Abstract
BACKGROUND
Radical resection is an important method for the treatment of rectal cancer, but the imbalance of intestinal flora and changes in gene expression caused by surgery are not conducive to the improvement of prognosis. It is of great value to explore the changes of intestinal flora and related gene expression after surgery for the formulation of intervention measures.
AIM
To investigate the changes in intestinal flora and microRNA-10a (miR-10a) expression after radical resection of colorectal cancer, and to analyze the effect of microecological enteral nutrition intervention.
METHODS
From July 2017 to June 2020, 107 patients with colorectal cancer undergoing radical resection at our hospital were selected as research subjects. The intestinal flora and miR-10a expression changes of patients with different intestinal flora were compared, and the relationship between the intestinal flora, miR-10a expression, and dysbacteriosis was analyzed. Microecological enteral nutrition intervention was carried out for patients with intestinal flora disorders, and the intestinal flora and miR-10a expression of patients before and after the intervention were compared. Clinical data, intestinal flora, and miR-10a expression of patients with different curative effects were compared. Factors affecting the efficacy of microecological enteral nutrition intervention were analyzed, as well as the value of intestinal flora and miR-10a expression in evaluation of efficacy of microecological enteral nutrition intervention. The correlation between the intestinal flora and the expression of miR-10a in patients with dysbacteriosis was analyzed.
RESULTS
The numbers of colonies of Lactobacillus, Bifidobacterium, and Eubacterium, and miR-10a expression were higher in patients with normal flora after radical resection of colorectal cancer than those in patients with dysbacteriosis degrees Ⅰ and Ⅱ, and in patients with dysbacteriosis degree Ⅰ than in those with dysbacteriosis degree Ⅱ. The number of Enterococcus was lower in patients with normal flora after radical resection of colorectal cancer than in those with dysbacteriosis degrees Ⅰ and Ⅱ, and in patients with dysbacteriosis degree Ⅰ than in those with dysbacteriosis degree Ⅱ (P < 0.05). As the numbers of Lactobacillus, Bifidobacterium, and Eubacterium, and the expression of miR-10a decreased, and the number of Enterococcus increased, the risk of dysbacteriosis in patients after radical resection of colorectal cancer increased (P < 0.05). The numbers of Lactobacillus, Bifidobacterium, and Eubacterium and miR-10a expression were higher and the number of Enterococcus was lower in patients after microecological enteral nutrition intervention than in patients before intervention (P < 0.05). Age, Duke stage, numbers of Lactobacillus, Bifidobacterium, Enterococcus and Eubacterium after intervention, and miR-10a expression were all significantly correlated with the efficacy of microecological enteral nutrition intervention (P < 0.05). After intervention, the areas under the curves of the intestinal flora and miR-10a expression in evaluating the efficacy of microecological enteral nutrition intervention were both > 0.7.
CONCLUSION
The intestinal flora and miR-10a expression changes after radical resection of colorectal cancer are significantly related to the occurrence of dysbacteriosis. Microecological enteral nutrition intervention can effectively regulate the intestinal flora and miR-10a expression, and the intestinal flora and miR-10a expression can be used as indicators to evaluate the intervention efficacy.
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