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Quantitative Measurement of Intrathecally Synthesized Proteins in Mice
Published on: November 29, 2019
BLOOD PLASMA PROTEINS AS INFLUENCED BY INTRAVENOUS INJECTION OF GUM ACACIA
G P Heckel1, C C Erickson, C L Yuile
1Department of Pathology, The University of Rochester School of Medicine and Dentistry, Rochester, New York.
The Journal of Experimental Medicine
|October 30, 2009
Summary
Gum acacia injections in dogs lower plasma protein by dilution and decreased production, implicating the liver. Recovery takes weeks, with potential liver dysfunction and risks for clinical use.
Area of Science:
- Biochemistry
- Physiology
- Veterinary Medicine
Background:
- Plasma protein concentration is crucial for maintaining physiological balance.
- Gum acacia is a substance sometimes used in medical contexts, necessitating understanding of its effects.
Purpose of the Study:
- To investigate the effects of gum acacia injections on plasma protein concentration in dogs.
- To explore the mechanisms behind plasma protein reduction and the role of the liver.
Main Methods:
- Single and repeated intravenous injections of gum acacia in dogs.
- Monitoring plasma protein concentration, total circulating protein, plasma volume, and urinary nitrogen.
- Observing anatomical changes, particularly in the liver.
Main Results:
- Gum acacia injections caused a decrease in plasma protein concentration, partly due to dilution and significantly due to reduced total protein.
- Maximum protein decrease and concentration decrease occurred at different times; fibrinogen fluctuations were notable.
- Plasma protein levels returned to normal within 10-21 days, but total protein and plasma volume remained lower.
- Liver exhibited conspicuous anatomical changes, suggesting its role in plasma protein synthesis.
- Two potential mechanisms for protein reduction were proposed: impaired liver production and removal of plasma protein to regulate colloid osmotic pressure.
Conclusions:
- Gum acacia administration leads to a decrease in plasma protein concentration in dogs through dilution and reduced synthesis, with the liver playing a key role.
- The study suggests gum acacia can induce liver dysfunction and highlights potential dangers for clinical intravenous use.
- Gum acacia injections serve as a model for studying liver function disturbances and plasma protein regulation.
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