Person: Callejo Arranz, María
Universidad Complutense de Madrid
Faculty / Institute
Farmacología y Toxicología
Now showing 1 - 5 of 5
- PublicationVitamin D in pulmonary hypertension(Universidad Complutense de Madrid, 2022-10-17) Callejo Arranz, María; Pérez Vizcaíno Dr. Dani, Francisco; Cogolludo Torralba, Ángel; Morales Cano, DanielPulmonary arterial hypertension (PAH) is a vascular chronic disorder, characterized by sustained vasoconstriction, vascular remodelling, thrombosis in situ and inflammation. Although there have been important advances in the knowledge of its pathophysiology and consequently of its pharmacological treatments, PAH remains a debilitating, limiting and rapidly progressive disease. In recent years, epidemiological, nutritional studies and animal models have reported an association between nutritional factors and PAH. Moreover, some authors suggest that nutritional intervention may be a new preventive strategy in PAH. Vitamin D (vitD) deficiency is a worldwide health problem of pandemic proportions. Preliminary studies have suggested that vitD deficiency is more prevalent in PAH patients than in general population. There are some basic and clinic evidences which suggest that hypovitaminosis D may negatively impact on disease progression. The active form of vitD, i.e.,calcitriol, exerts its functions through the vitamin D receptor (VDR), which acts as a transcription factor, regulating changes in gene expression. The discovery of VDR in many tissues and cell types that do not participate in calcium and phosphorous homeostasis, (the main functions of calcitriol), led to identify a great variety of functions mediated by VDR, and of potential relevance in the cardiovascular system, such as cell proliferation, differentiation, control of vascular tone or immunomodulation...
- PublicationTotal, Bioavailable, and Free Vitamin D Levels and Their Prognostic Value in Pulmonary Arterial Hypertension(MDPI, 2020-02-06) Callejo Arranz, María; Mondejar Parreño, Gema; Esquivel Ruiz, Sergio Antonio; Olivencia Plaza, Miguel Ángel; Moreno Gutiérrez, Laura; Blanco, Isabel; Escribano Subías, María Pilar; Cogolludo Torralba, Ángel Luis; Barbera, Joan Albert; Pérez Vizcaíno, FranciscoIntroduction: Epidemiological studies suggest a relationship between vitamin D deficiency and cardiovascular and respiratory diseases. However, whether total, bioavailable, and/or free vitamin D levels have a prognostic role in pulmonary arterial hypertension (PAH) is unknown. We aimed to determine total, bioavailable, and free 25-hydroxy-vitamin D (25(OH)vitD) plasma levels and their prognostic value in PAH patients. Methods: In total, 67 samples of plasma from Spanish patients with idiopathic, heritable, or drug-induced PAH were obtained from the Spanish PH Biobank and compared to a cohort of 100 healthy subjects. Clinical parameters were obtained from the Spanish Registry of PAH (REHAP). Results: Seventy percent of PAH patients had severe vitamin D deficiency (total 25(OH)vitD < 10 ng/mL) and secondary hyperparathyroidism. PAH patients with total 25(OH)vitD plasma above the median of this cohort (7.17 ng/mL) had better functional class and higher 6-min walking distance and TAPSE (tricuspid annular plane systolic excursion). The main outcome measure of survival was significantly increased in these patients (age-adjusted hazard ratio: 5.40 (95% confidence interval: 2.88 to 10.12)). Vitamin D-binding protein (DBP) and albumin plasma levels were downregulated in PAH. Bioavailable 25(OH)vitD was decreased in PAH patients compared to the control cohort. Lower levels of bioavailable 25(OH)vitD (<0.91 ng/mL) were associated with more advanced functional class, lower exercise capacity, and higher risk of mortality. Free 25(OH)vitD did not change in PAH; however, lower free 25(OH)vitD (<1.53 pg/mL) values were also associated with high risk of mortality. Conclusions: Vitamin D deficiency is highly prevalent in PAH, and low levels of total 25(OH)vitD were associated with poor prognosis.
