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Ward KE, Sengupta R, Ropa JP, Amiar S, Stahelin RV. The Cytosolic Phospholipase A 2α N-terminal C2 Domain Binds and Oligomerizes on Membranes with Positive Curvature. Biomolecules 2020; 10:biom10040647. [PMID: 32331436 PMCID: PMC7226022 DOI: 10.3390/biom10040647] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 04/16/2020] [Accepted: 04/19/2020] [Indexed: 01/04/2023] Open
Abstract
Group IV phospholipase A2α (cPLA2α) regulates the production of prostaglandins and leukotrienes via the formation of arachidonic acid from membrane phospholipids. The targeting and membrane binding of cPLA2α to the Golgi involves the N-terminal C2 domain, whereas the catalytic domain produces arachidonic acid. Although most studies of cPLA2α concern its catalytic activity, it is also linked to homeostatic processes involving the generation of vesicles that traffic material from the Golgi to the plasma membrane. Here we investigated how membrane curvature influences the homeostatic role of cPLA2α in vesicular trafficking. The cPLA2α C2 domain is known to induce changes in positive membrane curvature, a process which is dependent on cPLA2α membrane penetration. We showed that cPLA2α undergoes C2 domain-dependent oligomerization on membranes in vitro and in cells. We found that the association of the cPLA2α C2 domain with membranes is limited to membranes with positive curvature, and enhanced C2 domain oligomerization was observed on vesicles ~50 nm in diameter. We demonstrated that the cPLA2α C2 domain localizes to cholesterol enriched Golgi-derived vesicles independently of cPLA2α catalytic activity. Moreover, we demonstrate the C2 domain selectively localizes to lipid droplets whereas the full-length enzyme to a much lesser extent. Our results therefore provide novel insight into the molecular forces that mediate C2 domain-dependent membrane localization in vitro and in cells.
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Affiliation(s)
- Katherine E. Ward
- Department of Chemistry and Biochemistry, University of Notre Dame, South Bend, IN 46556, USA; (K.E.W.); (J.P.R.)
| | - Ranjan Sengupta
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN 47906, USA; (R.S.); (S.A.)
| | - James P. Ropa
- Department of Chemistry and Biochemistry, University of Notre Dame, South Bend, IN 46556, USA; (K.E.W.); (J.P.R.)
| | - Souad Amiar
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN 47906, USA; (R.S.); (S.A.)
| | - Robert V. Stahelin
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN 47906, USA; (R.S.); (S.A.)
- Purdue Center for Cancer Research, Purdue University, West Lafayette, IN 47907, USA
- Correspondence: ; Tel.: +01-765-494-4152
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Gomes-da-Silva LC, Zhao L, Bezu L, Zhou H, Sauvat A, Liu P, Durand S, Leduc M, Souquere S, Loos F, Mondragón L, Sveinbjørnsson B, Rekdal Ø, Boncompain G, Perez F, Arnaut LG, Kepp O, Kroemer G. Photodynamic therapy with redaporfin targets the endoplasmic reticulum and Golgi apparatus. EMBO J 2018; 37:embj.201798354. [PMID: 29807932 DOI: 10.15252/embj.201798354] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 04/23/2018] [Accepted: 04/25/2018] [Indexed: 12/14/2022] Open
Abstract
Preclinical evidence depicts the capacity of redaporfin (Redp) to act as potent photosensitizer, causing direct antineoplastic effects as well as indirect immune-dependent destruction of malignant lesions. Here, we investigated the mechanisms through which photodynamic therapy (PDT) with redaporfin kills cancer cells. Subcellular localization and fractionation studies based on the physicochemical properties of redaporfin revealed its selective tropism for the endoplasmic reticulum (ER) and the Golgi apparatus (GA). When activated, redaporfin caused rapid reactive oxygen species-dependent perturbation of ER/GA compartments, coupled to ER stress and an inhibition of the GA-dependent secretory pathway. This led to a general inhibition of protein secretion by PDT-treated cancer cells. The ER/GA play a role upstream of mitochondria in the lethal signaling pathway triggered by redaporfin-based PDT Pharmacological perturbation of GA function or homeostasis reduces mitochondrial permeabilization. In contrast, removal of the pro-apoptotic multidomain proteins BAX and BAK or pretreatment with protease inhibitors reduced cell killing, yet left the GA perturbation unaffected. Altogether, these results point to the capacity of redaporfin to kill tumor cells via destroying ER/GA function.
