Cited by 34Birth, Development, and HealthCircadian rhythm and melatoninLiver physiology and pathology

Gestation under chronic constant light leads to extensive gene expression changes in the fetal rat liver

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Spichiger, Carlos, Torres-Farfan, Claudia, Galdames, Hugo A., Mendez, Natalia, Alonso-Vazquez, Pamela, Richter, Hans G.·2015·Physiological Genomics

Abstract

Recent reports account for altered metabolism in adult offspring from pregnancy subjected to abnormal photoperiod, suggesting fetal programming of liver physiology. To generate a pipeline of subsequent mechanistic experiments addressing strong candidate genes, here we investigated the effects of constant gestational light on the fetal liver transcriptome. At 10 days of gestation, dams were randomized in two groups ( n = 7 each): constant light (LL) and normal photoperiod (12 h light/12 h dark; LD). At 18 days of gestation, RNA was isolated from the fetal liver and subjected to DNA microarray (Affymetrix platform for 28,000 genes). Selected differential mRNAs were validated by quantitative PCR (qPCR), while integrated transcriptional changes were analyzed with Ingenuity Pathway Analysis and other bioinformatics tools. Comparison of LL relative to LD fetal liver led to the following findings. Significant differential expression was found for 3,431 transcripts (1,960 upregulated and 1,471 downregulated), with 393 of them displaying ≥ 1.5-fold change. We validated 27 selected transcripts by qPCR, which displayed fold-change values highly correlated with microarray ( r 2= 0.91). Different markers of nonalcoholic fatty liver disease were either upregulated (e.g., Ndn and Pnpla3) or downregulated (e.g., Gnmt, Bhmt1/2, Sult1a1, Mpo, and Mat1a). Diverse pathways were altered, including hematopoiesis, coagulation cascade, complement system, and carbohydrate and lipid metabolism. The microRNAs 7a-1, 431, 146a, and 153 were upregulated, while the abundant hepatic miRNA 122 was downregulated. Constant gestational light induced extensive modification of the fetal liver transcriptome. A number of differentially expressed transcripts belong to fundamental functional pathways, potentially contributing to long-term liver disease.

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Crossref · 10.1152/physiolgenomics.00023.2015

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Authors
Spichiger, C., Torres-Farfan, C., Galdames, H. A., Mendez, N., Alonso-Vazquez, P., & Richter, H. G.
Affiliations
  • Austral University of Chile (CL)
  • Laboratory of Developmental Chronobiology, Institute of Anatomy, Histology and Pathology, Faculty of Medicine, Universidad Austral de Chile, Valdivia, Chile
Corresponding author
Richter, Hans G.
Venue
Physiological Genomics
Published
2015-12
Volume
47
Issue
12
Pages
621-633
ISSN
  • 1094-8341 (ISSN-L)
  • 1531-2267
OpenAlex
W2469020469
Cited by
34
References
56
Citations by year
2026: 1 · 2025: 1 · 2024: 2 · 2023: 2 · 2022: 1 · 2021: 2 · 2020: 17 · 2019: 3 · 2018: 3 · 2017: 1 · 2016: 1
FWCI
1.67
Type
journal article
Language
en
Open access
Locations
  • Physiological Genomics (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Birth, Development, and Health
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
Keywords
continuous light exposure, fetal programming, photoperiod, non-alcoholic fatty liver disease, microRNA, hepatic gene expression, lipid metabolism, carbohydrate metabolism, hematopoiesis, coagulation, complement system, rats
MeSH terms
Animals, Female, Fetus, Gene Expression Regulation, Light, Liver, Liver Diseases, Pregnancy, Oligonucleotide Array Sequence Analysis, MicroRNAs, Lipid Metabolism, Rats

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