中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (29): 4668-4674.doi: 10.3969/j.issn.2095-4344.1772

• 干细胞培养与分化 stem cell culture and differentiation • 上一篇    下一篇

龟板软膏调控毛囊干细胞中的Wnt/β-catenin信号通路修复大鼠急性皮肤创面

申  倩,胡佩欣,钟淑贤,杨亚兰,张赛霞,李  春   

  1. 广州中医药大学,广东省广州市  510006
  • 修回日期:2019-03-15 出版日期:2019-10-18 发布日期:2019-10-18
  • 通讯作者: 李春,硕士,副教授,硕士生导师,广州中医药大学,广东省广州市 510006
  • 作者简介:申倩,1994年生,广东省梅州市人,广州中医药大学硕士研究生,主要从事皮肤损伤研究。
  • 基金资助:

    国家自然科学基金(81403201),项目负责人:李春

Tortoise shell ointment for acute skin wound in rats via Wnt/beta-catenin signal pathway in hair follicle stem cells Tortoise shell ointment for acute skin wound in rats via Wnt/beta-catenin signal pathway in hair follicle stem cells

Shen Qian, Hu Peixin, Zhong Shuxian, Yang Yalan, Zhang Saixia, Li Chun   

  1. Guangzhou University of Chinese Medicine, Guangzhou 510006, Guangdong Province, China
  • Revised:2019-03-15 Online:2019-10-18 Published:2019-10-18
  • Contact: Li Chun, Master, Associate professor, Master’s supervisor, Guangzhou University of Chinese Medicine, Guangzhou 510006, Guangdong Province, China
  • About author:Shen Qian, Master candidate, Guangzhou University of Chinese Medicine, Guangzhou 510006, Guangdong Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81403201 (to LC)

摘要:

文章快速阅读:

文题释义:
毛囊干细胞:
位于真皮层皮脂腺开口处与立毛肌毛囊附着处之间的毛囊外根鞘隆突部,具有自我更新和分化的能力,它不仅可以维持正常皮肤中毛囊的再生,对恢复皮肤组织完整性和功能性中也起到关键的作用。毛囊干细胞在体内多处于静息状态,当皮肤受损时,毛囊干细胞被活化后从隆突部迁移出,快速募集至创面中心,通过增殖、迁移、分化形成表皮各层细胞和皮肤附属器,参与受损部位的修复。
Wnt/β-catenin信号通路:是一类高度保守的信号通路,广泛存在于多细胞真核生物中,是皮肤发育过程中出现最早的分子信号,调控毛囊的生长发育和毛囊干细胞的迁移分化。β-catenin作为细胞内信号传导蛋白,是Wnt信号通路激活的一种重要的上皮细胞表面黏附分子,能够进入细胞核内传递Wnt信号,进一步激活靶基因开始转录,启动细胞增殖周期。

 

摘要
背景:
龟板散由龟板、黄连和冰片组成,是治疗皮肤疮疡的有效方剂。中药单体机制明确,龟板的有效单体十四酸甾醇酯可以激活并调控毛囊干细胞中的Wnt/β-catenin信号通路。
目的:探讨龟板软膏对大鼠急性皮肤创面的修复效果,以及其作用是否通过调控毛囊干细胞的Wnt/β-catenin信号通路实现。
方法:取龟板散各组分中的有效单体十四酸甾醇酯(S8)、盐酸小檗碱及右旋龙脑制备龟板软膏。构建SD大鼠急性皮肤创面模型并随机分为3个药物组:龟板软膏组、S8组和空白对照组,连续给药10 d。造模后连续      3 d注射BrdU(50 mg/kg)标记增殖细胞。分别于修复第3,5,7及10天计算创面愈合率,苏木精-伊红染色和Masson染色观察创面病理学变化,Western blot法和免疫荧光检测Wnt/β-catenin信号通路蛋白β-catenin、LEF1、C-myc及毛囊干细胞的表面标志物CD34和Integrin β1的表达情况。实验方案经广州中医药大学动物实验伦理委员会批准,批准号为20190218001。
结果与结论:①修复第5,7,10天,龟板软膏组的创面愈合率均高于其他组(P < 0.05);②龟板软膏组新生表皮与真皮连接紧密,新生皮肤附属器较S8组和空白对照组多,胶原纤维致密,修复效果优于其他组;③龟板软膏组和S8组Wnt/β-catenin信号通路蛋白β-catenin、LEF1、C-myc及毛囊干细胞的表面标志物CD34、Integrin β1的阳性表达量均高于空白对照组,β-catenin、CD34和Integrin β1的阳性表达均上调,LEF1和C-myc的表达呈先上调后下降变化,差异有统计学意义(P < 0.05);④龟板软膏组中BrdU标记的增殖细胞数量较其他组多,且同时表达CD34阳性和LEF1阳性;⑤结果提示:龟板软膏可能通过调控毛囊干细胞中的Wnt/β-catenin信号通路,加快大鼠急性皮肤创面的修复,龟板软膏由S8、盐酸小檗碱及右旋龙脑3种有效单体组成,具有稳定性和安全性,其对急性皮肤创面的促愈合效果优于单一有效单体。


