Competitive immunoassay device
First Claim
1. A competitive immunoassay device comprising:
- (a) a first opposable component including;
(i) a sample preparation zone including a labeled specific binding partner for an analyte conjugated to a first member of an auxiliary specific binding pair in resolubilizable form; and
(ii) an absorber for absorbing fluid therein separated from the sample preparation zone on the first opposable component; and
(b) a second opposable component hingedly attached to the first opposable component including;
(i) a first chromatographic medium having first and second ends and including thereon;
(A) a first zone of immobilized analyte or analog thereof located closer to the first end of the chromatographic medium than to the second end of the chromatographic medium; and
(B) a second zone of an immobilized molecule which is a second member of the auxiliary specific binding pair with specific affinity for the first member located closer to the second end of the first chromatographic medium than to the first end of the first chromatographic medium;
(ii) a second chromatographic medium having a first end and a second end and including thereon a comparison zone containing a known quantity of the analyte or analog thereof immobilized to the comparison zone, the second chromatographic medium being separated from the first chromatographic medium on the first opposable component; and
(iii) a comparison label zone distinct from the comparison zone and separated from the first and second chromatographic medium including therein a labeled specific binding partner to the analyte or analog thereof in resolubilizable form in operable contact with the second chromatographic medium;
wherein when the first and second opposable components are brought into opposition from a position in which they are not in opposition, the sample preparation zone comes into operable contact with the first end of the first chromatographic medium to apply the sample and the labeled specific binding partner for the analyte conjugated to the first member of the auxiliary specific binding pair to the first chromatographic medium, and the absorber comes into operable contact with the second end of the first chromatographic medium and the second end of the second chromatographic medium to draw fluid through the first and second chromatographic medium from their first end to their second end so that the device gives a detectable comparative indication of the presence of an analyte.
1 Assignment
0 Petitions
Accused Products
Abstract
A chromatographic assay device for detection and/or determination of an analyte in a competitive immunoassay gives a semiquantitative or quantitative indication of analyte concentration in a single assay device while also giving a positive indication that flow has occurred properly through the device. In one form, the device comprises: (1) a first opposable component including a sample preparation zone and an absorber; and (2) a second opposable component including a first chromatographic medium with capture and detection zones, a second chromatographic medium with a comparison zone, and a comparison label. In another form, the second opposable component includes one chromatographic medium with capture, detection, and control zones. Test kits incorporating the devices and methods for their use are also disclosed.
-
Citations
28 Claims
-
1. A competitive immunoassay device comprising:
-
(a) a first opposable component including; (i) a sample preparation zone including a labeled specific binding partner for an analyte conjugated to a first member of an auxiliary specific binding pair in resolubilizable form; and (ii) an absorber for absorbing fluid therein separated from the sample preparation zone on the first opposable component; and (b) a second opposable component hingedly attached to the first opposable component including; (i) a first chromatographic medium having first and second ends and including thereon; (A) a first zone of immobilized analyte or analog thereof located closer to the first end of the chromatographic medium than to the second end of the chromatographic medium; and (B) a second zone of an immobilized molecule which is a second member of the auxiliary specific binding pair with specific affinity for the first member located closer to the second end of the first chromatographic medium than to the first end of the first chromatographic medium; (ii) a second chromatographic medium having a first end and a second end and including thereon a comparison zone containing a known quantity of the analyte or analog thereof immobilized to the comparison zone, the second chromatographic medium being separated from the first chromatographic medium on the first opposable component; and (iii) a comparison label zone distinct from the comparison zone and separated from the first and second chromatographic medium including therein a labeled specific binding partner to the analyte or analog thereof in resolubilizable form in operable contact with the second chromatographic medium; wherein when the first and second opposable components are brought into opposition from a position in which they are not in opposition, the sample preparation zone comes into operable contact with the first end of the first chromatographic medium to apply the sample and the labeled specific binding partner for the analyte conjugated to the first member of the auxiliary specific binding pair to the first chromatographic medium, and the absorber comes into operable contact with the second end of the first chromatographic medium and the second end of the second chromatographic medium to draw fluid through the first and second chromatographic medium from their first end to their second end so that the device gives a detectable comparative indication of the presence of an analyte. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A competitive immunoassay device comprising:
-
