Assessing agonistic potential of a candidate therapeutic anti-IL21R antibody.

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Assessing agonistic potential of a candidate therapeutic anti-IL21R antibody.

Guo, Y., Hill, A.A., Ramsey, R.C., Immermann, F.W., Corcoran, C., Young, D., Lavallie, E.R., Ryan, M., Bouchard, T., Pfeifer, R., Warner, G., Bologna, M., Bloom, L., O'Toole, M.

Journal		J Transl Med.
Species
Analytes Measured		IL-10 , IL-12 p70 , IL-13 , IL-2 , IL-4 , IL-5 , IL-6 , IL-8 , MCP-1
Matrix Tested		Peripheral blood mononuclear cell (PBMC) culture supernatants

Year		2010
Volume		8
Page Numbers
Application		Cytokines and Chemokines

Abstract

BACKGROUND: Selective neutralization of the IL21/IL21R signaling pathway is a promising approach for the treatment of a variety of autoimmune diseases. Ab-01 is a human neutralizing anti-IL21R antibody. In order to ensure that the activities of Ab-01 are restricted to neutralization even under in vitro cross-linking and in vivo conditions, a comprehensive assessment of agonistic potential of Ab-01 was undertaken.

METHODS: In vitro antibody cross-linking and cell culture protocols reported for studies with a human agonistic antibody, TGN1412, were followed for Ab-01. rhIL21, the agonist ligand of the targeted receptor, and cross-linked anti-CD28 were used as positive controls for signal transduction. In vivo agonistic potential of Ab-01 was assessed by measuring expression levels of cytokine storm-associated and IL21 pathway genes in blood of cynomolgus monkeys before and after IV administration of Ab-01.

RESULTS: Using a comprehensive set of assays that detected multiple activation signals in the presence of the positive control agonists, in vitro Ab-01-dependent activation was not detected in either PBMCs or the rhIL21-responsive cell line Daudi. Furthermore, no difference in gene expression levels was detected in blood before and after in vivo Ab-01 dosing of cynomolgus monkeys.

CONCLUSIONS: Despite efforts to intentionally force an agonistic signal from Ab-01, none could be detected.

