Angiopoietin-like 4 promotes epidermal stem cell proliferation and migration and contributes to cutaneous wound re-epithelialization

被引:3
|
作者
Yang, Yuan [1 ]
Yu, Chenghao [2 ]
Le, Yingying [4 ]
Gong, Weijuan [5 ]
Ju, Jihui [1 ,2 ]
Zhang, Guangliang [1 ,2 ]
Ji, Pengxiang [1 ,2 ]
Zuo, Rui [2 ]
Liu, Zhe [2 ]
Zhang, Ping [1 ,2 ]
Hou, Ruixing [1 ]
Fu, Yi [3 ]
机构
[1] Yangzhou Univ, Suzhou Ruihua Orthoped Hosp, Teaching Hosp, Med Coll, Suzhou 215104, Peoples R China
[2] Soochow Univ, Suzhou Med Coll, Suzhou 215123, Peoples R China
[3] Soochow Univ, Sch Biol & Basic Med Sci, Dept Human Anat Histol & Embryol, Suzhou 215123, Peoples R China
[4] Univ Chinese Acad Sci, Shanghai Inst Nutr & Hlth, Chinese Acad Sci, Shanghai 200031, Peoples R China
[5] Yangzhou Univ, Dept Immunol, Med Coll, Yangzhou 225009, Jiangsu, Peoples R China
关键词
angiopoietin-like; 4; cell migration; cell proliferation; epidermal stem cell; wound healing; INTERACTS; PROTEINS; ROLES;
D O I
10.3724/abbs.2023055
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Proliferation and migration of epidermal stem cells (EpSCs) are essential for epithelialization during skin wound healing. Angiopoietin-like 4 (ANGPTL4) has been reported to play an important role in wound healing, but the mechanisms involved are not fully understood. Here, we investigate the contribution of ANGPTL4 to full-thickness wound re-epithelialization and the underlying mechanisms using Angptl4-knockout mice. Immunohistochemical staining reveals that ANGPTL4 is significantly upregulated in the basal layer cells of the epidermis around the wound during cutaneous wound healing. ANGPTL4 deficiency impairs wound healing. H&E staining shows that ANGPTL4 deficiency significantly reduces the thickness, length and area of the regenerated epidermis post-wounding. Immunohistochemical staining for markers of EpSCs (alpha 6 integrin and beta 1 integrin) and cell proliferation (PCNA) shows that the number and proliferation of EpSCs in the basal layer of the epidermis are reduced in ANGPTL4-deficient mice. In vitro studies show that ANGPTL4 deficiency impedes EpSC proliferation, causes cell cycle arrest at the G1 phase and reduces the expressions of cyclins D1 and A2, which can be reversed by ANGPTL4 overexpression. ANGPTL4 deletion suppresses EpSC migration, which is also rescued by ANGPTL4 overexpression. Overexpression of ANGPTL4 in EpSCs accelerates cell proliferation and migration. Collectively, our results indicate that ANGPTL4 promotes EpSC proliferation by upregulating cyclins D1 and A2 expressions and accelerating the cell cycle transition from G1 to S phase and that ANGPTL4 promotes skin wound re-epithelialization by stimulating EpSC proliferation and migration. Our study reveals a novel mechanism underlying EpSC activation and re-epithelialization during cutaneous wound healing.
引用
收藏
页码:1265 / 1274
页数:10
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