Cui X, Doe C Q
Department of Cell and Structural Biology, University of Illinois, Urbana 61801.
Development. 1992 Dec;116(4):943-52. doi: 10.1242/dev.116.4.943.
Cell diversity in the Drosophila central nervous system (CNS) is primarily generated by the invariant lineage of neural precursors called neuroblasts. We used an enhancer trap screen to identify the ming gene, which is transiently expressed in a subset of neuroblasts at reproducible points in their cell lineage (i.e. in neuroblast 'sublineages'), suggesting that neuroblast identity can be altered during its cell lineage. ming encodes a predicted zinc finger protein and loss of ming function results in precise alterations in CNS gene expression, defects in axonogenesis and embryonic lethality. We propose that ming controls cell fate within neuroblast cell lineages.
果蝇中枢神经系统(CNS)中的细胞多样性主要由称为神经母细胞的神经前体的不变谱系产生。我们通过增强子陷阱筛选鉴定出了ming基因,该基因在神经母细胞谱系中的可重复点(即在神经母细胞“亚谱系”)的一部分神经母细胞中短暂表达,这表明神经母细胞的特性在其细胞谱系中可能会发生改变。ming编码一种预测的锌指蛋白,ming功能的丧失会导致中枢神经系统基因表达的精确改变、轴突发生缺陷和胚胎致死。我们提出,ming控制神经母细胞谱系中的细胞命运。