Chlorin e6声动力对人肺腺癌细胞SPCA-1生长的作用

BACKGROUND AND OBJECTIVE: Sonodynamic therapy (SDT) is a promising new approach for cancer therapy. The purpose of this study is to detect the effects of SDT on the cell proliferation of human lung adenocarcinoma cell SPCA-1, using Chlorin e6 as a sonosensitizing agent activated by ultrasound. METHODS: SPCA-1 and normal peripheral mono- nuclear cell (PMNC) were treated with ultrasound or Chlorin e6 alone and combined. Cell proliferation was determined by MTT assay, and cell morphology was studied by inverted microscope after 6 h treated. RESULTS: 1.0 MHz ultrasound (1.0 W/ cm(2)-2.0 W/cm(2)×60 s) and Chlorin e6 (0.4 mg/mL-3.2 mg/mL) inhibited the cell proliferation of both SPCA-1 and PMNC cells in a intensity- and a dose-dependent manner respectively. Compared with the ultrasound (1.0 W/cm(2)×60 s) or Chlorin e6 (0.05 mg/mL-0.2 mg/mL) alone, the inhibitory effect on the cell proliferation was remarkably increased by the combination of ultrasound and chlorin e6 in SPCA-1 cells (P < 0.05), but no same effect was observed in PMNC cells (P > 0.05). Compared with the ultrasound (1.0 W/cm(2)×60 s) or chlorin e6 (0.2 mg/mL) alone, the combination treatment of ultrasound with Chlo- rin e6 induced more necrotic cells in SPCA-1 cells (P < 0.05). CONCLUSION: There was a significant selectively inhibitory effect of sonodynamic effect with Chlorin e6 on the SPCA-1 cell growth. Chlorin e6 may be a promising sonosensitizing agent for the treatment of non-small cell lung cancer.