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Coxsackievirus B3 murine myocarditis: deleterious effects of nonsteroidal anti-inflammatory agents
Abstract:
The effect of salicylates or indomethacin usage during viral infection was investigated in a murine model of coxsackievirus B3 myocarditis. Eighty-two 3-week-old CD1 mice received 3 x 10(5) median tissue culture infective dose (TCID50) of coxsackievirus B3 intraperitoneally. Then they received salicylates, indomethacin, or saline solution daily for 10 days. Mortality, viral and antibody titers, interferon levels, and pathologic changes in the heart were compared. Mortality (2/33, 4/15, and 0/34, respectively) and virus titers (10(4.72), 10(4.78), and 10(3.4) TCID50, respectively) were higher, interferon levels (300, 267, and 980 IU, respectively) were lower, and pathologic changes were worse in treated animals (antibody titers were similar). These findings indicate that nonsteroidal anti-inflammatory agents adversely affect the course of acute coxsackievirus B3 murine myocarditis. Determination of the pathogenesis of this deleterious effect requires thorough evaluation of virus-host interactions.
Insights
Nonsteroidal anti-inflammatory drugs like salicylates and indomethacin worsen outcomes in a mouse model of coxsackievirus B3 myocarditis. These agents increased mortality, viral load, and heart damage while lowering interferon levels.
Area of Science:
- Virology
- Immunology
- Pharmacology
Background:
- Viral myocarditis, particularly coxsackievirus B3, poses significant health risks.
- Nonsteroidal anti-inflammatory drugs (NSAIDs) are commonly used for symptom relief.
- The impact of NSAIDs on viral myocarditis pathogenesis is not fully understood.
Purpose of the Study:
- To investigate the effects of salicylates and indomethacin on coxsackievirus B3-induced myocarditis in mice.
- To evaluate the influence of NSAIDs on mortality, viral replication, and cardiac pathology.
Main Methods:
- A murine model of coxsackievirus B3 myocarditis was established using CD1 mice.
- Mice were treated daily for 10 days with salicylates, indomethacin, or saline solution.
- Outcomes including mortality, viral titers, antibody titers, interferon levels, and cardiac pathology were assessed.
Main Results:
- NSAID treatment was associated with increased mortality and higher viral titers compared to controls.
- Interferon levels were significantly lower in mice treated with salicylates or indomethacin.
- Worsened cardiac pathology was observed in NSAID-treated groups, while antibody titers remained similar.
Conclusions:
- Nonsteroidal anti-inflammatory agents adversely affect the course of acute coxsackievirus B3 murine myocarditis.
- NSAIDs may exacerbate viral myocarditis through mechanisms that warrant further investigation.
- Understanding virus-host interactions is crucial for elucidating the detrimental effects of NSAIDs in this context.