Effects of bone marrow stromal cells and VLA-4 antibody on apoptosis of childhood leukemia cells / 中国当代儿科杂志
Chinese Journal of Contemporary Pediatrics
; (12): 897-901, 2010.
Article
在 Zh
| WPRIM
| ID: wpr-286955
Responsible library:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To study the protective effect of bone marrow stromal cells (BMSCs) upon childhood leukemia cells and the influence of VLA-4 antibody in vitro on leukemia cell apoptosis.</p><p><b>METHODS</b>BMSCs from children with acute leukemia-were isolated by human lymphocyte separation medium. BMSCs (adherent) and leukemia cells (suspended) were cultured in vitro. This study included four groups leukemia cells alone (control), leukemia cells+BMSCs, leukemia cells+BMSCs supernatant and leukemia cells+BMSCs+VLA-4 antibody. The apoptosis rate of leukemia cells in the four groups was determined by Annexin Ⅴ-FITC double-labeled flow cytometry. The expression of survivin and bcl-2 genes in leukemia cells was ascertained by RT-PCR.</p><p><b>RESULTS</b>The apoptosis rate of leukemia cells in the leukemia cells+BMSCs and the leukemia cells+BMSCs supernatant groups was lower than that in the control group (P<0.05). Compared with the leukemia cells+BMSCs and the leukemia cells+BMSCs supernatant groups, the apoptosis rate of leukemia cells in the VLA-4 antibody group increased significantly (P<0.05). In the VLA-4 antibody group, the apoptosis rate of leukemia cells increased with prolonged culture time. There were significant differences in the apoptosis rate between 12 hrs and 24 hrs after VLA-4 antibody treatment (P<0.01). The expression of survivin and bcl-2 genes in leukemia cells from the VLA-4 antibody groups was reduced compared with that from the leukemia cells+BMSCs and the leukemia cells+BMSCs supernatant groups (P<0.05).</p><p><b>CONCLUSIONS</b>BMSCs play protective roles on leukemia cells. VLA-4 antibody can block the adhesion between BMSCs and leukemia cells and promote leukemia cell apoptosis.</p>
全文:
1
索引:
WPRIM
主要主题:
Pathology
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Physiology
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Therapeutics
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Bone Marrow Cells
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Leukemia
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Stromal Cells
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Apoptosis
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Genes, bcl-2
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Integrin alpha4beta1
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Therapeutic Uses
限制:
Adolescent
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Child
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Child, preschool
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Female
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Humans
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Infant
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Male
语言:
Zh
期刊:
Chinese Journal of Contemporary Pediatrics
年:
2010
类型:
Article