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Open AccessFeature PaperArticle

Single-Cell Receptor Quantification of an In Vitro Coculture Angiogenesis Model Reveals VEGFR, NRP1, Tie2, and PDGFR Regulation and Endothelial Heterogeneity

by 1 and 1,2,*
1
Department of Biomedical Engineering, Washington University, St. Louis, MO 63130, USA
2
Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana Champaign, Urbana, IL 61801, USA
*
Author to whom correspondence should be addressed.
Processes 2019, 7(6), 356; https://doi.org/10.3390/pr7060356
Received: 5 March 2019 / Revised: 29 May 2019 / Accepted: 5 June 2019 / Published: 10 June 2019
(This article belongs to the Special Issue Systems Biomedicine )
Angiogenesis, the formation of new blood vessels from pre-existing ones, is essential for both normal development and numerous pathologies. Systems biology has offered a unique approach to study angiogenesis by profiling tyrosine kinase receptors (RTKs) that regulate angiogenic processes and computationally modeling RTK signaling pathways. Historically, this systems biology approach has been applied on ex vivo angiogenesis assays, however, these assays are difficult to quantify and limited in their potential of temporal analysis. In this study, we adopted a simple two-dimensional angiogenesis assay comprised of human umbilical vein endothelial cells (HUVECs) and human dermal fibroblasts (HDFs) and examined temporal dynamics of a panel of six RTKs and cell heterogeneity up to 17 days. We observed ~2700 VEGFR1 (vascular endothelial growth factor receptor 1) per cell on 24-h-old cocultured HDF plasma membranes, which do not express VEGFR when cultured alone. We observed 4000–8100 VEGFR2 per cell on cocultured HUVEC plasma membranes throughout endothelial tube formation. We showed steady increase of platelet-derived growth factor receptors (PDGFRs) on cocultured HDF plasma membranes, and more interestingly, 1900–2900 PDGFRβ per plasma membrane were found on HUVECs within the first six hours of coculturing. These quantitative findings will offer us insights into molecular regulation during angiogenesis and help assess in vitro tube formation models and their physiological relevance. View Full-Text
Keywords: angiogenesis; coculture; endothelial tube formation; fibroblast; tyrosine kinase receptor; VEGFR; PDGFR; Tie2; NRP; qFlow cytometry angiogenesis; coculture; endothelial tube formation; fibroblast; tyrosine kinase receptor; VEGFR; PDGFR; Tie2; NRP; qFlow cytometry
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MDPI and ACS Style

Chen, S.; Imoukhuede, P.I. Single-Cell Receptor Quantification of an In Vitro Coculture Angiogenesis Model Reveals VEGFR, NRP1, Tie2, and PDGFR Regulation and Endothelial Heterogeneity. Processes 2019, 7, 356. https://doi.org/10.3390/pr7060356

AMA Style

Chen S, Imoukhuede PI. Single-Cell Receptor Quantification of an In Vitro Coculture Angiogenesis Model Reveals VEGFR, NRP1, Tie2, and PDGFR Regulation and Endothelial Heterogeneity. Processes. 2019; 7(6):356. https://doi.org/10.3390/pr7060356

Chicago/Turabian Style

Chen, Si; Imoukhuede, P. I. 2019. "Single-Cell Receptor Quantification of an In Vitro Coculture Angiogenesis Model Reveals VEGFR, NRP1, Tie2, and PDGFR Regulation and Endothelial Heterogeneity" Processes 7, no. 6: 356. https://doi.org/10.3390/pr7060356

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