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- W2105894384 abstract "A growing body of evidence strongly indicates that both simulated and authentic weightlessness exert a broad range of effects on mammalian tissues and cells, including impairment of immune cell function and increased apoptotic death. We previously reported that microgravity-dependent activation of 5-lipoxygenase (5-LOX) might play a central role in the initiation of apoptosis in human T lymphocytes, suggesting that the upregulation of this enzyme might be (at least in part) responsible for immunodepression observed in astronauts during space flights. Herein, we supplement novel information about the molecular mechanisms underlying microgravity-triggered apoptotic cell death and immune system deregulation, demonstrating that under simulated microgravity human Jurkat T cells increase the content of cytosolic DNA fragments and cytochrome c (typical hallmarks of apoptosis) and have an upregulated expression and activity of µ -calpain. These events were paralleled by the unbalance of interleukin- (IL-) 2 and interferon- (INF-) γ , anti- and proapoptotic cytokines, respectively, that seemed to be dependent on the functional interplay between 5-LOX and µ -calpain. Indeed, we report unprecedented evidence that 5-LOX inhibition reduced apoptotic death, restored the initial IL-2/INF- γ ratio, and more importantly reverted µ -calpain activation induced by simulated microgravity." @default.
- W2105894384 created "2016-06-24" @default.
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- W2105894384 date "2014-01-01" @default.
- W2105894384 modified "2023-10-16" @default.
- W2105894384 title "A Functional Interplay between 5-Lipoxygenase and<i>μ</i>-Calpain Affects Survival and Cytokine Profile of Human Jurkat T Lymphocyte Exposed to Simulated Microgravity" @default.
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- W2105894384 doi "https://doi.org/10.1155/2014/782390" @default.
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