ABSTRACT
Resumen Introducción. Los edulcorantes son aditivos que se consumen en los alimentos. Pueden ser naturales (sacarosa y estevia) o artificiales (sucralosa). Actualmente, se consumen rutinariamente en múltiples productos, y sus efectos en la mucosa y la microbiota del intestino delgado aún son controversiales. Objetivo. Relacionar el consumo de edulcorantes y su efecto en el sistema inmunitario y la microbiota del intestino delgado en ratones CD1. Materiales y métodos. Se utilizaron 54 ratones CD1 de tres semanas de edad divididos en tres grupos: un grupo de tres semanas sin tratamiento, un grupo tratado durante seis semanas y un grupo tratado durante 12 semanas. Se les administró sacarosa, sucralosa y estevia. A partir del intestino delgado, se obtuvieron linfocitos B CD19+ y células IgA+, TGF-ß (Transforming Growth Factor-beta) o el factor de crecimiento transformador beta (TGF-beta), IL-12 e IL-17 de las placas de Peyer y de la lámina propia. De los sólidos intestinales se obtuvo el ADN para identificar las especies bacterianas. Resultados. Después del consumo de sacarosa y sucralosa durante 12 semanas, se redujeron las comunidades bacterianas, la IgA+ y el TGF-beta, se aumentó el CD19+, y además, se incrementaron la IL-12 y la IL-17 en las placas de Peyer; en la lámina propia, aumentaron todos estos valores. En cambio, con la estevia mejoraron la diversidad bacteriana y el porcentaje de linfocitos CD19+, y hubo poco incremento de IgA+, TGF-ß e IL-17, pero con disminución de la IL-17. Conclusión. La sacarosa y la sucralosa alteraron negativamente la diversidad bacteriana y los parámetros inmunitarios después de 12 semanas, en contraste con la estevia que resultó benéfica para la mucosa intestinal.
Abstract Introduction: Sweeteners are additives used in different foods. They can be natural (sucrose and stevia) or artificial (sucralose). Currently, they are routinely consumed in multiple products and their effects on the mucosa of the small intestine and its microbiota are still controversial. Objective: To relate the consumption of sweeteners and their effect on the immune system and the microbiota of the small intestine in CD1 mice. Materials and methods: We used 54 three-week-old CD1 mice divided into three groups in the experiments: 1) A group of three weeks without treatment, 2) a group treated for six weeks, and 3) a group treated for 12 weeks using sucrose, sucralose, and stevia. We obtained CD19+ B lymphocytes, IgA+ antibodies, transforming growth factor-beta (TGF-b), and interleukins 12 and 17 (IL-12 and -17) from Peyer's patches and lamina propria cells while DNA was obtained from intestinal solids to identify bacterial species. Results: After 12 weeks, sucrose and sucralose consumption caused a reduction in bacterial communities with an increase in CD19+, a decrease in IgA+ and TGF-b, and an increase in IL-12 and -17 in the Peyer's patches while in the lamina propria there was an increase in all parameters. In contrast, stevia led to an improvement in bacterial diversity and percentage of CD19+ lymphocytes with minimal increase in IgA+, TGF-b, and IL-12, and a decrease in IL-17. Conclusion: Sucrose and sucralose caused negative alterations in bacterial diversity and immune parameters after 12 weeks; in contrast, stevia was beneficial for the intestinal mucosa.
Subject(s)
Sweetening Agents , Gastrointestinal Microbiome , Sucrose , Stevia , Intestine, SmallABSTRACT
Aims: To know the effect of chronic commercial sweeteners consumption in lymphocytes of Peyer’s patches. Study Design: A prospective, longitudinal, comparative and experimental study. Place and Duration of Study: The study was conducted in the Nutrition Research Laboratory of the Faculty of Medicine of Universidad Autónoma del Estado de México (UAEMéx) between August 2018 and May 2019 and was approved by the Bioethics Committee. Materials and Methods: Two groups of male mice of different strains were used: 1) Balb/c and 2) CD1, both at 8 weeks-old age. The groups were divided into 4 subgroups: 1) Control (without sweetener), 2) Sucrose (table sugar, 41.66 mg/mL), and two groups of commercial sweeteners 3) Splenda® (sucralose 1.2%, with a concentration of 4.16 mg/mL), and 4) Svetia® (Steviol glycoside 0.025 g with a concentration of 4.16 mg/mL). The mice consumed the supplementation for 6 weeks. Also, were quantified plasma glucose, percentage of lymphocytes from Peyer’s patches, water and food consumption weekly. Results: Mice increased their body weight after 6 weeks of treatment. The animals of Control and Sucrose subgroups showed a significant body weight gain of 5 g compared with the Splenda® and Svetia® subgroups, which increased only 4 g. In the subgroup treated with Splenda®, the blood glucose was reduced significantly. Svetia® and Control groups consumed more water without sweetener. The differences in food consumption were between the subgroups, not between the strains. By the end, the percentage of lymphocytes from Peyer´s patches increased in the Sucrose subgroup but decreased significantly in other subgroups. Conclusion: The consumption of sweeteners may modify the lymphocyte population of Peyer's patches in the small intestine and this variation depends on the frequency of consumption the strain of the rodents and the type of sweetener.
ABSTRACT
Analizar epistemológicamente los problemas de salud requiere incorporar la epistemología a los programas de posgrado en ciencias de la salud. Con el propósito de caracterizar los campos problemáticos que fundamenten el diseño de un programa académico para el curso de epistemología en ciencias de la salud se realizó un estudio con el enfoque de la hermenéutica gadameriana en tres etapas. El punto de partida expone la concepción de hombre, conocimiento y epistemología. El horizonte de comprensión se elaboró con tendencias epistemológicas hegemónicas. La fusión de horizontes integró las características de los siguientes campos problemáticos: epistemología de las ciencias de la salud, lógica de las ciencias de la salud, tendencias epistemológicas en ciencias de la salud, problemas epistemológicos de las ciencias de la salud. Se concluye que los campos problemáticos descritos introducen al estudiante a la reflexión de su práctica científica mediante el análisis racional, axiológico y crítico.
Analyzing health problems from an epistemological point of view requires epistemology to be included on health sciences postgraduate courses programs. Aimed at characterizing the problematic fields used as basis for the design of a health sciences epistemology academic program, a study with an approach to Gadamer hermeneutics in three stages was carried out. The starting point shows man, knowledge and epistemology conceptions. The comprehension horizon was made with epistemological-dominant trends. The horizons merge included characteristics from the following problematic fields: health sciences epistemology, health sciences logic, epistemological trends in health sciences, health sciences epistemological problems. It was reached the conclusion that the described problematic fields introduce students to their scientific practice reflection through a rational, axiological and critical analysis.