“…To date, nanoparticle physiochemical parameters are known to crucially affect protein corona include size 2 , 37 – 39 , shape 37 , 40 , and surface chemistry 21 , 25 , 28 , 39 (including surface hydrophobicity 21 , charge 39 , density of surface-conjugated PEG 25 ). Nevertheless, no report to our best knowledge has systematically examined the effects of nanoparticle elasticity on protein corona, despite that nanoparticle elasticity is crucial in nanoparticle’s physiological fate (both in vitro 8 , 9 , 11 – 13 and in vivo 8 , 14 – 19 ) and that protein corona formation on nanoparticles of differing elasticity may lead to different changes in nanoparticle size —protein corona formation on hard nanoparticles is manifested as an increase in particle mean diameter 20 , 22 , 33 , 41 whereas that on liposomes (known to be elastic and soft) can lead to either an increase 26 or reduction 24 , 26 in liposome mean diameter—and can result in different surface coverages of some protein family groups 42 .…”