[Effect of centipede extract on cervical tumor of mice and its mechanism]

To study the anti-tumor activity of centipede extract on cervical tumor of mice and its mechanism.

The tumor-bearing mice were treated with centipede extract from two solvents [ether (CE) and alcohol (CA)] at different comcentration. The mice' life span, tumor inhibition rate and immune function were estimated.

No mice died in CE and CA treatment groups and the tumor inhibition rate was 52.85% and 33.65% respectively. Observed the tumor tissue slices with light microscope and found infiltration of tumor cells in striated muscle in the control group but centipede treatment groups had massive necrosis and apoptosis. Karyopyknosis and apoptotic tumor cells were observed in the treatment groups under transmission electron microscopy. Compared with control group, the expression of Bax increased, the expressions of Bcl-2 and Survivin decreased, but the content of VEGF, the indexes of thymus and spleen had no significant change in treatment groups. The number of CD3+ T lymphocytes had no significant change while the ratio of CD4+ and CD8+, the number of CD19+ B lymphocytes decreaed in the CE group. The numbers of CD3+ and CD4+ lymphocytes decreased in the CA group. The pathological examine indicated no obvious change in the tissue slices of mice's liver and kidney, manifested the concentrations of CE and CA between the article's had no visible side effect. CONNCLUSION: The two extracts (CE and CA) can suppress the growth of cervical tumor and its mechanism may be related to Bax and Caspase-3 medicated the mitochondrial signal transit pathway.