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Dresden researcher studies the influence of gut bacteria on cancer therapies

Researcher with a global network: Dr. Mohamed Elgendy coordinates partners on three continents - from Dresden.
Dr. Mohamed Elgendy coordinates the international research project METRICs at the Faculty of Medicine at TU Dresden. © MSNZ
From: Wissensland
Gut bacteria could help make cancer therapies more effective. The international METRICs project, led by TU Dresden, is exploring this with around €2 million in funding and partners across three continents.

Billions of bacteria live in our gut. They help with digestion, influence the immune system and could even help make cancer therapies more effective in the future. This is exactly what an international research team led from Dresden is investigating.

The project is called METRICs and is coordinated by Dr. Mohamed Elgendy, a researcher at the Institute of Pharmacology and Toxicology at the Faculty of Medicine at TU Dresden. The European funding programme ERA-NET Transcan is providing around €2 million. This makes METRICs the largest project funded under this scheme since its launch in 2011. Seven partner institutions across three continents are working together to develop new cancer treatment strategies.

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Why the intestine plays a role in cancer

At the heart of the project is a question that researchers worldwide are trying to answer: why do some cancer patients respond well to certain therapies while others do not? One possible explanation lies in the gut and in metabolism. The gut is home to a vast community of microorganisms, known as the gut microbiota. Together with the metabolism of tumors and the body as a whole, they appear to influence how effective combined immunotherapy and radiotherapy are.

Preliminary studies suggest that certain compositions of gut bacteria, as well as lower levels of indole – a metabolic product of these bacteria – are associated with a better response to treatment. In preclinical models, combining CAR-T cell therapy with targeted modification of the gut microbiome led to improved tumor control and longer survival. CAR-T cell therapy is a modern form of immunotherapy in which a patient’s own immune cells are engineered to specifically attack cancer cells.

Data from hundreds of patients 

As part of METRICs, samples from around 400 cancer patients are being analyzed at three study centers. Using advanced analytical methods, researchers can measure thousands of metabolites and genes simultaneously. This allows them to identify changes in the body that determine whether a therapy is effective. The aim is to develop new treatment strategies that can be tested in clinical trials. In the long term, the goal is more personalized cancer medicine – therapies tailored more precisely to individual patients.

Researchers worldwide are now intensively studying how the microbiome influences the course of cancer. Early findings suggest that gut bacteria can play a key role in the success of immunotherapies. The METRICs project goes one step further by examining the microbiome, metabolism and therapy response together. At the same time, the research is still at an early stage. Only clinical studies will show whether these findings can be translated into new treatments for patients.

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