Cell RepJClub
Cell-type specific and nanoscale control of hippocampal presynaptic homeostatic plasticity.
Cell Reports · · Journal Article · Open access
Chipman, Fetter + more
Abstract ↗AI summary
The abstract is read at the publisher; the summary is JClub's.
Presynaptic homeostatic plasticity in hippocampal circuits is target neuron-specific, robust at PV+ interneuron synapses but absent at SST+ interneurons.
- Why it matters: Homeostatic signaling must operate across diverse cell and synapse types, yet how it is implemented within complex brain circuitry is unclear.
- What they did: The study tested whether PHP depends on interneuron identity and whether it can be induced at adjacent synapses within single axonal boutons, separated by hundreds of nanometers, and assessed the role of Sema3A signaling.
- The result: PHP is differentially induced with nanoscale precision at synapses within single boutons, and these localized effects are eliminated without Sema3A, supporting a repression-and-local-de-repression model.
The findingWhy it mattersWhat they didThe result
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