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Ultrasensitive Immunoassays

 

Ultrasensitive immunoassays developed by RBM based on the Simoa® technology

 

When levels of key protein biomarkers are extremely low in blood plasma or serum, RBM can use the single-molecule array (Simoa) platform from Quanterix to  quantify such biomarkers with high precision and unprecedented sensitivity to deliver an unparalleled approach to clinical research.

 

RBM began building ultrasensitive immunoassays on the Simoa platform in 2014. This platform measures individual proteins at concentrations up to 1000 times lower than previous immunoassay options, allowing our team to quantify protein biomarkers that would have previously been undetectable.  achieving orders-of-magnitude greater sensitivity than conventional immunoassay platforms.

 

RBM builds our ultrasensitive immunoassays in-house as singleplex assays. We apply our multi-step quality process to ensure that our Simoa-based assays deliver high precision and unprecedented sensitivity, even when a protein biomarker is only present at extremely low values. Our Simoa-based assays are validated according to clinical laboratory standards and provide ultrasensitive measurement of biomarkers, achieving orders-of-magnitude greater sensitivity than conventional immunoassay platforms.

We expand our Simoa-based assay menu based on markers that are clinically significant and support unmet needs in therapeutic development. Serum and plasma are the most common sample types for Simoa testing, but we accept other biological fluids including cerebrospinal fluid (CSF), urine, tissue culture supernatants, bronchoalveolar lavage, synovial fluid, tissue extracts, tears, and skin washings. Currently, we offer the following assays.

