Josune Olza

Dr. Josune Olza

orcid

Research Focus & Metrics

Academic Career Length

19Years (2008-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
21 February 2017 in Nutrients
Verified
Journal Article
Open access
PDF file
JOJosune Olza
Josune Olza
JAJavier Aranceta-Bartrina
Javier Aranceta-Bartrina
Marcela Gonzalez-GrossMarcela Gonzalez-Gross
Marcela Gonzalez-Gross
RORosa M Ortega
Rosa M Ortega
Lluis Serra-MajemLluis Serra-Majem
Lluis Serra-Majem
AGAngel Gil
Angel Gil
Calcium, phosphorus, magnesium and vitamin D have important biological roles in the body, especially in bone metabolism. We aimed to study the reported intake, the disparity between the reported consumption and the level needed for adequacy and food sources of these four nutrients in the Spanish population. We assessed the reported intake for both, general population and plausible reporters. Results were extracted from the ANIBES survey, n = 2009. Three-day dietary reported intake data were obtained and misreporting was assessed according to the European Food Safety Authority (EFSA). Mean ± SEM (range) total reported consumption of calcium, phosphorus, magnesium, and vitamin D for the whole population were 698 ± 7 mg/day (71–2551 mg/day), 1176 ± 8 mg/day, (331–4429 mg/day), 222 ± 2 mg/day (73–782 mg/day), and 4.4 ± 0.1 µg/day (0.0–74.2 µg/day), respectively. In the whole group, 76% and 66%; 79% and 72%; and 94% and 93% of the population had reported intakes below 80% of the national and European recommended daily intakes for calcium, magnesium and vitamin D, respectively; these percentages were over 40% when the plausible reporters were analysed separately. The main food sources were milk and dairy products for calcium and phosphorus, cereals and grains for magnesium and fish for vitamin D. In conclusion, there is an important percentage of the Spanish ANIBES population not meeting the recommended intakes for calcium, magnesium and vitamin D.

6 July 2017 in Nutrients
Verified
Journal Article
Open access
PDF file
JOJosune Olza
Josune Olza
JAJavier Aranceta
Javier Aranceta
Marcela Gonzalez-GrossMarcela Gonzalez-Gross
Marcela Gonzalez-Gross
RORosa M Ortega
Rosa M Ortega
Lluis Serra-MajemLluis Serra-Majem
Lluis Serra-Majem
AGAngel Gil
Angel Gil
Zinc, selenium, and the vitamins A, E and C, all have specific biological functions that are involved mainly in the antioxidant defence system, which has important implications for the development of chronic diseases. We aimed to assess the reported intake of those six nutrients, as well as the food that contributes to their sources of intakes. Data were obtained from the Spanish ANIBES (“Anthropometry, Intake and Energy Balance in Spain”) study, n = 2009 (9–75 years old). The analyses were performed in the whole population and in the plausible energy reporters after a misreporting analysis according to the European Food and Safety Authority (EFSA) protocol. A validated, photo-based three-day food record was used to collect the data. Mean (max−min) reported intake for the whole population of zinc was 8.1 ± 0.1 mg/day, (2.3–27.3 mg/day), selenium 75 ± 1 µg/day, (14–265 µg/day), vitamin A 668 µg RE/day (2–11,017 µg RE/day), retinol 364 ± 18 µg/day (0–10,881 µg/day), carotenes 1735 ± 35 µg/day (13–13,962 µg/day), vitamin E 7.0 ± 0.1 mg α-TE/day (0.7–55.2 mg α-TE/day) and vitamin C 84.4 ± 1.4 mg/day (5.0–802.7 mg/day). The main source intakes for zinc were meat and meat products, for selenium cereals and grains, for vitamin E oils and fat, and for vitamin A and C vegetables. There is an elevated percentage of the Spanish ANIBES population not meeting the EFSA recommended intakes for all analysed micronutrients: zinc (83%), vitamin A (60%), vitamin E (80%), vitamin C (36%) and selenium (25%).

1 November 2015 in Contemporary Clinical Trials
Verified
Journal Article
Closed access
GSGuillermo Sanchez-Delgado
Guillermo Sanchez-Delgado
Borja Martínez-TéllezBorja Martínez-Téllez
Borja Martínez-Téllez
JOJosune Olza
Josune Olza
CAConcepcion Maria Aguilera
Concepcion Maria Aguilera
Idoia LabayenIdoia Labayen
Idoia Labayen
Jonatan RuizJonatan Ruiz
Jonatan Ruiz

