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Recent studies in animals (including humans) have shown that certain biological interventions might slow the aging process. A new study suggests that at least some aspects of the aging process also might be reversible in humans.
DNA methylation (DNAm) clocks currently are the gold standard for determining biological age. Investigators used DNAm clocks to study aging in mice. The blood vessels of young mice were surgically connected to the blood vessels of old mice for 3 months, and then disconnected. Exposure to the blood of old mice caused the organs of the young mice to age dramatically. When the joined blood supplies were disconnected, the organs of the young mice became biologically younger.
The investigators then conducted studies in hum…