4.8 Article

Distinct roles of astroglia and neurons in synaptic plasticity and memory

期刊

MOLECULAR PSYCHIATRY
卷 27, 期 2, 页码 873-885

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SPRINGERNATURE
DOI: 10.1038/s41380-021-01332-6

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资金

  1. National Natural Science Foundation of China [82090032, 31830033, 31600864]
  2. Program for Changjiang Scholars and Innovative Research Team in University [IRT_16R37]
  3. Key-Area Research and Development Program of Guangdong Province [2018B030334001, 2018B030340001]
  4. Science and Technology Program of Guangzhou [202007030013]
  5. Natural Science Foundation of Guangdong Province [2021A1515012181]
  6. Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence Fund [2019020]

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Through integrating synaptic inputs, astrocytic IP3 receptor type 2 (IP(3)R2)-dependent Ca2+ signaling is crucial for late-phase LTP, while neuron-derived BDNF is essential for both early and late-phase LTP. Dynamic differences in BDNF secretion play a role in modulating distinct forms of LTP, with astrocyte- and neuron-derived BDNF exhibiting different roles in memory. These findings enrich our understanding of LTP and memory at the cellular level, suggesting distinct roles of astrocytes and neurons in information integration.
Long-term potentiation (LTP) in the hippocampus is the most studied form of synaptic plasticity. Temporal integration of synaptic inputs is essential in synaptic plasticity and is assumed to be achieved through Ca2+ signaling in neurons and astroglia. However, whether these two cell types play different roles in LTP remain unknown. Here, we found that through the integration of synaptic inputs, astrocyte inositol triphosphate (IP3) receptor type 2 (IP(3)R2)-dependent Ca2+ signaling was critical for late-phase LTP (L-LTP) but not early-phase LTP (E-LTP). Moreover, this process was mediated by astrocyte-derived brain-derived neurotrophic factor (BDNF). In contrast, neuron-derived BDNF was critical for both E-LTP and L-LTP. Importantly, the dynamic differences in BDNF secretion play a role in modulating distinct forms of LTP. Moreover, astrocyte- and neuron-derived BDNF exhibited different roles in memory. These observations enriched our knowledge of LTP and memory at the cellular level and implied distinct roles of astrocytes and neurons in information integration.

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