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Yefimova S, Onishchenko A, Klochkov V, Myasoedov V, Kot Y, Tryfonyuk L, Knigavko O, Maksimchuk P, Kökbaş U, Kalashnyk-Vakulenko Y, Arkatov A, Khanzhyn V, Prokopyuk V, Vyshnytska I, Tkachenko A. Rare-earth orthovanadate nanoparticles trigger Ca 2+-dependent eryptosis. NANOTECHNOLOGY 2023; 34:205101. [PMID: 36780664 DOI: 10.1088/1361-6528/acbb7f] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 02/13/2023] [Indexed: 06/18/2023]
Abstract
Introduction. Rare-earth orthovanadate nanoparticles (ReVO4:Eu3+, Re = Gd, Y or La) are promising agents for photodynamic therapy of cancer due to their modifiable redox properties. However, their toxicity limits their application.Objective. The aim of this research was to elucidate pro-eryptotic effects of GdVO4:Eu3+and LaVO4:Eu3+nanoparticles with identification of underlying mechanisms of eryptosis induction and to determine their pharmacological potential in eryptosis-related diseases.Methods. Blood samples (n= 9) were incubated for 24 h with 0-10-20-40-80 mg l-1GdVO4:Eu3+or LaVO4:Eu3+nanoparticles, washed and used to prepare erythrocyte suspensions to analyze the cell membrane scrambling (annexin-V-FITC staining), cell shrinkage (forward scatter signaling), reactive oxygen species (ROS) generation through 2',7'-dichlorodihydrofluorescein diacetate (H2DCFDA) staining and intracellular Ca2+levels via FLUO4 AM staining by flow cytometry. Internalization of europium-enabled luminescent GdVO4:Eu3+and LaVO4:Eu3+nanoparticles was assessed by confocal laser scanning microscopy.Results.Both nanoparticles triggered eryptosis at concentrations of 80 mg l-1. ROS-mediated mechanisms were not involved in rare-earth orthovanadate nanoparticles-induced eryptosis. Elevated cytosolic Ca2+concentrations were revealed even at subtoxic concentrations of nanoparticles. LaVO4:Eu3+nanoparticles increased intracellular calcium levels in a more pronounced way compared with GdVO4:Eu3+nanoparticles. Our data disclose that the small-sized (15 nm) GdVO4:Eu3+nanoparticles were internalized after a 24 h incubation, while the large-sized (∼30 nm) LaVO4:Eu3+nanoparticles were localized preferentially around erythrocytes.Conclusions.Both internalized GdVO4:Eu3+and non-internalized LaVO4:Eu3+nanoparticles (80 mg l-1) promote eryptosis of erythrocytes after a 24 h exposurein vitrovia Ca2+signaling without involvement of oxidative stress. Eryptosis is a promising model for assessing nanotoxicity.
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Affiliation(s)
- Svetlana Yefimova
- Institute for Scintillation Materials, National Academy of Sciences of Ukraine, 60 Nauky ave, 61072 Kharkiv, Ukraine
| | - Anatolii Onishchenko
- Research Institute of Experimental and Clinical Medicine, Kharkiv National Medical University, 4 Nauky ave, 61022 Kharkiv, Ukraine
| | - Vladimir Klochkov
- Institute for Scintillation Materials, National Academy of Sciences of Ukraine, 60 Nauky ave, 61072 Kharkiv, Ukraine
| | - Valeriy Myasoedov
- Department of Medical Biology, Kharkiv National Medical University, 4 Nauky ave, 61022 Kharkiv, Ukraine
| | - Yurii Kot
- Department of Biochemistry, V.N. Karazin Kharkiv National University, 4 Svobody sq, 61022 Kharkiv , Ukraine
| | - Liliya Tryfonyuk
- Institute of Health, National University of Water and Environmental Engineering, 11 Soborna st,33000 Rivne, Ukraine
| | - Oleksandr Knigavko
- Department of Urology, Nephrology and Andrology, Kharkiv National Medical University, 195 Moskovsky ave, 61002 Kharkiv, Ukraine
| | - Pavel Maksimchuk
- Institute for Scintillation Materials, National Academy of Sciences of Ukraine, 60 Nauky ave, 61072 Kharkiv, Ukraine
| | - Umut Kökbaş
- Medical Biochemistry Department, Nevsehir Haci Bektas Veli University, 2000 Evler Mah. Zübeyde Hanım Cad. 50300 / Nevşehir, Turkey
| | - Yuliia Kalashnyk-Vakulenko
- Department of Otorhinolaryngology, Kharkiv National Medical University, 4 Nauky ave, 61022 Kharkiv, Ukraine
| | - Andrii Arkatov
- Department of Urology, Nephrology and Andrology, Kharkiv National Medical University, 195 Moskovsky ave, 61002 Kharkiv, Ukraine
| | - Vladyslav Khanzhyn
- Department of Urology, Nephrology and Andrology, Kharkiv National Medical University, 195 Moskovsky ave, 61002 Kharkiv, Ukraine
| | - Volodymyr Prokopyuk
- Department of Cryobiochemistry, Institute for Problems of Cryobiology and Cryomedicine of the National Academy of Sciences of Ukraine, 23 Pereyaslavskaya st, 61015 Kharkiv, Ukraine
| | - Iryna Vyshnytska
- Saint James School of Medicine, Albert Lake Drive, The Quarter, A-1 2640, Anguilla
| | - Anton Tkachenko
- Research Institute of Experimental and Clinical Medicine, Kharkiv National Medical University, 4 Nauky ave, 61022 Kharkiv, Ukraine
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20S proteasomes secreted by the malaria parasite promote its growth. Nat Commun 2021; 12:1172. [PMID: 33608523 PMCID: PMC7895969 DOI: 10.1038/s41467-021-21344-8] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 01/20/2021] [Indexed: 12/16/2022] Open
Abstract
Mature red blood cells (RBCs) lack internal organelles and canonical defense mechanisms, making them both a fascinating host cell, in general, and an intriguing choice for the deadly malaria parasite Plasmodium falciparum (Pf), in particular. Pf, while growing inside its natural host, the human RBC, secretes multipurpose extracellular vesicles (EVs), yet their influence on this essential host cell remains unknown. Here we demonstrate that Pf parasites, cultured in fresh human donor blood, secrete within such EVs assembled and functional 20S proteasome complexes (EV-20S). The EV-20S proteasomes modulate the mechanical properties of naïve human RBCs by remodeling their cytoskeletal network. Furthermore, we identify four degradation targets of the secreted 20S proteasome, the phosphorylated cytoskeletal proteins β-adducin, ankyrin-1, dematin and Epb4.1. Overall, our findings reveal a previously unknown 20S proteasome secretion mechanism employed by the human malaria parasite, which primes RBCs for parasite invasion by altering membrane stiffness, to facilitate malaria parasite growth. Plasmodium falciparum secretes extracellular vesicles (EVs) while growing inside red blood cells (RBCs). Here the authors show that these EVs contain assembled and functional 20S proteasome complexes that remodel the cytoskeleton of naïve human RBCs, priming the RBCs for parasite invasion.
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