Both endogenous and exogenous miR-139–5p inhibit Fusobacterium nucleatum-related colorectal cancer development

2020 ◽  
Vol 888 ◽  
pp. 173459
Author(s):  
Yuyu Zhao ◽  
Qianying Tao ◽  
Shaoyu Li ◽  
Peiyong Zheng ◽  
Jianwen Liu ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Fusobacterium Nucleatum ◽  
Cancer Development

scholarly journals Conversion from epithelial to partial-EMT phenotype by Fusobacterium nucleatum infection promotes invasion of oral cancer cells

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Wenhua Shao ◽  
Natsumi Fujiwara ◽  
Yasuhiro Mouri ◽  
Satoru Kisoda ◽  
Kayo Yoshida ◽  
...  
Keyword(s):  
Gene Expression ◽  
Colorectal Cancer ◽  
Cancer Cells ◽  
Epithelial Mesenchymal Transition ◽  
Fusobacterium Nucleatum ◽  
Cancer Development ◽  
Mesenchymal Transition ◽  
Epithelial Phenotype ◽  
Oral Cancer Cells ◽  
Metastatic Risk

Abstract The ability of cancer cells to undergo partial-epithelial mesenchymal transition (p-EMT), rather than complete EMT, poses a higher metastatic risk. Although Fusobacterium nucleatum mainly inhabits in oral cavity, attention has been focused on the F. nucleatum involvement in colorectal cancer development. Here we examined the p-EMT regulation by F. nucleatum in oral squamous cell carcinoma (OSCC) cells. We cultured OSCC cells with epithelial, p-EMT or EMT phenotype with live or heat-inactivated F. nucleatum. Expression of the genes involved in epithelial differentiation, p-EMT and EMT were examined in OSCC cells after co-culture with F. nucleatum by qPCR. Cell growth and invasion of OSCC cells were also examined. Both live and heat-inactivated F. nucleatum upregulated the expression of p-EMT-related genes in OSCC cells with epithelial phenotype, but not with p-EMT or EMT phenotype. Moreover, F. nucleatum promoted invasion of OSCC cells with epithelial phenotype. Co-culture with other strains of bacteria other than Porphyromonas gingivalis did not alter p-EMT-related genes in OSCC cells with epithelial phenotype. F. nucleatum infection may convert epithelial to p-EMT phenotype via altering gene expression in OSCC. Oral hygiene managements against F. nucleatum infection may contribute to reduce the risk for an increase in metastatic ability of OSCC.

scholarly journals The Four Horsemen in Colon Cancer

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Marco Antonio Hernández-Luna ◽  
Sergio López-Briones ◽  
Rosendo Luria-Pérez
Keyword(s):  
Colorectal Cancer ◽  
Escherichia Coli ◽  
Gastrointestinal Tract ◽  
Salmonella Enterica ◽  
Bacteroides Fragilis ◽  
Fusobacterium Nucleatum ◽  
Cancer Development ◽  
Gastrointestinal Neoplasms ◽  
Intestinal Dysbiosis ◽  
Incidence And Mortality

Worldwide, neoplasms of the gastrointestinal tract have a very high incidence and mortality. Among these, colorectal cancer, which includes colon and rectum malignancies, representing both highest incidence and mortality. While gallbladder cancer, another neoplasm associated to gastrointestinal tract occurs less frequently. Genetic factors, inflammation and nutrition are important risk factors associated with colorectal cancer development. Likewise, pathogenic microorganisms inducing intestinal dysbiosis have become an important scope to determine the role of bacterial infection on tumorigenesis. Interestingly, in human biopsies of different types of gastrointestinal tract cancer, the presence of different bacterial strains, such as Fusobacterium nucleatum, Escherichia coli, Bacteroides fragilis and Salmonella enterica have been detected, and it has been considered as a high-risk factor to cancer development. Therefore, pathogens infection could contribute to neoplastic development through different mechanisms; including intestinal dysbiosis, inflammation, evasion of tumoral immune response and activation of pro-tumoral signaling pathways, such as β catenin. Here, we have reviewed the suggested bacterial molecular mechanisms and their possible role on development and progression of gastrointestinal neoplasms, focusing mainly on colon neoplasms, where the bacteria Fusobacterium nucleatum, Escherichia coli, Bacteroides fragilis and Salmonella enterica infect.

scholarly journals A prospective interventional trial on the effect of periodontal treatment on Fusobacterium nucleatum abundance in patients with colorectal tumours

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Tsutomu Yoshihara ◽  
Mitomu Kioi ◽  
Junichi Baba ◽  
Haruki Usuda ◽  
Takaomi Kessoku ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Fusobacterium Nucleatum ◽  
Periodontal Treatment ◽  
Cancer Development ◽  
Low Grade ◽  
Before And After ◽  
Group A ◽  
Stool Samples ◽  
Low Grade Dysplasia ◽  
Colorectal Tumours

AbstractFusobacterium nucleatum is associated with the progression of colorectal cancer. Thus, the possibility of preventing colorectal cancer or its progression by targeting F. nucleatum has been explored. As F. nucleatum is associated with periodontitis, we analysed whether treating periodontitis could influence F. nucleatum abundance in the colon. Patients with colorectal tumours who underwent colonoscopy were recruited. Patients diagnosed with periodontitis by a dentist were treated for approximately 3 months. Endoscopic resection of colorectal tumours was performed after periodontitis treatment, and resected tumours were pathologically classified as high-(HGD) or low-grade dysplasia (LGD). Saliva and stool samples were collected before and after the treatment. Of the 58 patients with colorectal tumours, 31 were included in the study, 16 showed improvement in periodontitis, and 11 showed no improvement. Stool F. nucleatum levels before treatment were significantly lower in the LGD group than in the HGD group. A significant decrease in faecal F. nucleatum levels was observed in patients who underwent successful treatment but not in those whose treatment failed. Salivary F. nucleatum levels were not altered in patients despite periodontal treatment. Thus, successful periodontitis treatment reduces stool F. nucleatum levels and may aid research on periodontitis and suppression of colorectal cancer development.

