Multiplex Detection of Transgenes Using πCode Technology for Gene Doping Control.

The researchers have developed a proof-of-concept method to detect multiple transgenes, or outside genes injected into an organism, typically associated with gene doping in horse sports. They used a technology called πCode and applied it in the form of fluorescent-coded probes to identify these genes.

Objective of the Research

• The primary aim of the study was the development of a new, highly sensitive method to detect multiple instances of transgene doping in horse sports.
• The researchers aimed to fill the void in existing gene doping detection strategies, as many are not suitable for detecting multiple transgenes.

Methodology of the Study

• The researchers used a sequence of steps involving multiplex polymerase chain reaction (polymerase chain reaction designed for simultaneously examining multiple loci), the development and application of probes labeled with different πCodes, and a median fluorescence intensity measurement of fluorescent πCodes.
• For the proof-of-concept experiment, 12 specific transgenes, which had been cloned into plasmid vectors, were targeted. These plasmids were introduced into horse plasma samples.
• The usage of πCode technology, which prints identification patterns on a particle’s surface, allowed for the detection of all injected transgenes.

Findings of the Study

• The experiment was successful as the πCode technology could identify all the targeted transgenes.
• A notable test case was the ability to detect the erythropoietin (EPO) transgene in blood samples from a horse administered solely with the EPO transgene. This highlights the method’s effectiveness in real-world applications.
• Based on these findings, the researchers concluded that their new πCode detection method is poised to be a substantial upgrade over current detection methods, specifically for multitarget gene detection in gene doping tests.