Volume 16, Issue 3 (September 2024 2024)                   Iranian Journal of Blood and Cancer 2024, 16(3): 63-69 | Back to browse issues page

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Khalilolahi M, Ashrafi F, Moradi A, Nougayre`de J, Mohammad ganji S. The Positive Impact of Virulence Genes in Bacterial Pathogenicity and Colonization on the Large Bowel in Colorectal Cancer Patients. Iranian Journal of Blood and Cancer 2024; 16 (3) :63-69
URL: http://ijbc.ir/article-1-1485-en.html
The Positive Impact of Virulence Genes in Bacterial Pathogenicity and Colonization on the Large Bowel in Colorectal Cancer Patients
Mohammad Khalilolahi1 , Fatemeh Ashrafi1 , Arash Moradi2 , Jean-Philippe Nougayre`de3 , Shahla Mohammad ganji *4
1- Department of Microbiology, Islamic Azad University, North Tehran Branch, Tehran, Iran.
2- Departments of Molecular Medicine, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran.
3- INRA, UMR1225, F-31076 Toulouse, France, and Universite´ de Toulouse, ENVT, UMR1225, F-31076 Toulouse, France
4- Departments of Molecular Medicine, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran , shahla@nigeb.ac.ir
Abstract:   (551 Views)
Colorectal Cancer (CRC) is the third most common cancer around the world. Among the various factors associated with the development of CRC, bacterial infection and related toxins are considered the most critical risk factors. Several virulence genes, including fimC, cnf1, vat1, hlyD, clbB, clbN, feoA, feoB, fyuA, iroN, ireA, iutA, KpsMT (k1), KpsMTII, and KpsMTIII, have been found to have a more significant influence on the pathogenicity of the bacteria. This research aimed to assess the possible position performed through a few virulence genes in E. coli isolated from the intestinal tissues' biopsies of patients with colorectal cancer. Using microbial and biochemical methods, this study isolated 82 samples of E. coli from all of the 170 biopsies obtained from patients suffering from CRC, inflammatory bowel disease, and normal individuals. Then, the frequency of 15 virulence genes was assessed by applying PCR. The obtained results indicated that two types of bacterial genes as following are more likely to be involved in CRC development: clbB and clbN genes, which are associated with the colibactin polyketide synthesis system, as well as KpsMTIII gene, which is involved in polysaccharide capsule synthesis. In precis, these consequences suggest that the superiority of E. coli containing clbB, clbN, and KpsMTIII plays an extensive role in the inflammation and, therefore, the occurrence of CRC.
Keywords: Escherichia coli (E. coli), Intestine's inflammatory disease (IBD), Virulence genes, Colorectal cancer (CRC)
Full-Text [PDF 545 kb]   (371 Downloads)    
: Original Article | Subject: Gastroentrology
Received: 2024/06/19 | Accepted: 2024/09/3 | Published: 2024/09/30
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