AI Summary & Key Takeaways
AI InsightThese results suggest that inflammatory mechanisms in microglia may also involve the neuroprotective response of these cells; this may be a promising area of study of neurodegenerative processes.
📌 3 Key Takeaways
Abstract
Aim: In this study, we investigated whether interferon gamma (IFNg), lipopolysaccharides (LPS) and amyloid beta (AMYb), as toxic stimulator agents, and erythropoietin (EPO), as a neurotrophic agent, have an effect on the production of the following neurotrophic factors in the N9 murine microglia cell line: neurotrophin 3 (NT3), neurotrophin 4 (NT4), and brain-derived neurotrophic factor (BDNF). Materials and Methods: Microglial cells were incubated with 50 μg/ml AMYb, or 1 μg/ml of LPS plus 100 U/ml recombinant murine IFNg, and/or one of three different concentrations (0.1, 1.0, and 5.0 U/ml) of recombinant mouse EPO for 24 h. Results: EPO 0.1 U/ml dose significantly increased NT4 levels compared to EPO 5.0 U/ml dose (P < 0.05). EPO, in all doses, and AMYb significantly induced NT4 secretion in microglias, while BDNF and NT3 were not changed by AMYb or EPO. LPS + IFNg alone did not change neurotrophic factor levels in any group. However, EPO with LPS and IFNg induced NT4 secretion, especially the 5.0 U/ml dose of EPO. Conclusions: NT4 secretion, which was markedly induced by exposure to both AMYb and EPO in N9 murine microglias, may be an important result for neuronal survival. These results suggest that inflammatory mechanisms in microglia may also involve the neuroprotective response of these cells; this may be a promising area of study of neurodegenerative processes.
Özet
Aim: In this study, we investigated whether interferon gamma (IFNg), lipopolysaccharides (LPS) and amyloid beta (AMYb), as toxic stimulator agents, and erythropoietin (EPO), as a neurotrophic agent, have an effect on the production of the following neurotrophic factors in the N9 murine microglia cell line: neurotrophin 3 (NT3), neurotrophin 4 (NT4), and brain-derived neurotrophic factor (BDNF). Materials and Methods: Microglial cells were incubated with 50 μg/ml AMYb, or 1 μg/ml of LPS plus 100 U/ml recombinant murine IFNg, and/or one of three different concentrations (0.1, 1.0, and 5.0 U/ml) of recombinant mouse EPO for 24 h. Results: EPO 0.1 U/ml dose significantly increased NT4 levels compared to EPO 5.0 U/ml dose (P < 0.05). EPO, in all doses, and AMYb significantly induced NT4 secretion in microglias, while BDNF and NT3 were not changed by AMYb or EPO. LPS + IFNg alone did not change neurotrophic factor levels in any group. However, EPO with LPS and IFNg induced NT4 secretion, especially the 5.0 U/ml dose of EPO. Conclusions: NT4 secretion, which was markedly induced by exposure to both AMYb and EPO in N9 murine microglias, may be an important result for neuronal survival. These results suggest that inflammatory mechanisms in microglia may also involve the neuroprotective response of these cells; this may be a promising area of study of neurodegenerative processes.