Release of targeted protein nanoparticles from functional bacterial amyloids: A death star-like approach

Ugutz Unzueta, María Virtudes Cespedes, Rita Sala, Patricia Alamo, Alejandro Sánchez-Chardi, Mireia Pesarrodona, Laura Sánchez-García, Olivia Cano-Garrido, Antonio Villaverde, Esther Vázquez, Ramón Mangues, Joaquin Seras-Franzoso

Research output: Contribution to journalArticleResearchpeer-review

28 Citations (Scopus)


© 2018 Elsevier B.V. Sustained release of drug delivery systems (DDS) has the capacity to increase cancer treatment efficiency in terms of drug dosage reduction and subsequent decrease of deleterious side effects. In this regard, many biomaterials are being investigated but none offers morphometric and functional plasticity and versatility comparable to protein-based nanoparticles (pNPs). Here we describe a new DDS by which pNPs are fabricated as bacterial inclusion bodies (IB), that can be easily isolated, subcutaneously injected and used as reservoirs for the sustained release of targeted pNPs. Our approach combines the high performance of pNP, regarding specific cell targeting and biodistribution with the IB supramolecular organization, stability and cost effectiveness. This renders a platform able to provide a sustained source of CXCR4-targeted pNPs that selectively accumulate in tumor cells in a CXCR4 + colorectal cancer xenograft model. In addition, the proposed system could be potentially adapted to any other protein construct offering a plethora of possible new therapeutic applications in nanomedicine.
Original languageEnglish
Pages (from-to)29-39
JournalJournal of Controlled Release
Publication statusPublished - 10 Jun 2018


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