Inhibition of Bach1 ameliorates indomethacin-induced intestinal injury in mice.
J Physiol Pharmacol
; 60 Suppl 7: 149-54, 2009 Dec.
Article
in En
| MEDLINE
| ID: mdl-20388958
ABSTRACT
BTB and CNC homolog 1 (Bach1) is a transcriptional repressor of heme oxygenase-1 (HO-1). It plays an important role in the feedback regulation of HO-1 expression, which protects cells from various insults including oxidative stress and inflammatory cytokines. However, the role of Bach1 in intestinal inflammation remains unclear. In this study, the role of Bach1 in intestinal mucosal injury was elucidated using 8-week-old female C57BL/6 (wild-type) and homozygous Bach1-deficient C57BL/6 mice. Intestinal mucosal injuries induced by a single subcutaneous administration of indomethacin were evaluated macroscopically, histologically, and biochemically. Mucosal protein content and chemokine mRNA levels were determined by real-time PCR. Our results showed that the indomethacin-induced intestinal injury was remarkably improved in Bach1-deficient mice. Histological examination showed that the area of injured lesion was decreased in Bach1-deficient mice compared to wild-type mice. Administration of indomethacin induced expression of inflammatory chemokines such as KC, MIP1alpha and MCP1, which was suppressed in Bach1-deficient mice. Myeloperoxidase activity in the intestinal mucosa was also significantly decreased in Bach1-deficient mice. Additionally, Bach1 deficiency enhanced immunopositivity of HO-1 in the intestinal mucosa after indomethacin administration. Disruption of the Bach1 gene thus caused inhibition of mucosal injury, indicating that inhibition of Bach1 may be a novel therapeutic strategy for treating indomethacin-induced intestinal injury.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Ulcer
/
Anti-Inflammatory Agents, Non-Steroidal
/
Indomethacin
/
Basic-Leucine Zipper Transcription Factors
/
Ileitis
/
Intestinal Mucosa
/
Jejunal Diseases
Language:
En
Journal:
J Physiol Pharmacol
Year:
2009
Document type:
Article