Document Detail

Cascade enzyme-linked immunosorbent assay (CELISA).
MedLine Citation:
PMID:  19665363     Owner:  NLM     Status:  MEDLINE    
Immunoassays are representative biochemical detection methods. Among them, sandwich-type immunoassays, typified by sandwich ELISA, have used in disease diagnosis or biochemical detection with high target selectivity. Horseradish peroxidase and alkaline phosphatase have been typically used for signal amplification in ELISA. Recently developed sandwich-type immunoassays such as biobarcode immunoassays, immuno-PCR, and immuno-RCA have improved sensitivity by changing mainly the signal amplification method. To develop a novel amplification method in ELISA, an enzyme-cascading system was incorporated into an ELISA, and the new assay is termed a cascading enzyme-linked immunosorbent assay (CELISA). This CELISA includes a trypsinogen-enterokinase combination as the cascading enzyme system, and was used to detect alpha-fetoprotein (AFP), which is a liver cancer marker, and prostate-specific antigen (PSA). Using a colorimetric reagent for signal generation, CELISA had 0.1-10pM limits-of-detection for AFP and PSA in whole human serum and assay buffers, depending on the platform, well plate, or microbead type used. This study represents the first example that incorporated an enzyme cascading step in an ELISA system, resulting in successful signal amplification with sensitive detection of pathogenic antigens in serum.
Young-mi Lee; Yujin Jeong; Hyo Jin Kang; Sang J Chung; Bong Hyun Chung
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-07-18
Journal Detail:
Title:  Biosensors & bioelectronics     Volume:  25     ISSN:  1873-4235     ISO Abbreviation:  Biosens Bioelectron     Publication Date:  2009 Oct 
Date Detail:
Created Date:  2009-09-15     Completed Date:  2009-12-01     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9001289     Medline TA:  Biosens Bioelectron     Country:  England    
Other Details:
Languages:  eng     Pagination:  332-7     Citation Subset:  IM    
BioNanotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong, Daejeon 305-333, Republic of Korea.
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MeSH Terms
Biosensing Techniques / instrumentation*
Blood Chemical Analysis / instrumentation*
Colorimetry / instrumentation*
Enzyme-Linked Immunosorbent Assay / instrumentation*
Equipment Design
Equipment Failure Analysis
Neoplasm Proteins / blood*
Tumor Markers, Biological / blood*
Reg. No./Substance:
0/Neoplasm Proteins; 0/Tumor Markers, Biological

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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