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  • Title: Improved stability of 2,3-bisphosphoglycerate during storage of hexokinase-overloaded erythrocytes.
    Author: Magnani M, Rossi L, Bianchi M, Serafini G, Zocchi E, Laguerre M, Ropars C.
    Journal: Biotechnol Appl Biochem; 1989 Oct; 11(5):439-44. PubMed ID: 2803567.
    Abstract:
    Human red blood cells were overloaded with homogeneous human hexokinase using a procedure of encapsulation based on hypotonic hemolysis and isotonic resealing and reannealing to achieve a final activity that was 15 times higher than that in control cells. Storage for 5 weeks at 4 degrees C of hexokinase-overloaded erythrocytes shows that these cells undergo small K+ leakage and mean cell volume increase compared with control cells. Furthermore, after these 5 weeks of storage the 2,3-bisphosphoglycerate content was normal while the ATP concentration was slightly reduced. These results and other properties suggest that encapsulation of key glycolytic enzymes in erythrocytes can provide a new way to maintain in vitro functionally active red blood cells for at least 5 weeks.
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