Cyclin-dependent-like kinase 5 is required for pain signalling in both human neurons and mouse models
La Montanara, P.; Hervera Abad, A.; Baltussen, L.; Palmisano, I.; De Virgiliis, F.; Gao, Y.; Qasim, K.; Gorgoraptis, N.; Wong, K.; Downs, J.; Di Lazzaro, V.; Pizzorusso, T.; Ultanir, S.; Leonard, H.; Nagy, I.; Mazarakis, N.; Di Giovanni, S.
Show abstract
Cyclin-dependent-like kinase 5 (Cdkl5) gene mutations lead to an X-linked disorder that is characterized by infantile epileptic encephalopathy, developmental delay and hypotonia. However, we found that a substantial percentage of these patients also report a previously unrecognised anamnestic deficiency in pain perception. Consistent with a role in nociception, we discovered that Cdkl5 is expressed selectively in nociceptive dorsal root ganglia (DRG) neurons in mice and in iPS-derived human nociceptors. CDKL5 deficient mice display defective epidermal innervation and conditional deletion of Cdkl5 in DRG sensory neurons significantly impairs nociception, phenocopying CDKL5 deficiency disorder in patients. Mechanistically, Cdkl5 interacts with CaMKII to control outgrowth as well as TRPV1-dependent signalling, which are disrupted in both Cdkl5 mutant murine DRG and human iPS-derived nociceptors. Together, these findings unveil a previously unrecognized role for Cdkl5 in nociception, proposing an original regulatory mechanism for pain perception with implications for future therapeutics in CDKL5 deficiency disorder.\n\nOne Sentence SummaryCyclin-dependent-like kinase 5 (Cdkl5) controls nociception in patients and murine models of Cdkl5 deficiency disorder via CaMKII-dependent mechanisms
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