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- W2123801874 abstract "BACKGROUND: Matrix metalloproteinase-9 (MMP-9 or gelatinase B) has recently been implicated in the IL-8-induced mobilization of HPCs in rhesus monkeys and mice. It is not known whether administration of G−CSF causes expression of MMP-9 during HPC mobilization. STUDY DESIGN AND METHODS: Blood samples from 15 allogeneic progenitor cell donors were collected before and during G−CSF-induced HPC mobilization. The expression of the gelatinases MMP-2 and MMP-9 in the plasma of the donors was analyzed by ELISA and zymographic analysis. Gelatinolytic activity was measured with a fluorometric assay that was specific for gelatinases. Expression of IL-6, IL-8, and soluble vascular cell adhesion molecule (VCAM) was measured by ELISA. RESULTS: Highly elevated latent gelatinolytic activity was found on Days 4 and 5 of G−CSF treatment in comparison to pretreatment activity. ELISA and zymographic analyses revealed pro-MMP-9 as the major source of the latent gelatinolytic plasma activity during mobilization. Pro-MMP-2 was not elevated compared with pretreatment levels. As IL-8 has been implicated in the expression of MMP-9, IL-8 concentrations were measured in plasma samples from donors and patients immediately before the start of HPC apheresis, but no significantly elevated IL-8 concentrations were noted. In contrast, pro-MMP-9 and latent gelatinolytic activity was highly correlated with IL-6, which was strongly elevated during mobilization therapy. Finally, soluble VCAM was equally significantly elevated on the days of apheresis. CONCLUSIONS: G−CSF mobilization treatment induces MMP-9, IL-6, and soluble VCAM. Expression of MMP-9 might be involved in the mobilization of human HPCs and might be a final common pathway of different mobilization therapies. Our data do not support a role of IL-8 in G−CSF-induced mobilization. In contrast, IL-6 might be involved in the G−CSF-induced expression of MMP-9." @default.
- W2123801874 created "2016-06-24" @default.
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- W2123801874 date "2002-05-01" @default.
- W2123801874 modified "2023-10-01" @default.
- W2123801874 title "Matrix metalloproteinase-9 (gelatinase B) is elevated during mobilization of peripheral blood progenitor cells by G-CSF" @default.
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- W2123801874 doi "https://doi.org/10.1046/j.1537-2995.2002.00088.x" @default.
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