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- W2783495890 abstract "Mouse embryonic fibroblasts (MEFs) have extensively been used to study necroptosis, a recently identified form of programmed cell death. However, very little is yet known about the role of necroptosis and its regulation by reactive oxygen species (ROS) in cell types naturally exposed to high oxygen levels such as mouse lung fibroblasts (MLFs). Here, we discover that MLFs are highly susceptible to undergo necroptosis in a ROS-dependent manner upon exposure to a prototypic death receptor-mediated necroptotic stimulus, i.e. cotreatment with tumor necrosis factor (TNF)α, Smac mimetic and the caspase inhibitor zVAD.fmk (TSZ). Kinetic analysis revealed that TSZ rapidly induces cell death in MLFs. Pharmacological inhibition of receptor-interacting protein kinase (RIPK)1 by necrostatin-1 (Nec-1) or RIPK3 by GSK’872 significantly rescues TSZ-stimulated cell death. Also, genetic silencing of RIPK3 or mixed lineage kinase domain-like pseudokinase (MLKL) significantly protects MLFs from TSZ-mediated cell death. Prior to cell death, TSZ significantly increases production of ROS. Importantly, addition of radical scavengers such as butylated hydroxyanisole (BHA) or α-Tocopherol (α-Toc) significantly suppresses TSZ-induced cell death in parallel with a significant reduction of ROS generation. Consistently, BHA prevented TSZ-triggered phosphorylation of MLKL similar to the addition of GSK’872. Thus, our study demonstrates for the first time that MLFs are prone to undergo necroptosis in response to a prototypic necroptotic stimulus and identifies ROS as important mediators of TSZ-triggered necroptosis." @default.
- W2783495890 created "2018-01-26" @default.
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- W2783495890 date "2018-07-01" @default.
- W2783495890 modified "2023-10-14" @default.
- W2783495890 title "Mouse lung fibroblasts are highly susceptible to necroptosis in a reactive oxygen species-dependent manner" @default.
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- W2783495890 doi "https://doi.org/10.1016/j.bcp.2018.01.025" @default.
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