Tsh immunoassays and processes for performing tsh immunoassays in the presence of endogenous contaminants in restricted wash formats
AssigneeAbbott Point of Care Inc.
InventorsDan Wang, Gordon Bruce Collier, Joseph P. Skinner, Qiaoqiao Ruan, Sergey Y. Tetin
Life of this patent
Estimating the term…
Abstract
The invention relates to low wash Thyroid Stimulating Hormone (TSH) immunoassays using an ELISA sandwich assay having limited or no wash step between the antigen capture, detection antibody addition and substrate introduction steps. This invention exhibits low cross reactivity with biologically similar interfering cross reacting species, such as Follicle Stimulating Hormone (FSH), Luteinizing Hormone (LH) and Chorionic Gonadotropin (CG).
Claims12
A thyroid stimulating hormone (TSH) sandwich immunoassay, comprising at least two epitope-compatible antibodies comprising at least one capture antibody and at least one signal antibody, wherein the dissociation constant (Kd) of both antibodies for TSH is between 0.08 and 0.1 nM, and wherein the capture antibody Kd for follicle stimulating hormone (FSH), luteinizing hormone (LH) and chorionic gonadotropin (CG) is substantially 1000 nM, 1000 nM, and 500 nM, respectively, and wherein the immunoassay uses a single wash step.
A thyroid stimulating hormone (TSH) sandwich immunoassay, comprising at least two epitope-compatible antibodies comprising at least one capture antibody and at least one signal antibody, wherein the dissociation constant (Kd) of both antibodies for TSH is between 0.04 and 0.1 nM, and wherein the capture antibody Kd for follicle stimulating hormone (FSH), luteinizing hormone (LH) and chorionic gonadotropin (CG) is substantially 1000 nM, 1000 nM, and 500 nM, respectively, and wherein the immunoassay uses a single wash step.
Dependencies are inferred from the claim text.