María Encarnación Rodriguez-Ortiz

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Fibroblast growth factor (FGF) 23 inhibits calcitriol production, which could exacerbate calcium deficiency or hypocalcemia unless calcium itself modulates FGF23 in this setting. In Wistar rats with normal renal function fed a diet low in both calcium and vitamin D, the resulting hypocalcemia was associated with low FGF23 despite high parathyroid hormone(More)
Fibroblastic growth factor 23 (FGF23) is a bone-derived hormone that has a pivotal role in the pathogenesis of mineral disorders in chronic kidney disease. To study the effect of parathyroid hormone (PTH) on FGF23, rats were parathyroidectomized for a week and then implanted with constant-delivery infusion pumps to provide vehicle, a physiological, or a(More)
BACKGROUND The interest on magnesium (Mg) has grown since clinical studies have shown the efficacy of Mg-containing phosphate binders. However, some concern has arisen for the potential effect of increased serum Mg on parathyroid hormone (PTH) secretion. Our objective was to evaluate the direct effect of Mg in the regulation of the parathyroid function;(More)
The present study investigates the differential effect of two vitamin D receptor agonists, calcitriol and paricalcitol, on human aortic smooth muscle cells calcification in vitro. Human vascular smooth muscle cells were incubated in a high phosphate (HP) medium alone or supplemented with either calcitriol 10(-8)M (HP + CTR) or paricalcitol 3·10(-8) M (HP +(More)
Vascular calcification (VC) is frequently observed in patients with chronic renal failure and appears to be an active process involving transdifferentiation of vascular smooth muscle cells (VSMCs) to osteoblast-like cells. Reports of VC prevention in uremic rodents by calcimimetics coupled with identification of the calcium-sensing receptor (CaSR) in VSMCs(More)
BACKGROUND/AIMS Hypovitaminosis D has been associated with an increased cardiovascular mortality in the general population and in patients with chronic kidney disease (CKD). Still, whether prescribing vitamin D reduces the risk of mortality in renal patients remains controversial. METHODS We searched PubMed, ClinicalTrials.gov and the Cochrane Library for(More)
Chronic kidney disease is considered a major cause of cardiovascular risk and non-traditional risk factors remain largely unknown. The in vitro toxicity of 10 guanidino compounds (GCs) was evaluated via a standardized approach on different cell systems of relevance in cardiovascular disease. The parameters evaluated were production of reactive oxygen(More)
We have previously demonstrated that the activation of rat parathyroid calcium-sensing receptor (CaSR) upregulates VDR expression in vivo (Garfia B, Cañadillas S, Luque F, Siendones E, Quesada M, Almadén Y, Aguilera-Tejero E, Rodríguez M. J Am Soc Nephrol 13: 2945-2952, 2002; Rodriguez ME, Almaden Y, Cañadillas S, Canalejo A, Siendones E, Lopez I,(More)
Maintaining mineral metabolism requires several organs and hormones. Fibroblast growth factor 23 (FGF23) is a phosphatonin produced by bone cells that reduces renal production of calcitriol - 1,25(OH) 2D 3 - and induces phosphaturia. The consequences of a reduction in 1,25(OH) 2D 3 involve changes in calcium homeostasis. There are several factors that(More)
BACKGROUND Transforming growth factor-β (TGF-β) is a key cytokine during differentiation of mesenchymal stem cells (MSC) into vascular smooth muscle cells (VSMC). High phosphate induces a phenotypic transformation of vascular smooth muscle cells (VSMC) into osteogenic-like cells. This study was aimed to evaluate signaling pathways involved during VSMC(More)