Colony growth characteristics in chronic myelomonocytic leukemia.
Using cell culture studies specific in-vitro characteristics have been reported for Philadelphia chromosome positive myelogenous leukemia (Ph+ CML) and for juvenile chronic myelogenous leukemia (JCML) previously. We performed cell culture studies in four patients with chronic myelomonocytic leukemia (CMML) and demonstrated the following in-vitro features: excessively increased circulating CFU-C, while BFU-E and CFU-mix were either moderately increased or not detectable; CFU-C colony formation from CMML mononuclear cells (MNC) without addition of exogenous colony stimulating activity (CSA), even after depletion from adherent cells; failing inhibition of CMML MNC on normal BFU-E colony formation. These in-vitro characteristics point to CMML as a distinct entity. In two CMML-patients investigated CFU-C proliferation appeared to some extent inhibited by the addition of IFN-alpha, IFN-gamma and TNF-alpha to cell cultures.
Geissler
K
K
1st Dept. of Medicine, University of Vienna, Austria.
Hinterberger
W
W
Bettelheim
P
P
Haas
O
O
Lechner
K
K
D000368:Aged; D000369:Aged, 80 and over; D002455:Cell Division; D003114:Colony-Forming Units Assay; D005260:Female; D006801:Humans; D007951:Leukemia, Myeloid / Q000235:genetics / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D010677:Philadelphia Chromosome