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Human PD-L1(Programmed Cell Death Protein 1 Ligand 1) ELISA Kit

Citations(5)Uniprot : Q9NZQ7

Cat.No.:E-EL-H1547
Reactivity: Human

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Product Details

Properties

Assay type	Sandwich-ELISA
Format	96T/48T/24
Assay time	3.5h
Detection range	0.16-10 ng/mL
Sensitivity	0.10 ng/mL
Sample type &Sample volume	serum, plasma and other biological fluids; 100μL
Specificity	This kit recognizes Human PD-L1 in samples. No significant cross-reactivity or interference between Human PD-L1 and analogues was observed.
Reproducibility	Both intra-CV and inter-CV are < 10%.
Application	This ELISA kit applies to the in vitro quantitative determination of Human PD-L1 concentrations in serum, plasma and other biological fluids.

Test Principle

This ELISA kit uses the Sandwich-ELISA principle. The micro ELISA plate provided in this kit has been pre-coated with an antibody specific to Human PD-L1. Standards or samples are added to the micro ELISA plate wells and combined with the specific antibody. Then a biotinylated detection antibody specific for Human PD-L1 and Avidin-Horseradish Peroxidase (HRP) conjugate are added successively to each micro plate well and incubated. Free components are washed away. The substrate solution is added to each well. Only those wells that contain Human PD-L1, biotinylated detection antibody and Avidin-HRP conjugate will appear blue in color. The enzyme-substrate reaction is terminated by the addition of stop solution and the color turns yellow. The optical density (OD) is measured spectrophotometrically at a wavelength of 450 nm ± 2 nm. The OD value is proportional to the concentration of Human PD-L1. You can calculate the concentration of Human PD-L1 in the samples by comparing the OD of the samples to the standard curve.

Kit components & Storage

An unopened kit can be stored at 2-8℃ for 1 month. If the kit is not supposed to be used within 1 month, store the components separately according to the following conditions once the kit is received.

Item	Specifications	Storage
Micro ELISA Plate(Dismountable)	96T: 8 wells ×12 strips 48T: 8 wells ×6 strips	-20℃, 12 months
Reference Standard	96T: 2 vials 48T: 1 vial
Concentrated Biotinylated Detection Ab (100×)	96T: 1 vial, 120 μL 48T: 1 vial, 60 μL
Concentrated HRP Conjugate (100×)	96T: 1 vial, 120 μL 48T: 1 vial, 60 μL	-20℃(Protect from light), 12 months
Reference Standard & Sample Diluent	1 vial, 20 mL	2-8°C, 12 months
Biotinylated Detection Ab Diluent	1 vial, 14 mL
HRP Conjugate Diluent	1 vial, 14 mL
Concentrated Wash Buffer (25×)	1 vial, 30 mL
Substrate Reagent	1 vial, 10 mL	2-8℃(Protect from light)
Stop Solution	1 vial, 10 mL	2-8°C
Plate Sealer	5 pieces
Manual	1 copy
Certificate of Analysis	1 copy

Technical Data

Precision

Intra-assay Precision (Precision within an assay): 3 samples with low, mid range and high level Human PD-L1 were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level Human PD-L1 were tested on 3 different plates, 20 replicates in each plate.

	Intra-assay Precision			Inter-assay Precision
Sample	1	2	3	1	2	3
n	20	20	20	20	20	20
Mean (ng/mL)	0.54	1.35	4.76	0.49	1.29	5.23
Standard deviation	0.03	0.08	0.17	0.03	0.05	0.18
CV (%)	5.56	5.93	3.57	6.12	3.88	3.44

Recovery

The recovery of Human PD-L1 spiked at three different levels in samples throughout the range of the assay was evaluated in various matrices.

Sample Type	Range (%)	Average Recovery (%)
Serum(n=8)	95-111	102
EDTA plasma (n=8)	92-104	98
Cell culture media (n=8)	90-102	95

Linearity

Samples were spiked with high concentrations of Human PD-L1 and diluted with Reference Standard & Sample Diluent to produce samples with values within the range of the assay.

Target Information

Database Links	SwissProt: Q9NZQ7
Synonyms	CD274, B7-H1, PD-L1, PDCD1L1, PDL1, B7 homolog 1
Research Area	Cancer, Immunology

Assay Procedures

	1. Add 100μL standard or sample to the wells. Incubate for 90 min at 37°C
	2. Discard the liquid, immediately add 100μL Biotinylated Detection Ab working solution to each well. Incubate for 60 min at 37°C
	3. Aspirate and wash the plate for 3 times
	4. Add 100μL HRP conjugate working solution. Incubate for 30 min at 37°C. Aspirate and wash the plate for 5 times
	5. Add 90μL Substrate Reagent. Incubate for 15 min at 37°C
	6. Add 50μL Stop Solution
	7. Read the plate at 450nm immediately. Calculation of the results

Citations

SCANDINAVIAN JOURNAL OF IMMUNOLOGY (2017) IF: 2.256

Serum sPD‐L1, Upregulated in Sepsis, May Reflect Disease Severity and Clinical Outcomes in Septic Patients

DOI: 10.1111/sji.12509
	Sample: Serum

Biomed Research International (2021) IF: 3.411

Relationship of PD-1 (PDCD1) and PD-L1 (CD274) Single Nucleotide Polymorphisms with Polycystic Ovary Syndrome

DOI: 10.1155/2021/9596358
PMID: 33521133	Sample: Serum

Frontiers in Immunology (2021) IF: 7.561

PD-L1 Dysregulation in COVID-19 Patients

DOI: 10.3389/fimmu.2021.695242
	Sample: Serum

BIOSENSORS & BIOELECTRONICS (2022) IF: 10.618

Microfluidic-based exosome isolation and highly sensitive aptamer exosome membrane protein detection for lung cancer diagnosis

DOI: 10.1016/j.bios.2022.114487
PMID: 35780540	Sample: Exosomes

Acta Pharmaceutica Sinica B (2021) IF: 11.614

Abrogation of HnRNP L enhances anti-PD-1 therapy efficacy via diminishing PD-L1 and promoting CD8+ T cell-mediated ferroptosis in castration-resistant prostate cancer

DOI: 10.1016/j.apsb.2021.07.016
	Sample: Pc3 Cells,Du145 Cells

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