Keratinocyte Piezo1 drives paclitaxel-induced mechanical hypersensitivity
Mikesell, A. R.; Isaeva, E.; Schulte, M. L.; Menzel, A. D.; Sriram, A.; Prahl, M. M.; Shin, S. M.; Sadler, K. E.; Yu, H. E.; Stucky, C. L.
Show abstract
Recent work demonstrates that epidermal keratinocytes are critical for normal touch sensation. However, it is unknown if keratinocytes contribute to touch evoked pain and hypersensitivity following tissue injury. Here, we used inhibitory optogenetic and chemogenetic techniques to determine the extent to which keratinocyte activity contributes to the severe neuropathic pain that accompanies chemotherapeutic treatment. We found that keratinocyte inhibition largely alleviates paclitaxel-induced mechanical hypersensitivity. Furthermore, we found that paclitaxel exposure sensitizes mouse and human keratinocytes to mechanical stimulation through the keratinocyte mechanotransducer Piezo1. These findings demonstrate the contribution of non-neuronal cutaneous cells to neuropathic pain and pave the way for the development of new pain-relief strategies that target epidermal keratinocytes and Piezo1. SummarySensitization of the keratinocyte mechanotransducer Piezo1 drives paclitaxel-induced touch pain.
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