The relationship between environmental and genetic factors in the regulation of alcohol consumption, while often cited as important, are not well understood. While a number of studies have examined the effects of various environmental factors on alcohol consumption, only a few of these have attempted to determine how these factors might interact with genetic factors. During the last grant period, we have found that several behavioral factors can impact ethanol consumption and that several of these factors interact with each other. Depending on the type of introduction (initiation) to alcohol, the amount, concentration, and cost of the ethanol and time/day it is available all effect intake. The most important finding has been that intake appears to be mostly regulated by the number of discrete drinking bouts which occur during a day and not by the size of these individual bouts. This appears true for both nonselected rats as well as for both the Indiana P and NP rat. The proposed studies will expand on these studies by examining the effects of initiation and an environmental variable upon drinking patterns of several lines of rats. By using the same behavioral procedure, in the same laboratory across several lines of selectively bred animals who differ in their alcohol preference, we hope to be able to address the question of the interaction between these genetic selections and environmental factors which are known to impact ethanol consumption. An additional set of studies is proposed to continue to explore added models of drinking initiation, with the goal of providing other models of alcohol self-administration which may better resemble excessive drinking patterns.

Agency
National Institute of Health (NIH)
Institute
National Institute on Alcohol Abuse and Alcoholism (NIAAA)
Type
Research Project (R01)
Project #
2R01AA006845-09
Application #
3568364
Study Section
Biochemistry, Physiology and Medicine Subcommittee (ALCB)
Project Start
1993-01-01
Project End
1999-02-28
Budget Start
1994-03-01
Budget End
1995-02-28
Support Year
9
Fiscal Year
1994
Total Cost
Indirect Cost
Name
Wake Forest University Health Sciences
Department
Type
DUNS #
041418799
City
Winston-Salem
State
NC
Country
United States
Zip Code
27106
Samson, Herman H; Chappell, Ann M (2004) Effects of raclopride in the core of the nucleus accumbens on ethanol seeking and consumption: the use of extinction trials to measure seeking. Alcohol Clin Exp Res 28:544-9
Samson, Herman H; Cunningham, Christopher L; Czachowski, Cristine L et al. (2004) Devaluation of ethanol reinforcement. Alcohol 32:203-12
Czachowski, Cristine L; Legg, Brooke H; Samson, Herman H (2003) Assessment of sucrose and ethanol reinforcement: the across-session breakpoint procedure. Physiol Behav 78:51-9
Samson, Herman H; Chappell, Ann (2003) Dopaminergic involvement in medial prefrontal cortex and core of the nucleus accumbens in the regulation of ethanol self-administration: a dual-site microinjection study in the rat. Physiol Behav 79:581-90
Samson, Herman H; Czachowski, Cristine L; Chappell, Ann et al. (2003) Measuring the appetitive strength of ethanol: use of an extinction trial procedure. Alcohol 31:77-86
Samson, Herman H; Czachowski, Cristine L (2003) Behavioral measures of alcohol self-administration and intake control: rodent models. Int Rev Neurobiol 54:107-43
Samson, Herman H; Chappell, Ann (2003) Failure of a schedule-induction procedure to increase ethanol intake in an established limited-access self-administration condition. Alcohol 31:161-5
Czachowski, Cristine L; Santini, Lindsay A; Legg, Brooke H et al. (2002) Separate measures of ethanol seeking and drinking in the rat: effects of remoxipride. Alcohol 28:39-46
Samson, Herman H; Chappell, Ann (2002) Reinstatement of ethanol seeking responding after ethanol self-administration. Alcohol 26:95-101
Sim-Selley, Laura J; Sharpe, Amanda L; Vogt, Leslie J et al. (2002) Effect of ethanol self-administration on mu- and delta-opioid receptor-mediated G-protein activity. Alcohol Clin Exp Res 26:688-94

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