Indian Journal of Medical Research

ORIGINAL ARTICLE
Year
: 2014  |  Volume : 139  |  Issue : 6  |  Page : 873--882

Role of genetic & environment risk factors in the aetiology of colorectal cancer in Malaysia


Nurul Hanis Ramzi1, Jagdish Kaur Chahil1, Say Hean Lye1, Khamsigan Munretnam1, Kavitha Itagi Sahadevappa1, Sharmila Velapasamy1, Nikman Adli Nor Hashim1, Soon Keat Cheah2, GerardChin Chye Lim2, Heselynn Hussein3, Mohd Roslan Haron4, Livy Alex1, Lian Wee Ler1 
1 Molecular Research & Service Laboratory, INFOVALLEY® Life Sciences Sdn. Bhd., Selangor, Malaysia
2 Department of Radiotherapy & Oncology, Hospital Kuala Lumpur, Jalan Pahang, Kuala Lumpur, Malaysia
3 Department of General Medicine, Hospital Putrajaya, Putrajaya, Malaysia
4 Department of Radiotherapy & Oncology, Hospital Sultan Ismail, Jalan Persiaran Mutiara Emas Utama, Johor Bahru, Malaysia

Correspondence Address:
Livy Alex
Molecular Research & Service Laboratory, INFOVALLEY ® Life Sciences Sdn. Bhd. Unit 1.1, Level 1, Block B, Mines Waterfront Business Park, 43300 Seri Kembangan, Selangor
Malaysia

Background & objectives: Colorectal cancer (CRC) is second only to breast cancer as the leading cause of cancer-related deaths in Malaysia. In the Asia-Pacific area, it is the highest emerging gastrointestinal cancer. The aim of this study was to identify single nucleotide polymorphisms (SNPs) and environmental factors associated with CRC risk in Malaysia from a panel of cancer associated SNPs. Methods: In this case-control study, 160 Malaysian subjects were recruited, including both with CRC and controls. A total of 768 SNPs were genotyped and analyzed to distinguish risk and protective alleles. Genotyping was carried out using Illumina«SQ»s BeadArray platform. Information on blood group, occupation, medical history, family history of cancer, intake of red meat and vegetables, exposure to radiation, smoking and drinking habits, etc was collected. Odds ratio (OR), 95% confidence interval (CI) were calculated. Results: A panel of 23 SNPs significantly associated with colorectal cancer risk was identified ( p0 <0.01). Of these, 12 SNPs increased the risk of CRC and 11 reduced the risk. Among the environmental risk factors investigated, high intake of red meat (more than 50% daily proportion) was found to be significantly associated with increased risk of CRC (OR=6.52, 95% CI :1.93 - 2.04, P=0.003). Two SNPs including rs2069521 and rs10046 in genes of cytochrome P450 (CYP) superfamily were found significantly associated with CRC risk. For gene-environment analysis, the A allele of rs2069521 showed a significant association with CRC risk when stratified by red meat intake. Interpretation & conclusions: In this preliminary study, a panel of SNPs found to be significantly associated with CRC in Malaysian population, was identified. Also, red meat consumption and lack of physical exercise were risk factors for CRC, while consumption of fruits and vegetables served as protective factor.


How to cite this article:
Ramzi NH, Chahil JK, Lye SH, Munretnam K, Sahadevappa KI, Velapasamy S, Hashim NA, Cheah SK, Lim GC, Hussein H, Haron MR, Alex L, Ler LW. Role of genetic & environment risk factors in the aetiology of colorectal cancer in Malaysia.Indian J Med Res 2014;139:873-882


How to cite this URL:
Ramzi NH, Chahil JK, Lye SH, Munretnam K, Sahadevappa KI, Velapasamy S, Hashim NA, Cheah SK, Lim GC, Hussein H, Haron MR, Alex L, Ler LW. Role of genetic & environment risk factors in the aetiology of colorectal cancer in Malaysia. Indian J Med Res [serial online] 2014 [cited 2020 Jan 29 ];139:873-882
Available from: http://www.ijmr.org.in/article.asp?issn=0971-5916;year=2014;volume=139;issue=6;spage=873;epage=882;aulast=Ramzi;type=0