Journal
BIOMEDICINES
Volume 8, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/biomedicines8090357
Keywords
renal cell carcinoma; cinnamaldehyde; hyperthermia treatment; synergism; apoptosis; reactive oxygen species
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Funding
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [NRF-2017R1C1B2011669, NRF-2020R1C1C1009721, NRF-2020R1I1A3063625]
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Renal cell carcinoma (RCC) represents the most common form of kidney cancer, which accounts for 3-5% newly diagnosed cancer cases. Since limited therapies are available for RCC, a search for new options is required. Therefore, in this study, we evaluated the combination effect of cinnamaldehyde (CNM) and hyperthermia treatment. CNM treatment combined with 43 degrees C hyperthermia synergistically increased cytotoxicity in RCC cell line ACHN cells. Through Western blot assays, we observed increased apoptosis signaling and decreased proliferation/metastasis signaling, along with a repressed heat shock protein 70 level. In flow cytometry analyses, CNM and hyperthermia combination clearly induced apoptosis and mitochondrial potential of ACHN cells, while arresting the cell cycle. Investigation of reactive oxygen species (ROS) suggested a significant increase of ROS generation by CNM and 43 degrees C hyperthermia co-treatment. We could verify that ROS is crucial in the apoptotic action of combination treatment with CNM and hyperthermia through further experiments regarding an ROS scavenger. Overall, we suggest CNM and hyperthermia combination treatment as an alternative option of anticancer strategies for RCC.
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