Causes of Death in Elderly: What Autopsies Reveal
Summary of the Article: Challenging the Concept of “Old Age” as a cause of death
This article details a compelling argument, presented by two scientists from the German center for Neurodegenerative diseases, that the commonly held belief in “old age” as a primary cause of death is fundamentally flawed and has misdirected aging research for decades.
Key Arguments & Findings:
* Autopsies Reveal Specific Causes: Extensive autopsy studies on both humans and animals consistently demonstrate that death is attributed to specific diseases or organ failures, not a generalized “aging process.” Even in healthy centenarians, identifiable pathologies are found.
* “Old Age” is a Label,Not a Cause: The authors contend that “old age” functions more as a descriptive label than a true medical cause of death.
* Cardiovascular Disease Dominates in Humans & Primates: Human autopsy data reveals cardiovascular diseases (myocardial infarction, cardiopulmonary failure, cerebrovascular injuries) are responsible for the vast majority of deaths across age groups, including the very old. This pattern extends to non-human primates.
* Species-Specific Vulnerabilities: Different species exhibit distinct primary causes of death. While cancer is prevalent in mice, cardiovascular disease dominates in humans and primates, intestinal issues in flies, and pharyngeal infections in worms.
* Implications for Aging Research: This species-specificity creates a important challenge for translating aging research findings. Interventions that extend lifespan in mice by targeting cancer may not be relevant to humans, who primarily die from cardiovascular issues.
* Questioning “Hallmarks of Aging”: The article suggests that even influential frameworks like the “hallmarks of aging” might potentially be built on a flawed premise – the idea that aging itself is a primary driver of disease, rather than a backdrop against which specific diseases manifest.
In essence, the authors advocate for a shift in focus from trying to “slow aging” to understanding and preventing the specific diseases that lead to death in different species, including humans. They emphasize the crucial role of autopsies in accurately determining the cause of death and correcting misperceptions.