Improved Doxorubicin Encapsulation and Pharmacokinetics of Ferritin-Fusion Protein Nanocarriers Bearing Proline, Serine, and Alanine Elements

Alessandro Arcovito, Massimiliano Papi, Elisabetta Falvo, Elisa Tremante, Nadav Elad, Alberto Boffi, Veronica Morea, Giamaica Conti, Giuseppe Toffoli, Giulio Fracasso, Patrizio Giacomini, Pierpaolo Ceci

Risultato della ricerca: Contributo in rivistaArticolo in rivista

63 Citazioni (Scopus)

Abstract

A novel human ferritin-based nanocarrier, composed of 24 modified monomers able to auto-assemble into a modified protein cage, was produced and used as selective carrier of anti-tumor payloads. Each modified monomer derives from the genetic fusion of two distinct modules, namely the heavy chain of human ferritin (HFt) and a stabilizing/protective PAS polypeptide sequence rich in proline (P), serine (S), and alanine (A) residues. Two genetically fused protein constructs containing PAS polymers with 40- and 75-residue lengths, respectively, were compared. They were produced and purified as recombinant proteins in Escherichia coli at high yields. Both preparations were highly soluble and stable in vitro as well as in mouse plasma. Size-exclusion chromatography, dynamic light scattering, and transmission electron microscopy results indicated that PASylated ferritins are fully assembled and highly monodispersed. In addition, yields and stability of encapsulated doxorubicin were significantly better for both HFt-PAS proteins than for wild-type HFt. Importantly, PAS sequences considerably prolonged the half-life of HFt in the mouse bloodstream. Finally, our doxorubicin-loaded nanocages preserved the pharmacological activity of the drug. Taken together, these results indicate that both of the developed HFt-PAS fusion proteins are promising nanocarriers for future applications in cancer therapy.
Lingua originaleEnglish
pagine (da-a)514-522
Numero di pagine9
RivistaBiomacromolecules
Volume17
DOI
Stato di pubblicazionePubblicato - 2016

Keywords

  • human Ferritin

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