Related Experiment Videos
Abnormal lactate dehydrogenase isoenzyme pattern in a critically ill patient
Southern Medical Journal
|July 1, 1984
Summary
A novel lactate dehydrogenase isoenzyme, LD6, found in patient serum and tissue indicates a poor prognosis. This abnormal isoenzyme is not an artifact and may originate from lysosomal rupture during shock.
Area of Science:
- Biochemistry
- Clinical Chemistry
- Pathophysiology
Background:
- Lactate dehydrogenase (LD) is a key enzyme in cellular metabolism.
- LD exists in multiple isoenzyme forms, reflecting tissue-specific expression.
- Abnormal LD isoenzymes can serve as diagnostic or prognostic markers.
Observation:
- A patient presented with an abnormal lactate dehydrogenase isoenzyme, designated LD6, detected in both serum and tissue samples.
- The presence of LD6 was associated with a poor clinical prognosis.
- Biochemical analysis confirmed LD6 is a genuine isoenzyme, not an artifact or immunoglobulin complex.
Findings:
- LD6 contains the M (muscle) subunit but lacks the H (heart) subunit.
- The isoenzyme is biochemically distinct and not an artifact or immunoglobulin complex.
- LD6 is hypothesized to arise from lysosomal rupture during severe shock events.
Implications:
- LD6 may serve as a novel biomarker for poor prognosis in critically ill patients.
- Understanding LD6's origin could elucidate shock-induced cellular damage mechanisms.
- Further research into LD6 could reveal new diagnostic or therapeutic targets for shock-related conditions.