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Method for increasing the sensitivity of nucleic acid hybridization assays

  • US 4,824,776 A
  • Filed: 07/25/1985
  • Issued: 04/25/1989
  • Est. Priority Date: 07/25/1985
  • Status: Expired due to Term
First Claim
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1. The hybridization assay method for detecting a specific polynucleotide target sequence wherein a nucleic acid containing target sample in single stranded form is affixed to a support, contacted thereon under hybridizing conditions with a non-radioactive reporter group labeled single-stranded polynucleotide probe having a sequence complementary to the target sequence, said probe being bound to said affixed sample when the target is present, said probe hybridizing with said target sequence, then removing the unbound portion of said probe from said support, and detecting the presence of said probe by means of its reporter group, wherein the sensitivity of the assay is increased by employing the additional steps comprising:

  • (a) after removal of the unbound portion of the probe, dehybridizing the bound portion;

    (b) concentrating the dehybridized separated probe onto a solid support; and

    (c) detecting the presence of said probe on said solid support by means of said non-radioactive reporter group.

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