Polymeric mechanical amplifiers of immune cytokine-mediated apoptosis

Michael J. Mitchell, Jamie Webster, Amanda Chung, Pedro P. G. Guimarães, Omar F. Khan and Robert Langer ()
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Michael J. Mitchell: David H. Koch Institute for Integrative Cancer Research, MIT
Jamie Webster: David H. Koch Institute for Integrative Cancer Research, MIT
Amanda Chung: David H. Koch Institute for Integrative Cancer Research, MIT
Pedro P. G. Guimarães: David H. Koch Institute for Integrative Cancer Research, MIT
Omar F. Khan: David H. Koch Institute for Integrative Cancer Research, MIT
Robert Langer: David H. Koch Institute for Integrative Cancer Research, MIT

Nature Communications, 2017, vol. 8, issue 1, 1-13

Abstract: Abstract Physical forces affect tumour growth, progression and metastasis. Here, we develop polymeric mechanical amplifiers that exploit in vitro and in vivo physical forces to increase immune cytokine-mediated tumour cell apoptosis. Mechanical amplifiers, consisting of biodegradable polymeric particles tethered to the tumour cell surface via polyethylene glycol linkers, increase the apoptotic effect of an immune cytokine on tumour cells under fluid shear exposure by as much as 50% compared with treatment under static conditions. We show that targeted polymeric particles delivered to tumour cells in vivo amplify the apoptotic effect of a subsequent treatment of immune cytokine, reduce circulating tumour cells in blood and overall tumour cell burden by over 90% and reduce solid tumour growth in combination with the antioxidant resveratrol. The work introduces a potentially new application for a broad range of micro- and nanoparticles to maximize receptor-mediated signalling and function in the presence of physical forces.

Date: 2017
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DOI: 10.1038/ncomms14179

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