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    The single-cell transcriptomic landscape of early human diabetic nephropathy

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    Author
    Wilson, P.C.
    Wu, H.
    Welling, P.A.
    Date
    2019
    Journal
    Proceedings of the National Academy of Sciences of the United States of America
    Publisher
    National Academy of Sciences
    Type
    Article
    
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    See at
    https://doi.org/10.1073/pnas.1908706116
    Abstract
    Diabetic nephropathy is characterized by damage to both the glomerulus and tubulointerstitium, but relatively little is known about accompanying cell-specific changes in gene expression. We performed unbiased single-nucleus RNA sequencing (snRNA-seq) on cryopreserved human diabetic kidney samples to generate 23,980 single-nucleus transcriptomes from 3 control and 3 early diabetic nephropathy samples. All major cell types of the kidney were represented in the final dataset. Side-by-side comparison demonstrated cell-type-specific changes in gene expression that are important for ion transport, angiogenesis, and immune cell activation. In particular, we show that the diabetic thick ascending limb, late distal convoluted tubule, and principal cells all adopt a gene expression signature consistent with increased potassium secretion, including alterations in Na+/K+-ATPase, WNK1, mineralocorticoid receptor, and NEDD4L expression, as well as decreased paracellular calcium and magnesium reabsorption. We also identify strong angiogenic signatures in glomerular cell types, proximal convoluted tubule, distal convoluted tubule, and principal cells. Taken together, these results suggest that increased potassium secretion and angiogenic signaling represent early kidney responses in human diabetic nephropathy.
    Sponsors
    This work was supported by National Institute of Diabetic and Digestive and Kidney Diseases Diabetic Complications Consortium (https://www.diacomp.org) Grants DK076169, DK115255, 173970 from the Chan Zuckerberg Initiative, DK104308, DK054231, and the Fondation Leducq.
    Keyword
    Diabetic nephropathy
    RNA-seq
    Single cell
    Identifier to cite or link to this item
    https://www.scopus.com/inward/record.uri?eid=2-s2.0-85072630804&doi=10.1073%2fpnas.1908706116&partnerID=40&md5=a6173f7dde69e79586e3fcab5a50803e; http://hdl.handle.net/10713/11034
    ae974a485f413a2113503eed53cd6c53
    10.1073/pnas.1908706116
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