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Published on: April 3, 2017
Influence of aerobic oxidation of mouse erythrocytes on their recognition by macrophages
G Olmos1, L A Lotero, A Herráez
1Departamento de Bioquímica y Biología Molecular, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain.
Abstract:
Membrane protein modification can change cell surface properties which can be correlated with altered macrophage-erythrocyte interactions. Mouse erythrocytes were incubated in phosphate buffer for different times to induce protein modification. Mouse erythrocyte membrane changes were analyzed by infrared analyses and gel electrophoresis. Proteolytic digestion of membrane proteins was observed. After 22 hours preliminary incubation, the number of erythrocytes adhering to a monolayer of macrophages reached a maximum, the majority of which had not been phagocytosed. Most of the erythrocytes incubated for 40 hours underwent phagocytosis after adhesion to the macrophages.
Insights
Membrane protein modification in erythrocytes alters interactions with macrophages. Modified erythrocytes show increased adhesion and phagocytosis by macrophages over time.
Area of Science:
- Cell biology
- Immunology
- Biochemistry
Background:
- Cell surface properties are influenced by membrane protein modifications.
- Macrophage-erythrocyte interactions are critical in cellular processes.
- Understanding these interactions is key to cellular communication.
Purpose of the Study:
- To investigate how erythrocyte membrane protein modification affects interactions with macrophages.
- To analyze the temporal changes in macrophage-erythrocyte adhesion and phagocytosis following protein modification.
Main Methods:
- Incubation of mouse erythrocytes in phosphate buffer to induce protein modification.
- Analysis of erythrocyte membrane changes using infrared spectroscopy and gel electrophoresis.
- Quantification of erythrocyte adhesion to and phagocytosis by macrophage monolayers.
Main Results:
- Proteolytic digestion of erythrocyte membrane proteins was observed during incubation.
- Erythrocyte adhesion to macrophages peaked at 22 hours of incubation, with minimal phagocytosis.
- Significant phagocytosis of erythrocytes by macrophages occurred after 40 hours of incubation.
Conclusions:
- Erythrocyte membrane protein modification significantly alters interactions with macrophages.
- The extent and nature of macrophage-erythrocyte interactions are dependent on the duration of erythrocyte incubation and subsequent protein modification.
- These findings provide insights into the dynamic changes in cell surface properties and their impact on cellular recognition and uptake.