Increased serum MMP-2, MMP-7, MMP-9, TIMP-1 and TIMP-2 levels in colorectal cancer development

2011 ◽  
Vol 49 (05) ◽  
Author(s):  
I Hritz ◽  
Z Varga ◽  
M Juhász ◽  
P Miheller ◽  
Z Tulassay ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Cancer Development

Fusobacterium nucleatum Promotes Colorectal Cancer Metastasis by Modulating KRT7-AS/KRT7

2019 ◽  
Author(s):  
Shujie Chen ◽  
Tingting Su ◽  
Ying Zhang ◽  
Allen Lee ◽  
Jiamin He ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Cancer Metastasis ◽  
Fusobacterium Nucleatum ◽  
Colorectal Cancer Metastasis

Biomarkers for Early Detection of Colitis-associated Colorectal Cancer - Current Concepts, Future Trends

2020 ◽  
Vol 22 (1) ◽  
pp. 137-145
Author(s):  
Tomasz Mackiewicz ◽  
Aleksander Sowa ◽  
Jakub Fichna
Keyword(s):  
Colorectal Cancer ◽  
Early Detection ◽  
Cancer Development ◽  
Sporadic Colorectal Cancer ◽  
Future Trends ◽  
Significant Progress ◽  
Current Standard ◽  
Risk Of Cancer ◽  
Histological Testing ◽  
Made In

: Colitis-associated colorectal cancer (CAC) remains a critical complication of ulcerative colitis (UC) with mortality of approximately 15%, which makes early CAC diagnosis crucial. The current standard of surveillance, with repetitive colonoscopies and histological testing of biopsied mucosa samples is burdensome and expensive, and therefore less invasive methods and reliable biomarkers are needed. Significant progress has been made thanks to continuous extensive research in this field, however no clinically relevant biomarker has been established so far. This review of the current literature presents the genetic and molecular differences between CAC and sporadic colorectal cancer and covers progress made in the early detection of CAC carcinogenesis. It focuses on biomarkers under development, which can be easily tested in samples of body fluids or breath and, once made clinically available, will help to differentiate between progressors (UC patients who will develop dysplasia) from non-progressors and enable early intervention to decrease the risk of cancer development.

Serrated polyposis syndrome and the role of serrated polyps in colorectal cancer development

2012 ◽  
Vol 1 (1) ◽  
pp. 37-47
Author(s):  
Karam Singh Boparai ◽  
Yark Hazewinkel ◽  
Evelien Dekker
Keyword(s):  
Colorectal Cancer ◽  
Cancer Development ◽  
Polyposis Syndrome ◽  
Serrated Polyps

scholarly journals Association between colorectal cancer and Fusobacterium nucleatum and Bacteroides fragilis bacteria in Iranian patients: a preliminary study

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Aref Shariati ◽  
Shabnam Razavi ◽  
Ehsanollah Ghaznavi-Rad ◽  
Behnaz Jahanbin ◽  
Abolfazl Akbari ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Relative Abundance ◽  
Normal Tissue ◽  
Bacteroides Fragilis ◽  
Fusobacterium Nucleatum ◽  
Normal Mucosa ◽  
Clinicopathologic Characteristics ◽  
Tissue Samples ◽  
Adjacent Normal Mucosa ◽  
Iranian Patients

Abstract Background and aim Recent studies have proposed that commensal bacteria might be involved in the development and progression of gastrointestinal disorders such as colorectal cancer (CRC). Therefore, in this study, the relative abundance of Fusobacterium nucleatum, Bacteroides fragilis, Streptococcus bovis/gallolyticus, and Enteropathogenic Escherichia coli (EPEC) in CRC tissues, and their association with clinicopathologic characteristics of CRC was investigated in Iranian patients. Moreover, the role of these bacteria in the CRC-associated mutations including PIK3CA, KRAS, and BRAF was studied. Method To these ends, the noted bacteria were quantified in paired tumors and normal tissue specimens of 30 CRC patients, by TaqMan quantitative Real-Time Polymerase Chain Reaction (qPCR). Next, possible correlations between clinicopathologic factors and mutations in PIK3CA, KRAS, and BRAF genes were analyzed. Results In studied samples, B. fragilis was the most abundant bacteria that was detected in 66 and 60% of paired tumor and normal samples, respectively. Furthermore, 15% of the B. fragilis-positive patients were infected with Enterotoxigenic B. fragilis (ETBF) in both adenocarcinoma and matched adjacent normal samples. F. nucleatum was also identified in 23% of tumors and 13% of adjacent normal tissue samples. Moreover, the relative abundance of these bacteria determined by 2-ΔCT was significantly higher in CRC samples than in adjacent normal mucosa (p < 0.05). On the other hand, our findings indicated that S. gallolyticus and EPEC, compared to adjacent normal mucosa, were not prevalent in CRC tissues. Finally, our results revealed a correlation between F. nucleatum-positive patients and the KRAS mutation (p = 0.02), while analyses did not show any association between bacteria and mutation in PIK3CA and BRAF genes. Conclusion The present study is the first report on the analysis of different bacteria in CRC tissue samples of Iranian patients. Our findings revealed that F. nucleatum and B. fragilis might be linked to CRC. However, any link between gut microbiome dysbiosis and CRC remains unknown.

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