Superior Place Learning of C57BL/6 vs. DBA/2 Mice Following Prior Cued Learning in the Water Maze Depends on Prefrontal Cortical Subregions
- 주제(키워드) task switching , CREB phosphorylation , place learning , cued learning , medial prefrontal cortex , orbitofrontal cortex , water maze
- 주제(기타) Behavioral Sciences
- 주제(기타) Neurosciences
- 설명문(일반) [Cho, Woo-Hyun; Park, Jung-Cheol; Han, Jung-Soo] Konkuk Univ, Dept Biol Sci, Seoul, South Korea; [Jeon, Won Kyung] KIOM, Herbal Med Res Div, Daejeon, South Korea; [Jeon, Won Kyung] Korea Inst Sci & Technol, Convergence Res Ctr Diag Treatment & Care Syst De, Seoul, South Korea; [Cho, Jeiwon] Catholic Kwandong Univ, Coll Med, Dept Med Sci, Int St Marys Hosp, Incheon, South Korea; [Cho, Jeiwon] Catholic Univ Korea, Incheon St Marys Hosp, Inst Biomed Convergence, Incheon, South Korea
- 등재 SCIE, SCOPUS
- 발행기관 FRONTIERS MEDIA SA
- 발행년도 2019
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000171973
- 본문언어 영어
- Published As https://dx.doi.org/10.3389/fnbeh.2019.00011
초록/요약
The participation of the prefrontal cortex (PFC), hippocampus, and dorsal striatum in switching the learning task from cued to place learning were examined in C57BL/6 and DBA/2 mice, by assessing changed levels of phosphorylated CREB (pCREB). Mice of both strains first received cued training in a water maze for 4 days (4 trials per day), and were then assigned to one of four groups, one with no place training, and three with different durations of place training (2, 4, or 8 days). Both strains showed equal performance in cued training. After the switch to place training, C57BL/6 mice with 2 or 4 days of training performed significantly better than DBA/2 mice, but their superiority disappeared during the second half of an 8 days-place training period. The pCREB levels of these mice were measured 30 min after place training and compared with those of mice that received only cued training. Changes in pCREB levels of C57BL/6 mice were greater in the hippocampal CA3, hippocampal dentate gyrus, orbitofrontal and medial PFC than those of DBA/2 mice, when mice of both received the switched place training for 2 days. We further investigated the roles of orbitofrontal and medial PFC among these brain regions showing strain differences, by destroying each region using selective neurotoxins. C57BL/6 mice with orbitofrontal lesions were slower to acquire the place learning and continued to use the cued search acquired during the cued training phase. These findings indicate that mouse orbitofrontal cortex (OFC) pCREB is associated with behavioral flexibility such as the ability to switch a learning task.
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