Biphasic actions of HMGB1 signaling in inflammation and recovery after stroke

Stroke induces a complex web of pathophysiology that may evolve over hours to days and weeks after onset. It is now recognized that inflammation is an important phenomenon that can dramatically influence outcomes after stroke. In this minireview, we explore the hypothesis that inflammatory signals a...

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Veröffentlicht in:Annals of the New York Academy of Sciences 2010-10, Vol.1207 (1), p.50-57
Hauptverfasser: Hayakawa, Kazuhide, Qiu, Jianhua, Lo, Eng H.
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creator Hayakawa, Kazuhide
Qiu, Jianhua
Lo, Eng H.
description Stroke induces a complex web of pathophysiology that may evolve over hours to days and weeks after onset. It is now recognized that inflammation is an important phenomenon that can dramatically influence outcomes after stroke. In this minireview, we explore the hypothesis that inflammatory signals after stroke are biphasic in nature. The high‐mobility group box 1 (HMGB1) protein is discussed as an example of this idea. HMGB1 is normally present in the nucleus. Under ischemic conditions, it is released extracellularly from many types of cells. During the acute phase poststroke, HMGB1 promotes necrosis and influx of damaging inflammatory cells. However, during the delayed phase poststroke, HMGB1 can mediate beneficial plasticity and recovery in many cells of the neurovascular unit. These emerging findings support the hypothesis that inflammation after stroke can be both detrimental and beneficial, depending on the cellular situations involved.
doi_str_mv 10.1111/j.1749-6632.2010.05728.x
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subjects Animals
Cellular
Damage
Extracellular Space - physiology
HMGB1
HMGB1 Protein - physiology
Humans
inflammation
Inflammation - physiopathology
Models, Neurological
Nuclei
Plasticity
Proteins
Receptor for Advanced Glycation End Products
Receptors, Immunologic - physiology
Recovery
Signal Transduction - physiology
stroke
Stroke - physiopathology
stroke recovery
Strokes
Toll-Like Receptor 4 - physiology
title Biphasic actions of HMGB1 signaling in inflammation and recovery after stroke
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