A study of the relationship between expression level of TRF1 protein and telomerase activity in human acute leukemia.
J Zhejiang Univ Sci B
; 7(2): 154-8, 2006 Feb.
Article
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| MEDLINE
| ID: mdl-16421973
ABSTRACT
OBJECTIVE:
To study the expression level of TRF1 (telomeric repeat binding factor 1) protein in human acute leukemia and relationship between expression level of TRF1 protein and telomerase.METHODS:
A quantitative Western-Blot technique was developed using anti-TRF1(33-277) monoclonal antibody and GST-TRF1 purity protein as a standard to further determine the expression level of TRF1 protein in total proteins extracted from clinical specimens.RESULTS:
Bone marrow tissues of 20 acute leukemia patients were studied, 11 healthy donors' bone marrows were taken as a control. The expression level of TRF1 protein was significantly higher (P<0.01) in normal bone marrow ((2.217+/-0.462) microg/microl) than that of acute leukemia patients ((0.754+/-0.343) microg/microl). But there was no remarkable difference between ALL and ANLL patients ((0.618+/-0.285) microg/microl vs (0.845+/-0.359) microg/microl, P>0.05). After chemotherapy, TRF1 expression level of patients with complete remission elevated ((0.772+/-0.307) microg/microl vs (1.683+/-0.344) microg/microl, P<0.01), but lower than that of normal ((2.217+/-0.462) microg/microl, P<0.01). There was no significantly difference after chemotherapy ((0.726+/-0.411) microg/microl vs (0.895+/-0.339) microg/microl, P>0.05). TRF1 expression level of patients with complete remission is higher than that of patients without complete remission ((1.683+/-0.344) microg/microl vs (0.895+/-0.339) microg/microl, P<0.01). All samples were determined for telomerase activity. It was confirmed that the activity of telomerase in normal bone marrow was lower than that of acute leukemia patients ((0.125+/-0.078) microg/microl vs (0.765+/-0.284) microg/microl, P<0.01). There was no significant difference of expression level of TRF1 protein between ALL and ANLL patients ((0.897+/-0.290) microg/microl vs (0.677+/-0.268) microg/microl, P>0.05). After chemotherapy, telomerase activity of patients with complete remission decreased ((0.393+/-0.125) microg/microl), but was still higher than that of normal ((0.125+/-0.078) microg/microl, P<0.01).CONCLUSION:
The expression level of TRF1 protein has correlativity to the activity of telomerase (P<0.001).
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Leucemia Mieloide Aguda
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Telomerasa
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Proteína 1 de Unión a Repeticiones Teloméricas
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Leucemia-Linfoma Linfoblástico de Células Precursoras
Límite:
Adolescent
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Adult
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Aged
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Child
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
J Zhejiang Univ Sci B
Asunto de la revista:
BIOLOGIA
/
MEDICINA
Año:
2006
Tipo del documento:
Article
País de afiliación:
China