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.
Artigo
em Chinês
| WPRIM
| ID: wpr-286955
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>
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Patologia
/
Fisiologia
/
Terapêutica
/
Células da Medula Óssea
/
Leucemia
/
Células Estromais
/
Apoptose
/
Genes bcl-2
/
Integrina alfa4beta1
/
Usos Terapêuticos
Limite:
Adolescente
/
Criança
/
Criança, pré-escolar
/
Feminino
/
Humanos
/
Lactente
/
Masculino
Idioma:
Chinês
Revista:
Chinese Journal of Contemporary Pediatrics
Ano de publicação:
2010
Tipo de documento:
Artigo
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