Purpose: This study aimed to determine the effect of tumor resection on dysbiosis of the intestinal microbiota in patients with right-sided colon cancer.
Methods: This study utilized a longitudinal design to explore the outcomes of patients diagnosed with right-sided colon cancer who underwent surgical resection at Dr. M. Djamil General Hospital from July to December 2023. We excluded patients with a documented history of comorbidities, specifically those affecting the digestive system. To compare the microbiota (genus and phylum) between patients with right-sided colon cancer and the control group, we conducted bivariate analyses using the independent t-test or Mann-Whitney test. Furthermore, we employed the dependent t-test or Wilcoxon test to assess changes in the dysbiosis of the microbiota (genus and phylum) before and after resection. A P-value of <0.05 was considered statistically significant.
Results: This study included a total of 21 patients diagnosed with right-sided colon cancer. In the control group, Bacteroidetes constituted the highest proportion of intestinal microbiota, accounting for 56.34%. Prior to tumor resection, the intestinal microbiota of patients exhibited Proteobacteria as the predominant phylum, representing 52.97%. Following tumor resection, Bacteroidetes remained the most prevalent, comprising 50.9% of the intestinal microbiota. Significant variations in the levels of Proteobacteria, Verrucomicrobia, and Cyanobacteria/Chloroplast were observed in the intestinal microbiota of patients with right-sided colorectal cancer before and after tumor excision (all P=0.001).
Conclusions: The microbiome of patients with right-sided colorectal cancer differed significantly from that of the control group. However, following tumor resection, the microbiome composition of these patients became more similar to that observed in the control group.
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