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Sendo S, Kiosses WB, Yang S, Wu DJ, Lee DWK, Liu L, Aschner Y, Vela AJ, Downey GP, Santelli E, Bottini N. Clustering of phosphatase RPTPα promotes Src signaling and the arthritogenic action of synovial fibroblasts. Sci Signal 2023; 16:eabn8668. [PMID: 37402225 PMCID: PMC10544828 DOI: 10.1126/scisignal.abn8668] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2021] [Accepted: 06/15/2023] [Indexed: 07/06/2023]
Abstract
Receptor-type protein phosphatase α (RPTPα) promotes fibroblast-dependent arthritis and fibrosis, in part, by enhancing the activation of the kinase SRC. Synovial fibroblasts lining joint tissue mediate inflammation and tissue damage, and their infiltration into adjacent tissues promotes disease progression. RPTPα includes an ectodomain and two intracellular catalytic domains (D1 and D2) and, in cancer cells, undergoes inhibitory homodimerization, which is dependent on a D1 wedge motif. Through single-molecule localization and labeled molecule interaction microscopy of migrating synovial fibroblasts, we investigated the role of RPTPα dimerization in the activation of SRC, the migration of synovial fibroblasts, and joint damage in a mouse model of arthritis. RPTPα clustered with other RPTPα and with SRC molecules in the context of actin-rich structures. A known dimerization-impairing mutation in the wedge motif (P210L/P211L) and the deletion of the D2 domain reduced RPTPα-RPTPα clustering; however, it also unexpectedly reduced RPTPα-SRC association. The same mutations also reduced recruitment of RPTPα to actin-rich structures and inhibited SRC activation and cellular migration. An antibody against the RPTPα ectodomain that prevented the clustering of RPTPα also inhibited RPTPα-SRC association and SRC activation and attenuated fibroblast migration and joint damage in arthritic mice. A catalytically inactivating RPTPα-C469S mutation protected mice from arthritis and reduced SRC activation in synovial fibroblasts. We conclude that RPTPα clustering retains it to actin-rich structures to promote SRC-mediated fibroblast migration and can be modulated through the extracellular domain.
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Affiliation(s)
- Sho Sendo
- Dept. of Medicine, University of California San Diego, La Jolla, CA 92093
| | - William B. Kiosses
- Dept. of Medicine, University of California San Diego, La Jolla, CA 92093
- La Jolla Institute for Immunology, La Jolla, CA 92037
| | - Shen Yang
- Dept. of Medicine, University of California San Diego, La Jolla, CA 92093
| | - Dennis J. Wu
- Dept. of Medicine, University of California San Diego, La Jolla, CA 92093
| | - Daniel W. K. Lee
- Dept. of Medicine, University of California San Diego, La Jolla, CA 92093
| | - Lin Liu
- Dept. of Medicine, University of California San Diego, La Jolla, CA 92093
| | - Yael Aschner
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado, Aurora, Colorado
| | - Allison J. Vela
- Dept. of Medicine, University of California San Diego, La Jolla, CA 92093
| | - Gregory P. Downey
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, Colorado
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado, Aurora, Colorado
- Department of Biomedical Research, National Jewish Health, Denver, Colorado
- Department of Immunology and Microbiology, University of Colorado, Aurora, Colorado
- Department of Pediatrics, National Jewish Health, Denver, Colorado
| | - Eugenio Santelli
- Dept. of Medicine, University of California San Diego, La Jolla, CA 92093
| | - Nunzio Bottini
- Dept. of Medicine, University of California San Diego, La Jolla, CA 92093
- Department of Medicine, Kao Autoimmunity Institute, Cedars Sinai Medical Center, Los Angeles, CA, USA
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Johnson JL, Meneses-Salas E, Ramadass M, Monfregola J, Rahman F, Carvalho Gontijo R, Kiosses WB, Pestonjamasp K, Allen D, Zhang J, Osborne DG, Zhu YP, Wineinger N, Askari K, Chen D, Yu J, Henderson SC, Hedrick CC, Ursini MV, Grinstein S, Billadeau DD, Catz SD. Differential dysregulation of granule subsets in WASH-deficient neutrophil leukocytes resulting in inflammation. Nat Commun 2022; 13:5529. [PMID: 36130971 PMCID: PMC9492659 DOI: 10.1038/s41467-022-33230-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 09/08/2022] [Indexed: 11/09/2022] Open
Abstract
Dysregulated secretion in neutrophil leukocytes associates with human inflammatory disease. The exocytosis response to triggering stimuli is sequential; gelatinase granules modulate the initiation of the innate immune response, followed by the release of pro-inflammatory azurophilic granules, requiring stronger stimulation. Exocytosis requires actin depolymerization which is actively counteracted under non-stimulatory conditions. Here we show that the actin nucleator, WASH, is necessary to maintain azurophilic granules in their refractory state by granule actin entrapment and interference with the Rab27a-JFC1 exocytic machinery. On the contrary, gelatinase granules of WASH-deficient neutrophil leukocytes are characterized by decreased Rac1, shortened granule-associated actin comets and impaired exocytosis. Rac1 activation restores exocytosis of these granules. In vivo, WASH deficiency induces exacerbated azurophilic granule exocytosis, inflammation, and decreased survival. WASH deficiency thus differentially impacts neutrophil granule subtypes, impairing exocytosis of granules that mediate the initiation of the neutrophil innate response while exacerbating pro-inflammatory granule secretion.
