSN:  1552-4833     ISO Abbreviation:  Am. J. Med. Genet. A     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-4     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 © 2012 Wiley Periodicals, Inc.
Affiliation:
Univ. Bordeaux, Maladies Rares: Génétique et Métabolisme (MRGM), Bordeaux, France; CHU Bordeaux, Génétique médicale, Bordeaux, France; Laboratoire d'Histologie-Embryologie-Génétique, UTC Ho Chi Minh City, Ho Chi Minh, Vietnam.
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