ABSTRACT: To address the differential response of the CNS, proteomics was applied in experimental autoimmune encephalomyelitis (EAE) mice and cuprizone (CPZ) mice in two different CNS regions
Project description:We have performed transcriptomic analysis in the spinal cord of experimental autoimmune encephalomyelitis (EAE) mice compared to naive mice at different time intervals in order to observe the gene expression changes within the CNS compartment
Project description:Chromatin accessibility provides an important window into the regulation of gene expression. Recently, the Assay of Transposase Accessible Chromatin with sequencing (ATAC-seq) was developed to profile genome-wide chromatin accessibility. Here we applied a read-downsampling approach to call robust ATAC-seq peaks in order to profile the regions of differential chromatin accessibility of central amygdala and cortex between different experimental conditions; fear-conditioned vs. control mice and ErbB4 knock-out vs. wild-type mice.
Project description:Multiple sclerosis (MS) affects the cerebral cortex, inducing cortical atrophy and neuronal and synaptic pathology. Despite the fact that women are more susceptible to getting MS, men with MS have worse disability progression. Here, we address sex differences in neurodegenerative mechanisms focusing on the cerebral cortex using the MS model, chronic experimental autoimmune encephalomyelitis (EAE). RNA sequencing of neurons in cerebral cortex during EAE showed robust differential gene expression in male EAE mice compared to male healthy, age-matched, control mice. In contrast, there were few differences in female EAE mice compared to female controls. The most enriched differential gene expression pathways in male mice during EAE were mitochondrial dysfunction and oxidative phosphorylation. Mitochondrial morphology showed significant abnormalities in the cerebral cortex of EAE males, but not EAE females. Regarding function, synaptosomes isolated from cerebral cortex of male EAE mice demonstrated decreased oxygen consumption rates during respirometry assays. Together, cortical neuronal transcriptomics, mitochondrial morphology, and functional respirometry assays in synaptosomes revealed worse neurodegeneration in male EAE mice. This is consistent with worse neurodegeneration in MS men and reveals a model and a target to develop treatments to prevent cortical neurodegeneration and mitigate disability progression in MS men.
Project description:Collagen type II-induced arthritis (CIA) is an autoimmune disease that is accompanied by a complex host systemic response, which includes inflammatory and autoimmune reactions. Since to develop CIA is required the injection of antigen in complete Freund’s adjuvant (CFA), which is a water-in-mineral-oil emulsion containing killed Mycobacteria, systemic response proteins related with inflammation can confound the detection or diagnosis of arthritis. CIA in CD38 deficient mice (CD38 KO) is milder than that in C57BL/6 (B6 WT) mice. Protein extracts from spleen were subjected to 2D-DiGE and MS-MALDI-TOF/TOF analysis to identify proteins that were differentially expressed in CD38 KO and B6 WT mice with arthritis, with inflammation, or non-immunized. Differential protein expression was validated by ELISA, or Western-blotting.
Project description:Collagen type II-induced arthritis (CIA) is an autoimmune disease that is accompanied by a complex host systemic response, which includes inflammatory and autoimmune reactions. Since to develop CIA is required the injection of antigen in complete Freund’s adjuvant (CFA), which is a water-in-mineral-oil emulsion containing killed Mycobacteria, systemic response proteins related with inflammation can confound the detection or diagnosis of arthritis. CIA in CD38 deficient mice (CD38 KO) is milder than that in C57BL/6 (B6 WT) mice. Protein extracts from spleen were subjected to 2D-DiGE and MS-MALDI-TOF/TOF analysis to identify proteins that were differentially expressed in CD38 KO and B6 WT mice with arthritis, with inflammation, or non-immunized. Differential protein expression was validated by ELISA, or Western-blotting.
Project description:Multiple sclerosis (MS) is a chronic inflammatory demyelinating disease of the central nervous system, and in this study we used quantitative proteomics to compare the brain proteomes of two MS mouse models, the immune-mediated experimental autoimmune encephalomyelitis (acute and recovery phase) and cuprizone (late de-/remyelination) with that of corresponding control mice. Proteomics using LC-MS with TMT-labeling and label-free quantification resulted in the quantification of 3664 and 2582 proteins (including protein groups), respectively, a total of 4375 different proteins. Differences between the disease model mice and the controls were revealed and protein candidates were discovered and translated to human disease.
