Construction of Exosome SORL1 Detection Platform Based on 3D Porous Microfluidic Chip and its Application in Early Diagnosis of Colorectal Cancer.
Peilong LiJiaci ChenYuqing ChenShangling SongXiaowen HuangYang YangYanru LiYao TongYan XieJuan LiShunxiang LiJiayi WangKun QianChuanxin WangLutao DuPublished in: Small (Weinheim an der Bergstrasse, Germany) (2023)
Exosomes are promising new biomarkers for colorectal cancer (CRC) diagnosis, due to their rich biological fingerprints and high level of stability. However, the accurate detection of exosomes with specific surface receptors is limited to clinical application. Herein, an exosome enrichment platform on a 3D porous sponge microfluidic chip is constructed and the exosome capture efficiency of this chip is ≈90%. Also, deep mass spectrometry analysis followed by multi-level expression screenings revealed a CRC-specific exosome membrane protein (SORL1). A method of SORL1 detection by specific quantum dot labeling is further designed and the ensemble classification system is established by extracting features from 64-patched fluorescence images. Importantly, the area under the curve (AUC) using this system is 0.99, which is significantly higher (p < 0.001) than that using a conventional biomarker (carcinoembryonic antigen (CEA), AUC of 0.71). The above system showed similar diagnostic performance, dealing with early-stage CRC, young CRC, and CEA-negative CRC patients.
Keyphrases
- high throughput
- circulating tumor cells
- label free
- early stage
- single cell
- loop mediated isothermal amplification
- mass spectrometry
- real time pcr
- mesenchymal stem cells
- stem cells
- end stage renal disease
- high resolution
- ejection fraction
- newly diagnosed
- poor prognosis
- convolutional neural network
- optical coherence tomography
- prognostic factors
- liquid chromatography
- squamous cell carcinoma
- middle aged
- sentinel lymph node
- lymph node
- highly efficient
- neoadjuvant chemotherapy
- binding protein