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2015 ; 5
(ä): 11034
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Ultra-sensitive protein detection via Single Molecule Arrays towards early stage
cancer monitoring
#MMPMID26052106
Schubert SM
; Arendt LM
; Zhou W
; Baig S
; Walter SR
; Buchsbaum RJ
; Kuperwasser C
; Walt DR
Sci Rep
2015[Jun]; 5
(ä): 11034
PMID26052106
show ga
The early diagnosis of cancers and continued monitoring of tumor growth would be
greatly facilitated by the development of a blood-based, non-invasive, screening
technique for early cancer detection. Current technologies for cancer screening
and detection typically rely on imaging techniques or blood tests that are not
accurate or sensitive enough to definitively diagnose cancer at its earliest
stages or predict biologic outcomes. By utilizing Single Molecule Arrays (SiMoA),
an ultra-sensitive enzyme-linked immunosorbent assay (ELISA) technique, we were
able to measure increasing levels of prostate specific antigen (PSA) within
murine serum over time, which we attribute to tumor development. The measured
concentrations of PSA were well below the detectable limits of both a leading
clinical diagnostic PSA ELISA assay as well as a commercial ultra-sensitive PSA
assay. Our work benchmarks the role of SiMoA as a vital tool in monitoring
previously non-detectable protein biomarkers in serum for early cancer detection
and offers significant potential as a non-invasive platform for the monitoring of
early stage cancer.