Effects of silkworm pupa protein on apoptosis and energy metabolism in human colon cancer DLD-1 cells

Objective:To investigate the effects of silkworm pupa(Bombyx mori) protein(SPP) on cell proliferation,apoptosis and energy metabolism in human colon cancer cells DLD-1.Methods:CCK-8 was used to detect cell proliferation rate after 72 h of cell culture for the control group(normal cultured DLD-1 cells) and SPP dose groups;Annexin-V/PI was applied to observe cell apoptosis;XFe24 Extracellular Flux Analyzer was used to detect cell mitochondrial respiratory function and glycolytic function.Results:Comparing with the control,SPP significantly inhibited the proliferation of DLD-1 cells with all the dosage tested(P <0.01);flow cytometry showed that SPP significantly promoted apoptosis(P<0.05).Additionally,SPP could significantly inhibited mitochondrial metabolism and glycolysis of DLD-1 cells and decreased cell energy metabolism in all groups treated with different doses.Conclusion:SPP can cause oxidative damage,promote apoptosis,and reduce mitochondrial respiratory and glycolysis rate in colon cancer DLD-1 cells,which reveals that SPP has the potential to serve as the anti-cancer drugs in the future,but further experimental evidence is needed.

基于CPFD方法的甲烷无氧芳构化流化床反应器数值模拟

基于计算颗粒流体力学(CPFD)方法对甲烷无氧芳构化催化反应/催化剂再生系统中的流化床反应器进行了数值模拟,并将模拟结果与实验结果进行比较,验证了CPFD模拟的可行性。通过模拟得到了反应器内整体气固流动状态、气相各组分浓度分布及催化剂积碳含量分布等,考察了不同操作条件如甲烷进料流量及反应器内催化剂存留量对气固两相流动及甲烷无氧芳构化反应性能的影响。结果表明,甲烷进料流量增加会降低甲烷转化率,提高芳烃选择性;反应器内催化剂存留量增加会加剧床内气固两相的返混程度,提高甲烷转化率,降低芳烃选择性。