Abstract
Background
Thyroid hormones are primarily responsible for the brain development in perinatal mammals. However, this process can be inhibited by external factors such as environmental chemicals. Perinatal mammals are viviparous, which makes direct fetal examination difficult.
Methods
We used metamorphic amphibians, which exhibit many similarities to perinatal mammals, as an experimental system. Therefore, using metamorphic amphibians, we characterized the gene expression of matrix metalloproteinases, which play an important role in brain development.
Results
The expression of many matrix metalloproteinases (mmps) was characteristically induced during metamorphosis. We also found that the expression of many mmps was induced by T3 and markedly inhibited by hydroxylated polychlorinated biphenyls (PCBs).
Conclusion
Overall, our findings suggest that hydroxylated PCBs disrupt normal brain development by disturbing the gene expression of mmps.
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Data availability
All data generated or analyzed during this study are included in this manuscript.
Abbreviations
- ANOVA:
-
Analysis of variance
- DMSO:
-
Dimethyl sulfoxide
- EDCs:
-
Endocrine-disrupting chemicals
- FETAX:
-
Frog embryo teratogenesis assay Xenopus
- MMPs:
-
Matrix metalloproteinases
- PCBs:
-
Polychlorinated biphenyls
- PCR:
-
Polymerase chain reaction
- T3 :
-
3,3′,5-Triiodo-L-thyronine
- THs:
-
Thyroid hormones
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Acknowledgements
We thank Editage (https://www.editage.jp/) for the thorough and critical reading and revision of the manuscript.
Funding
This work was supported in part by JSPS KAKENHI (Grant Number 22K06312).
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Material preparation, data collection and analysis, and the first draft of the manuscript was prepared by Akinori Ishihara.
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All breeding and experimental procedures were approved by the Shizuoka University Animal Experiment Committee (permits #2019F-10 and #2020F-11) under the International Guidelines on Welfare and Management of Animals (Ministry of the Environment).
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Ishihara, A. Hydroxylated polychlorinated biphenyls may affect the thyroid hormone-induced brain development during metamorphosis of Xenopus laevis by disturbing the expression of matrix metalloproteinases. Mol Biol Rep 51, 624 (2024). https://doi.org/10.1007/s11033-024-09555-w
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DOI: https://doi.org/10.1007/s11033-024-09555-w