Raquel Mateos

Raquel Mateos
Spanish National Research Council | CSIC · Institute of Food Science, Technology and Nutrition

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121
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Publications

Publications (121)
Article
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Olive pomace oil (OPO) is mainly a source of monounsaturated fat together with a wide variety of bioactive compounds, such as triterpenic acids and dialcohols, squalene, tocopherols, sterols and aliphatic fatty alcohols. To date, two long-term intervention studies have evaluated OPO’s health effects in comparison with high oleic sunflower oil (HOSO...
Article
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Knowledge on the bioavailability of coffee (poly)phenols mostly come from single dose postprandial studies. This study aimed at investigating the effects of regularly consuming a green coffee phenolic extract (GCPE) on the bioavailability and metabolism of (poly)phenols. Volunteers with overweight/obesity consumed a decaffeinated GCPE nutraceutical...
Article
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Many in vitro and in vivo studies support that green coffee polyphenols (GCP) and beta-glucans (BG) present important hypolipidaemic and hypoglycaemic effects. However, their weight-management/-reducing properties are less clear. Considering that these compounds act on different metabolic pathways, their combination could increase their beneficial...
Article
Nutraceuticals based on plant extracts rich in polyphenols, as well as dietary fibres, are new means to fight overweight/obesity and associated diseases. However, to understand the potential effects of polyphenols on health it is critical to study their bioavailability and metabolic fate. Consumption of a green coffee phenolic extract (GCPE) in com...
Presentation
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Rosmarinus officinalis L. is a widespread aromatic plant commonly consumed as a tea in traditional cuisine and folk medicine to treat various illnesses due to its therapeutic properties mainly attributed to its phenol content. However, little is known about the bioavailability of rosemary phenols, and, to the best of our knowledge, there are no bio...
Article
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Green coffee has weight management properties, yet its effects on appetite and satiety remain unclear as few, mainly acute, studies perform objective measurements. Therefore, the influence on appetite/satiety of acute and regular consumption of two nutraceuticals, a decaffeinated green coffee phenolic extract (GC) alone or combined with oat β-gluca...
Article
Gut microbiota bioconversion of polyphenols in predigested mango ‘Ataulfo’ peel was studied using a validated, dynamic in vitro human colon model (TIM-2) with faecal microbial inoculum. Dried peels were predigested with enzymatic treatment, followed by TIM-2 fermentation (72 h). Samples were taken at 0, 24, 48 and 72 h and analyzed by HPLC-QToF. De...
Article
Husk tomato (Physalis ixocarpa Brot. ex. Horm) is mainly used in the preparation of many Mexican sauces due to its unique and slightly acidic flavor, both in raw and cooked forms. These sauces also usually contain Serrano hot pepper (Capsicum annuum L), onion (Allium cepa L.), garlic (Allium sativum L.), coriander (Coriandrum sativum L.) and salt....
Article
Obesity and its associated comorbidities are a major public health concern worldwide. Reduced energy intake and increased physical activity interventions have limited success in the long term. Nutraceuticals might be an alternative means to help lose weight and reduce obesity-associated cardiometabolic risk factors without changes in the habitual d...
Article
Rosmarinus officinalis L. is a widespread aromatic plant commonly consumed as a tea in traditional cuisine and in folk medicine to treat various illnesses due to its therapeutic properties. To the best of our knowledge, there are no reports on the bioavailability and metabolism of R. officinalis tea polyphenols in humans. This study was aimed at as...
Article
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In previous studies, after regularly consuming a green/roasted coffee blend, body weight, body fat%, glucose, plasminogen activator inhibitor-1 (PAI-1), resistin, leptin, ghrelin, diastolic (DBP) and systolic blood pressure (SBP) significantly changed in healthy and hypercholesterolemic subjects. However, glucagon, total-cholesterol (T-C), triglyce...
Article
Yerba mate is highly consumed in South America and has become a popular beverage worldwide because of its healthy properties: antioxidant, vaso-dilating, lipid-reducing, anti-glycation, anti-inflammatory and weight-reducing effects, among others. These effects have been attributed to its high content in polyphenols, mainly chlorogenic acidS, but al...
