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- W1983226793 abstract "To examine the myelopoietic activity of immunoadjuvants like Bacillus Calmette Guerin (BCG), methanol extraction residue of BCG (MER), Corynebacterium parvum and Pyran, we performed experiments to delineate their action on human marrow cells. Whole light-density (<1.077 g/ml) cells (LD) (2 × 106/ml and 2 ml/dish), adherent (Ad) cells, and nonadherent (N-Ad) cells alone (derived from 4 × 106 LD cells/dish) from human marrow were incubated with and without the above agents. The conditioned media (CM) were harvested at 24, 72, 96 and 168 h and colony-stimulating activity (CSA) assayed against light-density nonadherent human marrow cells (0.5 × 105or 1.0 × 105 per dish). Maximum CSA elaboration was shown to occur after 72 or 96 of incubation, and an invariable drop in the activity was noted after an incubation of 168 h. The optimal concentrations elaborating maximum CSA for BCG, MER and C. parvum were 1000, 100 and 10 μg/ml, respectively. The CM prepared with higher concentrations were less active. Pyran-produced CM were found to be inactive for CSA. The CSA elaborated from LD cells was always more than additive to that from Ad and N-Ad cells when incubated separately. However, when Ad and N-Ad cells were incubated together (ratio 1:3), the CSA in CM was as potent as from LD cells. Immunoadjuvants themselves had no colony-stimulating effect on N-Ad target cells in the presence of CSA source. On the other hand, they inhibited colony growth at higher concentrations. This inhibition seems to be due partly to the products of the cycloxigenase pathway of arachidonic acid metabolism." @default.
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- W1983226793 date "1980-01-01" @default.
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- W1983226793 title "The kinetics of colony-stimulating activity elaboration from human bone marrow cells by immunoadjuvants: Interactions between light density adherent and nonadherent cells in vitro" @default.
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- W1983226793 doi "https://doi.org/10.1016/0145-2126(80)90092-2" @default.
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