Scientists have unveiled a sweeping digital atlas of the human proteome, analyzing over 13,000 proteins from 2,856 samples across 58 tissue types, spanning fetal development, healthy adulthood, and more than 25 cancer types. The study, published in Nature, used data-independent acquisition mass spectrometry to map protein activity in four physiological states: fetal, healthy adult, tumor, and adjacent non-tumor tissue.
The atlas reveals striking spatial patterns: proteins linked to RNA splicing decline from fetal to tumor states, while immune-response proteins increase, suggesting that cancer hijacks developmental programs. Researchers identified 41 tumor-enriched proteins with minimal off-target effects, offering high-confidence therapeutic targets. They also uncovered opportunities for drug repurposing, including new uses for existing anticancer therapies in under-treated tumor types.
By integrating drug sensitivity and gene essentiality data, the team prioritized targets such as receptor tyrosine kinases. Although limitations exist-including uneven donor ages and small sample sizes for some cancers-the authors view the resource as a foundational step toward a digital navigator of the human body, capable of accelerating precision medicine and smarter drug development.