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Biological Chemistry

Editor-in-Chief: Brüne, Bernhard

Editorial Board: Buchner, Johannes / Lei, Ming / Ludwig, Stephan / Sies, Helmut / Thomas, Douglas D. / Turk, Boris / Wittinghofer, Alfred

12 Issues per year


IMPACT FACTOR 2017: 3.022

CiteScore 2017: 2.81

SCImago Journal Rank (SJR) 2017: 1.562
Source Normalized Impact per Paper (SNIP) 2017: 0.705

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ISSN
1437-4315
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Volume 387, Issue 12

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Endogenous anti-inflammatory substances, inter-α-inhibitor and bikunin

Hiroshi Kobayashi
  • Department of Obstetrics and Gynecology, Nara Medical University, 840 Shijo-cho, Kashihara, Nara 634-8522, Japan
  • Other articles by this author:
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Published Online: 2006-11-28 | DOI: https://doi.org/10.1515/BC.2006.192

Abstract

There have been new developments in the elucidation of the biological functions of the inter-α-inhibitor (IαI) family. The anti-proteolytic activity of the IαI family originates from bikunin (also known as urinary trypsin inhibitor). Growing evidence indicates that bikunin is not just an anti-proteolytic agent, but can also be considered an anti-inflammatory agent that suppresses lipopolysaccharide (LPS)-induced cytokine synthesis. Bikunin functions to inhibit calcium influx and extracellular signal-regulated kinase (ERK) signaling via LPS receptors and/or as yet unidentified bikunin signaling receptors. By signaling via the LPS receptor, LPS increases calcium influx and yields phosphorylated ERK, which activates multiple transcription factors, such as nuclear factor κB (NF-κB) or early growth response-1 (Egr-1), which in turn promote cytokine expression. Deficits in the signaling cascades caused by free or cell-bound bikunin are predicted to down-regulate cytokine expression, render macrophages/neutrophils more inactive, and impair inflammatory processes. This brief review largely focuses on our current understanding of the apparent functions of bikunin, its ligands, the effector molecules with which it interacts, and its regulation.

Keywords: bikunin; calcium influx; inflammation; inter-α-inhibitor

About the article

Published Online: 2006-11-28

Published in Print: 2006-12-01


Citation Information: Biological Chemistry, Volume 387, Issue 12, Pages 1545–1549, ISSN (Online) 1437-4315, ISSN (Print) 1431-6730, DOI: https://doi.org/10.1515/BC.2006.192.

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