Cofilin activation in peripheral CD4 T cells of HIV-1 infected patients: a pilot study.

Cofilin activation in peripheral CD4 T cells of HIV-1 infected patients: a pilot study.
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DOI:
10.1186/1742-4690-5-95
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发表时间:
2008-10-17
期刊:
影响因子:
3.3
通讯作者:
Schlauch K
Schlauch K
中科院分区:
医学2区
文献类型:
--
作者:
Wu Y;Yoder A;Yu D;Wang W;Liu J;Barrett T;Wheeler D;Schlauch K

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Cofilin是一种肌动蛋白解聚因子,调节T细胞迁移和T细胞活化的关键肌动蛋白动力学。在未受刺激的静息CD 4 T细胞中,cofilin主要以磷酸化的无活性形式存在。以前,我们证明了在HIV-1感染静息CD 4 T细胞期间,病毒的粘附-CXCR 4信号转导激活cofilin以克服静态皮质肌动蛋白限制。在这项初步研究中,我们扩展了这种体外观察,并检查了从HIV-1感染患者外周血中纯化的静息CD 4 T细胞中的cofilin磷酸化。在这里,我们报告说,感染患者的静息T细胞携带显着更高水平的活性cofilin,这表明这些静息细胞已在体内引发cofilin活性,以促进HIV-1感染。HIV-1介导的cofilin的异常激活也可能导致T细胞迁移和激活的异常,这可能有助于病毒的发病机制。
Cofilin is an actin-depolymerizing factor that regulates actin dynamics critical for T cell migration and T cell activation. In unstimulated resting CD4 T cells, cofilin exists largely as a phosphorylated inactive form. Previously, we demonstrated that during HIV-1 infection of resting CD4 T cells, the viral envelope-CXCR4 signaling activates cofilin to overcome the static cortical actin restriction. In this pilot study, we have extended this in vitro observation and examined cofilin phosphorylation in resting CD4 T cells purified from the peripheral blood of HIV-1-infected patients. Here, we report that the resting T cells from infected patients carry significantly higher levels of active cofilin, suggesting that these resting cells have been primed in vivo in cofilin activity to facilitate HIV-1 infection. HIV-1-mediated aberrant activation of cofilin may also lead to abnormalities in T cell migration and activation that could contribute to viral pathogenesis.
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发表时间: 2005-01-01
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