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Midazolam Exposure Impedes Oligodendrocyte Development via the Translocator Protein and Impairs Myelination in Larval Zebrafish
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Midazolam Exposure Impedes Oligodendrocyte Development via the Translocator Protein and Impairs Myelination in Larval Zebrafish
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Journal Article
Midazolam Exposure Impedes Oligodendrocyte Development via the Translocator Protein and Impairs Myelination in Larval Zebrafish
2022
Overview
Anesthetics are commonly used in various medical procedures. Accumulating evidence suggests that early-life anesthetics exposure in infants and children affects brain development, causing psychiatric and neurological disorders. However, the underlying mechanisms are poorly understood. Using zebrafish larvae as a model, we found that the proliferation and migration of oligodendrocyte progenitor cells (OPCs) were severely impaired by the exposure of midazolam (MDZ), an anesthetic widely used in pediatric surgery and intensive care medicine, leading to a reduction of oligodendroglial lineage cell in the dorsal spinal cord. This defect was mimicked by the bath application of translocator protein (TSPO) agonists and partially rescued by genetic downregulation of TSPO. Cell transplantation experiments showed that requirement of TSPO for MDZ-induced oligodendroglial lineage cell defects is cell-autonomous. Furthermore, transmission electron microscopy and in vivo electrophysiological recording experiments demonstrated that MDZ exposure caused axon hypomyelination and action potential propagation retardation, resulting in delayed behavior initiation. Thus, our findings reveal that MDZ affects oligodendroglial lineage cell development and myelination in young animals, raising the care about its clinic use in infants and children.
Publisher
Springer US,Springer Nature B.V
Subject
/ Anesthetics, Intravenous - pharmacology
/ Animals
/ Biomedical and Life Sciences
/ Cell Differentiation - drug effects
/ Cell Differentiation - physiology
/ Children
/ Electrophysiological recording
/ Embryos
/ Ethanol
/ Infants
/ Oligodendrocyte Precursor Cells - drug effects
/ Oligodendrocyte Precursor Cells - metabolism
/ Oligodendroglia - drug effects
/ Oligodendroglia - metabolism
/ Proteins
/ Receptors, GABA - metabolism
/ Transmission electron microscopy
