Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

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Olive, M.F. et al.

Olive, Mehmert, Koenig, Camarini, Kim, Nannini, Ou, Hodge,

A role for corticotropin releasing factor ( CRF) in ethanol consumption, sensitivity, and reward as revealed by CRF-deficient mice.

RATIONALE: Corticotropin-releasing factor ( CRF) plays an integral role in mediating stress responses and anxiety. However, little is known regarding the role of CRF in ethanol consumption, a behavior often associated with stress and anxiety in humans. OBJECTIVE: The present study sought to determine the role of CRF in ethanol consumption, locomotor sensitivity and reward by examining these behaviors in C57BL/6J x 129S mice with a targeted disruption in the gene encoding the CRF prohormone. METHODS: Male wild-type and CRF-deficient mice were given concurrent access to ethanol and water in both limited and unlimited-access two-bottle choice paradigms. Taste reactivity (saccharin or quinine vs water) was examined in a similar manner under continuous-access conditions. Blood ethanol levels and clearance were measured following limited ethanol access as well as a 4-g/kg i.p. injection of ethanol. Locomotor stimulant effects of ethanol were measured in an open-field testing chamber, and the rewarding effects of ethanol were examined using the conditioned place preference paradigm. RESULTS: CRF-deficient mice displayed normal body weight, total fluid intake, taste reactivity and blood ethanol clearance, but consumed approximately twice as much ethanol as wild types in both continuous- and limited-access paradigms. CRF-deficient mice failed to demonstrate a locomotor stimulant effect following acute administration of ethanol (2 g/kg i.p.), and also failed to demonstrate a conditioned place preference to ethanol at 2 g/kg i.p., but did display such a preference at 3 g/kg i.p. CONCLUSIONS: CRF deficiency may lead to excessive ethanol consumption by reducing sensitivity to the locomotor stimulant and rewarding effects of ethanol.[1]

References

A role for corticotropin releasing factor (CRF) in ethanol consumption, sensitivity, and reward as revealed by CRF-deficient mice. Olive, M.F., Mehmert, K.K., Koenig, H.N., Camarini, R., Kim, J.A., Nannini, M.A., Ou, C.J., Hodge, C.W. Psychopharmacology (Berl.) (2003) [Pubmed]

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