Rapid Single-molecule Digital Detection of Protein Biomarkers for Continuous Monitoring of Systemic Immune Disorders
Overview
Authors
Affiliations
Digital protein assays have great potential to advance immunodiagnostics because of their single-molecule sensitivity, high precision, and robust measurements. However, translating digital protein assays to acute clinical care has been challenging because it requires deployment of these assays with a rapid turnaround. Herein, we present a technology platform for ultrafast digital protein biomarker detection by using single-molecule counting of immune-complex formation events at an early, pre-equilibrium state. This method, which we term "pre-equilibrium digital enzyme-linked immunosorbent assay" (PEdELISA), can quantify a multiplexed panel of protein biomarkers in 10 µL of serum within an unprecedented assay incubation time of 15 to 300 seconds over a 104 dynamic range. PEdELISA allowed us to perform rapid monitoring of protein biomarkers in patients manifesting post-chimeric antigen receptor T-cell therapy cytokine release syndrome, with ∼30-minute sample-to-answer time and a sub-picograms per mL limit of detection. The rapid, sensitive, and low-input volume biomarker quantification enabled by PEdELISA is broadly applicable to timely monitoring of acute disease, potentially enabling more personalized treatment.
Clinical Peptidomics: Advances in Instrumentation, Analyses, and Applications.
Li L, Wu J, Lyon C, Jiang L, Hu T BME Front. 2023; 4:0019.
PMID: 37849662 PMC: 10521655. DOI: 10.34133/bmef.0019.
Amyloid-β: A potential mediator of aging-related vascular pathologies.
Khan F, Qiu H Vascul Pharmacol. 2023; 152:107213.
PMID: 37625763 PMC: 11793904. DOI: 10.1016/j.vph.2023.107213.
Miniaturized microarray-format digital ELISA enabled by lithographic protein patterning.
Stephens A, Song Y, McClellan B, Su S, Xu S, Chen K Biosens Bioelectron. 2023; 237:115536.
PMID: 37473549 PMC: 10528924. DOI: 10.1016/j.bios.2023.115536.
Ma B, Liu X, Zhang Z, Ma C, Chand R, Patwardhan S Biosens Bioelectron. 2023; 230:115247.
PMID: 37023552 PMC: 10103176. DOI: 10.1016/j.bios.2023.115247.
Su S, Song Y, Stephens A, Situ M, McCloskey M, McGrath J Biosens Bioelectron. 2023; 224():115030.
PMID: 36603283 PMC: 10401069. DOI: 10.1016/j.bios.2022.115030.