Aubrey de Grey

Background

Aubrey de Grey is a British biogerontologist and one of the most vocal advocates for treating human aging as an engineering problem that can be repaired. He is best known for SENS, or Strategies for Engineered Negligible Senescence, a framework that classifies aging into seven categories of accumulated cellular and molecular damage, and for popularizing the concept of longevity escape velocity. A former computer scientist who became largely self-taught in biology, he has spent decades arguing that medicine could keep people healthy indefinitely by periodically repairing the damage of aging. Born in London, he studied computer science at Cambridge and worked in artificial intelligence and software before turning to the biology of aging in the 1990s, receiving a Cambridge PhD in 2000 on the basis of his published work. In 2003 he co-founded the Methuselah Foundation with David Gobel, which created the Mprize to reward researchers for extending the lifespan of mice.

SENS and repairing damage

De Grey's signature idea is that aging is the lifelong accumulation of a limited set of types of damage, each of which could in principle be repaired or rendered harmless. Rather than trying to slow metabolism, the SENS approach proposes periodic maintenance that keeps damage below the level at which it causes disease. He organizes this damage into seven categories, spanning cell loss, cancerous cells, mitochondrial mutations, lingering senescent cells, crosslinks that stiffen tissues, and aggregates that build up inside and between cells, each paired with a proposed repair such as stem cell therapy, immune clearance, or senolytics. The framework overlaps with the mainstream hallmarks of agingArticleHallmarks of AgingA shared framework that organizes aging into interconnected biological processes, giving longevity research a common map of what to measure and target.Read entry →, though de Grey developed his list independently and frames it around repair rather than description. Among the seven, clearing senescent cells with senolytics has advanced furthest toward the clinic.

Foundations and research

In 2009 de Grey helped establish the SENS Research Foundation in California, which funded and conducted rejuvenation research and trained scientists, and where he served as chief science officer, funding much of its early work with a large personal inheritance. In 2021 the foundation removed him following allegations of misconduct and concerns that he had interfered with an internal investigation, which he denied. The following year he founded the Longevity Escape Velocity Foundation, which he leads and which runs the Robust Mouse Rejuvenation study, testing combinations of interventions in aged mice. He is also the leading popularizer of longevity escape velocity, the idea that once rejuvenation therapies extend healthy life faster than time passes, a person could stay ahead of their own aging indefinitely.

Reception

Reactions to de Grey range from admiration to sharp skepticism. Supporters credit him with reframing aging as a tractable target and with helping legitimize aging biology as a field for serious investment. Critics, including some mainstream gerontologists, have argued that parts of the SENS program are speculative and that his timelines are overly optimistic. A widely noted mid-2000s exchange in the MIT Technology Review captured the divide, with several biologists disputing the feasibility of his proposals while acknowledging his role in provoking useful debate. Even critics generally agree that he has been influential in pushing the idea that aging itself, rather than any single disease, is the right target for medicine.

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• Peter Diamandis