Creatine kinase isoenzymes: their separation and quantitation

Area of Science:

• Biochemistry
• Clinical Chemistry
• Enzymology

Background:

• Creatine kinase (CK) isoenzymes are crucial biomarkers, particularly CK-MB for cardiac conditions.
• Existing methods for CK isoenzyme separation and quantification have limitations in linearity, sensitivity, and reproducibility.
• The cardiospecificity of CK-MB necessitates reliable diagnostic tools.

Purpose of the Study:

• To develop and characterize an improved method for CK isoenzyme separation and quantification.
• To verify the cardiospecificity of the CK-MB isoenzyme.
• To assess the utility of the new method in diagnosing acute myocardial infarction and compare it with existing techniques.

Main Methods:

• Agarose gel electrophoresis coupled with optimized gel overlay incubation.
• NADPH elution for precise isoenzyme quantitation.
• Comparison with dithiothreitol activation and ion exchange chromatography methods.

Main Results:

• The developed agarose gel electrophoresis method demonstrates superior linearity, sensitivity, and reproducibility compared to cellulose acetate electrophoresis.
• The study verified the high cardiospecificity of the CK-MB isoenzyme.
• The method proved effective in the diagnosis of acute myocardial infarction.

Conclusions:

• The novel agarose gel electrophoresis technique offers a reliable and reproducible approach for CK isoenzyme analysis.
• This method enhances the diagnostic accuracy for acute myocardial infarction by accurately measuring CK-MB.
• The technique provides a valuable alternative to existing, less reliable methods.