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- W2541434109 abstract "Chemotherapy-induced peripheral neuropathy (CIPN), characterized by pain and numbness in hands and feet, is a common side effect of cancer treatment. In most patients, symptoms of CIPN subside after treatment completion. However, in a substantial subgroup, CIPN persists long into survivorship. Impairment in pain resolution pathways may explain persistent CIPN. We investigated the contribution of T cells and endogenous interleukin (IL)-10 to resolution of CIPN. Paclitaxel-induced mechanical allodynia was prolonged in T-cell-deficient (Rag1-/-) mice compared with wild-type (WT) mice. There were no differences between WT and Rag1-/- mice in severity of paclitaxel-induced mechanical allodynia. Adoptive transfer of either CD3+ or CD8+, but not CD4+, T cells to Rag1-/- mice normalized resolution of CIPN. Paclitaxel treatment increased the number of T cells in lumbar dorsal root ganglia (DRG), where CD8+ T cells were the major subset. Inhibition of endogenous IL-10 signaling by intrathecal injection of anti-IL-10 to WT mice or Rag1-/- mice reconstituted with CD8+ T cells delayed recovery from paclitaxel-induced mechanical allodynia. Recovery was also delayed in IL-10 knock-out mice. Conversely, administration of exogenous IL-10 attenuated paclitaxel-induced allodynia. In vitro, IL-10 suppressed abnormal paclitaxel-induced spontaneous discharges in DRG neurons. Paclitaxel increased DRG IL-10 receptor expression and this effect requires CD8+ T cells. In conclusion, we identified a novel mechanism for resolution of CIPN that requires CD8+ T cells and endogenous IL-10. We propose that CD8+ T cells increase DRG IL-10 receptor expression and that IL-10 suppresses the abnormal paclitaxel-induced spontaneous discharges by DRG neurons to promote recovery from CIPN.Chemotherapy-induced peripheral neuropathy persists after completion of cancer treatment in a significant subset of patients, whereas others recover. Persistent neuropathy after completion of cancer treatment severely affects quality of life. We propose that understanding how neuropathy resolves will identify novel avenues for treatment. We identified a novel and critical role for CD8+ T cells and for endogenous IL-10 in recovery from paclitaxel-induced neuropathy in mice. Enhancing the capacity of CD8+ T cells to promote resolution or increasing IL-10 signaling are promising targets for novel interventions. Clinically, peripheral blood CD8+ T-cell function and/or the capacity of individuals to produce IL-10 may represent biomarkers of risk for developing persistent peripheral neuropathy after completion of cancer treatment." @default.
- W2541434109 created "2016-11-04" @default.
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- W2541434109 date "2016-10-26" @default.
- W2541434109 modified "2023-10-11" @default.
- W2541434109 title "CD8<sup>+</sup>T Cells and Endogenous IL-10 Are Required for Resolution of Chemotherapy-Induced Neuropathic Pain" @default.
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- W2541434109 doi "https://doi.org/10.1523/jneurosci.3708-15.2016" @default.
- W2541434109 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5098842" @default.
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