Abstract
While exposure to high levels of all-trans retinoic acid (atRA) during pregnancy is known to suppress murine embryonic palate mesenchymal (MEPM) cells proliferation and to result in cleft palate (CP) development, the underlying mechanisms are poorly understood. Accordingly, this study was designed with the goal of clarifying the etiological basis for atRA-induced CP. A murine model of CP was established via the oral administration of atRA to pregnant mice on gestational day (GD) 10.5, after which transcriptomic and metabolomic analyses were performed with the goal of clarifying the critical genes and metabolites associated with CP development through an integrated multi-omics approach. MEPM cells proliferation was altered by atRA exposure as expected, contributing to CP incidence. In total, 110 genes were differentially expressed in the atRA treatment groups, suggesting that atRA may influence key biological processes including stimulus, adhesion, and signaling-related activities. In addition, 133 differentially abundant metabolites were identified including molecules associated with ABC transporters, protein digestion and absorption, mTOR signaling pathway, and the TCA cycle, suggesting a link between these mechanisms and CP. Overall, combined analyses of these transcriptomic and metabolomic results suggested that the MAPK, calcium, PI3K-Akt, Wnt, and mTOR signaling pathways are particularly important pathways enriched in the palatal cleft under conditions of atRA exposure. Together, these integrated transcriptomic and metabolomic approaches provided new evidence with respect to the mechanisms underlying altered MEPM cells proliferation and signal transduction associated with atRA-induced CP, revealing a possible link between oxidative stress and these pathological changes.
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Funding
This work was supported by the Natural Science Foundation of China (No. 81801547), Key project of science, technology of Henan province (No. SBGJ202102014), Major Projects of Collaborative Innovation of Zhengzhou (No.18XTZX12009), Special Major Public Welfare Project of Henan Province (No. 201300310800) and Key project of science, technology of Henan province (No. 222102310418).
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ZY: Conceptualization, data curation, formal analysis, investigation, methodology, roles/writing—original draft. SS: data curation, data curation, roles/writing—original draft. GW: conceptualization, writing—review and editing. YZ: conceptualization, methodology, visualization. YZ: conceptualization, project administration. YW: validation, visualization, writing—review and editing. HL: supervision, writing—review and editing. YZ: supervision. XL: conceptualization, data curation, funding acquisition, supervision, writing—review and editing.
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Yu, Z., Song, S., Wang, G. et al. The mechanisms governing mouse embryonic palate mesenchymal cells’ proliferation associated with atRA-induced cleft palate in mice: insights from integrated transcriptomic and metabolomic analyses. Arch Toxicol 97, 2143–2153 (2023). https://doi.org/10.1007/s00204-023-03534-z
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DOI: https://doi.org/10.1007/s00204-023-03534-z