Linking The Exposome To Frailty: Pathways, Mechanisms, Clinical Implications, And Prevention
Have you ever wondered why some people age more gracefully than others, even with similar genetic backgrounds? It turns out that our lifelong exposure to a multitude of environmental factors plays a crucial role in how vulnerable we become to health decline as we get older. This collection of non-genetic influences, from the air we breathe to our social interactions, is called the “exposome.”
Recent research highlights that this exposome significantly impacts frailty, a state of increased vulnerability to stressors that can lead to falls, disability, and other adverse health outcomes. The study reveals that factors like socioeconomic disadvantages, feelings of loneliness, and social isolation can heighten the risk of becoming frail. Similarly, unhealthy dietary patterns, a lack of physical activity, exposure to air pollution, and even certain infections contribute to this vulnerability.
On the flip side, engaging in physical activity, adopting high-quality dietary patterns such as a Mediterranean-style diet, and living in green, walkable environments can act as protective factors, promoting healthier aging. The research also delves into the internal biological processes that connect these external exposures to frailty, including chronic inflammation, issues with cellular energy production (mitochondrial dysfunction), imbalances in hormones and metabolism, disruptions in gut bacteria, and changes in how our genes are expressed (epigenetic aging).
Understanding these connections means that healthcare can evolve to better prevent frailty. This involves not only assessing an individual’s current health but also screening for actionable risks related to their social connections, diet, physical activity levels, exposure to pollution and extreme temperatures, history of infections, vaccination status, and existing chronic diseases. Practical strategies to combat frailty could include “social prescribing” (connecting people to community support), encouraging healthy eating habits, promoting physical activity in clean environments, planning for seasonal health challenges, ensuring up-to-date vaccinations, and optimizing cardiovascular and metabolic health.
Source: link to paper