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Moiseenko AV, Bagrov DV, Vorovitch MF, Uvarova VI, Veselov MM, Kashchenko AV, Ivanova AL, Osolodkin DI, Egorov AM, Ishmukhametov AA, Shaitan KV, Sokolova OS. Size Distribution of Inactivated Tick-Borne Encephalitis Virus Particles Revealed by a Comprehensive Physicochemical Approach. Biomedicines 2022; 10:biomedicines10102478. [PMID: 36289740 PMCID: PMC9598892 DOI: 10.3390/biomedicines10102478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/23/2022] [Accepted: 09/28/2022] [Indexed: 11/24/2022] Open
Abstract
Tick-borne encephalitis virus (TBEV) is an enveloped RNA virus, a member of the genus Flavivirus (family Flaviviridae). Here, we provide a detailed analysis of the size and structure of the inactivated TBEV vaccine strain Sofjin-Chumakov. Four analytical methods were used to analyze individual TBEV particles—negative staining TEM, cryo-EM, atomic force microscopy (AFM), and nanoparticle tracking analysis (NTA). All methods confirmed that the particles were monodisperse and that their mean size was ~50 nm. Cryo-EM data allowed us to obtain a 3D electron density model of the virus with clearly distinguishable E protein molecules. STEM-EELS analysis detected phosphorus in the particles, which was interpreted as an indicator of RNA presence. Altogether, the described analytical procedures can be valuable for the characterization of inactivated vaccine virus samples.
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Affiliation(s)
- Andrey V. Moiseenko
- Department of Biology, Lomonosov Moscow State University, Moscow 119234, Russia
| | - Dmitry V. Bagrov
- Department of Biology, Lomonosov Moscow State University, Moscow 119234, Russia
| | - Mikhail F. Vorovitch
- FSASI “Chumakov FSC R&D IBP RAS” (Institute of Poliomyelitis), Moscow 108819, Russia
- Institute of Translational Medicine and Biotechnology, Sechenov First Moscow State Medical University, Moscow 119991, Russia
| | - Victoria I. Uvarova
- FSASI “Chumakov FSC R&D IBP RAS” (Institute of Poliomyelitis), Moscow 108819, Russia
| | - Maxim M. Veselov
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119234, Russia
| | | | - Alla L. Ivanova
- FSASI “Chumakov FSC R&D IBP RAS” (Institute of Poliomyelitis), Moscow 108819, Russia
| | - Dmitry I. Osolodkin
- FSASI “Chumakov FSC R&D IBP RAS” (Institute of Poliomyelitis), Moscow 108819, Russia
- Institute of Translational Medicine and Biotechnology, Sechenov First Moscow State Medical University, Moscow 119991, Russia
| | - Alexey M. Egorov
- FSASI “Chumakov FSC R&D IBP RAS” (Institute of Poliomyelitis), Moscow 108819, Russia
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119234, Russia
| | - Aydar A. Ishmukhametov
- FSASI “Chumakov FSC R&D IBP RAS” (Institute of Poliomyelitis), Moscow 108819, Russia
- Institute of Translational Medicine and Biotechnology, Sechenov First Moscow State Medical University, Moscow 119991, Russia
| | | | - Olga S. Sokolova
- Faculty of Biology, MSU-BIT Shenzhen University, 1 International University Park Road, Dayun New Town, Longgang District, Shenzhen 518172, China
- Correspondence:
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