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Stimulation of cellular ingestion by basic proteins in vitro.
British Journal of Cancer
|April 1, 1976
Summary
Histone and polylysine significantly enhance the uptake of carbon and benzpyrene particles by cells in vitro. This finding has implications for understanding chemical carcinogenesis in vivo.
Area of Science:
- Cell biology
- Toxicology
- Biochemistry
Background:
- Cellular uptake of particulate matter is crucial for understanding toxicological effects.
- Chemical carcinogenesis involves the interaction of exogenous substances with cellular components.
Purpose of the Study:
- To investigate the effect of histone and polylysine on the in vitro uptake of carbon and benzpyrene particles by mammalian cells.
- To explore the potential role of these substances in modulating cellular interactions with carcinogens.
Main Methods:
- In vitro cell culture experiments using rat peritoneal macrophages, baby hamster kidney (BHK-21) fibroblasts, and mouse L-cells.
- Quantification of particle uptake in the presence of histone, polylysine, or methylated bovine albumin.
Main Results:
- Histone and polylysine significantly increased the in vitro ingestion of carbon and benzpyrene particles by all tested cell types.
- Methylated bovine albumin did not show a significant effect on particle uptake.
- Pre-incubation of carbon particles with histone did not alter the uptake enhancement.
Conclusions:
- Histone and polylysine act as potent stimulators of particulate matter uptake by macrophages and fibroblasts in vitro.
- These findings suggest a potential mechanism influencing the bioavailability and cellular interaction of environmental pollutants and carcinogens in vivo.