Spatial transcriptomics reveals asymmetric cellular responses to injury in the regenerating spiny mouse (Acomys) ear

Author:

van Beijnum Henriëtte,Koopmans TimORCID,Tomasso AntonioORCID,Disela Vanessa,te Lindert Severin,Bakkers JeroenORCID,Alemany AnnaORCID,Berezikov EugeneORCID,Bartscherer KerstinORCID

Abstract

In contrast to other mammals, the spiny mouse (Acomys) regenerates skin and ear tissue, which includes hair follicles, glands, and cartilage, in a scar-free manner. Ear punch regeneration is asymmetric with only the proximal wound side participating in regeneration. Here, we show that cues originating from the proximal side are required for normal regeneration and use spatially resolved transcriptomics (tomo-seq) to understand the molecular and cellular events underlying this process. Analyzing gene expression across the ear and comparing expression modules between proximal and distal wound sides, we identify asymmetric gene expression patterns and pinpoint regenerative processes in space and time. Moreover, using a comparative approach with nonregenerative rodents (Mus,Meriones), we strengthen a hypothesis in which particularities in the injury-induced immune response may be one of the crucial determinants for why spiny mice regenerate whereas their relatives do not. Our data are available in SpinyMine, an easy-to-use and expandable web-based tool for exploringAcomysregeneration-associated gene expression.

Funder

German Research Foundation

European Research Council

Publisher

Cold Spring Harbor Laboratory

Subject

Genetics (clinical),Genetics

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