吉林大学学报(医学版) ›› 2026, Vol. 52 ›› Issue (2): 299-307.doi: 10.13481/j.1671-587X.20260201

• 基础研究 •    

特异性蛋白1调控脂肪细胞中弗林蛋白酶表达对白脂素分泌的影响及其机制

董振亚1,张鑫铬,邓娅娅,朱井玲1,菅辉玲2(),张云华1()   

  1. 1.新疆地方与民族高发病教育部重点实验室 石河子大学医学院生化教研室,新疆 石河子 832002
    2.新疆维吾尔自治区克拉玛依市中心医院检验科,新疆 克拉玛依 834000
  • 收稿日期:2025-07-05 接受日期:2025-09-02 出版日期:2026-03-28 发布日期:2026-04-15
  • 通讯作者: 菅辉玲,张云华 E-mail:1521003011@qq.com;yunhuazhang@shzu.edu.cn
  • 作者简介:董振亚(1993-),男,湖北省洪湖市人,在读硕士研究生,主要从事代谢性疾病方面的研究。
  • 基金资助:
    国家自然科学基金项目(82260126);国家自然科学基金项目(32460221);新疆生产建设兵团科技局指导性科技计划项目(2024ZD020);新疆维吾尔自治区克拉玛依市中心医院院内项目(20240101)

Effect of Furin expression regulated by specific protein 1 on asprosin secretion in adipocytes and its mechanism

Zhenya DONG1,Xinge ZHANG,Yaya DENG,Jingling ZHU1,Huiling JIAN2(),Yunhua ZHANG1()   

  1. 1.Key Laboratory of Xinjiang Endemic & Ethnic Diseases,Ministry of Education,Department of Biochemistry,School of Medical Sciences,Shihezi University,Shihezi 832002,China
    2.Department of Laboratory,Central Hospital,Karamay City,Xinjiang Uygur Autonomous Region,Karamay 834000,China
  • Received:2025-07-05 Accepted:2025-09-02 Online:2026-03-28 Published:2026-04-15
  • Contact: Huiling JIAN,Yunhua ZHANG E-mail:1521003011@qq.com;yunhuazhang@shzu.edu.cn

摘要:

目的 探讨肥胖状态下脂肪组织弗林蛋白酶(Furin)基因的转录调控机制及其对脂肪因子白脂素分泌的影响。 方法 将24只C57BL/6J雄性小鼠随机分为正常对照饲料(NCD)组和高脂饲料(HFD)组,每组12只。连续喂养12周以构建饮食性肥胖模型。采用实时荧光定量PCR(RT-qPCR)法检测2组小鼠皮下白色脂肪组织(WAT)(sWAT)和附睾WAT(eWAT)中Furin、原纤维蛋白1(FBN1)及候选转录因子特异性蛋白1(SP1)mRNA表达水平。基于真核基因启动子收集与分析联合项目(JASPAR)数据库筛选Furin基因启动子区候选转录因子。在293T细胞中转染特异性蛋白1(SP1)过表达质粒(pcDNA-SP1组)和包含绿色荧光蛋白(GFP)的对照质粒(pcDNA-GFP组),同时将含Furin启动子区的双荧光素酶报告载体与上述质粒共转染,验证SP1与Furin启动子区之间的调控作用。分离sWAT的基质血管组分(SVF)细胞并诱导分化为成熟脂肪细胞,通过腺病毒转导过表达SP1(Ad-SP1组)或GFP对照(Ad-GFP组)。采用Western blotting法和酶联免疫吸附试验(ELISA)法分别检测Ad-GFP组和Ad-SP1组细胞中SP1和Furin 蛋白表达水平及细胞上清液中白脂素水平。 结果 与NCD组比较,HFD组小鼠体质量、sWAT和eWAT质量均明显升高(P<0.001)。与NCD组比较,HFD组小鼠sWAT和eWAT中FurinSP1 mRNA表达水平明显升高(P<0.001)。JASPAR数据库预测提示SP1是调控Furin转录的核心候选因子。双荧光素酶实验,与pcDNA-GFP组比较,pcDNA-SP1组293T细胞中荧光素酶活性明显升高(P<0.001)。与Ad-GFP组比较,Ad-SP1组SVF来源的成熟脂肪细胞中SP1和Furin蛋白表达水平明显升高(P<0.001),细胞上清液中白脂素水平明显升高(P<0.001)。 结论 肥胖小鼠WAT及脂肪细胞中SP1 mRNA表达上调,SP1可通过直接结合Furin启动子区增强其转录活性;SP1过表达可上调脂肪细胞中Furin蛋白表达水平,进而促进白脂素分泌。

关键词: 肥胖, 弗林蛋白酶, 特异性蛋白1, 白脂素, 转录调控

Abstract:

Objective To investigate the transcriptional regulation mechanism of the Furin gene in adipose tissue under obesity conditions and its effect on the secretion of the adipokine asprosin. Methods Twenty-four C57BL/6J mice were randomly divided into normal control diet (NCD) group and high-fat diet (HFD) group, with 12 mice in each group. The mice were fed for 12 consecutive weeks to establish the diet-induced obesity models. Real-time fluorescence quantitative PCR(RT-qPCR) method was used to detect the expression levels of Furin, fibrillin 1 (FBN1), and the candidate transcription factor specificity protein 1 (SP1) mRNA in subcutaneous white adipose tissue(WAT) (sWAT) and epididymal WAT(eWAT) of the mice in two groups. Candidate transcription factors for the Furin gene promoter region were screened based on the JASPAR database. In the 293T cells, the SP1 over-expression plasmid (pcDNA-SP1 group) and its control plasmid containing green fluorescence protein (GFP) (pcDNA-GFP group) were transfected. Simultaneously, a dual-luciferase reporter vector containing the Furin promoter region was co-transfected with the aforementioned plasmids to verify the regulatory interaction between SP1 and the Furin promoter. The stromal vascular fraction (SVF) cells from sWAT were isolated and induced to differentiate into mature adipocytes. SP1 (Ad-SP1 group) or GFP control (Ad-GFP group) was overexpressed via adenoviral transduction. Western blotting method and enzyme-linked immunosorbent assay (ELISA) were used to detect the expression levels of SP1 and Furin proteins in cells in various groups and the levels of asprosin in the cell supernatant in Ad-GFP and Ad-SP1 groups, respectively. Results Compared with NCD group, the body weight, sWAT weight, and eWAT weight of the mice in HFD group were significantly increased (P<0.001). Compared with NCD group, the expression levels of Furin and SP1 mRNA in sWAT and eWAT of the mice in HFD group were significantly increased (P<0.001). JASPAR database prediction suggested that SP1 was a core candidate factor regulating Furin transcription. In the dual-luciferase experiment, compared with pcDNA-GFP group, the luciferase activity in 293T cells in pcDNA-SP1 group was significantly increased (P<0.001). Compared with Ad-GFP group,the expression levels of SP1 and Furin proteins in SVF-derived mature adipocytes in Ad-SP1 group were significantly increased (P<0.001), and the level of asprosin in the cell supernatant was significantly increased (P<0.001). Conclusion The expression of SP1 mRNA in WAT and adipocytes of obese mice was up-regulated. SP1 can enhance the transcriptional activity of Furin by directly binding to its promoter region. SP1 overexpression may upregulate the expression level of Furin protein in adipocytes, promoting the secretion of asprosin.

Key words: Obesity, Furin, Specificity protein 1, Asprosin, Transcriptional regulation

中图分类号: 

  • R363.2