title: [Association of muscle segment homeobox gene 1 polymorphisms with nonsyndromic cleft lip with or without cleft palate].
abstract: OBJECTIVE
  Muscle segment homeobox gene (MSX)1 has been proposed as a gene in which mutations may contribute to nonsyndromic cleft lip with or without cleft palate (NSCL/P). To study MSX1 polymorphisms in NSCL/ P by means of polymerase chain reaction-single-strand conformation polymorphism (PCR-SSCP), and investigate the association of MSX1 exons 1 polymorphisms with NSCL/P.
  
  
  METHODS
  DNA were extracted from blood samples from NSCL/P and unrelated normal subjects. Genome DNA from peripheral leukocyte with these blood samples were extracted, which was used as template to amplify desired gene fragment of MSX1 exons 1 by means of polymerase chain reaction (PCR). The PCR products were examined by single-strand conformation polymorphism (SSCP). The MSX1 exons 1 polymorphisms were examined by sequencing if mutations were found.
  
  
  RESULTS
  MSX1 genes of exon 1 mutation was not been found in the NSCL/P and unrelated normal subjects by SSCP.
  
  
  CONCLUSIONS
  No correlation between MSX1 exon 1 and NSCL/P was found. MSX1 exon 1 may not be a key gene (susceptibility gene) in NSCL/P.
authors.affiliation: Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Luzhou Medical College, Luzhou 646000, China.
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.forename: Jun-Ling
authors.initials: JL
authors.lastname: Tang
authors.forename: Shang-Zheng
authors.initials: SZ
authors.lastname: Liang
mesh_terms: D002971:Cleft Lip; D002972:Cleft Palate; D005787:Gene Frequency; D005801:Genes, Homeobox; D006801:Humans; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic