Engineering a tunable micropattern-array assay to sort single extracellular vesicles and particles to detect RNA and protein in situ.
Publication Title
J Extracell Vesicles
Document Type
Article
Publication Date
11-1-2023
Keywords
Humans; Extracellular Vesicles; Lipopolysaccharides; MicroRNAs; RNA, Messenger; Lipoproteins; Glioblastoma; extracellular RNA; glioblastoma multiforme; heterogeneity; multiparametric; single extracellular vesicle; single lipoprotein.; washington; isb
Abstract
The molecular heterogeneity of extracellular vesicles (EVs) and the co-isolation of physically similar particles, such as lipoproteins (LPs), confounds and limits the sensitivity of EV bulk biomarker characterization. Herein, we present a single-EV and particle (siEVP) protein and RNA assay (siEVP PRA) to simultaneously detect mRNAs, miRNAs, and proteins in subpopulations of EVs and LPs. The siEVP PRA immobilizes and sorts particles via positive immunoselection onto micropatterns and focuses biomolecular signals in situ. By detecting EVPs at a single-particle resolution, the siEVP PRA outperformed the sensitivities of bulk-analysis benchmark assays for RNA and protein. To assess the specificity of RNA detection in complex biofluids, EVs from various glioma cell lines were processed with small RNA sequencing, whereby two mRNAs and two miRNAs associated with glioblastoma multiforme (GBM) were chosen for cross-validation. Despite the presence of single-EV-LP co-isolates in serum, the siEVP PRA detected GBM-associated vesicular RNA profiles in GBM patient siEVPs. The siEVP PRA effectively examines intravesicular, intervesicular, and interparticle heterogeneity with diagnostic promise.
Clinical Institute
Cancer
Specialty/Research Institute
Institute for Systems Biology
Specialty/Research Institute
Oncology
DOI
10.1002/jev2.12369 http
