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Leukemic cell creatine kinase and its isoenzymes
Chinese Medical Journal
|June 1, 1989
Summary
Leukemia patients exhibit significantly higher cellular creatine kinase (CK) activity compared to healthy individuals. Specific CK isoenzyme patterns, like CK-BB, may indicate unique metabolic characteristics in leukemia cells.
Area of Science:
- Biochemistry
- Oncology
- Cellular Metabolism
Background:
- Cellular creatine kinase (CK) is crucial for cellular energy homeostasis.
- Altered enzyme activity is often observed in various cancers, including leukemia.
- Understanding CK isoenzyme profiles can provide insights into cancer cell metabolism.
Purpose of the Study:
- To investigate cellular creatine kinase (CK) activity and isoenzyme patterns in leukemia patients.
- To compare CK levels and isoenzyme distribution between leukemia cells and normal leukocytes.
- To explore the potential metabolic implications of observed CK alterations in leukemia.
Main Methods:
- Utilized malachite green single agent coloration for CK activity assay.
- Employed acetate membrane electrophoresis for CK isoenzyme analysis.
- Analyzed samples from 7 normal controls and 26 leukemia patients.
Main Results:
- Leukemic cells showed significantly elevated CK activity (12.62 ± 4.86 u/mg protein) compared to normal controls (5.73 ± 2.66 u/mg protein, p < 0.05).
- CK isoenzyme MM was detected in only 2 of 5 normal leukocyte samples.
- CK isoenzymes were present in 22 leukemia patients, with CK-BB predominant in acute granulocytic leukemia and CK-MM in other types; CK-MB was found in 6 patients.
Conclusions:
- Elevated cellular CK activity is a characteristic of leukemia.
- The presence and distribution of CK isoenzymes (CK-BB, CK-MM, CK-MB) differ between leukemia subtypes and normal leukocytes.
- The recurrence of CK-BB may suggest atavism, while enhanced anaerobic glycolysis and accelerated energetic turnover could be key metabolic features of leukemic cells.