OR502
OR502 is a humanized IgG1 monoclonal antibody targeting LILRB2 (ILT4/CD85d), with a Kd value of 1.18 nM. OR502 binds to LILRB2 with high affinity and blocks its interaction with HLA class I ligands, relieving myeloid cell-mediated immunosuppression, restoring CD8+ T cell function, and reprogramming the immunosuppressive macrophage phenotype, thereby simultaneously enhancing both innate and adaptive antitumor immune responses. OR502 can be used in the research of cancers and advanced cancers (including melanoma, non-small cell lung cancer, sarcoma/soft tissue cancer, and urothelial carcinoma).
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Stockage:
Please store the product under the recommended conditions in the Certificate of Analysis.
Activité biologique
Description
Isotype
Human IgG1 kappa
Recommend Isotype Controls
Species Reactivity
Human
In Vitro
OR502 (0.1-100000 ng/mL) dose-dependently binds to LILRB2-expressing HEK293T cells, reaching near-maximal receptor occupancy at the highest tested concentrations[1].
OR502 (0.01-100 μg/mL) completely blocks the interaction of LILRB2-Fc with HLA-G expressed on B-cell lymphoma 721.221 cells at concentrations of 1 μg/mL and higher[1].
OR502 decreases LPS-induced IL-10 secretion and enhances LPS-induced IFN-γ secretion by human PBMCs, with superior activity relative to benchmark anti-LILRB2 antibodies[1].
OR502 (0-40 μg/mL; 72 h) dose-dependently relieves M2c macrophage-mediated suppression of CD8+ T cell proliferation and enhances IFN-γ and perforin secretion by CD8+ T cells, with superior activity relative to benchmark anti-LILRB2 antibodies[1].
OR502 (0-0.3 μg/mL) dose-dependently enhances IFN-γ secretion by exhausted T cells in the presence of M2c macrophages, and significantly amplifies pembrolizumab-induced IFN-γ production by exhausted T cells when used in combination[1].
OR502 both prevents the development of immunosuppressive M2-like macrophages (when administered during polarization) and reprograms existing immunosuppressive M2-like macrophages (when administered post polarization), leading to increased CD8+ T cell proliferation, IFN-γ secretion, and perforin secretion in coculture assays[1].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
In Vivo
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
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Animal Model:Humanized NSG-SGM3 mice[1]
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Dosage:20 mg/kg
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Administration:i.p.; every 7 days for 42 days
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Result:Exhibited significant tumor growth inhibition, with tumor volume remaining below 200 mm3 through day 42 post-tumor inoculation.
Gene ID
Accession
Target
LILRB2/ILT4
Conjugated
Unconjugated
Reconsititution
The product can be reconstituted/diluted with sterile PBS or saline.
Format
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Product Image
Application
ELISA, FACS, Functional assay
Chemical Information
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Formulation
Please refer to the lot-specific COA for specific buffer information.
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Stockage
Please store the product under the recommended conditions in the Certificate of Analysis.
Pureté et documentation
Références
Calculators
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)