GlyR α3: An Essential Target for Spinal PGE 2 -Mediated Inflammatory Pain Sensitization
Science(2004)
Abstract
Prostaglandin E 2 (PGE 2 ) is a crucial mediator of inflammatory pain sensitization. Here, we demonstrate that inhibition of a specific glycine receptor subtype (GlyR α3) by PGE 2 -induced receptor phosphorylation underlies central inflammatory pain sensitization. We show that GlyR α3 is distinctly expressed in superficial layers of the spinal cord dorsal horn. Mice deficient in GlyR α3 not only lack the inhibition of glycinergic neurotransmission by PGE 2 seen in wild-type mice but also show a reduction in pain sensitization induced by spinal PGE 2 injection or peripheral inflammation. Thus, GlyR α3 may provide a previously unrecognized molecular target in pain therapy.
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