中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (25): 4041-4046.doi: 10.3969/j.issn.2095-4344.0961

• 干细胞移植 stem cell transplantation • 上一篇    下一篇

少突胶质前体细胞移植联合咪康唑修复脑白质营养不良模型小鼠的髓鞘

吴成君1,苏学文2,汪兆艳1,杨印祥1,栾 佐1   

  1. 1解放军海军总医院儿科,北京市 100048;2内蒙古自治区人民医院儿科,内蒙古自治区呼和浩特市 010017
  • 修回日期:2018-04-04 出版日期:2018-09-08 发布日期:2018-09-08
  • 通讯作者: 栾佐,硕士,主任医师,解放军海军总医院儿科,北京市 100048
  • 作者简介:吴成君,男,1991年生,湖南省衡阳市人,汉族,南方医科大学在读硕士,主要从事儿科神经方向研究。
  • 基金资助:

    国家重点研发计划干细胞及转化研究资助(2017YFA0104200);国家自然科学基金(81471486)

Oligodendrocyte progenitor cell transplantation in combination with miconazole for myelin repair in mice with leukodystrophy

Wu Cheng-jun1, Su Xue-wen2, Wang Zhao-yan1, Yang Yin-xiang1, Luan Zuo1   

  1. 1Department of Pediatrics, Navy General Hospital of PLA, Beijing 100048, China; 2Department of Pediatrics, Inner Mongolia People’s Hospital, Hohhot 010017, Inner Mongolia Autonomous Region, China
  • Revised:2018-04-04 Online:2018-09-08 Published:2018-09-08
  • Contact: Luan Zuo, Master, Chief physician, Department of Pediatrics, Navy General Hospital of PLA, Beijing 100048, China
  • About author:Wu Cheng-jun, Master candidate, Department of Pediatrics, Navy General Hospital of PLA, Beijing 100048, China
  • Supported by:

    the National Key Research and Development Plan for Stem Cell Research and Transformation, No. 2017YFA0104200; the National Natural Science Foundation of China, No. 81471486

摘要:

文章快速阅读:

文题释义:
少突胶质前体细胞:
为中枢神经系统中少突胶质细胞的前体细胞,可在脑发育过程中增殖分化形成少突胶质细胞,后者在中枢神经系统中形成髓鞘。少突胶质前体细胞的成髓鞘功能使其可作为脱髓鞘疾病、中枢神经损伤性疾病等相关疾病治疗的新方法。
髓鞘:是神经系统中包裹轴突从而使轴突绝缘并实现动作电位在轴突上跳跃式传导作用的结构。一般认为少突胶质细胞是中枢神经系统内的成髓鞘细胞,由少突胶质前体细胞分化而来,发出的突起形成髓鞘,并提供营养和保护作用。

 

摘要
背景:
少突胶质前体细胞是中枢神经系统中成髓鞘细胞——少突胶质细胞的前体细胞,与中枢脱髓鞘疾病如脑白质营养不良有着密切关系,最近研究显示咪康唑可促进少突胶质前体细胞分化和髓鞘再生,咪康唑和少突胶质前体细胞二者联合可能用于脑白质营养不良的治疗。
目的:探讨少突胶质前体细胞移植联合咪康唑对脑白质营养不良模型小鼠的髓鞘修复作用。
方法:采用髓鞘碱性蛋白(myelin basic protein,MBP)基因敲除的shiverer小鼠作为脑白质营养不良模型,新出生shi-/-(MBP基因完全缺失)小鼠分为阴性对照组和治疗组,新出生shi+/+(MBP基因正常)小鼠作为阳性对照组。治疗组于生后24 h内移植少突胶质前体细胞,同时在生后1-5 d腹腔注射咪康唑,阴性对照组和阳性对照组分别以PBS和生理盐水代替少突胶质前体细胞和咪康唑。待小鼠8周龄时行MBP免疫荧光染色和Western blot检测MBP蛋白表达,透射电镜观察胼胝体区域髓鞘结构。
结果与结论:①与阴性对照组比较,治疗组MBP荧光表达明显增强,平均荧光强度值差异有显著性意义(P < 0.05),但与阳性对照组比较,治疗组MBP荧光强度显著下降(P < 0.05);②治疗组的MBP蛋白表达量比阴性对照组高,但比阳性对照组低,差异有显著性意义(P < 0.05);③透射电镜下,阴性对照组髓鞘罕见,形态不规则且板层排列松散、紊乱;阳性对照组髓鞘明显增多、增厚,形态均正常且板层排列紧密、边界清晰;治疗组髓鞘数量较阴性对照组增多,部分近似正常,但多数髓鞘厚度仍明显减低;④结果表明,少突胶质前体细胞移植联合咪康唑有助于改善脑白质营养不良的脱髓鞘状况,但不能完全逆转受损髓鞘的病理状态。

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:
0000-0002-8916-994X(吴成君)

关键词: 脑白质营养不良, 髓鞘, 少突胶质前体细胞, 咪康唑, 髓鞘碱性蛋白, 干细胞, 国家自然科学基金

Abstract:

BACKGROUND: Oligodendrocyte progenitor cells are precursor cells of oligodendrocytes that are myelinating cells in the central nervous system. These cells are closely related to central demyelinating diseases such as leukodystrophy. Recent studies have shown that miconazole can promote oligodendrocyte progenitor cell differentiation and myelin regeneration. The combination of miconazole and oligodendrocyte progenitor cells is likely to be used for the treatment of leukodystrophy.
OBJECTIVE: To investigate the effect of oligodendrocyte progenitor cell transplantation combined with miconazole on myelin reparation in mice with leukodystrophy.  
METHODS: Myelin basic protein (MBP) knockout was performed to establish animal models of leukodystrophy in shiverer mice. Twenty-six newborn shi-/- mice were randomly assigned to negative control group and treatment group (n=13 per group). In addition, 13 newborn shi+/+ mice were selected as positive control group. In the treatment group, oligodendrocyte progenitor cells were transplanted within 24 hours after birth, and in the control groups, oligodendrocyte progenitor cells were replaced by PBS. At the same time, in the treatment group miconazole was injected intraperitoneally at 1-5 days after birth, and in the control groups, miconazole was replaced by normal saline. At the age of 8 weeks, MBP immunofluorescence staining and western blot were used to detect MBP protein expression. The myelin sheath structure of the corpus callosum was observed by transmission electron microscopy.
RESULTS AND CONCLUSION: Compared with the negative control group, the MBP expression in the treatment group was significantly enhanced and the average fluorescence intensity was significantly increased (P < 0.05). But when compared with the positive control group, the MBP expression in the treatment group was significantly weakened and the average fluorescence intensity significantly decreased (P < 0.05). Under the transmission electron microscope, the myelin sheath structure in the corpus callosum region was significantly diverse among the groups. In the negative control group, the myelin sheath was rare and irregular, and the lamellar arrangement was loose and disordered. In the positive control group, the myelin was significantly increased in number and thickened. With the normal morphology, the lamellar layer was closely arranged and the boundary was clear. In the treatment group, the number of myelin was significantly higher than that of the negative control group, and some myelin sheaths were normal in shape, but most myelin sheaths were still slender. These findings indicate that oligodendrocyte progenitor cells combined with miconazole helps to improve demyelination in mice with leukodystrophy, but cannot completely reverse the pathological status of damaged myelin.

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: Leukoencephalopathies, Myelin Sheath, Oligodendroglia, Miconazole, Tissue Engineering

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