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Scala, Federico; Kobak, Dmitry; Bernabucci, Matteo; Bernaerts, Yves; Cadwell, Cathryn René; Castro, Jesus Ramon; Hartmanis, Leonard; Jiang, Xiaolong; Laturnus, Sophie; Miranda, Elanine; Mulherkar, Shalaka; Tan, Zheng Huan; Yao, Zizhen; Zeng, Hongkui; Sandberg, Rickard; Berens, Philipp; Tolias, Andreas S
Nature (London), 10/2021, Letnik: 598, Številka: 7879Journal Article
Cortical neurons exhibit extreme diversity in gene expression as well as in morphological and electrophysiological properties . Most existing neural taxonomies are based on either transcriptomic or morpho-electric criteria, as it has been technically challenging to study both aspects of neuronal diversity in the same set of cells . Here we used Patch-seq to combine patch-clamp recording, biocytin staining, and single-cell RNA sequencing of more than 1,300 neurons in adult mouse primary motor cortex, providing a morpho-electric annotation of almost all transcriptomically defined neural cell types. We found that, although broad families of transcriptomic types (those expressing Vip, Pvalb, Sst and so on) had distinct and essentially non-overlapping morpho-electric phenotypes, individual transcriptomic types within the same family were not well separated in the morpho-electric space. Instead, there was a continuum of variability in morphology and electrophysiology, with neighbouring transcriptomic cell types showing similar morpho-electric features, often without clear boundaries between them. Our results suggest that neuronal types in the neocortex do not always form discrete entities. Instead, neurons form a hierarchy that consists of distinct non-overlapping branches at the level of families, but can form continuous and correlated transcriptomic and morpho-electrical landscapes within families.
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in: SICRIS
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