1 September 2011 in Pediatric Obesity
Verified
Journal Article
Closed access
PDF file
AGAngel Gil
Angel Gil
JOJosune Olza
Josune Olza
MGMercedes Gil-Campos
Mercedes Gil-Campos
CGCarolina Gomez-Llorente
Carolina Gomez-Llorente
CAConcepcion Maria Aguilera
Concepcion Maria Aguilera
This review focuses on metabolic differences of adipose tissue at different sites of the body, with emphasis in pediatrics. Adipose tissue is composed of various cell types, which include adipocytes and other cells of the stromal vascular fraction such as preadipocytes, blood cells, endothelial cells and macrophages. Mammals have two main types of adipose tissue: white adipose tissue (WAT), and brown adipose tissue (BAT), each of which possesses unique cell autonomous properties. WAT and BAT differ at the functional, as well as the morphological and molecular levels. WAT accumulates surplus energy mainly in the form of triacylglycerols and BAT dissipates energy directly as heat. Recently, functional BAT in humans has been located in the neck, supraclavicular, mediastinal and interscapular areas. WAT is distributed throughout the body in the form of two major types: subcutaneous adipose tissue (SWAT) and the intra-abdominal visceral adipose tissue (VWAT). VWAT tissue is associated with insulin resistance, diabetes mellitus, dyslipidaemia, hypertension, atherosclerosis, hepatic steatosis, and overall mortality whereas SWAT and BAT have intrinsic beneficial metabolic properties. Subcutaneous and visceral adipocytes derive from different progenitor cells that exhibit a different gene expression pattern. SWAT responds better to the antilipolytic effects of insulin and other hormones, secrets more adiponectin and less inflammatory cytokines, and is differentially affected by molecules involved in signal transduction as well as drugs compared with VWAT. Current research is investigating various approaches of BAT and SWAT transplantation, including new sources of adipocyte progenitors. This may be important for the potential treatment of childhood obesity.

25 July 2015 in Annals of Nutrition and Metabolism
Verified
Journal Article
Closed access
GSGuillermo Sanchez-Delgado
Guillermo Sanchez-Delgado
Borja Martínez-TéllezBorja Martínez-Téllez
Borja Martínez-Téllez
JOJosune Olza
Josune Olza
CAConcepcion Maria Aguilera
Concepcion Maria Aguilera
AGAngel Gil
Angel Gil
JRJonatan R. Ruiz
Jonatan R. Ruiz
Background: The energy-burning capacity of brown adipose tissue (BAT) makes it an attractive target for use in anti-obesity therapies. Moreover, due to its ability to oxidize glucose and lipids, BAT activation has been considered a potential therapy to combat type 2 diabetes and atherogenesis. Summary: BAT is mainly regulated by the sympathetic nervous system (SNS); yet, recent findings have shown a group of novel activators that act independently of the stimulation of the SNS such as cardiac natriuretic peptides, irisin, interleukin-6, β-aminoisobutyric acid and fibroblast growth factor 21 that could influence BAT metabolism. Several strategies are being examined to activate and recruit BAT with no side effects. In this review, we postulate that exercise might activate and recruit human BAT through the activation of SNS, heart and skeletal muscle. Key Messages: Epidemiological and well-designed exercise-based randomized controlled studies are needed to clarify if exercise is able to activate BAT in humans.

31 July 2019 in Nutrients
Verified
Journal Article
Open access
PDF file
CTCarmen Tenorio-Jiménez
Carmen Tenorio-Jiménez
MMMaría José Martínez-Ramírez
María José Martínez-Ramírez
ICIsabel Del Castillo-Codes
Isabel Del Castillo-Codes
CACarmen Arraiza-Irigoyen
Carmen Arraiza-Irigoyen
MTMercedes Tercero-Lozano
Mercedes Tercero-Lozano
CGCarolina Gomez-Llorente
Carolina Gomez-Llorente
Previous studies have reported that probiotics may improve clinical and inflammatory parameters in patients with obesity and metabolic syndrome (MetS). Lactobacillus (L.) reuteri V3401 has shown promising results on the components of MetS in animal studies. We aimed to evaluate the effects of L. reuteri V3401 together with healthy lifestyle recommendations on adult patients with MetS. Methods: We carried out a randomized, crossover, placebo-controlled, single-center trial in which we included 53 adult patients newly diagnosed with MetS. Patients were block randomly allocated by body mass index (BMI) and sex to receive a capsule containing either the probiotic L. reuteri V3401 (5 × 109 colony-forming units) or a placebo once daily for 12 weeks. Anthropometric variables, biochemical and inflammatory biomarkers, as well as the gastrointestinal microbiome composition were determined. Results: There were no differences between groups in the clinical characteristics of MetS. However, we found that interleukin-6 (IL-6) and soluble vascular cell adhesion molecule 1 (sVCAM-1) diminished by effect of the treatment with L. reuteri V3401. Analysis of the gastrointestinal microbiome revealed a rise in the proportion of Verrucomicrobia. Conclusions: Consumption of L. reuteri V3401 improved selected inflammatory parameters and modified the gastrointestinal microbiome. Further studies are needed to ascertain additional beneficial effects of other probiotic strains in MetS as well as the mechanisms by which such effects are exerted.