Novak Elizabeth A, Mollen Kevin P
Department of Surgery, University of Pittsburgh School of Medicine Pittsburgh, PA, USA.
Front Cell Dev Biol. 2015 Oct 1;3:62. doi: 10.3389/fcell.2015.00062. eCollection 2015.
Inflammatory Bowel Disease (IBD) represents a group of idiopathic disorders characterized by chronic or recurring inflammation of the gastrointestinal tract. While the exact etiology of disease is unknown, IBD is recognized to be a complex, multifactorial disease that results from an intricate interplay of genetic predisposition, an altered immune response, changes in the intestinal microbiota, and environmental factors. Together, these contribute to a destruction of the intestinal epithelial barrier, increased gut permeability, and an influx of immune cells. Given that most cellular functions as well as maintenance of the epithelial barrier is energy-dependent, it is logical to assume that mitochondrial dysfunction may play a key role in both the onset and recurrence of disease. Indeed several studies have demonstrated evidence of mitochondrial stress and alterations in mitochondrial function within the intestinal epithelium of patients with IBD and mice undergoing experimental colitis. Although the hallmarks of mitochondrial dysfunction, including oxidative stress and impaired ATP production are known to be evident in the intestines of patients with IBD, it is as yet unclear whether these processes occur as a cause of consequence of disease. We provide a current review of mitochondrial function in the setting of intestinal inflammation during IBD.
炎症性肠病(IBD)是一组以胃肠道慢性或复发性炎症为特征的特发性疾病。虽然疾病的确切病因尚不清楚,但IBD被认为是一种复杂的多因素疾病,由遗传易感性、免疫反应改变、肠道微生物群变化和环境因素之间的复杂相互作用导致。这些因素共同作用,导致肠上皮屏障破坏、肠道通透性增加和免疫细胞涌入。鉴于大多数细胞功能以及上皮屏障的维持都依赖能量,因此可以合理推测线粒体功能障碍可能在疾病的发生和复发中起关键作用。事实上,多项研究已证明IBD患者和实验性结肠炎小鼠的肠上皮细胞内存在线粒体应激和线粒体功能改变的证据。虽然已知线粒体功能障碍的特征,包括氧化应激和ATP生成受损,在IBD患者的肠道中很明显,但目前尚不清楚这些过程是作为疾病的原因还是结果发生的。我们对IBD期间肠道炎症背景下的线粒体功能进行了当前综述。