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Carbohydrate-deficient transferrin evaluation in dry blood spots
P Bean1, M S Sutphin, P Necessary
1Specialty Laboratories, Inc., Santa Monica, California, USA.
Alcoholism, Clinical and Experimental Research
|February 1, 1996
Summary
Dry blood spots offer a reliable method for evaluating carbohydrate-deficient transferrin (CDT) using isoelectric focusing/immunoblotting/laser densitometry (IEF/IB/LD). This technique simplifies specimen collection, storage, and transport for CDT analysis.
Area of Science:
- Clinical Chemistry
- Biochemical Diagnostics
Background:
- Carbohydrate-deficient transferrin (CDT) is a biomarker.
- Accurate CDT measurement is crucial for clinical diagnostics.
Purpose of the Study:
- To evaluate the performance of isoelectric focusing/immunoblotting/laser densitometry (IEF/IB/LD) for CDT analysis from dry blood spots.
- To assess the feasibility of using dry blood spots as a sample source for CDT testing.
Main Methods:
- Serum and paired dry blood spot specimens from 50 individuals were analyzed for CDT using the IEF/IB/LD method.
- Stability of CDT in dry blood spots under various storage conditions was investigated.
Main Results:
- A highly significant correlation (r = 0.94, p < 0.0001) was observed between CDT values from serum and dry blood spots.
- Dry blood spots demonstrated stability for CDT analysis when stored properly for short-term (room temperature) or long-term (refrigerated or frozen) periods.
Conclusions:
- The IEF/IB/LD procedure is effective for evaluating CDT from dry blood spots.
- Dry blood spots provide a simplified, stable, and convenient alternative for CDT specimen collection, storage, and transportation.