Tumor-Derived cGAMP Regulates Activation of the Vasculature.

Tumor-Derived cGAMP Regulates Activation of the Vasculature.
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肿瘤来源的cGAMP调节血管系统的激活。

DOI:
10.3389/fimmu.2020.02090
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发表时间:
2020
影响因子:
7.3
通讯作者:
Barbie DA
Barbie DA
中科院分区:
医学2区
文献类型:
--
作者:
Campisi M;Sundararaman SK;Shelton SE;Knelson EH;Mahadevan NR;Yoshida R;Tani T;Ivanova E;Cañadas I;Osaki T;Lee SWL;Thai T;Han S;Piel BP;Gilhooley S;Paweletz CP;Chiono V;Kamm RD;Kitajima S;Barbie DA

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Intratumoral recruitment of immune cells following innate immune activation is critical for anti-tumor immunity and involves cytosolic dsDNA sensing by the cGAS/STING pathway. We have previously shown that KRAS-LKB1 (KL) mutant lung cancer, which is resistant to PD-1 blockade, exhibits silencing of STING, impaired tumor cell production of immune chemoattractants, and T cell exclusion. Since the vasculature is also a critical gatekeeper of immune cell infiltration into tumors, we developed a novel microfluidic model to study KL tumor-vascular interactions. Notably, dsDNA priming of LKB1-reconstituted tumor cells activates the microvasculature, even when tumor cell STING is deleted. cGAS-driven extracellular export of 2′3′ cGAMP by cancer cells activates STING signaling in endothelial cells and cooperates with type 1 interferon to increase vascular permeability and expression of E selectin, VCAM-1, and ICAM-1 and T cell adhesion to the endothelium. Thus, tumor cell cGAS-STING signaling not only produces T cell chemoattractants, but also primes tumor vasculature for immune cell escape.
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