Alterations in circadian rhythm phase shifting ability in rats following ethanol exposure during the third trimester brain growth spurt

Alcoholism, Clinical and Experimental Research
Hiromi Sakata-HagaJennifer D Thomas

Abstract

Disruptions in sleep and feeding rhythms are among the consequences of prenatal alcohol exposure. Previously, we reported that ethanol exposure during the second trimester equivalent in rats produces long-lasting impairments in circadian system functioning. In the present study, we examined the effects of ethanol exposure during the third trimester equivalent brain growth spurt on the development of the circadian clock system. Sprague-Dawley male rat pups were exposed to 6.0 g/kg/d ethanol via an artificial rearing procedure on postnatal days (PD) 4 through 9 (EtOH). An artificially reared gastrostomized control group and a normally reared suckle control group were also included. At 10 to 12 weeks of age, wheel-running behavior was measured continuously under a 12-hour/12-hour light/dark (LD) cycle. Thereafter, subjects were exposed to a 6-hour phase delay of the LD cycle, and the ability to adjust to the new LD cycle was evaluated. Before the phase delay, onset time of activity and acrophases of activity in all 3 groups were not significantly different from one another. After the 6-hour LD cycle delay, EtOH subjects were slower to adapt to the new cycle compared with both control groups, as measured by both activity onset and ...Continue Reading

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Citations

Jun 18, 2010·CNS Neuroscience & Therapeutics·Trevor Archer
Jul 1, 2010·Alcoholism, Clinical and Experimental Research·Maria AgapitoDipak K Sarkar
Jul 3, 2009·The Journal of Toxicological Sciences·Yoshihiro Fukui, Hiromi Sakata-Haga
Oct 5, 2017·Biochemistry and Cell Biology = Biochimie Et Biologie Cellulaire·Ana Hanlon-DearmanHeather Carmichael Olson
Jun 1, 2018·Alcoholism, Clinical and Experimental Research·Sarah M Inkelis, Jennifer D Thomas

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