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[Macrophage disappearance reaction in mice during an infection caused by Coxsackie B3 virus]
Abstract:
Intraperitoneal inoculation of 2 1/2-3-month-old male BALB/c mice with Coxsackie B3 virus in a dose of 10(7.2) TCD50 was demonstrated to be accompanied by inhibition of the starch-induced exudation of leukocytes into the peritoneal cavity. A decrease in the number of macrophages was observed in 3-day exudates induced at 4 and 21 days but not at 0, 7, and 14 days of infection. The macrophage disappearance reaction showed that the intraperitoneal inoculation of the challenge virus dose (10(7.2) TCD50) was not accompanied at 4-5 hours by changes in the absolute number of macrophages in the pre-existing exudates, but an increase in the absolute number of lymphocytes was observed in the exudates induced at 0, 4, 7, and 14 days of infection, and of polymorphonuclear leukocytes in exudates induced at all the intervals studied. It is assumed that these changes, depending on the period of infection, may be determined by immunological and non-immunological mechanisms.
Insights
Coxsackie B3 virus infection in mice inhibits leukocyte exudation and alters macrophage and lymphocyte counts in peritoneal exudates. These immune cell changes suggest complex immunological and non-immunological responses during infection.
Area of Science:
- Virology
- Immunology
- Mouse models
Context:
- Coxsackie B3 virus (CVB3) is a significant human pathogen.
- Understanding viral impact on host immune responses is crucial for disease management.
Purpose:
- To investigate the effect of CVB3 infection on leukocyte exudation and peritoneal immune cell populations in a mouse model.
Summary:
- Intraperitoneal inoculation of male BALB/c mice with CVB3 (10^7.2 TCD50) inhibited starch-induced leukocyte exudation.
- A decrease in macrophages was noted in 3-day exudates at 4 and 21 days post-infection.
- Lymphocyte and polymorphonuclear leukocyte numbers increased in peritoneal exudates at various time points, suggesting complex immune modulation.
Impact:
- This study elucidates CVB3's early effects on innate and adaptive immune cell dynamics.
- Findings contribute to understanding viral pathogenesis and host-pathogen interactions.