Abstract:
:N-type calcium channels are critical for pain transduction. Inhibitors of these channels are powerful analgesics, but clinical use of current N-type blockers remains limited by undesirable actions in other regions of the nervous system. We now demonstrate that a unique splice isoform of the N-type channel is restricted exclusively to dorsal root ganglia. By a combination of functional and molecular analyses at the single-cell level, we show that the DRG-specific exon, e37a, is preferentially present in Ca(V)2.2 mRNAs expressed in neurons that contain nociceptive markers, VR1 and Na(V)1.8. Cell-specific inclusion of exon 37a correlates closely with significantly larger N-type currents in nociceptive neurons. This unique splice isoform of the N-type channel could represent a novel target for pain management.
journal_name
Neuronjournal_title
Neuronauthors
Bell TJ,Thaler C,Castiglioni AJ,Helton TD,Lipscombe Ddoi
10.1016/s0896-6273(03)00801-8subject
Has Abstractpub_date
2004-01-08 00:00:00pages
127-38issue
1eissn
0896-6273issn
1097-4199pii
S0896627303008018journal_volume
41pub_type
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