Dual bead assays including optical biodiscs and methods relating thereto
First Claim
1. A method for identifying whether a target agent is present in a biological sample comprising:
- mixing capture beads, each having at least one transport probe affixed thereto, reporter beads, each having at least one signal probe affixed thereto, and a biological sample, under binding conditions so as to permit formation of a dual bead complex if the target agent is present in the sample, the reporter bead and capture bead each being bound to the target agent;
isolating the dual bead complex from the mixture to obtain an isolate;
exposing the isolate to a capture field on a disc, the capture field having a capture agent that binds to the dual bead complex; and
detecting the presence of the dual bead complex in the disc to indicate that the target agent is present in the sample.
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Accused Products
Abstract
A method for determining whether a target agent is present in a biological sample includes mixing magnetic capture beads, each having at least one transport probe affixed thereto, reporter beads, each bead having at least one signal probe affixed thereto, and a biological sample, under binding conditions which permit formation of a dual bead complex if the target agent is present in the sample, wherein the dual bead complex comprises the reporter bead bound to the target agent which is in turn bound to the magnetic capture bead; isolating the dual bead complex from the mixture by subjecting the mixture to a magnetic field; loading the isolate into an optical disc, the optical disc having an capture layer having affixed thereto, within a capture field, a capture agent that binds to the dual bead complex specifically; and detecting the presence of the dual bead complex in the optical disc, the presence of the dual bead complex indicating that the target agent is present in the sample.
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Citations
60 Claims
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1. A method for identifying whether a target agent is present in a biological sample comprising:
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mixing capture beads, each having at least one transport probe affixed thereto, reporter beads, each having at least one signal probe affixed thereto, and a biological sample, under binding conditions so as to permit formation of a dual bead complex if the target agent is present in the sample, the reporter bead and capture bead each being bound to the target agent;
isolating the dual bead complex from the mixture to obtain an isolate;
exposing the isolate to a capture field on a disc, the capture field having a capture agent that binds to the dual bead complex; and
detecting the presence of the dual bead complex in the disc to indicate that the target agent is present in the sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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29. A disc for detecting a target agent comprising:
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a substrate;
a capture layer associated with the substrate;
capture agent at the capture layer; and
a dual bead complex including a reporter bead with a transport probe bound to the target agent, a capture bead with a signal probe bound to the target agent, one of the transport probe and signal probe being bound to the capture agent.
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41. A disc system for detecting a target agent comprising:
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a biodisc having a first capture field and adapted to allow a first dual bead complex including a reporter bead with a transport probe bound to the target agent, and a capture bead with a signal probe bound to the target agent, to be bound to the capture field; and
a detection system including;
an energy source for directing energy to the capture field, and a detector for detecting energy to determine the presence of the dual bead complex in the capture field. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50)
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51. A disc comprising:
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a substrate;
a capture layer associated with the substrate and including a capture agent in a capture field; and
a mixing chamber within the disc and spaced from the capture field, the mixing chamber pre-loaded before receiving a sample with reporter beads with transport probes bound thereto and capture beads with signal probes bound thereto, the transport probes and signal probes each capable to binding with a target agent, the disc being adapted to receive a sample in the mixing chamber, to mix the sample with the reporter beads and capture beads to produce dual bead complex structures, and to provide the dual bead complex structures to the capture field. - View Dependent Claims (52, 53, 54)
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55. A biodisc system for detecting a target agent comprising:
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a biodisc having a first capture field and adapted to allow a first dual bead complex including a reporter bead with a transport probe bound to the target agent, and a capture bead with a signal probe bound to the target agent, to be bound to the capture field, wherein the capture field includes regions on the disc that can be made magnetic; and
a drive system including a write head for forming magnetic regions on the disc for capturing dual bead complexes. - View Dependent Claims (56, 57, 59, 60)
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58. A method including using a disc drive write head to form magnetic regions in a biodisc, introducing a magnetic beads bound to a biological sample so that it magnetically binds to the magnetic region, and detecting the sample bound to the bead.
Specification