A new research perspective published in Volume 18 of Aging on July 24, 2026, examines the historical development and future directions of the hyperfunction theory of aging. The article, written by João Pedro de Magalhães from the Genomics of Ageing and Rejuvenation Lab at the University of Birmingham, reviews evidence supporting programmatic mechanisms driving human aging and discusses how these insights could influence future research.
The perspective does not present new experimental findings but instead explores how theories about aging have evolved over time. For decades, most researchers have believed that aging is primarily caused by molecular damage such as DNA damage, oxidative stress, mitochondrial dysfunction, and protein deterioration. In contrast, the hyperfunction theory suggests that developmental and growth programs—beneficial early in life—continue to operate beyond their intended period and contribute to age-related decline.
Magalhães traces these ideas from nineteenth-century theories through key developments such as Clive McCay's caloric restriction experiments and George Williams' antagonistic pleiotropy concept. Special attention is given to Mikhail Blagosklonny's contributions; his hyperfunction theory proposes that "quasi-programs," or developmental processes failing to switch off after their biological role ends, are central to understanding why organisms age. The author writes that this framework offers a mechanistic explanation linking evolutionary biology with many observed features of aging.
The article also reviews experimental data supporting programmatic theories. Findings include studies where single-gene manipulations extend lifespan in animal models; evidence that reduced growth hormone or insulin-like growth factor-1 (IGF-1) signaling slows mouse aging; and results showing rapamycin extends lifespan by inhibiting TOR signaling. Caloric restriction is discussed as an intervention whose effects align more closely with regulated biological processes than with simple molecular damage accumulation. However, Magalhães acknowledges that molecular damage still contributes significantly to diseases like cancer and likely interacts with programmatic mechanisms during aging.
Looking forward, the perspective highlights several research avenues for distinguishing between competing theories of aging. Studying developmental biology alongside gerontology may clarify how genetic programs governing growth also drive functional decline later in life. Emerging rejuvenation approaches—including partial cellular reprogramming—are discussed as tests for the hyperfunction theory because they aim to reset biological age via gene regulation changes rather than repairing accumulated molecular damage alone.
"The hyperfunction framework developed by Blagosklonny, and the elegant term hyperfunction itself, provide a powerful and underappreciated lens through which to understand aging," Magalhães writes. He concludes that further experimental work will be needed to define these mechanisms fully, but suggests integrating genetics, epigenetics, regenerative medicine, and developmental biology will be essential for advancing longevity research.
