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Wang L, Shi S, Unterreiner A, Kapetanovic R, Ghosh S, Sanchez J, Aslani S, Xiong Y, Hsu CL, Donovan KA, Farady CJ, Fischer ES, Bornancin F, Matthias P. HDAC6/aggresome processing pathway importance for inflammasome formation is context-dependent. J Biol Chem 2024; 300:105638. [PMID: 38199570 PMCID: PMC10850954 DOI: 10.1016/j.jbc.2024.105638] [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: 08/21/2023] [Revised: 12/19/2023] [Accepted: 12/31/2023] [Indexed: 01/12/2024] Open
Abstract
The inflammasome is a large multiprotein complex that assembles in the cell cytoplasm in response to stress or pathogenic infection. Its primary function is to defend the cell and promote the secretion of pro-inflammatory cytokines, including IL-1β and IL-18. Previous research has shown that in immortalized bone marrow-derived macrophages (iBMDMs) inflammasome assembly is dependent on the deacetylase HDAC6 and the aggresome processing pathway (APP), a cellular pathway involved in the disposal of misfolded proteins. Here we used primary BMDMs from mice in which HDAC6 is ablated or impaired and found that inflammasome activation was largely normal. We also used human peripheral blood mononuclear cells and monocyte cell lines expressing a synthetic protein blocking the HDAC6-ubiquitin interaction and impairing the APP and found that inflammasome activation was moderately affected. Finally, we used a novel HDAC6 degrader and showed that inflammasome activation was partially impaired in human macrophage cell lines with depleted HDAC6. Our results therefore show that HDAC6 importance in inflammasome activation is context-dependent.
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Affiliation(s)
- Longlong Wang
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland.
| | - Shihua Shi
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland
| | | | - Ronan Kapetanovic
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland
| | - Sucheta Ghosh
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland; Faculty of Sciences, University of Basel, Basel, Switzerland
| | - Jacint Sanchez
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland
| | - Selma Aslani
- Novartis Institutes for Biomedical Research, Basel, Switzerland
| | - Yuan Xiong
- Department of Cancer Biology, Dana Farber Cancer Institute, Boston, Massachusetts, USA; Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts, USA
| | - Chi-Lin Hsu
- Department of Cancer Biology, Dana Farber Cancer Institute, Boston, Massachusetts, USA; Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts, USA
| | - Katherine A Donovan
- Department of Cancer Biology, Dana Farber Cancer Institute, Boston, Massachusetts, USA; Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts, USA
| | | | - Eric S Fischer
- Department of Cancer Biology, Dana Farber Cancer Institute, Boston, Massachusetts, USA; Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts, USA
| | | | - Patrick Matthias
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland; Faculty of Sciences, University of Basel, Basel, Switzerland.
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Dhyani V, Chann AS, Giri L, Russell SM, Charnley M. A Pipeline for Dynamic Analysis of Mitochondrial Content in Developing T Cells: Bridging the Gap Between High-Throughput Flow Cytometry and Single-Cell Microscopy Analysis. Methods Mol Biol 2024; 2800:167-187. [PMID: 38709484 DOI: 10.1007/978-1-0716-3834-7_12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/07/2024]
Abstract
Analyzing the dynamics of mitochondrial content in developing T cells is crucial for understanding the metabolic state during T cell development. However, monitoring mitochondrial content in real-time needs a balance of cell viability and image resolution. In this chapter, we present experimental protocols for measuring mitochondrial content in developing T cells using three modalities: bulk analysis via flow cytometry, volumetric imaging in laser scanning confocal microscopy, and dynamic live-cell monitoring in spinning disc confocal microscopy. Next, we provide an image segmentation and centroid tracking-based analysis pipeline for automated quantification of a large number of microscopy images. These protocols together offer comprehensive approaches to investigate mitochondrial dynamics in developing T cells, enabling a deeper understanding of their metabolic processes.
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Affiliation(s)
- Vaibhav Dhyani
- Bioimaging and Data Analysis Lab, Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Sangareddy, Telangana, India
- Optical Science Centre, Faculty of Science, Engineering & Technology, Swinburne University of Technology, Hawthorn, Australia
| | - Anchi S Chann
- Optical Science Centre, Faculty of Science, Engineering & Technology, Swinburne University of Technology, Hawthorn, Australia
- Immune Signalling Laboratory, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
- Department of Immunology, Mayo Clinic, Scottsdale, AZ, USA
| | - Lopamudra Giri
- Bioimaging and Data Analysis Lab, Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Sangareddy, Telangana, India
| | - Sarah M Russell
- Optical Science Centre, Faculty of Science, Engineering & Technology, Swinburne University of Technology, Hawthorn, Australia.
- Immune Signalling Laboratory, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne, VIC, Australia.
| | - Mirren Charnley
- Optical Science Centre, Faculty of Science, Engineering & Technology, Swinburne University of Technology, Hawthorn, Australia.
- Immune Signalling Laboratory, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.
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Wang L, Unterreiner A, Kapetanovic R, Aslani S, Xiong Y, Donovan KA, Farady CJ, Fischer ES, Bornancin F, Matthias P. HDAC6/aggresome processing pathway importance for inflammasome formation is context dependent. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.15.553363. [PMID: 37645730 PMCID: PMC10461986 DOI: 10.1101/2023.08.15.553363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
The inflammasome is a large multiprotein complex that assembles in the cell cytoplasm in response to stress or pathogenic infection. Its primary function is to defend the cell and promote the secretion of pro-inflammatory cytokines, including IL-1β and IL-18. It was shown that in immortalized bone marrow derived macrophages (iBMDMs) inflammasome assembly is dependent on the deacetylase HDAC6 and the aggresome processing pathway (APP), a cellular pathway involved in the disposal of misfolded proteins. Here we used primary BMDMs from mice in which HDAC6 is ablated or impaired and found that inflammasome activation was largely normal. We also used human peripheral blood mononuclear cells and monocytes cell lines expressing a synthetic protein blocking HDAC6-ubiquitin interaction and impairing the APP and found that inflammasome activation was moderately affected. Finally, we used a novel HDAC6 degrader and showed that inflammasome activation was partially impaired in human macrophage cell lines with depleted HDAC6. Our results therefore show that HDAC6 importance in inflammasome activation is context dependent.
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Affiliation(s)
- Longlong Wang
- Friedrich Miescher Institute for Biomedical Research, 4058 Basel, Switzerland
| | | | - Ronan Kapetanovic
- Friedrich Miescher Institute for Biomedical Research, 4058 Basel, Switzerland
| | - Selma Aslani
- Novartis Institutes for Biomedical Research, 4056 Basel Switzerland
| | - Yuan Xiong
- Department of Cancer Biology, Dana Farber Cancer Institute, Boston, MA 02215, United States
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, United States
| | - Katherine A Donovan
- Department of Cancer Biology, Dana Farber Cancer Institute, Boston, MA 02215, United States
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, United States
| | | | - Eric S Fischer
- Department of Cancer Biology, Dana Farber Cancer Institute, Boston, MA 02215, United States
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, United States
| | | | - Patrick Matthias
- Friedrich Miescher Institute for Biomedical Research, 4058 Basel, Switzerland
- Faculty of Sciences, University of Basel, 4031 Basel, Switzerland
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