Souza LT, Kowalski TW, Collares MVM, Félix TM. MSX1 gene and nonsyndromic oral clefts in a Southern Brazilian population.
Braz J Med Biol Res 2013;
46:555-8. [PMID:
23903689 PMCID:
PMC3859340 DOI:
10.1590/1414-431x20133054]
[Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Accepted: 05/02/2013] [Indexed: 11/22/2022] Open
Abstract
Nonsyndromic oral clefts (NSOC) are the most common craniofacial birth defects in
humans. The etiology of NSOC is complex, involving both genetic and
environmental factors. Several genes that play a role in cellular proliferation,
differentiation, and apoptosis have been associated with clefting. For example,
variations in the homeobox gene family member MSX1, including a
CA repeat located within its single intron, may play a role in clefting. The aim
of this study was to investigate the association between MSX1
CA repeat polymorphism and NSOC in a Southern Brazilian population using a
case-parent triad design. We studied 182 nuclear families with NSOC recruited
from the Hospital de Clínicas de Porto Alegre in Southern Brazil. The
polymorphic region was amplified by the polymerase chain reaction and analyzed
by using an automated sequencer. Among the 182 families studied, four different
alleles were observed, at frequencies of 0.057 (175 bp), 0.169 (173 bp), 0.096
(171 bp) and 0.67 (169 bp). A transmission disequilibrium test with a
family-based association test (FBAT) software program was used for analysis.
FBAT analysis showed overtransmission of the 169 bp allele in NSOC (P=0.0005).
These results suggest that the CA repeat polymorphism of the
MSX1 gene may play a role in risk of NSOC in populations
from Southern Brazil.
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