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- W4360950025 abstract "Abstract The nuclear factor-κB (NF-κB) signaling pathway regulates specific immunological responses and controls a wide range of physiological processes. NF-κB inhibitor alpha (IKBA) is an NF-κB inhibitory mediator in the cytoplasm that modulates the nuclear translocation and DNA binding activities of NF-κB proteins. However, whether the upstream cascade of the canonical NF-κB signaling pathway has physiological roles independent of IKBA-mediated transcriptional activation remains unclear. Herein we investigated the function of IKBA in mature sperm in which transcriptional and translational events do not occur. IKBA was highly expressed in human sperm. The repression of IKBA phosphorylation by its inhibitor Bay117082 markedly enhanced sperm motility. On the contrary, lipopolysaccharide-stimulated IKBA phosphorylation significantly decreased sperm motility. Nevertheless, Bay117082 treatment did not affect the motility of IKBA-knockout sperm. Further, untargeted metabolomic analysis and pharmacological blocking assays revealed that the Bay117082-induced increase in sperm motility was attributable to fatty acid β-oxidation (FAO) enhancement. In addition, we found that IKBA phosphorylation inhibition resulted in a significant reduction of acetyl-CoA carboxylase levels in the FAO metabolic pathway. Our findings indicate that IKBA-mediated signaling orchestrates sperm motility program and improves our understanding of transcription-independent NF-κB signaling pathway in cells." @default.
- W4360950025 created "2023-03-26" @default.
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- W4360950025 date "2023-03-25" @default.
- W4360950025 modified "2023-10-14" @default.
- W4360950025 title "IKBA phosphorylation governs human sperm motility through ACC-mediated fatty acid beta-oxidation" @default.
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- W4360950025 doi "https://doi.org/10.1038/s42003-023-04693-6" @default.
- W4360950025 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36966253" @default.
- W4360950025 hasPublicationYear "2023" @default.
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