ArticleInternational journal of molecular sciences2026
System-Level Identification of Heat Stress-Responsive Pathways in Human Saliva.
Article in International journal of molecular sciences, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Environmental heat stress disrupts cellular homeostasis through coordinated molecular responses involving protein quality control, oxidative stress regulation, inflammatory signaling, and water homeostasis. Although saliva plays an essential role in maintaining oral homeostasis, the molecular pathways underlying salivary adaptation to heat stress remain insufficiently characterized. We hypothesized that integrating the human salivary proteome with systems biology approaches would identify a reproducible heat-stress-responsive molecular signature. Human salivary proteomic datasets retrieved from the Human Salivary Proteome Wiki were integrated into a non-redundant dataset comprising 15,594 protein accessions corresponding to 2540 distinct proteins. Following deduplication, functional annotation, and biological curation, proteins associated with heat stress response, oxidative stress regulation, inflammatory signaling, water homeostasis, salivary secretion, and mucosal protection were assembled into a Salivary Climate Stress Panel (SCSP). Protein-protein interaction and functional enrichment analyses were performed, and the biological relevance of the identified proteins was independently evaluated using a human heat stress transcriptomic meta-analysis comprising 322 comparisons and the GEO dataset GDS3004. Functional filtering identified 2050 heat-stress-associated salivary proteins, from which a curated SCSP of 35 proteins was established. Network analysis identified HSP90AB1, HSP90AA1, and IL1B as the principal hub proteins linking heat stress, oxidative stress, inflammatory signaling, and water homeostasis pathways, while transcriptomic validation confirmed consistent activation of representative SCSP genes under heat stress conditions. These findings provide a reproducible systems-level framework for investigating heat-stress-responsive molecular pathways in the human salivary proteome and support future studies on salivary biomarkers of environmental heat exposure.
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