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C-36 peptide, a deg...
C-36 peptide, a degradation product of alpha1-antitrypsin, modulates human monocyte activation through LPS signaling pathways.
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- Subramaniyam, Devipriya (author)
- Lund University,Lunds universitet,Institutionen för kliniska vetenskaper, Malmö,Medicinska fakulteten,Department of Clinical Sciences, Malmö,Faculty of Medicine
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- Glader, Pernilla (author)
- Lund University,Lunds universitet,Lungmedicin, allergologi och palliativ medicin,Sektion II,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Respiratory Medicine, Allergology, and Palliative Medicine,Section II,Department of Clinical Sciences, Lund,Faculty of Medicine
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von Wachenfeldt, Karin (author)
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Burneckiene, Jurate (author)
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Stevens, Tim (author)
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- Janciauskiene, Sabina (author)
- Lund University,Lunds universitet,Enheten för kroniska inflammatoriska och degenerativa sjukdomar,Forskargrupper vid Lunds universitet,Chronic Inflammatory and Degenerative Diseases Research Unit,Lund University Research Groups
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(creator_code:org_t)
- Elsevier BV, 2006
- 2006
- English.
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In: International Journal of Biochemistry & Cell Biology. - : Elsevier BV. - 1878-5875 .- 1357-2725. ; 38:4, s. 563-575
- Related links:
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http://www.ncbi.nlm....
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Subject headings
Close
- alpha 1-Antitrypsin (AAT), a major endogenous inhibitor of serine proteases, plays an important role in minimizing proteolytic injury to host tissue at sites of infection and inflammation. There is now increasing evidence that AAT undergoes post-translational modifications to yield by-products With novel biological activity. One Such molecule, the C-terminal fragment of AAT, corresponding to residues 359-394 (C-36 peptide) has been reported to stimulate significant pro-inflammatory activity in monocytes and neutrophils in vitro. In this study we showed that C-36 peptide is present in human lung tissue and mimics the effects of lipopolysaccharide (LIPS), albeit with lower magnitude, by inducing monocyte cytokine (TNF alpha, IL-I beta) and chemokine (IL-8) release in conjunction with the activation of nuclear factor-kappa B (NF-kappa B). Using receptor blocking antibodies and protein kinase inhibitors, we further demonstrated that C-36, like LPS, utilizes CD14 and Toll-like receptor 4 (TLR4) receptors and enzymes of the mitogen-activated protein kinase (MAPK) signaling pathways to stimulate monocyte TNF alpha release. The specificity of C-36 effects were demonstrated by failure of a shorter peptide (C-20) to elicit biological activity and the failure of C-36 to inhibit M/CD28-stimulated IL-2 receptor expression or proliferation in T-cells which lack TLR4 and CD14. We suggest that C-36 mediates its effects though the activation of LPS signaling pathways. (c) 2005 Elsevier Ltd. All rights reserved.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine (hsv//eng)
Keyword
- alpha 1-antitrypsin
- C-36 peptide of alpha 1-antitrypsin
- monocytes
- endotoxin
- lipopolysaccharide
Publication and Content Type
- art (subject category)
- ref (subject category)
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