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Profiling Chromatin Accessibility at Single-cell Resolution

Genomics, Proteomics & Bioinformatics 2021年第2期19卷 172-190页

作者： Sarthak Sinha Ansuman T.Satpathy Weiqiang Zhou Hongkai Ji jo a.stratton Arzina Jaffer Nizar Bahlis Sorana Morrissy Jeff A.Biernaskie Department of Comparative Biology&Experimental Medicine Faculty of Veterinary MedicineUniversity of CalgaryCalgaryAB T2N 4N1Canada Department of Pathology Stanford University School of MedicineStanfordCA 94305USA Department of Biostatistics Bloomberg School of Public HealthJohns Hopkins UniversityBaltimoreMD 21205USA Alberta Children’s Hospital Research Institute University of CalgaryCalgaryAB T2N 4N1Canada Hotchkiss Brain Institute University of CalgaryCalgaryAB T2N 4N1Canada Arnie Charbonneau Cancer Institute University of CalgaryCalgaryAB T2N 4Z6Canada Department of Biochemistry and Molecular Biology Cumming School of MedicineUniversity of CalgaryCalgaryAB T2N 4N1Canada

How distinct transcriptional programs are enacted to generate cellular heterogeneity and plasticity,and enable complex fate decisions are important open *** key regulator is the cell’s epigenome state that drives distinct transcriptional programs by regulating chromatin ***-wide chromatin accessibility measurements can impart insights into regulatory sequences(in)accessible to DNA-binding proteins at a single-cell *** review outlines molecular methods and bioinformatic tools for capturing cell-to-cell chromatin variation using single-cell assay for transposase-accessible chromatin using sequencing(scATAC-seq)in a scalable *** also covers joint profiling of chromatin with transcriptome/proteome measurements,computational strategies to integrate multi-omic measurements,and predictive bioinformatic tools to infer chromatin accessibility from single-cell transcriptomic *** refinements that increase power for cell discovery through robust chromatin coverage and integrate measurements from multiple modalities will further expand our understanding of gene regulation during homeostasis and disease.

关键词： Single-cell ATAC-seq Gene regulation Epigenetics Single-cell multi-omics Cis-regulatory elements

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Heterogeneity of mature oligodendrocytes in the central nervous system

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Neural Regeneration Research 2025年第5期20卷 1336-1349页

作者： Chao Weng Adam M.R.Groh Moein Yaqubi Qiao-Ling Cui jo Anne stratton G.R.Wayne Moore Jack P.Antel Neuroimmunology Unit Montreal Neurological Institute-HospitalDepartment of Neurology and NeurosurgeryMcGill UniversityMontrealQCCanada Department of Neurology Renmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina

Mature oligodendrocytes form myelin sheaths that are crucial for the insulation of axons and efficient signal transmission in the central nervous *** evidence has challenged the classical view of the functionally static mature oligodendrocyte and revealed a gamut of dynamic functions such as the ability to modulate neuronal circuitry and provide metabolic support to *** the recognition of potential heterogeneity in mature oligodendrocyte function,a comprehensive summary of mature oligodendrocyte diversity is *** delve into early 20th-century studies by Robertson and Río-Hortega that laid the foundation for the modern identification of regional and morphological heterogeneity in mature ***,recent morphologic and functional studies call into question the long-assumed homogeneity of mature oligodendrocyte function through the identification of distinct subtypes with varying myelination ***,modern molecular investigations,employing techniques such as single cell/nucleus RNA sequencing,consistently unveil at least six mature oligodendrocyte subpopulations in the human central nervous system that are highly transcriptomically diverse and vary with central nervous system *** and disease related mature oligodendrocyte variation denotes the impact of pathological conditions such as multiple sclerosis,Alzheimer's disease,and psychiatric ***,caution is warranted when subclassifying mature oligodendrocytes because of the simplification needed to make conclusions about cell identity from temporally confined *** studies leveraging advanced techniques like spatial transcriptomics and single-cell proteomics promise a more nuanced understanding of mature oligodendrocyte *** research avenues that precisely evaluate mature oligodendrocyte heterogeneity with care to understand the mitigating influence of species,sex,central nervous system region,age,and disease,

关键词： aging central nervous system diseases electron microscopy heterogeneity immunohistochemistry myelin sheath natural history neuroglia oligodendroglia single-cell gene expression analysis

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维普期刊数据库

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Ependymal cells and multiple sclerosis: proposing a relationship

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Neural Regeneration Research 2020年第2期15卷 263-264页

作者： Dale Hatrock Nina Caporicci-nucci jo Anne stratton The Montreal Neurological Institute McGill UniversityMontrealCanada Integrated Program in Neuroscience McGill UniversityMontrealCanada

Multiple sclerosis (MS) currently affects ~2.5 million people worldwide. MS is typically diagnosed in young adults and is usually not fatal, meaning people live long lives with MS. Affected individuals usually suffer from progressive physical and/or cognitive disability, often including fatigue (89.6%), depression (53.9%), memory loss (49.0%), motor or sensory dysfunction (76.4%, 70.4%) and urinary incontinence (50.8%).

关键词： multiple sclerosis relationship dysfunction

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维普期刊数据库

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Macrophage polarization in nerve injury： do Schwann cells play a role？

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Neural Regeneration Research 2016年第1期11卷 53-57页

作者： jo Anne stratton Prajay T.Shah Department of Clinical Neurosciences University of Calgary Calgary Canada Hotchkiss Brain Institute Calgary Canada Department of Comparative Biology and Experimental Medicine University of Calgary Calgary Canada

In response to peripheral nerve injury, the inflammatory response is almost entirely comprised of infiltrating macrophages. Macrophages are a highly plastic, heterogenic immune cell, playing an indispensable role in peripheral nerve injury, clearing debris and regulating the microenvironment to allow for efficient regeneration. There are several cells within the microenvironment that likely interact with macrophages to support their function – most notably the Schwann cell, the glial cell of the peripheral nervous system. Schwann cells express several ligands that are known to interact with receptors expressed by macrophages, yet the effects of Schwann cells in regulating macrophage phenotype remains largely unexplored. This review discusses macrophages in peripheral nerve injury and how Schwann cells may regulate their behavior.

关键词： nerve macrophage traumatic injury Schwann cells polarization

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