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Labelling index of human and mouse tumors assessed by bromodeoxyuridine staining in vitro and in vivo and flow cytometry

Journal Article · · Cytometry (Baltimore); (United States)
OSTI ID:5634245
Bromodeoxyuridine (BrdUrd) incorporation and flow cytometry were used to measure human tumor kinetic parameters in vitro and in vivo. The technique was validated by comparison of labelling index estimates of mouse tumors in vivo and in vitro using BrdUrd and flow cytometry with tritiated thymidine (/sup 3/HdThd) autoradiography. Similar labelling indices were obtained with both in vivo and in vitro incorporation into DNA of the two different precursors. Measurements of human tumor labelling indices were similar following in vitro incubation with either BrdUrd or /sup 3/HdThd. The use of BrdUrd allowed the visualization of a population of S-phase cells that did not appear to incorporate BrdUrd or /sup 3/HdThd. The human tumor labelling indices obtained with BrdUrd incorporation were similar to previously reported values using autoradiography studies. Preliminary studies demonstrated that significant human tumor labelling could be achieved with an intravenous injection of 500 mg BrdUrd.
OSTI ID:
5634245
Journal Information:
Cytometry (Baltimore); (United States), Journal Name: Cytometry (Baltimore); (United States) Vol. 6; ISSN CYTOD
Country of Publication:
United States
Language:
English