Abstract
The authors prepared a micro-structured, thermosensitive hydrogel with N-isopropylacrylamide microgels with a lower critical solution temperature (LCST) of 32 °C dispersed on a matrix of N-isopropylacrylamide-co-dimethylacrylamide with an LCST at 40 °C. Incubation of the hydrogel at 33 °C in a solution of fluorescein-albumin induced loading of the protein. The protein was not loaded at a temperature below the LCST of the microgels (4 °C), suggesting that the shrinkage of the microgels followed by the formation of micropores within the hydrogel matrix is a prerequisite for protein loading. A sustained and complete release of the loaded protein was obtained at 37 °C.
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Acknowledgments
The authors acknowledge funding from 20th Internal Call for the Support of Research Projects from UABC, Support for the Strengthening of Academic Bodies from PRODEP, SEP's Grant Program to support New Full Time Professors PRODEP 2018 (UABC-PTC-735), and from the Third Special Internal Call for Support to Research Projects (UABC-3902). M.A.-M. acknowledges funding from CONACyT (Mexico) through Research Projects INFR-2015-251863 and PDCPN-2015-89.
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Palomino, K., Magaña, H., Meléndez-López, S.G. et al. Loading and release of a model high-molecular-weight protein from temperature-sensitive micro-structured hydrogels. MRS Communications 9, 1041–1045 (2019). https://doi.org/10.1557/mrc.2019.87
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DOI: https://doi.org/10.1557/mrc.2019.87