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Extracellular-regulated protein kinase cascades are activated in response to injury in human skeletal muscle
Research Division, Joslin Diabetes Center, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA.
Copenhagen Muscle Research Center, August Krogh Institute, University of Copenhagen, Copenhagen, Denmark.
Department of Surgery, Karolinska Hospital and Institute, Stockholm, Sweden.
Department of Surgery, Karolinska Hospital and Institute, Stockholm, Sweden.
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1998 (English)In: American Journal of Physiology, ISSN 0002-9513, E-ISSN 2163-5773, Vol. 275, no 2, p. C555-C561Article in journal (Refereed) Published
Abstract [en]

The mitogen-activated protein (MAP) kinase signaling pathways are believed to act as critical signal transducers between stress stimuli and transcriptional responses in mammalian cells. However, it is not known whether these signaling cascades also participate in the response to injury in human tissues. To determine whether injury to the vastus lateralis muscle activates MAP kinase signaling in human subjects, two needle biopsies or open muscle biopsies were taken from the same incision site 30-60 min apart. The muscle biopsy procedures resulted in striking increases in dual phosphorylation of the extracellular-regulated kinases (ERK1 and ERK2) and in activity of the downstream substrate, the p90 ribosomal S6 kinase. Raf-1 kinase and MAP kinase kinase, upstream activators of ERK, were also markedly stimulated in all subjects. In addition, c-Jun NH2-terminal kinase and p38 kinase, components of two parallel MAP kinase pathways, were activated following muscle injury. The stimulation of the three MAP kinase cascades was present only in the immediate vicinity of the injury, a finding consistent with a local rather than systemic activation of these signaling cascades in response to injury. These data demonstrate that muscle injury induces the stimulation of the three MAP kinase cascades in human skeletal muscle, suggesting a physiological relevance of these protein kinases in the immediate response to tissue injury and possibly in the initiation of wound healing.

Place, publisher, year, edition, pages
HighWire Press , 1998. Vol. 275, no 2, p. C555-C561
Keywords [en]
Mitogen-activated protein kinase, signal transduction, stress enzymology
National Category
Medical and Health Sciences Cell Biology Physiology
Identifiers
URN: urn:nbn:se:oru:diva-63891ISI: 000075174400025PubMedID: 9688610Scopus ID: 2-s2.0-0031844165OAI: oai:DiVA.org:oru-63891DiVA, id: diva2:1171088
Note

Funding Agency:

NIAMS NIH HHS

Available from: 2018-01-05 Created: 2018-01-05 Last updated: 2018-02-09Bibliographically approved

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Ljungqvist, Olle

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