通过靶向ARPC2抑制肌动蛋白聚合影响肠道干细胞稳态。

IF 6.3 1区 医学 Q1 DERMATOLOGY Burns & Trauma Pub Date : 2023-10-16 eCollection Date: 2023-01-01 DOI:10.1093/burnst/tkad038
Ruzhen Zhang, Sheng Chen, Zhifan Yang, Ning Zhang, Kenan Guo, Keyi Lv, Zimo Zhou, Meijiao Gao, Xiancheng Hu, Yongping Su, Jianming He, Fengchao Wang
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引用次数: 0

摘要

背景:肠上皮的快速周转是由肠干细胞(ISCs)的增殖和分化驱动的。F-肌动蛋白细胞骨架的动力学对于维持细胞间作用力和信号转导网络至关重要。然而,目前尚不清楚肌动蛋白聚合的直接干扰如何影响ISC稳态。本研究旨在揭示F-肌动蛋白细胞骨架对肠上皮稳态的调节作用,以及苯丙胺(BPP)作为抗肿瘤药物的潜在风险。方法:用Phalloidin荧光染色法检测F-肌动蛋白的聚合作用。采用流式细胞术和IHC染色对不同类型的肠上皮细胞进行鉴别。通过溴脱氧尿苷(BrdU)和5-乙炔基-2'-脱氧尿苷掺入测定来评估细胞增殖。通过类器官培养在体外复制肠道干细胞的增殖和分化。通过BrdU脉冲标记和小鼠追逐来评估上皮迁移。结果:随着隐窝细胞向绒毛区迁移,F-肌动蛋白含量显著增加。此外,分泌细胞中的肌动蛋白聚合,特别是Paneth细胞(PC),远高于邻近ISC。用新鉴定的肌动蛋白相关蛋白2/3复合物亚基2(ARPC2)抑制剂BPP治疗导致体外肠道类器官生长和体内隐窝细胞增殖的剂量依赖性增加或抑制。与载体组相比,BPP处理降低了Lgr5-ISC特征基因在体内和类器官培养中的表达。同时,来自ISCs和祖细胞的PC分化通过抑制F-肌动蛋白聚合而降低。从机制上讲,BPP诱导的肌动蛋白聚合抑制可能激活Yes1相关的转录调节通路,从而影响ISC的增殖和分化。因此,BPP治疗以剂量依赖的方式影响肠上皮细胞的迁移。结论:细胞骨架重组的调控可以影响ISC的稳态。此外,用美国食品药品监督管理局批准的药物BPP抑制ARPC2代表了一种影响肠上皮细胞更新的新方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Actin polymerization inhibition by targeting ARPC2 affects intestinal stem cell homeostasis.

Background: The rapid turnover of the intestinal epithelium is driven by the proliferation and differentiation of intestinal stem cells (ISCs). The dynamics of the F-actin cytoskeleton are critical for maintaining intercellular force and the signal transduction network. However, it remains unclear how direct interference with actin polymerization impacts ISC homeostasis. This study aims to reveal the regulatory effects of the F-actin cytoskeleton on the homeostasis of intestinal epithelium, as well as the potential risks of benproperine (BPP) as an anti-tumor drug.

Methods: Phalloidin fluorescence staining was utilized to test F-actin polymerization. Flow cytometry and IHC staining were employed to discriminate different types of intestinal epithelial cells. Cell proliferation was assessed through bromo-deoxyuridine (BrdU) and 5-ethynyl-2'-deoxyuridine (EdU) incorporation assays. The proliferation and differentiation of intestinal stem cells were replicated in vitro through organoid culture. Epithelial migration was evaluated through BrdU pulse labeling and chasing in mice.

Results: The F-actin content was observed to significantly increase as crypt cells migrated into the villus region. Additionally, actin polymerization in secretory cells, especially in Paneth cells (PCs), was much higher than that in neighboring ISCs. Treatment with the newly identified actin-related protein 2/3 complex subunit 2 (ARPC2) inhibitor BPP led to a dose-dependent increase or inhibition of intestinal organoid growth in vitro and crypt cell proliferation in vivo. Compared with the vehicle group, BPP treatment decreased the expression of Lgr5 ISC feature genes in vivo and in organoid culture. Meanwhile, PC differentiation derived from ISCs and progenitors was decreased by inhibition of F-actin polymerization. Mechanistically, BPP-induced actin polymerization inhibition may activate the Yes1-associated transcriptional regulator pathway, which affects ISC proliferation and differentiation. Accordingly, BPP treatment affected intestinal epithelial cell migration in a dose-dependent manner.

Conclusion: Our findings indicate that the regulation of cytoskeleton reorganization can affect ISC homeostasis. In addition, inhibiting ARPC2 with the Food and Drug Administration-approved drug BPP represents a novel approach to influencing the turnover of intestinal epithelial cells.

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来源期刊
Burns & Trauma
Burns & Trauma 医学-皮肤病学
CiteScore
8.40
自引率
9.40%
发文量
186
审稿时长
6 weeks
期刊介绍: The first open access journal in the field of burns and trauma injury in the Asia-Pacific region, Burns & Trauma publishes the latest developments in basic, clinical and translational research in the field. With a special focus on prevention, clinical treatment and basic research, the journal welcomes submissions in various aspects of biomaterials, tissue engineering, stem cells, critical care, immunobiology, skin transplantation, and the prevention and regeneration of burns and trauma injuries. With an expert Editorial Board and a team of dedicated scientific editors, the journal enjoys a large readership and is supported by Southwest Hospital, which covers authors'' article processing charges.
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