Bortezomib inhibits expression of TGF-β1, IL-10, and CXCR4, resulting in decreased survival and migration of cutaneous T cell lymphoma cells.

Bortezomib inhibits expression of TGF-β1, IL-10, and CXCR4, resulting in decreased survival and migration of cutaneous T cell lymphoma cells.
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硼替佐米抑制TGF-β1,IL-10和CXCR4的表达,从而导致皮肤T细胞淋巴瘤细胞的存活率降低和迁移。

DOI:
10.4049/jimmunol.1402610
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发表时间:
2015-03-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Vancurova I
Vancurova I
中科院分区:
其他
文献类型:
--
作者:
Chang TP;Poltoratsky V;Vancurova I

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免疫抑制细胞因子、转化生长因子-β1 (TGFβ1) 和白介素-10 (IL-10) 表达增加是皮肤 T 细胞淋巴瘤 (CTCL) 晚期的标志,与免疫抑制、感染易感性增加和抗肿瘤反应减弱有关。然而,人们对 CTCL 中 TGFβ1 和 IL-10 的转录调控及其在调节 CTCL 细胞反应中的功能知之甚少。在这里,我们发现 CTCL 细胞中 TGFβ1 和 IL-10 的表达受 NFκB 调节,并被硼替佐米 (BZ) 抑制,这在 CTCL 的治疗中显示出有希望的结果。然而,虽然 TGFβ1 表达是 IκBα 依赖性的,并受规范途径调节,但 IL-10 表达是 IκBα 独立性的,并且 BZ 对其的抑制与 p52 启动子募集的增加有关,这是非规范途径的特征。 TGFβ1 抑制会降低 CTCL 细胞活力并增加细胞凋亡,添加外源 TGFβ1 会增加 BZ 处理的 CTCL 细胞的活力,表明 TGFβ1 在 CTCL 细胞中具有促生存功能。此外,抑制TGFβ1会增加CTCL细胞中促炎细胞因子IL-8和IL-17的表达,表明TGFβ1还调节IL-8和IL-17的表达。重要的是,我们的结果表明,BZ 抑制 CTCL 细胞中趋化因子受体 CXCR4 的表达,导致其迁移减少,并且 CTCL 细胞迁移是由 TGFβ1 介导的。这些发现首次深入了解 CTCL 细胞中 BZ 调节的 TGFβ1 和 IL-10 表达,并表明 TGFβ1 在调节 CTCL 存活、炎症基因表达和迁移中发挥关键作用。
Increased expression of the immuno-suppressive cytokines, transforming growth factor-β1 (TGFβ1) and interleukin-10 (IL-10), is a hallmark of the advanced stages of cutaneous T cell lymphoma (CTCL), where it has been associated with suppressed immunity, increased susceptibility to infections, and diminished antitumor responses. Yet, little is known about the transcriptional regulation of TGFβ1 and IL-10 in CTCL, and about their function in regulating the CTCL cell responses. Here, we show that TGFβ1 and IL-10 expression in CTCL cells is regulated by NFκB, and suppressed by bortezomib (BZ), which has shown promising results in the treatment of CTCL. However, while the TGFβ1 expression is IκBα-dependent and is regulated by the canonical pathway, the IL-10 expression is IκBα-independent, and its inhibition by BZ is associated with increased promoter recruitment of p52 that characterizes the non-canonical pathway. TGFβ1 suppression decreases CTCL cell viability and increases apoptosis, and adding exogenous TGFβ1 increases viability of BZ-treated CTCL cells, indicating TGFβ1 pro-survival function in CTCL cells. In addition, TGFβ1 suppression increases expression of the pro-inflammatory cytokines IL-8 and IL-17 in CTCL cells, suggesting that TGFβ1 also regulates the IL-8 and IL-17 expression. Importantly, our results demonstrate that BZ inhibits expression of the chemokine receptor CXCR4 in CTCL cells, resulting in their decreased migration, and that the CTCL cell migration is mediated by TGFβ1. These findings provide the first insights into the BZ-regulated TGFβ1 and IL-10 expression in CTCL cells, and indicate that TGFβ1 has a key role in regulating CTCL survival, inflammatory gene expression, and migration.
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