Project description:Multiple sclerosis (MS) is a chronic demyelinating autoimmune disease which targets mature oligodendrocytes (MOLs) and their myelin. MOLs are transcriptionally heterogeneous, and can transition to immune-like states in the context of MS. However, the intricacies of their dynamics throughout disease progression remain poorly understood. Here, we employed simultaneous single-cell multiome ATAC and RNA sequencing targeting oligodendroglia (OLGs) from the experimental autoimmune encephalomyelitis (EAE) MS mouse model, at different stages of the disease course. We found that the transition to immune OLGs states occurs already at early stages of EAE and these persist at late stages of the disease. Interestingly, transcription factor activity suggested immunosuppression activity in MOLs at early stages of EAE and we also observed a transitory activation of a regenerative programme in MOLs at this stage. Importantly, different MOLs present a differential responsiveness to EAE, with MOL2 exhibiting stronger transcriptional immune response than MOL5/6. Moreover, we observed divergence responses at the epigenetic level of MOL2 and MOL5/6 during disease evolution. Thus, our single-cell multiomic resource highlights dynamic and distinct responses of OLG subpopulations to the evolving environment in EAE, which might modulate their response to regenerative therapeutic interventions in MS.
Project description:Multiple sclerosis (MS) is a chronic demyelinating autoimmune disease which targets mature oligodendrocytes (MOLs) and their myelin. MOLs are transcriptionally heterogeneous, and can transition to immune-like states in the context of MS. However, the intricacies of their dynamics throughout disease progression remain poorly understood. Here, we employed simultaneous single-cell multiome ATAC and RNA sequencing targeting oligodendroglia (OLGs) from the experimental autoimmune encephalomyelitis (EAE) MS mouse model, at different stages of the disease course. We found that the transition to immune OLGs states occurs already at early stages of EAE and these persist at late stages of the disease. Interestingly, transcription factor activity suggested immunosuppression activity in MOLs at early stages of EAE and we also observed a transitory activation of a regenerative programme in MOLs at this stage. Importantly, different MOLs present a differential responsiveness to EAE, with MOL2 exhibiting stronger transcriptional immune response than MOL5/6. Moreover, we observed divergence responses at the epigenetic level of MOL2 and MOL5/6 during disease evolution. Thus, our single-cell multiomic resource highlights dynamic and distinct responses of OLG subpopulations to the evolving environment in EAE, which might modulate their response to regenerative therapeutic interventions in MS.
Project description:Collagen type II-induced arthritis (CIA) is an autoimmune disease that is accompanied by a complex host systemic response, which includes inflammatory and autoimmune reactions. Since to develop CIA is required the injection of antigen in complete Freund’s adjuvant (CFA), which is a water-in-mineral-oil emulsion containing killed Mycobacteria, systemic response proteins related with inflammation can confound the detection or diagnosis of arthritis. CIA in CD38 deficient mice (CD38 KO) is milder than that in C57BL/6 (B6 WT) mice. Protein extracts from spleen were subjected to 2D-DiGE and MS-MALDI-TOF/TOF analysis to identify proteins that were differentially expressed in CD38 KO and B6 WT mice with arthritis, with inflammation, or non-immunized. Differential protein expression was validated by ELISA, or Western-blotting.
Project description:Multiple sclerosis (MS) is a chronic demyelinating autoimmune disease which targets mature oligodendrocytes (MOLs) and their myelin. MOLs are transcriptionally heterogeneous, and can transition to immune-like states in the context of MS. However, the intricacies of their dynamics throughout disease progression remain poorly understood. Here, we employed simultaneous single-cell multiome ATAC and RNA sequencing targeting oligodendroglia (OLGs) from the experimental autoimmune encephalomyelitis (EAE) MS mouse model, at different stages of the disease course. We found that the transition to immune OLGs states occurs already at early stages of EAE and these persist at late stages of the disease, consistent with epigenetic memory of previous neuroinflammation. Interestingly, transcription factor activity suggested immunosuppression activity in MOLs at early stages of EAE and we also observed a transitory activation of a regenerative programme in MOLs at this stage. Importantly, different MOLs present a differential responsiveness to EAE, with MOL2 exhibiting stronger transcriptional immune response than MOL5/6. Moreover, we observed divergence responses at the epigenetic level of MOL2 and MOL5/6 during disease evolution. Thus, our single-cell multiomic resource highlights dynamic and distinct responses of OLG subpopulations to the evolving environment in EAE, which might modulate their response to regenerative therapeutic interventions in MS.