Fig. 4.

Distal colon histopathology. a DSS-untreated VIP−/−; b 2.5 % DSS-treated mice VIP−/−; c 2.5 % DSS-treated WT mice. d WT mice treated with 2.5 % DSS and 1 μM VIPHyb. e WT mice treated with 2.5 % DSS and 1 nM PG 97–269. f WT mice treated with 2.5 % DSS and vehicle (saline)