Exon 8-9 Mutations of DNA Polymerase β in Ovarian Carcinoma Patients from Haldia, India

  • Khanra, Kalyani (Department of Biotechnology, Haldia Institute of Technology) ;
  • Panda, Kakali (Department of Biotechnology, Haldia Institute of Technology) ;
  • Mitra, A.K. (Haldia Seva Sadan) ;
  • Sarkar, Ranu (Department of Pathology, NRS Medical College) ;
  • Bhattacharya, Chandan (Bidhan Chandra Krishi Vishyavidyalaya, Regional Research Station) ;
  • Bhattacharyya, Nandan (Department of Biotechnology, Haldia Institute of Technology)
  • Published : 2012.08.31


Background: Ovarian cancer is the number one killer among all the gynecological cancers. We undertook association study to identify potential alterations in the genomic DNA of a DNA repair gene, DNA polymerase beta ($pol{\beta}$), involved in base excision repair (BER), in ovarian carcinomas of patients from Haldia, India. Mutations, splice variants have been reported earlier in different tumors other than ovarian tumors. Aim: In this study we explored the possibility of association of any mutation of $pol{\beta}$ (Exon 8) with prognosis in 152 ovarian cancer samples. Results: Alteration in the exon 8 region (Exon 8:468, $A{\rightarrow}C$; 15.1%) was noted among fifty seven polymorphism positive samples. Alteration in the intervening sequence 8 (IVS8, -25, $A{\rightarrow}C$; 3.9%) was also noted. All alterations are heterozygous in nature. Conclusions: We found no significant association among the samples from serous type, stage IV, and the $pol{\beta}$ mutations ($P{\leq}0.01$). Only a slight tendency of association was evident between IVS8, -25, A to C; and stage III. Further analysis with a larger number of samples is needed.



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