Synchronization of Cellular Clocks in the Suprachiasmatic Nucleus

Nov 25, 2003Science (New York, N.Y.)

Coordination of individual cell clocks in the brain's daily rhythm center

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Abstract

The suprachiasmatic nucleus (SCN) exhibits a synchronized gene expression rhythm with a period length of about 24 hours.

  • Clock gene transcription rhythms are synchronized across hundreds of neurons in the SCN.
  • Neuronal clocks are arranged in a specific pattern throughout the SCN, indicating differential phasing.
  • A protein synthesis inhibitor can reset neuronal clocks to the same phase, which is later reestablished through intrinsic interactions.
  • Na+-dependent action potentials play a role in achieving and maintaining synchronization among the cellular clocks.

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