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Common drug linked to hampering lung cancer treatment


According to a new research by the Flinders University, a common medicine that treats reflux, heartburn as well as ulcers can hinder the effectiveness of lung cancer immunotherapy medicines. The findings of this research were published in the ‘British Journal of Cancer’.

The study investigated the impact of proton pump inhibitors (PPIs) on patients undergoing treatment for non-small-cell lung cancer, the most common type of lung cancer, accounting for 85 per cent of cases. Patients received either chemotherapy or were treated with a combination of chemotherapy and atezolizumab, an immune checkpoint inhibitor drug, designed to boost the immune system into killing cancer cells.

The researchers found PPI use was associated with worse survival in patients with advanced cancer treated with atezolizumab plus chemotherapy, but not in those that received chemotherapy alone, with the study showing PPI use was linked to a significant decrease in the benefit of the immune therapy treatment. Lead author Dr Ash Hopkins from the Flinders Health and Medical Research Institute said it’s important the impacts of PPIs are well understood.

“Stomach issues and reflux are common in cancer patients so the use of antacids and PPIs is common. Approximately 30 per cent of cancer patients use them, and usually for extended periods of time,” says Dr Hopkins, an NHMRC Investigator Fellow and leader of the Clinical Cancer Epidemiology Lab at Flinders University,” Hopkins said. “Of concern is that the medication is often overused, or used inappropriately, as it is seen to cause little harm, however, our research could indicate a need to change this approach,” Hopkins added.

PPIs treat a number of stomach issues by reducing acid production in the wall of the stomach, with types and brands including esomeprazole (Nexium, Dexilant), lansoprazole (Zoton, Zopral), omeprazole (Losec, Maxor), pantoprazole (Somac, Ozpan) and rabeprazole (Parbezol, Pariet). Recent studies showed the medication can cause significant gut microbiota changes, which could lead to its impact on cancer immunotherapy.

“Immune checkpoint inhibitor (ICI) drugs help the immune system by switching on T-cells, allowing them to kill or control cancerous tumours, but the gut microbiota also plays an important role in regulating our body and its immune function,” Hopkins said. “When this gut microbiota is impacted it can stop the ability of ICIs to activate the immune system, meaning the drugs simply won’t work as well to fight off cancer,” Hopkins added.

While further studies are needed, the researchers said it could be time for oncologists to reconsider the indiscriminate use of PPIs for their patients. “With increasing evidence, this impact is seen across different cancer types, as well as the growing use of PPIs around the world, there is an urgent need to conclusively determine how PPIs are affecting cancer treatment, but the signs are certainly there,” Hopkins said. (ANI)

(This story has not been edited by Devdiscourse staff and is auto-generated from a syndicated feed.)



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