Simoa-based Biomarker Services



 
Biomarker LLOQ*
(Serum and Plasma)		 LLOQ*
(Undiluted Samples)		 Volume Required
Serum or plasma Other fluids**
Alpha-synuclein Simoa (A-Syn Simoa) 0.20 ng/mL 0.01 ng/mL 100 µL 150 µL
Beta Amyloid 40 (AB40) 28 pg/mL 5.6 pg/mL 100 µL 150 µL
Beta Amyloid 42 (AB42) 47 pg/mL 4.7 pg/mL 50 µL 150 µL
B Lymphocyte Chemoattractant (BLC, CXCL13) 0.64 pg/mL 0.064 pg/mL 50 µL 150 µL
Fibroblast Growth Factor 23 (FGF-23) 0.65 pg/mL 0.1625 pg/mL 100 µL 150 µL
Glial Fibrillary Acidic Protein (GFAP) 0.70 pg/mL 0.175 pg/mL 100 µL 150 µL
Granulocyte colony-stimulating factor Simoa (G-CSF) 0.59 pg/mL 0.059 pg/mL 50 µL 150 µL
Granulocyte-Macrophage Colony-Stimulating Factor (GM-CSF) 0.036 pg/mL 0.009 pg/mL 100 µL 150 µL
Granzyme B (GranzymeB) 0.30 pg/mL 0.075 pg/mL 100 µL 150 µL
Growth/differential factor 11 (GDF-11) 5.00 pg/mL 1.25 pg/mL 100 µL 150 µL
Interferon alpha (IFN-alpha) 0.11 pg/mL 0.055 pg/mL 150 µL 150 µL
Interferon beta (IFN-beta) 0.16 pg/mL 0.04 pg/mL 100 µL 150 µL
Interferon gamma (IFN-gamma) 0.019 pg/mL 0.0095 pg/mL 150 µL 150 µL
Interleukin-1 beta (IL-1 beta) 0.031 pg/mL 0.016 pg/mL 150 µL 150 µL
Interleukin-2 (IL-2) 0.050 pg/mL 0.025 pg/mL 150 µL 150 µL
Interleukin-4 (IL-4) 0.012 pg/mL 0.006 pg/mL 150 µL 150 µL
Interleukin-5 (IL-5) 0.052 pg/mL 0.026 pg/mL 150 µL 150 µL
Interleukin-6 (IL-6) 0.012 pg/mL 0.003 pg/mL 100 µL 150 µL
Interleukin-8 (IL-8) 0.86 pg/mL 0.0287 pg/mL 50 µL 150 µL
Interleukin-10 (IL-10) 0.037 pg/mL 0.0092 pg/mL 100 µL 150 µL
Interleukin-12 Subunit p40 (IL-12p40) 7.30 pg/mL 0.730 pg/mL 50 µL 150 µL
Interleukin-13 (IL-13) 0.099 pg/mL 0.0495 pg/mL 150 µL 150 µL
Interleukin-15 (IL-15) 0.021 pg/mL 0.00525 pg/mL 100 µL 150 µL
Interleukin-17A (IL-17A) 0.048 pg/mL 0.012 pg/mL 100 µL 150 µL
Interleukin-17C (IL-17C) 0.26 pg/mL 0.13 pg/mL 150 µL 150 µL
Interleukin-17F (IL-17F)1 0.20 pg/mL 0.1 pg/mL 150 µL 150 µL
Interleukin-19 (IL-19) 1.2 pg/mL 0.3 pg/mL 100 µL 150 µL
Interleukin-21 (IL-21) 0.0053 pg/mL 0.00235 pg/mL 150 µL 150 µL
Interleukin-22 (IL-22) 0.047 pg/mL 0.01175 pg/mL 100 µL 150 µL
Interleukin-23 (IL-23) 0.039 pg/mL 0.0195 pg/mL 150 µL 150 µL
Interleukin-31 (IL-31) 0.024 pg/mL 0.006 pg/mL 100 µL 150 µL
Interleukin-33 (IL-33) 0.19 pg/mL 0.095 pg/mL 150 µL 150 µL
Myeloid cell surface antigen CD33 0.11 ng/mL 0.0022 ng/mL 100 µL 150 µL
Neurofilament Light Chain (NF-L) 1.00 pg/mL 0.25 pg/mL 100 µL 150 µL
Neurofilament heavy polypeptide – phosphorylated (pNF-H) 3.8 pg/mL 0.95 pg/mL 100 µL 150 µL
Phospho-Tau181 (pTau181) 2.8 pg/mL 1.4 pg/mL 150 µL 150 µL
Phospho-Tau217 (pTau217) 0.027 pg/mL 0.00675 pg/mL 100 µL 150 µL
Programmed Death-Ligand 1 (PD-L1) 2.1 pg/mL 0.21 pg/mL 50 µL 150 µL
Receptor Activator of Nuclear Factor Kappa B Ligand (RANKL) 0.58 pg/mL 0.145 pg/mL 100 µL 150 µL
Tau 0.22 pg/mL 0.055 pg/mL 100 µL 150 µL
Thymic Stromal Lymphopoietin Simoa 0.13 pg/mL 0.0325 pg/mL 100 µL 150 µL
Triggering receptor expressed on myeloid cells-1 0.94 ng/mL 0.094 ng/mL 50 µL 50 µL
Triggering Receptor Expressed On Myeloid Cells 2 (TREM2) 0.59 ng/mL 0.59 ng/mL 100 µL 150 µL
Tumor Necrosis Factor-alpha (TNF-α) 0.078 pg/mL 0.020 pg/mL 100 µL 150 µL

 

* Lower limit of quantitation (LLOQ) represents the lowest amount of an analyte that can be quantitatively determined with acceptable precision. LLOQ is determined by performing 2-fold serial dilutions of Standard to be tested in triplicate over three runs. The percent coefficient of variation (CV) is calculated for each of the dilution replicates, and the LLOQ is determined as the concentration at which the CV is 30%.

** Cerebrospinal fluid, urine, tissue culture supernatants,  bronchoalveolar lavage, synovial fluid, tissue extracts, tears, skin washings, etc.

 

1 This assay did not meet performance specifications in EDTA-Plasma and results should be used for information purposes only.

All assay services are performed in our CLIA-certified laboratory.
Intended for Research Use Only.