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Pàgina inicial > Articles > Articles publicats > Identification of HIV-1-Based Virus-like Particles by Multifrequency Atomic Force Microscopy |
Data: | 2016 |
Resum: | Virus-like particles (VLPs) have become a promising platform for vaccine production. VLPs are formed by structural viral proteins that inherently self-assemble when expressed in a host cell. They represent a highly immunogenic and safe vaccine platform, due to the absence of the viral genome and its high protein density. One of the most important parameters in vaccine production is the quality of the product. A related bottleneck in VLP-based products is the presence of cellular vesicles as a major contaminant in the preparations, which will require the set up of techniques allowing for specific discrimination of VLPs from host vesicular bodies. In this work novel, to our knowledge, multifrequency (MF) atomic force microscopy (AFM) has permitted full structural nanophysical characterization by its access to the virus capsid of the HIV-based VLPs. The assessment of these particles by advanced amplitude modulation-frequency modulation (AM-FM) viscoelastic mapping mode has enhanced the imaging resolution of their nanomechanical properties, opening a new window for the study of the biophysical attributes of VLPs. Finally, the identification and differentiation of HIV-based VLPs from cellular vesicles has been performed under ambient conditions, providing, to our knowledge, novel methodology for the monitoring and quality control of VLPs. |
Ajuts: | Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-1216 Ministerio de Economía y Competitividad FIS2013-48668-C2-1-P Ministerio de Ciencia e Innovación RYC-2010-06365 Ministerio de Economía y Competitividad SEV-2013-0295 Ministerio de Economía y Competitividad BIO2011-2330 |
Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió acceptada per publicar |
Matèria: | Capsid Proteins ; Elasticity ; Gag Gene Products ; Human Immunodeficiency Virus ; HEK293 Cells ; HIV-1 ; Humans ; Microscopy, Atomic Force ; Microscopy, Electron, Scanning ; Microscopy, Electron, Transmission ; Vaccines, Virus-Like Particle ; Viscosity |
Publicat a: | Biophysical Journal, Vol. 111, Núm. 6 (September 2016) , p. 1173-1179, ISSN 1542-0086 |
Post-print 12 p, 1.2 MB |