Mind Bomb-2 Regulates Hippocampus-dependent Memory Formation and Synaptic Plasticity
Mind Bomb-2 Regulates Hippocampus-dependent Memory Formation and Synaptic Plasticity
- Somi Kim TaeHyun Kim Hye-Ryeon Lee Young-Yun Kong Bong-Kiun Kaang
- 대한생리학회-대한약리학회
- The Korean Journal of Physiology & Pharmacology
- 제19권 제6호
- 등재여부 : KCI등재
- 2015.01
- 515 - 522 (8 pages)
Notch signaling is a key regulator of neuronal fate during embryonic development, but its function in the adult brain is still largely unknown. Mind bomb-2 (Mib2) is an essential positive regulator of the Notch pathway, which acts in the Notch signal-sending cells. Therefore, genetic deletion of Mib2 in the mouse brain might help understand Notch signaling-mediated cell-cell interactions between neurons and their physiological function. Here we show that deletion of Mib2 in the mouse brain results in impaired hippocampal spatial memory and contextual fear memory. Accordingly, we found impaired hippocampal synaptic plasticity in Mib2 knock-out (KO) mice; however, basal synaptic transmission did not change at the Schaffer collateral-CA1 synapses. Using western blot analysis, we found that the level of cleaved Notch1 was lower in Mib2 KO mice than in wild type (WT) littermates after mild foot shock. Taken together, these data suggest that Mib2 plays a critical role in synaptic plasticity and spatial memory through the Notch signaling pathway.