News Release

II型炎症对肥肚腩可能有益,但它对肝脏有害

Type 2 immunity is protective in metabolic disease but exacerbates NAFLD collaboratively with TGF-β

Peer-Reviewed Publication

American Association for the Advancement of Science (AAAS)

Type 2 Inflammation Might be Good for the Belly But Bad for the Liver

image: Infographic explaining how different types of inflammation are related to obesity and non-alcoholic fatty liver disease; Figure 7C, Biopsy samples from non-alcoholic fatty liver disease patients showing immune cell infiltration (arrows). view more 

Credit: [Credit: Carla Schaffer / K.M. Hart et al. / AAAS]

II型炎症对肥肚腩可能有益,但它对肝脏有害一种曾被认为可防止肥胖症的炎症反应其实会加剧非酒精性脂肪肝病(NAFLD),这就是为什么新的发现提示,某些对代谢综合征的靶向治疗可能需要被重新评估。NAFLD是发达国家中最常见的进行性肝脏疾病类型,它也是肝移植的排第二位的主要指针。更重要的是,美国每年与NAFLD相关的直接医疗费用总额高达1030亿美元,还没有被批准的药物可用来治疗美国罹患此病的6400万人。由于肥胖症、NAFLD和炎症是密切关联的,因此人们一直在不断尝试研发旨在调节受影响患者免疫反应的干预措施。炎症类型有许多种,在肥胖症中,I型炎症与胰岛素抵抗相关联,而II型炎症则被认为(除了能保护机体免于寄生性蠕虫感染外)还可维持脂肪组织中的健康代谢信号通路。在这里,Kevin Hart和同事有了意外的发现:I型炎症的遗传易感性可保护小鼠在摄入高脂饮食后免于NAFLD所致的肝脏纤维化。然而,令人意外的是,Hart等人发现,来自56名因NAFLD而罹患严重肝纤维化病人的活检样本中存在着II型炎症的证据。一种被称作TGF- β阻滞的抗炎疗法可在喂养高脂饮食的小鼠中减少NAFLD相关性纤维化的标记,但它会在小鼠肝脏中增加II型炎症。作者说,肝脏中II型炎症的征象可被用做预测NAFLD进展的临床指标。

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