Enzyme immunoassay for the quantitative determination of free Pembrolizumab (Keytruda®) in serum and plasma.
This kit has been especially developed for the quantitative determination of pembrolizumab in serum and plasma samples between the Cmin and Cmax range of concentrations.
Pembrolizumab Drug Bank Accession Number is DB09037.
Pembrolizumab is a PD-1 blocking antibody used to treat various types of cancer, including metastatic melanoma, non small-cell lung cancer, cervical cancer, head and neck cancer, and Hodgkin's lymphoma. As a highly selective IgG4-kappa humanized monoclonal antibody against PD-1 receptors, pembrolizumab binds with high affinity to the cell surface receptor programmed cell death protein 1 (PD-1) and antagonizes its interaction with its known ligands PD-L1 and PD-L2. The binding of pembrolizumab to PD-1 prevents this inhibitory pathway, causing a physiological shift towards immune reactivity and enhancing tumor immunosurveillance and anti-tumor immune response. Measurement of biological drug trough levels and antibody to biological drug gained high importance during the course of treatment. These measurements enable dose adjustments and switch to another class of biological drug when necessary.
All SHIKARI® ELISA kits are suitable for biosimilar work.
All SHIKARI® ELISA kits are produced under ISO 13485 quality system.
Research Use Only (RUO)
For technical inquiry, IFU and other relevant documents please contact techsupport@matriksbiotek.com
| Required Volume (µl) | 10 |
| Total Time (min) | 140 |
| Sample | Serum, plasma |
| Sample Number | 96 |
| Detection Limit (ng/mL) | 10 |
| Spike Recovery (%) | Between 85-115 |
| Shelf Life (year) | 1 |
| Assay type | Quantitative |
| Species Reactivity | Human |
| Storage conditions | Store at +4°C. Please refer to protocols. |
| Shipping conditions | At room temperature |
| # | File | Action |
|---|---|---|
| Safety Data Sheet (SDS) | Download |
Publications with this drug
| # | File | Action |
|---|---|---|
| Martinez, C., et al. "374P: Prognostic relevance of post-cycle 1 pembrolizumab levels in real-world NSCLC patients receiving first line IO or ChIO." Journal of Thoracic Oncology 20.3 (2025): S220-S221. | Visit Link | |
| Martínez-Toledo, Cristina, et al. "Early Pembrolizumab Plasma Levels as a Prognostic Biomarker in Real-World NSCLC Patients." Pharmacological Research (2026): 108232. | Download | |
| Vázquez-Quiroga, Sara, et al. "Evaluation of the exposure-response relationship of pembrolizumab in non-small cell lung cancer: observational study protocol in real-world clinical practice." BMC Cancer 26.1 (2026): 630. | Visit Link |

