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Comparative biological and antitoxoplasmic effects of particulate and water-soluble polysaccharides, in vitro
Abstract:
Mouse peritoneal macrophages, but not HeLa cells, presented many characteristics of activated cells following treatment in culture with LTN or PSK. Indeed, they demonstrated increase in size, spread, endocytic and antiparasitic activities. These data lead favorably to consider that among the five polysaccharides tested under the present experimental model LTN and PSK are the most potent activators of resident mouse peritoneal macrophages in vitro. The mechanism of macrophage activation by LTN and PSK should be different from that of Di Luzio glucans and SPG since activated macrophages can be induced by the latter two compounds in experimental animals but not in vitro in cell cultures.
Insights
Lentinula edodes mycelia extract (LTN) and polysaccharide-K (PSK) activate mouse macrophages in vitro, enhancing their size, spread, and immune functions. These polysaccharides show potent in vitro macrophage activation, distinct from other tested compounds.
Area of Science:
- Immunology
- Cell Biology
- Pharmacology
Background:
- Macrophages are key immune cells involved in host defense.
- Polysaccharides are known to modulate immune responses.
- Understanding macrophage activation is crucial for developing immunotherapies.
Purpose of the Study:
- To investigate the in vitro effects of Lentinula edodes mycelia extract (LTN) and polysaccharide-K (PSK) on mouse peritoneal macrophages.
- To compare the activation potential of LTN and PSK with other polysaccharides.
- To elucidate the mechanism of macrophage activation by LTN and PSK.
Main Methods:
- Primary culture of mouse peritoneal macrophages and HeLa cells.
- Treatment with LTN, PSK, Di Luzio glucans, and SPG.
- Assessment of cellular characteristics including size, spread, endocytic activity, and antiparasitic activity.
Main Results:
- LTN and PSK induced significant activation in mouse peritoneal macrophages but not in HeLa cells.
- Activated macrophages exhibited increased size, enhanced spread, and improved endocytic and antiparasitic activities.
- LTN and PSK demonstrated potent in vitro activation of resident mouse peritoneal macrophages.
Conclusions:
- LTN and PSK are potent in vitro activators of mouse peritoneal macrophages.
- The mechanism of macrophage activation by LTN and PSK differs from that of Di Luzio glucans and SPG.
- These findings suggest LTN and PSK as potential candidates for modulating macrophage-mediated immunity.