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ESSENTIAL FUNCTION OF LIF RECEPTOR IN MOTOR NEURONS

机译:LIF受体在运动神经元中的基本功能

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DEVELOPMENT and maintenance of the mammalian nervous system is dependent upon neurotrophic cytokines. One class of neurotrophic factor acts through receptor complexes involving the low-affinity leukaemia inhibitory factor receptor subunit (LIF-R)(1-3). Members of this family of cytokines, such as ciliary neurotrophic factor (CNTF) and leukaemia inhibitory factor (LIF), have profound effects on the survival and maintenance of motor neurons(4-10). Recently it was reported that mice lacking LIF-R die shortly after birth(11) unlike mice lacking CNTF or LIF which are viable. Here we describe histopathological analyses of lifr mutants that reveal a loss >35% of facial motor neurons, 40% of spinal motor neurons and 50% of neurons in the nucleus ambiguus. These findings point to the existence of a ligand for LIF-R that is required for the normal development of motor neurons in both brainstem nuclei and spinal cord.
机译:哺乳动物神经系统的发育和维持取决于神经营养性细胞因子。一类神经营养因子通过涉及低亲和力白血病抑制因子受体亚基(LIF-R)(1-3)的受体复合物起作用。睫状神经营养因子(CNTF)和白血病抑制因子(LIF)等细胞因子家族成员对运动神经元的存活和维持具有深远的影响(4-10)。最近有报道称,缺乏LIF-R的小鼠在出生后不久就会死亡(11),这与缺乏CNTF或LIF的小鼠是可行的。在这里,我们描述了lifr突变体的组织病理学分析,揭示了歧义核中面部运动神经元的损失> 35%,脊髓运动神经元的40%和神经元的50%的损失。这些发现表明存在脑干核和脊髓中运动神经元正常发育所必需的LIF-R配体。

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