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Trypsin-sensitive plasmodia in the liver of post-infection rats and rhesus monkeys
Abstract:
Kupffer cells from the liver and erythrocytes from peripheral blood were collected at the post-patent period from albino rats infected earlier with Plasmodium berghei and rhesus monkeys infected earlier with P. cynomolgi var. bastianelli or P. knowlesi. The cells were subinoculated into individual normal recipients. These recipients subsequently showed parasitaemia in their circulation. The parasites present in Kupffer cell preparations were found to be sensitive to trypsin treatment, while those in erythrocytes were found to be resistant to trypsin treatment. This differential sensitivity of parasites to trypsin was observed in all the three species of plasmodia studied so far.
Insights
Plasmodium parasites in Kupffer cells are trypsin-sensitive, while those in erythrocytes are trypsin-resistant. This difference was observed across three Plasmodium species, offering insights into parasite biology.
Area of Science:
- Parasitology
- Immunology
- Cell Biology
Background:
- Kupffer cells are resident macrophages in the liver.
- Erythrocytes are red blood cells.
- Plasmodium species cause malaria.
Purpose of the Study:
- To investigate the differential sensitivity of Plasmodium parasites to trypsin treatment.
- To determine if parasite location (Kupffer cells vs. erythrocytes) affects trypsin sensitivity.
Main Methods:
- Collected Kupffer cells and erythrocytes from infected rats and monkeys.
- Subinoculated cells into naive recipients.
- Observed parasitemia in recipients.
- Treated parasite preparations with trypsin.
Main Results:
- Parasites from Kupffer cell preparations were sensitive to trypsin.
- Parasites from erythrocyte preparations were resistant to trypsin.
- This differential sensitivity was consistent across Plasmodium berghei, P. cynomolgi, and P. knowlesi.
Conclusions:
- Plasmodium parasites exhibit differential trypsin sensitivity based on their cellular location.
- This finding may have implications for understanding parasite-host interactions and developing new therapeutic strategies.