Related Experiment Videos
A rapid enzymatic assay for total blood polyamines
1Research and Development Division, Amano Pharmaceutical Co., Ltd., Nagoya, Japan.
Clinical Biochemistry
|June 1, 1987
Summary
A new enzymatic assay accurately measures total blood polyamines, including putrescine, cadaverine, spermidine, and spermine. This rapid and reliable method offers a superior alternative for clinical diagnostics.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Clinical Diagnostics
Background:
- Polyamines are crucial biological molecules involved in cell growth and differentiation.
- Accurate quantification of blood polyamines is essential for diagnosing various physiological and pathological conditions.
- Existing methods for polyamine analysis can be time-consuming, complex, or lack sufficient sensitivity.
Purpose of the Study:
- To develop a rapid, reliable, and sensitive enzymatic assay for the determination of total polyamines in whole blood.
- To validate the performance characteristics of the new assay, including detection limit, interference, recovery, and precision.
- To compare the results obtained with the novel enzymatic assay against established methods like HPLC.
Main Methods:
- Utilized the substrate specificity of polyamine oxidase (PAO) from Aspergillus terreus and putrescine oxidase (PUO) from Micrococcus rubens.
- Quantified hydrogen peroxide generated during the enzymatic reaction via spectrophotometry at 555 nm using a quinone dye.
- Determined total amounts of putrescine (Put), cadaverine (Cad), spermidine (Spd), and spermine (Spm).
Main Results:
- Achieved a minimum detection limit of approximately 0.4 µmol/L in whole blood.
- Demonstrated minimal interference from common blood components like bilirubin, hemoglobin, reducing substances, and anticoagulants.
- Exhibited excellent analytical recovery (average 98.5%) and high precision (within-run: 1.02-2.84%; between-day: 1.54-3.27%).
- Showed strong correlation with HPLC (r = 0.955) and enzymatic differential methods (r = 0.944).
Conclusions:
- The developed enzymatic assay provides a rapid, reliable, and sensitive method for quantifying total blood polyamines.
- The assay demonstrates excellent analytical performance and minimal interference, making it suitable for clinical applications.
- This novel method is considered superior to existing assays for blood polyamine determination.