Genetic Variation in the ABCB1 Gene May Lead to mRNA Level Chabge: Application to Gastric Cancer Cases

Mansoori, Maryam; Golalipour, Masoud; Alizadeh, Shahriar; Jahangirerad, Ataollah; Khandozi, Seyed Reza; Fakharai, Habibollah; Shahbazi, Majid

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자료유형: 학술저널

저자정보: Mansoori, Maryam (Medical Cellular & Molecular Research Center Talghani Children Hospital of Golestan University of Medical Sciences) Golalipour, Masoud (Medical Cellular & Molecular Research Center Talghani Children Hospital of Golestan University of Medical Sciences) Alizadeh, Shahriar (Pathology Laboratory, Hakim Jorjani Hospital) Jahangirerad, Ataollah (Oncology Department, 5th Golestan University Hospital) Khandozi, Seyed Reza (Oncology Department, 5th Golestan University Hospital) Fakharai, Habibollah (Novarx Corporation) Shahbazi, Majid (Medical Cellular & Molecular Research Center Talghani Children Hospital of Golestan University of Medical Sciences)

저널정보: 아시아태평양암예방학회 Asian Pacific journal of cancer prevention : APJCP Asian Pacific journal of cancer prevention : APJCP 제16권 제18호

발행연도: 2015.1

수록면: 8,467 - 8,471 (5page)

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Background: One of the major mechanisms for drug resistance is associated with altered anticancer drug transport, mediated by the human-adenosine triphosphate binding cassette (ABC) transporter superfamily proteins. The overexpression of adenosine triphosphate binding cassette, sub-family B, member 1 (ABCB1) by multidrug-resistant cancer cells is a serious impediment to chemotherapy. In our study we have studied the possibility that structural single-nucleotide polymorphisms (SNP) are the mechanism of ABCB1 overexpression. Materials and Methods: A total of 101 gastric cancer multidrug resistant cases and 100 controls were genotyped with sequence-specific primed PCR (SSP-PCR). Gene expression was evaluated for 70 multidrug resistant cases and 54 controls by real time PCR. The correlation between the two groups was based on secondary structures of RNA predicted by bioinformatics tool. Results: The results of genotyping showed that among 3 studied SNPs, rs28381943 and rs2032586 had significant differences between patient and control groups but there were no differences in the two groups for C3435T. The results of real time PCR showed over-expression of ABCB1 when we compared our data with each of the genotypes in average mode. Prediction of secondary structures in the existence of 2 related SNPs (rs28381943 and rs2032586) showed that the amount of ${\Delta}G$ for original mRNA is higher than the amount of ${\Delta}G$ for the two mentioned SNPs. Conclusions: We have observed that 2 of our studied SNPs (rs283821943 and rs2032586) may elevate the expression of ABCB1 gene, through increase in mRNA stability, while this was not the case for C3435T.

#Gastric cancer #variation #ABCB1 gene #real time PCR #multidrug resistance #MDR) #over-expression

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