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Induction of ethanol dependence increases signal peptidase mRNA levels in rat brain

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Abstract

Differential Northern blot hybridization was used as a screening tool to identify mRNAs that respond quantitatively to the induction of ethanol dependence. Adult male rats were treated with repeated, high doses of ethanol for 4 consecutive days. This regimen resulted in the development of tolerance and dependence upon ethanol. RNA isolated from the ethanol-dependent rat brains was used to construct a cDNA library. One cDNA was identified that hybridized to a mRNA which increased in rat brain during the ethanol treatment. Sequence analysis of the cDNA indicated that it recognized a mRNA in rat brain which was very similar to that which encodes the 18 kDa subunit of canine signal peptidase. The rat signal peptidase mRNA was observed to increase in brain nearly 2-fold within 48 h after the initiation of ethanol treatment. Ethanol did not significantly alter β-actin mRNA levels during the treatment period. These results support the existence of an ethanol-responsive signal peptidase mRNA in rat brain.

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Authors and Affiliations

  1. Department of Pharmacology, Northeastern Ohio Universities College of Medicine, P.O. Box 95, 44272, Rootstown, Ohio, USA

    Steven A. Signs & Robin Jacquet

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  1. Steven A. Signs
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  2. Robin Jacquet
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Signs, S.A., Jacquet, R. Induction of ethanol dependence increases signal peptidase mRNA levels in rat brain. Mol Cell Biochem 139, 21–26 (1994). https://doi.org/10.1007/BF00944199

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  • DOI: https://doi.org/10.1007/BF00944199

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