RESUMO
Objective To observe the relationship between spinal cord cystic degeneration, spinal cord movement improvement and ap-parent diffusion coefficient (ADC) values after early cervical spinal cord injury. Methods 18 patients with early cervical spinal cord injury were examined with MRI T1WI, T2WI and diffusion weighted imaging (DWI). Then ADC values and ADC maps were obtained. Their ASIA motor scores were also recorded. The relationship between spinal cord cystic degeneration and spinal cord movement improvement and ADC values was analyzed. Results ADC values were lower in those with cystic degeneration than without cystic degeneration in early cervi-cal spinal cord injury, and the cut-off point was 700×10-6 mm2/s. ADC values were positively correlated with age. The movement improve-ment did not obviously correlate with ADC values. Conclusion ADC values of early cervical spinal cord injury are less than 700×10-6 mm2/s when cystic degeneration happened. Motor function recovery of patients with early cervical spinal cord injury cannot be estimated by mea-suring ADC values.
RESUMO
The study was aimed to investigate the mechanism of cytotoxic effect of trichosanthin (TCS) on leukemia or lymphoma cell lines. Trypan blue exclusion was used to measure the effect of TCS on cell growth and flow cytometry was used to detect the effects of TCS on cell apoptosis and cell cycle. The results indicated that the TCS could inhibit proliferation of various leukemia/lymphoma cell lines at 12.5 microg/ml concentration, but the effect of TCS on T-lymphocyte and macrophage cell lines showed inducing cell apoptosis and the effect of TCS on B lymphocyte cell line showed inhibiting cell growth. Detection of the cell cycle revealed that TCS could arrest B lymphocytes at S phase, but not had this effect on T lymphocytes at the same condition. It is concluded that TCS can kill leukemia/lymphoma cells through different mechanisms such as inducing cell apoptosis or arresting cell cycle according to cell types.