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. 2023 Apr 25;42(4):112337.
doi: 10.1016/j.celrep.2023.112337. Epub 2023 Apr 11.

Ecdysone signaling determines lateral polarity and remodels neurites to form Drosophila's left-right brain asymmetry

So Sakamura  1 , Fu-Yu Hsu  2 , Akari Tsujita  1 , Mohammed Bin Abubaker  3 , Ann-Shyn Chiang  4 , Kenji Matsuno  5
Affiliations

Ecdysone signaling determines lateral polarity and remodels neurites to form Drosophila's left-right brain asymmetry

So Sakamura et al. Cell Rep. .

Abstract

Left-right (LR) asymmetry of the brain is fundamental to its higher-order functions. The Drosophila brain's asymmetrical body (AB) consists of a structural pair arborized from AB neurons and is larger on the right side than the left. We find that the AB initially forms LR symmetrically and then develops LR asymmetrically by neurite remodeling that is specific to the left AB and is dynamin dependent. Additionally, neuronal ecdysone signaling inhibition randomizes AB laterality, suggesting that ecdysone signaling determines AB's LR polarity. Given that AB's LR asymmetry relates to memory formation, our research establishes AB as a valuable model for studying LR asymmetry and higher-order brain function relationships.

Keywords: CP: Neuroscience; Drosophila; asymmetrical body; brain; ecdysone signaling; left-right asymmetry; neurite remodeling; pruning.

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Conflict of interest statement

Declaration of interests The authors declare no competing interests.

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