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  • Title: Differential Expression of FXR and Genes Involved in Inflammation and lipid Metabolism Indicate Adipose Tissue Dysfunction in Gestational Diabetes.
    Author: Valencia-Ortega J, González-Reynoso R, Salcedo-Vargas M, Díaz-Velázquez MF, Ramos-Martínez E, Ferreira-Hermosillo A, Mercado M, Saucedo R.
    Journal: Arch Med Res; 2023 Apr; 54(3):189-196. PubMed ID: 36805269.
    Abstract:
    BACKGROUND: Gestational diabetes mellitus (GDM) is the most frequent metabolic alteration in pregnancy. Several abnormalities in visceral adipose tissue (VAT) have been described as part of its pathophysiology including hypertrophy, inflammation and altered lipid metabolism. Farnesoid X receptor (FXR) is involved in adipocyte physiology and inflammation, so its expression may correlate with the expression of tumor necrosis factor-alpha (TNF-α), interleukin-10 (IL-10), lipoprotein lipase (LPL), and two fatty acid transporters (SLC27A2, and SLC27A4). AIM: To compare the FXR, LPL, SLC27A2, SLC27A4, TNF-α, and IL-10 mRNA expression in VAT between women with GDM and healthy pregnant (HP) women. Secondarily, to evaluate the potential correlation between these expression levels. MATERIALS AND METHODS: Cross-sectional study of 50 GDM and 50 HP women. Conventional biochemical tests were performed and relative mRNA expression in VAT was measured by RT-qPCR. RESULTS: Gene expression levels of FXR and IL-10 were lower, whereas those of LPL, as well as the TNF-α/IL-10 ratio, were higher in women with GDM compared to HP. Pre-pregnancy BMI was the main significant independent variable for FXR levels in VAT from women with GDM. In all women, LPL expression levels correlated positively with those of SLC27A2. Only in women with GDM, IL-10 expression levels correlated negatively with those of SLC27A2, and SLC27A4. CONCLUSIONS: GDM is associated with decreased expression of FXR and IL-10 and increased expression of LPL, as well as a higher TNF/IL-10 ratio in VAT. These results suggest increased lipid storage and pro-inflammatory state indicating VAT dysfunction in this metabolic disorder.
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