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Glucagon and noradrenaline reduce erythrocyte deformability
P Valensi1, F Gaudey, J Parries
1Laboratoire d'Endocrinologie Clinique et Métabolique, Université Paris-Nord, Hôpital Jean Verdier, Bondy, France.
Metabolism: Clinical and Experimental
|September 1, 1993
Summary
Stress hormones norepinephrine and glucagon significantly increase red blood cell (RBC) rigidity. This impaired RBC deformability may contribute to atherosclerosis development in various diseases.
Area of Science:
- Biomedical science
- Hematology
- Cardiovascular research
Background:
- Red blood cell (RBC) deformability is crucial for circulation.
- Impaired RBC deformability is linked to diseases like atherosclerosis.
- The role of stress hormones in RBC mechanics is not fully understood.
Purpose of the Study:
- To investigate the in vitro effects of norepinephrine and glucagon on RBC filterability.
- To determine the impact of varying concentrations of these hormones on RBC rigidity.
Main Methods:
- Utilized the Hanss hemorrheometer for RBC filterability measurements.
- Quantified RBC rigidity using the rigidity index (RI).
- Tested RBCs from healthy subjects exposed to norepinephrine and glucagon.
Main Results:
- Norepinephrine (10⁻⁷ to 10⁻⁴ mol/L) significantly increased RBC rigidity index (RI).
- Glucagon (0.01 to 5 ng/mL) also significantly elevated the RI.
- Maximal effects observed at 10⁻⁶ mol/L norepinephrine and 1 ng/mL glucagon.
Conclusions:
- Norepinephrine and glucagon demonstrably impair RBC deformability in vitro.
- These stress hormones may play a role in the rheologic abnormalities seen in diseases.
- Findings suggest a potential link between stress hormones, RBC mechanics, and atherosclerosis pathogenesis.