ArticleInternational journal of molecular sciences2026
circRNA-Associated ceRNA Regulatory Networks in Cardiac Responses to High-Altitude Hypoxia in Tibetan Pigs (
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
High-altitude hypoxic adaptation in mammals involves complex molecular mechanisms, with non-coding RNAs (ncRNAs) increasingly reported to participate in hypoxia-related regulation. However, the contribution of circRNAs in cardiac adaptation to chronic hypoxia remains largely unexplored. This study performed an integrative competitive endogenous RNA (ceRNA) analysis to investigate circRNA-mediated regulatory networks in the hearts of Tibetan pigs and Yorkshire pigs maintained under high- and low-altitude conditions, using four comparison groups (TH, TL, YH, and YL). Using Ribo-Zero RNA sequencing, we identified 961 circRNAs in heart tissues, with 358 differentially expressed circRNAs (DE-circRNAs) detected across the four groups. Functional enrichment analysis revealed that their host genes were associated with hypoxia-related pathways, including HIF-1, VEGF, AMPK, and autophagy, critical for energy metabolism and mitochondrial function. A HIF-1-specific ceRNA network was constructed, identifying key axes including circDUSP16-ssc-miR-671-5p-
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