Hybridization assay and means to be used in the assay
First Claim
1. A hybridization assay method for the detection of a nucleotide sequence of a nucleic acid in a sample, said method comprising the steps:
- (i) contacting under hybridization conditions the single stranded form of the sample nucleotide sequence with a single stranded nucleic acid probe, wherein;
a) said probe has a nucleotide sequence complementary to the sequence to be detected,b) said probe has a water-soluble polymer bearing a plurality of chelating structures covalently linked to said polymer, wherein said water-soluble polymer is of non-nucleic acid structure and is covalently linked to said nucleotide sequence complementary to the sequence to be detected, andc) said probe has a plurality of rare earth metal ions that together with said chelating structures forms a plurality of chelate groups covalently bound to said water-soluble polymer, and said rare earth metal is selected from the group consisting of Eu3+, Tb3+, Sm3+, and Dy3+, wherein said probe and covalently bound chelate groups are stable under hybridization assay conditions;
(ii) allowing a nucleotide sequence to be detected in said sample and the nucleotide sequence of said probe to form a double stranded nucleic acid; and
(iii) detecting the formation of double stranded nucleic acid containing said probe by measuring the time-resolved fluorescence from the rare earth metal ions incorporated as a chelate in said double stranded nucleic acid.
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Abstract
A method for the detection of a nucleotide sequence of a nucleic acid in a sample. The method comprises the steps: (i) contacting under hybridization condition the single stranded form of the nucleotide sequence with a single stranded nucleic acid probe, in which plurality of rare earth metal chelate groups is covalently linked via a water-soluble polymer of non-nucleic acid structure to a nucleotide acid that as one of its strand has the nucleotide sequence to be detected and as the other strand the nucleotide sequence of the probe, and (ii) detecting the formation of double stranded nucleic acid. The plurality of rare earth metal chelate groups have at least one metal ion selected from the group consisting of Eu3+, Sm3+, Tb3+ and Dy3+ as the chelated rare earth metal. The probes as given above are also claimed.
47 Citations
9 Claims
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1. A hybridization assay method for the detection of a nucleotide sequence of a nucleic acid in a sample, said method comprising the steps:
- (i) contacting under hybridization conditions the single stranded form of the sample nucleotide sequence with a single stranded nucleic acid probe, wherein;
a) said probe has a nucleotide sequence complementary to the sequence to be detected, b) said probe has a water-soluble polymer bearing a plurality of chelating structures covalently linked to said polymer, wherein said water-soluble polymer is of non-nucleic acid structure and is covalently linked to said nucleotide sequence complementary to the sequence to be detected, and c) said probe has a plurality of rare earth metal ions that together with said chelating structures forms a plurality of chelate groups covalently bound to said water-soluble polymer, and said rare earth metal is selected from the group consisting of Eu3+, Tb3+, Sm3+, and Dy3+, wherein said probe and covalently bound chelate groups are stable under hybridization assay conditions; (ii) allowing a nucleotide sequence to be detected in said sample and the nucleotide sequence of said probe to form a double stranded nucleic acid; and (iii) detecting the formation of double stranded nucleic acid containing said probe by measuring the time-resolved fluorescence from the rare earth metal ions incorporated as a chelate in said double stranded nucleic acid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- (i) contacting under hybridization conditions the single stranded form of the sample nucleotide sequence with a single stranded nucleic acid probe, wherein;
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9. Nucleotide sequence to which a plurality of lanthanide chelate groups are bound covalently via a water-soluble polymer, said lanthanide being non-radioactive and selected from a group consisting of Dy3+, Sm3+, Eu3+ and Tb3+, preferably from group Eu3+ and Tb3+.
Specification