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13:21
Chemically-blocked Antibody Microarray for Multiplexed High-throughput Profiling of Specific Protein Glycosylation in Complex Samples
Published on: May 4, 2012
Protein glycation: measurement and clinical relevance
1Klinisch-chemisches Institut, Krankenhaus München-Schwabing, München, F.R.G.
Journal of Clinical Chemistry and Clinical Biochemistry. Zeitschrift Fur Klinische Chemie Und Klinische Biochemie
|September 1, 1989
Summary
Glycated serum proteins offer medium-term glycemic control insights, complementing glycated hemoglobin tests for improved diabetes management. Their clinical utility is still debated due to assay variability.
Area of Science:
- Biochemistry
- Clinical Chemistry
- Endocrinology
Background:
- Protein glycation is a key biochemical process influencing blood protein modification.
- Accurate determination of glycated proteins is crucial for clinical diagnostics, particularly in diabetes management.
- Existing methods for measuring glycated proteins vary in principle and accuracy.
Purpose of the Study:
- To review the biochemical basis, determination methods, and clinical significance of glycated blood proteins.
- To critically evaluate current assays for glycated serum proteins and their laboratory practicality.
- To assess the role of glycated serum proteins in diabetes detection and monitoring.
Main Methods:
- Review of binding methods (boronate affinity, immunoassay, phenylhydrazine binding, ion exchange chromatography) and chemical methods (hydrolysis, fructosamine assay).
- Discussion of reaction principles, including stoichiometric and nonstoichiometric reactions.
- Analysis of laboratory variability and practical considerations for assay implementation.
Main Results:
- Binding methods preserve the analyte, while chemical methods destroy it.
- Assay results vary due to nonstoichiometric reactions, impacting inter-laboratory consistency.
- The fructosamine assay is practical but suffers from unspecific side reactions; no single assay is ideal.
- Glycated serum proteins reflect shorter-term glycemic changes than glycated hemoglobin.
Conclusions:
- Glycated serum proteins may offer complementary information to glycated hemoglobin for diabetes management.
- Their role in discriminating between normal and diabetic states requires further investigation.
- Current variability in assays hinders definitive clinical evaluation and widespread adoption.
- Glycated serum proteins are best utilized as a complementary test for enhanced laboratory control of diabetic patients.
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