Biosensor, device and method for detecting nucleic acids by means of at least two units for immobilizing nucleic acids
First Claim
1. A method for detecting nucleic acids by means of at least two nucleic acid immobilization units, in which the at least two nucleic acid immobilization units are electrically conductive and electrically insulated from one another, in which the at least two nucleic acid immobilization units are provided with first nucleic acid molecules acting as scavenger molecules, the first nucleic acid molecules being present as single-stranded molecules and being capable of binding second nucleic acid molecules to be detected, and the first single-stranded nucleic acid molecules acting as scavenger molecules being provided with a redox-active label which can generate a detectable signal, in which a sample to be studied is brought in contact with the at least two nucleic acid immobilization units, wherein the sample to be studied may contain the second nucleic acid molecules to be detected, in which second nucleic acid molecules contained in the sample to be studied become bound to the scavenger molecules, so that double-stranded hybrid molecules are formed, in which the second nucleic acid molecules are detected by means of a signal caused by the redox-active label, by using an electrical detection circuit integrated in a semiconductor chip, and in which an immobilization unit is selected for individual detection of the signal.
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Accused Products
Abstract
A device and method for detecting nucleic acids. The device having a biosensor with at least two nucleic acid immobilization units and an electrical detection circuit. In the biosensor, the at least two nucleic acid immobilization units are in this case electrically conductive and electrically insulated from one another. The at least two nucleic acid immobilization units are provided with first nucleic acid molecules acting as scavenger molecules. The first nucleic acid molecules are present as single-stranded molecules and can bind second nucleic acid molecules to be detected. The first single-stranded nucleic acid molecules acting as scavenger molecules are provided with a redox-active label capable of generating a detectable signal. The electrical detection circuit is configured in such a way that it detects the hybridization even of the nucleic acid molecules with the scavenger molecules by means of the label.
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Citations
22 Claims
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1. A method for detecting nucleic acids by means of at least two nucleic acid immobilization units,
in which the at least two nucleic acid immobilization units are electrically conductive and electrically insulated from one another, in which the at least two nucleic acid immobilization units are provided with first nucleic acid molecules acting as scavenger molecules, the first nucleic acid molecules being present as single-stranded molecules and being capable of binding second nucleic acid molecules to be detected, and the first single-stranded nucleic acid molecules acting as scavenger molecules being provided with a redox-active label which can generate a detectable signal, in which a sample to be studied is brought in contact with the at least two nucleic acid immobilization units, wherein the sample to be studied may contain the second nucleic acid molecules to be detected, in which second nucleic acid molecules contained in the sample to be studied become bound to the scavenger molecules, so that double-stranded hybrid molecules are formed, in which the second nucleic acid molecules are detected by means of a signal caused by the redox-active label, by using an electrical detection circuit integrated in a semiconductor chip, and in which an immobilization unit is selected for individual detection of the signal.
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14. A biosensor for detecting nucleic acids with at least two nucleic acid immobilization units and with an electrical detection circuit,
in which the at least two nucleic acid immobilization units are electrically conductive and electrically insulated from one another, in which the at least two nucleic acid immobilization units are provided with first nucleic acid molecules acting as scavenger molecules, the first nucleic acid molecules being present as single-stranded molecules and being capable of binding second nucleic acid molecules to be detected, and the first single-stranded nucleic acid molecules acting as scavenger molecules being provided with a redox-active label which can generate a detectable signal, and in which the electrical detection circuit is configured in such a way that the detection circuit detects nucleic acid molecules, which have bound to the scavenger molecules, by means of the label, and in which the electrical detection circuit has selection electronics for individual selection of at least one immobilization unit, and in which the electrical detection circuit is integrated in a semiconductor chip.
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22. A device for detecting nucleic acids with a biosensor, which has at least two nucleic acid immobilization units and an electrical detection circuit, in the biosensor:
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the at least two nucleic acid immobilization units being electrically conductive and electrically insulated from one another, the at least two nucleic acid immobilization units being provided with first nucleic acid molecules acting as scavenger molecules, the first nucleic acid molecules being present as single-stranded molecules and being capable of binding second nucleic acid molecules to be detected, and the first single-stranded nucleic acid molecules acting as scavenger molecules being provided with a redox-active label which can generate an electrochemically detectable signal, and the electrical detection circuit being configured in such a way that the detection circuit detects nucleic acid molecules, which have bound to the scavenger molecules, by means of the label, and in which the electrical detection circuit has selection electronics for individual selection of at least one immobilization unit, and in which the electrical detection circuit is integrated in a semiconductor chip.
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Specification