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Cytokines and the hepatic acute phase response

H Moshage1

  • 1Department of Medicine, University Hospital Groningen, The Netherlands. h.moshage@med.rug.nl

The Journal of Pathology
|March 1, 1997
PubMed
Summary

The acute phase response involves proteins that restore homeostasis after injury or inflammation. Mechanisms like soluble receptors limit harmful cytokine activity, crucial for managing inflammation and tissue repair.

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Area of Science:

  • Biochemistry
  • Immunology
  • Molecular Biology

Background:

  • The acute phase response is a key biological process initiated by tissue injury, infection, or inflammation.
  • Acute phase proteins are central to restoring homeostasis, while cytokines mediate this response.
  • Mechanisms regulating cytokine activity, such as soluble receptors and antagonists, are vital due to the potential harm from prolonged cytokine action.

Purpose of the Study:

  • To elucidate the mechanisms underlying the acute phase response.
  • To explore the role of cytokines and their regulatory pathways in inflammation.
  • To investigate the function of acute phase proteins, particularly alpha 2-macroglobulin, in liver injury and fibrosis.

Main Methods:

  • Analysis of cytokine signaling pathways from receptor interaction to gene transcription.
  • Examination of intracellular signaling cascades triggered by cytokine-receptor binding.
  • Investigating the transcriptional regulation of acute phase genes via transcription factors.
  • Studying local hepatic acute phase responses in models of injury and fibrosis.

Main Results:

  • Cytokine-receptor interactions activate distinct intracellular signaling pathways.
  • Cytokine-inducible transcription factors regulate the expression of acute phase genes.
  • Local inflammatory processes in the liver, such as partial hepatectomy and hepatic fibrosis, can elicit a localized acute phase response.
  • Induced acute phase proteins likely mitigate proteolytic and fibrogenic activity, limiting tissue damage.

Conclusions:

  • The acute phase response is a complex, regulated process involving cytokine signaling and transcriptional control.
  • Acute phase proteins play a protective role in limiting tissue damage during inflammation and injury, especially in the liver.
  • Alpha 2-macroglobulin may have a significant function in the context of hepatic fibrosis, warranting further investigation.

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