In a remarkable scientific breakthrough that researchers are calling a ‘eureka moment,’ a team at the University of Cambridge has potentially turned a cheap painkiller into a new weapon to fight against cancer metastasis – aspirin. Aspirin, a common, over-the-counter medication has long been known for its anti-inflammatory and pain-relieving properties. However, this new research suggests it may also play a crucial role in preventing cancer from spreading throughout the body by activating the immune system. This discovery builds upon years of observational studies linking low-dose aspirin to reduced metastasis in some cancers.
Understanding Metastasis: The Driving Force Behind Cancer Deaths

The vast majority of cancer-related deaths – approximately 90% – occur not because of the primary tumour itself, but because of metastasis. This is the process by which cancer cells break away from the original tumour and travel through the bloodstream or lymphatic system to set up secondary tumours in distant organs like the lungs, liver, brain, and bones. Recent advances in immunotherapy, which have tapped into the power of the immune system to fight cancer, have shown promise in treating established metastatic disease. The new research on aspirin suggests that this readily available medication may be one such therapy that could utilize the immune system to tackle cancer metastasis.