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Moos F, Suppinger S, de Medeiros G, Oost KC, Boni A, Rémy C, Weevers SL, Tsiairis C, Strnad P, Liberali P. Open-top multisample dual-view light-sheet microscope for live imaging of large multicellular systems. Nat Methods 2024; 21:798-803. [PMID: 38509326 PMCID: PMC11093739 DOI: 10.1038/s41592-024-02213-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 02/15/2024] [Indexed: 03/22/2024]
Abstract
Multicellular systems grow over the course of weeks from single cells to tissues or even full organisms, making live imaging challenging. To bridge spatiotemporal scales, we present an open-top dual-view and dual-illumination light-sheet microscope dedicated to live imaging of large specimens at single-cell resolution. The configuration of objectives together with a customizable multiwell mounting system combines dual view with high-throughput multiposition imaging. We use this microscope to image a wide variety of samples and highlight its capabilities to gain quantitative single-cell information in large specimens such as mature intestinal organoids and gastruloids.
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Affiliation(s)
- Franziska Moos
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Simon Suppinger
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Gustavo de Medeiros
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland
- Viventis Microscopy Sàrl, Lausanne, Switzerland
| | | | - Andrea Boni
- Viventis Microscopy Sàrl, Lausanne, Switzerland
| | | | - Sera Lotte Weevers
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Charisios Tsiairis
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Petr Strnad
- Viventis Microscopy Sàrl, Lausanne, Switzerland.
| | - Prisca Liberali
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland.
- University of Basel, Basel, Switzerland.
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2
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Hafa L, Breideband L, Ramirez Posada L, Torras N, Martinez E, Stelzer EHK, Pampaloni F. Light Sheet-Based Laser Patterning Bioprinting Produces Long-Term Viable Full-Thickness Skin Constructs. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2306258. [PMID: 37822216 DOI: 10.1002/adma.202306258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 10/04/2023] [Indexed: 10/13/2023]
Abstract
Tissue engineering holds great promise for biomedical research and healthcare, offering alternatives to animal models and enabling tissue regeneration and organ transplantation. 3D bioprinting stands out for its design flexibility and reproducibility. Here, an integrated fluorescent light sheet bioprinting and imaging system is presented that combines high printing speed (0.66 mm3 /s) and resolution (9 µm) with light sheet-based imaging. This approach employs direct laser patterning and a static light sheet for confined voxel crosslinking in photocrosslinkable materials. The developed bioprinter enables real-time monitoring of hydrogel crosslinking using fluorescent recovery after photobleaching (FRAP) and brightfield imaging as well as in situ light sheet imaging of cells. Human fibroblasts encapsulated in a thiol-ene click chemistry-based hydrogel exhibited high viability (83% ± 4.34%) and functionality. Furthermore, full-thickness skin constructs displayed characteristics of both epidermal and dermal layers and remained viable for 41 days. The integrated approach demonstrates the capabilities of light sheet bioprinting, offering high speed, resolution, and real-time characterization. Future enhancements involving solid-state laser scanning devices such as acousto-optic deflectors and modulators will further enhance resolution and speed, opening new opportunities in light-based bioprinting and advancing tissue engineering.
