1
|
Grellet S, Tzelepi K, Roskamp M, Williams P, Sharif A, Slade-Carter R, Goldie P, Whilde N, Śmiałek MA, Mason NJ, Golding JP. Cancer-selective, single agent chemoradiosensitising gold nanoparticles. PLoS One 2017; 12:e0181103. [PMID: 28700660 PMCID: PMC5507319 DOI: 10.1371/journal.pone.0181103] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Accepted: 06/25/2017] [Indexed: 11/28/2022] Open
Abstract
Two nanometre gold nanoparticles (AuNPs), bearing sugar moieties and/or thiol-polyethylene glycol-amine (PEG-amine), were synthesised and evaluated for their in vitro toxicity and ability to radiosensitise cells with 220 kV and 6 MV X-rays, using four cell lines representing normal and cancerous skin and breast tissues. Acute 3 h exposure of cells to AuNPs, bearing PEG-amine only or a 50:50 ratio of alpha-galactose derivative and PEG-amine resulted in selective uptake and toxicity towards cancer cells at unprecedentedly low nanomolar concentrations. Chemotoxicity was prevented by co-administration of N-acetyl cysteine antioxidant, or partially prevented by the caspase inhibitor Z-VAD-FMK. In addition to their intrinsic cancer-selective chemotoxicity, these AuNPs acted as radiosensitisers in combination with 220 kV or 6 MV X-rays. The ability of AuNPs bearing simple ligands to act as cancer-selective chemoradiosensitisers at low concentrations is a novel discovery that holds great promise in developing low-cost cancer nanotherapeutics.
Collapse
Affiliation(s)
- Sophie Grellet
- School of Life, Health & Chemical Sciences, The Open University, Walton Hall, Milton Keynes, United Kingdom
| | - Konstantina Tzelepi
- School of Life, Health & Chemical Sciences, The Open University, Walton Hall, Milton Keynes, United Kingdom
| | - Meike Roskamp
- Midatech Pharma, Milton Park, Abingdon, United Kingdom
| | - Phil Williams
- Midatech Pharma, Milton Park, Abingdon, United Kingdom
| | - Aquila Sharif
- GenesisCare, Milton Keynes Medical Centre, Milton Keynes, United Kingdom
| | | | - Peter Goldie
- Radiotherapy Department, Northampton General Hospital NHS Trust, Northampton, United Kingdom
| | - Nicky Whilde
- Radiotherapy Department, Northampton General Hospital NHS Trust, Northampton, United Kingdom
| | - Małgorzata A. Śmiałek
- Department of Control and Power Engineering, Faculty of Ocean Engineering and Ship Technology, Gdansk University of Technology, Gdansk, Poland
- School of Physical Sciences, The Open University, Walton Hall, Milton Keynes, United Kingdom
| | - Nigel J. Mason
- School of Physical Sciences, The Open University, Walton Hall, Milton Keynes, United Kingdom
| | - Jon P. Golding
- School of Life, Health & Chemical Sciences, The Open University, Walton Hall, Milton Keynes, United Kingdom
- * E-mail:
| |
Collapse
|