Comparative connectomics of Drosophila descending and ascending neurons

• 成果类型: Article
• 署名作者: Sturner, Tomke; Brooks, Paul; Serratosa Capdevila, Laia; Morris, Billy J.; Javier, Alexandre; Fang, Siqi; Gkantia, Marina; Cachero, Sebastian; Beckett, Isabella R.; Marin, Elizabeth C.; Schlegel, Philipp; Champion, Andrew S.; Moitra, Ilina; Richards, Alana; Klemm, Finja; Kugel, Leonie; Namiki, Shigehiro; Cheong, Han S. J.; Kovalyak, Julie; Tenshaw, Emily; Parekh, Ruchi; Phelps, Jasper S.; Mark, Brandon; Dorkenwald, Sven; Bates, Alexander S.; Matsliah, Arie; Yu, Szi-chieh; Mckellar, Claire E.; Sterling, Amy; Seung, H. Sebastian; Murthy, Mala; Tuthill, John C.; Lee, Wei-Chung Allen; Card, Gwyneth M.; Costa, Marta; Jefferis, Gregory S. X. E.; Eichler, Katharina
• 署名单位: MRC Laboratory Molecular Biology; University of Cambridge; Leipzig University; University of Tokyo; Howard Hughes Medical Institute; Columbia University; Harvard University; Harvard Medical School; Swiss Federal Institutes of Technology Domain; Ecole Polytechnique Federale de Lausanne; University of Washington; University of Washington Seattle; Princeton University; Princeton University; University of Oxford; Harvard University; Harvard University Medical Affiliates; Boston Children's Hospital
• 刊物名称: Nature
• ISSN/ISSBN: 0028-3317
• DOI: 10.1038/s41586-025-08925-z
• 发表日期: 2025-07-03
• 关键词: systematic nomenclature; male courtship; BEHAVIOR; melanogaster; rejection; circuits; motion; brain

摘要

In most complex nervous systems there is a clear anatomical separation between the nerve cord, which contains most of the final motor outputs necessary for behaviour, and the brain. In insects, the neck connective is both a physical and an information bottleneck connecting the brain and the ventral nerve cord (an analogue of the spinal cord) and comprises diverse populations of descending neurons (DNs), ascending neurons (ANs) and sensory ascending neurons, which are crucial for sensorimotor signalling and control. Here, by integrating three separate electron microscopy (EM) datasets(1,2,3,4), we provide a complete connectomic description of the ANs and DNs of the Drosophila female nervous system and compare them with neurons of the male nerve cord. Proofread neuronal reconstructions are matched across hemispheres, datasets and sexes. Crucially, we also match 51% of DN cell types to light-level data(5) defining specific driver lines, as well as classifying all ascending populations. We use these results to reveal the anatomical and circuit logic of neck connective neurons. We observe connected chains of DNs and ANs spanning the neck, which may subserve motor sequences. We provide a complete description of sexually dimorphic DN and AN populations, with detailed analyses of selected circuits for reproductive behaviours, including male courtship(6) (DNa12; also known as aSP22) and song production(7) (AN neurons from hemilineage 08B) and female ovipositor extrusion(8) (DNp13). Our work provides EM-level circuit analyses that span the entire central nervous system of an adult animal.