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Macrophage clearance function and immune complex disease in New Zealand Black/White F1 hybrid mice
Abstract:
Macrophage clearance function in NZB, NZW, NZB/W, Ajax and B10D2 new mice was assessed by measurement of the rate of clearance (KPVP) of intravenously-injected 125I-labelled polyvinylpyrrolidone (PVP). There were significant strain and age-related variations in KPVP. In particular there was a marked fall in KPVP in NZB/W mice with increasing age. This fall was most apparent in female NZB/W and preceded the age at which renal disease usually develops in these animals. We suggest that ineffective macrophage function and production of low affinity antibody contribute to the early development of immune complex glomerulonephritis in these mice.
Insights
Macrophage clearance function declines with age in NZB/W mice, particularly females, before renal disease onset. This suggests impaired macrophage function contributes to early immune complex glomerulonephritis development.
Area of Science:
- Immunology
- Pathology
- Renal Medicine
Background:
- Macrophage clearance function is crucial for immune homeostasis.
- NZB/W mice are a model for studying autoimmune diseases like glomerulonephritis.
- Age-related decline in immune function is a known phenomenon.
Purpose of the Study:
- To assess macrophage clearance function in different mouse strains.
- To investigate age-related changes in macrophage clearance.
- To explore the link between macrophage function and glomerulonephritis in NZB/W mice.
Main Methods:
- Measurement of the clearance rate (KPVP) of intravenously-injected 125I-labelled polyvinylpyrrolidone (PVP).
- Assessment across NZB, NZW, NZB/W, Ajax, and B10D2 mouse strains.
- Analysis of KPVP variations related to mouse strain and age.
Main Results:
- Significant strain and age-related variations in KPVP were observed.
- A marked fall in KPVP was noted in NZB/W mice with increasing age.
- This decline was more pronounced in female NZB/W mice and preceded renal disease onset.
Conclusions:
- Ineffective macrophage function may contribute to early immune complex glomerulonephritis.
- Age-related decline in macrophage clearance is significant in NZB/W mice.
- Low affinity antibody production might also play a role in disease development.