(a) a first opposable component including; (i) a sample preparation zone including; (A) a labeled specific binding partner for an analyte conjugated to a first member of an auxiliary specific binding pair in resolubilizable form; and (B) a predetermined quantity of the analyte or an analog thereof covalently bound to a labeled specific binding partner for a molecule that does not cross-react with the analyte in resolubilizable form; and (ii) an absorber separated from the sample preparation zone; and (b) a second opposable component including a chromatographic medium with first and second ends, the chromatographic medium including thereon in discrete, nonoverlapping zones; (i) a first capture zone of immobilized analyte or analog thereof; (ii) a second detection zone, including an immobilized molecule that is a second member of the auxiliary specific binding pair with specific affinity for the first member; and (iii) a third control zone, including an immobilized molecule capable of being specifically bound to the labeled specific binding partner covalently conjugated to the analyte or analog thereof located in the sample preparation zone on the first opposable component, the first, capture zone being located closer to the first end of the chromatographic medium than to the second end of the chromatographic medium, the third, control zone being located closer to the second end of the chromatographic medium than to the first end of the chromatographic medium, and the second, detection zone being located between the first capture zone and the third control zone; wherein the first and second opposable components are configured so that bringing the first and second opposable components into opposition from a position in which they are not in opposition causes the absorber to come into operable contact with the second end of the chromatographic medium and causes the sample preparation zone to come into contact with the first end of the chromatographic medium so that the test sample, the resolubilized labeled specific binding partner for the analyte conjugated to the first member of the auxiliary specific binding pair, and the predetermined quantity of the analyte or analog thereof covalently bound to the labeled specific binding partner flow through the chromatographic medium from the first end to the second end so that the device gives a detectable comparative indication of the presence of the analyte. - View Dependent Claims (12, 13, 14, 15, 16, 17)
-
-
18. A competitive immunoassay device comprising:
-
(a) a first opposable component including; (i) a plurality of sample preparation zones, each sample preparation zone including a labeled specific binding partner for an analyte conjugated to a first member of an auxiliary specific binding pair in resolubilizable form; and (ii) an absorber for absorbing fluid therein separated from the sample preparation zones on the first opposable component; and (b) a second opposable component hingedly attachable to the first opposable component including; (i) a plurality of first chromatographic media, one for each sample preparation zone, each first chromatographic medium having first and second ends and including thereon; (A) a first zone of an immobilized analyte or analog thereof located closer to the first end of the first chromatographic medium than to the second end of the first chromatographic medium; (B) a second zone of an immobilized molecule that is a second member of the auxiliary specific binding pair with specific affinity for the first member located closer to the second end of the first chromatographic medium than to the first end of the first chromatographic medium; (ii) a plurality of second chromatographic media, separated from the first chromatographic media on the second opposable component, one for each sample preparation zone, each second chromatographic medium having a first end and a second end and including thereon a comparison zone containing a known quantity of an analyte or analog thereof immobilized to the comparison zone; and (iii) a plurality of comparison labeled zones, distinct from the comparison zones and separated from the first and second chromatographic media, one for each second chromatographic medium, each comparison labeled zone including therein a labeled specific binding partner to the analyte or analog thereof in resolubilizable form in operable contact with the second chromatographic medium; wherein, when the first and second opposable components are brought into opposition from a position in which they are not in opposition, the sample preparation zones come into operable contact with the first end of each first chromatographic medium to apply the sample and the labeled specific binding partner for the analyte conjugated to the first member of the auxiliary specific binding pair to each first chromatographic medium, and the absorber comes into operable contact with the second end of each first chromatographic medium and the second end of each second chromatographic medium to draw fluid through the first and second chromatographic media from their first ends to their second ends so that the device gives a detectable comparative indication of the presence of an analyte in at least one first and second chromatographic medium. - View Dependent Claims (19, 20, 21, 22, 23)
-
-
24. A competitive immunoassay device comprising:
-
(a) a first opposable component including; (i) a plurality of sample preparation zones, each sample preparation zone including; (A) a labeled specific binding partner for an analyte conjugated to a first member of an auxiliary specific binding pair in resolubilizable form; and (B) a predetermined quantity of an analyte or analog thereof covalently bound to a labeled specific binding partner for a molecule that does not cross-react with the analyte in resolubilizable form; and (ii) an absorber separated from the sample preparation zone; and (b) a second opposable component including a plurality of chromatographic media each with first and second ends, each chromatographic medium including thereon in discrete, nonoverlapping zones; (i) a first capture zone of immobilized analyte or analog thereof; (ii) a second detection zone, including an immobilized molecule that is a second member of the auxiliary specific binding pair with specific affinity for the first member; and
(iii) a third control zone including an immobilized molecule capable of being specifically bound to the labeled specific binding partner covalently conjugated to the analyte or analog thereof, the first capture zone being located closer to the first end of the chromatographic medium than to the second end of the chromatographic medium, the third, control zone, being located closer to the second end of the chromatographic medium than to the first end of the chromatographic medium, and the second detection zone being located between the first and third zones;wherein the first and second opposable components are configured so that bringing the first and second opposable components into opposition from a position in which they are not in opposition causes the absorber to come into operable contact with the second end of each chromatographic medium and causes the sample preparation zones to come into contact with the first end of each chromatographic medium so that the test samples, the resolubilized labeled specific binding partners for the analyte conjugated to the first member of the auxiliary specific binding pair, and the predetermined quantities of the analyte or analog thereof covalently bound to a labeled specific binding partner flow through each chromatographic medium from the first end to the second end so that the device gives a detectable comparative indication of the presence of an analyte in at least one chromatographic medium. - View Dependent Claims (25, 26, 27, 28)
-
Specification