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Here, a disease-relevant, vascularized tumoroid in vitro model with stem-like features and stromal surrounds is reported. The model is used to recapitulate how individual components of the GBM\u2019s complex brain microenvironment such as hypoxia, vasculature-related stromal cells and growth factors support GBM angiogenesis. It is scalable, tractable, cost-effective and can be used with biologically-derived or biomimetic matrices. Patient-derived primary GBM cells are found to closely participate in blood vessel formation in contrast to a GBM cell line containing differentiated cells. Exogenous growth factors amplify this effect under normoxia but not at hypoxia suggesting that a significant amount of growth factors is already being produced under hypoxic conditions. Under hypoxia, primary GBM cells strongly co-localize with umbilical vein endothelial cells to form sprouting vascular networks, which has been reported to occur in vivo. These findings demonstrate that our 3D tumoroid in vitro model exhibits biomimetic attributes that may permit its use as a preclinical model in studying microenvironment cues of tumor angiogenesis.<\/jats:p>","DOI":"10.1038\/s41598-021-98911-y","type":"journal-article","created":{"date-parts":[[2021,10,1]],"date-time":"2021-10-01T07:02:54Z","timestamp":1633071774000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":49,"title":["A vascularized tumoroid model for human glioblastoma angiogenesis"],"prefix":"10.1038","volume":"11","author":[{"given":"Agavi Stavropoulou","family":"Tatla","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexander W.","family":"Justin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Colin","family":"Watts","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Athina E.","family":"Markaki","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,10,1]]},"reference":[{"key":"98911_CR1","doi-asserted-by":"publisher","first-page":"5","DOI":"10.1016\/j.jocn.2018.12.019","volume":"61","author":"B Van Schaijik","year":"2019","unstructured":"Van Schaijik, B. et al. 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