中国组织工程研究 ›› 2025, Vol. 29 ›› Issue (11): 2243-2251.doi: 10.12307/2025.350

• 口腔组织构建 oral tissue construction • 上一篇    下一篇

外源性碱性成纤维细胞生长因子促进大鼠创面愈合的机制

李振超1,杜喜玲2,韩志新1,牛大伟1,樊昌伟1   

  1. 1安阳市人民医院整形烧伤科,河南省安阳市  455000;2鹤壁职业技术学院,河南省鹤壁市  458000
  • 收稿日期:2024-01-11 接受日期:2024-02-22 出版日期:2025-04-18 发布日期:2024-08-10
  • 通讯作者: 韩志新,主治医师,安阳市人民医院整形烧伤科,河南省安阳市 455000
  • 作者简介:李振超,男,1981年生,汉族,河南省濮阳市人,副主任医师,主要从事整形烧伤创面修复方面的研究。
  • 基金资助:
    河南省医学科技攻关计划联合共建项目(LHGJ20230855),项目负责人:韩志新;安阳市科技攻关计划项目(2023C01SF149),项目负责人:韩志新

Mechanism by which exogenous basic fibroblast growth factor promotes wound healing in rats

Li Zhenchao1, Du Xiling2, Han Zhixin1, Niu Dawei1, Fan Changwei1   

  1. 1Department of Orthopedics and Burn, Anyang People’s Hospital, Anyang 455000, Henan Province, China; 2Hebi Polytechnic, Hebi 458000, Henan Province, China
  • Received:2024-01-11 Accepted:2024-02-22 Online:2025-04-18 Published:2024-08-10
  • Contact: Han Zhixin, Attending physician, Department of Orthopedics and Burn, Anyang People’s Hospital, Anyang 455000, Henan Province, China
  • About author:Li Zhenchao, Associate chief physician, Department of Orthopedics and Burn, Anyang People’s Hospital, Anyang 455000, Henan Province, China
  • Supported by:
    Henan Provincial Medical Science and Technology Tackling Program Joint Construction Project, No. LHGJ20230855 (to HZX); Anyang Science and Technology Tackling Program, No. 2023C01SF149 (to HZX)

摘要:


文题释义:
创面愈合:是一种受损皮肤恢复解剖结构和生理功能的自我修复行为,是维系皮肤完整性的重要生理过程,主要包括止血、炎性应激、内皮细胞增殖以及纤维重塑等4个过程,在机体自愈过程中,这4个过程序贯进行,皮肤创面才能顺利愈合。
巨噬细胞表型转化:具有吞噬能力的巨噬细胞对生长、发育、组织损伤修复、内环境稳定发挥重要作用,主要以M1样促炎型和M2样抑炎型两种类型存在,两者维系动态平衡;当发生创伤后,病灶位置炎性递质增多,M1型向M2型转换受阻,促炎性递质分泌增加,创面处于持续性的炎性应激阶段,修复缓慢;药物干预后,M2型比例升高,抑炎递质释放增加,创面炎性应激下降,创面损伤修复加快。

背景:深入揭示外源性碱性成纤维细胞生长因子促进创面愈合的分子机制。
目的:探讨外源性碱性成纤维细胞生长因子对大鼠创面修复中巨噬细胞表型转换和肉芽再生的影响。
方法:①体外细胞实验:分为正常对照组、低剂量碱性成纤维细胞生长因子组、高剂量碱性成纤维细胞生长因子组以及碱性成纤维细胞生长因子+丙戊酸组,其中低、高剂量碱性成纤维细胞生长因子组细胞培养基中分别添加100,200 μg/L 碱性成纤维细胞生长因子,碱性成纤维细胞生长因子+丙戊酸组细胞培养基中添加200 μg/L碱性成纤维细胞生长因子和20 mmol/L Notch1/Jagged1激动剂丙戊酸。通过EdU实验、划痕实验、小管生成实验检测碱性成纤维细胞生长因子对人脐静脉内皮细胞增殖、迁移和血管新生的影响。②体内动物实验:SD大鼠按照随机数字表法分为模型组、低剂量碱性成纤维细胞生长因子组、高剂量碱性成纤维细胞生长因子组以及碱性成纤维细胞生长因子+丙戊酸组,构建大鼠全层皮肤缺损开放性创面模型,其中低、高剂量碱性成纤维细胞生长因子组皮下注射100,200 μg/L碱性成纤维细胞生长因子,碱性成纤维细胞生长因子+丙戊酸组大鼠皮下注射200 μg/L 碱性成纤维细胞生长因子的同时腹腔注射10 mg/kg丙戊酸。给药7,
14 d检测大鼠创面的愈合率;TUNEL检测创面组织中的细胞凋亡情况;酶联免疫吸附实验检测大鼠血清中丙二醛、超氧化物歧化酶、肿瘤坏死因子α和白细胞介素10水平;免疫荧光检测创面组织中巨噬细胞的表型转换情况;免疫组化检测创面组织中增殖细胞核抗原、CD31和血管内皮生长因子的表达;Western blot法检测创面组织中Notch1、Jagged1的表达。
结果与结论:①与正常对照组相比,碱性成纤维细胞生长因子能明显促进人脐静脉内皮细胞的增殖、迁移和血管新生,并且具有剂量依赖性;②与模型组相比,碱性成纤维细胞生长因子能明显促进创面的愈合,下调创面组织中的细胞凋亡率;降低大鼠血清中丙二醛和肿瘤坏死因子α水平,升高超氧化物歧化酶和白细胞介素10水平;促使创面组织中巨噬细胞向M2型转换,上调创面组织中增殖细胞核抗原、CD31和血管内皮生长因子的表达;抑制创面组织中Notch1、Jagged1的表达,并且均具有剂量依赖性。丙戊酸可部分逆转碱性成纤维细胞生长因子对创面愈合的促进作用。结果表明,碱性成纤维细胞生长因子能明显促进创面愈合与肉芽再生以及诱导巨噬细胞向M2型转换,这可能与调控Notch1/Jagged1信号有关。

