Hemolysis of stored erythrocytes is a big obstacle for the development of new
plasticizer-free
polymer containers.
Hemolysis is mainly caused by cell membrane oxidation and
cation leaks from the intracellular fluid during storage. To construct an anti-hemolytic surface for a
plasticizer-free
polymer, we fabricated 2-O-α-d-glucopyranosyl-l-ascorbic
acid (AA-2G)-loaded
polycaprolactone (PCL)-
crown ether micro/nanofibers on the surface of
styrene-b-(
ethylene-co-
butylene)-b-
styrene (SEBS). Our strategy is based on the sensitive response of the
crown ether to leaked
potassium, causing the release of
AA-2G, the
AA-2G can then remove the excess ROS, maintaining the Na/K-pump activity and the cell integrity. We demonstrated that the PCL-
crown ether micro/nanofibers have been well prepared on the surface of SEBS; the micro/nanofibers provide a sensitive response to excess K+ and trigger the rapid release of
AA-2G.
AA-2G then acts as an
antioxidant to reduce the excess ROS and maintain the Na/K-pump activity to mitigate
cation leaks, resulting in the reduced
hemolysis of the preserved erythrocytes. Our work thus provides a novel method for the development of
plasticizer-free
polymers for the storage of erythrocytes, and has the potential to be used to fabricate long-term anti-hemolytic
biomaterials for in vivo use.