Article
Vitamin E is a powerful antioxidant that prevents free radical propagation in membranes and plasma lipoproteins. Recommended Daily Allowance (RDA), stablished at 13 and 11 mg/day for adult men and women, respectively, is not fulfilled in most European countries. Thus, strategies to cover the daily recommendations of this vitamin are essential, and...
Article
Obesity and its associated comorbidities (type 2 diabetes mellitus, cardiovascular disease, etc.) are a major public health concern worldwide, with prevalence of obesity affecting in Europe up to 17% of the adult population (OCED/EU 2016). Strategies to lose weight mostly relay in lifestyle changes such as restriction in food intake and increased e...
Article
Yerba mate ( Ilex paraguariensis ) infusions have been shown to reduce plasma glucose in animals and serum lipids in humans. However, the effects of regularly consuming yerba mate on glucose metabolism in humans has been less studied. The objective of the study was to evaluate the effects of regularly consuming yerba mate on diabetes related biomar...
Article
Olive-pomace oil is rich in oleic acid, and thus it can be an interesting dietary fat alternative as it can allow reaching the recommendation of consuming 20% of total diet energy in the form of monounsaturated fatty acids. In addition, olive-pomace oil also contains a wide range of minor components that may contribute to its healthy properties. Th...
Article
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Cocoa has beneficial health effects partly due to its high flavanol content. This study was aimed at assessing the absorption and metabolism of polyphenols in two soluble cocoa products: a conventional (CC) and a flavanol-rich product (CC-PP). A crossover, randomized, blind study was performed in 13 healthy men and women. On two different days, aft...
Article
The main phenol in mate and coffee, 5-caffeoylquinic-acid (5-CQA), and its relevant microbial metabolites, dihydrocaffeic (DHCA) and dihydroferulic (DHFA) acids, have shown oxidative-stress protective effects in HepG2 cells. To evaluate possible endothelial-protective effects of the extracts and compounds, endothelial EA.hy926 cells were pre-treate...
Article
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PurposePreventive health effects of coffee could have a widespread impact on public health. Green coffee has more phenols than roasted, and thus is healthier, although with less acceptable organoleptic properties. Therefore, the effects of regularly consuming a green/roasted coffee blend (35/65) on the main components of MetS in humans were evaluat...
Article
Background: Rosmarinus officinalis is an aromatic plant used in folk medicine due to the therapeutic properties associated to its phenolic composition, rich in rosmarinic acid (RA) and caffeic acid (CA). To better understand the bioactivity of these compounds, their absorption and metabolism were assessed in human Caco-2 and HepG2 cells, as small...
Article
Roasting greatly reduces the phenolic content in green coffee beans. Considering the beneficial effects of coffee polyphenols, blends containing green coffee beans are being consumed as a healthier alternative to roasted coffee. This study was aimed at assessing the absorption and metabolism of hydroxycinnamates in an instant green/roasted (35/65)...
Article
Full-text available
Introduction: Rosemary (Rosmarinus officinalis L.) is an aromatic plant common in Tunisia and it is widely consumed as a tea in traditional cuisine and in folk medicine to treat various illnesses. Currently, most research efforts have been focused on rosemary essential oil, alcoholic and aqueous extracts, however, little is reported on rosemary in...
Article
Background: Beverages prepared from antioxidant rich plants are sources of polyphenols, which bioactivity depends on bioaccesibility in the gastrointestinal tract. This work evaluated the polyphenol content and antioxidant capacity of widely consumed beverages such as chamomile tea, yerba mate, a coffee blend (65% roasted:35% green), and coffee-li...
Article
Bioavailability of yerba mate phenolic compounds was assessed in healthy humans. More than 34 metabolites were identified in biological fluids, mainly sulfated conjugates of caffeic and ferulic/isoferulic acids, in addition to non-metabolized caffeoyl-, feruloyl- and p-coumaroilquinic acids, with rapid appearance and clearance in plasma indicative...
Article
Saponins are secondary plant metabolites constituted by a triterpenoid aglycone with one or more sugar chains. There is increasing interest in saponins due to their potential health effects. Yerba mate is an important source of saponins in many South American diets. The aim of this study was to develop a one-step procedure to isolate saponins from...
