乳脂球表皮生长因子8在急性胰腺炎中的作用研究进展
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1.陕西中医药大学第一临床医学院 中西医临床医学系,陕西 咸阳 712046;2.陕西中医药大学附属医院 普通外科, 陕西 咸阳 712046

作者简介:

韩明,陕西中医药大学第一临床医学院硕士研究生,主要从事中西医临床普通外科基础与临床方面的研究。

基金项目:

陕西省自然科学基金资助项目(2021JM-474);陕西省咸阳市2018年科学技术研究计划资助项目(2018K02-100);陕西省咸阳市2020年中青年科技创新领军人才基金资助项目(2020K04-01)。


Research progress on the role of milk fat globule epidermal growth factor 8 in acute pancreatitis
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1.Department of Chinese and Western Clinical Medicine, the First Clinical Medical College, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi 712046, China;2.Department of General Surgery, Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, Shaanxi 712046, China

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    摘要:

    急性胰腺炎(AP)是临床上常见的消化系统的急症之一,其发病机制复杂且尚未完全阐明,亦缺乏特异性的治疗手段。而乳脂球表皮生长因子8(MFG-E8)的发现为AP的诊治提供了新的方向和思路。研究显示,MFG-E8参与AP的病理生理过程,可能是AP的内源性保护介质,同时MFG-E8在AP患者血清中的高表达可能作为评价AP治疗有效性的潜在生物标志物。近年来随着对AP发生的病理生理机制研究不断深入,已经证实钙介导的腺泡细胞损伤和死亡机制,清除凋亡和坏死细胞在AP炎症反应中的必要性,以及线粒体通透性转换孔和肠黏膜屏障在AP中的重要性等。而MFG-E8在AP的发生发展过程中扮演重要角色,一方面,MFG-E8通过改善胰腺结构,恢复胰腺腺泡细胞的再生功能并清除坏死的腺泡,同时降低AP动物模型小鼠的血清淀粉酶、脂肪酶水平而缓解AP;另一方面,MFG-E8通过介导的炎症信号通路促进巨噬细胞重编程,以减少促炎细胞因子的产生,从而抑制AP炎症反应。同时MFG-E8可通过改善线粒体生物发生,增加线粒体融合而修复线粒体的结构和功能,从而减轻氧化应激反应防止AP进展。此外,MFG-E8在修复肠黏膜屏障、减少肠道细菌移位、改善肠道缺血再灌注等方面亦发挥重要作用。MFG-E8作为一种亲脂性抗炎糖蛋白,具有抗自身免疫性和炎性疾病等多种生物活性,通过与整合素受体αvβ3/5和磷脂酰丝氨酸结合,而具有多种生物学功能,并参与肠上皮细胞的维持和修复、血管生成、肿瘤细胞间的黏附、增殖以及凋亡细胞的清除等细胞过程。目前研究发现MFG-E8在多种疾病中发挥重要的作用,包括感染性疾病、肿瘤、神经系统疾病、自身免疫性疾病等。然而MFG-E8在AP中的作用是在近年来才被意识到,对于其具体的作用机制尚处于初步认识阶段,并未完全明确;且目前的文献报道多集中于炎症反应、线粒体功能恢复和肠黏膜屏障保护方面,对于在AP其他病理机制中的作用如胰腺微循环,还需进一步的研究;其次对于MFG-E8干预AP的时机,适用的阶段,以及具体的量效关系还未有确切的定论,但靶向MFG-E8是治疗AP的新策略。因此,继续深入研究MFG-E8在AP发病中的作用对于AP的诊治具有重要意义。笔者就MFG-E8的结构功能及其在AP中的作用机制,同时以MFG-E8为靶点进行AP治疗的相关文献作一综述,为今后AP的临床诊治提供新的切入点。

    Abstract:

    Acute pancreatitis (AP) is one of the common digestive system emergencies in clinical practice. Its pathogenesis is complex and has not yet been fully elucidated, and there is also no specific treatment. The finding of creamy ball epidermal growth factor 8 (MFG-E8) has provided a new direction and approach for the diagnosis and treatment of AP. Studies have shown that MFG-E8 is involved in the pathophysiological process of AP and may be the endogenous protection medium of AP. At the same time, the high expression of MFG-E8 in serum of patients with AP may be used as a potential biomarker to evaluate the effectiveness of AP treatment. In recent years, with the deepening of research on the pathophysiological mechanism of AP, calcium-mediated mechanism for acinar cell injury and death has been confirmed, as well as the necessity of eliminating apoptotic and necrotic cells in the AP inflammatory response, and the importance of mitochondrial permeability transition holes and intestinal mucosal barrier in AP. MVG-E8 plays an important role in the occurrence and development of AP. On the one hand, MFG-E8 relieves AP by improving the pancreatic structure, restoring the regeneration function of pancreatic acinar cells and removing the necrotic acinus, and reducing the serum amylase and lipase in AP animal model mice. On the other hand, MFG-E8 promotes macrophage reprogramming through a mediated inflammatory signaling pathway to reduce the production of pro-inflammatory cytokines and thus inhibits AP inflammatory response. At the same time, MFG-E8 can repair the structure and function of mitochondria by improving mitochondrial biogenesis and increasing mitochondrial fusion, thereby reduces oxidative stress response and prevents AP progression. In addition, MFG-E8 also plays an important role in repairing the intestinal mucosal barrier, reducing intestinal bacterial translocation, and improving intestinal ischemia-reperfusion. As a lipophilic anti-inflammatory glycoprotein, MFG-E8 has multiple biological activities against autoimmune and inflammatory diseases, and has multiple biological functions by binding to integrin receptor αvβ3/5 and phosphatidylserine, and is involved in the cellular processes such as maintenance and repair of intestinal epithelial cells, angiogenesis, adhesion and proliferation between tumor cells, and the clearance of apoptotic cells. At present, studies have found that MFG-E8 plays an important role in a variety of diseases, such as infectious diseases, tumors, nervous system diseases, autoimmune diseases. However, the role of MFG-E8 in AP has been recognized only in recent years, and the specific mechanism is still in the preliminary understanding stage and not completely clear. Besides, the current literature reports mostly focus on the inflammatory reaction, mitochondrial function recovery and intestinal mucosal barrier protection, and further research is needed for its role in other pathological mechanisms of AP, such as pancreatic microcirculation. Second, there is no definitive conclusion about the timing, applicable stage and specific dose-effect relationship of MFG-E8 intervention on AP. However, targeting MFG-E8 is a new strategy for the treatment of AP. Therefore, it is important to further study the role of MFG-E8 in the pathogenesis of AP for the diagnosis and treatment of AP. Therefore, in this paper, the structure and function of MFG-E8 and its mechanism of action in AP are reviewed, and the related literature concerning treatment of AP with MFG-E8 as the target is summarized, which will provide a new breakthrough point for the clinical diagnosis and treatment of AP in the future.

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韩明,周军,雷霆.乳脂球表皮生长因子8在急性胰腺炎中的作用研究进展[J].中国普通外科杂志,2021,30(9):1108-1115.
DOI:10.7659/j. issn.1005-6947.2021.09.014

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  • 收稿日期:2021-06-10
  • 最后修改日期:2021-08-23
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  • 在线发布日期: 2021-10-09