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Antibody-coupled monolithic silica microtips for highthroughput molecular profiling of circulating exosomes
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Antibody-coupled monolithic silica microtips for highthroughput molecular profiling of circulating exosomes
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Journal Article
Antibody-coupled monolithic silica microtips for highthroughput molecular profiling of circulating exosomes
2014
Overview
Exosome-mediated signal transportation plays a variety of critical roles in cancer progression and metastasis. From the aspect of cancer diagnosis, circulating exosomes are ideal resources of biomarkers because molecular features of tumor cells are transcribed on them. However, isolating pure exosomes from body fluids is time-consuming and still major challenge to be addressed for comprehensive profiling of exosomal proteins and miRNAs. Here we constructed anti-CD9 antibody-coupled highly porous monolithic silica microtips which allowed automated rapid and reproducible exosome extraction from multiple clinical samples. We applied these tips to explore lung cancer biomarker proteins on exosomes by analyzing 46 serum samples. The mass spectrometric quantification of 1,369 exosomal proteins identified CD91 as a lung adenocarcinoma specific antigen on exosomes, which was further validated with CD9-CD91 exosome sandwich ELISA measuring 212 samples. Our simple device can promote not only biomarker discovery studies but also wide range of omics researches about exosomes.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
/ 82/1
/ 82/58
/ 82/80
/ 82/81
/ 82/83
/ Adult
/ Antibodies, Immobilized - chemistry
/ Biomarkers, Tumor - immunology
/ Biomarkers, Tumor - isolation & purification
/ Cancer
/ Enzyme-linked immunosorbent assay
/ Exosomes
/ Female
/ Humanities and Social Sciences
/ Humans
/ Low Density Lipoprotein Receptor-Related Protein-1 - blood
/ Low Density Lipoprotein Receptor-Related Protein-1 - immunology
/ Low Density Lipoprotein Receptor-Related Protein-1 - isolation & purification
/ Male
/ Proteins
/ Science
/ Silica
