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What’s the secret to living to 100? Centenarian stem cells could offer clues
A bank of cells from people more than 100 years old gives scientists a new resource for studying longevity
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Linkup aims to drive research into pulmonary fibrosis, a disease with no cure | Click here to read
The Brink | By Andrew Thurston | Photos by Cydney Scott
October 17, 2024
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Todd W. Dowrey, Samuel F. Cranston, Nicholas Skvir, Yvonne Lok, Brian Gould, Bradley Petrowitz, Daniel Villar, Jidong Shan, Marianne James, Mark Dodge, Anna C. Belkina, Richard M. Giadone, Sofiya Milman, Paola Sebastiani, Thomas T. Perls, Stacy L. Anderson, George J. Murphy.
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Publication from the Murphy Lab: Click here to read the article.
Alveolar epithelial type I cells (AT1s) line the gas exchange barrier of the distal lung and have been historically challenging to isolate or maintain in cell culture. Here, we engineer a human in vitro AT1 model system via directed differentiation of induced pluripotent stem cells (iPSCs). We use primary adult AT1 global transcriptomes to suggest benchmarks and pathways, such as Hippo-LATS-YAP/TAZ signaling, enriched in these cells. Next, we generate iPSC-derived alveolar epithelial type II cells (AT2s) and find that nuclear YAP signaling is sufficient to promote a broad transcriptomic shift from AT2 to AT1 gene programs. The resulting cells express a molecular, morphologic, and functional phenotype reminiscent of human AT1 cells, including the capacity to form a flat epithelial barrier producing characteristic extracellular matrix molecules and secreted ligands. Our results provide an in vitro model of human alveolar epithelial differentiation and a potential source of human AT1s.