Fig. 3

The changes in the levels of IELs and B lymphocytes in mice. a. The changes in the intraepithelium lymphocyte (IEL) amount per 100 epithelial cells of the small intestine in the different treatment groups are depicted. Stress-induced diarrhea resulted in reduced amounts of IELs in the duodenum and jejunum but an increased amount of IELs in the ileum. PCPA pre-treatment reversed the effect of stress-induced diarrhea on the IEL populations. b. The changes in the B lymphocyte proliferation in the intestines of the different treatment groups are depicted. The changes in the B lymphocyte population in the duodenum and jejunum displayed a similar trend to the IEL populations in the duodenum; however, no differences were observed in the B lymphocyte population in the ileum and colon. c. The sIgA levels represent the B lymphocyte immune activity. *p < 0.05, **p < 0.01