RT Journal Article SR Electronic T1 A high-resolution transcriptomic and spatial atlas of cell types in the whole mouse brain JF bioRxiv FD Cold Spring Harbor Laboratory SP 2023.03.06.531121 DO 10.1101/2023.03.06.531121 A1 Zizhen Yao A1 Cindy T. J. van Velthoven A1 Michael Kunst A1 Meng Zhang A1 Delissa McMillen A1 Changkyu Lee A1 Won Jung A1 Jeff Goldy A1 Aliya Abdelhak A1 Pamela Baker A1 Eliza Barkan A1 Darren Bertagnolli A1 Jazmin Campos A1 Daniel Carey A1 Tamara Casper A1 Anish Bhaswanth Chakka A1 Rushil Chakrabarty A1 Sakshi Chavan A1 Min Chen A1 Michael Clark A1 Jennie Close A1 Kirsten Crichton A1 Scott Daniel A1 Tim Dolbeare A1 Lauren Ellingwood A1 James Gee A1 Alexandra Glandon A1 Jessica Gloe A1 Joshua Gould A1 James Gray A1 Nathan Guilford A1 Junitta Guzman A1 Daniel Hirschstein A1 Windy Ho A1 Kelly Jin A1 Matthew Kroll A1 Kanan Lathia A1 Arielle Leon A1 Brian Long A1 Zoe Maltzer A1 Naomi Martin A1 Rachel McCue A1 Emma Meyerdierks A1 Thuc Nghi Nguyen A1 Trangthanh Pham A1 Christine Rimorin A1 Augustin Ruiz A1 Nadiya Shapovalova A1 Cliff Slaughterbeck A1 Josef Sulc A1 Michael Tieu A1 Amy Torkelson A1 Herman Tung A1 Nasmil Valera Cuevas A1 Katherine Wadhwani A1 Katelyn Ward A1 Boaz Levi A1 Colin Farrell A1 Carol L. Thompson A1 Shoaib Mufti A1 Chelsea M. Pagan A1 Lauren Kruse A1 Nick Dee A1 Susan M. Sunkin A1 Luke Esposito A1 Michael J. Hawrylycz A1 Jack Waters A1 Lydia Ng A1 Kimberly A. Smith A1 Bosiljka Tasic A1 Xiaowei Zhuang A1 Hongkui Zeng YR 2023 UL http://biorxiv.org/content/early/2023/03/06/2023.03.06.531121.abstract AB The mammalian brain is composed of millions to billions of cells that are organized into numerous cell types with specific spatial distribution patterns and structural and functional properties. An essential step towards understanding brain function is to obtain a parts list, i.e., a catalog of cell types, of the brain. Here, we report a comprehensive and high-resolution transcriptomic and spatial cell type atlas for the whole adult mouse brain. The cell type atlas was created based on the combination of two single-cell-level, whole-brain-scale datasets: a single- cell RNA-sequencing (scRNA-seq) dataset of ∼7 million cells profiled, and a spatially resolved transcriptomic dataset of ∼4.3 million cells using MERFISH. The atlas is hierarchically organized into five nested levels of classification: 7 divisions, 32 classes, 306 subclasses, 1,045 supertypes and 5,200 clusters. We systematically analyzed the neuronal, non-neuronal, and immature neuronal cell types across the brain and identified a high degree of correspondence between transcriptomic identity and spatial specificity for each cell type. The results reveal unique features of cell type organization in different brain regions, in particular, a dichotomy between the dorsal and ventral parts of the brain: the dorsal part contains relatively fewer yet highly divergent neuronal types, whereas the ventral part contains more numerous neuronal types that are more closely related to each other. We also systematically characterized cell-type specific expression of neurotransmitters, neuropeptides, and transcription factors. The study uncovered extraordinary diversity and heterogeneity in neurotransmitter and neuropeptide expression and co-expression patterns in different cell types across the brain, suggesting they mediate a myriad of modes of intercellular communications. Finally, we found that transcription factors are major determinants of cell type classification in the adult mouse brain and identified a combinatorial transcription factor code that defines cell types across all parts of the brain. The whole-mouse-brain transcriptomic and spatial cell type atlas establishes a benchmark reference atlas and a foundational resource for deep and integrative investigations of cell type and circuit function, development, and evolution of the mammalian brain.Competing Interest StatementX.Z. is a co-founder and consultant of Vizgen.