Summary
Cysteine auxotrophy and absence of cystathionase (CSE) has been associated with certain human and rodent leukemic cell lines. To determine whether this state was a marker of malignant transformation or of cellular differentiation, CSE content was measured in 16 well characterized human leukemia-lymphoma cell lines. Enzyme was easily detected in several lines but its level did not correlate with a proposed scheme of differentiation based on cell-surface markers. However, the apparent absence of enzyme in human bone marrow CFU-C determined by growth experiments suggests reduced levels of CSE may be a marker of cytoplasmic immaturity.
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Supported by a grant from the National Institutes of Health (CA29331-01 1 RO1). Dr. Glode is a Junior Faculty Clinical Fellow of the American Cancer Society
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Link, D., Drebing, C. & Glode, L.M. Cystathionase: A potential cytoplasmic marker of hematopoietic differentiation. Blut 47, 31–39 (1983). https://doi.org/10.1007/BF00321048
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DOI: https://doi.org/10.1007/BF00321048