E114, CSIR-CCMB, Uppal Road, Hyderabad, 500007, India.
E114, CSIR-CCMB, Uppal Road, Hyderabad, 500007, India.
Biochimie. 2020 Aug;175:125-131. doi: 10.1016/j.biochi.2020.05.014. Epub 2020 Jun 16.
Regeneration is an adaptive phenomenon with wide biological implications spread heterogeneously in almost all the organism including human beings. The ability of regeneration varies from species to species for its complexity. Epimorphic regeneration of zebrafish caudal fin tissue is the most widely studied regeneration mechanism for its discrete and rapid regenerative capability. Several genes and proteins were found to be associated with regenerative mechanisms of zebrafish caudal fin tissue. In this study we have evaluated the functional role of Annexin 2a and 2b genes during zebrafish caudal fin tissue regeneration using inventive electroporation techniques for targeting the gene involving CRISPR-Cas9 technology. The electroporation of the CRISPR was performed on the adult zebrafish caudal fin tissue post amputation. We report retarded growth during the regeneration of caudal fin tissue when Annexin 2a and 2b genes were knocked down, which was validated through gene expression & sequencing analysis and further supported by high-throughput quantitative proteomic analysis of the fin tissue. Annexin family genes such as ANXA13, ANXA1a, ANXA5b were also found to be repressed with their expression. Knocking down of ANXA2a and 2b in regenerating caudal fin tissue compromises regenerating capacity as these genes are involved in cell to cell communication and extracellular matrix growth. This study proves that ANXA2a and 2b plays a significant role in epimorphic regeneration of zebrafish caudal fin tissue.
再生是一种具有广泛生物学意义的适应现象,广泛存在于几乎所有的生物体中,包括人类。由于其复杂性,再生能力因物种而异。斑马鱼尾鳍组织的后生性再生是研究最为广泛的再生机制,因为它具有离散和快速的再生能力。已经发现了几种基因和蛋白质与斑马鱼尾鳍组织的再生机制有关。在这项研究中,我们使用创新的电穿孔技术靶向基因,结合 CRISPR-Cas9 技术,评估了 Annexin 2a 和 2b 基因在斑马鱼尾鳍组织再生过程中的功能作用。在成年斑马鱼尾鳍组织截肢后进行 CRISPR 电穿孔。我们报告说,当 Annexin 2a 和 2b 基因被敲低时,尾鳍组织的再生过程中生长缓慢,这通过基因表达和测序分析得到了验证,并得到了尾鳍组织高通量定量蛋白质组分析的进一步支持。 Annexin 家族基因,如 ANXA13、ANXA1a 和 ANXA5b,也被发现受到抑制,其表达水平降低。在再生的尾鳍组织中敲低 ANXA2a 和 2b 会影响再生能力,因为这些基因参与细胞间通讯和细胞外基质的生长。这项研究证明,ANXA2a 和 2b 在斑马鱼尾鳍组织的后生性再生中起着重要作用。