Abstract
We have identified a calcium-dependent pathway in neurons that regulates expression levels of the α1B subunit and N channel current. When neurons are depolarized and voltage-gated calcium channels activated, the half-life of cellular N channel α1B mRNA is prolonged. This stabilizing effect of depolarization is mediated through the 3′ untranslated region of a long form of the α1B mRNA and may represent a form of modulation of N-channel levels that does not require changes in gene transcription. Increases in N channel expression would affect several key neuronal functions controlled by calcium, including transmitter release and neurite outgrowth.
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Acknowledgements
We thank Terry Snutch and Steve Dubel for providing unpublished partial 3′UTR sequence of rbB-I. We are also grateful to Leslie Tolerico, Justin Fallon and Betsy Quinlin for reading the manuscript. This work was done in partial fulfillment of the requirements for a Ph.D. degree from Brown University (S.S.). Supported by NS 29967 and NS 01927 (D.L.) and Training Grant MH19118.
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Schorge, S., Gupta, S., Lin, Z. et al. Calcium channel activation stabilizes a neuronal calcium channel mRNA. Nat Neurosci 2, 785–790 (1999). https://doi.org/10.1038/12153
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DOI: https://doi.org/10.1038/12153
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