Objective To study the effect of electromagnetic pulse （EMP） exposure on permeability of in vitro blood-brain-barrier （BBB） model. Methods An in vitro BBB model, established by co-culturing brain microvascular end...Objective To study the effect of electromagnetic pulse （EMP） exposure on permeability of in vitro blood-brain-barrier （BBB） model. Methods An in vitro BBB model, established by co-culturing brain microvascular endothelial cells （BMVEC） and astroglial cells （AC） isolated from rat brain, was exposed to EMP at 100 kV/m and 400 kV/m, respectively. Permeability of the model was assayed by measuring the transendothelial electrical resistance （TEER） and the horseradish peroxidase （HRP） transmission at different time points. Levels of BBB tight junction-related proteins were measured at O, 1, 2, 4, 8, 12, 16, 20, 24 h after EMP exposure by Western blotting. Results The TEER level was lower in BBB model group than in control group at 12 h after EMP, exposure which returned to its normal level at 24 h. The 24 h recovery process was triphasic and biphasic respectively after EMP exposure at 100 kV/m and 400 kV/m. Following exposure to 400 kV/m EMP, the HRP permeability increased at 1-12 h and returned to its normal level at 24 h. Western blotting showed that the claudin-5 and ZO-1 protein levels were changed after EMP exposure. Conclusion EMP exposure at 100 kV/m and 400 kV/m can increase the permeability of in vitro BBB model and BBB tight junction-related proteins such as ZO-1 and claudin-5 may change EMP-induced BBB permeability.展开更多
Abstract: Objective To find an effective method for the treatment of malignant cerebral glioma by opening the bloodbrainbarrier (BBB).Methods The concentration of methotrexate (MTX) in tumor was measured in 18 pa...Abstract: Objective To find an effective method for the treatment of malignant cerebral glioma by opening the bloodbrainbarrier (BBB).Methods The concentration of methotrexate (MTX) in tumor was measured in 18 patients with cerebral glioma, and 155 patients with malignant glioma were treated by intracarotid infusion of papaverine and Bischloronitrosourea (BCNU).Results After intracarotid infusion of papaverine for reversible opening of BBB, the MTX concentration in tumor tissue was 1810±380 ng/g, higher than that in patients without papaverine infusion (997±126 ng/g). Eightynine patients with glioblastoma and 66 patients with anaplastic astrocytoma received intracarotid infusion of papaverine and BCNU (250 mg) for an [CM(23*6/8]average of 2.14 times. The mean survival time of thesepatients was 114.5 weeks, median survival time was 140 weeks, and fiveyear survival rate was 22.97%.Conclusion The combined chemotherapy with papaverine and BCNU through intraarterial infusion is simple, safe and effective in treating malignant cerebral glioma so long as the tumor is sensitive to the drugs.展开更多
We devoted this short interview piece with Dr Shou-Ching Tang at Augusta University to feature some promising results from a clinical phase II trial on a novel brain-penetrating peptide-paclitaxel-conjugate,ANG1005,in...We devoted this short interview piece with Dr Shou-Ching Tang at Augusta University to feature some promising results from a clinical phase II trial on a novel brain-penetrating peptide-paclitaxel-conjugate,ANG1005,in treating brain metastatic breast cancer.These results were presented by Dr.Tang at the recent annual meeting of the European Society for Medical Oncology(ESMO 2016 Congress).This development heralds an important step forward towards the development of effective chemotherapeutic agents,which can cross the bloodbrain-barrier and effectively treat and prevent the brain metastatic cancers.展开更多
基金supported by the National Basic Research Program of China(2011CB503704,2011CB503705)National Natural Science Foundation of China (No. 30970670, 60871068)
文摘Objective To study the effect of electromagnetic pulse （EMP） exposure on permeability of in vitro blood-brain-barrier （BBB） model. Methods An in vitro BBB model, established by co-culturing brain microvascular endothelial cells （BMVEC） and astroglial cells （AC） isolated from rat brain, was exposed to EMP at 100 kV/m and 400 kV/m, respectively. Permeability of the model was assayed by measuring the transendothelial electrical resistance （TEER） and the horseradish peroxidase （HRP） transmission at different time points. Levels of BBB tight junction-related proteins were measured at O, 1, 2, 4, 8, 12, 16, 20, 24 h after EMP exposure by Western blotting. Results The TEER level was lower in BBB model group than in control group at 12 h after EMP, exposure which returned to its normal level at 24 h. The 24 h recovery process was triphasic and biphasic respectively after EMP exposure at 100 kV/m and 400 kV/m. Following exposure to 400 kV/m EMP, the HRP permeability increased at 1-12 h and returned to its normal level at 24 h. Western blotting showed that the claudin-5 and ZO-1 protein levels were changed after EMP exposure. Conclusion EMP exposure at 100 kV/m and 400 kV/m can increase the permeability of in vitro BBB model and BBB tight junction-related proteins such as ZO-1 and claudin-5 may change EMP-induced BBB permeability.
文摘Abstract: Objective To find an effective method for the treatment of malignant cerebral glioma by opening the bloodbrainbarrier (BBB).Methods The concentration of methotrexate (MTX) in tumor was measured in 18 patients with cerebral glioma, and 155 patients with malignant glioma were treated by intracarotid infusion of papaverine and Bischloronitrosourea (BCNU).Results After intracarotid infusion of papaverine for reversible opening of BBB, the MTX concentration in tumor tissue was 1810±380 ng/g, higher than that in patients without papaverine infusion (997±126 ng/g). Eightynine patients with glioblastoma and 66 patients with anaplastic astrocytoma received intracarotid infusion of papaverine and BCNU (250 mg) for an [CM(23*6/8]average of 2.14 times. The mean survival time of thesepatients was 114.5 weeks, median survival time was 140 weeks, and fiveyear survival rate was 22.97%.Conclusion The combined chemotherapy with papaverine and BCNU through intraarterial infusion is simple, safe and effective in treating malignant cerebral glioma so long as the tumor is sensitive to the drugs.
文摘We devoted this short interview piece with Dr Shou-Ching Tang at Augusta University to feature some promising results from a clinical phase II trial on a novel brain-penetrating peptide-paclitaxel-conjugate,ANG1005,in treating brain metastatic breast cancer.These results were presented by Dr.Tang at the recent annual meeting of the European Society for Medical Oncology(ESMO 2016 Congress).This development heralds an important step forward towards the development of effective chemotherapeutic agents,which can cross the bloodbrain-barrier and effectively treat and prevent the brain metastatic cancers.
