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Positron Emission Tomography Using 64-Copper as a Tracer for the Study of Copper-Related Disorders
Published on: April 28, 2023
RED CELL AND PLASMA RADIOACTIVE COPPER IN NORMAL AND ANEMIC DOGS
H Yoshikawa1, P F Hahn, W F Bale
1Departments of Pathology and Radiology, University of Rochester School of Medicine and Dentistry, Rochester, New York.
The Journal of Experimental Medicine
|October 30, 2009
Summary
Radioactive copper is quickly absorbed by dogs, peaking in plasma within 2-5 hours and entering red blood cells. Accelerated red blood cell production may increase copper uptake.
Area of Science:
- Veterinary Medicine
- Biochemistry
- Radiochemistry
Background:
- Copper is an essential trace element vital for various physiological processes.
- Understanding copper metabolism is crucial for diagnosing and treating related disorders.
Purpose of the Study:
- To investigate the absorption, distribution, and kinetics of ingested radioactive copper in dogs.
- To explore the relationship between hematopoietic activity and radio-copper uptake.
Main Methods:
- Administration of radioactive copper to canine subjects.
- Serial blood sampling to measure radio-copper concentration in plasma and red blood cells.
- Analysis of copper distribution over a 2-day period.
Main Results:
- Radioactive copper rapidly appeared in plasma, reaching peak concentration within 2-5 hours post-ingestion.
- Significant amounts of radio-copper were detected in circulating red blood cells.
- A gradual increase in red blood cell radio-copper concentration was observed over 48 hours.
- Enhanced uptake of radio-copper was noted in dogs with accelerated hematopoietic activity, possibly due to increased adsorption by new red blood cells.
Conclusions:
- Ingested radioactive copper is rapidly absorbed and distributed in dogs, with distinct plasma and red blood cell kinetics.
- Hematopoietic activity influences radio-copper uptake, suggesting a role for red blood cell dynamics in copper metabolism.
