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Published on: June 14, 2018
cDNA Display-Mediated Immuno-PCR (cD-IPCR): An Ultrasensitive Immunoassay for Biomolecular Detection
Chathuni Jayathilake1, Naoto Nemoto2,3
1Graduate School of Science and Engineering, Saitama University, Saitama, Japan.
Insights
cDNA display immuno-PCR (cD-IPCR) enables sensitive antigen detection by linking antibodies to DNA. This method covalently couples polypeptides with their encoding cDNA for direct use in quantitative PCR, simplifying detection processes.
Area of Science:
- Biochemistry
- Molecular Biology
- Immunology
Background:
- Immuno-PCR (IPCR) is a highly sensitive method for antigen detection using antibody-DNA conjugates.
- Traditional IPCR requires efficient conjugation of antibodies to reporter DNA molecules.
- cDNA display (cD-IPCR) offers a novel approach to achieve this conjugation.
Purpose of the Study:
- To introduce and describe the immuno-PCR method based on cDNA display (cD-IPCR).
- To highlight the advantages of cD-IPCR for sensitive antigen detection.
- To demonstrate the applicability of cD-IPCR for detecting various antigens.
Main Methods:
- Development of cDNA display molecules, which are 1:1 covalent complexes of a polypeptide and its encoding cDNA at the single-molecule level.
- Direct utilization of cDNA display molecules for antigen detection.
- Subsequent application of quantitative PCR (qPCR) for signal amplification and detection.
Main Results:
- The cDNA display molecule serves as a direct tool for antigen detection.
- The method allows for sensitive detection of antigens in biological samples.
- Successful application is contingent on knowing the sequences of single-domain antibodies (VHHs) or peptide aptamers.
Conclusions:
- cD-IPCR represents a significant advancement in immuno-PCR technology.
- This method offers a robust platform for sensitive and specific antigen detection.
- The technique has broad applicability in diagnostics and research, provided specific binding molecule sequences are available.
Abstract:
Immuno-PCR (IPCR) is a sensitive antigen detection by means of specific antibody-DNA conjugates. To ensure the successful conjugation of a protein (an antibody) with a reporter DNA, immuno-PCR method based on cDNA display (cD-IPCR) has been introduced. The cDNA display molecule is a 1:1 covalent complex of a polypeptide and its encoding cDNA at the single molecule level, which is directly used for antigen detection and subsequent qPCR. This method can be applied to detect various antigens in biological samples, if sequences of their single-domain antibodies (VHHs) or peptide aptamers are known.