中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程
ORCID: 0000-0002-8274-6054(申倩)

关键词: 龟板软膏, 十四酸甾醇酯, 盐酸小檗碱, 右旋龙脑, Wnt/β-catenin信号通路, 毛囊干细胞, 急性皮肤创面

Abstract:

BACKGROUND: Traditional prescription Guiban San composed of tortoise shell, coptis chinensis and borneol is used for treating skin injury. As per the clear mechanism of traditional Chinese medicine monomer, the effective monomer cholesterol myristate of tortoise shell can activate and regulate the Wnt/β-catenin signal pathway in hair follicle stem cells.
OBJECTIVE: To explore the effect of tortoise shell ointment on acute skin wound in rats and the mechanism whether is by regulating Wnt/β-catenin signal pathway in hair follicle stem cells.
METHODS: Tortoise shell ointment was prepared with cholesterol myristate, berberine and borneol--the effective monomers from components of Guiban San. Acute skin wound model was made in Sprague-Dawley rats and rat models were then randomly divided into three groups: tortoise shell ointment group, cholesterol myristate (S8) group and control group. Medication in each group was administered continuously for 10 days. BrdU (50 mg/kg) for proliferative cell labeling was administered for 3 consecutive days. The healing rate of the wound was analyzed in different groups at 3, 5, 7, and 10 days after repair. Hematoxylin-eosin staining and Masson staining were conducted for histopathological observations. The expression of β-catenin, LEF1, C-myc in Wnt/β-catenin signal pathway and CD34, Integrin β1 in hair follicle stem cells were detected by western blot and immunofluorescence. The study protocol was approved by the Animal Ethics Committee of Guangzhou University of Chinese Medicine with an approval No. 20190218001.
RESULTS AND CONCLUSION: (1) At days 5, 7, and 10 after repair, the wound healing rate in the tortoise shell ointment group was significantly higher than that in the other groups (P < 0.05). (2) Compared with the S8 and control groups, tortoise shell ointment group showed better repair effect with more neoformative hair follicles and denser collagen fibers. (3) The expressions of β-catenin, LEF1, C-myc, CD34, Integrin β1 in the tortoise shell ointment and S8 group were higher than those in the control group. The positive expression of β-catenin, CD34 and Integrin β1 were increased during wound healing. LEF1 and C-myc were increased during the prophase and metaphase of wound healing but decreased during the later stage. The difference was statistically significant among three groups (P < 0.05). The number of BrdU-labeled proliferative cells in the tortoise shell ointment group was higher than that in the S8 and control groups, with concurrent positive expressions of CD34 and LEF1. To conclude, tortoise shell ointment may stably and safely promote the repair of acute skin wound in rats via regulating Wnt/β-catenin signal pathway in hair follicle stem cells, and the healing effect is superior to any single effective monomer.

Key words: tortoise shell ointment, cholesterol myristate, berberine, borneol, Wnt/β-catenin signal pathway, hair follicle stem cells, acute skin injury

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