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In vivo developmental trajectories of human podocyte development inform in vitro differentiation of pluripotent stem-cell derived podocytes (d16_d24_kidney_organoid)

Tracy Tran, Nils O. Lindström, Andrew Ransick, Guilherme De Sena Brandine, Qiuyu Guo, Albert D. Kim, Balint Der, Janos Peti-Peterdi, Andrew D. Smith, Matthew Thornton, Brendan Grubbs, Jill A. McMahon, Andrew P. McMahon

The renal corpuscle of the kidney comprises a glomerular vasculature embraced by podocytes and supported by mesangial myofibroblasts, which ensure plasma filtration at the podocyte-generated slit diaphragm. With a spectrum of podocyte-expressed gene mutations causing chronic disease, an enhanced understanding of podocyte development and function to create relevant in vitro podocyte models is a clinical imperative. To characterize podocyte development, scRNA-seq was performed on human fetal kidneys, identifying distinct transcriptional signatures accompanying the differentiation of functional podocytes from progenitors. Interestingly, organoid-generated podocytes exhibited highly similar, progressive transcriptional profiles despites an absence of the vasculature, although abnormal gene expression was pinpointed in late podocytes. On transplantation into mice, organoid-derived podocytes recruited the host vasculature and partially corrected transcriptional profiles. Thus, human podocyte development is mostly intrinsically regulated and vascular interactions refine maturation. These studies support the application of organoid-derived podocytes to model disease and to restore or replace normal kidney functions.

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Species: human
Number of cells: 7721
Number of downloads: 1
Study size: 327MB
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Organoid 
Kidney 
podocyte