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Gene expression in regenerating and scarring tails of lizard evidences three main key genes (wnt2b, egfl6, and arhgap28) activated during the regulated process of tail regeneration
Protoplasma ( IF 2.5 ) Pub Date : 2020-08-27 , DOI: 10.1007/s00709-020-01545-6
Massimo Degan 1 , Luisa Dalla Valle 2 , Lorenzo Alibardi 3, 4
Affiliation  

We have analyzed the expression of key genes orchestrating tail regeneration in lizard under normal and scarring conditions after cauterization. At 1-day post-cauterization (1 dpc), the injured blastema contains degenerating epithelial and mesenchymal cells, numerous mast cells, and immune cells. At 3 and 7 dpc, a stratified wound epidermis is forming while fibrocytes give rise to a scarring connective tissue. Oncogenes such as wnt2b , egfl6 , wnt6 , and mycn and the tumor suppressor arhgap28 are much more expressed than other oncogenes ( hmga2 , rhov , fgf8 , fgfr4 , tert , shh ) and tumor suppressors ( apcdd1 , p63 , rb , fat2 , bcl11b ) in the normal blastema and at 7 dpc. Blastemas at 3 dpc feature the lowest upregulation of most genes, likely derived from damage after cauterization. Immunomodulator genes nfatc4 and lef1 are more expressed at 7 dpc than in normal blastema and 3 dpc suggesting the induction of immune response favoring scarring. Balanced over-expression of oncogenes, tumor suppressor genes, and immune modulator genes determines regulation of cell proliferation (anti-oncogenic), of movement (anti-metastatic), and immunosuppression in the normal blastema. Significant higher expression of oncogenes wnt2b and egfl6 in normal blastema and higher expression of the tumor suppressor arhgap28 in the 7 dpc blastema indicate that they are among the key/master genes that determine the regulated regeneration of the tail.

中文翻译:

蜥蜴尾巴再生和瘢痕形成中的基因表达表明三个主要的关键基因(wnt2b、egfl6 和 arhgap28)在尾巴再生的调节过程中被激活

我们已经分析了在烧灼后正常和疤痕条件下协调蜥蜴尾部再生的关键基因的表达。在烧灼后 1 天 (1 dpc),受伤的胚泡包含退化的上皮和间充质细胞、大量肥大细胞和免疫细胞。在 3 和 7 dpc,分层的伤口表皮正在形成,而纤维细胞产生结缔组织疤痕。wnt2b , egfl6 , wnt6 , mycn 和抑癌基因arhgap28 等癌基因的表达比其他癌基因( hmga2 , rhov , fgf8 , fgfr4 , tert , shh ) 和抑癌基因( apcdd1 , b61b, cl fat )高得多。在正常胚芽和 7 dpc 中。3 dpc 的 Blastema 具有大多数基因的最低上调,可能来自烧灼后的损伤。免疫调节基因 nfatc4 和 lef1 在 7 dpc 比在正常胚泡和 3 dpc 中表达更多,表明诱导了有利于疤痕形成的免疫反应。癌基因、肿瘤抑制基因和免疫调节基因的平衡过度表达决定了正常胚细胞中细胞增殖(抗癌基因)、运动(抗转移)和免疫抑制的调节。癌基因 wnt2b 和 egfl6 在正常胚细胞中的显着更高表达和肿瘤抑制基因 arhgap28 在 7 dpc 胚细胞中的更高表达表明它们是决定尾部受调节再生的关键/主基因之一。免疫调节基因决定正常胚细胞中细胞增殖(抗癌)、运动(抗转移)和免疫抑制的调节。癌基因 wnt2b 和 egfl6 在正常胚细胞中的显着更高表达和肿瘤抑制基因 arhgap28 在 7 dpc 胚细胞中的更高表达表明它们是决定尾部受调节再生的关键/主基因之一。免疫调节基因决定正常胚细胞中细胞增殖(抗癌)、运动(抗转移)和免疫抑制的调节。癌基因 wnt2b 和 egfl6 在正常胚细胞中的显着更高表达和肿瘤抑制基因 arhgap28 在 7 dpc 胚细胞中的更高表达表明它们是决定尾部受调节再生的关键/主基因之一。
更新日期:2020-08-27
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