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Temporal phosphoproteomic analysis of VEGF-A signaling in HUVECs: an insight into early signaling events associated with angiogenesis

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Abstract

Vascular endothelial growth factor-A (VEGF-A) is one of the primary factors promoting angiogenesis in endothelial cells. Although defects in VEGF-A signaling are linked to diverse pathophysiological conditions, the early phosphorylation-dependent signaling events pertinent to VEGF-A signaling remain poorly defined. Hence, a temporal quantitative phosphoproteomic analysis was performed in human umbilical vein endothelial cells (HUVECs) treated with VEGF-A-165 for 1, 5 and 10 min. This led to the identification and quantification of 1971 unique phosphopeptides corresponding to 961 phosphoproteins and 2771 phosphorylation sites in total. Specifically, 69, 153, and 133 phosphopeptides corresponding to 62, 125, and 110 phosphoproteins respectively, were temporally phosphorylated at 1, 5, and 10 min upon addition of VEGF-A. These phosphopeptides included 14 kinases, among others. This study also captured the phosphosignaling events directed through RAC, FAK, PI3K-AKT-MTOR, ERK, and P38 MAPK modules with reference to our previously assembled VEGF-A/VEGFR2 signaling pathway map in HUVECs. Apart from a significant enrichment of biological processes such as cytoskeleton organization and actin filament binding, our results also suggest a role of AAK1-AP2M1 in the regulation of VEGFR endocytosis. Taken together, the temporal quantitative phosphoproteomics analysis of VEGF signaling in HUVECs revealed early signaling events and we believe that this analysis will serve as a starting point for the analysis of differential signaling across VEGF members toward the full elucidation of their role in the angiogenesis processes.

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Workflow for the identification of early phosphorylation events induced by VEGF-A-165 in HUVEC cells

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Data availability

The data supporting this study's finding is in this article and its supplementary information. The mass spectrometry proteomics data have been deposited to the ProteomeXchange Consortium (http://www.proteomecentral.proteomexchange.org) via the PRIDE partner repository with the dataset identifier PXD038133.

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Acknowledgements

The authors would like to thank Ms. Sumiko Ohnuma for her support in preparing samples. This work was supported, in part, by research funds from the Yamagata Prefectural Government and Tsuruoka City, Japan, and by a runner-up award fund from Kuraray/Leave a Nest to Chandran S. Abhinand in 2017. The authors also thank Karnataka Biotechnology and Information Technology Services (KBITS) and the Government of Karnataka for their support of the Center for Systems Biology and Molecular Medicine at Yenepoya (Deemed to be University) under the Biotechnology Skill Enhancement Program in Multiomics Technology (BiSEP GO ITD 02 MDA 2017).

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Correspondence to Chandran S. Abhinand or Josephine Galipon.

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This article does not contain any studies with human participants or animals performed by any authors. The authors have no financial or proprietary interests in any of the material discussed in this article.

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Abhinand, C.S., Galipon, J., Mori, M. et al. Temporal phosphoproteomic analysis of VEGF-A signaling in HUVECs: an insight into early signaling events associated with angiogenesis. J. Cell Commun. Signal. 17, 1067–1079 (2023). https://doi.org/10.1007/s12079-023-00736-z

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  • DOI: https://doi.org/10.1007/s12079-023-00736-z

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