Carrier bound immunosorbent
First Claim
1. A carrier-bound immunosorbent comprising a solid carrier body carrying an immobilized immuno-reactant, wherein the immunoreactant, being either an antigen or an antibody, is covalently bonded to a crosslinked proteinaceous film enveloping the carrier body in such a manner that immunologically active parts of the immunoreactant are present on its surface in a form in which they are available for immunosorption, wherein said film consists essentially of protein, partially hydrolysed protein, peptide or a combination thereof, crosslinked in situ with a crosslinking agent on the surface of the carrier body into a coherent film enveloping the surface and clinging thereto.
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Accused Products
Abstract
The invention provides an immuno-reactant, being either an antigen or an antibody covalently bonded to a cross-linked film, more particularly composed of cross-linked protein or peptides, enveloping a carrier body, e.g. a solid, non-porous glass bead of 6 mm diameter. The immuno-logically active parts of the immuno-reactant are present on the surface in a form in which they are available for immunosorption. If the immuno-reactant is a protein, e.g. an antibody, it can provide all or part of the film-forming material. In a particular embodiment the film carries antibodies against a second type of antibody which is captured immunosorptively to form a "double layer" carrier-bound immunosorbent, the antigen capturing sites of the second type of antibody providing the immunosorption sites of the product. The immunosorbents are used, for example, for RIA or ELISA assays.
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Citations
50 Claims
- 1. A carrier-bound immunosorbent comprising a solid carrier body carrying an immobilized immuno-reactant, wherein the immunoreactant, being either an antigen or an antibody, is covalently bonded to a crosslinked proteinaceous film enveloping the carrier body in such a manner that immunologically active parts of the immunoreactant are present on its surface in a form in which they are available for immunosorption, wherein said film consists essentially of protein, partially hydrolysed protein, peptide or a combination thereof, crosslinked in situ with a crosslinking agent on the surface of the carrier body into a coherent film enveloping the surface and clinging thereto.
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12. In a carrier-bound immunosorbent comprising a carrier body carrying an immobilized immunoreactant, the improvement wherein at least the surface of the carrier body is non-porous;
- wherein a film coated thereon on the surface of the carrier carries covalently bonded thereto a first immunoreactant being one member of an antigen/antibody pair, the first immunoreactant holding by antigen/antibody interaction the second member of the pair, this second member projecting from the surface of said immunosorbent with a region thereof which itself in turn has a desired immunoreactivity for entering into an immunosorbent reaction with a third immunoreactant; and
wherein the first immunoreactant forms a covalently bonded part of a film consisting essentially of protein, partially hydrolysed protein, peptide, or a combination thereof, crosslinked in situ with a crosslinking agent on the surface of the carrier body into a coherent film clinging to said surface. - View Dependent Claims (13)
- wherein a film coated thereon on the surface of the carrier carries covalently bonded thereto a first immunoreactant being one member of an antigen/antibody pair, the first immunoreactant holding by antigen/antibody interaction the second member of the pair, this second member projecting from the surface of said immunosorbent with a region thereof which itself in turn has a desired immunoreactivity for entering into an immunosorbent reaction with a third immunoreactant; and
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14. A carrier-bound immunosorbent which is specific to a specific antigen comprising a carrier body carrying an immobilised immuno reactant, comprising on a solid substrate a first layer including covalently bonded and cross-linked antibodies of a first species of animal elicited against antibodies of a second species of animal and a second layer immunosorbed on the first layer, of specific antibodies elicited against the specific antigen in the second species of animal;
- and wherein said solid substrate is non-porous, or said first layer covers the substrate substantially completely.
- View Dependent Claims (15, 16, 17)
- 20. A process for preparing a carrier-bound immunosorbent, which comprises applying a film of cross-linkable protein, partially hydrolysed protein, or peptide material to the surface of a solid carrier body to envelop the body, including a desired immunoreactant incorporated in or on the surface of the film, and crosslinking the film in situ while on the surface of the carrier body, the crosslinked film thereby formed clinging to the carrier surface, and covalently bonding the immunoreactant to the film.
- 40. In a carrier-bound immunosorbent comprising a carrier body carrying an immobilised immuno reactant, the improvement wherein the surface of the carrier body or a film coated thereon carries covalently bonded thereto a double layer comprising a first layer of a first immuno reactant being one member of an antigen/antibody pair, the first layer holding by antigen/antibody interaction a second layer comprising the second member of the pair, this second layer in turn carrying on its surface in a form available for immunosorption molecular regions having a desired immuno reactivity for entering into an immunosorbent reaction with a third immuno reactant, at least one of the members of the pair being IgY.
- 42. A carrier-bound immunosorbent which is specific to a specific antigen, comprising a solid carrier surface carrying an immobilised immuno reactant, the immuno reactant being present in a double layer composed of a first layer comprising IgG specific against IgY and a second layer immunosorbed by the IgG comprising IgY which in turn is specific to the specific antigen.
- 45. A carrier-bound immunosorbent of high specificity, comprising a carrier body having a solid surface carrying a permanently adhering layer of protein, partially hydrolysed protein, peptide or a combination thereof, the layer comprising a covalently bonded and thereby immobilized immunoreactant, being either an antigen or an antibody, in such a manner that immunologically active parts of the immunoreactant are present exposed in a form in which they are available for immunosorption, and being essentially free of accessible pores and other nonspecific adsorption sites.
Specification