Immuno-PCR (iPCR) is a highly sensitive technique that integrates the specificity of immunoassays with the amplification power of polymerase chain reaction (PCR). This method has gained attention for its ability to detect low-abundance proteins and has several applications across various fields, including diagnostics and research.

In practical applications of iPCR, a linker molecule is essential for connecting the DNA tag to the detection antibodies. The specific antibody binds to the targeted antigen that is coated on microtiter plates. The linker molecules then facilitate the attachment of the antibody-antigen complex to the DNA sequence. Following this, the DNA is amplified through PCR, and the quantity of PCR product generated is directly proportional to the amount of antigen recognized by the antibodies.

Additionally, iPCR is suitable for use with a wide array of biologically complex samples, including sera, blood, urine, saliva, stool, cell cultures, as well as food and plant extracts. This versatility enhances its applicability across various fields.

Applications

• Diagnostic Use: iPCR has been shown to be more sensitive than other methods for detecting specific antibodies.
• Food Safety: An ultrasensitive immuno-PCR method was developed for quantifying crustacean tropomyosin in food products, indicating its utility in food safety testing.
• Cancer Research: iPCR has been employed in cancer diagnostics, providing a means to detect low levels of tumor markers, which is crucial for early detection and monitoring.