Premium
Transcription factor MafB contributes to the activation of spinal microglia underlying neuropathic pain development
Author(s) -
TozakiSaitoh Hidetoshi,
Masuda Junya,
Kawada Ryu,
Kojima Chinami,
Yoneda Sosuke,
Masuda Takahiro,
Inoue Kazuhide,
Tsuda Makoto
Publication year - 2019
Publication title -
glia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.954
H-Index - 164
eISSN - 1098-1136
pISSN - 0894-1491
DOI - 10.1002/glia.23570
Subject(s) - microglia , neuropathic pain , neuroscience , transcription factor , neuroinflammation , central nervous system , biology , nociception , spinal cord , nerve injury , medicine , conditional gene knockout , immunology , inflammation , phenotype , receptor , biochemistry , gene
Microglia, which are pathological effectors and amplifiers in the central nervous system, undergo various forms of activation. A well‐studied microglial‐induced pathological paradigm, spinal microglial activation following peripheral nerve injury (PNI), is a key event for the development of neuropathic pain but the transcription factors contributing to microglial activation are less understood. Herein, we demonstrate that MafB, a dominant transcriptional regulator of mature microglia, is involved in the pathology of a mouse model of neuropathic pain. PNI caused a rapid and marked increase of MafB expression selectively in spinal microglia but not in neurons. We also found that the microRNA mir‐152 in the spinal cord which targets MafB expression decreased after PNI, and intrathecal administration of mir‐152 mimic suppressed the development of neuropathic pain. Reduced MafB expression using heterozygous Mafb deficient mice and by intrathecal administration of siRNA alleviated the development of PNI‐induced mechanical hypersensitivity. Furthermore, we found that intrathecal transfer of Mafb deficient microglia did not induce mechanical hypersensitivity and that conditional Mafb knockout mice did not develop neuropathic pain after PNI. We propose that MafB is a key mediator of the PNI‐induced phenotypic alteration of spinal microglia and neuropathic pain development.