New research shows that chronic stress suppresses the immune system’s response to cancer, reducing the effectiveness of immunotherapy treatments.

University of Queensland scientists say they are investigating dual therapies for patients to reduce stress signalling and improve their response to treatments.

UQ Diamantina Institute researcher Dr Stephen Mattarollo said lymphoma progressed more rapidly in mouse models when stress pathways were induced to reflect chronic psychological stress.

“When we used immunotherapies on these mice they were not able to respond as effectively as those which had not been stressed,” Dr Mattarollo said.

“This is because the stress led to poor function against the cancer by T-cells, which are very important in the immune system’s control and surveillance of tumours and are a major target in many immunotherapy treatments.”

Dr Mattarollo said increased anxiety was natural with a cancer diagnosis, and it should be managed to ensure the best possible outcome for patients.

“Absolutely there is now pre-clinical evidence to suggest that treatments and lifestyle interventions to manage or reduce stress levels will improve the chances of these patients responding to therapies,” he said.

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