Activation of nuclear factor-kappaB in dogs with chronic enteropathies

Luckschander, N.; Hall, J.A.; Gaschen, F.; Forster, U.; Wenzlow, N.; Hermann, P.; Allenspach, K.; Dobbelaere, Dirk,; Burgener, I.A.; Welle, M. (2010). Activation of nuclear factor-kappaB in dogs with chronic enteropathies. Veterinary immunology and immunopathology, 133(2-4), pp. 228-36. Amsterdam: Elsevier 10.1016/j.vetimm.2009.08.014

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Homeostasis in the intestinal microenvironment between the immune system and luminal antigens appears disturbed in chronic enteropathies. Pro-inflammatory cytokines likely play a role in the pathogenesis of intestinal inflammation. Several inflammatory and immunoregulatory genes have associated nuclear factor-kappaB (NF-kappaB) binding sites, which allow NF-kappaB to regulate gene transcription. The purpose of this study was to investigate (1) the occurrence of NF-kappaB activation during mucosal inflammation in situ, (2) the mucosal distribution pattern of cells expressing activated NF-kappaB within treatment groups, and (3) the effect of specific therapy on NF-kappaB activation. Dogs with chronic enteropathy were studied (n=26) and compared with 13 healthy dogs. Ten dogs had food responsive disease (FRD) and 16 had inflammatory bowel disease (IBD). NF-kappaB activation was detected in duodenal mucosal biopsies using a mouse monoclonal antibody (MAB 3026) that selectively binds the nuclear localization sequence of activated NF-kappaB. To identify macrophages, biopsies were stained using the MAC 387 antibody. Macrophages in the lamina propria double-stained for MAC 387 and NF-kappaB were quantitated; epithelial cell expression of activated NF-kappaB was determined semi-quantitatively. Results showed that more macrophages positive for activated NF-kappaB were present in lamina propria of dogs with chronic enteropathy compared to control dogs (p<0.01). More NF-kappaB positive epithelial cells were observed in FRD dogs compared to IBD dogs (p<0.05). After therapy, the number of macrophages and epithelial cells staining positive for activated NF-kappaB decreased (p<0.01) in chronic enteropathy dogs. In conclusion, activation of NF-kappaB is closely associated with the pathophysiology of canine chronic enteropathy. Down-regulation follows successful therapy.

Item Type:	Journal Article (Original Article)
Division/Institute:	05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Molecular Pathobiology 05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV) > Small Animal Clinic 05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP) > Institute of Animal Pathology
UniBE Contributor:	Dobbelaere, Dirk,, Burgener, Iwan, Welle, Monika Maria
ISSN:	0165-2427
Publisher:	Elsevier
Language:	English
Submitter:	Factscience Import
Date Deposited:	04 Oct 2013 14:35
Last Modified:	05 Dec 2022 14:11
Publisher DOI:	10.1016/j.vetimm.2009.08.014
Web of Science ID:	000273904500017
URI:	https://boris.unibe.ch/id/eprint/14159 (FactScience: 221013)