title: Effects of glycerol pretreatment on recovery and antioxidant enzyme activities of lyophilized red blood cells.
abstract: Successful storage of red blood cells (RBCs) by freeze-drying technique has important implications in blood transfusion and clinical medicine. We presented a method of preservation RBCs by pretreating them with glycerol solution and then freeze-drying. The effects of glycerol pretreatment on recovery and antioxidant enzyme activities of lyophilized RBCs were investigated. Rehydration of pretreated in 40 percent glycerol and freeze-dried RBCs resulted in 55.3+/-4.3 percent numerical recovery and 53.5+/-3.9 percent hemoglobin recovery, which were significantly higher than freeze-dried RBCs without glycerol pretreatment (P less than 0.01). Superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-PX) activities of 40 percent glycerol pretreated and freeze-dried RBCs almost remained fully active after freeze-drying. After 180 days storage, the activities decreased by 25.6 percent , 21.5 percent and 18.4 percent, respectively, which are significantly less than those of freeze-dried RBCs without glycerol pretreatment (P < 0.1). These data demonstrated that glycerol pretreatment had beneficial effects on the recovery and antioxidant enzyme activities of lyophilized RBCs.
authors.affiliation: Institute of Biothermal Sciences, University of Shanghai for Science and Technology, Shanghai 200093, China.
authors.forename: Xin-Li
authors.initials: XL
authors.lastname: Zhou
authors.forename: Hui
authors.initials: H
authors.lastname: He
authors.forename: Bao-Lin
authors.initials: BL
authors.lastname: Liu
authors.forename: Tse-Chao
authors.initials: TC
authors.lastname: Hua
authors.forename: Ying
authors.initials: Y
authors.lastname: Chen
mesh_terms: D000975:Antioxidants / Q000378:metabolism; D001793:Blood Preservation / Q000379:methods; D001803:Blood Transfusion / Q000379:methods; D002374:Catalase / Q000378:metabolism*; D004912:Erythrocytes / Q000187:drug effects* / Q000201:enzymology*; D005440:Fluid Therapy; D005612:Freeze Drying / Q000379:methods*; D005979:Glutathione Peroxidase / Q000378:metabolism*; D005990:Glycerol / Q000494:pharmacology*; D006801:Humans; D013482:Superoxide Dismutase / Q000378:metabolism*; D013997:Time Factors
chemical_list: D000975:Antioxidants; D002374:Catalase; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D005990:Glycerol