Epstein, J. M. | Search bioRxiv

bioRxiv2025

Respiratory exposure to inert particulate matter during pregnancy leads to oxidative stress and cardiac proteome remodeling

Withdrawal StatementThe authors have withdrawn this manuscript because upon peer review major revisions have been identified as needed to ensure that the conclusions are in par with the presented data. Current studies are ongoing to provide a more complete version of the manuscript for peer review publication. Therefore, the authors do not wish this work to be cited as reference for the project in its current form. If you have any questions, please contact the corresponding author.

molecular biology↗

bioRxiv2024

Serotonin acts through multiple cellular targets during an olfactory critical period.

Serotonin (5-HT) is known to modulate early development during critical periods when experience drives heightened levels of plasticity in neurons. Here, we take advantage of the genetically tractable olfactory system of Drosophila to investigate how 5-HT modulates critical period plasticity in the CO2 sensing circuit of fruit flies. Our study reveals that 5HT modulation of multiple neuronal targets is necessary for experience-dependent structural changes in an odor processing circuit. The olfactory CPP is known to involve local inhibitory networks and consistent with this we found that knocking down 5-HT7 receptors in a subset of GABAergic local interneurons was sufficient to block CPP, as was knocking down GABA receptors expressed by olfactory sensory neurons (OSNs). Additionally, direct modulation of OSNs via 5-HT2B expression in the cognate OSNs sensing CO2 is also essential for CPP. Furthermore, 5-HT1B expression by serotonergic neurons in the olfactory system is also required during the critical period. Our study reveals that 5-HT modulation of multiple neuronal targets is necessary for experience-dependent structural changes in an odor processing circuit.

neuroscience↗