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Endothelial tissue pathological alterations demonstrated in mice naturally infected with Sarcocystis
T A Morsy1, M M Abdel Mawla, H M Fahmy
1Department of Parasitology, Faculty of Medicine, Ain Shams University, Abbassia, Cairo, Egypt.
Abstract:
Comparative electron microscopical study showed a spectrum of cytopathological changes ranging from exudative to obstructive inflammation of the vascular endothelium in mice naturally infected with Sarcocystis. The endothelial cells changes were characteristic of necrotizing vasculitis and ischaemic injury indicating loss of metabolic integrity and impaired perfusion. Signs of chronic inflammation and reflecting macrophage-lymphocyte interaction were also evident. The fact that the endothelial affection was not a consistent feature in all infected mice, indicates that such cytopathological alterations may often be temporary and repairable or more likely they are genetically predisposed.
Insights
Sarcocystis infection in mice causes vascular endothelium damage, including inflammation and injury. These changes, potentially temporary or genetic, impact blood flow and cell integrity.
Area of Science:
- Veterinary Pathology
- Parasitology
- Immunology
Background:
- Sarcocystis is a protozoan parasite with a complex life cycle.
- Vascular endothelium plays a crucial role in maintaining tissue homeostasis and regulating blood flow.
- Parasitic infections can induce significant inflammatory and pathological responses in the host.
Purpose of the Study:
- To investigate the cytopathological alterations in the vascular endothelium of mice naturally infected with Sarcocystis.
- To characterize the nature and extent of endothelial cell damage.
- To explore the potential mechanisms and implications of these changes.
Main Methods:
- Comparative electron microscopy was employed to examine endothelial cell changes.
- Mice naturally infected with Sarcocystis were studied.
- Histopathological analysis focused on inflammatory and injury markers.
Main Results:
- A spectrum of cytopathological changes was observed, including exudative and obstructive inflammation of the vascular endothelium.
- Endothelial cell alterations were consistent with necrotizing vasculitis and ischemic injury.
- Evidence of chronic inflammation and macrophage-lymphocyte interactions was present.
- Endothelial affection was not uniformly observed across all infected mice.
Conclusions:
- Sarcocystis infection induces significant cytopathological changes in the vascular endothelium of mice.
- These alterations suggest impaired metabolic integrity and perfusion, characteristic of vasculitis and ischemic injury.
- The variable occurrence of endothelial changes implies they may be temporary, repairable, or genetically influenced.