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Affiliation(s)
- Lígia C Gomes-da-Silva
- Chemistry Department, University of Coimbra, Coimbra, Portugal.,Faculty of Medicine, University of Paris Sud, Kremlin-Bicêtre, France.,Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France.,Institut National de la Santé et de la Recherche Médicale UMR1138, Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France
| | - Liwei Zhao
- Faculty of Medicine, University of Paris Sud, Kremlin-Bicêtre, France.,Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France.,Institut National de la Santé et de la Recherche Médicale UMR1138, Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France
| | - Lucillia Bezu
- Faculty of Medicine, University of Paris Sud, Kremlin-Bicêtre, France.,Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France.,Institut National de la Santé et de la Recherche Médicale UMR1138, Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France
| | - Heng Zhou
- Faculty of Medicine, University of Paris Sud, Kremlin-Bicêtre, France.,Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France.,Institut National de la Santé et de la Recherche Médicale UMR1138, Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France
| | - Allan Sauvat
- Faculty of Medicine, University of Paris Sud, Kremlin-Bicêtre, France.,Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France.,Institut National de la Santé et de la Recherche Médicale UMR1138, Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France
| | - Peng Liu
- Faculty of Medicine, University of Paris Sud, Kremlin-Bicêtre, France.,Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France.,Institut National de la Santé et de la Recherche Médicale UMR1138, Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France
| | - Sylvère Durand
- Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France.,Institut National de la Santé et de la Recherche Médicale UMR1138, Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France
| | - Marion Leduc
- Faculty of Medicine, University of Paris Sud, Kremlin-Bicêtre, France.,Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France.,Institut National de la Santé et de la Recherche Médicale UMR1138, Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France
| | - Sylvie Souquere
- Gustave Roussy Comprehensive Cancer Center, Villejuif, France.,CNRS, UMR9196, Villejuif, France
| | - Friedemann Loos
- Faculty of Medicine, University of Paris Sud, Kremlin-Bicêtre, France.,Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France.,Institut National de la Santé et de la Recherche Médicale UMR1138, Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France
| | - Laura Mondragón
- Faculty of Medicine, University of Paris Sud, Kremlin-Bicêtre, France.,Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France.,Institut National de la Santé et de la Recherche Médicale UMR1138, Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France
| | - Baldur Sveinbjørnsson
- Lytix Biopharma AS, Oslo, Norway.,Institute of Medical Biology, University of Tromsø, Tromsø, Norway
| | - Øystein Rekdal
- Lytix Biopharma AS, Oslo, Norway.,Institute of Medical Biology, University of Tromsø, Tromsø, Norway
| | - Gaelle Boncompain
- Department of Subcellular Structure and Cellular Dynamics, CNRS, Institut Curie, PSL Research University, Paris, France
| | - Franck Perez
- Department of Subcellular Structure and Cellular Dynamics, CNRS, Institut Curie, PSL Research University, Paris, France
| | - Luis G Arnaut
- Chemistry Department, University of Coimbra, Coimbra, Portugal
| | - Oliver Kepp
- Faculty of Medicine, University of Paris Sud, Kremlin-Bicêtre, France .,Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France.,Institut National de la Santé et de la Recherche Médicale UMR1138, Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France
| | - Guido Kroemer
- Faculty of Medicine, University of Paris Sud, Kremlin-Bicêtre, France .,Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France.,Institut National de la Santé et de la Recherche Médicale UMR1138, Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France.,Sorbonne Paris Cité, Université Paris Descartes, Paris, France.,Université Pierre et Marie Curie, Paris, France.,Pôle de Biologie, Hôpital Européen Georges Pompidou, APsupp-HP, Paris, France.,Department of Women's and Children's Health, Karolinska University Hospital, Stockholm, Sweden
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