Dig Liver Dis: 羟基酪醇和维生素 E 的抗氧化活性可儿童减轻NAFLD的全身炎症

2021-12-31 MedSci原创 MedSci原创

非酒精性脂肪性肝炎(NASH)又称代谢性脂肪性肝炎,是病理变化与酒精性肝炎相似但无过量饮酒史的临床综合征,好发于中年特别是超重肥胖个体。

非酒精性脂肪肝(NAFLD)是儿科年龄段慢性肝病的主要原因,尤其是在西方国家。非酒精性脂肪肝的特点是具有广泛的肝脏生理紊乱,从简单的脂肪变性(NAFL--非酒精性脂肪肝)到脂肪肝,再到脂肪性肝炎(非酒精性脂肪性肝炎-NASH)。一些研究已经表明,氧化应激和低级别的系统性炎症是NAFL向NASH发展的原因。而且还有助于肝脏星状细胞的激活和随之而来的纤维化。同时,氧化应激也被促炎症细胞因子的分泌增加所诱导,如白细胞介素(IL)-6、肿瘤坏死因子(TNF)-α和IL-1β,这些细胞因子可以激活Kupffer细胞,刺激免疫反应以消除受损细胞。如果刺激持续存在,炎症会变成慢性,并导致NAFL向NASH发展,有时甚至是不可逆转。以前的临床研究使用维生素E(VitE),(一种具有高抗氧化能力的维生素),在非酒精性脂肪肝患者的生化和组织学参数方面都有改善。

遗憾的是,VitE也表现出一些局限性,可能是由于其口服时的生物利用度较低,且缺乏对长期使用效果的研究。羟基酪醇(HXT)是一种在特级初榨橄榄油中发现的简单酚类物质。有研究显示HXT和VitE的组合,在非酒精性脂肪肝儿童中,改善了胰岛素抵抗,以及脂肪变性的程度。本项研究旨在探究HXT+VitE是否可减轻上述患者的全身炎症。

 

在这项观察性研究中,研究人员纳入了所有患有非酒精性脂肪肝的儿童。纳入的患者共70人,其中35人在安慰剂(Pla)组和35人在治疗组。治疗组每天服用两粒药丸,每粒含有3.75毫克羟基酪醇和5毫克维生素E。安慰剂组每天服用两片安慰剂,每片只含有240毫克的中链甘油三酯(MCTs)。然后评估了所有使用HXT和VitE联合治疗非酒精性脂肪肝后四个月的效果。

 

研究结果显示在安慰剂 (Pla)组 和 HXT+VitE治疗组中都发现了儿童全身炎症标志物的变化。特别是4个月后,两组IL-1β和TNF-α水平均降低,而IL-6降低,IL-10升高仅在HXT+VitE治疗组中有显著差异。使用 HXT+VitE 治疗的儿童显示其4-羟基-2-壬烯醛 (4-HNE) 和8-羟基-2'脱氧鸟苷(8-OHdG)显着降低,这与甘油三酯水平的改善相关。值得注意的是,只有8-OHdG的减少与脂肪变性的改善和 IL-10 水平的增加相关。

 

本项研究证实接受HXT 和 VitE 联合治疗的儿童 NAFLD患者全身炎症明显降低,其表现形式是主要通过增加 IL-10 循环水平来响应 DNA 损伤恢复,最终改善脂肪变性和高甘油三酯血症。

原始出处:

AntonellaMosca. Et al. Antioxidant activity of Hydroxytyrosol and Vitamin E reduces systemic inflammation in children with paediatric NAFLD. Digestive and Liver Disease.2021.

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    2022-08-09 lvygwyt2781
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