Cosmael Science Web Article | April 2025

Understanding what’s in our blood has long been the holy grail of modern diagnostics. Now, an international team of scientists has delivered a monumental leap in that quest with the release of the Human Plasma Proteome Atlas—a groundbreaking map that links thousands of proteins in our blood to the tissues they came from. This offers a powerful new tool to track organ health and detect disease early, all from a simple blood test.

Published in Cell (March 2025) by Erik Malmström, Lars Malmström, Johan Malmström, and colleagues, the study establishes an integrated, multi-atlas resource that systematically links proteins circulating in plasma to their source organs and cell types. This is a milestone in precision biomarker discovery and personalized medicine.

What They Did: Building the Atlas

Using mass spectrometry on samples from 21 human tissues and 8 major blood cell types, the team generated over 10,000 protein profiles. They then merged this with publicly available RNA and protein expression atlases, crafting a Global Label Score (GLS) for each protein—a statistical confidence measure of tissue specificity.

With this, the researchers could finally say: “This protein likely came from your heart,” or “That one from the pancreas.” Previously, these associations were speculative or limited to a handful of known markers like troponin (heart) or amylase (pancreas).

Why It Matters: Beyond Biomarkers

This isn’t just a map—it’s a dynamic diagnostic lens.

When applied to real patient data, the atlas revealed tissue-specific changes in disease:

• In pancreatitis, proteins like pancreatic lipase and carboxypeptidase B1 spiked, clearly reflecting tissue damage.

• In myocardial infarction, heart-specific proteins such as myoglobin and FABP3 were elevated.

• In bacterial infections, neutrophil-derived proteins increased, while platelet proteins dropped—matching clinical patterns seen in sepsis.

This tissue-informed blood analysis enables a multi-organ “liquid biopsy” approach, potentially allowing doctors to detect and localize damage or inflammation long before symptoms appear.

Key Innovations

• GLS Labeling System: Confidently ties plasma proteins to tissues using integrated RNA/protein data.

• Disease Application: Demonstrated utility across patient cohorts—heart attack, pancreatitis, sepsis, and infections.

• Resource Access: Open data via atlas.txms.org and GitHub codebases allow global scientists to build on this work.

Cosmael ThinkLab Commentary

This study is a paradigm shift in our ability to non-invasively monitor the body. It bridges systems biology, omics integration, and translational medicine—laying the groundwork for a new class of organ-specific blood diagnostics. At Cosmael ThinkLab, we see this as a cornerstone for future digital twins, AI-driven health analytics, and personalized disease prediction models.

Source: Malmström, E., Malmström, L., Hauri, S., et al. (2025). Human proteome distribution atlas for tissue-specific plasma proteome dynamics. Cell. https://doi.org/10.1016/j.cell.2025.03.013