Agglutination-PCR

Agglutination-PCR (ADAP) is an ultrasensitive solution-phase method for detecting antibodies.[1] [2] Antibodies bind to and agglutinate synthetic antigen–DNA conjugates, enabling ligation of the DNA strands and subsequent quantification by qPCR. Like other Immuno-PCR (IPCR) detection methods[3][4] ADAP combines the specificity of antibody-antigen recognition and the sensitivity of PCR. ADAP detects zepto- to attomoles of antibodies in 2 μL of sample with a dynamic range spanning 5–6 orders of magnitude. For example, ADAP allows to detect anti-thyroglobulin autoantibodies from human patient plasma with a 1000-fold increased sensitivity over an FDA-approved radioimmunoassay. ADAP also allows to simultaneously detect multiple antibodies in one experiment, much more than ELISA or Radioimmunoassay.

Another advantage of ADAP method is the simplicity. It can be adapted to such a cheap equipment as, for example, SlipChip.[5][6] It does not require complex and expensive equipment, it does not require working with hazardous radioactive reagents.

References

  1. ↑ Cheng-ting Tsai, Peter V. Robinson, Carole A. Spencer, Carolyn R. Bertozzi.(2016). Ultrasensitive Antibody Detection by Agglutination-PCR (ADAP). ACS Central Science,; doi:10.1021/acscentsci.5b00340
  2. ↑ Toward diagnosing diseases such as cancer in their earliest stages. ScienceDaily, 2 March 2016
  3. ↑ Chang, L., Li, J., & Wang, L. (2016). Immuno-PCR: An Ultrasensitive Immunoassay for Biomolecular Detection. Analytica Chimica Acta. 910, 12–24 doi:10.1016/j.aca.2015.12.039
  4. ↑ Spengler, M., Adler, M., & Niemeyer, C. M. (2015). Highly sensitive ligand-binding assays in pre-clinical and clinical applications: immuno-PCR and other emerging techniques. (Open Critical Review). Analyst, 140(18), 6175-6194. doi:10.1039/C5AN00822K
  5. ↑ Shen, F., Du, W., Kreutz, J. E., Fok, A., & Ismagilov, R. F. (2010). Digital PCR on a SlipChip. Lab on a Chip, 10(20), 2666-2672. doi:10.1039/c004521g PMC 2948063
  6. ↑ Jesus Rodriguez-Manzano, Mikhail A. Karymov, Stefano Begolo, David A. Selck, Dmitriy V. Zhukov, Erik Jue, Rustem F. Ismagilov (2016). Reading Out Single-Molecule Digital RNA and DNA Isothermal Amplification in Nanoliter Volumes with Unmodified Camera Phones. ACS Nano; doi:10.1021/acsnano.5b0733
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