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Dysregulated N6-methyladenosine modification in peripheral immune cells contributes to the pathogenesis of amyotrophic lateral sclerosis

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Frontiers of Medicine 2024年第2期18卷 285-302页

作者： Di He Xunzhe Yang Liyang Liu Dongchao Shen Qing Liu Mingsheng Liu Xue Zhang Liying Cui Department of Neurology Peking Union Medical College Hospital(PUMCH)Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing100730China Medical Doctor Program Chinese Academy of Medical Science and Peking Union Medical CollegeBeijing100730China McKusick-Zhang Center for Genetic Medicine State Key Laboratory of Medical Molecular BiologyInstitute of Basic Medical Sciences Chinese Academy of Medical SciencesSchool of Basic MedicinePeking Union Medical CollegeBeijing100730China Neuroscience Center Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing100730China

Amyotrophic lateral sclerosis(ALS)is a progressive neurogenerative disorder with uncertain origins.Emerging evidence implicates N6-methyladenosine(m6A)modification in ALS pathogenesis.Methylated rna immunoprecipitation sequencing(MeRIP-seq)and liquid chromatography–mass spectrometry were utilized for m6A profiling in peripheral immune cells and serum proteome analysis,respectively,in patients with ALS(n=16)and controls(n=6).The single-cell transcriptomic dataset(GSE174332)of primary motor cortex was further analyzed to illuminate the biological implications of differentially methylated genes and cell communication changes.analysis of peripheral immune cells revealed extensive rna hypermethylation,highlighting candidate genes with differential m6A modification and expression,including C-X3-C motif chemokine receptor 1(CX3CR1).In RAW264.7 macrophages,disrupted CX3CR1 signaling affected chemotaxis,potentially influencing immune cell migration in ALS.Serum proteome analysis demonstrated the role of dysregulated immune cell migration in ALS.cell type-specific expression variations of these genes in the central nervous system(CNS),particularly microglia,were observed.Intercellular communication between neurons and glial cells was selectively altered in ALS CNS.This integrated approach underscores m6A dysregulation in immune cells as a potential ALS contributor.

关键词： amyotrophic lateral sclerosis N^(6)-methyladenosine epi-transcriptome proteome single cell rna sequencing analysis CX3CR1

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