{"title":"Entrapment of L-asparaginase in red blood cells. A strategy to improve treatment of acute lymphoblastic leukemia.","authors":"S. Updike","doi":"10.1159/000410229","DOIUrl":null,"url":null,"abstract":"Autologous red blood cells were loaded with L-asparaginase and injected intravenously into monkeys. A single dose of 1850 IU/Kg suppressed plasma asparagine for 19 days compared to 10 days for the same dose injected free in solution. Rabbit antisera to asparaginase was used to passively immunize guinea-pigs. These animals were then challenged with RBC-entrapped asparaginase versus asparaginase free in solution. RBC entrapment allowed a ten fold greater dose of asparaginase before anaphylaxis became a problem. RBC entrapment prolongs the duration of action of asparaginase and offers protection against anaphylaxis. Clinical trial in patients with acute lymphoblastic leukemia is recommended.","PeriodicalId":75590,"journal":{"name":"Bibliotheca haematologica","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1985-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1159/000410229","citationCount":"8","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bibliotheca haematologica","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1159/000410229","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 8
Abstract
Autologous red blood cells were loaded with L-asparaginase and injected intravenously into monkeys. A single dose of 1850 IU/Kg suppressed plasma asparagine for 19 days compared to 10 days for the same dose injected free in solution. Rabbit antisera to asparaginase was used to passively immunize guinea-pigs. These animals were then challenged with RBC-entrapped asparaginase versus asparaginase free in solution. RBC entrapment allowed a ten fold greater dose of asparaginase before anaphylaxis became a problem. RBC entrapment prolongs the duration of action of asparaginase and offers protection against anaphylaxis. Clinical trial in patients with acute lymphoblastic leukemia is recommended.
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