Giovanni Santelli , Fred Valeriote , Teresa Vietti , Dean Coulter
{"title":"Cytotoxic effect of 5-fluorouracil plus cyclophosphamide against transplantable leukemias","authors":"Giovanni Santelli , Fred Valeriote , Teresa Vietti , Dean Coulter","doi":"10.1016/0014-2964(81)90265-6","DOIUrl":null,"url":null,"abstract":"<div><p>The cytotoxic effect of the combination of cyclophosphamide and <em>5</em>-fluorouracil against AKR and <em>L1210</em> leukemias was quantitated by a spleen colony assay. We used different sequences, a number of doses of each agent, and different intervals between the agents and noted different degrees of synergistic cell-kill. By proper scheduling of these agents, greater than <em>100</em>-fold increase in cell killing was noted, an effect not demonstrable for normal hematopoietic stem cells. However, the pattern of response for AKR was opposite to that for <em>L1210</em> leukemia; we suggest that this reflects a difference in the metabolism of <em>5-FU</em>.</p></div>","PeriodicalId":100497,"journal":{"name":"European Journal of Cancer (1965)","volume":"17 6","pages":"Pages 629-634"},"PeriodicalIF":0.0000,"publicationDate":"1981-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0014-2964(81)90265-6","citationCount":"7","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"European Journal of Cancer (1965)","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0014296481902656","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 7
Abstract
The cytotoxic effect of the combination of cyclophosphamide and 5-fluorouracil against AKR and L1210 leukemias was quantitated by a spleen colony assay. We used different sequences, a number of doses of each agent, and different intervals between the agents and noted different degrees of synergistic cell-kill. By proper scheduling of these agents, greater than 100-fold increase in cell killing was noted, an effect not demonstrable for normal hematopoietic stem cells. However, the pattern of response for AKR was opposite to that for L1210 leukemia; we suggest that this reflects a difference in the metabolism of 5-FU.