Correlation between anxiety-depression status and cytokines in diarrhea-predominant irritable bowel syndrome

The aim of this study was to investigate the correlation between anxiety-depression status and cytokines in diarrhea-predominant irritable bowel syndrome (IBS-D). IBS-D patients were divided into an anxiety-depression IBS-D group and a non-anxiety-depression IBS-D group. Patients without IBS, anxiety or depression were selected as the control group. Scoring was performed using the self-rating anxiety scale (SAS) and self-rating depression scale (SDS). Levels of IL-1β and IL-10 in the blood and sigmoid colon mucosa were detected, and the proportions of IL-1β- and IL-10-positive cells in the sigmoid colon mucosa were determined. The results demonstrated that the SDS and SAS scores in the IBS-D group were significantly higher than those in the control group (P<0.05). The levels of IL-1β in the blood and sigmoid colon mucosa and the proportion of IL-1β-positive cells in the sigmoid colon mucosa in the IBS-D group were significantly higher than those in the control group (P<0.05). The levels of IL-10 in the blood and sigmoid colon mucosa and the proportion of IL-10-positive cells in the IBS-D group were significantly lower than those in the control group (P<0.05). The levels of IL-1β in the blood and sigmoid colon mucosa and the proportion of IL-1β-positive cells in the anxiety-depression IBS-D group were significantly higher than those in the non-anxiety-depression IBS-D group, and the levels of IL-10 and the proportion of IL-10-positive cells in the anxiety-depression IBS-D group were significantly lower than those in the non-anxiety-depression IBS-D group (P<0.05). Anxiety-depression status may cause the IL-1β and IL-10 levels in IBS patients to change and result in an imbalance of the proinflammatory and anti-inflammatory cytokines, leading to the occurrence or aggravation of IBS.