Human and Animal Genetics
Ethanol Tolerance and Withdrawal Severity in High Drinking in the Dark Selectively Bred Mice
Version of Record online: 6 FEB 2012
Copyright © 2012 by the Research Society on Alcoholism
Alcoholism: Clinical and Experimental Research
Volume 36, Issue 7, pages 1152–1161, July 2012
How to Cite
Crabbe, J. C., Colville, A. M., Kruse, L. C., Cameron, A. J., Spence, S. E., Schlumbohm, J. P., Huang, L. C. and Metten, P. (2012), Ethanol Tolerance and Withdrawal Severity in High Drinking in the Dark Selectively Bred Mice. Alcoholism: Clinical and Experimental Research, 36: 1152–1161. doi: 10.1111/j.1530-0277.2011.01715.x
- Issue online: 10 JUL 2012
- Version of Record online: 6 FEB 2012
- Manuscript Accepted: 8 NOV 2011
- Manuscript Received: 28 SEP 2011
- Selected Mouse Lines;
- High Drinking in the Dark (HDID) Mice;
- Genetic Correlation;
Mouse lines are being selectively bred in replicate for high blood ethanol concentrations (BECs) achieved after limited access of ethanol (EtOH) drinking early in the circadian dark phase. High Drinking in the Dark-1 (HDID-1) mice are in selected generation S21, and the replicate HDID-2 line in generation S14. Tolerance and withdrawal symptoms are 2 of the 7 diagnostic criteria for alcohol dependence. Withdrawal severity has been found in mouse studies to be negatively genetically correlated with EtOH preference drinking.
To determine other traits genetically correlated with high DID, we compared naïve animals from both lines with the unselected, segregating progenitor stock, HS/Npt. Differences between HDID-1 and HS would imply commonality of genetic influences on DID and these traits.
Female HDID-1 and HDID-2 mice tended to develop less tolerance than HS to EtOH hypothermia after their third daily injection. A trend toward greater tolerance was seen in the HDID males. HDID-1, HDID-2, and control HS lines did not differ in the severity of acute or chronic withdrawal from EtOH as indexed by the handling-induced convulsion (HIC). Both HDID-1 and HDID-2 mice tended to have greater HIC scores than HS regardless of drug treatment.
These results show that tolerance to EtOH's hypothermic effects may share some common genetic control with reaching high BECs after DID, a finding consistent with other data regarding genetic contributions to EtOH responses. Withdrawal severity was not negatively genetically correlated with DID, unlike its correlation with preference drinking, underscoring the genetic differences between preference drinking and DID. HDID lines showed greater basal HIC scores than HS, suggestive of greater central nervous system excitability.