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Neurochemical Research

, Volume 37, Issue 11, pp 2419–2431 | Cite as

Role of Astrocytes in Pain

  • C.-Y. ChiangEmail author
  • B. J. Sessle
  • J. O. Dostrovsky
Overview

Abstract

Over the last decade, a series of studies has demonstrated that glia in the central nervous system play roles in many aspects of neuronal functioning including pain processing. Peripheral tissue damage or inflammation initiates signals that alter the function of the glial cells (microglia and astrocytes in particular), which in turn release factors that regulate nociceptive neuronal excitability. Like immune cells, these glial cells not only react at sites of central and/or peripheral nervous system damage but also exert their action at remote sites from the focus of injury or disease. As well as extensive evidence of microglial involvement in various pain states, there is also documentation that astrocytes are involved, sometimes seemingly playing a more dominant role than microglia. The interactions between astrocytes, microglia and neurons are now recognized as fundamental mechanisms underlying acute and chronic pain states. This review focuses on recent advances in understanding of the role of astrocytes in pain states.

Keywords

Astrocyte Intracellular calcium Gliotransmitter Chemokine Inflammatory pain Neuropathic pain 

Notes

Acknowledgments

This work was supported by the NIH Grant DE-04786 to B.J.S. and CIHR Grant MOP-82831 to J.O.D.

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • C.-Y. Chiang
    • 1
    Email author
  • B. J. Sessle
    • 1
    • 2
  • J. O. Dostrovsky
    • 1
    • 2
  1. 1.Department of Oral Physiology, Faculty of DentistryUniversity of TorontoTorontoCanada
  2. 2.Department of Physiology, Faculty of MedicineUniversity of TorontoTorontoCanada

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