Abstract
Background
To better understand the molecular mechanism responsible for the therapeutic potential of vitamin D, we conducted an analysis of the liver transcriptomes of adult female rats.
Methods
Adult female rats (n = 18) were divided into three groups, receiving different doses of vitamin D: group I, 0; group II, 1000 U/kg; and group III, 5000 U/kg. Growth, body weight, the weight of main organs, blood haematological and biochemical parameters were evaluated. Gene expression in the liver were analyzed using RNA-seq and qPCR techniques.
Results
We observed a lower platelet count (p < 0,008) and a significantly greater (p < 0.02) number of WBCs in rats supplemented with 1000 U/kg than in rats from group III (5000 U/kg). Moreover, we noted a trend (p < 0.06) in total cholesterol concentration, suggesting a linear decrease with increasing doses of vitamin D. RNA-seq analysis did not reveal any differentially expressed genes with FDR < 0.05. However, GSEA revealed significant activation of a number of processes and pathways, including: “metallothionein, and TspO/MBR family”, and “negative regulation of tumor necrosis factor production”. qPCR analysis revealed significant upregulation of the Mt1, Mt2 and Orm1 genes in animals receiving high doses of vitamin D (p < 0.025, p < 0.025, and p < 0009, respectively). Moreover, Srebp2 and Insig2 were significantly lower in both experimental groups than in the control group (p < 0.003 and p < 0.036, respectively).
Conclusions
Our results support the anti-inflammatory, anitioxidant and anticholesterologenic potential of vitamin D but suggest that high doses of vitamin D are needed to obtain significant results in this regard.
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Data availability
Data that support the findings of this study have been deposited in the Gene Expression Omnibus NCBI, accession code: GSE243386.
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Funding
This work was supported by the National Research Institute of Animal Production, Statutory activity no 04-18-03-21.
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M.O. conceptualization, writting the manuscript, preparing figures.B.S and M.S. supervison over animal experiment, blood parameters analysis, table preparation.A.W and A.S RNA-seq and qPCR experimentsT.S. Bioinformatic analysisAll authors reviewed the manuscript.
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All the experimental procedures were reviewed and approved by the 2nd Local Ethics Committee for Animal Experimentation in Krakow (agreement no. 136/2018). The experiment was conducted according to the guidelines of the Declaration of Helsinki and in compliance with the European Union law (Directive 2010/63/UE, received in Poland by Legislative Decree 266/2015) of the European Parliament and of the Council on the protection of animals used for scientific or educational purposes.
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Oczkowicz, M., Szymczyk, B., Świątkiewicz, M. et al. Effect of vitamin D3 supplementation on blood parameters and liver gene expression in female rats. Mol Biol Rep 51, 456 (2024). https://doi.org/10.1007/s11033-024-09408-6
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DOI: https://doi.org/10.1007/s11033-024-09408-6