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Clnk plays a role in TNF-alpha-induced cell death in murine fibrosarcoma cell line L929

Meng Xu1, Chengfeng Cai1, Xuli Sun1

  • 1State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, China.

Biochemical and Biophysical Research Communications
|May 27, 2015
PubMed

Insights

Clnk, an adapter protein, is essential for tumor necrosis factor (TNF)-induced cell death. It promotes reactive oxygen species generation and MLKL tetramer formation, leading to necrosis.

Area of Science:

  • Immunology
  • Cellular Biology
  • Molecular Biology

Background:

  • Clnk (cytokine receptor homology region-containing nuclear factor) is a known adapter protein involved in immunoreceptor signaling.
  • Its role in other cellular processes, particularly cell death, remains largely unexplored.

Purpose of the Study:

  • To investigate the role of Clnk in tumor necrosis factor (TNF)-induced cell death.
  • To elucidate the molecular mechanisms by which Clnk influences TNF-induced necrosis.

Main Methods:

  • Utilized L929 cell lines for experiments.
  • Investigated the function of Clnk downstream of RIP3 in TNF signaling pathways.
  • Assessed TNF-induced reactive oxygen species (ROS) generation and MLKL tetramer formation.

Main Results:

  • Clnk is required for TNF-induced cell death, functioning downstream of RIP3.
  • Clnk promotes TNF-induced ROS generation.
  • Clnk facilitates MLKL tetramer formation, leading to subsequent necrosis in L929 cells.

Conclusions:

  • Clnk plays a critical role in regulating TNF-induced necrosis.
  • Clnk acts as an essential adaptor protein in the TNF cell death pathway.
  • Further research is warranted to explore Clnk's involvement in other cellular processes.
Keywords:
ClnkMLKLNecrosisRIP3ROS

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