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논문 기본 정보

자료유형
학술저널
저자정보
Lee Eunhyeong (KAIST) Lee Eun-Ah (PharmAbcine Inc.) Kong Eunji (KAIST) Chon Haemin (KAIST) Llaiqui-Condori Melissa (KAIST) Park Cheon Ho (PharmAbcine Inc.) Park Beom Yong (PharmAbcine Inc.) Kang Nu Ri (PharmAbcine Inc.) Yoo Jin-San (PharmAbcine Inc.) Lee Hyun-Soo (KAIST) Kim Hyung Seok (Chonnam National University Medical School) Park Sung-Hong (KAIST) Choi Seung-Won (Sungkyunkwan University) Vestweber Dietmar (Max Planck Institute for Molecular Biomedicine) Lee Jeong Ho (KAIST) Kim Pilhan (KAIST) Lee Weon Sup (PharmAbcine Inc.) Kim Injune (KAIST)
저널정보
대한생화학·분자생물학회 Experimental and Molecular Medicine Experimental and Molecular Medicine 제55권
발행연도
2023.2
수록면
470 - 484 (15page)
DOI
10.1038/s12276-023-00939-9

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Tumor progression is intimately associated with the vasculature, as tumor proliferation induces angiogenesis and tumor cells metastasize to distant organs via blood vessels. However, whether tumor invasion is associated with blood vessels remains unknown. As glioblastoma (GBM) is featured by aggressive invasion and vascular abnormalities, we characterized the onset of vascular remodeling in the diffuse tumor infiltrating zone by establishing new spontaneous GBM models with robust invasion capacity. Normal brain vessels underwent a gradual transition to severely impaired tumor vessels at the GBM periphery over several days. Increasing vasodilation from the tumor periphery to the tumor core was also found in human GBM. The levels of vascular endothelial growth factor (VEGF) and VEGF receptor 2 (VEGFR2) showed a spatial correlation with the extent of vascular abnormalities spanning the tumor-invading zone. Blockade of VEGFR2 suppressed vascular remodeling at the tumor periphery, confirming the role of VEGF-VEGFR2 signaling in the invasion-associated vascular transition. As angiopoietin-2 (ANGPT2) was expressed in only a portion of the central tumor vessels, we developed a ligand-independent tunica interna endothelial cell kinase 2 (Tie2)-activating antibody that can result in Tie2 phosphorylation in vivo. This agonistic anti-Tie2 antibody effectively normalized the vasculature in both the tumor periphery and tumor center, similar to the effects of VEGFR2 blockade. Mechanistically, this antibody-based Tie2 activation induced VE-PTP-mediated VEGFR2 dephosphorylation in vivo. Thus, our study reveals that the normal-to-tumor vascular transition is spatiotemporally associated with GBM invasion and may be controlled by Tie2 activation via a novel mechanism of action.

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