The mRNA levels ofIl1b(B),Il10(C),Il17(D), andIfng(E) in different intestinal segments in the PI-IBS (n = 8) and control (n = 8) groups. A. Representative graphs of the PCR assay. Lanes 1, 3, 5, and 7 are duodenum, jejunum, ileum and colon of the PI-IBS group, respectively; lanes 2, 4, 6, and 8 are duodenum, jejunum, ileum and colon of the control group, respectively. Black: PI-IBS group, white: control group. Date are presented as mean ± SD. *P < 0.05, **P < 0.01 versus control group.