Brain cells meant to protect us may be fueling cognitive decline

Scientists have uncovered a surprising cause of age-related cognitive decline involving brain cells previously thought to be entirely beneficial. As these cells become dysfunctional, they can produce abnormal amounts of myelin, disrupting nerve fibers and potentially contributing to worsening memory and thinking skills. Brain cells meant to protect us may be fueling cognitive decline.

Scientists have discovered that cells responsible for maintaining the protective coating around nerve fibers can become dysfunctional with age, potentially contributing to the gradual loss of memory and thinking abilities. The research, published in Nature Medicine, challenges the long-held belief that these cells are always beneficial. By examining human brain tissue and conducting experiments in mice, researchers found evidence that problems with these normally supportive cells can damage nerve fibers and interfere with cognitive function.

The discovery also points to a possible new approach for protecting the aging brain. Drugs that act on the biological pathway involved are already being used to treat other neurological conditions, raising hopes that existing treatments could eventually be adapted to combat age-related cognitive decline. Scientists Discover Changes in the Aging Brain The study was led by researchers from the University of Edinburgh and the UK Dementia Research Institute, who investigated how changes in the brain relate to declining cognitive abilities later in life.