miR-183 cluster scales mechanical pain sensitivity by regulating basal and neuropathic pain genes

C Peng, L Li, MD Zhang, C Bengtsson Gonzales… - Science, 2017 - science.org
C Peng, L Li, MD Zhang, C Bengtsson Gonzales, M Parisien, I Belfer, D Usoskin, H Abdo…
Science, 2017science.org
Nociception is protective and prevents tissue damage but can also facilitate chronic pain.
Whether a general principle governs these two types of pain is unknown. Here, we show that
both basal mechanical and neuropathic pain are controlled by the microRNA-183 (miR-183)
cluster in mice. This single cluster controls more than 80% of neuropathic pain–regulated
genes and scales basal mechanical sensitivity and mechanical allodynia by regulating
auxiliary voltage-gated calcium channel subunits α2δ-1 and α2δ-2. Basal sensitivity is …
Nociception is protective and prevents tissue damage but can also facilitate chronic pain. Whether a general principle governs these two types of pain is unknown. Here, we show that both basal mechanical and neuropathic pain are controlled by the microRNA-183 (miR-183) cluster in mice. This single cluster controls more than 80% of neuropathic pain–regulated genes and scales basal mechanical sensitivity and mechanical allodynia by regulating auxiliary voltage-gated calcium channel subunits α2δ-1 and α2δ-2. Basal sensitivity is controlled in nociceptors, and allodynia involves TrkB+ light-touch mechanoreceptors. These light-touch–sensitive neurons, which normally do not elicit pain, produce pain during neuropathy that is reversed by gabapentin. Thus, a single microRNA cluster continuously scales acute noxious mechanical sensitivity in nociceptive neurons and suppresses neuropathic pain transduction in a specific, light-touch–sensitive neuronal type recruited during mechanical allodynia.
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