Rheostatic signaling by CD44 and hyaluronan.

Rheostatic signaling by CD44 and hyaluronan.
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DOI:
10.1016/j.cellsig.2009.01.024
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发表时间:
2009-05
影响因子:
4.8
通讯作者:
Assoian, Richard K.
Assoian, Richard K.
中科院分区:
生物学2区
文献类型:
--
作者:
Pure, Ellen;Assoian, Richard K.

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细胞功能和适应行为通常由响应于局部组织微环境而产生的信号驱动。检测细胞外基质组成的变化和细胞外基质组分的修饰的细胞表面受体被理想地定位为提供微环境变化的高度响应性传感器,并介导维持组织完整性所需的细胞功能的变化。受体可以充当“开/关”开关,但提供“变阻”控制的配体/受体复合物可能更敏感,提供更快速的控制机制,并允许微调细胞对微环境的反应。在此,我们审查的证据表明,在细胞外的糖胺聚糖透明质酸的理化性质和其主要受体,CD 44的功能,差异调节ERK和Rac信号转导通路,提供关键的变阻控制间充质细胞增殖的转变。
Cellular function and adaptive behavior is often driven by signals generated in response to the local tissue microenvironment. Cell surface receptors that detect changes in extracellular matrix composition and modifications to extracellular matrix components, are ideally positioned to provide highly responsive sensors of changes in the microenvironment and mediate changes in cellular function required to maintain tissue integrity. Receptors can act as “on/off” switches, but ligand/receptor complexes that provide “rheostatic” control may be more sensitive, provide a more rapid mechanism of control and allow for fine-tuning of cellular responses to the microenvironment. Herein, we review evidence that transitions in the physiochemical properties of the extracellular glycosaminoglycan hyaluronan and in the function of its major receptor, CD44, differentially regulate ERK and Rac signal transduction pathways to provide critical rheostatic control of mesenchymal cell proliferation.
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