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Measuring Phagosome pH by Ratiometric Fluorescence Microscopy
Published on: December 7, 2015
EFFECT OF THE HYDROGEN ION CONCENTRATION ON THE PHAGOCYTOSIS AND ADHESIVENESS OF LEUCOCYTES
1Laboratory of Applied Physiology, Harvard Medical School, Boston.
The Journal of General Physiology
|October 30, 2009
Summary
Leukocyte (white blood cell) adhesiveness to glass is highest in alkaline conditions (pH > 8.0). Phagocytosis of quartz particles by leukocytes is most effective near neutral pH (7.0) for movement and slightly acidic pH (6.7) for particle uptake.
Area of Science:
- Biochemistry
- Cell Biology
- Immunology
Background:
- Leukocyte function, including adhesion and phagocytosis, is influenced by environmental factors.
- Understanding the optimal conditions for these cellular processes is crucial for various biological and medical applications.
Purpose of the Study:
- To investigate the effect of pH on leukocyte adhesiveness to glass.
- To determine the optimal pH for phagocytosis of quartz particles by leukocytes.
Main Methods:
- Experiments were conducted to assess leukocyte adhesiveness to glass at different pH levels.
- Phagocytosis assays were performed using quartz particles suspended in solutions of varying pH.
Main Results:
- Leukocyte adhesiveness to glass was maximal at pH 8.0 and above.
- Leukocyte agglutination increased as the hydrogen ion concentration increased from pH 8.0 to 6.0.
- The optimal pH for phagocytosis, where leukocytes moved and ingested particles, was 7.0.
- The optimal pH for phagocytosis of quartz from suspension was found to be slightly acidic, around pH 6.7.
- Leukocyte adhesiveness to glass increased with alkalinity, while phagocytosis of quartz increased with acidity.
Conclusions:
- pH significantly impacts both leukocyte adhesiveness and phagocytic activity.
- Leukocyte adhesiveness to glass is favored by alkaline conditions.
- Phagocytosis of quartz particles is more efficient under slightly acidic conditions, with optimal movement observed at neutral pH.
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