https://orcid.org/0009-0002-1375-2941(李振超)

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: 碱性成纤维细胞生长因子, 全层皮肤缺损, 创面, 巨噬细胞表型转换, 肉芽再生, Notch1, Jagged1

Abstract: BACKGROUND: This study provided insight into the molecular mechanisms by which exogenous basic fibroblast growth factor (bFGF) promotes wound healing.
OBJECTIVE: To investigate the effect of exogenous bFGF on macrophage phenotype transition and granulation regeneration during wound repair in rats. 
METHODS: (1) In vitro experiment: Cells were divided into normal control group, low-dose bFGF group, high-dose bFGF group, and bFGF+valproic acid group. 100 and 200 μg/L bFGF was added into the cell culture medium of low-dose bFGF group and high-dose bFGF group, respectively, while 200 μg/L bFGF and 20 mmol/L valproic acid were added into the cell culture medium of valproic acid group. EdU test, scratch test and tubule formation test were used to detect the effects of bFGF on proliferation, migration and angiogenesis of human umbilical vein endothelial cells. (2) In vivo experiment: Sprague-Dawley rats were randomly divided into model group, low-dose bFGF group, high-dose bFGF group and bFGF+valproic acid group. The open wound model of full-thickness skin defect was established in low-dose bFGF group, high-dose bFGF group and bFGF+valproic acid group. Rats in the low- and high-dose bFGF groups were given 100 and 200 μg/L bFGF through subcutaneous injection, while those in the bFGF+valproic acid group received subcutaneous injection of 200 μg/L bFGF and intraperitoneal injection of 10 mg/kg valproic acid. The wound healing rate of rats was detected at 7 and 14 days of administration. TUNEL was used to detect the apoptosis of cells in wound tissue. Enzyme linked immunosorbent assay was used to detect the serum levels of malondialdehyde, superoxide dismutase, tumor necrosis factor-α and interleukin-10. Immunofluorescence detection was conducted to detect the phenotypic transformation of macrophages in wound tissue. Immunohistochemistry was used to detect the expression of proliferating cell nuclear antigen, platelet endothelial cell adhesion molecule-1 (CD31) and vascular endothelial growth factor in wound tissue. Western blot was used to detect the expression of Notch1 and Jagged1 in wound tissue. 
RESULTS AND CONCLUSION: (1) Compared with the normal control group, bFGF could significantly promote the proliferation, migration and angiogenesis of human umbilical vein endothelial cells in a dose-dependent manner. (2) Compared with the model group, bFGF could significantly promote wound healing, downregulate the rate of apoptosis in wound tissue, decrease the levels of malondialdehyde and tumor necrosis factor-α in serum, increase the levels of superoxide dismutase and interleukin-10, promote the conversion of macrophages to type M2 in wound tissue, upregulate the expression of proliferating cell nuclear antigen, CD31 and vascular endothelial growth factor in wound tissue, and inhibit the expression of Notch1 and Jagged1 in a dose-dependent manner. Valproic acid could partially reverse the promoting effect of bFGF on wound healing. To conclude, bFGF can significantly promote wound healing and granulation regeneration and induce the conversion of macrophages to M2, which may be related to the regulation of Notch1/Jagged1 signaling pathway.

Key words: basic fibroblast growth factor, full-thickness skin defect, wound, macrophage phenotype transition, granulation regeneration, Notch1, Jagged1

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