|
1
|
Tiryaki E, Álvarez-Leirós C, Majcherkiewicz JN, Chariou PL, Maceira-Campos M, Bodelón G, Steinmetz NF, Salgueiriño V. Magnetically Induced Thermal Effects on Tobacco Mosaic Virus-Based Nanocomposites for a Programmed Disassembly of Protein Cages. ACS APPLIED BIO MATERIALS 2024; 7:4804-4814. [PMID: 38934736 PMCID: PMC11253087 DOI: 10.1021/acsabm.4c00634] [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: 05/08/2024] [Revised: 06/19/2024] [Accepted: 06/19/2024] [Indexed: 06/28/2024]
Abstract
Protein cages are promising tools for the controlled delivery of therapeutics and imaging agents when endowed with programmable disassembly strategies. Here, we produced hybrid nanocomposites made of tobacco mosaic virus (TMV) and magnetic iron oxide nanoparticles (IONPs), designed to disrupt the viral protein cages using magnetically induced release of heat. We studied the effects of this magnetic hyperthermia on the programmable viral protein capsid disassembly using (1) elongated nanocomposites of TMV coated heterogeneously with magnetic iron oxide nanoparticles (TMV@IONPs) and (2) spherical nanocomposites of polystyrene (PS) on which we deposited presynthesized IONPs and TMV via layer-by-layer self-assembly (PS@IONPs/TMV). Notably, we found that the extent of the disassembly of the protein cages is contingent upon the specific absorption rate (SAR) of the magnetic nanoparticles, that is, the heating efficiency, and the relative position of the protein cage within the nanocomposite concerning the heating sources. This implies that the spatial arrangement of components within the hybrid nanostructure has a significant impact on the disassembly process. Understanding and optimizing this relationship will contribute to the critical spatiotemporal control for targeted drug and gene delivery using protein cages.
Collapse
Affiliation(s)
| | | | | | - Paul L. Chariou
- Department
of Bioengineering, University of California
San Diego, La Jolla, California 92093, United States
| | | | - Gustavo Bodelón
- CINBIO, Universidade de Vigo, Vigo 36310, Spain
- Departamento
de Biología Funcional y Ciencias de la Salud, Universidade de Vigo, Vigo 36310, Spain
| | - Nicole F. Steinmetz
- Department
of Bioengineering, University of California
San Diego, La Jolla, California 92093, United States
- Department
of NanoEngineering, University of California
San Diego, La Jolla, California 92093, United States
- Department
of Radiology, University of California San
Diego, La Jolla, California92093, United States
- Center for
Nano-ImmunoEngineering, University of California
San Diego, La Jolla, California92093, United States
- Institute
for Materials Discovery and Design, University
of California San Diego, La Jolla, California92093, United States
| | - Verónica Salgueiriño
- CINBIO, Universidade de Vigo, Vigo 36310, Spain
- Departamento
de Física Aplicada, Universidade
de Vigo, Vigo 36310, Spain
| |
Collapse
|
|
2
|
Gee M, Atai K, Coller HA, Yeates TO, Castells-Graells R. Designed fluorescent protein cages as fiducial markers for targeted cell imaging. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.02.28.582585. [PMID: 38464160 PMCID: PMC10925312 DOI: 10.1101/2024.02.28.582585] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
Understanding how proteins function within their cellular environments is essential for cellular biology and biomedical research. However, current imaging techniques exhibit limitations, particularly in the study of small complexes and individual proteins within cells. Previously, protein cages have been employed as imaging scaffolds to study purified small proteins using cryo-electron microscopy (cryo-EM). Here we demonstrate an approach to deliver designed protein cages - endowed with fluorescence and targeted binding properties - into cells, thereby serving as fiducial markers for cellular imaging. We used protein cages with anti-GFP DARPin domains to target a mitochondrial protein (MFN1) expressed in mammalian cells, which was genetically fused to GFP. We demonstrate that the protein cages can penetrate cells, are directed to specific subcellular locations, and are detectable with confocal microscopy. This innovation represents a milestone in developing tools for in-depth cellular exploration, especially in conjunction with methods such as cryo-correlative light and electron microscopy (cryo-CLEM).
Collapse
Affiliation(s)
- Morgan Gee
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, USA 90095
| | - Kaiser Atai
- Molecular Biology Interdepartmental Doctoral Program, University of California, Los Angeles, Los Angeles, CA, USA 90095
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, USA 90095
- Department of Biological Chemistry, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA 90095
| | - Hilary A Coller
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, USA 90095
- Department of Biological Chemistry, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA 90095
- Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, USA 90095
| | - Todd O Yeates
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, USA 90095
- Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, USA 90095
- UCLA-DOE Institute for Genomics and Proteomics, Los Angeles, CA, USA 90095
| | | |
Collapse
|