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Related Experiment Videos

Single nucleotide polymorphism profiling assay to exclude serum sample mix-up.

C J J Huijsmans1, F G C Heilmann, A G M van der Zanden

  • 1Molecular Diagnostics, Jeroen Bosch Hospital, 5200 ME 's-Hertogenbosch, The Netherlands.

Vox Sanguinis
|February 15, 2007
PubMed
Summary

A novel single nucleotide polymorphism (SNP) profiling test can identify human serum sample mix-ups. This method links serum samples to their source, ensuring accurate clinical laboratory results and patient care.

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Area of Science:

  • Genomics
  • Clinical Diagnostics
  • Forensic Science

Background:

  • Sample mix-ups in clinical laboratories can compromise the accuracy of test results.
  • A unique genetic fingerprint, or single nucleotide polymorphism (SNP) profile, exists for each individual.
  • Developing methods to trace sample origins is crucial for maintaining data integrity.

Purpose of the Study:

  • To develop and validate a single nucleotide polymorphism (SNP) profiling test for detecting serum sample mix-ups.
  • To establish a reliable method for linking human serum samples to their original source.
  • To enhance the validity of clinical laboratory test results by preventing sample misidentification.

Main Methods:

  • DNA extraction from serum samples.
  • Application of commercially available single nucleotide polymorphism (SNP) amplification assays.

Related Experiment Videos

  • Real-time polymerase chain reaction (PCR) analysis using 10 selected SNP assays to generate unique SNP profiles.
  • Validation using a clinical case with inconsistent hepatitis E virus serological results.

    • Main Results:

    • The single nucleotide polymorphism (SNP) profiling test successfully generated distinct genetic profiles from serum samples.
    • The method was applied to a case with discordant hepatitis E virus test results, revealing the inconsistency was due to the assay, not sample mix-up.
    • The probability of two unrelated individuals sharing an identical SNP profile was calculated to be 1 in 18,000.

    Conclusions:

    • A novel single nucleotide polymorphism (SNP) profiling assay has been developed for reliable human serum sample identification.
    • This method allows for direct sample-to-source linkage without the need for post-PCR processing.
    • The assay significantly reduces the risk of sample mix-ups, thereby securing downstream evaluations and critical patient management decisions.