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Semin Liver Dis 2001; 21(3): 397-416
DOI: 10.1055/s-2001-17554
Copyright © 2001 by Thieme Medical Publishers, Inc., 333 Seventh Avenue, New York, NY 10001, USA. Tel.: +1(212) 584-4662

Cytokine Receptors and Signaling in Hepatic Stellate Cells

Massimo Pinzani, Fabio Marra
  • Dipartimento di Medicina Interna, Università degli Studi di Firenze, Firenze, Italy
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Publication History

Publication Date:
01 October 2001 (online)

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ABSTRACT

Following acute or chronic liver tissue damage, hepatic stellate cells (HSCs) undergo a process of activation toward a phenotype characterized by increased proliferation, motility, contractility, and synthesis of extracellular matrix components. Activation of HSCs is regulated by several soluble factors, including growth factors, cytokines, chemokines, and products of oxidative stress, as well as by extensive changes in the composition and organization of the ECM. Different groups of soluble factors may be classified according to their prevalent biological effect: (a) factors promoting HSC proliferation and/or migration (i.e., platelet-derived growth factor, basic fibroblast growth factor, insulin-like growth factor-1); (b) factors promoting fibrillar ECM accumulation, particularly transforming growth factor-β1; (c) factors with a prevalent contractile effect on HSCs, such as endothelin-1, thrombin, angiotensin-II and vasopressin, although all these agents also may promote HSC proliferation; (d) proinflammatory cytokines and chemokines; and (e) cytokines with a prominent antiinflammatory/antifibrogenic activity, such as interleukin-10 and interferon-γ. Additional important issues are represented by the relationship between cytokine and integrin signaling, and by the effects of oxidative stress-related molecules on cytokine signaling. In the past decade the major intracellular signaling pathways elicited by these factors in HSCs have been greatly elucidated.

KEYWORD

Hepatic stellate cells - cytokine receptors - cytokine signaling - liver tissue damage

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