In 223,051 men from the UK Biobank, mosaic loss of chromosome Y in blood cells independently predicted incident age-related macular degeneration, with risk escalating beyond a defined threshold of clonal burden. Plasma proteomic shifts appeared up to 15 years before diagnosis, and single-cell data localized the highest Y-loss frequencies to CD16+ monocytes and choroidal macrophages displaying a pro-inflammatory phenotype. A machine learning model built on these protein signatures predicted five-year incident risk with an AUC of 0.734.
Key Points
- Blood-cell chromosome Y loss independently predicted incident macular degeneration
- MMP-12 and 40 other proteins diverged up to 12 years pre-diagnosis
- Y-deficient monocytes and macrophages mediated risk via inflammatory signaling
Longevity Analysis
Clonal mosaicism in the blood behaves as an upstream driver of organ-specific degeneration rather than a passive marker of chronological age, with immune cells carrying the mutation into tissue and reshaping local inflammatory tone. The decade-plus proteomic lead time positions this as a tractable window for surveillance in men, where monocyte counts, matrix-degrading enzyme activity, and clonal burden can be read as early signals long before vision changes appear. Interventions that reduce inflammatory load and support immune cell quality become relevant well before symptoms declare themselves, shifting attention from late-stage retinal treatment to systemic maintenance.
Original published by Wiley Aging Cell, by Tianhao Chen, Zhaoyu Xiang, Zhe Zhang, Bingqing Sun, Xuan Ding, Liyin Wang, Yunqian Yao, Zhuotong Wu, Siyang Liu, Yuan Lei, Xingtao Zhou, Jing Zhao .