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 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.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8191199 | PMC |
| http://dx.doi.org/10.1186/s13027-021-00381-4 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The role of autophagy related 12 (ATG12) in the progression of hepatocellular carcinoma and its prognostic value.
Discov Oncol
December 2024
Department of Hospital Infection Management, Zhongshan Hospital Qingpu Branch, Fudan University, Shanghai, 201700, China.
The aim of our research was to explore the character of autophagy related 12 (ATG12) in the development of hepatocellular carcinoma (HCC). A total of 145 HCC tissues as well as paired adjacent normal tissues were collected, then immunohistochemistry was conducted to access the expression of ATG12. HCC cells were transfected with pcDNA ATG12 or si-ATG12 to overexpress ATG12 or downregulate ATG12.
View Article and Find Full Text PDFThe role of KRT18 in lung adenocarcinoma development: integrative bioinformatics and experimental validation.
Discov Oncol
December 2024
School of Pharmacy, Shaoyang University, Shaoyang, 422000, Hunan, China.
Lung adenocarcinoma (LUAD) represents one of the most common subtypes of lung cancer with high rates of incidence and mortality, which contributes to substantial health and economic demand across the globe. Treatment today mainly consists of surgery, radiotherapy, and chemotherapy, but their efficacy in advanced stages is often suboptimal and emphasizes the clear need for new biomarkers and therapeutic targets. Using comprehensive bioinformatics analyses consisting of the Cancer Genome Atlas (TCGA), Gene Expression Omnibus (GEO), Human Protein Atlas (HPA) and Clinical Proteomic Tumor Analysis Consortium (CPTAC), immune infiltration analysis and functional enrichment analysis, and single-cell analysis, we examined the potential of keratin 18 (KRT18) as a candidate biomarker in advanced LUAD.
View Article and Find Full Text PDFA Comparison of Internal, Marginal, and Incisal Gaps in Zirconia Laminates Fabricated Using Subtractive Manufacturing and 3D Printing Methods.
Biomimetics (Basel)
November 2024
Department of Dental Laboratory Science, College of Health Science, Catholic University of Pusan, 57 Oryundae-ro, Geumjeong-gu, Busan 46252, Republic of Korea.
DLP printing is a new method for producing zirconia laminates that ensure clinically acceptable gaps in the internal, marginal, and incisal regions. A typical model of a central maxillary incisor was prepped by a dentist and scanned. The laminate was designed using CAD software version 2023.
View Article and Find Full Text PDFElectronic Structure Modulation Induced by the Synergy of Cobalt Low-Nuclearity Clusters and Mononuclear Sites for Efficient Oxygen Electrocatalysis.
ACS Nano
December 2024
School of Chemistry and Materials Science, Nanjing University of Information Science & Technology, Nanjing 210044, PR China.
The development of high-performance bifunctional single-atom catalysts for use in applications, such as zinc-air batteries, is greatly impeded by mild oxygen reduction and evolution reactions (ORR and OER). Herein, we report a bifunctional oxygen electrocatalyst designed to overcome these limitations. The catalyst consists of well-dispersed low-nuclearity Co clusters and adjacent Co single atoms over a nitrogen-doped carbon matrix (Co/NC).
View Article and Find Full Text PDFTargeting LncRNA is a Promising Therapeutic Strategy to Inhibit the Progression of Bladder Cancer.
Discov Med
December 2024
Department of Urology, The 908th Hospital of Joint Logistic Support Force of PLA, 330000 Nanchang, Jiangxi, China.
Background: Bladder cancer (BC) is a malignant tumor that begins in the cells of the bladder, characterized by poor cell differentiation and strong invasion capacity, with a high incidence rate. Identifying key molecules that enhance BC cells' cisplatin sensitivity can help improve the clinical efficacy of BC treatment. Hence, this study aimed to determine the expression level of long non-coding RNA (lncRNA) ADAM Metallopeptidase with Thrombospondin Type 1 Motif 9 Antisense RNA 1 () in BC and explore its related mechanism underlying the amplification of cisplatin sensitivity.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!