Cell, method and kit for conducting an assay for...

C - Chemistry – Metallurgy – 12 – Q

Patent

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Details

C12Q 1/68 (2006.01) C12N 5/10 (2006.01) C12N 15/63 (2006.01) C12N 15/85 (2006.01) C12Q 1/02 (2006.01) G01N 33/567 (2006.01)

Patent

CA 2749142

The present invention provides a cell for use in a one- step cell-based assay for an extracellular ligand (e.g., I FN.alpha.) that initiates a ligand-specific signal at the nucleus of the cell and for neutralizing antibodies against the extracellular ligand. The cell-based one-step assay allows both the extracellular ligand concentration and the neutralizing antibody titer to be quantified in a single sample (e.g., serum) without the need for sample dilution and addition of exogenous extracellular ligand.

L'invention fournit une cellule destinée à être utilisée dans un essai à base de cellules en une étape d'un ligand extracellulaire (par exemple, I FNa) qui déclenche un signal spécifique au ligand au niveau du noyau de la cellule et pour neutraliser des anticorps à l'encontre du ligand extracellulaire. L'essai en une étape à base de cellules permet de quantifier à la fois la concentration de ligand extracellulaire et le titre en anticorps neutralisant dans un échantillon unique (par exemple du sérum) sans avoir besoin de diluer l'échantillon et d'ajouter un ligand extracellulaire exogène.

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