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- W2775606072 abstract "Galectin-3 (Gal-3) is a β-galactoside binding protein able to modulate both innate and adaptive immune responses. First identified in macrophages, Gal-3 has been studied widely in many mammalian immune cells, but scarcely in natural killer (NK) cells. The aim of this study was to analyze Gal-3 in human NK cells, isolated from peripheral blood mononuclear cells. Both PCR and RT-PCR analysis showed that resting human NK cells express Gal-3 mRNA, which can be modulated upon cytokine stimulation (100 U/ml IL–2 + 20 ng/ml IL-15) for different period of time (1–24 h). Western blot, cytofluorimetry, and confocal microscopy analysis clearly demonstrated that the Gal-3 gene can translate into the corresponding protein. From our results, resting NK cells, isolated from different healthy donors, can express high or low basal levels of Gal-3. In NK cells, Gal-3 was always intracellularly detected at both cytoplasm and nucleus levels, while never at the membrane surface, and its localization resulted independent from the cellular activation status. In addition, the intracellular Gal-3 can co-localize with perforin in exocytic vesicles. Cell treatment with a thiodigalactoside-based Gal-3 inhibitor (1–30 μM) slightly increased the number of degranulating NK cells, while it significantly increased the percentage of cells releasing high amounts of cytotoxic granules (+ 36 ± 3% vs. inhibitor-untreated cells at 30 μM Gal-3). In conclusion, our results demonstrate that human resting NK cells express Gal-3 at both gene and protein levels and that the Gal-3 expression can be modulated upon cytokine stimulation. In the same cells, Gal-3 always localizes intracellularly and functionally correlates with the degree of NK cell degranulation." @default.
- W2775606072 created "2017-12-22" @default.
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- W2775606072 date "2018-02-01" @default.
- W2775606072 modified "2023-10-04" @default.
- W2775606072 title "“In vitro” studies on galectin-3 in human natural killer cells" @default.
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- W2775606072 doi "https://doi.org/10.1016/j.imlet.2017.12.004" @default.
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