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Detection of Exosomes Using Total Internal Reflected Imaging Ellipsometry
Liu HY(刘浩雨)1,2; Liu W(刘巍)1; Jin G(靳刚)1,2
Source PublicationBIOSENSORS-BASEL
2021-05-01
Volume11Issue:5Pages:10
Abstract

Exosomes are a kind of membrane-bound phospholipid nanovesicle that are secreted extensively in a variety of biological fluids. Accumulating evidence has indicated that exosomes not only communicate with cells, but also perform functional roles in physiology and pathology. In addition, exosomes have also elicited a great deal of excitement due to their potential as disease biomarkers. Therefore, requirements for sensitive methods capable of precisely and specifically determining exosomes were needed. Herein, we not only develop a sensing surface to capture exosomes but also compare two surface proteins on exosomes, which are appropriate for detecting exosome surface markers by total internal reflected imaging ellipsometry (TIRIE). Protein G and antibody were immobilized on a thin layer of golden substrate to form the biosensing surface. The bio-interaction between antibodies and exosomes was recorded by the TIRIE in real time. The distance between exosomes adhered on a surface was 44 nm +/- 0.5 nm. The KD of anti-CD9 and exosome was lower than anti-CD63 and exosome by introducing pseudo-first-order interaction kinetics, which suggested that CD9 is more suitable for exosome surface markers than CD63. The limit of detection (LOD) of TIRIE was 0.4 mu g/mL. In conclusion, we have proposed a surface for the detection of exosomes based on TIRIE, which can make the detection of exosomes convenient and efficient.

KeywordTIRIE exosomes surface protein CD9 CD63 interaction kinetics
DOI10.3390/bios11050164
Indexed BySCI
Language英语
WOS IDWOS:000653707800001
WOS KeywordEXTRACELLULAR VESICLES ; SPR DETECTION ; PROTEINS ; IMMUNOSENSOR
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Instruments & Instrumentation
WOS SubjectChemistry, Analytical ; Nanoscience & Nanotechnology ; Instruments & Instrumentation
Classification二类
Ranking1
ContributorJin, Gang
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/86700
Collection微重力重点实验室
Affiliation1.Chinese Acad Sci, Inst Mech, NML, 15 Bei Si Huan West Rd, Beijing 100190, Peoples R China;
2.Univ Chinese Acad Sci, Sch Engn Sci, 19 Yu Quan Rd, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Liu HY,Liu W,Jin G. Detection of Exosomes Using Total Internal Reflected Imaging Ellipsometry[J]. BIOSENSORS-BASEL,2021,11,5,:10.Rp_Au:Jin, Gang
APA Liu HY,Liu W,&Jin G.(2021).Detection of Exosomes Using Total Internal Reflected Imaging Ellipsometry.BIOSENSORS-BASEL,11(5),10.
MLA Liu HY,et al."Detection of Exosomes Using Total Internal Reflected Imaging Ellipsometry".BIOSENSORS-BASEL 11.5(2021):10.
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