ArticleScientific reports2026
Transcriptional mechanisms of hearing acclimatization to high altitude in rats.
Article in Scientific reports, 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
To investigate auditory acclimatization to high-altitude hypobaric hypoxia, we conducted longitudinal transcriptomic analyses in Wistar rats rapidly transported from 500 m to 3,700 m. Auditory brainstem response (ABR) testing and hematoxylin and eosin staining revealed progressive changes, with hearing impairment at 30 days (D30) followed by acclimatization at 60 days (D60). RNA-seq of cochlear tissues identified 1,329 differentially expressed genes (DEGs) during impairment and 1,441 DEGs during acclimatization. STEM analysis linked these temporal patterns to specific biological processes: peripheral nervous system development (acclimatization) and myotube differentiation (impairment), as annotated by GO/KEGG and Metascape. STEM analysis revealed gene expression profiles that significantly correlated with ABR threshold shifts, encompassing biological processes such as sensory organ morphogenesis and gravity-sensing pathways. Subsequent validation through RT-PCR and immunofluorescence staining confirmed the involvement of key candidate genes, including morphogenesis-associated factors (Aqp1, Rbp4), the mechanosensitive hormone Bglap, and critical transcriptional regulators (Maz, Tfap4, Nf1) in the acclimatization response. This study elucidates key transcriptional mechanisms governing both the initial hearing impairment and subsequent acclimatization processes during high-altitude adaptation.
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