The seven causes of ageing are not all equally important. Death resistant cells are more important to ageing than some other causes, because these ‘undead’ cells start misbehaving in ways that boost the other causes of ageing. Their behaviour increases the chance of neighbouring cells becoming cancerous, the formation of extracellular protein aggregates and causes the immune system to become desensitized and less effective.
Most treatments to address these cells focus on pushing them over the edge, causing them to be cleaned up by the immune system. Some treatments are looking into modifying their behaviour to be less problematic.