Abstract
The aim of present study was to evaluate the association of common polymorphisms detected in mitochondrial DNA (mtDNA) D-loop region (mononucleotide repetitive D310, single nucleotide polymorphism (SNP) D16521) with susceptibility to gastric cancer (GC) in northwestern Chinese population. A total of 180 GC patients and 218 healthy controls were investigated by using PCR- denaturing high performance liquid chromatography (DHPLC) assay. Genotype and allele distributions and haplotype construction were analyzed in case–control study. We found D310 and D16521 heteroplasmy were significantly different between GC cases and controls (p < 0.05), and D16521 homoplasmy showed association with histological grade of GC (p < 0.05). Haplotype 7C/T, 8C/C and 9C/C had significant association with GC risk implied from analysis of D310 and D16521. Taken together, these findings suggested that mtDNA D-Loop polymorphisms and haplotypes may contribute to genetic susceptibility to GC in Chinese population.
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Abbreviations
- GC:
-
Gastric cancer
- MtDNA:
-
Mitochondrial DNA
- SNP:
-
Single nucleotide polymorphism
- D310:
-
Polytract of cytosines at nucleotide 310 in the mitochondrial genome
- DHPLC:
-
Denaturing high performance liquid chromatography
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Acknowledgements
We express our appreciation to the original DNA donors who made this study possible. This work was supported by a grant from Natural Science Foundation of Gansu province (0710RJZA017), Key Technologies R&D Program (0708NKCA096) from the Gansu Provincial Science and Technology Committee, China, grant of Platform of Genetic Resource of Chinese Project, from the Ministry of Science and Technology PR China (2006DKA21301), and Program for New Century Excellent Talents in University, from the Ministry of Education of PR China (NCET-05-0885), National Natural Science Foundation of China (81071701), and State Key Development Program of Basic Research of China (2010CB834201).
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Li Wei and Yong Zhao contributed equally to this work.
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Wei, L., Zhao, Y., Guo, Tk. et al. Association of mtDNA D-Loop Polymorphisms with Risk of Gastric Cancer in Chinese Population. Pathol. Oncol. Res. 17, 735–742 (2011). https://doi.org/10.1007/s12253-011-9378-7
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DOI: https://doi.org/10.1007/s12253-011-9378-7