中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (1): 107-112.doi: 10.3969/j.issn.2095-4344.0419

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

甲酰基肽受体对神经干/祖细胞向类神经元分化的影响

张 良1,程 惠1,冷明昊1,潘建海1,何祥春1,张一鸣1,卢 山1,陈 华2   

  1. 湖北医药学院附属随州医院,1骨二科,2皮肤科,湖北省随州市 441300
  • 修回日期:2017-08-07 出版日期:2018-01-08 发布日期:2018-01-08
  • 通讯作者: 陈华,主管护师,湖北医药学院附属随州医院皮肤科,湖北省随州市 441300
  • 作者简介:张良,男,1974 年生,湖北省人,汉族,2011 年武汉大学医学院毕业,博士,主治医师,主要从事脊髓损伤基础和临床方面的研究。
  • 基金资助:

    湖北省卫生计生科研基金资助(WJ2015MB228)

Effect of formyl peptide receptor on the differentiation of neural stem/progenitor cells into neurons

Zhang Liang1, Cheng Hui1, Leng Ming-hao1, Pan Jian-hai1, He Xiang-chun1, Zhang Yi-ming1, Lu Shan1, Chen Hua2   

  1. 1Department of Orthopedics, 2Department of Dermatology, Suizhou Hospital Affiliated to Hubei University of Medicine, Suizhou 441300, Hubei Province, China
  • Revised:2017-08-07 Online:2018-01-08 Published:2018-01-08
  • Contact: Chen Hua, Nurse in charge, Department of Dermatology, Suizhou Hospital Affiliated to Hubei University of Medicine, Suizhou 441300, Hubei Province, China
  • About author:Zhang Liang, M.D., Attending physician, Department of Orthopedics, Suizhou Hospital Affiliated to Hubei University of Medicine, Suizhou 441300, Hubei Province, China
  • Supported by:

    the Scientific Research Fund for Health and Family Planning in Hubei Province, No. WJ2015MB22

摘要:

文章快速阅读:

文题释义:
甲酰基肽受体(formyl peptide receptors,FPRs):
甲酰基肽受体的配体存在于损伤或感染的组织中,甲酰基肽受体首先在吞噬性白细胞如中性粒细胞、单核细胞中发现,能促进炎症细胞迁移,增强吞噬能力,增强机体免疫能力。近年来,甲酰基肽受体在非吞噬类细胞中的表达和作用也进行了广泛的研究,如间充质干细胞、神经细胞等。前期研究发现甲酰基肽受体在神经干细胞中也有表达,其合成性配体fMLF或MMK-1能诱导其迁移、分化。由于其配体及其作用的多样性,深入探讨脊髓损伤后其产生的配体通过甲酰基肽受体对神经干/祖细胞的作用,这是一个十分有意义的问题。
神经干/祖细胞:目前常用的提取神经干/祖细胞的方法是从胎鼠的大脑皮质中提取,通过消化胎鼠大脑皮质得到单个细胞,在干细胞培养基中进行培养,形成神经球。以前通常把由此获得的细胞称为神经干细胞,然而研究证实,由此获得的神经球细胞,包括神经干细胞、祖细胞及少量终末分化细胞。如果要提取神经干细胞,必须在此基础上通过神经干细胞标记物筛选,才能得到神经干细胞,因此,如果没有筛选的情况下,统称为神经干/祖细胞。

 

摘要
背景:
前期研究观察到神经干/祖细胞表达甲酰基肽受体(formyl peptide receptors,FPRs),并证实FPRs能促进神经干/祖细胞迁移和诱导神经干细胞向类神经元分化。损伤的组织中存在FPRs配体,然而不同的配体与FPRs的结合可能导致不同、甚至相反的生物学效应。
目的:探讨脊髓损伤产生的配体与FPRs作用后对神经干/祖细胞向类神经元分化的影响。
方法:免疫荧光染色、Western blotting和流式细胞仪分析FPRs在神经干/祖细胞中的表达;免疫荧光染色共聚焦显微镜观察脊髓匀浆对FPR1或FPR2阳性神经干/祖细胞分化的影响。
结果与结论:①部分神经干/祖细胞表达FPR1和FPR2,不仅在细胞膜上有表达,在细胞质中也有表达,FPR1的表达水平明显低于FPR2的表达水平;②脊髓匀浆液能够使FPR1或FPR2阳性神经干/祖细胞分化后产生的β-Ⅲ tubulin阳性神经元比例升高、GFAP阳性星形胶质细胞比例降低,这种作用能够被FPR1或FPR2阻断剂Boc2或WRW4阻断;③这些实验结果说明,脊髓匀浆液能够促进FPR1或FPR2阳性神经干/祖细胞向类神经元分化,抑制其向星形胶质细胞分化,同时这种作用具有特异性。

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: 0000-0003-1097-1874(张良)

关键词: 干细胞, 甲酰基肽受体, 神经干/祖细胞, 分化, 脊髓损伤, 修复

Abstract:

BACKGROUND: Previous studies have observed the expression of formyl peptide receptors (FPRs) in neural stem/progenitor cells (NSPCs) and confirmed that FPRs can promote the migration of NSPCs and induce them to differentiate into neurons. FPRs ligands are present in damaged tissues, but the binding of different ligands with FPRs may lead to different and even opposite biological effects.
OBJECTIVE: To investigate the effect on the differentiation of NSPCs into neurons after the binding of the ligands produced following spinal cord injury with FPRs.
METHODS: Immunofluorescence staining, western blot and flow cytometry were used to analyze the expression of FPRs in NSPCs. Immunofluorescent staining with confocal microscope detection was used to analyze the effect of homogenates of the spinal cord on the differentiation of FPR1+ or FPR2+ NSPCs into neurons.
RESULTS AND CONCLUSION: Some of NSPCs expressed FPR1 and FPR2, not only on the cell membrane, but also in the cytoplasm. The expression level of FPR1 was obviously lower than that of FPR2. The homogenate group for FPR1+ or FPR2+ NSPCs could produce more β-III tubulin-positive cells and fewer GFAP-positive astrocytes, and the effects could be blocked by FPR1 or FPR2 inhibitor Boc2 or WRW4. These experimental findings show that the spinal cord homogenate can induce FPR1 or FPR2 positive NSPCs to differentiate into neurons and inhibit their differentiation to astrocytes, and moreover, this effect is specific.

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

Key words: Neural Stem Cells, Receptors, Formyl Peptide, Spinal Cord Injuries, Cell Differentiation, Tissue Engineering

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