title: Intronic SNPs of TP53 gene in chronic myeloid leukemia: Impact on drug response.
abstract: BACKGROUND
  TP53, located on chromosome 17p13, is one of the most mutated genes affecting many types of human cancers. Thus, we aimed at investigating the association of SNPs in TP53 gene with chronic myeloid leukemia (CML).
  
  
  METHODS
  A total of 236 CML and 157 control samples were analysed for mutations in TP53 gene using polymerase chain reaction followed by direct sequencing.
  
  
  RESULTS
  Sequencing analysis for mutations in exons 7-9 of the TP53 gene revealed four SNPs, three in intron 7 (C14181T, T14201G, and C14310T) and one SNP in intron 6 (A13463G) of TP53 gene. The mutation C14181T is located at position 72 base pairs downstream of the 3'-end of exon 7 of the P53 gene. This mutation is in complete linkage disequilibrium with a T14201G mutation, 20 base pairs further downstream occurring at position 14201. This mutation occurred only in the presence of C14181T mutation and these mutations showed association with advanced phase and cytogenetic poor response. Another two novel mutations, C14310T in intron 7 and A13463G in intron 6 were also found to be associated with cytogenetic poor response.
  
  
  CONCLUSIONS
  Our study suggests that TP53 intronic SNPs might have a strong influence on disease progression and poor response in CML patients.
authors.affiliation: Department of Genetics, Osmania University, Mysore, India .
authors.forename: K
authors.initials: K
authors.lastname: Sailaja
authors.forename: V R
authors.initials: VR
authors.lastname: Rao
authors.forename: Satish
authors.initials: S
authors.lastname: Yadav
authors.forename: R Rajasekhar
authors.initials: RR
authors.lastname: Reddy
authors.forename: D
authors.initials: D
authors.lastname: Surekha
authors.forename: D Nageswara
authors.initials: DN
authors.lastname: Rao
authors.forename: D
authors.initials: D
authors.lastname: Raghunadharao
authors.forename: S
authors.initials: S
authors.lastname: Vishnupriya