Wnt5a and CCL25 promote adult T-cell acute lymphoblastic leukemia cell migration, invasion and metastasis.

Wnt5a and CCL25 promote adult T-cell acute lymphoblastic leukemia cell migration, invasion and metastasis.
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Wnt5a和CCL25促进成人T细胞急性淋巴细胞白血病细胞迁移、侵袭和转移

DOI:
10.18632/oncotarget.16559
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发表时间:
2017-06-13
期刊:
影响因子:
--
通讯作者:
Zhang Q
Zhang Q
中科院分区:
其他
文献类型:
--
作者:
Deng X;Tu Z;Xiong M;Tembo K;Zhou L;Liu P;Pan S;Xiong J;Yang X;Leng J;Zhang Q;Xiao R;Zhang Q

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成人T细胞急性淋巴细胞白血病(T-ALL)是一种难治性白血病。我们之前表明 CCL25/CCR9 促进 T-ALL 转移。在本研究中,我们评估了 CCL25 对 Wnt 表达的影响以及 Wnt5a 和 CCL25 对 PI3K/Akt 和 RhoA 激活的影响。利用Transwell实验和小鼠异种移植实验评估Wnt5a和CCL25对MOLT4细胞侵袭、迁移和转移的影响。使用激光扫描共焦显微镜和扫描电子显微镜检查 Wnt5a 对 MOLT4 细胞肌动蛋白极化和伪足形成的影响。 CCL25 通过促进蛋白激酶 C (PKC) 表达和激活来诱导 MOLT4 细胞中 Wnt5a 的表达。 Wnt5a 通过 PI3K/Akt-RhoA 通路激活促进 MOLT4 细胞迁移、侵袭、肌动蛋白极化以及板状伪足和丝状伪足形成。这些效应可以通过 PI3K/Akt 或 RhoA 敲低或抑制来挽救。此外,Wnt5a与CCL25配合促进MOLT4细胞小鼠肝转移并刺激RhoA激活。这些结果表明,CCL25/CCR9 通过促进 MOLT4 细胞中 PKC 的表达和激活来上调 Wnt5a。这反过来又通过 PI3K/Akt-RhoA 信号传导促进细胞迁移和侵袭,增强细胞极化和伪足形成。这些发现表明 PI3K/Akt-RhoA 通路可能负责 Wnt5a 诱导的成体 T-ALL 细胞迁移和侵袭。
Adult T-cell acute lymphoblastic leukemia (T-ALL) is a refractory leukemia. We previously showed that CCL25/CCR9 promotes T-ALL metastasis. In the present study, we assessed the effects of CCL25 on Wnt expression and the effects of Wnt5a and CCL25 on PI3K/Akt and RhoA activation. Transwell assays and mouse xenograft experiments were utilized to assess the effects of Wnt5a and CCL25 on MOLT4 cell invasion, migration and metastasis. The effects of Wnt5a on MOLT4 cell actin polarization and pseudopodium formation were examined using laser scanning confocal microscopy and scanning electron microscopy. CCL25 induced Wnt5a expression in MOLT4 cells by promoting protein kinase C (PKC) expression and activation. Wnt5a promoted MOLT4 cell migration, invasion, actin polarization, and lamellipodium and filopodia formation via PI3K/Akt-RhoA pathway activation. These effects were rescued by PI3K/Akt or RhoA knockdown or inhibition. Additionally, Wnt5a in cooperation with CCL25 promoted MOLT4 cell mouse liver metastasis and stimulated RhoA activation. These results show that CCL25/CCR9 upregulates Wnt5a by promoting PKC expression and activation in MOLT4 cells. This in turn promotes cell migration and invasion via PI3K/Akt-RhoA signaling, enhancing cell polarization and pseudopodium formation. These findings indicate that the PI3K/Akt-RhoA pathway is likely responsible for Wnt5a-induced adult T-ALL cell migration and invasion.
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