Three-dimensional chromatin mapping of sensory neurons reveals that cohesin-dependent genomic domains are required for axonal regeneration
Palmisano, I.; Liu, T.; Gao, W.; Zhou, L.; Merkenschlager, M.; Muller, F.; Chadwick, J.; Toscano Rivolta, R.; Kong, G.; WD King, J.; Al-jibury, E.; Yan, Y.; Carlino, A.; Collison, B.; De Vitis, E.; Gongala, S.; De Virgiliis, F.; Wang, Z.; Di Giovanni, S.
Show abstract
The in vivo three-dimensional genomic architecture of adult mature neurons at homeostasis and after medically relevant perturbations such as axonal injury remains elusive. Here we address this knowledge gap by mapping the three-dimensional chromatin architecture and gene expression programme at homeostasis and after sciatic nerve injury in wild-type and cohesin-deficient mouse sensory dorsal root ganglia neurons via combinatorial Hi-C and RNA-seq. We find that cohesin is required for the full induction of the regenerative transcriptional program, by organising 3D genomic domains required for the activation of regenerative genes. Importantly, loss of cohesin results in disruption of chromatin architecture at regenerative genes and severely impaired nerve regeneration. Together, these data provide an original three-dimensional chromatin map of adult sensory neurons in vivo and demonstrate a role for cohesin-dependent chromatin interactions in neuronal regeneration.
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