Review Article
Circadian Regulation of Hippocampal-Dependent Memory: Circuits, Synapses, and Molecular Mechanisms
Table 2
Memory-related cellular signaling proteins or second messengers found to exhibit rhythmic expression or activity in the hippocampus.
| Protein | Region | Method | Phase (peak/nadir) | Model | Reference |
| cAMP | Whole hippocampus | ELISA | Day (8/20) | C57BL/6 mice | Eckel-Mahan et al. [18] | cAMP | Whole hippocampus | ELISA | Day (4/16) | C57BL/6 mice | Wardlaw et al. [103] | K-Ras | CA1 membrane rafts | Western | Night (16/4) | C57BL/6 mice | Shimizu et al. [42] | 4EBP1 | Whole hippocampus | Western | Day (4/16) | C57BL/6 mice | Saraf et al. [132] | Akt | Whole hippocampus | Western | Day (4/16) | C57BL/6 mice | Saraf et al. [132] | CREB | Whole hippocampus | Western | Day (4/16) | C57BL/6 mice | Eckel-Mahan et al. [18] | CREB | Whole hippocampus | Western | Day (2/18) | C3H/HeN mice | Rawashdeh et al. [55] | eIF4E | Whole hippocampus | Western | Day (4/16) | C57BL/6 mice | Saraf et al. [132] | ERK | CA1 | IHC | Day (4/16) | C57BL/6 mice | Phan et al. [100] | ERK | Whole hippocampus | Western | Day (2/14) | C3H/HeN mice | Rawashdeh et al. [55] | ERK | Whole hippocampus | Western | Day (4/16) | C57BL/6 mice | Wardlaw et al. [103] | ERK | CA1 | IHC | Night (16/4) | C57BL/6 mice | Shimizu et al. [42] | ERK | Whole hippocampus | Western | Day (4/16) | C57BL/6 mice | Eckel-Mahan et al. [18] | GSK3β | CA1 | Western | Day (9/17) | C57BL/6 mice | Besing et al. [43] | mTOR | Whole hippocampus | Western | Day (4/16) | C57BL/6 mice | Saraf et al. [132] | S6 | Whole hippocampus | Western | Day (4/16) | C57BL/6 mice | Saraf et al. [132] | Ras-GTP | Whole hippocampus | Western | Day (8/20) | C57BL/6 mice | Eckel-Mahan et al. [18] | SCOP | CA1 membrane rafts | Western | Night (16/4) | C57BL/6 mice | Shimizu et al. [42] |
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