Effect of vascular endothelial growth factor on apoptosis and expression of Bcl-2 and Mcl-1 in acute leukemia cells / 中国当代儿科杂志
Chinese Journal of Contemporary Pediatrics
;
(12): 491-495, 2006.
Article
in Chinese
| WPRIM
| ID: wpr-357778
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the effect of vascular endothelial growth factor (VEGF) on the apoptosis of human acute leukemia HL-60 cell line and to analyze the role of the related apoptosis genes, such as Bcl-2 and Mcl-1, in the process of apoptosis of human acute leukemia cells.</p><p><b>METHODS</b>HL-60 cells were treated with different concentrations of VEGF (2 microg/L, 20 microg/L or 100 microg/L ) or 20 mg/L of etoposide (VP16, an apoptosis inducter) alone or VEGF plus VP16. After 18 hrs of treatment, the apoptosis rate of HL-60 cells was detected by single-cell gel electrophoresis and flow cytometry. The expressions of Bcl-2 and Mcl-1 of HL-60 cells were detected by RT-PCR. The Control group did not receive any treatment. Immunocytochemistry was used to detect the VEGF and Mcl-1 protein in bone marrow cells from 8 patients with newly diagnosed or relapsed leukemia, 14 leukemia patients in complete remission, and from 5 normal children.</p><p><b>RESULTS</b>Different concentrations of VEGF markedly inhibited the apoptosis of HL-60 cells and decreased the apoptosis induced by VP16 exposure. The Bcl-2 and Mcl-1 mRNA and protein in HL-60 cells treated with VEGF were significantly higher than those in the Control group. The expressions of VEGF and Mcl-1 protein in bone marrow cells of the newly diagnosed and relapsed patients were significantly higher than in patients in complete remission.</p><p><b>CONCLUSION</b>VEGF can inhibit the apoptosis of HL-60 cells possibly through increasing the expressions of Bcl-2 and Mcl-1 mRNA and protein, which may represent one of the mechanisms responsible for human acute leukemia. The expressions of VEGF, Bcl-2 and Mcl-1 might be used as the markers for the prognostic evaluation of leukemia.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pathology
/
Pharmacology
/
RNA, Messenger
/
Immunohistochemistry
/
Leukemia
/
Apoptosis
/
HL-60 Cells
/
Proto-Oncogene Proteins c-bcl-2
/
Reverse Transcriptase Polymerase Chain Reaction
/
Vascular Endothelial Growth Factor A
Type of study:
Prognostic study
Limits:
Humans
Language:
Chinese
Journal:
Chinese Journal of Contemporary Pediatrics
Year:
2006
Type:
Article
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