SuperAgers’ brains resist changes typical of Alzheimer’s, American research shows
Adultos over 80 years old maintain performance in memory tests comparable to that of individuals aged 50 or 60 years old. The phenomenon occurs in a rare group called SuperAgers. Pesquisadores of Universidade Northwestern has been following these cases for over 25 years.
The program identified biological and behavioral traits that differentiate these individuals. Alguns brains resist the formation of plaques and tangles associated with Alzheimer. Outros produce these proteins but continue to function without cognitive impairment.
Programa accumulates data spanning almost three decades
The study began in the late 1990s on Centro Mesulam of Neurologia Cognitiva and Doença of Alzheimer. Desde 2000, around 290 people participated in the annual assessments.
Cientistas examined 77 brains donated after the volunteers’ deaths. The results appear in a perspective article published in Alzheimer’s & Dementia magazine. The text marks the program’s 25th anniversary and is part of a special edition on advances in Alzheimer research.
SuperAgers score at least 9 out of 15 on delayed word recall tests. Esse index is equivalent to the average performance of adults between 56 and 66 years old. The average for people over 80 years old is usually around 5 words.
- Annual Testes measures episodic memory consistently.
- Avaliações include cortical volume and thickness in specific regions.
- Análises post-mortem checks presence of amyloid and tau proteins.
- Entrevistas records social habits and personality of participants.
- Doações brains allow direct comparison with typical elderly brains.
Brain Estrutura shows striking differences
The cortex of many SuperAgers shows little or no thinning, unlike what occurs in common aging. In some cases, the anterior cingulate cortex is thicker than that seen in younger adults. Essa region relates to decisions, emotions and motivation.
Larger entorhinal Neurônios appear frequently in this group. Eles contribute to memory processes. Além In addition, there is a greater number of von Economo neurons, linked to social behavior.
Recent Estudos indicate that SuperAgers generate more new neurons in the hippocampus. Associated research, with the participation of scientists from Northwestern, showed production between two and two and a half times higher than that of healthy elderly people or those with Alzheimer.
Esses findings suggest greater brain plasticity even in advanced age. The analysis combined data from multiple centers and methods such as single nuclear RNA sequencing.
Estilo of life reveals common thread
Most participants maintain strong social ties. Eles describe themselves as outgoing and sociable. Exercise and eating habits vary among individuals.
Pesquisadores observe that close contact appears recurrently. Essa characteristic arises independently of other health factors.
The program continues to recruit volunteers. Those interested undergo initial memory tests. Quem meets criteria enters longitudinal follow-up.
Brain Doações Drives Discoveries
Voluntários may choose to donate their brain for scientific analysis after death. Essas samples allowed us to identify two main mechanisms.
One involves resistance to plaque and tangle production. The other demonstrates resilience: proteins appear but do not affect cognitive function.
Cientistas highlight the role of donations in understanding long-term processes. A co-author mentioned that results often emerge years after the donor’s death.
Implicações for future interventions
The findings pave the way for strategies that aim to increase brain resilience. Pesquisadores seek to translate the observed patterns into preventive approaches against cognitive decline.
The article reinforces that cognitive aging does not follow a single path. Alguns individuals maintain high performance for decades beyond expectations.
The work brings together contributions from Sandra Weintraub, Tamar Gefen, Changiz Geula and M. Marsel Mesulam, among others. The program remains active and inspires similar initiatives in other countries.
