Reporter cell assay-based functional quantification of TNF-α-antagonists in serum: a proof-of-principle study for adalimumab
Quantification of therapeutic antibodies is commonly based on physico-chemical assays such as enzyme-linked immunoabsorption assays (ELISA) and lately on mass spectrometry. However, the functional integrity of evaluated immunoglobulins is yet not assessed. Consequently, a commercially available repo...
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| Main Authors: | , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
26 February 2020
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| In: |
Analytical biochemistry
Year: 2020, Volume: 596 |
| ISSN: | 1096-0309 |
| DOI: | 10.1016/j.ab.2020.113646 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.ab.2020.113646 Verlag, lizenzpflichtig, Volltext: http://www.sciencedirect.com/science/article/pii/S0003269720301780 
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| Author Notes: | Lukas Schuster, Max Sauter, Philipp Uhl, Andreas Meid, Walter E. Haefeli, Johanna Weiss, Dirk Theile |
| Summary: | Quantification of therapeutic antibodies is commonly based on physico-chemical assays such as enzyme-linked immunoabsorption assays (ELISA) and lately on mass spectrometry. However, the functional integrity of evaluated immunoglobulins is yet not assessed. Consequently, a commercially available reporter cell line was used to quantify the functional concentration of the anti-tumor necrosis factor alpha (TNF-α) antibody adalimumab present in serum of a healthy beagle dog treated with 3 mg intravenous adalimumab (Humira®). HEK-Blue™-hTLR3 cells express a secreted alkaline phosphatase under the control of a nuclear factor kappa B (NF-κB) response element. Its enzymatic activity can be recorded using colorimetry, which reports activity of extracellular NF-κB stimuli such as TNF-α. Using an adalimumab concentration-response calibration curve, the functional concentration of serum adalimumab was estimated to be 4.9 ± 1.4 μg/ml, which was in excellent agreement with ELISA results (4.8 μg/ml). The obtained data suggest that this simple, easy-to-handle reporter cell assay can be used for the functional quantification of adalimumab present in samples from in vitro or pre-clinical in vivo experiments. Moreover, this assay could be used in vitro to compare the pharmacodynamics of adalimumab biosimilars or different anti-TNF-α compounds, respectively. |
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| Item Description: | Im Text wird alpha als griechisches Zeichen dargestellt Gesehen am 24.04.2020 |
| Physical Description: | Online Resource |
| ISSN: | 1096-0309 |
| DOI: | 10.1016/j.ab.2020.113646 |