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Forever Young?

A new study in PLoS Genetics has linked epigenetic changes to the aging process, says New Scientist. King's College London researchers studied the DNA of 86 sets of twins, and found signs of methylation in 490 genes linked to aging. "These genes were more likely to be methylated in the older than the younger [sets of] twins," study author Jordana Bell tells New Scientist. This suggested to the researchers that those epigenetic changes may contribute to aging, and that they might be reversible. "The next challenge is to establish when gene methylation occurs. It can be triggered through lifestyle factors such as smoking, and environmental stresses," New Scientist adds. "It may one day be possible to develop enzymes that can remove the offending molecules from DNA and reverse methylation — and some aspects of aging."

The Scan

Missed Early Cases

A retrospective analysis of blood samples suggests early SARS-CoV-2 infections may have been missed in the US, the New York Times reports.

Limited Journal Editor Diversity

A survey finds low diversity among scientific and medical journal editors, according to The Scientist.

How Much of a Threat?

Science writes that need for a provision aimed at shoring up genomic data security within a new US bill is being questioned.

PNAS Papers on Historic Helicobacter Spread, Brain Development, C. difficile RNAs

In PNAS this week: Helicobacter genetic diversity gives insight into human migrations, gene expression patterns of brain development, and more.