当前位置: X-MOL 学术Signal Transduct. Target Ther. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Both IDO1 and TDO contribute to the malignancy of gliomas via the Kyn-AhR-AQP4 signaling pathway.
Signal Transduction and Targeted Therapy ( IF 40.8 ) Pub Date : 2020-02-21 , DOI: 10.1038/s41392-019-0103-4
Lisha Du 1 , Zikang Xing 1 , Bangbao Tao 2 , Tianqi Li 1 , Dan Yang 1 , Weirui Li 1 , Yuanting Zheng 1 , Chunxiang Kuang 3 , Qing Yang 1, 4
Affiliation  

Indoleamine 2,3-dioxygenase 1 (IDO1), indoleamine 2,3-dioxygenase 2 (IDO2), and tryptophan 2,3-dioxygenase (TDO) initiate the first step of the kynurenine pathway (KP), leading to the transformation of L-tryptophan (Trp) into L-kynurenine (Kyn) and other downstream metabolites. Kyn is known as an endogenous ligand of the aryl hydrocarbon receptor (AhR). Activation of AhR through TDO-derived Kyn is a novel mechanism to support tumor growth in gliomas. However, the role of IDO1 and IDO2 in this mechanism is still unknown. Herein, by using clinical samples, we found that the expression and activity of IDO1 and/or TDO (IDO1/TDO) rather than IDO2 were positively correlated with the pathologic grades of gliomas. The expression of IDO1/TDO rather than IDO2 was positively correlated with the Ki67 index and overall survival. The expression of IDO1/TDO was positively correlated with the expression of aquaporin 4 (AQP4), implying the potential involvement of IDO1/TDO in glioma cell motility. Mechanistically, we found that IDO1/TDO accounted for the release of Kyn, which activated AhR to promote cell motility via the Kyn-AhR-AQP4 signaling pathway in U87MG glioma cells. RY103, an IDO1/TDO dual inhibitor, could block the IDO1/TDO-Kyn-AhR-AQP4 signaling pathway and exert anti-glioma effects in GL261 orthotopic glioma mice. Together, our results showed that the IDO1/TDO-Kyn-AhR-AQP4 signaling pathway is a new mechanism underlying the malignancy of gliomas, and suggest that both IDO1 and TDO might be valuable therapeutic targets for gliomas.

中文翻译:

IDO1 和 TDO 都通过 Kyn-AhR-AQP4 信号通路促进胶质瘤的恶性发展。

吲哚胺 2,3-双加氧酶 1 (IDO1)、吲哚胺 2,3-双加氧酶 2 (IDO2) 和色氨酸 2,3-双加氧酶 (TDO) 启动犬尿氨酸途径 (KP) 的第一步,导致 L -色氨酸 (Trp) 转化为 L-犬尿氨酸 (Kyn) 和其他下游代谢物。Kyn 被称为芳烃受体 (AhR) 的内源性配体。通过 TDO 衍生的 Kyn 激活 AhR 是一种支持胶质瘤中肿瘤生长的新机制。然而,IDO1和IDO2在该机制中的作用尚不清楚。在此,我们通过临床样本发现,IDO1和/或TDO(IDO1/TDO)的表达和活性与胶质瘤的病理分级呈正相关,而不是IDO2。IDO1/TDO 而不是 IDO2 的表达与 Ki67 指数和总生存率呈正相关。IDO1/TDO 的表达与水通道蛋白 4(AQP4)的表达呈正相关,表明 IDO1/TDO 可能参与胶质瘤细胞运动。从机制上讲,我们发现 IDO1/TDO 解释了 Kyn 的释放,Kyn 激活了 AhR 以通过 U87MG 神经胶质瘤细胞中的 Kyn-AhR-AQP4 信号通路促进细胞运动。RY103 是一种 IDO1/TDO 双重抑制剂,可以阻断 IDO1/TDO-Kyn-AhR-AQP4 信号通路并在 GL261 原位胶质瘤小鼠中发挥抗胶质瘤作用。总之,我们的结果表明 IDO1/TDO-Kyn-AhR-AQP4 信号通路是胶质瘤恶性的新机制,并表明 IDO1 和 TDO 都可能是胶质瘤的有价值的治疗靶点。从机制上讲,我们发现 IDO1/TDO 解释了 Kyn 的释放,Kyn 激活了 AhR 以通过 U87MG 神经胶质瘤细胞中的 Kyn-AhR-AQP4 信号通路促进细胞运动。RY103 是一种 IDO1/TDO 双重抑制剂,可以阻断 IDO1/TDO-Kyn-AhR-AQP4 信号通路并在 GL261 原位胶质瘤小鼠中发挥抗胶质瘤作用。总之,我们的结果表明 IDO1/TDO-Kyn-AhR-AQP4 信号通路是胶质瘤恶性的新机制,并表明 IDO1 和 TDO 都可能是胶质瘤的有价值的治疗靶点。从机制上讲,我们发现 IDO1/TDO 解释了 Kyn 的释放,Kyn 激活了 AhR 以通过 U87MG 神经胶质瘤细胞中的 Kyn-AhR-AQP4 信号通路促进细胞运动。RY103 是一种 IDO1/TDO 双重抑制剂,可以阻断 IDO1/TDO-Kyn-AhR-AQP4 信号通路并在 GL261 原位胶质瘤小鼠中发挥抗胶质瘤作用。总之,我们的结果表明 IDO1/TDO-Kyn-AhR-AQP4 信号通路是胶质瘤恶性的新机制,并表明 IDO1 和 TDO 都可能是胶质瘤的有价值的治疗靶点。可以阻断 IDO1/TDO-Kyn-AhR-AQP4 信号通路并在 GL261 原位胶质瘤小鼠中发挥抗胶质瘤作用。总之,我们的结果表明 IDO1/TDO-Kyn-AhR-AQP4 信号通路是胶质瘤恶性的新机制,并表明 IDO1 和 TDO 都可能是胶质瘤的有价值的治疗靶点。可以阻断 IDO1/TDO-Kyn-AhR-AQP4 信号通路并在 GL261 原位胶质瘤小鼠中发挥抗胶质瘤作用。总之,我们的结果表明 IDO1/TDO-Kyn-AhR-AQP4 信号通路是胶质瘤恶性的新机制,并表明 IDO1 和 TDO 都可能是胶质瘤的有价值的治疗靶点。
更新日期:2020-02-21
down
wechat
bug