Example sentences for: oxazaphosphorines

How can you use “oxazaphosphorines” in a sentence? Here are some example sentences to help you improve your vocabulary:

  • Treatment of L1210/CPA cells in vitro with 50 μM DEAB abolished the tumor cells' resistance to 4-HC [ 19 ] . DEAB also exhibited in vivo efficacy as a ALDH1A1 inhibitor, as demonstrated by the toxicity to the intestinal crypt cells in mice receiving co-injections of DEAB and cyclophosphamide [ 21 ] . More recently, DEAB has been used to demonstrate that overexpression of human ALDH1A1 in transfected cell lines is sufficient to cause cellular resistance to the oxazaphosphorines [ 22 ] and 4-HC [ 23 ] . DEAB has also been an effective reagent in fluorescent-activated cell sorting (FACS) techniques to isolate human hematopoietic stem cells based on the expression of ALDH1A1 activity [ 5 6 ] . In contrast to DEAB and DPAB, daidzin - a natural product isolated from Pueraria lobata (the Kudzu plant) - shows specificity for inhibiting ALDH2 at concentrations similar to that of DPAB used to inhibit ALDH1A1 [ 24 25 ] . An inhibitor specific for ALDH1A2 has not yet been reported.

  • In one report, ALDH1A1 protein was not detected by Western blot, but enzyme activity was detected using flow cytometry and a fluorescent aldehyde substrate [ 5 ] . In a second study, ALDH1A1 protein was detected using an ELISA assay and activity was detected using aldophosphamide as substrate [ 31 ] . In these two studies, designed to look at the relationship of ALDH1A1 activity to antitumor drug resistance, the levels of ALDH1A1 were low in HL-60 compared to other cell types, corresponding to the sensitivity of HL-60 cells to oxazaphosphorines.

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