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Affiliation(s)
- Jennifer L Johnson
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Elsa Meneses-Salas
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Mahalakshmi Ramadass
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Jlenia Monfregola
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
- Telethon Institute of Genetics and Medicine (TIGEM), Via Campi Flegrei 34, 80078, Pozzuoli, Naples, Italy
| | - Farhana Rahman
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | | | - William B Kiosses
- Division of Inflammation Biology, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Kersi Pestonjamasp
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Dale Allen
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Jinzhong Zhang
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Douglas G Osborne
- The Division of Oncology Research, Schulze Center for Novel Therapeutics, Mayo Clinic, Rochester, MN, USA
| | - Yanfang Peipei Zhu
- Division of Inflammation Biology, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Nathan Wineinger
- Research Translational Institute, Statistics, The Scripps Research Institute, La Jolla, CA, USA
| | - Kasra Askari
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Danni Chen
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Juan Yu
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Scott C Henderson
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Catherine C Hedrick
- Division of Inflammation Biology, La Jolla Institute for Immunology, La Jolla, CA, USA
| | | | - Sergio Grinstein
- Department of Biochemistry, University of Toronto, Toronto, ON, Canada
| | - Daniel D Billadeau
- The Division of Oncology Research, Schulze Center for Novel Therapeutics, Mayo Clinic, Rochester, MN, USA
| | - Sergio D Catz
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA.
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Johnson JL, Ramadass M, Rahman F, Meneses-Salas E, Zgajnar NR, Carvalho Gontijo R, Zhang J, Kiosses WB, Zhu YP, Hedrick CC, Perego M, Gunton JE, Pestonjamasp K, Napolitano G, Catz SD. The atypical small GTPase GEM/Kir is a negative regulator of the NADPH oxidase and NETs production through macroautophagy. J Leukoc Biol 2021; 110:629-649. [PMID: 34085299 DOI: 10.1002/jlb.2hi0421-123r] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Despite the important function of neutrophils in the eradication of infections and induction of inflammation, the molecular mechanisms regulating the activation and termination of the neutrophil immune response is not well understood. Here, the function of the small GTPase from the RGK family, Gem, is characterized as a negative regulator of the NADPH oxidase through autophagy regulation. Gem knockout (Gem KO) neutrophils show increased NADPH oxidase activation and increased production of extracellular and intracellular reactive oxygen species (ROS). Enhanced ROS production in Gem KO neutrophils was associated with increased NADPH oxidase complex-assembly as determined by quantitative super-resolution microscopy, but normal exocytosis of gelatinase and azurophilic granules. Gem-deficiency was associated with increased basal autophagosomes and autolysosome numbers but decreased autophagic flux under phorbol ester-induced conditions. Neutrophil stimulation triggered the localization of the NADPH oxidase subunits p22phox and p47phox at LC3-positive structures suggesting that the assembled NADPH oxidase complex is recruited to autophagosomes, which was significantly increased in Gem KO neutrophils. Prevention of new autophagosome formation by treatment with SAR405 increased ROS production while induction of autophagy by Torin-1 decreased ROS production in Gem KO neutrophils, and also in wild-type neutrophils, suggesting that macroautophagy contributes to the termination of NADPH oxidase activity. Autophagy inhibition decreased NETs formation independently of enhanced ROS production. NETs production, which was significantly increased in Gem-deficient neutrophils, was decreased by inhibition of both autophagy and calmodulin, a known GEM interactor. Intracellular ROS production was increased in Gem KO neutrophils challenged with live Gram-negative bacteria Pseudomonas aeruginosa or Salmonella Typhimurium, but phagocytosis was not affected in Gem-deficient cells. In vivo analysis in a model of Salmonella Typhimurium infection indicates that Gem-deficiency provides a genetic advantage manifested as a moderate increased in survival to infections. Altogether, the data suggest that Gem-deficiency leads to the enhancement of the neutrophil innate immune response by increasing NADPH oxidase assembly and NETs production and that macroautophagy differentially regulates ROS and NETs in neutrophils.
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Affiliation(s)
- Jennifer L Johnson
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, California, USA
| | - Mahalakshmi Ramadass
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, California, USA
| | - Farhana Rahman
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, California, USA
| | - Elsa Meneses-Salas
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, California, USA
| | - Nadia R Zgajnar
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, California, USA
| | | | - Jinzhong Zhang
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, California, USA
| | - William B Kiosses
- Center for Diabetes, Obesity, and Endocrinology (CDOE), The Westmead Institute for Medical Research (WIMR), The University of Sydney, Sydney, NSW, Australia
| | - Yanfang Peipei Zhu
- Division of Inflammation Biology, La Jolla Institute for Allergy and Immunology, La Jolla, California, USA
| | - Catherine C Hedrick
- Division of Inflammation Biology, La Jolla Institute for Allergy and Immunology, La Jolla, California, USA
| | - Marta Perego
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, California, USA
| | - Jenny E Gunton
- Center for Diabetes, Obesity, and Endocrinology (CDOE), The Westmead Institute for Medical Research (WIMR), The University of Sydney, Sydney, NSW, Australia
| | - Kersi Pestonjamasp
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, California, USA
| | | | - Sergio D Catz
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, California, USA
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