中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (31): 4996-5001.doi: 10.12307/2022.780

• 脂肪干细胞 adipose-derived stem cells • 上一篇    下一篇

脂肪干细胞携载汉黄芩苷聚己内酯-聚乙二醇胶束的制备

王  笑1,刘  卿1,胡瑶蕊1,谷成旭1,郭绮萱1,朱永林2,张璐萍1   

  1. 1滨州医学院基础医学院人体解剖学教研室,山东省烟台市   264000;2滨州医学院烟台附属医院骨科,山东省烟台市   264000
  • 收稿日期:2021-11-02 接受日期:2021-12-28 出版日期:2022-11-08 发布日期:2022-04-24
  • 通讯作者: 张璐萍,博士,副教授,滨州医学院基础医学院解剖学教研室,山东省烟台市 264000
  • 作者简介:王笑,女,1995年生,山东省泰安市人,汉族,滨州医学院在读硕士,主要从事脊髓损伤修复研究。
  • 基金资助:
    烟台市科技计划项目(2021YD067),项目负责人:朱永林

Preparation of wogonoside polycaprolactone-polyethylene glycol micelles delivered by adipose stem cells

Wang Xiao1, Liu Qing1, Hu Yaorui1, Gu Chengxu1, Guo Qixuan1, Zhu Yonglin2, Zhang Luping1   

  1. 1Department of Human Anatomy, Basic Medical Sciences, Binzhou Medical University, Yantai 264000, Shandong Province, China; 2Department of Orthopedics, Yantai Affiliated Hospital of Binzhou Medical University, Yantai 264000, Shandong Province, China
  • Received:2021-11-02 Accepted:2021-12-28 Online:2022-11-08 Published:2022-04-24
  • Contact: Zhang Luping, PhD, Associate professor, Department of Human Anatomy, Basic Medical Sciences, Binzhou Medical University, Yantai 264000, Shandong Province, China
  • About author:Wang Xiao, Master candidate, Department of Human Anatomy, Basic Medical Sciences, Binzhou Medical University, Yantai 264000, Shandong Province, China
  • Supported by:
    Science and Technology Project of Yantai, No. 2021YD067 (to ZYL)

摘要:

文题释义:
聚己内酯:是一种生物相容性、可生物降解和无毒的热塑性聚酯。
聚乙二醇:是目前应用最广泛的生物相容性高分子化合物之一,是已投入临床使用的各类药物和治疗剂的主要成分。

背景:汉黄芩苷已被证明有抗炎、神经保护等多种药理活性作用,但其半衰期短、难溶于水,有机溶剂溶解后不良反应大。研究发现,聚己内酯-聚乙二醇能够结合高度疏水的药物,解决药物难溶问题且可以达到缓释的效果,但无法精确靶向到达损伤部位,制成胶束后因其尺寸小,可以穿透细胞膜。
目的:制备汉黄芩苷聚己内酯-聚乙二醇胶束以及脂肪干细胞携载汉黄芩苷聚己内酯-聚乙二醇胶束,以解决汉黄芩苷难溶性和半衰期短的问题,并使药物能靶向到达损伤部位。
方法:透析法制备汉黄芩苷聚己内酯-聚乙二醇胶束,对其进行表征,检测包封率和载药量及体外释药速率。采用胶原酶消化法制备SD大鼠脂肪干细胞,流式细胞术、免疫组化、免疫荧光检测CD90、CD44、CD45的表达,成脂诱导14 d后进行油红O染色。CCK-8法检测汉黄芩苷聚己内酯-聚乙二醇胶束对脂肪干细胞的毒性。香豆素6和汉黄芩苷胶束与脂肪干细胞共孵育进行细胞定位。
结果与结论:①汉黄芩苷聚己内酯-聚乙二醇胶束平均粒径为(26.7±0.4) nm,Zeta电势为(-33.2±0.3) mV,外观为比较均一的圆球型;②汉黄芩苷聚己内酯-聚乙二醇胶束包封率为(90.2±2.04)%,载药量为(9.18±0.31)%;③游离汉黄芩苷24 h累计释放率为98%,汉黄芩苷聚己内酯-聚乙二醇胶束96 h累计释放率为87%;④流式细胞术、免疫组化、免疫荧光结果显示,脂肪干细胞表面标志CD90、CD44高表达,CD45几乎不表达,成脂诱导后油红O染色显示脂滴呈红色;⑤CCK-8结果显示,胶束质量浓度在10-200 mg/L时,对脂肪干细胞无毒性;⑥激光共聚焦显微镜观察可见,香豆素6和汉黄芩苷聚己内酯-聚乙二醇胶束能进入脂肪干细胞线粒体;⑦结果表明,汉黄芩苷聚己内酯-聚乙二醇胶束可进入脂肪干细胞内,脂肪干细胞可携载汉黄芩苷聚己内酯-聚乙二醇胶束。
缩略语:聚己内酯-聚乙二醇:polycaprolactone- polyethylene glycol,PCL-PEG

