Abstract：
:Peripheral blood myeloblasts from five patients with acute myeloblastic leukemia and peripheral remission leukocytes from two of these patients were radiolabeled by the lactoperoxidase-catalyzed surface radioiodination technique and incubated in a nutrient medium at 37 degrees. Radioactive materials shed from viable cells into the supernatant at 24 hr were purified by gel filtration and by DEAE-cellulose chromatography. The radiolabeled leukemic cells shed relatively few molecular species into the culture medium. The DEAE-cellulose eluate usually contained one major peak in which radioactivity and protein levels were coincident; the molecular weight of this compound was 350,000 to 400,000, and it contained carbohydrate as well as protein. Glycoprotein shed from leukemic cells was specifically reactive in a coprecipitation assay with defined antimyeloblast alloantisera obtained from leukemic patients receiving immunotherapy. No reaction was seen with antisera directed against HLA or B-cell antigens. Material shed from remission cells did not coprecipitate with antileukemic antisera. The isolation of radioactively labeled antigen derived from myeloblasts may ultimately allow the monitoring of human antigen levels in leukemic blood by radioimmunoassay.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Taub RN,Roncari DA,Baker MAsubject
Has Abstractpub_date
1978-12-01 00:00:00pages
4624-9issue
12eissn
0008-5472issn
1538-7445journal_volume
38pub_type
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