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Mathematical modelling and experiments for the proliferation and differentiation of Drosophila intestinal stem cells II

机译:果蝇肠道干细胞增殖与分化的数学模型与实验II

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The Drosophila posterior midgut epithelium mainly consists of intestinal stem cells (ISCs); semi-differentiated cells, i.e. enteroblasts (EBs); and two types of fully differentiated cells, i.e. enteroendocrine cells (EEs) and enterocytes (ECs), which are controlled by signalling pathways. In [M. Kuwamura, K. Maeda, and T. Adachi-Yamada, Mathematical modeling and experiments for the proliferation and differentiation of Drosophila intestinal stem cells I , J. Biol. Dyn. 4 (2009), pp. 248?¢????257], on the basis of the functions of the Wnt and Notch signalling pathways, we studied the regulatory mechanism for the proliferation and differentiation of ISCs under the assumption that the Wnt proteins are supplied from outside the cellular system of ISCs. In this paper, we experimentally show that the Wnt proteins are specifically expressed in ISCs, EBs, and EEs, and theoretically show that the cellular system of ISCs can be self-maintained under the assumption that the Wnt proteins are produced in the cellular system of ISCs. These results provide a useful basis for determining whether an environmental niche is required for maintaining the cellular system of tissue stem cells.
机译:果蝇后中肠上皮主要由肠道干细胞(ISCs)组成。半分化细胞,即成肠细胞(EBs);以及两种完全分化的细胞,即肠内分泌细胞(EEs)和肠上皮细胞(ECs),它们受信号传导途径控制。在[M. Kuwamura,K.Maeda和T.Adachi-Yamada,果蝇肠干细胞增殖和分化的数学模型和实验。达因4(2009),第248页257),基于Wnt和Notch信号通路的功能,我们在Wnt蛋白假设下研究了ISC增殖和分化的调控机制。由ISC的蜂窝系统外部提供。在本文中,我们通过实验证明Wnt蛋白在ISC,EB和EE中特异性表达,并且从理论上讲,假设Wnt蛋白是在ISC,EB和EE的细胞系统中产生的,那么ISC的细胞系统可以自我维持。 ISC。这些结果为确定维持组织干细胞的细胞系统是否需要环境环境提供了有用的基础。

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