Anti-Human PD-L1 (CD274) (Durvalumab)

Anti-Human PD-L1 (CD274) (Durvalumab)

Product No.: P690

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Product No.P690
Product Type
Biosimilar Recombinant Human Monoclonal Antibody
Alternate Names
Durvalumab, PD-L1, B7-H1
Human IgG1κ

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Select Product Size
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Antibody Details

Product Details

Reactive Species
Expression Host
HEK-293 Cells
FC Effector Activity
Recommended Isotype Controls
Human PD-L1
Product Concentration
≥ 5.0 mg/ml
Endotoxin Level
≤ 1.0 EU/mg as determined by the LAL method
≥95% by SDS Page
≥95% monomer by analytical SEC
This biosimilar antibody is aseptically packaged and formulated in 0.01 M phosphate buffered saline (150 mM NaCl) PBS pH 7.2 - 7.4 with no carrier protein, potassium, calcium or preservatives added. Due to inherent biochemical properties of antibodies, certain products may be prone to precipitation over time. Precipitation may be removed by aseptic centrifugation and/or filtration.
State of Matter
Product Preparation
Recombinant biosimilar antibodies are manufactured in an animal free facility using only in vitro protein free cell culture techniques and are purified by a multi-step process including the use of protein A or G to assure extremely low levels of endotoxins, leachable protein A or aggregates.
Storage and Handling
Functional grade biosimilar antibodies may be stored sterile as received at 2-8°C for up to one month. For longer term storage, aseptically aliquot in working volumes without diluting and store at -80°C. Avoid Repeated Freeze Thaw Cycles.
Regulatory Status
Research Use Only (RUO). Non-Therapeutic.
Country of Origin
2-8°C Wet Ice
Additional Applications Reported In Literature ?
Each investigator should determine their own optimal working dilution for specific applications. See directions on lot specific datasheets, as information may periodically change.


Durvalumab activity is directed against human PD-L1.
Antigen Distribution
PD-L1 is commonly expressed on the surface of antigen-presenting cells (macrophages, activated B cells, dendritic cells), some epithelial cells under inflammatory conditions, some activated T cells, and several types of tumors as well as tumor-infiltrating immune cells. PD-L1 can also exist in a soluble form (sPD-L1) in myeloid-derived cells (monocytes, macrophages, and dendritic cells) and several human cancer lines.
Programmed cell death 1 ligand 1 (PD-L1; CD274; B7-H1) is a type I transmembrane glycoprotein widely expressed in many types of tissues that acts as a ligand for the immune inhibitory receptor programmed cell death 1 (PD-1; CD279) 1,2,3 and B7.1 4. The PD-1 pathway is responsible for T cell activation, proliferation, and cytotoxic secretion, with PD-1/PD-L1 interaction triggering inhibitory signals that dampen T cell function. PD-L1 also plays a critical role in the differentiation of inducible regulatory T cells 5.

In normal tissues, PD-L1/PD-1 ligation is crucial to maintaining homeostasis of the immune system and preventing autoimmunity during infection and inflammation 5. In the tumor microenvironment, their interaction provides an immune escape mechanism for tumor cells by turning off cytotoxic T cells. As such, blocking the PD-L1/PD-1 interaction is a target of many anti-cancer immunotherapies.

Durvalumab was generated using IgG2 and IgG4 XenoMouse animals immunized with human PD-L1-Ig or CHO cells expressing human PD-L1 6. Hybridomas were screened for binding to human PD-L1-transfected HEK 293 cells and inhibition of PD-1 binding to PD-L1 expressing CHO cells. To avoid triggering antibody-dependent cellular cytotoxicity and complement-dependent cytotoxicity, the constant domain was then exchanged for a human IgG1 triple-mutant domain that reduces binding to C1q and Fc gamma receptors. Durvalumab binds specifically to PD-L1 and inhibits interaction with PD-1 and CD80. Durvalumab does not cross react with human PD-L2, B7-H3, or mouse PD-L1. Durvalumab has been investigated as an anti-tumor immunotherapeutic agent in various clinical trials and yields significant improvement in progression-free survival 7,8,9,10.

Antigen Details

PD-1 (CD279)
NCBI Gene Bank ID
Research Area

References & Citations

1. Freeman GJ, Long AJ, Iwai Y, et al. J Exp Med. 2000192(7):1027-1034. 2000.
2. Tsai KK, Zarzoso I, Daud AI. Hum Vaccin Immunother. 10(11):3111-3116. 2014.
3. Han Y, Liu D, Li L. Am J Cancer Res. 10(3):727-742. 2020.
4. Kim ES. Drugs. 77(8):929-937. 2017.
5. Dermani FK, Samadi P, Rahmani G, et al. J Cell Physiol. 234(2):1313-1325. 2019.
6. Stewart R, Morrow M, Hammond SA, et al. Cancer Immunol Res. 3(9):1052-1062. 2015.
7. Reichert JM. MAbs. 9(2):167-181. 2017.
8. Faiena I, Cummings AL, Crosetti AM, et al. Drug Des Devel Ther. 12:209-215. 2018.
9. Mathieu L, Shah S, Pai-Scherf L, et al. Oncologist. 26(5):433-438. 2021.
10. Melillo G, Chand V, Yovine A, et al. Adv Ther. 38(6):2759-2778. 2021.
Indirect Elisa Protocol
Flow Cytometry
Immunoprecipitation Protocol
General Western Blot Protocol
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Formats Available

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Products are for research use only. Not for use in diagnostic or therapeutic procedures.