Neuroinflammation Group, Immunology Laboratory, Department of Pathology, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Malaysia.
Cell Signaling Laboratory, Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Malaysia.
Cell Immunol. 2020 Nov;357:104200. doi: 10.1016/j.cellimm.2020.104200. Epub 2020 Aug 28.
Tocopherols long dominated studies on vitamin E, although interest has shifted to tocotrienols. It was previously shown that δ-tocotrienol derived from palm oil reduced nitric oxide released by BV2 microglia as early as 18 h after lipopolysaccharide stimulation. The current study measured δ-tocotrienol uptake by BV2 over a 24 h incubation period and its anti-inflammatory effects on primary microglia. Uptake of 17.5 μg/mL δ-tocotrienol by BV2 microglia began as early as 5 min and rose steeply to 21 ± 3% of the amount administered at 24 h. The amount of δ-tocotrienol retained in the lipopolysaccharide-stimulated microglia at 24 h was 14 ± 2%, with no substantial difference seen in unstimulated microglia. The same δ-tocotrienol regimen reduced nitric oxide levels by 82% at 24 h after lipopolysaccharide stimulation (p < 0.05). This was accompanied by decreased inducible nitric oxide synthase protein expression by 67 ± 5% compared to untreated controls (p < 0.05). In primary microglia, δ-tocotrienol downregulated IL-1β production, but TNF-α and IL-6 were not affected. δ-Tocotrienol also reduced prostaglandin E2 production by ~78%% and decreased transcription of COX-2 and 5-LOX, but not COX-1. This study showed the anti-inflammatory effects of δ-tocotrienol derived from palm oil and opens up interest for tocotrienol supplementation to reduce the effects of inflammatory conditions.
生育酚长期以来一直主导着维生素 E 的研究,尽管人们的兴趣已转移到生育三烯酚上。先前的研究表明,来源于棕榈油的 δ-生育三烯酚早在脂多糖刺激后 18 小时就能降低 BV2 小胶质细胞释放的一氧化氮。本研究在 24 小时孵育期间测量了 BV2 对 δ-生育三烯酚的摄取及其对原代小胶质细胞的抗炎作用。BV2 小胶质细胞摄取 17.5μg/ml δ-生育三烯酚早在 5 分钟就开始,并在 24 小时内急剧上升至给药量的 21±3%。在 24 小时时,在脂多糖刺激的小胶质细胞中保留的 δ-生育三烯酚量为 14±2%,在未刺激的小胶质细胞中未观察到明显差异。相同的 δ-生育三烯酚方案可使脂多糖刺激后 24 小时的一氧化氮水平降低 82%(p<0.05)。与未处理的对照组相比,这伴随着诱导型一氧化氮合酶蛋白表达降低 67±5%(p<0.05)。在原代小胶质细胞中,δ-生育三烯酚下调了白细胞介素-1β的产生,但肿瘤坏死因子-α和白细胞介素-6不受影响。δ-生育三烯酚还将前列腺素 E2 的产生降低了约 78%,并降低了 COX-2 和 5-LOX 的转录,但不降低 COX-1 的转录。这项研究表明了来源于棕榈油的 δ-生育三烯酚的抗炎作用,并为补充生育三烯酚以减轻炎症状态的影响开辟了兴趣。
Lipids Health Dis. 2011-12-20
Int J Mol Sci. 2025-8-8
Molecules. 2023-4-10
Brain Sci. 2021-8-20