Examinando por Autor "Bagüés, Ana"

Mostrando 1 - 4 de 4

Changes in Fatty Acid Dietary Profile Affect the Brain-Gut Axis Functions of Healthy Young Adult Rats in a Sex-Dependent Manner.
(Nutrients, 2021) Jacenik, Damian; Bagüés, Ana; López - Gómez, Laura; López - Tofiño, Yolanda; Iriondo-DeHond, Amaia; Serra, C; Banovcanová, L; Gálvez-Robleño, Carlos; Fichna, Jakub; Del Castillo, Maria Dolores; Uranga, Jose Antonio; Abalo, Raquel
Dietary modifications, including those affecting dietary fat and its fatty acid (FA) composition, may be involved in the development of brain-gut axis disorders, with different manifestations in males and females. Our aim was to evaluate the impact of three purified diets with different FA composition on the brain-gut axis in rats of both sexes. Male and female Wistar rats fed a cereal-based standard diet from weaning were used. At young adult age (2-3 months old), animals were divided into three groups and treated each with a different refined diet for 6 weeks: a control group fed on AIN-93G diet containing 7% soy oil (SOY), and two groups fed on AIN-93G modified diets with 3.5% soy oil replaced by 3.5% coconut oil (COCO) or 3.5% evening primrose oil (EP). Different brain-gut axis parameters were evaluated during 4-6 weeks of dietary intervention. Compared with SOY diet (14% saturated FAs, and 58% polyunsaturated FAs), COCO diet (52.2% saturated FAs and 30% polyunsaturated FAs) produced no changes in brain functions and minor gastrointestinal modifications, whereas EP diet (11.1% saturated FAs and 70.56% polyunsaturated FAs) tended to decrease self-care behavior and colonic propulsion in males, and significantly increased exploratory behavior, accelerated gastrointestinal transit, and decreased cecum and fecal pellet density in females. Changes in FA composition, particularly an increase in ω-6 polyunsaturated FAs, seem to facilitate the development of brain-gut axis alterations in a sex-dependent manner, with a relatively higher risk in females.
Evaluation of the Effects of Instant Cascara Beverage on the Brain-Gut Axis of Healthy Male and Female Rats.
(Nutrients, 2023) Gallego-Barceló, Paula; Bagüés, Ana; Benítez-Álvarez, David; López - Tofiño, Yolanda; Gálvez-Robleño, Carlos; López - Gómez, Laura; Del Castillo, Maria Dolores; Abalo, Raquel
Instant cascara (IC) is a sustainable beverage obtained from dried coffee cherry pulp, rich in nutrients and bioactive compounds. The present research aimed to determine the effects of IC on general health and brain-gut axis parameters of healthy female and male rats. Wistar rats were exposed to IC (10 mg/mL) in their drinking water for 3 weeks. Body weight and solid and liquid intakes were monitored as indicators of food safety. Gastrointestinal transit was radiographically evaluated one day (acute) and 3 weeks (chronic) after the start of IC exposure. Locomotor activity, anxiety, and anhedonia of the animals after 3 weeks of treatment was also studied. Overall, compared to water-exposed animals, IC significantly increased food intake in males (p < 0.0001) and liquid intake in females (p < 0.05) without changes in body weight in either case. IC did not significantly modify gastrointestinal motility parameters after its acute or repeated intake and did not cause any significant behavioral alterations in males or females (p > 0.05). In conclusion, repeated intake of IC at the studied concentration did not negatively affect brain-gut axis functions of healthy male and female rats. Anxiety behavior, diarrhea, constipation, abnormal weight modifications, or other typical effects of toxicity were not observed in animals treated with the new powdered beverage, suggesting its food safety under the studied conditions.
Preclinical models of irritable bowel syndrome.
(Academic Press, 2020) López-Gómez, Laura; Bagüés, Ana; Uranga Ocio, José Antonio; Abalo Delgado, Raquel
Irritable bowel syndrome (IBS) is a disorder of the gut-brain interaction, highly prevalent and impactful. Visceral hypersensitivity and alterations of colonic motility and defecation are definitory, but other features (increased intestinal permeability, anxiety, depression) also occur throughout the life of IBS patients. In this chapter, we will first review the different animal models that have been developed in an attempt to mimic IBS and its symptoms, which may vary according to the different underlying etiology. Thereafter, we will review the techniques and models that are used in vitro. Whereas in vivo models constitute the final preclinical step in the search of new effective and safe treatments, in vitro studies offer essential information on molecular mechanisms underlying the disease, which may open the gate to finding new treatment targets. Both approaches are therefore complementary and need to be considered for successful preclinical research on IBS.
Radiographic assessment of the impact of sex and the circadian rhythm-dependent behaviour on gastrointestinal transit in the rat.
(Laboratory Animals, 2022) Gálvez-Robleño, Carlos; López - Tofiño, Yolanda; López - Gómez, Laura; Bagüés, Ana; Soto-Montenegro, Maria Luisa; Abalo, Raquel
Relatively little is known about the influence of sex and the circadian rhythm on gastrointestinal transit. However, these factors could have an important impact on aspects such as digestion, oral absorption of drugs or the clinical manifestation of gastrointestinal diseases, among others. Remarkably, preclinical models have scarcely taken these factors into consideration. In this study, we assessed the gastrointestinal transit of young adult Wistar Han rats of both sexes, under normal and inverted light cycle. To do this, serial radiographs were taken for 24 h (T0-T24) after intragastric barium administration and subsequently analysed to construct transit curves for each gastrointestinal region. Under a normal light cycle, transit curves were similar, except for a slower transit in females compared with males from T8 to T24. Under the inverted cycle, there was a significant acceleration in stomach emptying (similar in both sexes), emptying of the small intestine (even faster in females) and filling of the caecum and colon (which was also even faster in females). This study confirms, using X-ray non-invasive methods for the first time, that both sex and circadian rhythm (probably through its effect on behaviour) influence gastrointestinal transit in laboratory animals.