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Annexin II light chain regulates sensory neuron-specific sodium channel expression

Author

Listed:
  • Kenji Okuse

    (University College London)

  • Misbah Malik-Hall

    (University College London)

  • Mark D. Baker

    (University College London)

  • W-Y. Louisa Poon

    (University College London)

  • Haeyoung Kong

    (New York University School of Medicine)

  • Moses V. Chao

    (New York University School of Medicine)

  • John N. Wood

    (University College London)

Abstract

The tetrodotoxin-resistant sodium channel NaV1.8/SNS is expressed exclusively in sensory neurons and appears to have an important role in pain pathways1,2. Unlike other sodium channels, NaV1.8 is poorly expressed in cell lines even in the presence of accessory β-subunits3. Here we identify annexin II light chain4,5 (p11) as a regulatory factor that facilitates the expression of NaV1.8. p11 binds directly to the amino terminus of NaV1.8 and promotes the translocation of NaV1.8 to the plasma membrane, producing functional channels. The endogenous NaV1.8 current in sensory neurons is inhibited by antisense downregulation of p11 expression. Because direct association with p11 is required for functional expression of NaV1.8, disrupting this interaction may be a useful new approach to downregulating NaV1.8 and effecting analgesia6.

Suggested Citation

  • Kenji Okuse & Misbah Malik-Hall & Mark D. Baker & W-Y. Louisa Poon & Haeyoung Kong & Moses V. Chao & John N. Wood, 2002. "Annexin II light chain regulates sensory neuron-specific sodium channel expression," Nature, Nature, vol. 417(6889), pages 653-656, June.
    • Handle: RePEc:nat:nature:v:417:y:2002:i:6889:d:10.1038_nature00781
    DOI: 10.1038/nature00781
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