摘要
Marrow niches in osteosarcoma(OS)are a specialized microenvironment that is essential for the maintenance and regulation of OS cells.However,existing animal xenograft models are plagued by variability,complexity,and high cost.Herein,we used a decellularized osteosarcoma extracellular matrix(dOsEM)loaded with extracellular vesicles from human bone marrow-derived stem cells(hBMSC-EVs)and OS cells as a bioink to construct a micro-osteosarcoma(micro-OS)through 3D printing.The micro-OS was further combined with a microfluidic system to develop into an OS-on-a-chip(OOC)with a built-in recirculating perfusion system.The OOC system successfully integrated bone marrow niches,cell‒cell and cell-matrix crosstalk,and circulation,allowing a more accurate representation of OS characteristics in vivo.Moreover,the OOC system may serve as a valuable research platform for studying OS biological mechanisms compared with traditional xenograft models and is expected to enable precise and rapid evaluation and consequently more effective and comprehensive treatments for OS.
基金
the Shanghai Pujiang Program(21PJ1409200)
the China Postdoctoral Science Foundation(2022M722122)
Three-year Action Plan of Shenkang Development Center(SHDC2020CR2019B)
Biomaterials and Regenerative Medicine Institute Cooperative Research Project,Shanghai Jiao Tong University School of Medicine(2022LHB07,2022LHA01)
Shanghai Frontiers Science Center of Degeneration and Regeneration in Skeletal System
the Fundamental Research Funds for the Central Universities(YG2023LC07)
Clinical Research Program of Shanghai Ninth People’s Hospital,Shanghai Jiao Tong University School of Medicine(JYLJ202122)
the Project of Biobank from Shanghai Ninth People’s Hospital,Shanghai Jiao Tong University School of Medicine(YBKB202116)
the National Scientific Foundation of China(82171993,81972058,82130073).
