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Persistent injury-associated anemia in aged rats
Tyler J Loftus1, Kolenkode B Kannan1, Christy S Carter2
1University of Florida Health, Department of Surgery and Sepsis and Critical Illness Research Center, Gainesville, FL, United States.
Experimental Gerontology
|January 9, 2018
Summary
Aged rats subjected to trauma and stress developed persistent anemia, characterized by elevated catecholamines and reduced red blood cell production. These findings suggest a link between injury, stress, and anemia in older individuals.
Area of Science:
- Gerontology
- Hematology
- Trauma Pathophysiology
Background:
- Hypercatecholaminemia and bone marrow dysfunction are linked to persistent injury-associated anemia.
- Elderly individuals may be susceptible due to higher catecholamine levels and impaired erythroid growth.
Purpose of the Study:
- To investigate persistent injury-associated anemia in aged rats subjected to severe trauma and chronic stress.
- To test the hypothesis that aged rats experience persistent anemia after injury and stress.
Main Methods:
- Aged F344-BN rats were subjected to lung contusion, hemorrhagic shock, and chronic restraint stress.
- Urine norepinephrine, locomotor activity, bone marrow cellularity, erythroid progenitor growth, and hemoglobin levels were assessed.
- Norepinephrine levels, locomotor function, progenitor growth, and hemoglobin were analyzed in different experimental groups.
Main Results:
- Norepinephrine levels were significantly elevated in trauma/stress groups compared to controls.
- Chronic stress impaired locomotor activity.
- Erythroid progenitor growth and hemoglobin levels were significantly reduced in aged rats experiencing trauma and stress.
Conclusions:
- Persistent injury-associated anemia was observed in aged rats.
- Further research is required to understand if this differs from younger rats and to apply findings to elderly trauma patients.
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