- PublicationImpact of Vitamin D Deficit on the Rat Gut Microbiome(MDPI, 2019-10-24) Robles-Vera, Iñaki; Callejo Arranz, María; Ramos, Ricardo; Duarte, Juan; Pérez Vizcaíno, FranciscoInadequate immunologic, metabolic and cardiovascular homeostasis has been related to either an alteration of the gut microbiota or to vitamin D deficiency. We analyzed whether vitamin D deficiency alters rat gut microbiota. Male Wistar rats were fed a standard or a vitamin D-free diet for seven weeks. The microbiome composition was determined in fecal samples by 16S rRNA gene sequencing. The vitamin D-free diet produced mild changes on α- diversity but no effect on β-diversity in the global microbiome. Markers of gut dysbiosis like Firmicutes-to-Bacteroidetes ratio or the short chain fatty acid producing bacterial genera were not significantly affected by vitamin D deficiency. Notably, there was an increase in the relative abundance of the Enterobacteriaceae, with significant rises in its associated genera Escherichia, Candidatus blochmannia and Enterobacter in vitamin D deficient rats. Prevotella and Actinomyces were also increased and Odoribacteraceae and its genus Butyricimonas were decreased in rats with vitamin D-free diet. In conclusion, vitamin D deficit does not induce gut dysbiosis but produces some specific changes in bacterial taxa, which may play a pathophysiological role in the immunologic dysregulation associated with this hypovitaminosis.
- PublicationRestoration of Vitamin D Levels Improves Endothelial Function and Increases TASK-Like K+ Currents in Pulmonary Arterial Hypertension Associated with Vitamin D Deficiency(MPDI, 2021-05-26) Callejo Arranz, María; Morales Cano, Daniel; Mondejar Parreño, Gema; Barreira, Bianca; Esquivel Ruiz, Sergio Antonio; Olivencia Plaza, Miguel Ángel; Moreno Gutiérrez, Laura; Cogolludo Torralba, Ángel Luis; Pérez Vizcaíno, FranciscoVitamin D (vitD) deficiency is highly prevalent in patients with pulmonary arterial hypertension (PAH). Moreover, PAH-patients with lower levels of vitD have worse prognosis. We hypothesize that recovering optimal levels of vitD in an animal model of PAH previously depleted of vitD improves the hemodynamics, the endothelial dysfunction and the ionic remodeling. Methods: Male Wistar rats were fed a vitD-free diet for five weeks and then received a single dose of Su5416 (20 mg/Kg) and were exposed to vitD-free diet and chronic hypoxia (10% O2) for three weeks to induce PAH. Following this, vitD deficient rats with PAH were housed in room air and randomly divided into two groups: (a) continued on vitD-free diet or (b) received an oral dose of 100,000 IU/Kg of vitD plus standard diet for three weeks. Hemodynamics, pulmonary vascular remodeling, pulmonary arterial contractility, and K+ currents were analyzed. Results: Recovering optimal levels of vitD improved endothelial function, measured by an increase in the endothelium-dependent vasodilator response to acetylcholine. It also increased the activity of TASK-1 potassium channels. However, vitD supplementation did not reduce pulmonary pressure and did not ameliorate pulmonary vascular remodeling and right ventricle hypertrophy. Conclusions: Altogether, these data suggest that in animals with PAH and severe deficit of vitD, restoring vitD levels to an optimal range partially improves some pathophysiological features of PAH.
- PublicationImpact of Nutrition on Pulmonary Arterial Hypertension(MDPI, 2020-01-07) Callejo Arranz, María; Barberá, Joan Albert; Duarte, Juan; Pérez Vizcaíno, FranciscoPulmonary arterial hypertension (PAH) is characterized by sustained vasoconstriction, vascular remodeling, inflammation, and in situ thrombosis. Although there have been important advances in the knowledge of the pathophysiology of PAH, it remains a debilitating, limiting, and rapidly progressive disease. Vitamin D and iron deficiency are worldwide health problems of pandemic proportions. Notably, these nutritional alterations are largely more prevalent in PAH patients than in the general population and there are several pieces of evidence suggesting that they may trigger or aggravate disease progression. There are also several case reports associating scurvy, due to severe vitamin C deficiency, with PAH. Flavonoids such as quercetin, isoflavonoids such as genistein, and other dietary polyphenols including resveratrol slow the progression of the disease in animal models of PAH. Finally, the role of the gut microbiota and its interplay with the diet, host immune system, and energy metabolism is emerging in multiple cardiovascular diseases. The alteration of the gut microbiota has also been reported in animal models of PAH. It is thus possible that in the near future interventions targeting the nutritional status and the gut dysbiosis will improve the outcome of these patients.