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Prostate cancer: New blood marker could enable a simple blood test

Together in search of the decisive clue in the blood: Dr. Ielizaveta Gorodetska (left) and Prof. Anna Dubrovska (right) from OncoRay Dresden.
Dr. Ielizaveta Gorodetska (left) and Prof. Anna Dubrovska (right) are conducting research at OncoRay in Dresden to better assess prostate cancer using blood tests. Soňa Michlíková
From: Wissensland
Researchers in Dresden have discovered a protein in the blood that reveals how aggressive a prostate tumor is. Following further tests, MMP11 could be used as a simple blood test in the future and make cancer therapy more targeted.

Every year, tens of thousands of men in Germany are diagnosed with prostate cancer. According to data from the Robert Koch Institute, there were around 80,000 cases in 2023. If the disease is detected early, the chances of recovery are good. However, at an advanced stage, prostate cancer is difficult to treat. A major problem is that doctors often do not know exactly how aggressive a tumor really is. Researchers in Dresden have now found a possible new indicator in the blood.

A team led by Prof. Anna Dubrovska and Dr. Ielizaveta Gorodetska from OncoRay – National Center for Radiation Research in Oncology has identified a protein that can be detected in the blood and may be associated with particularly aggressive disease progression. OncoRay is jointly funded by the Helmholtz-Zentrum Dresden-Rossendorf (HZDR), the University Hospital Carl Gustav Carus Dresden and the Faculty of Medicine at TU Dresden.

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A protein as an early warning system

The protein discovered is called MMP11, short for matrix metalloproteinase 11. It belongs to a group of enzymes that can, among other things, remodel tissue. The researchers were able to show that if high levels of MMP11 are detectable in a patient's blood plasma, this is more frequently associated with advanced and high-risk prostate cancer in the patient data analyzed – in other words, with poorer chances of recovery.

But how does MMP11 get into the blood? The scientists found evidence of a molecular chain reaction in the body. Certain enzymes activate a signaling molecule, which in turn boosts the production of MMP11. This signaling pathway could contribute to tumor cells becoming more aggressive and spreading more easily in the body. This can lead to metastases – secondary tumors in other organs.

Little blood, big effect

It is particularly promising that MMP11 could potentially be detected through a simple blood test. This approach is known as a “liquid biopsy” – an examination of blood instead of tissue samples. For patients, this is far less invasive than a surgical procedure. “Our data show that MMP11 is not only a biologically relevant driver of tumor aggressiveness, but could also be a clinically useful marker,” explains Dubrovska. In the long term, the researcher says, such a blood test could help doctors tailor treatments more precisely to individual patients and avoid over- or undertreatment.

However, it will still take several years before the test can be used in clinical practice. First, MMP11 must be further studied in larger and independent patient groups. The German Research Foundation is funding a research project led by Gorodetska in collaboration with the Maria Skłodowska-Curie National Research Institute of Oncology in Poland.

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