Normal human very low density lipoprotein (VLDL) can be separated into two subfractions on Heparin-Sepharose 6B chromatography. one is called ApoE-poor VLDL and the other, ApoE-rich VLDL. They are different in composi...Normal human very low density lipoprotein (VLDL) can be separated into two subfractions on Heparin-Sepharose 6B chromatography. one is called ApoE-poor VLDL and the other, ApoE-rich VLDL. They are different in compositions. Mouse peritoneal macrophages (MPM)were incubated with ApoE-poor VLDL or ApoE-rich VLDL at same concentrations for 24 hours.Increases of ApoE mRNA contents in both groups were higher than that in control and the highestApoE mRNA content was seen in MPM incubated with ApoE-poor VLDL. The results suggestthat VLDL can stimulate ApoEgene expression in MPM and the ApoE-poor VLDL exhibits morepronounced effect. It was predicted that the ApoE secreted by MPM might incorporate intoVLDL, especially the ApoE-poor VLDL, and enhance the uptake of these lipoproteins by MPM orother local cells via ApoE mediated receptor pathways.展开更多
Objective: To select a target molecule associated with invasive potential in PC-3M cell. Methods: Cell subclones were isolated from PC-3M cell line with the method of limited dilution and their invasive ability charac...Objective: To select a target molecule associated with invasive potential in PC-3M cell. Methods: Cell subclones were isolated from PC-3M cell line with the method of limited dilution and their invasive ability characterized by monolayer invasion assay. The expression of u-PAR in the cell subclones at mRNA and protein levels was assayed respectively by non-competitive quantitative RT-PCR and immunohistochemical assay. Results: The expression level of u-PAR in highly invasive cell subclones was higher than that of lower invasive subclones. Conclusion: The higher expression level of u-PAR is associated with the relative strong invasive ability of PC-3M subclones. It is indicated that the u-PAR might be a promising target molecule for inhibiting invasion of highly invasive PC-3M cell subclones.展开更多
文摘Normal human very low density lipoprotein (VLDL) can be separated into two subfractions on Heparin-Sepharose 6B chromatography. one is called ApoE-poor VLDL and the other, ApoE-rich VLDL. They are different in compositions. Mouse peritoneal macrophages (MPM)were incubated with ApoE-poor VLDL or ApoE-rich VLDL at same concentrations for 24 hours.Increases of ApoE mRNA contents in both groups were higher than that in control and the highestApoE mRNA content was seen in MPM incubated with ApoE-poor VLDL. The results suggestthat VLDL can stimulate ApoEgene expression in MPM and the ApoE-poor VLDL exhibits morepronounced effect. It was predicted that the ApoE secreted by MPM might incorporate intoVLDL, especially the ApoE-poor VLDL, and enhance the uptake of these lipoproteins by MPM orother local cells via ApoE mediated receptor pathways.
文摘Objective: To select a target molecule associated with invasive potential in PC-3M cell. Methods: Cell subclones were isolated from PC-3M cell line with the method of limited dilution and their invasive ability characterized by monolayer invasion assay. The expression of u-PAR in the cell subclones at mRNA and protein levels was assayed respectively by non-competitive quantitative RT-PCR and immunohistochemical assay. Results: The expression level of u-PAR in highly invasive cell subclones was higher than that of lower invasive subclones. Conclusion: The higher expression level of u-PAR is associated with the relative strong invasive ability of PC-3M subclones. It is indicated that the u-PAR might be a promising target molecule for inhibiting invasion of highly invasive PC-3M cell subclones.
