Ozan, Vedat BurakVedat BurakOzanWang, HuijuanHuijuanWangAkshay, AkshayAkshayAkshay0000-0003-3186-7478Anand, DeepikaDeepikaAnandHibaoui, YoussefYoussefHibaouiFeki, AnisAnisFekiGote-Schniering, JanineJanineGote-SchnieringHashemi Gheinani, AliAliHashemi Gheinani0000-0002-9625-6259Heller, ManfredManfredHeller0000-0002-6364-7325Uldry, Anne-ChristineAnne-ChristineUldryBraga, Sophie Marie-PierreSophie Marie-PierreBragaGazdhar, AmiqAmiqGazdharGeiser, ThomasThomasGeiser2024-11-202024-11-202025-01https://boris-portal.unibe.ch/handle/20.500.12422/189294Induced pluripotent stem cells (iPSCs) have emerged as promising in vitro tools, providing a robust system for disease modelling and facilitating drug screening. Human iPSCs have been successfully differentiated into lung cells and three-dimensional lung spheroids or organoids. The lung is a multicellular complex organ that develops under the symphonic influence of the microenvironment. Here, we hypothesize that the generation of lung organoids in a controlled microenvironment (cmO) (oxygen and pressure) yields multicellular organoids with architectural complexity resembling the lung alveoli. iPSCs were differentiated into mature lung organoids following a stepwise protocol in an oxygen and pressure-controlled microenvironment. The organoids developed in the controlled microenvironment displayed complex alveolar architecture and stained for SFTPC, PDPN, and KRT5, indicating the presence of alveolar epithelial type II and type I cells, as well as basal cells. Moreover, gene and protein expression levels were also increased in the cmO. Furthermore, pathway analysis of proteomics revealed upregulation of lung development-specific pathways in the cmO compared to those growing in normal culture conditions. In summary, by using a controlled microenvironment, we established a complex multicellular lung organoid derived from iPSCs as a novel cellular model to study lung alveolar biology in both lung health and disease.en3D organoidsInduced pluripotent stem cellsLung organoidsLung proteomicsMulticellular lung organoid600 - Technology::610 - Medicine & healtharticle10.48620/764003941793010.1007/s12015-024-10789-1