Issue 29, 2015

Intracellular delivery of BSA by phosphonate@silica nanoparticles

Abstract

Intracellular protein (BSA) delivery by a phosphonate@mesoporous silica nanoparticle vehicle, PMSN, with high load capacity for the relatively large test protein BSA, is described. Wide pore (11.6 nm) PMSN nanoparticles were synthesised and loaded with a BSA cargo to give BSA#@PMSN*, where # and * signify Fluorescein and Rhodamine fluorescent labels respectively. Internalisation of BSA#@PMSN*s by HeLa cells was analysed from confocal microscopy and TEM images after dose and time dependent treatments. No evidence of cytotoxicity was observed after 24 h and in contrast to PMSN* no significant loss of BSA#@PMSN* was observed after 3 h incubation of the loaded cells in DMEM. Receptor blocking experiments showed caveolar uptake of PMSN* and folate receptor mediated uptake of BSA#@PMSN*s.

Graphical abstract: Intracellular delivery of BSA by phosphonate@silica nanoparticles

Supplementary files

Article information

Article type
Paper
Submitted
26 mar 2015
Accepted
14 jun 2015
First published
29 jun 2015

J. Mater. Chem. B, 2015,3, 6057-6070

Intracellular delivery of BSA by phosphonate@silica nanoparticles

S. P. Maddala, G. Mastroianni, D. Velluto and A. C. Sullivan, J. Mater. Chem. B, 2015, 3, 6057 DOI: 10.1039/C5TB00555H

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