Article
Yerba mate is a beverage rich in bioactive compounds popular in South America. Polyphenols and methylxanthines were qualitatively and quantitatively analyzed in four commercial brands of yerba mate, as well as the antioxidant capacity of the beverages. Using LC/MS(n) analysis, 58 polyphenols were observed of which 4-sinapoylquinic acid, di- and tri...
Article
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This study examines the influence of different food-grade n-3 PUFA-enriched simple emulsion (SE), double emulsion (DE) and gelled double emulsion (GDE) delivery systems on the extent of lipolysis, antioxidant capacity and the bioaccessibility of hydroxytyrosol (HTy). GDE emulsion offered better protection for HTy (89%) than the other systems (79% i...
Article
Cardiovascular disease (CVD) is the major cause of morbidity and mortality worldwide. The consumption of a healthy diet rich in polyphenols has been inversely associated with the development of CVD. This study evaluated the effects of green coffee bean extract (GCBE) and yerba mate phenolic extract (YMPE), the main phenolic and methylxanthine const...
Article
Coffee is one of the most consumed beverages in the world, due to its unique aroma and stimulant properties. Although its health effects are controversial, moderate intake seems to be beneficial. The present work deals with the characterization and quantification of polyphenols and methylxanthines in four Arabica green coffee beans from different g...
Article
Red grape pomace (RGP) is a major winery by-product with interesting applications due to its high phenolic content and antioxidant capacity. Effects of in vitro gastrointestinal digestion and storage on the phenolic content and antioxidant capacity of RGP were studied. RGP polyphenols were stable under stomach-mimicking conditions and more sensitiv...
Article
The hepatoprotective effect of a yerba mate phenolic extract (YMPE), rich in chlorogenic acids, and its main circulating metabolites dihydrocaffeic (DHCA) and dihydroferulic (DHFA) acids were assessed in human hepatoma HepG2 cells subjected to oxidative damage induced by tert-butylhydroperoxide (t-BOOH). Direct treatment of HepG2 cells with realist...
Article
The purpose of this study was to compare three different emulsion-based systems, namely simple emulsion, double emulsion and gelled double emulsion, for delivery of n-3 fatty acids (perilla oil at 300 g/Kg) and hydroxytyrosol (300 mg/kg). Considering that their structural differences may affect their physical and oxidative stability, this was studi...
Article
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A series of alkyl nitrohydroxytyrosyl ether derivatives has been synthesized from free hydroxytyrosol (HT), the natural olive oil phenol, in order to increase the assortment of compounds with potential neuroprotective activity in Parkinson's disease. In this work, the antioxidant activity of these novel compounds has been evaluated using Ferric Red...
Article
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Chronic inflammation has been identified as a necessary step to mediate atherosclerosis and cardiovascular disease and as a relevant stage in the onset and progression of several types of cancer. Considerable attention has recently been focused on the identification of dietary bioactive compounds with anti-inflammatory activities as an alternative...
Article
Hydroxytyrosol (HT) and its derivatives in olive oil protect low-density lipoproteins (LDL) against oxidation. Biscuits could be a convenient alternative to broaden consumers’ choice of HT-rich foods, although the biscuit matrix could affect HT bioavailability. We performed a crossover, randomized, double-blind study to evaluate HT bioavailability...
Article
Considering that nitrocatechols present putative effect against Parkinson Disease, the absorption and metabolism of nitroderivatives of hydroxytyrosol (HT) were assessed using human cell model systems. The test compounds nitrohydroxytyrosol (NO2HT), nitrohydroxytyrosyl acetate (NO2HT-A), and ethyl nitrohydroxytyrosyl ether (NO2HT-E) were efficientl...
Article
Grape/wine industry produces large amounts of by-products, however knowledge on their health-promoting qualities is limited. This study investigated the effects of a grape phenolic extract (GPE) and its phenolic compounds, gallic acid (GA) and syringic acid (SA) on human intestinal Caco-2 cells, directly or after cytotoxicity induced by tert-butylh...
Article
Protective health effects of coffee could have a widespread impact on public health considering the high intake of this beverage in industrialized countries. However, certain of coffee's health effects are contradictory such as those on type 2 diabetes mellitus (T2DM). Green coffee is richer in antioxidant phenols than roasted coffee, and thus it i...
