摘要
Objective To investigate the inhibition of low dose radiation （LDR） on S180 sarcomas and its modulation of MMP-2 and TIMP-2 in mice. Methods $180 subcutaneously implanted tumor model mice were randomly divided into two groups： control （N） and low dose radiation （LDR） groups. N mice were sacrificed after 12 h, whereas LDR mice were sacrificed after 12 （LDR-12 h）, 24 （LDR-24 h）, 48 （LDR-48 h）, and 72 （LDR-72 h） h. Thereafter, we measured the tumor volumes. Histopathology was performed, and P-V immunohistochemistry was applied to assess MMP-2 and TIMP-2 expression. Results Compared with the control group, the tumor growth was significantly inhibited in the LDR groups （P 〈 0.05）. MMP-2 expression was considerably reduced in LDR-24h （P 〈 0.05） and LDR-48h （P 〈 0.05）, whereas the change of TIMP-2 was not obvious in the LDR groups （P 〉 0.05） in contrast to that of the control group. Conclusion LDR can effectively suppress the growth of S180 implanted tumors by reducing MMP-2, which is associated with invasion and metastasis.
Objective To investigate the inhibition of low dose radiation(LDR) on S180 sarcomas and its modulation of MMP-2 and TIMP-2 in mice.Methods S180 subcutaneously implanted tumor model mice were randomly divided into two groups: control(N) and low dose radiation(LDR) groups. N mice were sacrificed after 12 h, whereas LDR mice were sacrificed after 12(LDR-12 h), 24(LDR-24 h), 48(LDR-48 h), and 72(LDR-72 h) h. Thereafter, we measured the tumor volumes. Histopathology was performed, and P-V immunohistochemistry was applied to assess MMP-2 and TIMP-2 expression.Results Compared with the control group, the tumor growth was significantly inhibited in the LDR groups(P < 0.05). MMP-2 expression was considerably reduced in LDR-24h(P < 0.05) and LDR-48h(P < 0.05), whereas the change of TIMP-2 was not obvious in the LDR groups(P > 0.05) in contrast to that of the control group.Conclusion LDR can effectively suppress the growth of S180 implanted tumors by reducing MMP-2, which is associated with invasion and metastasis.
