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Plasmodium berghei infection in mice. An ultrastructural study of immune complex nephritis
Abstract:
Renal glomeruli of Plasmodium berghei infected mice were studied electron microscopically. The endothelial cell proliferation and endothelial cytoplasmic changes were greatly stimulated on day 7, at the time when there were collections of dense granular aggregates in the glomerular capillary lumens and electron-dense deposits in the mesangial areas. The basement membrane lesion developed with the infiltration of polymorphonuclear leucocytes on day 14 with more electron-dense deposits in the mesangial areas and in the basement membrane. On the basis of these ultrastructural alterations and on previous findings of immune complex (P berghei antigen, mouse globulin and mouse beta1C globulin) deposits by immunofluorescent study, we concluded that glomerular lesions in P berghei infected mice are induced by immune mechanism.
Insights
Glomerular lesions in Plasmodium berghei infected mice result from immune complex deposition. Electron microscopy revealed ultrastructural changes indicating an immune-mediated mechanism in these malaria-induced kidney injuries.
Area of Science:
- Nephrology
- Immunology
- Parasitology
Background:
- Plasmodium berghei infection in mice serves as a model for malaria.
- Malaria can cause renal complications, but the precise mechanisms are not fully understood.
- Immune complex deposition is a suspected cause of kidney damage in malaria.
Purpose of the Study:
- To investigate the ultrastructural changes in renal glomeruli during Plasmodium berghei infection.
- To elucidate the role of immune mechanisms in the pathogenesis of glomerular lesions.
Main Methods:
- Electron microscopy was used to examine renal glomeruli of infected mice at specific time points (day 7 and day 14).
- Immunofluorescent studies were previously conducted to detect immune complex deposits.
Main Results:
- Endothelial cell proliferation and cytoplasmic changes were observed on day 7.
- Dense granular aggregates and electron-dense deposits were found in glomerular capillaries and mesangial areas.
- Basement membrane lesions and polymorphonuclear leucocyte infiltration occurred by day 14, with increased electron-dense deposits.
Conclusions:
- Glomerular lesions in Plasmodium berghei infected mice are induced by immune mechanisms.
- Ultrastructural alterations correlate with the presence of immune complexes, suggesting immune complex-mediated glomerulonephritis.