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Affiliation(s)
- Levin Hafa
- Institute of Cell Biology and Neurosciences (IZN), Buchman Institute for Molecular Life Sciences (BMLS), Goethe-Universität Frankfurt am Main, Max-von-Laue-Straße 15, 60438, Frankfurt am Main, Germany
| | - Louise Breideband
- Institute of Cell Biology and Neurosciences (IZN), Buchman Institute for Molecular Life Sciences (BMLS), Goethe-Universität Frankfurt am Main, Max-von-Laue-Straße 15, 60438, Frankfurt am Main, Germany
| | - Lucas Ramirez Posada
- Institute of Cell Biology and Neurosciences (IZN), Buchman Institute for Molecular Life Sciences (BMLS), Goethe-Universität Frankfurt am Main, Max-von-Laue-Straße 15, 60438, Frankfurt am Main, Germany
| | - Núria Torras
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), Barcelona, 08028, Spain
| | - Elena Martinez
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), Barcelona, 08028, Spain
| | - Ernst H K Stelzer
- Institute of Cell Biology and Neurosciences (IZN), Buchman Institute for Molecular Life Sciences (BMLS), Goethe-Universität Frankfurt am Main, Max-von-Laue-Straße 15, 60438, Frankfurt am Main, Germany
| | - Francesco Pampaloni
- Institute of Cell Biology and Neurosciences (IZN), Buchman Institute for Molecular Life Sciences (BMLS), Goethe-Universität Frankfurt am Main, Max-von-Laue-Straße 15, 60438, Frankfurt am Main, Germany
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3
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Haydo A, Wehle A, Herold-Mende C, Kögel D, Pampaloni F, Linder B. Combining organotypic tissue culture with light-sheet microscopy (OTCxLSFM) to study glioma invasion. EMBO Rep 2023; 24:e56964. [PMID: 37938214 DOI: 10.15252/embr.202356964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 10/11/2023] [Accepted: 10/13/2023] [Indexed: 11/09/2023] Open
Abstract
Glioblastoma is a very aggressive tumor and represents the most common primary brain malignancy. Key characteristics include its high resistance against conventional treatments, such as radio- and chemotherapy and its diffuse tissue infiltration, preventing complete surgical resection. The analysis of migration and invasion processes in a physiological microenvironment allows for enhanced understanding of these phenomena and can lead to improved therapeutic approaches. Here, we combine two state-of-the-art techniques, adult organotypic brain tissue slice culture (OTC) and light-sheet fluorescence microscopy (LSFM) of cleared tissues in a combined method termed OTCxLSFM. Using this methodology, we can show that glioblastoma tissue infiltration can be effectively blocked through treatment with arsenic trioxide or WP1066, as well as genetic depletion of the tetraspanin, transmembrane receptor CD9, or signal transducer and activator of transcription 3 (STAT3). With our analysis pipeline, we gain single-cell level, three-dimensional information, as well as insights into the morphological appearance of the tumor cells.
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Affiliation(s)
- Alicia Haydo
- Experimental Neurosurgery, Department of Neurosurgery, Neuroscience Center, Goethe University Hospital, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Andrej Wehle
- Experimental Neurosurgery, Department of Neurosurgery, Neuroscience Center, Goethe University Hospital, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Christel Herold-Mende
- Division of Experimental Neurosurgery, Department of Neurosurgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Donat Kögel
- Experimental Neurosurgery, Department of Neurosurgery, Neuroscience Center, Goethe University Hospital, Goethe University Frankfurt, Frankfurt am Main, Germany
- German Cancer Consortium (DKTK) Partner site Frankfurt/Main, a partnership between DKFZ and Goethe University Hospital, Frankfurt am Main, Germany
| | - Francesco Pampaloni
- Buchmann Institute for Molecular Life Sciences (BMLS), Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Benedikt Linder
- Experimental Neurosurgery, Department of Neurosurgery, Neuroscience Center, Goethe University Hospital, Goethe University Frankfurt, Frankfurt am Main, Germany
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4
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D'Imprima E, Garcia Montero M, Gawrzak S, Ronchi P, Zagoriy I, Schwab Y, Jechlinger M, Mahamid J. Light and electron microscopy continuum-resolution imaging of 3D cell cultures. Dev Cell 2023; 58:616-632.e6. [PMID: 36990090 PMCID: PMC10114294 DOI: 10.1016/j.devcel.2023.03.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 12/14/2022] [Accepted: 03/02/2023] [Indexed: 03/30/2023]
Abstract
3D cell cultures, in particular organoids, are emerging models in the investigation of healthy or diseased tissues. Understanding the complex cellular sociology in organoids requires integration of imaging modalities across spatial and temporal scales. We present a multi-scale imaging approach that traverses millimeter-scale live-cell light microscopy to nanometer-scale volume electron microscopy by performing 3D cell cultures in a single carrier that is amenable to all imaging steps. This allows for following organoids' growth, probing their morphology with fluorescent markers, identifying areas of interest, and analyzing their 3D ultrastructure. We demonstrate this workflow on mouse and human 3D cultures and use automated image segmentation to annotate and quantitatively analyze subcellular structures in patient-derived colorectal cancer organoids. Our analyses identify local organization of diffraction-limited cell junctions in compact and polarized epithelia. The continuum-resolution imaging pipeline is thus suited to fostering basic and translational organoid research by simultaneously exploiting the advantages of light and electron microscopy.
