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Controlled release of Dextrin-conjugated growth factors to support growth and differentation of neural stem cells

Ferguson, Elaine L ORCID:, Naseer, Sameza, Powell, Lydia C ORCID:, Hardwicke, Joseph, Young, Fraser I ORCID:, Zhu, Bangfu, Liu, Qian, Song, Bing ORCID: and Thomas, David W. ORCID: 2018. Controlled release of Dextrin-conjugated growth factors to support growth and differentation of neural stem cells. Stem Cell Research 33 , pp. 69-78. 10.1016/j.scr.2018.10.008

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An essential aspect of stem cell in vitro culture and in vivo therapy is achieving sustained levels of growth factors to support stem cell survival and expansion, while maintaining their multipotency and differentiation potential. This study investigated the ability of dextrin (~74,000 g/mol; 27.8 mol% succinoylation) conjugated to epidermal growth factor (EGF) and basic fibroblast growth factor (bFGF; or FGF-2) (3.9 and 6.7% w/w protein loading, respectively) to support the expansion and differentiation of stem cells in vitro via sustained, controllable growth factor release. Supplementation of mouse neural stem cells (mNSCs) with dextrin-growth factor conjugates led to greater and prolonged proliferation compared to unbound EGF/bFGF controls, with no detectable apoptosis after 7 days of treatment. Immunocytochemical detection of neural precursor (nestin) and differentiation (Olig2, MAP2, GFAP) markers verified that controlled release of dextrin-conjugated growth factors preserves stem cell properties of mNSCs for up to 7 days. These results show the potential of dextrin-growth factor conjugates for localized delivery of bioactive therapeutic agents to support stem cell expansion and differentiation, and as an adjunct to direct neuronal repair.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Dentistry
Publisher: Elsevier
ISSN: 1873-5061
Date of First Compliant Deposit: 8 October 2018
Date of Acceptance: 3 October 2018
Last Modified: 11 Oct 2023 16:37

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