The study analyzed data from 1,215 American adults in the Midlife in the United States (MIDUS) study and used blood samples to measure four molecular markers of cellular aging. Common measures included CDKN2A RNA abundance, DNA damage response, and senescence-associated secretory phenotypes. CDKN2A RNA is involved in stopping cell division.
Researchers assessed neighborhood opportunity with the Childhood Opportunity Index 3, which combines 44 location-specific measures across three areas: education, health and environment, and social and economic resources. They found that people living in low-opportunity neighborhoods had significantly higher CDKN2A RNA levels.
This association remained after accounting for other socioeconomic, health, and lifestyle factors, and it was strongest for social and economic neighborhood factors. The authors suggest that chronic stress from economic deprivation and limited mobility may drive cellular aging.
Difficult words
- marker — a measurable sign used to show a conditionmolecular markers
- cellular — related to the cells of a living bodycellular aging
- abundance — a large amount or high level of something
- assess — to measure or judge the size or qualityassessed
- neighborhood — the area near where people liveneighborhoods
- socioeconomic — relating to both social and economic factors
- deprivation — the lack of basic material and economic resources
Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.
Discussion questions
- Have you noticed differences in social and economic resources between neighborhoods where you live? How can those differences affect people’s daily lives?
- What local changes could improve opportunity in low-opportunity neighborhoods?
- Why might limited mobility increase stress for people living in areas with few economic resources?
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