Reagent and method for the detection of a nucleotide sequence with signal amplification
First Claim
1. A kit for detecting at least one nucleic acid sequence of interest, with signal amplification, said kit having in suitable containers:
- a reagent; and
a single species of tracer-labelled oligonucleotide probe reactive with said reagent;
wherein said reagent comprises at least one linear backbone polymer molecule having a backbone chain formed by carbon-to-carbon covalent bonds, said at least one polymer molecule including at least one monomeric unit having a lateral substituent, said lateral substituent comprising an oligonucleotide unit that hybridizes with said sequence of interest and with said probe, said reagent being soluble in aqueous media and said at least one polymer molecule including at least two said oligonucleotide units per said polymer molecule.
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Abstract
Methods for the detection of a nucleotide sequence of interest comprising at least one nucleotide probe marked with a tracer. The methods include a reagent essentially comprising a linear backbone copolymer having lateral substituents, whose chain consists of a first type of repetitive unit and at least one other type of repetitive unit, in which at least one part of the units of the first type have a lateral substituent comprising a nucleotide unit, such a lateral substituent not being present on the other types of units. Each of said nucleotide units, all of which are identical, comprise at least one nucleotide sequence capable of hybridizing with said sequence of interest and nucleotide sequence capable of hybridizing with a probe, the reagent containing on average more than two of said nucleotide units, in molar equivalents, per mole of polymer. Such a reagent enables signal amplification to be obtained, and therefor lowers the sensitivity threshold. Application, in particular, in the production of tests for the detection of pathogenic organisms, or in the diagnosis of genetic diseases.
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Citations
27 Claims
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1. A kit for detecting at least one nucleic acid sequence of interest, with signal amplification, said kit having in suitable containers:
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a reagent; and a single species of tracer-labelled oligonucleotide probe reactive with said reagent; wherein said reagent comprises at least one linear backbone polymer molecule having a backbone chain formed by carbon-to-carbon covalent bonds, said at least one polymer molecule including at least one monomeric unit having a lateral substituent, said lateral substituent comprising an oligonucleotide unit that hybridizes with said sequence of interest and with said probe, said reagent being soluble in aqueous media and said at least one polymer molecule including at least two said oligonucleotide units per said polymer molecule. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A kit for detecting at least one nucleic acid sequence of interest, with signal amplification, said kit having in suitable containers:
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a reagent; and a single species of tracer-labelled oligonucleotide probe reactive with said reagent; wherein said reagent comprises at least one linear backbone copolymer molecule having a backbone chain formed by carbon-to-carbon covalent bonds, said at least one copolymer molecule comprising a first type of monomeric unit and a second type of monomeric unit, wherein at least one of said first type of monomeric unit carries a lateral substituent, said lateral substituent comprising an oligonucleotide unit that hybridizes with said sequence of interest and with said probe, said reagent being soluble in aqueous media and said at least one copolymer molecule including at least two said oligonucleotide units per said copolymer molecule. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification