Effect of Vitamin D3 Supplementation on Blood Parameters and Liver Gene Expression in Female Rats

Overview

Journal Mol Biol Rep

Specialty Molecular Biology

Date 2024 Mar 27

PMID 38536498

Authors

Maria Oczkowicz

Beata Szymczyk

Malgorzata Swiatkiewicz

Alicja Wierzbicka

Anna Steg

Tomasz Szmatola

Affiliations

Soon will be listed here.

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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