CSF1R mutations in hereditary diffuse leukoencephalopathy with spheroids are loss of function.

CSF1R mutations in hereditary diffuse leukoencephalopathy with spheroids are loss of function.
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DOI:
10.1038/srep03013
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发表时间:
2013-10-22
期刊:
影响因子:
4.6
通讯作者:
Hume, David A.
Hume, David A.
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Pridans, Clare;Sauter, Kristin A.;Baer, Kristin;Kissel, Holger;Hume, David A.

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遗传性弥漫性球白质脑病是一种罕见的常染色体显性遗传病,以中枢神经系统(CNS)白色物质内的巨大神经轴索球(球)为特征。症状是可变的,可能包括个性和行为变化。患有这种疾病的患者在集落刺激因子1受体(CSF1R)的蛋白激酶结构域中具有突变,所述集落刺激因子1受体是小胶质细胞发育所必需的酪氨酸激酶受体。我们研究了这些突变对Csf1r信号转导的影响,使用的因子依赖性细胞系。相应的突变形式的鼠Csf1r在细胞表面上以正常水平表达,并结合CSF 1,但不能维持细胞增殖。由于Csf1r信号传导需要由CSF 1结合引发的受体二聚化,因此数据表明HDLS中突变等位基因的表型显性机制。
Hereditary diffuse leukoencephalopathy with spheroids (HDLS) in humans is a rare autosomal dominant disease characterized by giant neuroaxonal swellings (spheroids) within the CNS white matter. Symptoms are variable and can include personality and behavioural changes. Patients with this disease have mutations in the protein kinase domain of the colony-stimulating factor 1 receptor (CSF1R) which is a tyrosine kinase receptor essential for microglia development. We investigated the effects of these mutations on Csf1r signalling using a factor dependent cell line. Corresponding mutant forms of murine Csf1r were expressed on the cell surface at normal levels, and bound CSF1, but were not able to sustain cell proliferation. Since Csf1r signaling requires receptor dimerization initiated by CSF1 binding, the data suggest a mechanism for phenotypic dominance of the mutant allele in HDLS.
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