Article
The glycoprotein gp120 of the HIV-1 viral envelope has a high content in mannose residues, particularly α-1,2-mannose oligomers. Compounds that interact with these high-mannose type glycans may disturb the interaction between gp120 and its (co)receptors and are considered potential anti-HIV agents. Previously, we demonstrated that a tripodal recept...
Article
Oxidative stress and reactive oxygen species (ROS)-mediated cell damage are implicated in various chronic pathologies. Emerging studies show that polyphenols may act by increasing endogenous antioxidant defense potential. Cranberry has one of the highest polyphenol content among commonly consumed fruits. In this study, the hepato-protective activit...
Article
Isochroman-derivatives of the natural olive oil phenol hydroxytyrosol (HT) have been synthesised via Oxa-Pictet-Spengler reaction in high yields. Lipophilicity and antioxidant activity were determined to establish the structure-activity relationship of isochromans compared to HT, BHT and alpha-tocopherol. Antioxidant capacity was tested in two diff...
Article
To better understand the tolerance of strawberries (Fragaria vesca L.) to high CO2 in storage atmospheres, fermentation and cellular damage were investigated. Fruit were stored for 3 and 6 days at 0 ºC in the presence of different CO2 levels (0, 20 or 40%) with 20% O2. Changes in pyruvate decarboxylase (PDC) and alcohol dehydrogenase (ADH) gene exp...
Article
Coffee is widely consumed worldwide; therefore, the methylxanthines contained in coffee, mainly caffeine (CF), are among the most abundant bioactive compounds in our diet. In the present work, the bioavailability and metabolism of methylxanthines in a commercial soluble green/roasted coffee blend was studied. After a 3-day restriction of methylxant...
Article
A series of nitroderivatives has been synthetized from hydroxytyrosol, the natural olive oil phenol, to increase the assortment of compounds with putative effects against Parkinson disease. Nitrohydroxytyrosyl esters were obtained from nitrohydroxytyrosol using a chemo selective one-step, high yield, transesterification procedure. The antioxidant a...
Article
The intake of green coffee has been associated with a lower risk of diseases of oxidative etiology probably due to its high phenolic content. The present study investigated the effect of treating human HepG2 cells with different concentrations of a green coffee bean extract (GCBE) and its main hydroxycinnamic acids, 5-caffeoylquinic acid (5-CQA) an...
Article
Full-text available
Hydroxytyrosol (HT), a virgin olive oil phenolic phytochemical with proven health benefits, has been used to generate new lipophilic antioxidants to preserve fats and oils against autoxidation. The aim of this work is to comparatively evaluate the physiological effects of HT and its lipophilic derivatives, hydroxytyrosyl acetate (HT-Ac) and ethyl h...
Article
Dietary fibre (DF) obtained from Agave tequilana, which is rich in fructans and insoluble DF, and jamaica calyces (Hibiscus sabdariffa), which is rich in DF and phenolic compounds, were assessed as new potential functional ingredients using the hypercholesterolemic animal model. Wistar rats (200-250g) were divided into 3 groups (n=8) and fed with c...
Article
The use of carambola pomace as a raw material for the production of a high dietary fibre powder (HDFP) was investigated. A face-centred design was used to study the effects of extraction conditions, namely water-to-pomace ratio, time and temperature, on both reducing sugars (RS) and total extractable polyphenols (EPP) contents of fibre concentrate....
Article
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To assess whether antioxidant, anti-inflammatory and other cardio-protective effects attributed to cocoa are achieved when regularly consuming moderate amounts of a flavanol-rich soluble cocoa product, a non-randomized, controlled, crossover, free-living study was carried out in healthy (n = 24; 25.9 ± 5.6 years) and moderately hypercholesterolemic...
Article
To study the effect of mate (Ilex paraguariensis) on serum lipids and antioxidant status in normocholesterolaemic and hypercholesterolaemic rats. Triglycerides (TG), total, LDL- and HDL-cholesterol levels, total antioxidant capacity (FRAP and ABTS assays), malondialdehyde (MDA) and protein carbonyls were analysed in serum, and MDA, glutathione and...
