Nasseri, BehzadTurk, MustafaKosemehmetoglu, KemalKaya, MuratPiskin, ErhanRabiee, NavidWebster, Thomas J.2021-01-142021-01-142020Nasseri, B., Türk, M., Kosemehmetoglu, K., Kaya, M., Piskin, E., Rabiee, N., Webster, TJ. The Pimpled Gold Nanosphere: A Superior Candidate for Plasmonic Photothermal Therapy. Int J Nanomedicine,15:2903-2920.1178-2013https://doi.org/10.2147/IJN.S248327https://hdl.handle.net/20.500.12587/12879Rabiee, Navid/0000-0002-6945-8541; Kosemehmetoglu, Kemal/0000-0002-7747-0460; Kaya, Murat/0000-0002-2458-8924Background: The development of highly efficient nanoparticles to convert light to heat for anti-cancer applications is quite a challenging field of research. Methods: In this study, we synthesized unique pimpled gold nanospheres (PGNSs) for plasmonic photothermal therapy (PPTT). The light-to-heat conversion capability of PGNSs and PPTT damage at the cellular level were investigated using a tissue phantom model. The ability of PGNSs to induce robust cellular damage was studied during cytotoxicity tests on colorectal adenocarcinoma (DLD-1) and fibroblast cell lines. Further, a numerical model of plasmonic (COMSOL Multiphysics) properties was used with the PPTT experimental assays. Results: A low cytotoxic effect of thiolated polyethylene glycol (SH-PEG400-SH-) was observed which improved the biocompatibility of PGNSs to maintain 89.4% cell viability during cytometry assays (in terms of fibroblast cells for 24 hrs at a concentration of 300 mu g/mL). The heat generated from the nanoparticle-mediated phantom models resulted in Delta T=30 degrees C, Delta T=23.1 degrees C and Delta T=21 degrees C for the PGNSs, AuNRs, and AuNPs, respectively (at a 300 mu g/mL concentration and for 325 sec). For the in vitro assays of PPTT on cancer cells, the PGNS group induced a 68.78% lethality (apoptosis) on DLD-1 cells. Fluorescence microscopy results showed the destruction of cell membranes and nuclei for the PPTT group. Experiments further revealed a penetration depth of sufficient PPTT damage in a physical tumor model after hematoxylin and eosin (H&E) staining through pathological studies (at depths of 2, 3 and 4 cm). Severe structural damages were observed in the tissue model through an 808-nm laser exposed to the PGNSs. Conclusion: Collectively, such results show much promise for the use of the present PGNSs and photothermal therapy for numerous anti-cancer applications.eninfo:eu-repo/semantics/openAccessplasmonicphotothermal therapygold nanoparticlescolorectal cellspathologyArticle152903292010.2147/IJN.S2483272-s2.0-8508397700932425523Q1WOS:000527880400001Q1