ABSTRACT
Objective To investigate the role and significance of neuropilin-2(NRP2)for regulating the angiogenesis of pancreatic neuroendocrine tumors(PNETs).Methods The NRP2 expression in pancreatic neuroendocrine tumer BON-1 cell line was intevened.The BON-1 cells cultural supernatants in the control group and interference group were used to treat human umbilical vein endothelial cells(HUVEC).CCK-8 was used to detect the cell proliferation,Transwell was used to detected the cell migration and the tubule formation test was used detect the pro-angiogenesis.Results The CCK-8 detection showed that there was no statistically significant difference in the supernatant treated HUVEC proliferations between the interference group and control group medium(P>0.05):the absorbancy in the control group was 0.35±0.04,while which in the interference group was 0.32±0.04.The Transwell test showed that the invasion ability of HUVEC treated with cultural supernatants in the interference group was weakened compared with the control group,the control group was(203±13)/hole,while the interference group was(100±10)/hole(P＜0.01);the tubule formation test showed that HUVEC tubular formation treated by cultural supernatant in the interference group was decreased,the control group was 40±5,while the interference group was 24±3(P＜0.01).Conclusion Interfering NRP2 expression of BON-1 cells can inhibit the vessel formation ability of co-cultured HUVEC,suggesting that NRP2 may have the pro-angiogenesis effect of PNETs,and may be a potential new target for the treatment of PNETs.
ABSTRACT
Objective To explore the effects of colon carcinoma cells on stimulating canalization of human lymphatic endothelial cells(hLECs)in vitro.Methods hLECs in experiment group were cultured with the supernatant of colon carcinoma cell SW480,and they were cultured in endothelial culture medium in control group.The difference of the 2 groups in the ability of canalization was observed,the changes in cytoskeleton and the expression of Prox1 were detected by immunofluorescence assay,and the expression of integrin ?9 was determined by Western blotting.Results In comparison to the control group,hLECs in experiment group showed stronger ability of canalization,as a copious net-structure appeared on day 7 of cultivation,and the typical tube-structure formed finally on day 14.The number of tube-structure,including lymphatic branches,were greater in hLECs of experiment group(2.93?0.56)than control group(1.56?0.26)from day 6 on(P