Nuclear pro-IL-16 regulation of T cell proliferation:: p27KIP1-dependent G0/G1 arrest mediated by inhibition of Skp2 transcription

Nuclear pro-IL-16 regulation of T cell proliferation:: p27KIP1-dependent G0/G1 arrest mediated by inhibition of Skp2 transcription
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DOI:
10.4049/jimmunol.172.3.1654
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发表时间:
2004-02-01
影响因子:
4.4
通讯作者:
Zhang, YJ
Zhang, YJ
中科院分区:
医学2区
文献类型:
--
作者:
Center, DM;Cruikshank, WW;Zhang, YJ

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IL-16 的前体(pro-IL-16)是一种含有核和细胞质 PDZ 结构域的蛋白质。在这项研究中,我们发现在检查的四种 T 淋巴细胞白血病细胞系中,pro-IL-16 不存在或发生突变。 pro-IL-16 阴性 Jurkat 细胞中 pro-IL-16 的异位表达可阻断细胞周期从 G(0)/G(1) 向 S 期的进展,这与细胞周期蛋白依赖性激酶抑制剂 p27(KIP1) 水平升高相关。 Pro-IL-16 通过减少 Skp2 的转录和随后的表达来减少 p27(KIP1) 降解,Skp2 是 SCFSkp2 泛素 E3 连接酶复合物的关键成分。总而言之,这些发现确定 pro-IL-16 是 Skp2 表达和 p27(KIP1) 水平的新型调节剂,并暗示 pro-IL-16 在 T 细胞增殖中的作用。
The precursor for IL-16 (pro-IL-16) is a nuclear and cytoplasmic PDZ domain-containing protein. In this study we have found that pro-IL-16 is absent or mutated in four T lymphoblastic leukemia cell lines examined. Ectopic expression of pro-IL-16 in pro-IL-16-negative Jurkat cells blocks cell cycle progression from G(0)/G(1) to S phase associated with elevated levels of the cyclin-dependent kinase inhibitor p27(KIP1). Pro-IL-16 decreases p27(KIP1) degradation by reducing transcription and subsequent expression of Skp2, a key component of the SCFSkp2 ubiquitin E3 ligase complex. Taken together, these findings identify pro-IL-16 as a novel regulator of Skp2 expression and p27(KIP1) levels and implicate a role for pro-IL-16 in T cell proliferation.