Abstract
Therapeutic options for osteosarcoma (OS) are still limited. Cold atmospheric plasma (CAP) leads to inhibition of tumor growth and metastasis, but underlying mechanisms are not fully understood. The aim of this study was to investigate CAP-induced changes in cytokine expression in OS cells. OS cell lines (U2-OS, MNNG/HOS) were treated with CAP and administered to an RT2 Profiler PCR Array (Qiagen, Hilden, Germany) detecting 84 chemokines, growth factors, TNF superfamily members, interleukins, and cytokines. The analyses showed that 15 factors (C5, CCL5, CNTF, CSF1, CSF3, CXCL1, IL-1A, IL-1B, IL-18, IL-22, IL23A, MSTN, NODAL, TGFβ2, THPO) were induced, but only one factor (VEGFA) was suppressed after CAP treatment. No extensive systemic cell response with presumably far-reaching consequences for neighboring cells was detectable after CAP treatment. Since the antitumoral effect of CAP on OS cells has already been demonstrated, intraoperative treatment with CAP represents a promising and systemic safe option for the therapy of OS.
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