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Regulatory T-cells inhibit microglia-induced pain hypersensitivity in female mice

ABSTRACT: Regulatory T-cells inhibit microglia-induced pain hypersensitivity in female mice

PROVIDER: PRJNA766536 | ENA |

REPOSITORIES: ENA

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Regulatory T-cells inhibit microglia-induced pain hypersensitivity in female mice [exp1]

Project description:Regulatory T-cells inhibit microglia-induced pain hypersensitivity in female mice [exp1]

| PRJNA766540 | ENA

Regulatory T-cells inhibit microglia-induced pain hypersensitivity in female mice [exp2]

Project description:Regulatory T-cells inhibit microglia-induced pain hypersensitivity in female mice [exp2]

| PRJNA766541 | ENA

Regulatory T-cells inhibit microglia-induced pain hypersensitivity in female mice [exp1]

Project description:RNA-sequencing data of male and female lumbar dorsal horn spinal cord microglia after 3 days of CSF1 or saline i.t. injection.

2021-09-27 | GSE184799 | GEO

Regulatory T-cells inhibit microglia-induced pain hypersensitivity in female mice [exp2]

Project description:RNA-sequencing data of female lumbar dorsal horn spinal cord microglia from WT or Treg KO mice after 3 days of CSF1 i.t. injection.

2021-09-27 | GSE184800 | GEO

4E-BP1-dependent translation in microglia controls mechanical hypersensitivity

Project description:Spinal microglia play a pivotal role in the development of neuropathic pain. Peripheral nerve injury induces changes in the transcriptional profile of microglia, including increased expression of components of translational machinery. Whether microglial protein synthesis is stimulated following nerve injury and has a functional role in mediating pain hypersensitivity is unknown. Here, we show that nascent protein synthesis is upregulated in spinal microglia following peripheral nerve injury. Stimulating mRNA translation in microglia, via selective ablation of the translational repressor, eukaryotic initiation factor 4E-binding protein 1 (4E-BP1), promoted the transition of microglia to a reactive state and induced mechanical hypersensitivity. Conversely, inhibiting microglial translation by expressing mutant 4E-BP1 in microglia attenuated their peripheral nerve injury-induced activation and alleviated neuropathic pain. Thus, the stimulation of 4E-BP1-dependent translation promotes microglia reactivity and mechanical hypersensitivity, whereas its inhibition alleviates neuropathic pain.

2024-01-31 | GSE254472 | GEO

Regulatory T-cells inhibit microglia-induced pain hypersensitivity in female mice.

Project description:Peripheral nerve injury-induced neuropathic pain is a chronic and debilitating condition characterized by mechanical hypersensitivity. We previously identified microglial activation via release of colony-stimulating factor 1 (CSF1) from injured sensory neurons as a mechanism contributing to nerve injury-induced pain. Here, we show that intrathecal administration of CSF1, even in the absence of injury, is sufficient to induce pain behavior, but only in male mice. Transcriptional profiling and morphologic analyses after intrathecal CSF1 showed robust immune activation in male but not female microglia. CSF1 also induced marked expansion of lymphocytes within the spinal cord meninges, with preferential expansion of regulatory T-cells (Tregs) in female mice. Consistent with the hypothesis that Tregs actively suppress microglial activation in females, Treg deficient (Foxp3DTR) female mice showed increased CSF1-induced microglial activation and pain hypersensitivity equivalent to males. We conclude that sexual dimorphism in the contribution of microglia to pain results from Treg-mediated suppression of microglial activation and pain hypersensitivity in female mice.

| S-EPMC8639143 | biostudies-literature

Regulatory T-cells inhibit microglia-induced pain hypersensitivity in female mice

Project description:This SuperSeries is composed of the SubSeries listed below.

2021-09-27 | GSE184801 | GEO

Translational control in the spinal cord regulates gene expression and pain hypersensitivity in the chronic phase of neuropathic pain

Project description:Sensitization of spinal nociceptive circuits plays a cardinal role in neuropathic pain. This sensitization depends on new gene expression that is primarily regulated via transcriptional and translational control mechanisms. The relative roles of these mechanisms in regulating gene expression in the clinically relevant chronic phase of neuropathic pain are not well understood. Here, we show that changes in gene expression in the spinal cord during the chronic phase of neuropathic pain are substantially regulated at the translational level. Downregulating spinal translation at the chronic phase alleviated pain hypersensitivity. Cell-type-specific profiling revealed that spinal inhibitory neurons exhibited greater changes in translation after peripheral nerve injury compared to excitatory neurons. Notably, increasing translation selectively in all inhibitory neurons or parvalbumin-positive (PV + ) interneurons, but not excitatory neurons, promoted mechanical pain hypersensitivity. Furthermore, increasing translation in PV + neurons decreased their intrinsic excitability and spiking activity, whereas reducing translation in spinal PV + neurons prevented the nerve injury-induced decrease in excitability. Thus, translational control mechanisms in the spinal cord, primarily in inhibitory neurons, play a critical role in mediating neuropathic pain hypersensitivity.

2024-04-30 | GSE265957 | GEO

Single-cell RNA sequencing reveals time- and sex-specific responses of spinal cord microglia to peripheral nerve injury and links ApoE to neuropathic pain

Project description:Activation of microglia in the spinal cord following peripheral nerve injury is critical for the development of long-lasting pain hypersensitivity. However, it remains unknown whether distinct microglia subpopulations or states contribute to different stages of pain development and maintenance. Here, we demonstrate, using single-cell RNA-sequencing, that microglia transcriptional states differ at early and late time points following nerve injury. Male microglia show more proliferation and distinct transcriptional changes in response to nerve injury comparing to females. Apolipoprotein E (Apoe) was the top upregulated gene in microglia at chronic time points after nerve injury in mice and polymorphisms in the APOE in humans are associated with chronic pain. Single-cell analysis of human spinal cord microglia reveals a subpopulation with a disease-related transcriptional signature. Our data provide a detailed analysis of transcriptional states of mouse and human spinal cord microglia and identify a previously unrecognized role for ApoE in neuropathic pain.

2020-12-07 | GSE162807 | GEO

Sex-specific transcriptome of spinal microglia in neuropathic pain due to peripheral nerve injury

Project description:Neuropathic pain is a prevalent and debilitating chronic disease that is characterized by activation in glial cells in various pain-related regions within the central nervous system. Recent studies have suggested a sexually dimorphic role of microglia in the maintenance of neuropathic pain in rodents. Here, we utilized RNA sequencing analysis of microglia to identify whether there is a common neuropathic microglial signature and characterize the sex differences in microglia in pain-related regions in nerve injury and chemotherapy-induced peripheral neuropathy mouse models. Whilst mechanical allodynia and behavioral changes were observed in all models, transcriptomic analysis of microglia revealed no common transcriptional changes in spinal and supraspinal regions and in different neuropathic models. However, there was a substantial change in microglial gene expression within the ipsilateral lumbar spinal cord 7-days after chronic constriction injury (CCI) of the sciatic nerve. Both sexes upregulated genes associated with inflammation, phagosome, and lysosome activation, though males revealed a prominent global transcriptional shift not observed in female mice. This study demonstrates a lack of a common neuropathic microglial signature and indicates distinct sex differences in spinal microglia, suggesting they contribute to the sex-specific pain processing following nerve injury.

2021-07-27 | GSE180627 | GEO

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