期刊
CELLS
卷 10, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/cells10092375
关键词
Xenopus metamorphosis; thyroid hormone; glucocorticoids; cross-talks; functional genomics; DNA methylation
类别
资金
- Centre National de la Recherche Scientifique
- Museum National d'Histoire Naturelle
- CRESCENDO
- European Integrated Project fund [LSHM-CT-2005-018652]
- IDEAL a European Large Integrated Project funding from FP7 [259679]
- TRIGGER [ANR-08-JCJC-0100-01]
- MethylDev
- PICS CNRS funding program
- France Genomique national infrastructure
- Investissements d'Avenir program [ANR-10-INBS-09]
- Agence Nationale de la Recherche (ANR) [ANR-08-JCJC-0100] Funding Source: Agence Nationale de la Recherche (ANR)
The study focused on the interactions between thyroid hormone and glucocorticoid signaling during Xenopus tropicalis metamorphosis, revealing that the cross-talks are more complex than initially thought. Gene expression is mainly regulated by T-3 or CORT, with some genes showing intricate interactions between the signaling pathways. DNA methylation changes are highly dynamic and influenced by cross-talks.
Background: Most work in endocrinology focus on the action of a single hormone, and very little on the cross-talks between two hormones. Here we characterize the nature of interactions between thyroid hormone and glucocorticoid signaling during Xenopus tropicalis metamorphosis. Methods: We used functional genomics to derive genome wide profiles of methylated DNA and measured changes of gene expression after hormonal treatments of a highly responsive tissue, tailfin. Clustering classified the data into four types of biological responses, and biological networks were modeled by system biology. Results: We found that gene expression is mostly regulated by either T-3 or CORT, or their additive effect when they both regulate the same genes. A small but non-negligible fraction of genes (12%) displayed non-trivial regulations indicative of complex interactions between the signaling pathways. Strikingly, DNA methylation changes display the opposite and are dominated by cross-talks. Conclusion: Cross-talks between thyroid hormones and glucocorticoids are more complex than initially envisioned and are not limited to the simple addition of their individual effects, a statement that can be summarized with the pseudo-equation: TH center dot GC > TH + GC. DNA methylation changes are highly dynamic and buffered from genome expression.
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