Poorer kids likelier to catch colds
Washington: Researchers have found a link between lower socio-economic status during childhood and adolescence and the length of telomeres - protective cap-like protein complexes at the end of chromosomes, which ultimately affects the susceptibility to colds in middle-aged adults.
The study showed that kids and teens with parents of lower socio-economic status have shorter telomeres as adults.
Telomere length is a biomarker of aging with telomeres shortening with age. As a cell's telomeres shorten, it loses its ability to function normally and eventually dies.
Having shorter telomeres is connected to the early onset of illnesses such as cardiovascular disease and cancer, with mortality in older adults and, as CMU's Sheldon Cohen first discovered, predicts susceptibility to acute infectious disease in young to midlife adults.
Cohen, the Robert E. Doherty Professor of Psychology in CMU's Dietrich College of Humanities and Social Sciences, said that this provides valuable insight into how our childhood environments can influence our adult health.
In the study, Cohen and his team measured the telomere lengths of white blood cells from 152 healthy volunteers between the ages of 18 and 55.
To gauge childhood and current socio-economic status, the participants reported whether they currently own their home and whether their parents owned the family home when they were between the ages of 1 and 18.
They were then exposed to a rhinovirus, which causes a common cold , and quarantined for five days to see if they actually developed an upper respiratory infection.
The results showed that participants with lower childhood socio-economic status - indicated by fewer years that their parents were homeowners - had shorter than average telomere length.
Telomere length decreased by 5 percent for each year the participants' parents did not own a home.
The researchers also found that parental homeownership in both early childhood and adolescence were both associated with adult telomere length.
The study has been published in journal Brain, Behavior and Immunity.
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