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Affiliation(s)
- Edoardo D'Imprima
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany
| | - Marta Garcia Montero
- Cell Biology and Biophysics Unit, European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany
| | - Sylwia Gawrzak
- Cell Biology and Biophysics Unit, European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany
| | - Paolo Ronchi
- Electron Microscopy Core Facility, European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany
| | - Ievgeniia Zagoriy
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany
| | - Yannick Schwab
- Cell Biology and Biophysics Unit, European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany; Electron Microscopy Core Facility, European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany
| | - Martin Jechlinger
- Cell Biology and Biophysics Unit, European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany.
| | - Julia Mahamid
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany; Cell Biology and Biophysics Unit, European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany.
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5
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Zhu T, Nie J, Yu T, Zhu D, Huang Y, Chen Z, Gu Z, Tang J, Li D, Fei P. Large-scale high-throughput 3D culture, imaging, and analysis of cell spheroids using microchip-enhanced light-sheet microscopy. BIOMEDICAL OPTICS EXPRESS 2023; 14:1659-1669. [PMID: 37078040 PMCID: PMC10110308 DOI: 10.1364/boe.485217] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 02/24/2023] [Accepted: 03/06/2023] [Indexed: 05/03/2023]
Abstract
Light sheet microscopy combined with a microchip is an emerging tool in biomedical research that notably improves efficiency. However, microchip-enhanced light-sheet microscopy is limited by noticeable aberrations induced by the complex refractive indices in the chip. Herein, we report a droplet microchip that is specifically engineered to be capable of large-scale culture of 3D spheroids (over 600 samples per chip) and has a polymer index matched to water (difference <1%). When combined with a lab-built open-top light-sheet microscope, this microchip-enhanced microscopy technique allows 3D time-lapse imaging of the cultivated spheroids with ∼2.5-µm single-cell resolution and a high throughput of ∼120 spheroids per minute. This technique was validated by a comparative study on the proliferation and apoptosis rates of hundreds of spheroids with or without treatment with the apoptosis-inducing drug Staurosporine.
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Affiliation(s)
- Tingting Zhu
- School of Optical and Electronic Information - Wuhan National Laboratory for Optoelectronics - Advanced Biomedical Imaging Facility, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Jun Nie
- Institute for Cell Analysis, Shenzhen Bay Laboratory, Shenzhen 518132, China
| | - Tingting Yu
- Britton Chance Center for Biomedical Photonics - MoE Key Laboratory for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics - Advanced Biomedical Imaging Facility, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
| | - Dan Zhu
- Britton Chance Center for Biomedical Photonics - MoE Key Laboratory for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics - Advanced Biomedical Imaging Facility, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
| | - Yanyi Huang
- Institute for Cell Analysis, Shenzhen Bay Laboratory, Shenzhen 518132, China
- College of Chemistry, Biomedical Pioneering Innovation Center (BIOPIC), Peking University, Beijing 100871, China
| | - Zaozao Chen
- State Key Laboratory of Bioelectronics School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Zhongze Gu
- State Key Laboratory of Bioelectronics School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Jiang Tang
- School of Optical and Electronic Information - Wuhan National Laboratory for Optoelectronics - Advanced Biomedical Imaging Facility, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Dongyu Li
- School of Optical and Electronic Information - Wuhan National Laboratory for Optoelectronics - Advanced Biomedical Imaging Facility, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Peng Fei
- School of Optical and Electronic Information - Wuhan National Laboratory for Optoelectronics - Advanced Biomedical Imaging Facility, Huazhong University of Science and Technology, Wuhan 430074, China
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6