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U-PLEX Human IL-2 384-Well Assay IL-2 \| Human Singleplex
U-PLEX Custom Metabolic Group 1 (human) 384-well Assays BAFF, BDNF, β-NGF, C-Peptide, CTACK, ENA-78, Eotaxin, Eotaxin-2, Eotaxin-3, EPO, FGF-21, FGF-23, FLT3L, Fractalkine, FSH, G-CSF, Ghrelin (active), Ghrelin (total), GIP (active), GIP (inactive), GIP (total), GLP-1 (active), GLP-1 (inactive), GLP-1 (total), Glucagon, GM-CSF, GRO-α, I-309, IFN-α2a, IFN-β, IFN-γ, IL-1α, IL-1β, IL-1RA, IL-2, IL-2Rα, IL-3, IL-4, IL-5, IL-6, IL-7, IL-8, IL-9, IL-10, IL-12/IL-23p40, IL-12p70, IL-13, IL-15, IL-16, IL-17A, IL-17A/F, IL-17C, IL-17D, IL-17E/IL-25, IL-17F, IL-18, IL-21, IL-22, IL-23, IL-27, IL-29/IFN-λ1, IL-31, IL-33, Insulin, IP-10, Leptin, Luteinizing Hormone (LH), MCP-1, MCP-2, MCP-4, M-CSF, MDC, MIF, MIP-1α, MIP-5, PP, Proinsulin, PYY (total), SDF-1α, TARC, TNF-α, TNF-β, TPO, TRAIL, TSLP, VEGF-A, YKL-40 \| Human Multiplex
U-PLEX Custom Biomarker Group 1 (human) 384-well Assays CTACK, ENA-78, Eotaxin, Eotaxin-2, Eotaxin-3, EPO, FLT3L, Fractalkine, G-CSF, GM-CSF, GRO-α, I-309, IFN-α2a, IFN-β, IFN-γ, IL-1α, IL-1β, IL-1RA, IL-2, IL-2Rα, IL-3, IL-4, IL-5, IL-6, IL-7, IL-8, IL-9, IL-10, IL-12/IL-23p40, IL-12p70, IL-13, IL-15, IL-16, IL-17A, IL-17A/F, IL-17B, IL-17C, IL-17D, IL-17E/IL-25, IL-17F, IL-18, IL-21, IL-22, IL-23, IL-27, IL-29/IFN-λ1, IL-31, IL-33, IP-10, I-TAC, MCP-1, MCP-2, MCP-3, MCP-4, M-CSF, MDC, MIF, MIP-1α, MIP-1β, MIP-3α, MIP-3β, MIP-5, SDF-1α, TARC, TNF-α, TNF-β, TPO, TRAIL, TSLP, VEGF-A, YKL-40 \| Human Multiplex
S-PLEX Proinflammatory Panel 1 (human) Kit IFN-γ, IL-1β, IL-2, IL-4, IL-6, IL-10, IL-12p70, IL-17A, TNF-α \| Human Multiplex
U-PLEX Macrophage M2 Combo 1 (mouse) IL-4, IL-10, IL-13, MDC, TARC \| Mouse Multiplex
S-PLEX Human IL-13 Kit IL-13 \| Human Singleplex
S-PLEX NHP IL-2 Kit IL-2 \| Non-human primate Singleplex
S-PLEX NHP IL-6 Kit IL-6 \| Non-human primate Singleplex
S-PLEX NHP IL-5 Kit IL-5 \| Non-human primate Singleplex
S-PLEX Human IL-6 Kit IL-6 \| Human Singleplex
S-PLEX Human IL-10 Kit IL-10 \| Human Singleplex
S-PLEX Human IL-4 Kit IL-4 \| Human Singleplex
S-PLEX Human IL-2 Kit IL-2 \| Human Singleplex
S-PLEX Human IL-12p70 Kit IL-12p70 \| Human Singleplex
S-PLEX Human IL-5 Kit IL-5 \| Human Singleplex
U-PLEX CAR-T Cell Combo 1 (human) GM-CSF, Granzyme A, Granzyme B, IFN-γ, IL-2, TNF-α \| Human Multiplex
U-PLEX Macrophage M2 Combo 1 (human) Eotaxin-2, IL-4, IL-10, IL-13, M-CSF, MDC, TARC \| Human Multiplex
U-PLEX Macrophage M1 Combo 1 (human) IL-1β, IL-6, IL-12p70, IL-18, IL-23, IP-10, MCP-1, MIP-1α, TNF-α \| Human Multiplex
V-PLEX Plus Viral Panel 3 NHP Kit IFN-γ, IL-1β, IL-5, IL-6, IL-8, IL-10 \| Non-human primate Multiplex
V-PLEX Plus Viral Panel 3 Human Kit IFN-γ, IL-1β, IL-4, IL-5, IL-6, IL-8, IL-10, IL-12p70, TNF-α \| Human Multiplex
V-PLEX Viral Panel 3 NHP Kit IFN-γ, IL-1β, IL-5, IL-6, IL-8, IL-10 \| Non-human primate Multiplex
V-PLEX Viral Panel 3 Human Kit IFN-γ, IL-1β, IL-4, IL-5, IL-6, IL-8, IL-10, IL-12p70, TNF-α \| Human Multiplex
U-PLEX Viral Combo 1 (NHP) G-CSF, GM-CSF, IFN-α2a, IFN-γ, IL-1β, IL-1RA, IL-4, IL-5, IL-6, IL-7, IL-8, IL-9, IL-10, IL-12p70, IP-10, MCP-1, MIP-1α, TNF-α, VEGF-A \| Non-human primate Multiplex
U-PLEX Viral Combo 1 (human) G-CSF, GM-CSF, IFN-α2a, IFN-β, IFN-γ, IL-1β, IL-1RA, IL-4, IL-5, IL-6, IL-7, IL-8, IL-9, IL-10, IL-12p70, IP-10, MCP-1, MIP-1α, TNF-α, VEGF-A \| Human Multiplex
V-PLEX Viral Panel 2 NHP Kit IFN-γ, IL-1β, IL-6, IL-8, IL-10 \| Non-human primate Multiplex
V-PLEX Viral Panel 2 Human Kit IFN-γ, IL-1β, IL-4, IL-6, IL-8, IL-10, TNF-α \| Human Multiplex
V-PLEX Viral Panel 1 NHP Kit IL-1β, IL-6, IL-8 \| Non-human primate Multiplex
V-PLEX Viral Panel 1 Human Kit IL-1β, IL-6, IL-8, TNF-α \| Human Multiplex
V-PLEX Plus Viral Panel 2 NHP Kit IFN-γ, IL-1β, IL-6, IL-8, IL-10 \| Non-human primate Multiplex
V-PLEX Plus Viral Panel 2 Human Kit IFN-γ, IL-1β, IL-4, IL-6, IL-8, IL-10, TNF-α \| Human Multiplex
V-PLEX Plus Viral Panel 1 NHP Kit IL-1β, IL-6, IL-8 \| Non-human primate Multiplex
V-PLEX Plus Viral Panel 1 Human Kit IL-1β, IL-6, IL-8, TNF-α \| Human Multiplex
U-PLEX NHP IL-2 Assay IL-2 \| Non-human primate Singleplex
U-PLEX NHP IL-8 Assay IL-8 \| Non-human primate Singleplex
U-PLEX NHP IL-6 Assay IL-6 \| Non-human primate Singleplex
U-PLEX NHP IL-10 Assay IL-10 \| Non-human primate Singleplex
U-PLEX NHP IL-5 Assay IL-5 \| Non-human primate Singleplex
U-PLEX NHP MCP-1 Assay MCP-1 \| Non-human primate Singleplex
U-PLEX Mouse IL-5 Assay IL-5 \| Mouse Singleplex
U-PLEX Mouse IL-10 Assay IL-10 \| Mouse Singleplex
U-PLEX Mouse IL-6 Assay IL-6 \| Mouse Singleplex
U-PLEX Mouse IL-12p70 Assay IL-12p70 \| Mouse Singleplex
U-PLEX Mouse IL-13 Assay IL-13 \| Mouse Singleplex
U-PLEX Mouse IL-4 Assay IL-4 \| Mouse Singleplex
U-PLEX Mouse IL-2 Assay IL-2 \| Mouse Singleplex
U-PLEX NHP IL-12p70 Assay IL-12p70 \| Non-human primate Singleplex
U-PLEX NHP IL-4 Assay IL-4 \| Non-human primate Singleplex
U-PLEX Human MCP-1 Assay MCP-1 \| Human Singleplex
U-PLEX Human IL-13 Assay IL-13 \| Human Singleplex
U-PLEX Human IL-6 Assay IL-6 \| Human Singleplex
U-PLEX Human IL-4 Assay IL-4 \| Human Singleplex
U-PLEX Human IL-8 Assay IL-8 \| Human Singleplex
U-PLEX Human IL-12p70 Assay IL-12p70 \| Human Singleplex
U-PLEX Human IL-10 Assay IL-10 \| Human Singleplex
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Assessing agonistic potential of a candidate therapeutic anti-IL21R antibody.

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