Redox control of Cas phosphorylation requires Abl kinase in regulation of intestinal epithelial cell spreading and migration.

Redox control of Cas phosphorylation requires Abl kinase in regulation of intestinal epithelial cell spreading and migration.
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Cas 磷酸化的氧化还原控制需要 Abl 激酶来调节肠上皮细胞的扩散和迁移。

DOI:
10.1152/ajpgi.00189.2016
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发表时间:
2016
期刊:
American journal of physiology. Gastrointestinal and liver physiology
影响因子:
--
通讯作者:
Neish,AndrewS
Neish,AndrewS
中科院分区:
--
文献类型:
--
作者:
Matthews,JasonD;Sumagin,Ronen;Hinrichs,Benjamin;Nusrat,Asma;Parkos,CharlesA;Neish,AndrewS

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肠道伤口经常发生在肠道炎症和缺血性疾病期间。为了修复损伤,肠上皮细胞必须快速扩散和迁移以覆盖暴露的固有层,这是涉及氧化还原信号传导的事件。伤口会发生广泛的氧化还原变化,特别是由上皮细胞和迁移的白细胞在邻近组织中产生的 H2O2 引起的。控制这些过程的机制尚不完全清楚,特别是在蛋白质信号传导水平上。 Crk 相关底物 (Cas) 是一种重要的信号蛋白,已知可调节粘着斑和肌动蛋白细胞骨架动力学,其与 Crk 的关联受到 Abl 激酶(一种普遍表达的酪氨酸激酶)的调节。我们试图评估 Cas 的 Abl 调节在伤口闭合过程中细胞扩散和迁移水平上的作用。作为模型,我们使用暴露于 H2O2 或划伤的肠上皮细胞来评估 Abl-Cas 信号通路。我们在基线条件下和活检损伤粘膜后对小鼠结肠上皮中磷酸化 Cas 的定位进行了表征。操纵 Abl 激酶后,通过显微镜或生化分析对肌动蛋白和粘着斑动力学进行分析,结果表明 Abl 控制氧化还原依赖性 Cas 磷酸化和定位,从而影响细胞扩散和迁移。总的来说,我们的数据为控制肠道伤口愈合的氧化还原敏感蛋白信号传导模块提供了新的线索。
Intestinal wounds often occur during inflammatory and ischemic disorders of the gut. To repair damage, intestinal epithelial cells must rapidly spread and migrate to cover exposed lamina propria, events that involve redox signaling. Wounds are subject to extensive redox alterations, particularly resulting from H2O2produced in the adjacent tissue by both the epithelium and emigrating leukocytes. The mechanisms governing these processes are not fully understood, particularly at the level of protein signaling. Crk-associated substrate, or Cas, is an important signaling protein known to modulate focal adhesion and actin cytoskeletal dynamics, whose association with Crk is regulated by Abl kinase, a ubiquitously expressed tyrosine kinase. We sought to evaluate the role of Abl regulation of Cas at the level of cell spreading and migration during wound closure. As a model, we used intestinal epithelial cells exposed to H2O2or scratch wounded to assess the Abl-Cas signaling pathway. We characterized the localization of phosphorylated Cas in mouse colonic epithelium under baseline conditions and after biopsy wounding the mucosa. Analysis of actin and focal adhesion dynamics by microscopy or biochemical analysis after manipulating Abl kinase revealed that Abl controls redox-dependent Cas phosphorylation and localization to influence cell spreading and migration. Collectively, our data shed new light on redox-sensitive protein signaling modules controlling intestinal wound healing.
自动多维图像分析揭示了 Abl 在胚胎伤口修复中的作用
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