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* Department of Cell Biology, Oleamide is a sleep-inducing lipid originally
isolated from the cerebrospinal fluid of sleep-deprived
cats. Oleamide was found to potently and selectively inactivate gap junction-mediated communication between rat glial cells. In contrast, oleamide had no effect
on mechanically stimulated calcium wave transmission
in this same cell type. Other chemical compounds traditionally used as inhibitors of gap junctional communication, like heptanol and 18
Department of Chemistry, § The Skaggs Institute for Chemical Biology, The Scripps Research
Institute, La Jolla, California 92037; and
Department of Physiology and Biophysics, University of California, Irvine, California
92717
-glycyrrhetinic acid,
blocked not only gap junctional communication but
also intercellular calcium signaling. Given the central
role for intercellular small molecule and electrical signaling in central nervous system function, oleamide-
induced inactivation of glial cell gap junction channels may serve to regulate communication between brain
cells, and in doing so, may influence higher order neuronal events like sleep induction.
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