Compositions and methods for determining successful immunization by one or more vaccines
First Claim
1. A testing method for presence of antibodies to an antigen from a host, comprising:
- (a) providing;
(1) a reactant layer, into which are absorbed a ternary complex comprising;
the antigen,a host antibody binding agent comprising at least one of an anti-host immunoglobulin IgM antibody and an anti-host immunoglobulin IgG antibody, bound to a ligand, anda detector comprising a non-host anti-antigen IgG antibody conjugated to colloidal particles;
(2) a test strip, in fluid communication with the reactant layer at a portion thereof, to which is immobilized;
a ligand binding agent at a test area; and
an anti-non-host IgG antibody immobilized at a control area,the test area being spaced more proximate to the reactant layer than the control area; and
(3) a sample well,(b) placing a serum specimen from a host in the sample well;
(c) selectively forming a quaternary complex of;
host antigen-specific antibody in the serum specimen;
the detector;
the antigen; and
the host antibody binding agent;
(d) capturing the quaternary complex which migrates through the test strip using the immobilized ligand binding agent at the test area; and
(e) capturing the complex comprising the antigen and the detector, unbound to host antigen-specific antibodies, which migrates through the test strip past the test area, by using the immobilized anti-non-host IgG antibody,to thereby indicate a presence of the host antigen-specific antibodies by an indication at the test area and validity of the test by an indication at the control area.
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Abstract
A host antigen-specific antibody testing system and method. The a ternary complex of the antigen, a ligand-bound anti-host IgM, and a non-host anti-antigen IgG detector conjugate selectively form a quaternary complex with host antibodies, wherein the host antibodies and IgG compete for the antigen, and the anti-host IgM binds the host antibodies. The quaternary complex is retained by an immobilized IgM ligand binding agent, and any residual ternary complex is retained by a later encountered immobilized anti-non-host IgG. If sufficient host antibodies have a high affinity for the antigen, the complex is detected at the quaternary complex detection region based on the presence of the detector, and if there are insufficient high affinity host antibodies, the ternary complex migrates past the quaternary complex detection region and is retained and detected at a control region.
1137 Citations
20 Claims
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1. A testing method for presence of antibodies to an antigen from a host, comprising:
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(a) providing; (1) a reactant layer, into which are absorbed a ternary complex comprising; the antigen, a host antibody binding agent comprising at least one of an anti-host immunoglobulin IgM antibody and an anti-host immunoglobulin IgG antibody, bound to a ligand, and a detector comprising a non-host anti-antigen IgG antibody conjugated to colloidal particles; (2) a test strip, in fluid communication with the reactant layer at a portion thereof, to which is immobilized; a ligand binding agent at a test area; and an anti-non-host IgG antibody immobilized at a control area, the test area being spaced more proximate to the reactant layer than the control area; and (3) a sample well, (b) placing a serum specimen from a host in the sample well; (c) selectively forming a quaternary complex of; host antigen-specific antibody in the serum specimen; the detector; the antigen; and the host antibody binding agent; (d) capturing the quaternary complex which migrates through the test strip using the immobilized ligand binding agent at the test area; and (e) capturing the complex comprising the antigen and the detector, unbound to host antigen-specific antibodies, which migrates through the test strip past the test area, by using the immobilized anti-non-host IgG antibody, to thereby indicate a presence of the host antigen-specific antibodies by an indication at the test area and validity of the test by an indication at the control area. - View Dependent Claims (2)
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3. A testing method for presence of antibodies to a particular antigen from a host, comprising:
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providing a reactant layer, having the particular antigen, at least one of an anti-host immunoglobulin IgM antibody and an anti-host immunoglobulin IgG antibody bound to a ligand, and a non-host anti-antigen IgG antibody conjugated to a detector; forming a complex by adding serum containing host antibodies to the particular antigen, wherein the host antibodies and the non-host anti-antigen IgG antibody bind the particular antigen, and the at least one of an anti-host immunoglobulin IgM antibody and an anti-host immunoglobulin IgG antibody bound to a ligand binds the host antibodies; migrating the complex on a strip toward a first region having an immobilized ligand binding agent which binds and ceases migration of the at least one of an anti-host immunoglobulin IgM antibody and an anti-host immunoglobulin IgG antibody bound to a ligand and any complexes including the at least one of an anti-host immunoglobulin IgM antibody and an anti-host immunoglobulin IgG antibody bound to a ligand; migrating an unbound residual portion of the complex past the first region to a second region having immobilized anti-non-host IgG antibody immobilized at a control area, which binds the non-host anti-antigen IgG antibody and any complexes including the non-host anti-antigen IgG antibody, wherein, if the host antibodies have a sufficient affinity for the antigen and are present in sufficient quantity, a complex comprising the antigen, the host antibodies, and the at least one of an anti-host immunoglobulin IgM antibody and an anti-host immunoglobulin IgG antibody bound to a ligand and the non-host anti-antigen IgG antibody conjugated to the and detector are retained in the first region by the immobilized ligand binding agent for detection based on the presence of the detector, and if the host antibodies have insufficient affinity for the antigen or are not present in sufficient quantity, a complex comprising the antigen, and the non-host anti-antigen IgG antibody conjugated to the detector, will migrate past the first region and be retained at the second region by the immobilized anti-non-host IgG antibody for detection based on the presence of the detector. - View Dependent Claims (20)
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4. A testing method for presence of host antigen-specific antibodies to an antigen from a host, comprising:
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(a) providing; (1) a reactant layer, into which are absorbed the antigen, an anti-host immunoglobulin antibody bound to a ligand, and a detector comprising a non-host anti-antigen antibody conjugated to colloidal particles; (2) a test strip configured to permit migration of a fluid and to provide fluid communication with the reactant layer at a portion thereof, to which is immobilized a ligand binding agent at a test area and anti-non-host antibody immobilized at a control area, the test area being spaced more proximate to the reactant layer than the control area; and (3) a sample well in fluid communication with the test strip at a portion thereof, (b) placing a fluid serum specimen from a host in the sample well, and permitting the fluid serum specimen to migrate into and through the test strip; (c) permitting host antigen-specific antibodies in the fluid serum specimen to selectively form a quaternary host antigen-specific antibody/detector/antigen/anti-host immunoglobulin antibody complex with the detector, antigen, and anti-host immunoglobulin antibody; (d) capturing quaternary host antigen-specific antibody/detector/antigen/anti-host immunoglobulin antibody complex which migrates through the test strip using the immobilized ligand binding agent at the test area; and (e) capturing the detector and antigen, unbound to antigen-specific host antibodies, which migrates through the test strip past the test area using the immobilized anti-non-host antibody, to thereby indicate a presence of the host antigen-specific antibodies by an indication at the test area and validity of the test by an indication at the control area. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification