In vitro effects of human recombinant alpha-2b interferon on Ph1+ chronic myelogenous leukemia cells maintained in long term marrow cultures: a functional and morphological analysis.
J Biol Regul Homeost Agents
; 3(3): 102-7, 1989.
Article
en En
| MEDLINE
| ID: mdl-2624145
In this study in vitro results obtained with hu rec IFN-alpha 2b on Ph1+ stem cells from patients with chronic myelogenous leukemia in chronic phase (CML in CP) will be discussed: cells were incubated with different IFN concentrations (100, 1000, 10000 IU/ml) for different times (24, 96 hrs, 8, 15, days) and maintained in long term marrow cultures (LTMC); CFU-GM assay, cytochemistry and cytogenetic analyses were performed weekly. A high sensitivity of CML cells to the in vitro treatment with IFN was observed. Cell count in LTMC showed a progressive reduction inversely proportional to time of incubation and concentration of IFN; a marked decrease in colony growth was observed at the end of incubations and during the course of LTMC. Low concentrations of IFN permitted a morphological maturation and the expression of alkaline phosphatase. Cytogenetic analyses showed a marked reduction of mytoses in cultures treated with high concentrations of IFN as result of a combined cytostatic and cytolitic effect; the persistance of 100% Ph1+ cells in LTMC and in CFU-GM colonies might be related, as opposed to in vivo results, to different IFN exposure conditions or might be influenced by other factors.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Leucemia Mielógena Crónica BCR-ABL Positiva
/
Interferón Tipo I
/
Interferón-alfa
Límite:
Humans
Idioma:
En
Revista:
J Biol Regul Homeost Agents
Asunto de la revista:
BIOLOGIA
/
BIOQUIMICA
Año:
1989
Tipo del documento:
Article
País de afiliación:
Italia
Pais de publicación:
Italia