Neuron type-specific expression of a mutant KRAS impairs hippocampal-dependent learning and memory
| Autor: | Kyoung Doo Hwang, Minkyung Kang, Sang Jeong Kim, Yongseok Lee, Han Byul Jang, Hyun Hee Ryu |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Adult
lcsh:Medicine Neurotransmission Hippocampal formation Biology Molecular neuroscience Inhibitory postsynaptic potential Hippocampus Article Learning and memory Proto-Oncogene Proteins p21(ras) Mice chemistry.chemical_compound Memory Intellectual Disability medicine Animals Humans Learning Picrotoxin GABAergic Neurons lcsh:Science Cells Cultured Multidisciplinary lcsh:R Long-term potentiation Disease Models Animal medicine.anatomical_structure nervous system chemistry Neurodevelopmental Disorders Organ Specificity Mutation Excitatory postsynaptic potential Diseases of the nervous system GABAergic lcsh:Q Neuron Neuroscience Signal Transduction |
| Zdroj: | Scientific Reports, Vol 10, Iss 1, Pp 1-13 (2020) Scientific Reports |
| ISSN: | 2045-2322 |
| Popis: | KRAS mutations are associated with rare cases of neurodevelopmental disorders that can cause intellectual disabilities. Previous studies showed that mice expressing a mutant KRAS have impaired the development and function of GABAergic inhibitory neurons, which may contribute to behavioural deficits in the mutant mice. However, the underlying cellular mechanisms and the role of excitatory neurons in these behavioural deficits in adults are not fully understood. Herein, we report that neuron type-specific expression of a constitutively active mutant KRASG12V in either excitatory or inhibitory neurons resulted in spatial memory deficits in adult mice. In inhibitory neurons, KRASG12V induced ERK activation and enhanced GABAergic synaptic transmission. Expressing KRASG12V in inhibitory neurons also impaired long-term potentiation in the hippocampal Shaffer-collateral pathway, which could be rescued by picrotoxin treatment. In contrast, KRASG12V induced ERK activation and neuronal cell death in excitatory neurons, which might have contributed to the severe behavioural deficits. Our results showed that both excitatory and inhibitory neurons are involved in mutant KRAS-associated learning deficits in adults via distinct cellular mechanisms. |
| Databáze: | OpenAIRE |
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