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Related Experiment Videos

A surface invasive cleavage assay for highly parallel SNP analysis.

Manchun Lu1, Michael R Shortreed, Jeff G Hall

  • 1Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin, USA.

Human Mutation
|April 5, 2002
PubMed
Summary
This summary is machine-generated.

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This study presents surface-based invasive cleavage reactions for sensitive single-nucleotide polymorphism (SNP) detection. Both tested strategies enable direct detection of target DNA molecules without amplification.

Area of Science:

  • Molecular Biology
  • Biochemistry
  • Genetics

Background:

  • Structure-specific invasive cleavage by 5' nucleases offers sensitive detection of single-nucleotide polymorphisms (SNPs).
  • Solution-phase reactions can detect as few as 600 target molecules without prior amplification.

Purpose of the Study:

  • To adapt the invasive cleavage reaction to an addressed array format for parallel SNP analysis.
  • To design and test two surface-based invasive cleavage reaction strategies.

Main Methods:

  • Developed two surface invasive cleavage reaction strategies using a synthetic oligonucleotide targeting the human ApoE gene's codon 158 polymorphic site.
  • Strategy 1: Upstream oligonucleotide in solution. Strategy 2: Upstream and probe oligonucleotides co-immobilized on the surface.
  • Tested signal amplification based on target concentration and reaction time.

Related Experiment Videos

Main Results:

  • Both surface-based strategies demonstrated target-concentration and time-dependent signal amplification.
  • The study discusses parameters influencing the rate of surface-invasive cleavage reactions.

Conclusions:

  • Surface-based invasive cleavage reactions are viable for sensitive SNP detection in an array format.
  • The developed strategies show promise for parallel SNP analysis without requiring target amplification.