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Observations on the Fine Structure of Giant Mast Cells Produced by Microwave Radiation of the Peritoneal Fluid

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Esko J. Valtonen · 1967

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Five minutes of 80 W microwave radiation produced giant, swollen mast cells in the peritoneal fluid of rats.

Plain English Summary

Summary written for general audiences

Researchers irradiated rats with microwaves (5 minutes, 80 W, frequency of 2,425 ± 25 megacycles) and examined mast cells from the peritoneal fluid under an electron microscope. The microwaves produced giant mast cells with swollen cytoplasm, wider spacing between granules and partial disappearance of the granules. This 1967 study shows that a 5-minute microwave exposure can produce significant structural changes in rat mast cells.

Why This Matters

This early research from 1967 reports that microwave radiation can alter mast cells at the cellular level. Rats irradiated for 5 minutes at 80 W and examined three hours later had giant mast cells in the peritoneal fluid, with all granules remaining inside the cells and no signs of disruption. The researcher could not determine whether the formation of giant mast cells is reversible.

Finding

The most obvious feature of the giant mast cell is the swelling of the cytoplasm. The features of the giant mast. cell appeared to be abundant swelling of the cytoplasm, which increased the distance between the granules, and the partial disappearance of the granules. Disruption of the mast. cells, with escape of the granules, was not observed.

In their words

“The most obvious feature of the giant mast cell is the swelling of the cytoplasm. The features of the giant mast. cell appeared to be abundant swelling of the cytoplasm, which increased the distance between the granules, and the partial disappearance of the granules. Disruption of the mast. cells, with escape of the granules, was not observed.”
Cite This Study
Esko J. Valtonen (1967). Observations on the Fine Structure of Giant Mast Cells Produced by Microwave Radiation of the Peritoneal Fluid.
Show BibTeX
@article{observations_on_the_fine_structure_of_giant_mast_cells_produced_by_microwave_rad_g5149,
  author = {Esko J. Valtonen},
  title = {Observations on the Fine Structure of Giant Mast Cells Produced by Microwave Radiation of the Peritoneal Fluid},
  year = {1967},
  
  
}
No DOI on file for this study.

Quick Questions About This Study

The cytoplasm of the mast cells swelled markedly, which increased the distance between the granules, and the granules partly disappeared. The giant mast cells were much larger than normal mast cells, and their granules stayed inside the cell with no signs of disruption.
The rats were irradiated for 5 minutes at 80 W with a microwave apparatus of 2,425 ± 25 megacycles, and the peritoneal fluid was examined three hours after irradiation.
The researchers couldn't determine whether the cellular changes were reversible based on this study. It remains unknown if mast cells can return to normal structure after microwave exposure ends.
Electron microscopy was used to examine the fine internal structure of the mast cells, while light microscopy of smears showed the presence of giant mast cells in the peritoneal fluid of the irradiated animals.
No, the granules remained inside the giant mast cells and there were no signs of disruption, although rapid degranulation and disruption are the usual occurrences when mast cells are irritated.