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  • Title: Oral Accutane (13-cis-retinoic acid) has no effects on spatial learning and memory in male and female Sprague-Dawley rats.
    Author: Ferguson SA, Berry KJ.
    Journal: Neurotoxicol Teratol; 2007; 29(2):219-27. PubMed ID: 17161936.
    Abstract:
    Descriptions of psychiatric effects with Accutane (13-cis-retinoic acid (13-cis-RA)) use prompted a series of studies in a rodent model to ascertain its cognitive effects. Previously, we reported no effects on measures of anhedonia and depression in rats treated with 7.5, 22.5, or 30 mg/kg 13-cis-RA [S.A. Ferguson, F.J. Cisneros, B. Gough, J.P. Hanig, K.J. Berry, Chronic oral treatment with 13-cis-retinoic acid (isotretinoin) or all-trans-retinoic acid does not alter depression-like behaviors in rats, Toxicol. Sci. 87 (2005) 451-459 [16]; S.A. Ferguson, F.J., Cisneros, J.P. Hanig, K.J. Berry, Chronic oral treatment with Accutane (13-cis-retinoic acid) does not increase measures of anhedonia or depression in male and female Sprague-Dawley rats, (in preparation) [19]]. Here, we assessed spatial learning and memory in male and female Sprague-Dawley rats gavaged daily beginning on postnatal day (PND) 59 with vehicle control (soybean oil), 7.5 or 30 mg/kg of 13-cis-RA. We have reported that 7.5 mg/kg produces serum levels of 13-cis-RA comparable to those of humans prescribed Accutane [S.A. Ferguson, P.H. Siitonen, F.J. Cisneros, B. Gough, J.F. Young, Steady state pharmacokinetics of oral treatment with 13-cis-retinoic acid or all- trans-retinoic acid in male and female adult rats, Basic Clin. Pharmacol. Toxicol. 98 (2006) 582-587 [18]]. Three behavioral tasks assessed spatial learning and memory after chronic 13-cis-RA treatment: the escape-reinforced Morris water maze (PNDs 111-115), the food-reinforced 8-arm radial maze (PNDs 132-136), and the water-reinforced NCTR complex maze (PNDs 153-157). Behaviors were measured after a minimum of 52 and maximum of 94 days of 13-cis-RA treatment. 13-cis-RA treatment had no effects on performance of the 8-arm radial maze or the NCTR complex maze. Treatment effects on Morris water maze performance were negligible and neither dose-related nor consistent. Performances of the control group were quite similar to those previously described in this laboratory. These results indicate that chronic 13-cis-RA treatment in male and female rats has few effects on measures of spatial learning and memory.
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