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首页> 外文期刊>Critical reviews in oncogenesis >Oncogenes and signal transduction pathways involved in the regulation of Na+ channel expression.
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Oncogenes and signal transduction pathways involved in the regulation of Na+ channel expression.

机译:Na +通道表达的调控涉及致癌基因和信号转导途径。

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Recent progress in neurobiology has revealed that proteins called 'neurotrophic factors' influence development, maintenance of function, and regeneration of neurons in vertebrate nervous system. These factors include the neurotrophin family, epidermal growth factor (EGF), fibroblast growth factor (FGF), and platelet-derived growth factor (PDGF), which are expressed in the nervous system. Effects of the neurotrophic factors are mediated through signal transduction pathways in which several cellular protooncogenes play intrinsic roles. Furthermore, studies on mechanisms coupling membrane events to gene activation have demonstrated that transsynaptic input via action potential and neurotransmitters, and membrane depolarization play an important role in the regulation of electrical activities in neurons during and after maturation. Voltage-dependent sodium (Na+) channels mediate an increase in permeability of Na+ during the initial, rapid phase of the action potential in neurons, and are considered to be important determinants of neuronal functions. Their synthesis and expression, therefore, are crucial aspects of neural differentiation and functions. In mammals, an array of functionally distinct Na+ channels arise, at least in part, through transcriptional regulation of the multiple genes that encode distinct Na+ channel alpha subunits (Na alpha). In this review, we discuss the potential roles of the protooncogenes in the nervous system, with particular emphasis on dynamic expression of the Na+ channel gene family.
机译:神经生物学的最新进展表明,称为“神经营养因子”的蛋白质会影响脊椎动物神经系统中神经元的发育,功能维持和再生。这些因子包括神经营养蛋白家族,表皮生长因子(EGF),成纤维细胞生长因子(FGF)和血小板衍生生长因子(PDGF),它们在神经系统中表达。神经营养因子的作用通过信号转导途径介导,其中几种细胞原癌基因发挥内在作用。此外,有关将膜事件与基因激活耦合的机制的研究表明,经由动作电位和神经递质的突触输入以及膜去极化在成熟过程中和成熟后对神经元电活动的调节中起着重要作用。电压依赖性钠(Na +)通道在神经元动作电位的初始快速阶段介导Na +的通透性增加,被认为是神经元功能的重要决定因素。因此,它们的合成和表达是神经分化和功能的关键方面。在哺乳动物中,至少部分地通过编码编码不同的Na +通道α亚基(Naα)的多个基因的转录调控产生一系列功能上不同的Na +通道。在这篇综述中,我们讨论了原癌基因在神经系统中的潜在作用,尤其着重于Na +通道基因家族的动态表达。

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