Suppression of protein inactivation during freezing by minimizing pH changes using ionic cryoprotectants

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F16%3A00088279" target="_blank" >RIV/00216224:14310/16:00088279 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.ijpharm.2016.05.031" target="_blank" >http://dx.doi.org/10.1016/j.ijpharm.2016.05.031</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ijpharm.2016.05.031" target="_blank" >10.1016/j.ijpharm.2016.05.031</a>

Result language
angličtina
Original language name
Suppression of protein inactivation during freezing by minimizing pH changes using ionic cryoprotectants
Original language description
Freezing and lyophilization are often used for stabilization of biomolecules; however, this sometimes results in partial degradation and loss of biological function in these molecules. In this study we examined the effect of freezing-induced acidity changes on denaturation of the model enzyme haloalkane dehalogenase under various experimental conditions. The effective local pH of frozen solutions is shown to be the key causal factor in protein stability. To preserve the activity of frozenthawed enzymes, acidity changes were prevented by the addition of an ionic cryoprotectant, a compound which counteracts pH changes during freezing due to selective incorporation of its ions into the ice. This approach resulted in complete recovery of enzyme activity after multiple freeze-thaw cycles. We propose the utilization of ionic cryoprotectants as a new and effective cryopreservation method in research laboratories as well as in industrial processes.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
FR - Pharmacology and apothecary chemistry
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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