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Interleukin-6 production by macrophages from BALB/c mice with a chronic infection of lactic dehydrogenase virus
1Laboratory of Veterinary Hygiene, Faculty of Agriculture, Yamaguchi University, Japan.
Abstract:
The production of interleukin-6 (IL-6), which is known as a B cell differentiation factor, by peritoneal macrophages from mice with a chronic lactic dehydrogenase virus (LDV) infection was compared with that from uninfected mice. The same amounts of IL-6 were detected in the culture supernatant of macrophages from LDV-infected mice as those from uninfected mice. Furthermore IL-6 production of macrophages from LDV-infected and uninfected mice was not affected by the addition of indomethacin. These results suggested that many immunological alterations seen in LDV-infected mice may not be due to, at least in part, altered IL-6 production ability of macrophages and the IL-6 production may not be affected by cyclooxygenase-derived products.
Insights
Chronic lactic dehydrogenase virus (LDV) infection in mice does not alter macrophage interleukin-6 (IL-6) production. This suggests that immune changes in LDV-infected mice are not primarily due to altered IL-6 levels.
Area of Science:
- Immunology
- Virology
- Cell Biology
Background:
- Interleukin-6 (IL-6) is a key cytokine involved in B cell differentiation and immune responses.
- Lactic dehydrogenase virus (LDV) establishes chronic infections in mice, leading to various immunological alterations.
- The role of macrophage-derived IL-6 in LDV pathogenesis is not fully understood.
Purpose of the Study:
- To investigate the impact of chronic LDV infection on the interleukin-6 (IL-6) production capacity of peritoneal macrophages.
- To determine if cyclooxygenase-derived products influence IL-6 production in LDV-infected macrophages.
Main Methods:
- Peritoneal macrophages were isolated from chronically LDV-infected and uninfected control mice.
- Macrophage cultures were stimulated, and IL-6 levels in the supernatant were quantified.
- The effect of indomethacin, a cyclooxygenase inhibitor, on IL-6 production was assessed.
Main Results:
- Macrophages from LDV-infected mice produced comparable amounts of IL-6 to those from uninfected mice.
- IL-6 production by macrophages from both groups was not significantly affected by the addition of indomethacin.
- These findings indicate that cyclooxygenase-derived products do not modulate IL-6 production in this model.
Conclusions:
- Altered IL-6 production by macrophages is unlikely to be a primary cause of the immunological alterations observed in chronic LDV infection.
- The study suggests that IL-6 production in this context is independent of cyclooxygenase pathway activity.
