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Promoter Polymorphism of RRM1 Gene in Korean Lung Cancer Population  

Ko, Kyung Haeng (Department of Internal Medicine, Chonnam National University Medical School, H.Lee Moffitt Cancer Center)
Kim, Eun Joung (Department of Internal Medicine, Chonnam National University Medical School, H.Lee Moffitt Cancer Center)
Oh, In Jae (Department of Internal Medicine, Chonnam National University Medical School, H.Lee Moffitt Cancer Center)
Kim, Soo Ock (Department of Internal Medicine, Chonnam National University Medical School, H.Lee Moffitt Cancer Center)
Son, Jun Gwang (Department of Internal Medicine, Chonnam National University Medical School, H.Lee Moffitt Cancer Center)
Jung, Jong Pil (Department of Internal Medicine, Chonnam National University Medical School, H.Lee Moffitt Cancer Center)
Cho, Gye Jung (Department of Internal Medicine, Chonnam National University Medical School, H.Lee Moffitt Cancer Center)
Ju, Jin Young (Department of Internal Medicine, Chonnam National University Medical School, H.Lee Moffitt Cancer Center)
Kim, Kyu Sik (Department of Internal Medicine, Chonnam National University Medical School, H.Lee Moffitt Cancer Center)
Kim, Yu Il (Department of Internal Medicine, Chonnam National University Medical School, H.Lee Moffitt Cancer Center)
Lim, Sung Chul (Department of Internal Medicine, Chonnam National University Medical School, H.Lee Moffitt Cancer Center)
Kim, Young Chul (Department of Internal Medicine, Chonnam National University Medical School, H.Lee Moffitt Cancer Center)
Bepler, Gerold (Department of Internal Medicine, Chonnam National University Medical School, H.Lee Moffitt Cancer Center)
Publication Information
Tuberculosis and Respiratory Diseases / v.61, no.3, 2006 , pp. 248-255 More about this Journal
Abstract
Background: LOH11A is a region with frequent allele loss (>75%) in lung cancer that is located on the centromeric part of chromosome 11p15.5. Clinical and cell biological studies suggest that this region contains a gene associated with metastatic tumor spread. RRM1 encoding the M1 subunit of ribonucleotide reductase, which is an enzyme that catalyses the rate-limiting step in deoxyribonucleotide synthesis, is located in the LOH11A region. Methods: Polymorphisms were found at nucleotide position (-)37 (C/A) and (-)524 (C/T) from the beginning of exon 1 of the RRM1 gene that might regulate the expression of RRM1. We studied the polymorphisms in 127 Korean individuals (66 lung cancer and 61 normal controls) and compared with those of 140 American patients with lung cancer. Results: CC, AC and AA were found at the (-)37 position in 64(50.4%), 55(43.3%), and 8(6.3%) out of 127 Korean individuals (66 cancer, 61 non-cancer patients), respectively. There was a similar frequency of allele A at (-)37 in the American(27.9%) and Korean population(28.0%). CC, CT and TT was found at the (-)524 position in 24(18.9%), 44(34.6%), and 59(46.5%) out of the 127 Korean individuals, respectively. There was a similar frequency of allele C at (-)524 in the American(34.6%) and Korean population(36.2%). There was no difference in the frequency of the (-)37 and (-)524 genotypes between the cancer and non-cancer group. However there was a significant correlation of the genotypes between (-)37 and (-)524 (p<0.001), which suggests the possible coordination of these polymorphisms in the regulation of the promoter activity of the RRM1 gene. Conclusion: RRM1 promoter polymorphisms were not found to be significant risk factors for lung cancer. However, a further study of the promoter activity and expression of the RRM1 gene according to the pattern of the polymorphism will be needed.
Keywords
RRM1 gene; Promoter polymorphism; Lung cancer; Korean;
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