https://orcid.org/0000-0002-9424-5812 (王笑) 

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

关键词: 汉黄芩苷, 聚己内酯, 聚乙二醇, 胶束, 表征, 体外释放, 脂肪干细胞

Abstract: BACKGROUND: Wogonoside has been proven to have anti-inflammatory, neuroprotective and other pharmacological activities. Wogonoside is difficult to dissolve in water and has a short half-life. In an organic solvent, wogonoside may bring patients with serious adverse reactions. Polycaprolactone-polyethylene glycol can combine highly hydrophobic drugs and achieve sustained release, but cannot accurately target the lesion. Micelles, because of their small size, can penetrate cell membranes.
OBJECTIVE: To prepare wogonoside polycaprolactone-polyethylene glycol micelles and adipose stem cells as a carrier to deliver wogonoside polycaprolactone-polyethylene glycol micelles so as to overcome the insolubility and short half-life of wogonoside and enable the drug to target the damage site.
METHODS: Wogonoside polycaprolactone-polyethylene glycol micelles were prepared by dialysis method and characterized. Encapsulation rate, drug loading and in vitro drug release rate were detected. SD rat adipose stem cells were prepared by collagenase digestion. The expression of CD90, CD44, and CD45 was detected by flow cytometry, immunohistochemistry, and immunofluorescence. After 14 days of adipocytes induction, oil red O staining was performed. CCK8 assay was used to detect cytotoxicity of wogonoside polycaprolactone-polyethylene glycol micelles to adipose stem cells. The micelles of coumarin 6 and wogonoside were co-incubated with adipose stem cells for cell localization. 
RESULTS AND CONCLUSION: (1) The wogonoside polycaprolactone-polyethylene glycol micelles had a mean particle size of (26.7±0.4) nm, a Zeta potential of (-33.2±0.3) mV, and a relatively uniform shape of round ball. (2) The encapsulation rate of wogonoside polycaprolactone-polyethylene glycol micelles was (90.2±2.04)% and the drug loading was (9.18±0.31)%. (3) The cumulative release rate of free wogonoside was 98% for 24 hours, and that of wogonoside polycaprolactone-polyethylene glycol micelles was 87% for 96 hours. (4) Flow cytometry, immunohistochemistry, and immunofluorescence showed that CD90 and CD44 were highly expressed, while CD45 was almost not. Oil red O staining showed red droplets after lipid induction. (5) CCK8 assay showed that the micellar mass concentration in the range of 10-200 mg/L had no effect on cells. (6) Confocal laser confocal results showed that coumarin 6 and wogonoside polycaprolactone-polyethylene glycol micelles could enter the mitochondria of adipose stem cells. (7) The results showed that the wogonoside polycaprolactone-polyethylene glycol micelles could enter adipose stem cells, and adipose stem cells could carry wogonoside polycaprolactone-polyethylene glycol micelles.  wogonoside; polycaprolactone; polyethylene glycol; micelles; characterization; in vitro release; adipose stem cells

Key words: wogonoside, polycaprolactone, polyethylene glycol, micelles, characterization, in vitro release, adipose stem cells

中图分类号: