An assay for heparin by decrease in color yield (DECOY) of a protein-dye-binding reaction

Area of Science:

• Biochemistry
• Analytical Chemistry

Background:

• Heparin quantitation is crucial in biological research.
• Existing glycosaminoglycan assays lack specificity for heparin.
• Heparin interferes with the Bradford protein assay.

Purpose of the Study:

• To develop a sensitive and specific assay for heparin quantitation.
• To leverage the interference of heparin with the Bradford assay.

Main Methods:

• Utilizing the interference of heparin with the Bradford dye-binding assay.
• Distinguishing between uronic acid derivatives.
• Employing heparinase digestion or cetylpyridinium chloride precipitation for complex samples.

Main Results:

• A rapid and sensitive method for heparin quantitation was established.
• The assay demonstrates specificity for heparin among glycosaminoglycans.
• The method is applicable to complex biological samples.

Conclusions:

• The developed method offers a specific and sensitive approach for heparin quantification.
• This assay overcomes limitations of existing methods for sulfated polyanions.
• The technique is valuable for analyzing heparin content in biological matrices.