Article
Full-text available
Cocoa products present great health potential due to their high content of polyphenols, mainly of flavanols. However, the antioxidant, anti-inflammatory and other health effects of regularly consuming cocoa products seem to depend on the intake and health status of the consumer, etc. and need to be further clarified. A randomised, controlled, cross...
Article
The anticarcinogenic activity of hydroxytyrosyl ethyl ether (HTy-Et) compared to its precursor hydroxytyrosol (HTy) has been studied in human Caco-2 colon adenocarcinoma cells. 451 and 977 genes were differentially expressed in Caco-2 cells exposed to HTy or HTy-Et for 24h, respectively, compared with untreated cells (P<0.005; FDR=0), using Affymet...
Article
The anticancer activity of hydroxytyrosyl acetate (HTy-Ac) has been studied in human colon adenocarcinoma cells. Gene expression of proteins involved in cell cycle (p21, p53, cyclin B1 and cyclin G2) and programmed cell death (BNIP3, BNIP3L, PDCD4 and ATF3), as well as phase I and phase II detoxifying enzymes CYPA1 and UGT1A10, were evaluated by RT...
Article
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Introduction: Papaya plant parts are endowed with various therapeutic functions. As of to date, there are still no report comparing the antioxidative and hepatoprotective potentials of the three widely eaten parts of papaya; the unripe, ripe fruits and leaves using human liver cell line. This study was thus undertaken to evaluate these properties o...
Article
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The health benefits of dietary fiber and polyphenols in reducing cardiovascular risk have been evidenced. Cocoa husks are a good source of both components and a considerable by-product. A cocoa product rich in cocoa fiber (CP) has been produced from cocoa husks and this study assessed whether its regular consumption may be a strategy to improve lip...
Article
Oxidative stress caused by oxygen radicals damages cellular DNA, proteins and lipids and is widely recognized as one of the causes of the development of chronic disease. There is substantial evidence that antioxidant food components have a protective role against oxidative stress-induced atherosclerosis, degenerative and age-related diseases, cance...
Article
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Dietary fibre is both preventive and therapeutic for bowel functional diseases. Soluble cocoa products are good sources of dietary fibre that may be supplemented with this dietary component. This study assessed the effects of regularly consuming two soluble cocoa products (A and B) with different non-starch polysaccharides levels (NSP, 15.1 and 22....
Article
The effects of virgin olive oil phenols, hydroxytyrosyl acetate (HTy-Ac) and hydroxytyrosol (HTy), on cell integrity and steady-state values of cellular redox status were assessed in HepG2 cells, as well as their potential protective effects against oxidative stress induced by tert-butyl hydroperoxide (t-BOOH). Direct treatment for 20 h with 0.5-10...
Article
Regular moderate wine consumption is often associated with reduced morbidity and mortality from a variety of chronic diseases in which inflammation is the root cause. This review is focused on three of the numerous bioactive compounds present in wine: resveratrol, hydroxytyrosol and melatonin. Resveratrol and hydroxytyrosol are polyphenols. Melaton...
Article
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Phlorotannins have received much attention due to their ecophysiological importance and potential applications in the biotechnology and food industries. Antioxidant activity studies in seaweeds have mainly focused on in vitro assays; however, there is a paucity of data regarding the effect of brown algal phlorotannins on living cultured cells. The...
Article
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The digestive stability of two natural antioxidant compounds present in virgin olive oil, hydroxytyrosol (HTy) and hydroxytyrosyl acetate (HTy-Ac) and a new series of hydroxytyrosyl ethers (methyl, ethyl and butyl hydroxytyrosyl ethers) was evaluated by a simulated digestion procedure. High recovery of all compounds after gastric digestion was obta...
Article
Preparation of tyrosyl and homovanillyl lipophilic derivatives was carried out as a response to the food industry's increasing demand for new synthetic lipophilic antioxidants. Tyrosyl and homovanillyl ethers were synthesized in high yields by a three-step procedure starting from tyrosol (Ty) and homovanillic alcohol (HMV). The antioxidant activity...
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Cocoa is a rich source of bioactive compounds with potential chemopreventive ability but up to date its effectiveness in animal models of colon carcinogenesis has not been addressed. Herein, we investigated the in vivo effect of a cocoa-rich diet in the prevention of azoxymethane (AOM)-induced colon cancer and the mechanisms involved. Our results s...