Aging and the Role of Necrosis
Aging has often been characterized as a slow, inevitable decline. Yet, recent research indicates that there could be a pivotal point within our cellular processes—something that might be altered, paused, or even undone. This critical process is necrosis, a type of uncontrolled cell death.
A study conducted by researchers at University College London, LinkGevity, and the European Space Agency highlights necrosis as central to aging and disease. The findings suggest that necrosis may be more than merely a result of damage; it could actually be a contributing factor.
Necrosis as the Aging Trigger
Necrosis is an uncontrolled cell death that arises from stress, infection, or injury—contrary to apoptosis, which is the regulated way cells die and helps keep organs functioning well. When necrosis occurs, it can harm nearby tissues and incite inflammation. The researchers argue that necrosis might not just mark the end of cell life but could actively drive aging and chronic disease.
Dr. Keith Siew from UCL’s Centre for Kidney & Bladder Health remarked, “Nobody really likes talking about death, including cell death, which is perhaps why we know so little about the physiology of it. Essentially, if enough cells die, tissues die, leading to our own demise. The question is, what if we could pause or halt necrosis?”
Chaotic Cell Death and Its Implications
Every living organism is built from cells, and while cell death is a necessary aspect of life, it needs to occur in a controlled manner. In well-functioning systems, cells are systematically renewed. However, necrosis occurs without order. Cells burst and release their contents into the surrounding area, causing inflammation and hastening the aging process.
Dr. Carina Kern, study lead and LinkGevity CEO, stated that necrosis remains largely unexamined within medicine. It’s a unifying factor in aging, diseases, and the evolution of scientific knowledge itself.
The Role of Calcium Imbalance
Calcium imbalance is a major factor in necrosis. Typically, cells have much higher levels of calcium outside their membranes than inside. This difference is essential for cell regulation. When calcium surges into cells, they collapse, releasing toxins and promoting inflammation. Dr. Siew added, “When cells die, it’s not always a quiet affair for neighboring cells.”
Connections to Chronic Diseases
Necrosis sets into motion a domino effect. The released toxic materials impact nearby cells, leading to further death and escalating inflammation. Over time, the body’s repair mechanisms falter. The study illustrates links between necrosis and numerous chronic diseases like Alzheimer’s, heart disease, and kidney failure—conditions often viewed as separate but share this commonality.
Dr. Kern pointed out that necrosis has been overlooked as merely an endpoint of cell death. But mounting evidence indicates it’s a vital mechanism through which systemic deterioration occurs and spreads. The potential to target necrosis could open up entirely new avenues in treating diseases ranging from kidney failure to cardiac issues and aging itself.
Necrosis and Kidney Health
Of all organs, the kidneys appear to be severely affected by necrosis. They filter blood and regulate fluid levels, but these functions decline with age. Almost half of those over 75 exhibit kidney disease. The study discusses how necrosis primes this decline, with stressors like low oxygen and toxin accumulation significantly contributing. Once initiated, it creates a feedback loop that’s difficult to interrupt.
Dr. Siew pointed out that kidney failure doesn’t stem from just one issue—it’s multifaceted, involving a variety of stressors that ultimately lead to necrosis and accompanying cycles of decline.
Aging Beyond Earth
The repercussions of necrosis extend beyond our planet. In space, astronauts are subjected to environments that accelerate aging. Low gravity and cosmic radiation put immense strain on the body, leading to muscle atrophy, weakened bones, and organ failures at a faster rate than on Earth.
In 2024, Dr. Siew participated in a study identifying the human kidney as particularly vulnerable during space travel, with necrosis being a key factor. The body’s failure to cope with stressors in space could jeopardize long-term missions.
Professor Damian Bailey, a physiology and biochemistry expert, noted that addressing necrosis could not only enhance longevity on Earth but also advance space exploration initiatives. In space, the conditions that exacerbate aging on Earth are intensified by factors like cosmic radiation and microgravity.
Combatting Cell Death for Recovery
Necrosis in crucial organs creates damage cycles that hinder healing and diminish recovery. Dr. Kern explained that in many age-related illnesses affecting various organs, unending necrosis cascades propel disease progression alongside impaired healing, resulting in fibrosis and inflammation. Each cycle amplifies the next.
“If we could stave off necrosis, even just temporarily, we could halt these destructive loops at their origin, allowing normal cell functions and regeneration to resume,” Dr. Kern added.
This study is featured in the journal Oncogene.
