[Electron microscopic study of horseradish peroxidase pinocytosis by white rat peritoneal macrophages in vivo]
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Tsitologiia
|May 1, 1981
Abstract:
Pinocytic activity of rat peritoneal macrophages has been studied morphometrically at the ultrastructural level, 1.5-50 minutes following the intraperitoneal administration of horseradish peroxidase at varying concentrations. Internalization of the tracer was carried out by relatively large vacuoles and coated microvesicles. A probable mechanism underlying the two structurally distinct kinds of pinocytosis by macrophages is discussed.
Insights
Rat peritoneal macrophages internalize tracers via large vacuoles and coated microvesicles. This study discusses the ultrastructural mechanisms of pinocytosis in these immune cells.
Area of Science:
- Cell Biology
- Immunology
- Microscopy
Context:
- Macrophages are key immune cells involved in phagocytosis and pinocytosis.
- Understanding pinocytic mechanisms is crucial for cellular function and drug delivery.
- Horseradish peroxidase is a common tracer used in cellular uptake studies.
Purpose:
- To investigate the ultrastructural mechanisms of pinocytic activity in rat peritoneal macrophages.
- To characterize the role of vacuoles and microvesicles in tracer internalization.
- To elucidate the distinct pathways of pinocytosis utilized by macrophages.
Summary:
- Rat peritoneal macrophages were studied morphometrically at the ultrastructural level after intraperitoneal administration of horseradish peroxidase.
- Tracer uptake occurred through two distinct structures: large vacuoles and coated microvesicles.
- The findings provide insights into the probable mechanisms of these two types of pinocytosis.
Impact:
- This research enhances our understanding of macrophage pinocytosis at a ultrastructural level.
- The findings could inform strategies for targeted drug delivery using macrophages.
- Provides a basis for further research into macrophage-mediated transport processes.