the synergistic effect of cold atmospheric plasma mediated gold nanoparticles conjugated with indocyanine green as an innovative approach to cooperation with radiotherapy

Objective:the multimodality treatment of cancer provides a secure and effective approach to improve the outcomeof treatments. cold atmospheric plasma (cap) has got attention because of selectively target and kills cancer cells.likewise, gold nanoparticles (gnp) have been introduced as a radiosensitizer and drug delivery with high efficacy andlow toxicity in cancer treatment. conjugating gnp with indocyanine green (icg) can develop a multifunctional drugto enhance radio and photosensitivity. the purpose of this study is to evaluate the anticancer effects of gnp@icg inradiotherapy (rt) and cap on dfw melanoma cancer and hff fibroblast normal cell lines.materials and methods:in this experimental study, the cells were irradiated to rt and cap, alone and in combinationwith or without gnp@icg at various time sequences between rt and cap. apoptosis annexin v/pi, mtt, and colonyformation assays evaluated the therapeutic effect. finally, the index of synergism was calculated to compare the results.results: most crucially, the cell viability assay showed that rt was less toxic to tumors and normal cells, but capshowed a significant anti-tumor effect on melanoma cells with selective toxicity. in addition, cold plasma sensitizedmelanoma cells to radiotherapy so increasing treatment efficiency. this effect is enhanced with gnp@icg. incomparison to rt alone, the data showed that combination treatment greatly decreased monolayer cell colonizationand boosted apoptotic induction.conclusion:the results provide new insights into the development of better approaches in radiotherapy of melanomacells assisted plasma and nanomedicine.