OncoHost Publishes Study Enabling Integration of Serum and Plasma Proteomic Data

OncoHost announced the publication of a new study in the Journal of Pharmaceutical and Biomedical Analysis (JPBA), titled "Bridging the Gap: A Systematic Approach to Integrating Serum and Plasma Proteomic Datasets for Biomarker Studies." The study introduces a validated computational framework that harmonizes serum and plasma proteomic datasets—specimen types historically considered analytically non-comparable due to biological and pre-analytical differences.

By overcoming this long-standing barrier and technical divide, the framework allows researchers to combine heterogeneous cohorts, accelerating biomarker discovery and validation efforts. The approach enhances both the analytical depth and translational applicability of proteomic research while creating new flexibility in sample utilization.

The multi-institutional collaboration included leading researchers from the National Cancer Institute (NCI), Yale School of Medicine, Heidelberg University Hospital, and biomarker development company ions.bio, alongside the OncoHost scientific team.

Serum and plasma are widely used in clinical research and biobanking; however, differences in sample preparation result in proteomic variations that have limited direct comparison and data integration across specimen types. Consequently, large retrospective cohorts derived from each specimen type have often been analyzed separately.

In this study, researchers performed high-throughput proteomic profiling of 7,289 proteins using the SomaScan® platform on 177 matched serum–plasma sample pairs from cancer patients across three independent cohorts. Remarkably, 91.6% of proteins demonstrated statistically significant correlation (p < 0.05) between serum and plasma. Using matched sample pairs, the team derived linear scaling factors that were consistent across cohorts, supporting the generalizability and robustness of the bridging methodology.

The study validated the bridging strategy using OncoHost's PROphet® platform—an AI-powered, plasma proteomics-based model designed to predict immunotherapy outcomes in patients with non-small cell lung cancer (NSCLC). When applied to scaled serum proteomic measurements, the PROphet model maintained predictive accuracy. Clinical benefit classification and survival stratification derived from transformed serum data were comparable to those generated from plasma, confirming preservation of the underlying biological signal.

Beyond immediate dataset alignment, the study provides a structured methodology for future sample-type standardization, including compatibility across tube types and biological matrices. Enabling cross-specimen comparability may unlock valuable serum-based cohorts for discovery and validation initiatives.

As proteomics become increasingly central to precision oncology, systematic standardization approaches such as this will be essential to advancing reproducible and scalable biomarker development.

OncoHost is a technology company headquartered in Binyamina, Israel, and Cary, North Carolina, transforming the approach to precision medicine for improved patient outcomes.