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Lysophosphatidylcholine accumulation in ischemic human myocardium
S P Sedlis1, M Hom, J M Sequeira
1Cardiology Division, New York Department of Veterans Affairs Medical Center, NY.
The Journal of Laboratory and Clinical Medicine
|January 1, 1993
Summary
Lysophosphatidylcholine accumulation in human heart tissue indicates myocardial ischemia. This finding helps identify heart injury during ischemic events.
Area of Science:
- Cardiology
- Biochemistry
Background:
- Lysophosphatidylcholine (LPC) is known to cause cell injury in cardiac myocytes.
- Its role in human myocardial injury during ischemia was previously unclear.
Purpose of the Study:
- To investigate whether lysophosphatidylcholine accumulation is injurious to human myocardium during ischemia.
- To determine if LPC accumulation serves as a marker for myocardial ischemia in humans.
Main Methods:
- Human myocardium samples were obtained during cardiac surgery and subjected to in vitro ischemia.
- Lysophosphatidylcholine levels in tissue and buffer were measured.
- Lactate dehydrogenase (LDH) depletion was assessed as an indicator of cell injury.
Main Results:
- Total lysophosphatidylcholine concentration significantly increased in ischemic human myocardium compared to baseline.
- Ischemia led to a 26% depletion of tissue lactate dehydrogenase, indicating cell injury.
- Lysophosphatidylcholine release into the incubation buffer was observed during ischemia, unlike in controls.
Conclusions:
- Lysophosphatidylcholine accumulation is a significant finding in human myocardial ischemia.
- The study identifies lysophosphatidylcholine as a potential biomarker for detecting myocardial ischemia in humans.