Researchers Develop Simple Prostate Cancer Assays for ERG

Researchers Develop Simple Prostate Cancer Assays for ERG
In terms of early prostate cancer detection methods, more is better. Researchers at Pacific Northwest National Laboratory in Richland, Washington determined that the ETS-related gene (ERG) is a reliable biomarker for prostate cancer and can be detected using simple assays available in the clinic. Standard procedure for detecting prostate cancer includes a serum analysis for prostate-specific antigen (PSA), a urine analysis for prostate cancer antigen 3 (PCA3), and a tissue analysis for alpha-methylacyl-coA racemase (AMACR), all of which are proteins that are over produced in cases of prostate cancer. However, other proteins are associated with prostate cancer, including the oncoprotein ERG. The researchers at Pacific Northwest National Laboratory noted that there are no commercially available serological-based assays for ERG and investigated how they could develop one in the study "Analytical Platform Evaluation for Quantification of ERG in Prostate Cancer Using Protein and mRNA Detection Methods," published in Journal of Translational Medicine. After considering a variety of technologies capable of analyzing proteins, the research team chose to develop multiple platforms that could detect both protein and the genetic material used to make proteins (mRNA). First, the team looked at the method of high-pressure high-resolution separations with intelligent selection and multiplexing (PRISM) selected reaction monitoring mass spectrometry (SRM-MS). Essentially, the value of PRISM-SRM is its ability to accurately quantify distinct peptides. Using this technology, the team obtained highly sensitive measurements of three ERG peptide units in prostate cancer cells with detection limits as low as 20 picograms. Importantly, the method was able to detect peptide levels in u
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