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Biochemical Measurement of Neonatal Hypoxia
Published on: August 24, 2011
New enzymatic method for determining D-arabinitol in serum
1Department of Clinical Hematology, Osaka City University Medical School, 1-4-3, Asahi-machi, Abeno-ku, Osaka 545-8585, Japan. hinom@med.osaka-cu.ac.jp
Journal of Basic Microbiology
|February 24, 2001
Summary
A novel reagent simplifies D-arabinitol determination using a stable enzyme, eliminating the need to remove D-mannitol. This new method offers high sensitivity and accuracy for clinical applications.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Clinical Diagnostics
Background:
- Accurate determination of D-arabinitol is crucial for clinical diagnostics.
- Existing commercial kits for D-arabinitol measurement can be complex and require D-mannitol elimination.
- Development of simpler, more sensitive detection methods is needed.
Purpose of the Study:
- To develop and validate a new, simplified reagent for D-arabinitol determination.
- To assess the sensitivity, precision, and accuracy of the novel method compared to commercial kits.
- To evaluate the clinical applicability of the new D-arabinitol assay.
Main Methods:
- Utilized a stable D-arabinitol 2-oxidoreductase from Bacillus sp. and a water-soluble tetrazolium salt for NADH detection.
- Developed a simplified assay that does not require D-mannitol elimination.
- Performed precision analysis (within-run and between-run CV) and correlation studies with a commercial kit ('Arabinitec-auto').
Main Results:
- The new reagent demonstrated high sensitivity for NADH detection.
- Within-run and between-run precisions were acceptable (CVs 2.4-6.9% and 3.1-8.7%).
- High correlation (r=0.964) was observed with a commercial kit, indicating satisfactory accuracy for clinical use, with no missed positive samples above the cut-off.
Conclusions:
- A new, simplified reagent for D-arabinitol determination has been successfully developed.
- The method offers high sensitivity, good precision, and satisfactory clinical accuracy.
- Further investigation is ongoing to understand and refine the method for specimens showing significant deviations.
