Researchers identify cellular senescence pathways in network-based analysis of in vitro asbestos exposure

A protein-protein interaction network analysis of crocidolite-exposed lung cells demonstrated significant proximity to lung cancer modules, identifying prioritized hub genes enriched in cellular senescence pathways.

Researchers at the University of Occupational and Environmental Health, Japan, and the Kyushu Institute of Technology utilized a protein-protein interaction (PPI) network-based approach to link in vitro toxin exposure to human disease modules.

Human immortalized type I alveolar epithelial cells were exposed to five doses of crocidolite, a known lung carcinogen, defining an exposure-responsive signature of 253 genes.

Computational evaluation showed significant network proximity (Zc = -2.95) to a lung cancer module of 90 proteins compiled from databases including OMIM and GWAS.

Network propagation analysis recovered lung cancer driver genes with an area under the receiver operating characteristic curve (AUC) of 0.974, with prioritized genes enriched in cellular senescence, apoptosis, and PI3K-Akt signaling pathways.

The analysis identified PARP1, STAT3, MYC, EGR1, CYP1A1, and SMAD3 among the top hub genes.

The study demonstrates the utility of PPI-based computational biology to systematically map early toxicological exposures to human disease-related network modules.

By highlighting cellular senescence as an enriched downstream pathway of crocidolite exposure, the findings suggest that environmental carcinogens may trigger age-related cellular damage mechanisms.

The high performance of the network propagation model (AUC = 0.974) provides a validated computational workflow for identifying disease-relevant hub genes in environmental and occupational toxicology.

While focused on basic toxicology, the study highlights cellular senescence as a key biological node in environmental tissue injury, expanding the theoretical application of senotherapeutics beyond natural aging.

The identification of specific hub genes like STAT3 and PARP1 underlines potential cross-sections between longevity pharmacology and occupational lung disease prevention.

Data indicating cellular senescence enrichment in environmental lung injury support the rationale for exploring senolytic interventions in non-aging-related fibrotic and oncogenic pathologies.

Preclinical studies evaluating whether clearing senescent cells can mitigate asbestos-induced tissue damage or delay associated lung pathologies.