RESUMEN
At present,the medical profession generally acknowledged the best way to treat osteosarcoma is gene therapy,which includes tumor suppressor gene therapy,antisense gene therapy,suicide gene therapy,immune gene therapy,combined gene therapy,etc.But no matter what kind of gene therapy is that the gene must have a safe carrier.Gene therapy has made a breakthrough in osteosarcoma recently.On the basis of widespread use,we should emphasize the importance of gene vectors.
RESUMEN
Objective To observe the effect of Pingchuanning on the levels of LTB4 and sICAM-1 of guinea pigs with asthma. Methods The model guinea pigs of asthma were sensitized with ovalbumin (OVA),the changes of the delitescence of asthma was observed. The levels of LTB4 in serum and sICAM-1 in bronchoalveolar lavage fluid (BALF) were also observed by means of enzyme-linked immunosorbent (ELISA). Result Comparing with the model group,the delitescence of asthma was obviously prolonged in guinea pigs treated by Pingchuanning. The levels of LTB4 and sICAM-1 of guinea pigs with asthma treated by Pingchuanning were significantly lowered (P
RESUMEN
According to the physiological characteristics of lumbar vertebrae in Chinese, we designed and made a lumbar vertebral fusion cage of titanium and then engaged in its biomechanical test. T12-S1 of lumbar vertebrae from 18 fresh dead bodies were used. We measured the stress relaxation and the creep effects of the normal group (T12-S1 of intact lumbar vertebrae), the control group 1(simulating operation of excising intervertebral disc and planting bone on the back route) and the control group 2(simulating operation of excising intervertebral disc and inserting fusion cage). The data and stress, strain-time curves under the condition of constant stress and strain were obtained. Regression analysis yielded the reduced stress relaxation and creep functions. Finally, we analyzed and discussed the effects of the operation of excising intervertebral disc and planting bone on the back route and the operation of excising intervertebral disc and inserting fusion cage on the stability of spine.