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Biologically active constituents of the secretome of human W8B2(+) cardiac stem cells

Nie, S; Wang, X; Sivakumaran, P; Chong, MMW; Liu, X; Karnezis, T; Bandara, N; ... Lim, SY; + view all (2018) Biologically active constituents of the secretome of human W8B2(+) cardiac stem cells. SWcientific Reports , 8 , Article 1579. 10.1038/s41598-018-19855-4. Green open access

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The benefits of adult stem cells for repair of the heart have been attributed to the repertoire of salutary paracrine activities they appear to exert. We previously isolated human W8B2+ cardiac stem cells (CSCs) and found they powerfully influence cardiomyocytes and endothelial cells to collectively promote cardiac repair and regeneration. Here, the complexity of the W8B2+ CSC secretomes was characterised and examined in more detail. Using ion exchange chromatography to separate soluble proteins based on their net surface charge, the secreted factors responsible for the pro-survival activity of W8B2+ CSCs were found within the low and medium cation fractions. In addition to the soluble proteins, extracellular vesicles generated from W8B2+ CSCs not only exhibited pro-survival and pro-angiogenic activities, but also promoted proliferation of neonatal cardiomyocytes. These extracellular vesicles contain a cargo of proteins, mRNA and primary microRNA precursors that are enriched in exosomes and are capable of modulating collectively many of the cellular pathways involved in protein metabolism, cell growth, as well as cellular responses to stress and organisation of the extracellular matrix. Thus the W8B2+ CSC secretome contains a multitude of bioactive paracrine factors we have now characterised, that might well be harnessed for therapeutic application for cardiac repair and regeneration.

Type: Article
Title: Biologically active constituents of the secretome of human W8B2(+) cardiac stem cells
Open access status: An open access version is available from UCL Discovery
DOI: 10.1038/s41598-018-19855-4
Publisher version: http://doi.org/10.1038/s41598-018-19855-4
Language: English
Additional information: Copyright © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Te images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
URI: http://discovery.ucl.ac.uk/id/eprint/10043156
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