Panaxatriol ginsenoside (PTGS) is the major element of ginsenoside. It was shown that ginsenoside could regulate the functions of several immune cells, possibly mediated by enhanced secretion of interleukine-2 (IL-2) ...Panaxatriol ginsenoside (PTGS) is the major element of ginsenoside. It was shown that ginsenoside could regulate the functions of several immune cells, possibly mediated by enhanced secretion of interleukine-2 (IL-2) and interferon (IFN) . Recently, it was shown that the promotion of cytokines (IL-1, 2, 3, 4, 5, 6, IFN)with PTGS was related展开更多
Human Pro-Urokinase (Pro-UK) is expressed in CHO-DHFR- cells at high efficiency by co-transfecting the mouse dhfr gene and Pro-UK cDNA under the control of the SV40 late promoter. After gene co-amplification, the prod...Human Pro-Urokinase (Pro-UK) is expressed in CHO-DHFR- cells at high efficiency by co-transfecting the mouse dhfr gene and Pro-UK cDNA under the control of the SV40 late promoter. After gene co-amplification, the product level could reach 2-3 μg/106 cells/24 h in the presence of 5×10-6 mol/ L MTX, and the levels can be further raised to 3. 5-4 μg/106 cells/24 h by PMA superinduction. The copy number of Pro-UK cDNA in the genomes of host cells is about 200-300 copies/cell. The Western blot analysis shows that the recombinant Pro-UK has similar molecular weight to its natural counterpart, and also the amidolytic activity of the product is determined by S-2444 assay.展开更多
文摘Panaxatriol ginsenoside (PTGS) is the major element of ginsenoside. It was shown that ginsenoside could regulate the functions of several immune cells, possibly mediated by enhanced secretion of interleukine-2 (IL-2) and interferon (IFN) . Recently, it was shown that the promotion of cytokines (IL-1, 2, 3, 4, 5, 6, IFN)with PTGS was related
基金Project supported by the National High-Technology Program "863".
文摘Human Pro-Urokinase (Pro-UK) is expressed in CHO-DHFR- cells at high efficiency by co-transfecting the mouse dhfr gene and Pro-UK cDNA under the control of the SV40 late promoter. After gene co-amplification, the product level could reach 2-3 μg/106 cells/24 h in the presence of 5×10-6 mol/ L MTX, and the levels can be further raised to 3. 5-4 μg/106 cells/24 h by PMA superinduction. The copy number of Pro-UK cDNA in the genomes of host cells is about 200-300 copies/cell. The Western blot analysis shows that the recombinant Pro-UK has similar molecular weight to its natural counterpart, and also the amidolytic activity of the product is determined by S-2444 assay.
