Effect of dioxin on apoptosis of osteogenic sarcoma cells and regulation on gene expression of insulin-like growth factor binding protein 6 / 中华劳动卫生职业病杂志
Chinese Journal of Industrial Hygiene and Occupational Diseases
;
(12): 223-226, 2008.
Artigo
em Chinês
| WPRIM
| ID: wpr-304030
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the effect of the environmental carcinogenic factor-TCDD (2, 3, 7, 8-tetrachlorodibenzo-p-dioxin) on cell apoptosis and gene regulation of insulin-like growth factor binding protein 6 (IGFBP-6) in osteogenic sarcoma (SaOS-2) cells.</p><p><b>METHODS</b>The SaOS-2 cells were cultured with TCDD (1 x 10(-9), 1 x 10(-8), 1 x 10(-7) mol/L) for 24 hours. The MTT reduction assay and flow cytometry were used to measure the cell proliferation and the cell apoptosis in TCDD-treated SaOS-2 cells. The Nitrophenol phosphate salt method was used to measure activity of alkaline phosphatase (ALP) in SaOS-2 cells. The IGFBP-6 mRNA and protein in SaOS-2 cells were detected by reverse transcription polymerase chain reaction (RT-PCR) and western blotting analysis.</p><p><b>RESULTS</b>SaOS-2 cell proliferation was up-regulated with TCDD (1 x 10(-9), 1 x 10(-8), and 1 x 10(-7) mol/L) about 20%, 47% and 93% (18.4 +/- 4.5, 22.5 +/- 3.6 and 29.4 +/- 4.2), respectively. The synthesis of ALP was up-regulated about 28%, 95%, and 142% (1.12 +/- 0.28, 1.58 +/- 0.14 and 1.96 +/- 0.17), respectively (P < 0.05). The cell apoptosis was down-regulated in dose-dependent biological manner about 5%, 26% and 52%, respectively (P < 0.05). The expression of IGFBP-6 mRNA and protein was decreased in 1 x 10(-7) mol/L TCDD-treated SaOS-2 cells about 76% and 72% (P < 0.05).</p><p><b>CONCLUSION</b>TCDD at low concentration may have the negative effect on cell apoptosis and down-regulation on gene expression of IGFBP-6 in SaOS-2 cells.</p>
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Patologia
/
RNA Mensageiro
/
Osteossarcoma
/
Apoptose
/
Proteína 6 de Ligação a Fator de Crescimento Semelhante à Insulina
/
Linhagem Celular Tumoral
/
Proliferação de Células
/
Toxicidade
/
Dibenzodioxinas Policloradas
/
Genética
Limite:
Humanos
Idioma:
Chinês
Revista:
Chinese Journal of Industrial Hygiene and Occupational Diseases
Ano de publicação:
2008
Tipo de documento:
Artigo
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