ArticlebioRxiv : the preprint server for biology2024
Deficiency in transmitter release triggers homeostatic transcriptional changes that increase presynaptic excitability.
Article in bioRxiv : the preprint server for biology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Weakening of synaptic transmission at the Drosophila larval neuromuscular junction triggers two forms of homeostatic compensation, one that increases the probability of glutamate release per action potential (Pr) and another that increases motoneuron (MN) activity. We investigated the molecular changes in MNs that underlie the increase in MN activity. RNA-seq analysis on MNs whose glutamate release is weakened by knockdown of components of the MN transmitter release machinery reveals a reduction in expression of a group of genes that encode potassium channels and their positive modulators. These results identify a mechanism of compensation for weakened synaptic transmission by MNs, which engages a transcriptional program in those cells to increase firing and, thereby, ensure sufficient locomotory drive.
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