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Research on human biological organ aging

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2026-10-04 14:21 UTC → 2026-10-06 10:08 UTC · added ~~removed~~

Scientific research has highlighted the distinction between chronological age and biological age, noting that biological age can vary significantly across different organs and systems within a single individual. A study ~~of over 5,000~~ published in Nature involving 5,676 adults found that nearly one in five people possesses at least one organ that is markedly older than their chronological age. To estimate these differences, researchers use biological clocks—algorithms that analyze DNA, proteins, clinical exams, or medical imaging. One promising method involves measuring specific proteins in blood plasma to identify tissue-specific aging vulnerabilities. Further studies ~~using animal models and epigenetic clocks~~ suggest that an organ’s biological state is modifiable by its physiological environment. ~~For instance,~~ Research led by Jesse Poganik at Harvard University, published as a preprint on bioRxiv, indicates that the biological age of a transplanted heart can shift based on the ~~recipient; hearts from~~ recipient. Using mouse models and human transplant tissue samples, the study observed that when older ~~donors may show~~ donor hearts are transplanted into younger recipients, molecular markers ~~when placed in~~ such as DNA methylation patterns shift toward a younger ~~recipients, while young~~ profile. Conversely, younger hearts ~~may~~ transplanted into older organisms tend to age more ~~rapidly in~~ rapidly. These findings suggest that cellular age is not entirely fixed and could potentially expand the donor pool for heart transplants by allowing for the use of older ~~organisms.~~ organs in younger patients.

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