1. miR - 218 - 2 regulates cognitive functions in the hippocampus through complement component 3-dependent modulation of synaptic vesicle release.
- Author
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Lu SY, Fu CL, Liang L, Yang B, Shen W, Wang QW, Chen Y, Chen YF, Liu YN, Zhu L, Zhao J, Shi W, Mi S, and Yao J
- Subjects
- 3' Untranslated Regions, Animals, Cells, Cultured, Complement C3 metabolism, Exocytosis, Hippocampus cytology, Hippocampus physiology, Mice, Mice, Inbred C57BL, MicroRNAs genetics, Neurons metabolism, Neurons physiology, Complement C3 genetics, Hippocampus metabolism, Long-Term Potentiation, MicroRNAs metabolism, Synaptic Vesicles metabolism
- Abstract
microRNA-218 (miR-218) has been linked to several cognition related neurodegenerative and neuropsychiatric disorders. However, whether miR-218 plays a direct role in cognitive functions remains unknown. Here, using the miR-218 knockout (KO) mouse model and the sponge/overexpression approaches, we showed that miR - 218 - 2 but not miR - 218 - 1 could bidirectionally regulate the contextual and spatial memory in the mice. Furthermore, miR - 218 - 2 deficiency induced deficits in the morphology and presynaptic neurotransmitter release in the hippocampus to impair the long term potentiation. Combining the RNA sequencing analysis and luciferase reporter assay, we identified complement component 3 (C3) as a main target gene of miR-218 in the hippocampus to regulate the presynaptic functions. Finally, we showed that restoring the C3 activity in the miR - 218 - 2 KO mice could rescue the synaptic and learning deficits. Therefore, miR - 218 - 2 played an important role in the cognitive functions of mice through C3, which can be a mechanism for the defective cognition of miR-218 related neuronal disorders., Competing Interests: The authors declare no competing interest.
- Published
- 2021
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