TY - JOUR AU - Oscar J. Abilez AU - Huaxiao Yang AU - Yuan Guan AU - Mengcheng Shen AU - Zehra Yildirim AU - Yan Zhuge AU - Ravichandra Venkateshappa AU - Shane R. Zhao AU - Angello H. Gomez AU - Marcel El-Mokahal AU - Logan Dunkenberger AU - Yoshikazu Ono AU - Masafumi Shibata AU - Peter N. Nwokoye AU - Lei Tian AU - Kitchener D. Wilson AU - Evan H. Lyall AU - Fangjun Jia AU - Hung Ta Wo AU - Gao Zhou AU - Bryan Aldana AU - Ioannis Karakikes AU - Detlef Obal AU - Gary Peltz AU - Christopher K. Zarins AU - Joseph C. Wu AB - Although model organisms have provided insight into the earliest stages of cardiac and hepatic vascularization, we know very little about this process in humans because of ethical restrictions and the technical difficulty of obtaining embryos during very early development. In this study, we demonstrate that micropatterned human pluripotent stem cell–derived gastruloids enable in vitro modeling of the earliest stages of vascularization. We identify a combination of vascular-inducing factors that give rise to cardiac vascularized organoids with a spatially organized and branched vascular network. To show the broader utility of our vascularization strategy, we use the same vascular-inducing factors to produce hepatic vascularized organoids. Our results suggest that a conserved developmental program generates the vasculature within different types of organs. BT - Science DA - 2025-06-05 DO - 10.1126/science.adu9375 IS - 6751 N2 - Although model organisms have provided insight into the earliest stages of cardiac and hepatic vascularization, we know very little about this process in humans because of ethical restrictions and the technical difficulty of obtaining embryos during very early development. In this study, we demonstrate that micropatterned human pluripotent stem cell–derived gastruloids enable in vitro modeling of the earliest stages of vascularization. We identify a combination of vascular-inducing factors that give rise to cardiac vascularized organoids with a spatially organized and branched vascular network. To show the broader utility of our vascularization strategy, we use the same vascular-inducing factors to produce hepatic vascularized organoids. Our results suggest that a conserved developmental program generates the vasculature within different types of organs. PY - 2025 EP - eadu9375 T2 - Science TI - Gastruloids enable modeling of the earliest stages of human cardiac and hepatic vascularization UR - https://www.science.org/doi/10.1126/science.adu9375 VL - 388 Y2 - 2025-10-02 ER -