A New Mononuclear Cell (MNC) RNase H Activity-Based Parameter (ψ) With Possible Prognostic Value in Assessing Progression in Acute Myeloid Leukaemia.
Leuk Lymphoma
; 1(3-4): 209-20, 1990.
Article
em En
| MEDLINE
| ID: mdl-27463988
ABSTRACT
A new biological parameter (ψ) has been obtained and proposed here to serve in the assessment of acute myeloid leukemia (AML) progression. It is a function of the activity of RNase H (EC 3.1.4.34), the latter determined in mononuclear cells from the peripheral blood of AML patients. Using a series of patients at the time of diagnosis and after 1-2 cycles of chemotherapy, the enzyme was assayed before the several times during chemotherapy. The derivation of 4 was based on evidence suggesting that the enzyme level correlates with the proliferating leukaemic blasts and their progenitors. Values ψ>1 signify the presence of clonogenic leukaemic progenitor cells in the peripheral circulation. When these high (> 1) ψ values were found during chemotherapy, in these cases it was possible to predict an increase of the peripheral blast pool, with 82% success, occurring 5-35 days before cytologic relapse. In the patients in whom at some stage during treatment, ψ acquired values above unity or in whom ψ increased progressively, survival time was in linear correlation with the time period from the initiation of treatment to the documentation of this high ψ estimate. These results suggest that a patient's relapse risk can be defined by ψ with some degree of precision.
Texto completo:
1
Base de dados:
MEDLINE
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Leuk Lymphoma
Assunto da revista:
HEMATOLOGIA
/
NEOPLASIAS
Ano de publicação:
1990
Tipo de documento:
Article
País de afiliação:
Grécia