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Article

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Accepted version

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2021-03-02

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/179430

Catch-up growth in juvenile rats, fat expansion, and dysregulation of visceral adipose tissue

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https://doi.org/10.1038/s41390-021-01422-9

Abstract

BACKGROUND: Accelerated catch-up growth following intrauterine restriction increases the risk of developing visceral adiposity and metabolic abnormalities. However, the underlying molecular mechanisms of such metabolic programming are still poorly understood. METHODS: A Wistar rat model of catch-up growth following intrauterine restriction was used. A gene expression array was performed in the retroperitoneal adipose tissue sampled at postnatal day (PD) 42. RESULTS: Five hundred and forty-six differentially expressed genes (DEGs) were identified (adjusted p value < 0.05). Gene ontology enrichment analysis identified pathways related to immune and lipid metabolic processes, brown fat cell differentiation, and regulation of PI3K. Ccl21, Npr3, Serpina3n, Pnpla3, Slc2a4, and Serpina12 were validated to be upregulated in catch-up pups (all p < 0.01) and related to several fat expansion and metabolic parameters, including body weight at PD42, postnatal body weight gain, white and brown adipose tissue mass, plasma triglycerides, and insulin resistance index (all p < 0.05). CONCLUSIONS: Genes related to immune and metabolic processes were upregulated in retroperitoneal adipose tissue following catch-up growth in juvenile rats and were found to be associated with fat expansion and metabolic parameters. Our results provide evidence for several dysregulated genes in white adipose tissue that could help develop novel strategies to prevent the metabolic abnormalities associated with catch-up growth.

Subject

Teixit adipós, Rates, Creixement

Subject (English)

Adipose tissues, Rats, Growth

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Articles publicats en revistes (Bioquímica i Biomedicina Molecular)

Citation

LIZARRAGA MOLLINEDO, Esther, et al. Catch-up growth in juvenile rats, fat expansion, and dysregulation of visceral adipose tissue. Pediatric Research. 2021. Vol. 89, num. 1-9. ISSN 0031-3998. [consulted: 15 of August of 2026]. Available at: https://hdl.handle.net/2445/179430

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