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MAPK pathway and B cells overactivation in multiple sclerosis revealed by phosphoproteomics and genomic analysis
- Publication Year :
- 2019
- Publisher :
- National Academy of Sciences, 2019.
-
Abstract
- Dysregulation of signaling pathways in multiple sclerosis (MS) can be analyzed by phosphoproteomics in peripheral blood mononuclear cells (PBMCs). We performed in vitro kinetic assays on PBMCs in 195 MS patients and 60 matched controls and quantified the phosphorylation of 17 kinases using xMAP assays. Phosphoprotein levels were tested for association with genetic susceptibility by typing 112 single-nucleotide polymorphisms (SNPs) associated with MS susceptibility. We found increased phosphorylation of MP2K1 in MS patients relative to the controls. Moreover, we identified one SNP located in the PHDGH gene and another on IRF8 gene that were associated with MP2K1 phosphorylation levels, providing a first clue on how this MS risk gene may act. The analyses in patients treated with disease-modifying drugs identified the phosphorylation of each receptor’s downstream kinases. Finally, using flow cytometry, we detected in MS patients increased STAT1, STAT3, TF65, and HSPB1 phosphorylation in CD19 + cells. These findings indicate the activation of cell survival and proliferation (MAPK), and proinflammatory (STAT) pathways in the immune cells of MS patients, primarily in B cells. The changes in the activation of these kinases suggest that these pathways may represent therapeutic targets for modulation by kinase inhibitors.
- Subjects :
- Male
Proteomics
MAPK/ERK pathway
Multiple Sclerosis
Cell Survival
MAP Kinase Signaling System
610 Medicine & health
Polymorphism, Single Nucleotide
CD19
Humans
STAT1
Phosphorylation
STAT3
Cell Proliferation
B-Lymphocytes
1000 Multidisciplinary
Multidisciplinary
biology
Kinase
Phosphoproteomics
Biological Sciences
Phosphoproteins
Molecular biology
10040 Clinic for Neurology
biology.protein
Female
Signal transduction
Protein Kinases
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....185f36e00d4d57e8cdf512da41a69f05
- Full Text :
- https://doi.org/10.5167/uzh-172331