Influence of Morinda citrifolia (Noni) on Expression of DNA Repair Genes in Cervical Cancer Cells

  • Gupta, Rakesh Kumar (Department of Biochemistry, All India Institute of Medical Sciences) ;
  • Bajpai, Deepti (Department of Biochemistry, All India Institute of Medical Sciences) ;
  • Singh, Neeta (Department of Biochemistry, All India Institute of Medical Sciences)
  • Published : 2015.04.29


Background: Previous studies have suggested that Morinda citrifolia (Noni) has potential to reduce cancer risk. Objective: The purpose of this study was to investigate the effect of Noni, cisplatin, and their combination on DNA repair genes in the SiHa cervical cancer cell line. Materials and Methods: SiHa cells were cultured and treated with 10% Noni, $10{\mu}g/dl$ cisplatin or their combination for 24 hours. Post culturing, the cells were pelleted, RNA extracted, and processed for investigating DNA repair genes by real time PCR. Results: The expression of nucleotide excision repair genes ERCC1, ERCC2, and ERCC4 and base excision repair gene XRCC1 was increased 4 fold, 8.9 fold, 4 fold, and 5.5 fold, respectively, on treatment with Noni as compared to untreated controls (p<0.05). In contrast, expression was found to be decreased 22 fold, 13 fold, 16 fold, and 23 fold on treatment with cisplatin (p<0.05). However, the combination of Noni and cisplatin led to an increase of 2 fold, 1.6 fold, 3 fold, 1.2 fold, respectively (p<0.05). Conclusions: Noni enhanced the expression of DNA repair genes by itself and in combination with cisplatin. However, high expression of DNA repair genes at mRNA level only signifies efficient DNA transcription of the above mentioned genes; further investigations are needed to evaluate the DNA repair protein expression.


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