The DOI matches its Crossref record; 4 of the 4 references it cites were found in a registry or an index.
β-Defensin-2 Expression Is Regulated by TLR Signaling in Intestinal Epithelial Cells
Abstract
The intestinal epithelium serves as a barrier to the intestinal flora. In response to pathogens, intestinal epithelial cells (IEC) secrete proinflammatory cytokines. To aid in defense against bacteria, IEC also secrete antimicrobial peptides, termed defensins. The aim of our studies was to understand the role of TLR signaling in regulation of β-defensin expression by IEC. The effect of LPS and peptidoglycan on β-defensin-2 expression was examined in IEC lines constitutively or transgenically expressing TLRs. Regulation of β-defensin-2 was assessed using promoter-reporter constructs of the human β-defensin-2 gene. LPS and peptidoglycan stimulated β-defensin-2 promoter activation in a TLR4- and TLR2-dependent manner, respectively. A mutation in the NF-κB or AP-1 site within the β-defensin-2 promoter abrogated this response. In addition, inhibition of Jun kinase prevents up-regulation of β-defensin-2 protein expression in response to LPS. IEC respond to pathogen-associated molecular patterns with expression of the antimicrobial peptide β-defensin-2. This mechanism may protect the intestinal epithelium from pathogen invasion and from potential invaders among the commensal flora.
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Defensins: antimicrobial peptides of innate immunity
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β-Defensins: Linking Innate and Adaptive Immunity Through Dendritic and T Cell CCR6
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Lactoferrin: a natural Glycoprotein involved in iron and inflammatory homeostasis
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Metadata
- Authors
- Vora, P., Youdim, A., Thomas, L. S., Fukata, M., Tesfay, S. Y., Lukasek, K., Michelsen, K. S., Wada, A., Hirayama, T., Arditi, M., & Abreu, M. T.
- Venue
- The Journal of Immunology
- Publisher
- Oxford University Press (OUP)
- Published
- 2004-11-01
- Volume
- 173
- Issue
- 9
- Pages
- 5398-5405
- ISSN
- 0022-1767 (ISSN-L)
- 1550-6606
- OpenAlex
- W2115360262
- Cited by
- 354
- References
- 4
- FWCI
- 26.01
- Type
- journal article
- Language
- en
- Open access
- closed
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