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Investigating Cardiac Metabolism in the Isolated Perfused Mouse Heart with Hyperpolarized [1-13C]Pyruvate and 13C/31P NMR Spectroscopy
Published on: April 21, 2023
[Metabolic changes in blood cells in various forms of ischemic heart disease]
Insights
Enzymatic activity in leukocytes and erythrocytes is altered in heart ischemic disease, impacting cellular function and blood properties. Measuring these changes aids in diagnosing various types of ischemic heart conditions.
Area of Science:
- Biochemistry
- Hematology
- Cardiology
Context:
- Heart ischemic disease encompasses conditions like stenocardia and myocardial infarction.
- Leukocytes and erythrocytes exhibit metabolic alterations in patients with ischemic heart disease.
Purpose:
- To investigate alterations in enzymatic activity within leukocytes and erythrocytes in various clinical types of heart ischemic disease.
- To correlate these metabolic changes with disease severity and cellular functions.
Summary:
- Distinct alterations in glycolysis and Krebs cycle enzyme activity were observed in leukocytes, particularly in large-scale myocardial infarction.
- Functional impairments in leukocytes, cellular immunity, and altered hydrolytic enzyme activity contribute to energy metabolism changes.
- Erythrocytes show altered gas transport functions and increased pentose-phosphate shunt activity, affecting blood rheology.
Impact:
- Enzymatic activity estimation in blood cells is crucial for diagnosing different types of heart ischemic disease.
- Understanding these metabolic shifts provides insights into disease pathophysiology and potential diagnostic markers.
Abstract:
In various clinical types of heart ischemic disease (stenocardia of stress and rest, large scale- and small scale myocardial infarction) alterations in activity of glycolysis and Krebs cycle enzymes as measured in leukocytes were especially distinct under conditions of large scale myocardial infarction as compared with the small scale infarction and stenocardia. Energy metabolism of leukocytes in heart ischemic disease was altered due to functional impairment of these cells, of the cellular immunity state as well as to the alteration in the activity of hydrolytic enzymes of leukocytes accumulating in the inflammatory infiltrate in myocardium. In the ischemic disease of heart the gas transport functions of erythrocytes were altered; the cells, exhibiting high resistance and elevated activity of the pentose-phosphate shunt, were found in circulation. The metabolic alterations in erythrocytes affected the rheological properties of blood. Estimation of enzymatic activity in blood cells is important for diagnosis of the heart ischemic disease of various types.
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