Pleural Effusion Aspirate for Use in 3D Lung Cancer Modeling and Chemotherapy Screening.

Lung cancer is the leading cause of cancer-related deaths worldwide, yet most currently used in vitro cancer models are confined to traditional 2D cell culture conditions. Recently; however, innovative 3D models such as tumor tissue equivalents (organoids) have been adopted by researchers to recapitulate tissue architecture and physiology in order to improve disease modeling and drug testing. We have hypothesized that 3D lung organoids, incorporating cells directly from patients, will enable personalized disease modeling and tumor cell characterization compared to traditional 2D cultures. Here, we discuss the fabrication of 3D lung cancer organoids using a rare cell source, pleural effusion aspirate. We tracked the phenotypic change that developed in short-term culturing and characterized the cell population within the organoids. We found that isolated patient cells embedded directly into organoids created anatomically relevant structures and displayed lung cancer specific behaviors compared to cultures that first grew in 2D conditions. Additionally, we compared responses of patient cells from pleural effusion aspirates to chemotherapy in 2D and 3D cell culture systems. Our results show that cells in 2D cultures are more sensitive to treatment when compared with 3D organoids. Collectively, we have been able to isolate tumor cells from pleural effusion fluid of lung cancer patients and create organoids that display in vivo like anatomy and drug response. This technology can serve as a more accurate disease model for studying tumor progression and drug development.