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• W4313250533 abstract "Abstract Background Sprouting angiogenesis is an important mechanism for morphogenetic phenomena, including organ development, wound healing, and tissue regeneration. In regenerative medicine, therapeutic angiogenesis is a clinical solution for recovery from ischemic diseases. Mesenchymal stem cells (MSCs) have been clinically used given their pro-angiogenic effects. MSCs are reported to promote angiogenesis by differentiating into pericytes or other vascular cells or through cell–cell communication using multiple protein–protein interactions. However, how MSCs physically contact and move around ECs to keep the sprouting angiogenesis active remains unknown. Methods We proposed a novel framework of EC–MSC crosstalk analysis using human umbilical vein endothelial cells (HUVECs) and MSCs obtained from mice subcutaneous adipose tissue on a 3D in vitro model, microvessel-on-a-chip, which allows cell-to-tissue level study. The microvessels were fabricated and cultured for 10 days in a collagen matrix where MSCs were embedded. Results Immunofluorescence imaging using a confocal laser microscope showed that MSCs smoothed the surface of the microvessel and elongated the angiogenic sprouts by binding to the microvessel’s specific microstructures. Additionally, three-dimensional modeling of HUVEC–MSC intersections revealed that MSCs were selectively located around protrusions or roots of angiogenic sprouts, whose surface curvature was excessively low or high, respectively. Conclusions The combination of our microvessel-on-a-chip system for 3D co-culture and image-based crosstalk analysis demonstrated that MSCs are selectively localized to concave–convex surfaces on scaffold structures and that they are responsible for the activation and stabilization of capillary vessels." @default.
• W4313250533 created "2023-01-06" @default.
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• W4313250533 date "2022-12-27" @default.
• W4313250533 modified "2023-09-30" @default.
• W4313250533 title "Image-based crosstalk analysis of cell–cell interactions during sprouting angiogenesis using blood-vessel-on-a-chip" @default.
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• W4313250533 doi "https://doi.org/10.1186/s13287-022-03223-1" @default.
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