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Samal P, Gubbins E, van Blitterswijk C, Truckenmüller R, Giselbrecht S. Thin fluorinated polymer film microcavity arrays for 3D cell culture and label-free automated feature extraction. Biomater Sci 2021; 9:7838-7850. [PMID: 34671787 DOI: 10.1039/d1bm00718a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
There is an increasing need for automated label-free morphometric analysis using brightfield microscopy images of 3D cell culture systems. This requires automated feature detection which can be achieved by improving the image contrast, e.g. by reducing the refractive index mismatch in the light path. Here, a novel microcavity platform fabricated using microthermoforming of thin fluorinated ethylene-propylene (FEP) films which match the refractive index of cell culture medium and provide a homogenous background signal intensity is described. FEP is chemically inert, mechanically stable and has been used as a substrate for light sheet microscopy. The microcavities promote formation of mouse embryonic stem cell (mESC) aggregates, which show axial elongation and germ layer specification similar to embryonic development. A label-free feature extraction pipeline based on a machine-learning plugin for FIJI is used to extract morphometric features from time-lapse imaging in a highly robust and reproducible manner. Lastly, the pipeline is utilized for testing the effect of the drug Latrunculin A on the mESC aggregates, highlighting the platform's potential for high-content screening (HCS) in drug discovery. This new microengineered tool is an important step towards label-free imaging of free-floating stem cell aggregates and paves the way for high-content drug testing and translational studies.
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Affiliation(s)
- Pinak Samal
- MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands.
| | - Eva Gubbins
- MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands.
| | - Clemens van Blitterswijk
- MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands.
| | - Roman Truckenmüller
- MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands.
| | - Stefan Giselbrecht
- MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands.
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7
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Jung N, Moreth T, Stelzer EHK, Pampaloni F, Windbergs M. Non-invasive analysis of pancreas organoids in synthetic hydrogels defines material-cell interactions and luminal composition. Biomater Sci 2021; 9:5415-5426. [PMID: 34318785 DOI: 10.1039/d1bm00597a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The cultivation of cells forming three-dimensional structures like organoids holds great potential in different fields of life sciences and is gaining increasing interest with regards to clinical applications and personalised medicine. However, conventional hydrogels used as cell cultivation matrices (e.g. Matrigel®) contain animal-derived components in varying quantities, implicating low reproducibility of experiments and limited applicability for clinical use. Based on the strong need for developing novel, well defined, and animal-free hydrogels for 3D cell cultures, this study presents a comprehensive analysis of pancreas organoid cultivation in two synthetic hydrogels. Besides established visualisation techniques to monitor organoid formation and growth, confocal Raman microscopy was used for the first time to evaluate the gel matrices and organoid formation within the gels. The approach revealed so far not accessible information about material-cell interactions and the composition of the organoid lumen in a non-invasive and label-free manner. Confocal Raman microscopy thereby enabled a systematic characterisation of different hydrogels with respect to cell culture compatibility and allowed for the rational selection of a hydrogel formulation to serve as a synthetic and fully defined alternative to animal-derived cultivation matrices.
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Affiliation(s)
- Nathalie Jung
- Institute of Pharmaceutical Technology and Buchmann Institute for Molecular Life Sciences, Goethe-University, Frankfurt am Main, Germany.
| | - Till Moreth
- Buchmann Institute for Molecular Life Sciences, Goethe-University, Frankfurt am Main, Germany
| | - Ernst H K Stelzer
- Buchmann Institute for Molecular Life Sciences, Goethe-University, Frankfurt am Main, Germany
| | - Francesco Pampaloni
- Buchmann Institute for Molecular Life Sciences, Goethe-University, Frankfurt am Main, Germany
| | - Maike Windbergs
- Institute of Pharmaceutical Technology and Buchmann Institute for Molecular Life Sciences, Goethe-University, Frankfurt am Main, Germany.
