Estimation of the energy of cytoplasmic movements by magnetometry: effects of temperature and intracellular concentration of ATP

Ferrimagnetic particles ( gamma -Fe/sub 2/O/sub 3/) were spontaneously phagocytized by pulmonary macrophages obtained from the lungs of hamsters. Changes in the energy of the movements of the intracellular structures and also in the apparent viscosity of the cytoplasm were estimated by means of the...

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Bibliographic Details
Published in:IEEE transactions on biomedical engineering 1989-06, Vol.36 (6), p.598-607
Main Authors: Nemoto, I., Ogura, K., Toyotama, H.
Format: Article
Language:English
Subjects:
Adenosine Triphosphate - metabolism
Animals
Biological and medical sciences
Cell structures and functions
Cells (biology)
Cricetinae
Cytoplasmic Streaming
Cytoskeleton, cytoplasm. Intracellular movements
Energy Metabolism
Ferric Compounds
Ferrimagnetic materials
Fundamental and applied biological sciences. Psychology
In vitro
Lungs
Macrophages
Magnetic field measurement
Magnetics
Magnetization
Male
Mesocricetus
Molecular and cellular biology
Particle measurements
Phagocytosis
Temperature
Viscosity
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Summary:Ferrimagnetic particles ( gamma -Fe/sub 2/O/sub 3/) were spontaneously phagocytized by pulmonary macrophages obtained from the lungs of hamsters. Changes in the energy of the movements of the intracellular structures and also in the apparent viscosity of the cytoplasm were estimated by means of the magnetometric method. The changes were created by lowering the incubation temperature or by decreasing the intracellular concentration of ATP (adenosine triphosphate). Although the low temperature decreased the energy and increased the apparent viscosity, the low concentration of ATP decreased the energy but had little effect on the apparent viscosity. Estimation of these parameters was based on a previously proposed model.< >
ISSN:0018-9294
1558-2531
DOI:10.1109/10.29454