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J Dent Res:一个全新的牙齿特异性转录因子:AmeloD

2018-11-23 lishiting MedSci原创

Basic-helix-loop-helix (bHLH)转录因子在多种器官发育中起到了重要作用;然而,从没有关于牙齿特异性bHLH的报道。

Basic-helix-loop-helix (bHLH)转录因子在多种器官发育中起到了重要作用;然而,从没有关于牙齿特异性bHLH的报道。在这篇研究中,作者采用酵母双杂交系统通过筛选一个牙胚互补DNA(cDNA)文库检测出一个全新的牙齿特异性bHLH转录因子,作者将其命名为AmeloD。AmeloD可以与小鼠染色体1q32相匹配。系统发育分析显示,AmeloD属于achaete-scute complex-like ( ASCL)基因家族,并且是ASCL5的同系物。AmeloD特异性的表达于内釉上皮细胞(IEE),但是它的表达在IEE细胞分化为成釉细胞后受到抑制。并且,AmeloD的表达与牙上皮细胞特异性细胞间黏附分子E-cadherin的表达模式相反。在牙上皮细胞系CLDE中过表达AmeloD会导致E-cadherin的表达抑制。研究发现,AmeloD可以与E-cadherin基因启动子近端区域的E-box cis调控元件相结合。这些结果表明,AmeloD可作为IEE细胞内E-cadherin转录的抑制剂。结论:AmeloD是一个全新的牙齿特异性bHLH转录因子,它可能通过抑制IE

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    2019-03-09 mjldent
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    2018-11-25 zhouqu_8
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