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Hof L, Moreth T, Koch M, Liebisch T, Kurtz M, Tarnick J, Lissek SM, Verstegen MMA, van der Laan LJW, Huch M, Matthäus F, Stelzer EHK, Pampaloni F. Long-term live imaging and multiscale analysis identify heterogeneity and core principles of epithelial organoid morphogenesis. BMC Biol 2021; 19:37. [PMID: 33627108 PMCID: PMC7903752 DOI: 10.1186/s12915-021-00958-w] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 01/12/2021] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Organoids are morphologically heterogeneous three-dimensional cell culture systems and serve as an ideal model for understanding the principles of collective cell behaviour in mammalian organs during development, homeostasis, regeneration, and pathogenesis. To investigate the underlying cell organisation principles of organoids, we imaged hundreds of pancreas and cholangiocarcinoma organoids in parallel using light sheet and bright-field microscopy for up to 7 days. RESULTS We quantified organoid behaviour at single-cell (microscale), individual-organoid (mesoscale), and entire-culture (macroscale) levels. At single-cell resolution, we monitored formation, monolayer polarisation, and degeneration and identified diverse behaviours, including lumen expansion and decline (size oscillation), migration, rotation, and multi-organoid fusion. Detailed individual organoid quantifications lead to a mechanical 3D agent-based model. A derived scaling law and simulations support the hypotheses that size oscillations depend on organoid properties and cell division dynamics, which is confirmed by bright-field microscopy analysis of entire cultures. CONCLUSION Our multiscale analysis provides a systematic picture of the diversity of cell organisation in organoids by identifying and quantifying the core regulatory principles of organoid morphogenesis.
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Affiliation(s)
- Lotta Hof
- Physical Biology Group, Buchmann Institute for Molecular Life Sciences (BMLS), Goethe-Universität Frankfurt am Main, Frankfurt am Main, Germany
| | - Till Moreth
- Physical Biology Group, Buchmann Institute for Molecular Life Sciences (BMLS), Goethe-Universität Frankfurt am Main, Frankfurt am Main, Germany
| | - Michael Koch
- Physical Biology Group, Buchmann Institute for Molecular Life Sciences (BMLS), Goethe-Universität Frankfurt am Main, Frankfurt am Main, Germany
| | - Tim Liebisch
- Frankfurt Institute for Advanced Studies and Faculty of Biological Sciences, Goethe-Universität Frankfurt am Main, Frankfurt am Main, Germany
| | - Marina Kurtz
- Department of Physics, Goethe Universität Frankfurt am Main, Frankfurt am Main, Germany
| | - Julia Tarnick
- Deanery of Biomedical Science, University of Edinburgh, Edinburgh, UK
| | - Susanna M Lissek
- Experimental Medicine and Therapy Research, University of Regensburg, Regensburg, Germany
| | - Monique M A Verstegen
- Department of Surgery, Erasmus MC - University Medical Center, Rotterdam, The Netherlands
| | - Luc J W van der Laan
- Department of Surgery, Erasmus MC - University Medical Center, Rotterdam, The Netherlands
| | - Meritxell Huch
- The Wellcome Trust/CRUK Gurdon Institute, University of Cambridge, Cambridge, UK
- Present address: Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
| | - Franziska Matthäus
- Frankfurt Institute for Advanced Studies and Faculty of Biological Sciences, Goethe-Universität Frankfurt am Main, Frankfurt am Main, Germany
| | - Ernst H K Stelzer
- Physical Biology Group, Buchmann Institute for Molecular Life Sciences (BMLS), Goethe-Universität Frankfurt am Main, Frankfurt am Main, Germany
| | - Francesco Pampaloni
- Physical Biology Group, Buchmann Institute for Molecular Life Sciences (BMLS), Goethe-Universität Frankfurt am Main, Frankfurt am Main, Germany.
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9
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p63 uses a switch-like mechanism to set the threshold for induction of apoptosis. Nat Chem Biol 2020; 16:1078-1086. [DOI: 10.1038/s41589-020-0600-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 06/25/2020] [Indexed: 12/19/2022]
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