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Lactadherin orthologs inhibit migration of human, porcine and murine intestinal epithelial cells

机译:乳粘附素直系同源物抑制人,猪和鼠肠上皮细胞的迁移

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Abstract Lactadherin was originally described due to its appearance in milk, but is abundantly expressed especially by professional and nonprofessional phagocytes. The proteins has been shown to have a multitude of bioactive effects, including inhibition of inflammatory phospholipases, induction of effero- and phagocytosis, prevent rotavirus induced gastroenteritis, and modulate intestinal homeostasis by regulating epithelial cell migration. The level of expression seems to be important in a row of serious pathologies linked to the intestinal epithelial barrier function, vascular- and autoimmune disease. This study examines the ability of lactadherin to modulate migration of intestinal epithelium. A cell exclusion assay is used to quantify the ability of human, bovine and murine lactadherin orthologs to affect migration of primary small intestine epithelium cells. Previous reports show that recombinant murine lactadherin stimulate rat small intestine cell migration. The present study could not confirm this. Conversely, 10 ????g/ml lactadherin inhibits migration. Therefore, as lactadherins enteroprotective properties is well established using in vivo models we conclude that the protective effects are linked to lactadherins ability operate as an opsonin, or other modulating effects, and not a direct lactadherin-cell induction of migration. Thus, the molecular mechanism behind the enteroprotective role of lactadherin remains to be established.
机译:摘要Lactadherin最初是由于其在牛奶中的出现而被描述的,但在专业和非专业吞噬细胞中大量表达。该蛋白质已显示出多种生物活性作用,包括抑制炎症性磷脂酶,诱导腹泻和吞噬作用,预防轮状病毒引起的肠胃炎以及通过调节上皮细胞迁移来调节肠道稳态。在与肠上皮屏障功能,血管和自身免疫性疾病有关的一系列严重病理中,表达水平似乎很重要。这项研究检查了乳黏附素调节肠上皮迁移的能力。细胞排斥测定法用于量化人,牛和鼠乳黏附素直系同源物影响原代小肠上皮细胞迁移的能力。先前的报道表明,重组鼠乳黏附素刺激大鼠小肠细胞迁移。目前的研究无法证实这一点。相反,10μg/ ml的乳粘附素抑制迁移。因此,由于使用体内模型已经很好地确立了乳黏附素的肠保护特性,我们得出的结论是,保护作用与乳黏附素的功能有关,是调理素或其他调节作用,而不是直接由乳黏附素细胞诱导的迁移。因此,乳粘附素肠保护作用背后的分子机制仍有待建立。

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