Catherine A. Abbott and Gordon S. Howarth contributed equally to this study.
Development and resolution of experimental colitis in mice with targeted deletion of dipeptidyl peptidase IV†
Article first published online: 7 MAR 2005
Copyright © 2005 Wiley-Liss, Inc.
Journal of Cellular Physiology
Volume 204, Issue 2, pages 687–692, August 2005
How to Cite
Geier, M. S., Tenikoff, D., Yazbeck, R., McCaughan, G. W., Abbott, C. A. and Howarth, G. S. (2005), Development and resolution of experimental colitis in mice with targeted deletion of dipeptidyl peptidase IV. J. Cell. Physiol., 204: 687–692. doi: 10.1002/jcp.20333
- Issue published online: 26 MAY 2005
- Article first published online: 7 MAR 2005
- Manuscript Accepted: 13 DEC 2004
- Manuscript Received: 15 NOV 2004
- Channel 7 Children's Medical Research Foundation of South Australia
Glucagon-like peptide-2 (GLP-2) is a potent intestinotrophic growth factor that enhances repair of damaged intestinal tissue. However, its bioactivity is limited by dipeptidyl peptidase IV (DPIV)-mediated degradation. We hypothesized that DPIV−/− mice would display an increased resistance to, and an enhanced recovery from, dextran sulfate sodium (DSS)-induced colitis compared to DPIV+/+ mice. DPIV+/+ and DPIV−/− mice consumed 2% DSS for 6 days, followed by a 15 day recovery period. Mice were killed at days 0, 3, 6, 9, 14, and 21 (n = 6–8) and the small intestine and colon removed for histological assessment of villus height, crypt depth, and crypt area. The epithelial cell proliferative labeling index was determined by proliferating cell nuclear antigen (PCNA) immunostaining. Small intestine, colon, and total body weight did not differ between DPIV+/+ and DPIV−/− mice. Distal colon crypt depth did not differ significantly between DPIV+/+ and DPIV−/− mice during the development of DSS-colitis or during the recovery phase. Similarly no significant effects were apparent on distal colon crypt area or PCNA labeling index between DPIV+/+ and DPIV−/− during the development of and recovery from DSS-colitis. However, DPIV−/− mice still possessed significant levels of plasma DPIV-like activity. We conclude that loss of DPIV activity does not increase resistance to experimental colitis and hypothesize that other DPIV family members may also be involved in the cleavage of GLP-2. © 2005 Wiley-Liss, Inc.