American Association for Cancer Research
00085472can141651-sup-132524_1_supp_2598118_n9vndr.doc (4.98 MB)

Supplementary Figures 1 - 5, Methods from Globo-H Ceramide Shed from Cancer Cells Triggers Translin-Associated Factor X-Dependent Angiogenesis

Download (4.98 MB)
journal contribution
posted on 2023-03-30, 22:46 authored by Jing-Yan Cheng, Sheng-Hung Wang, Juway Lin, Yi-Chien Tsai, John Yu, Jen-Chine Wu, Jung-Tung Hung, Jin-Jin Lin, Yih-Yiing Wu, Kun-Tu Yeh, Alice L. Yu

Supplementary Figure S1. Globo-H expression on breast cancer cells and shedding of GHCer from MDA-MB-157 cells into MVs. Supplementary Figure S2. Structure of TRAX, PLCβ1 and Globo-H. Supplementary Figure S3. Prediction of secondary structure of PLCβ1. Supplementary Figure S4. Amino-acid sequence alignment of PLCβ1 and PLCβ3. Supplementary Figure S5. Prediction of TRAX-PLCβ1 binding complexes.



Tumor angiogenesis is a critical element of cancer progression, and strategies for its selective blockade are still sought. Here, we examine the angiogenic effects of Globo-H ceramide (GHCer), the most prevalent glycolipid in a majority of epithelial cancers and one that acts as an immune checkpoint. Here, we report that GHCer becomes incorporated into endothelial cells through the absorption of microvesicles shed from tumor cells. In endothelial cells, GHCer addition induces migration, tube formation, and intracellular Ca2+ mobilization in vitro and angiogenesis in vivo. Breast cancer cells expressing high levels of GHCer displayed relatively greater tumorigenicity and angiogenesis compared with cells expressing low levels of Globo-H. Clincally, GHCer+ breast cancer specimens contained higher vessel density than GHCer− breast cancer specimens. Mechanistic investigations linked the angiogenic effects of GHCer to its endocytosis and binding to TRAX, with consequent release of PLCβ1 from TRAX to trigger Ca2+ mobilization. Together, our findings highlight the importance of GHC as a target for cancer therapy by providing new information on its key role in tumor angiogenesis. Cancer Res; 74(23); 6856–66. ©2014 AACR.