Journal of Southern Medical University ›› 2024, Vol. 44 ›› Issue (10): 1947-1954.doi: 10.12122/j.issn.1673-4254.2024.10.13

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Cisplatin promotes TNF‑α autocrine to trigger RIP1/RIP3/MLKL-dependent necroptosis of human head and neck squamous cell carcinoma cells

Hongxiao WANG1(), Detao TAO2,3(), Junjie MA1, Donglin ZHANG1,3, Zuoyuan SHEN1, Chao DENG1,3(), Jingping ZHOU1,3()   

  1. 1.School of Stomatology, Wannan Medical College, Wuhu 241002, China
    2.Department of Oral and Maxillofacial Surgery, First Affiliated Hospital (Yijishan Hospital) of Wannan Medical College, Wuhu 241100, China
    3.Anhui Engineering Research Center for Oral Materials and Application, Hefei 230031, China
  • Received:2024-07-25 Online:2024-10-20 Published:2024-10-31
  • Contact: Chao DENG, Jingping ZHOU E-mail:1492673419@qq.com;taodetao@wnmc.edu.cn;20120015@wnmc.edu.cn;19950008@wnmc.edu.cn

Abstract:

Objective To investigate whether cisplatin induces tumor necrosis factor‑α (TNF‑α) secretion in human head and neck squamous cell carcinoma (HNSCC) cells to trigger RIP1/RIP3/MLKL-dependent necroptosis of the cells. Methods HNSCC cell lines HN4 and SCC4 treated with cisplatin (CDDP) or the combined treatment with CDDP and z-VAD-fmk (a caspase inhibitor) or Nec-1 (a necroptosis inhibitor) for 24 h were examined for changes in cell viability using CCK8 assay and expressions of caspase-8 and necroptosis pathway proteins (RIP1/RIP3/MLKL) using Western blotting. The changes in migration of the cells were assessed with cell scratch assay, and the expressions of epithelial-mesenchymal transition (EMT) marker proteins N-cadherin, vimentin, and E-cadherin as well as the expressions of NF‑κB (p65) and TNF‑α were detected with Western blotting. Results The IC50 of cisplatin was 10 μg/mL in HN4 cells and 15 μg/mL in SCC4 cells. Cisplatin treatment significantly decreased the expressions of caspase-8, N-cadherin and vimentin and increased the expressions of E-cadherin, the necroptosis pathway proteins (RIP1/RIP3/MLKL), TNF‑α, and NF‑κB (p65), and these changes were obviously inhibited by treatment with Nec-1. Cisplatin stimulation also significantly lowered migration of the cells, and this inhibitory effect was strongly attenuated by Nec-1 treatment. Conclusion Cisplatin activates nuclear factor‑κB signaling in HNSCCs to promote TNF‑α autocrine and induce RIP1/RIP3/MLKL-dependent necroptosis, thus leading to inhibition of cell proliferation.

Key words: human head and neck squamous cell carcinoma, cisplatin, z-VAD-fmk, necroptosis, Nec-1