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Novel Mutations of the PARP-1 Gene Associated with Colorectal Cancer in the Saudi Population

  • Alshammari, Atika Hazzaa (Department of Biochemistry, College of Science, King Saud University) ;
  • Shalaby, Manal Aly (Genetic Engineering and Biotechnology Research Institute (GEBRI), City for Scientific Research and Technology Applications) ;
  • Alanazi, Mohammad Saud (Department of Biochemistry, College of Science, King Saud University) ;
  • Saeed, Hesham Mahmoud (Department of Bioscience and Technology, Instituate of Graduate Studies and Research)
  • Published : 2014.04.30

Abstract

Background: colorectal cancer (CRC) is the third most common type of cancers and the fourth leading cause of death worldwide. In Saudi Arabia, CRC accounts for 8.5% of all tumors; it ranks first among all cancers in males and third among females. The aim of this study was to link between different PARP-1 mutations and risk of CRC in Saudi population and to determine common variants of PARP-1 in Saudi CRC patients and normal individuals. Materials and Methods: DNA samples were isolated from fifty CRC patients and from a comparable number of control subjects then sequenced to detect different variations present in exons 3, 17, and 21 of the PARP-1 gene. Results and Conclusions: When comparing the genotype and allele frequencies of all detected SNPs in CRC patients with those in controls, we found none were significantly different for all variants even the most common SNP in PARP-1 gene (Val762Ala). However, two novel alterations in exon 21 were found to be associated with increased risk of CRC. The variants identified as (1) Lys933Asn [p-value 0.0318] and (2) Lys945Asn [p-value 0.0257]. Our results suggest that PARP-1 Lys933Asn and Lys945Asn alterations could be associated with increased risk of CRC in the Saudi population.

Keywords

References

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