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Pàgina inicial > Articles > Articles publicats > Paradoxical cell targeting of calreticulin-empowered, protein-only nanoparticles |
Data: | 2024 |
Resum: | Surface-exposed calreticulin (CRT) serves as a crucial cell damage-associated molecular pattern for immunogenic apoptosis, by generating an "eat me" signal to macrophages. Aiming at precision immunotherapies we intended to artificially label tumoral cells in vivo with a recombinant CRT, in a targeted way. For that, we have constructed a CRT fusion protein intended to surface attach CXCR4 cancer cells, to stimulate their immunological destruction. As a targeting ligand of the CRT construct and to drive its specific cell adhesion, we used the peptide V1, a derivative of the vMIP-II cytokine and an antagonist of CXCR4. The modular protein tends to self-assemble as regular 16 nm nanoparticles, assisted by ionic Zn. Through both in vivo and in vitro experiments, we have determined that CRT itself confers cell targeting capabilities to the construct overcoming those of V1, that are only moderate. In particular, CRT binds HeLa cells in absence of further internalization, by a route fully independent of CXCR4. Furthermore, by cytometry in THP-1 cells, we observed that the binding of the protein is preferential for dead cells over live cells, a fact that cannot be associated to a mere artefactual adsorption. These data are discussed in the context of the oligomerizing properties of CRT and the potential clinical applicability of proteins and protein materials functionalized with this novel cell surface ligand. |
Ajuts: | Agencia Estatal de Investigación PID2022-136845OB-I00 Agencia Estatal de Investigación PID2020-116174RB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca SGR/2021-00092 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-01140 Instituto de Salud Carlos III PI20/00400 Instituto de Salud Carlos III PI23/00318 Instituto de Salud Carlos III PI21/00150 Ministerio de Sanidad y Consumo CB06/01/0014 Ministerio de Sanidad y Consumo CB06/01/1031 Ministerio de Ciencia, Innovación y Universidades FPU18/04615 Instituto de Salud Carlos III CP19/00028 |
Nota: | Altres ajuts: acords transformatius de la UAB |
Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió publicada |
Matèria: | Recombinant proteins ; Protein materials ; Nanoparticles ; Drug delivery ; Cell targeting |
Publicat a: | European Journal of Pharmaceutics and Biopharmaceutics, Vol. 202 (September 2024) , art. 114410, ISSN 1873-3441 |
9 p, 5.3 MB |