Microglial P2X4 receptors are essential for spinal neurons hyperexcitability and tactile allodynia in male and female neuropathic mice
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Microglial P2X4 receptors are essential for spinal neurons hyperexcitability and tactile allodynia in male and female neuropathic mice. / Gilabert, Damien; Duveau, Alexia; Carracedo, Sara; Linck, Nathalie; Langla, Adeline; Muramatsu, Rieko; Koch-Nolte, Friedrich; Rassendren, François; Grutter, Thomas; Fossat, Pascal; Boué-Grabot, Eric; Ulmann, Lauriane.
In: ISCIENCE, Vol. 26, No. 11, 17.11.2023, p. 108110.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Microglial P2X4 receptors are essential for spinal neurons hyperexcitability and tactile allodynia in male and female neuropathic mice
AU - Gilabert, Damien
AU - Duveau, Alexia
AU - Carracedo, Sara
AU - Linck, Nathalie
AU - Langla, Adeline
AU - Muramatsu, Rieko
AU - Koch-Nolte, Friedrich
AU - Rassendren, François
AU - Grutter, Thomas
AU - Fossat, Pascal
AU - Boué-Grabot, Eric
AU - Ulmann, Lauriane
N1 - © 2023 The Author(s).
PY - 2023/11/17
Y1 - 2023/11/17
N2 - In neuropathic pain, recent evidence has highlighted a sex-dependent role of the P2X4 receptor in spinal microglia in the development of tactile allodynia following nerve injury. Here, using internalization-defective P2X4mCherryIN knockin mice (P2X4KI), we demonstrate that increased cell surface expression of P2X4 induces hypersensitivity to mechanical stimulations and hyperexcitability in spinal cord neurons of both male and female naive mice. During neuropathy, both wild-type (WT) and P2X4KI mice of both sexes develop tactile allodynia accompanied by spinal neuron hyperexcitability. These responses are selectively associated with P2X4, as they are absent in global P2X4KO or myeloid-specific P2X4KO mice. We show that P2X4 is de novo expressed in reactive microglia in neuropathic WT and P2X4KI mice of both sexes and that tactile allodynia is relieved by pharmacological blockade of P2X4 or TrkB. These results show that the upregulation of P2X4 in microglia is crucial for neuropathic pain, regardless of sex.
AB - In neuropathic pain, recent evidence has highlighted a sex-dependent role of the P2X4 receptor in spinal microglia in the development of tactile allodynia following nerve injury. Here, using internalization-defective P2X4mCherryIN knockin mice (P2X4KI), we demonstrate that increased cell surface expression of P2X4 induces hypersensitivity to mechanical stimulations and hyperexcitability in spinal cord neurons of both male and female naive mice. During neuropathy, both wild-type (WT) and P2X4KI mice of both sexes develop tactile allodynia accompanied by spinal neuron hyperexcitability. These responses are selectively associated with P2X4, as they are absent in global P2X4KO or myeloid-specific P2X4KO mice. We show that P2X4 is de novo expressed in reactive microglia in neuropathic WT and P2X4KI mice of both sexes and that tactile allodynia is relieved by pharmacological blockade of P2X4 or TrkB. These results show that the upregulation of P2X4 in microglia is crucial for neuropathic pain, regardless of sex.
U2 - 10.1016/j.isci.2023.108110
DO - 10.1016/j.isci.2023.108110
M3 - SCORING: Journal article
C2 - 37860691
VL - 26
SP - 108110
JO - ISCIENCE
JF - ISCIENCE
SN - 2589-0042
IS - 11
ER -