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- W54859666 abstract "Abstract A minority of blast cells in acute myeloblastic leukemia (AML) form colonies in culture in methylcellulose when stimulated by media conditioned by normal leukocytes in the presence of phytohemagglutinin (PHA-LCM). Blast colonies can be replated successfully, either as pooled cells or suspensions from single colonies. However, the plating efficiency declines with repeated passages, and more than four subcultures have not been achieved. In this study, blast populations were cultured in suspension, with fetal calf serum, alpha-minimal essential medium and PHA-LCM. In cells from 17 of 18 patients, exponential growth of clonogenic blast cells was maintained for six to seven days without reculturing. Colonies obtained from progenitors taken from liquid culture and replated in methylcellulose were replated to obtain the secondary plating efficiency (PE2). In 14 cases, this value was maintained or increased. In three instances, PE2 fell following culture in methylcellulose. When cells in suspension were recultured, exponential growth continued. In nine instances, exponential growth was maintained for from seven to 70 days. During this time, PE2 was maintained. Results from experiments using velocity sedimentation separation and analysis of single colonies were consistent with the view that the increase in clonogenic cells in suspension was a manifestation of their self-renewal capacity. The observations also support a model of blast progenitor growth that contains the postulate that these are capable not only of self-renewal but also of determination-like events leading to loss of proliferative capacity." @default.
- W54859666 created "2016-06-24" @default.
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- W54859666 date "1985-06-01" @default.
- W54859666 modified "2023-09-30" @default.
- W54859666 title "The proliferation in suspension of the progenitors of the blast cells in acute myeloblastic leukemia" @default.
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- W54859666 doi "https://doi.org/10.1182/blood.v65.6.1484.bloodjournal6561484" @default.
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