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斑马鱼鳍再生过程中细胞外基质的动态重塑

Dynamic remodeling of the extra cellular matrix during zebrafish fin regeneration.

作者信息

Govindan Jayalakshmi, Iovine M Kathryn

机构信息

Department of Biological Sciences, Lehigh University, USA.

Department of Biological Sciences, Lehigh University, USA.

出版信息

Gene Expr Patterns. 2015 Sep-Nov;19(1-2):21-9. doi: 10.1016/j.gep.2015.06.001. Epub 2015 Jun 21.

Abstract

Extracellular matrix plays a dynamic role during the process of wound healing, embryogenesis and tissue regeneration. Caudal fin regeneration in zebrafish is an excellent model to study tissue and skeletal regeneration. We have analyzed the expression pattern of some of the well characterized ECM proteins during the process of caudal fin regeneration in zebrafish. Our results show that a transitional matrix analogous to the one formed during newt skeletal and heart muscle regeneration is synthesized during fin regeneration. Here we demonstrate that a provisional matrix rich in hyaluronic acid, tenascin C, and fibronectin is synthesized following amputation. Additionally, we observed that the link protein Hapln1a dependent ECM, consisting of Hapln1a, hyaluronan and proteoglycan aggrecan, is upregulated during fin regeneration. Laminin, the protein characteristic of differentiated tissues, showed only modest change in the expression pattern. Our findings on zebrafish fin regeneration implicates that changes in the extracellular milieu represent an evolutionarily conserved mechanism that proceeds during tissue regeneration, yet with distinct players depending on the type of tissue that is involved.

摘要

细胞外基质在伤口愈合、胚胎发育和组织再生过程中发挥着动态作用。斑马鱼的尾鳍再生是研究组织和骨骼再生的优秀模型。我们分析了斑马鱼尾鳍再生过程中一些特征明确的细胞外基质蛋白的表达模式。我们的结果表明,在鳍再生过程中合成了一种类似于蝾螈骨骼和心肌再生过程中形成的过渡基质。在此我们证明,截肢后会合成富含透明质酸、腱生蛋白C和纤连蛋白的临时基质。此外,我们观察到由Hapln1a、透明质酸和蛋白聚糖聚集蛋白聚糖组成的连接蛋白Hapln1a依赖性细胞外基质在鳍再生过程中上调。层粘连蛋白是分化组织的特征性蛋白,其表达模式仅发生适度变化。我们对斑马鱼尾鳍再生的研究结果表明,细胞外环境的变化代表了一种在组织再生过程中进化保守的机制,但根据所涉及的组织类型,参与的成分有所不同。

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