Gut microbiota composition in himalayan and andean populations and its relationship with diet, lifestyle and adaptation to the high-altitude environment

Human populations living at high altitude evolved a number of biological adjustments to cope with a challenging environment characterised especially by reduced oxygen availability and limited nutritional resources. This condition may also affect their gut microbiota composition. Here, we explored the impact of exposure to such selective pressures on human gut microbiota by considering different ethnic groups living at variable degrees of altitude: the high-altitude Sherpa and low-altitude Tamang populations from Nepal, the high-altitude Aymara population from Bolivia, as well as a low-altitude cohort of European ancestry, used as control. We thus observed microbial profiles common to the Sherpa and Aymara, but absent in the low-altitude cohorts, which may contribute to the achievement of adaptation to high-altitude lifestyle and nutritional conditions. The collected evidences suggest that microbial signatures associated to these rural populations may enhance metabolic functions able to supply essential compounds useful for the host to cope with high altitude-related physiological changes and energy demand. Therefore, these results add another valuable piece of the puzzle to the understanding of the beneficial effects of symbiosis between microbes and their human host even from an evolutionary perspective

European registry on helicobacter pylori management: Effectiveness of first and second-line treatment in Spain

The management of Helicobacter pylori infection has to rely on previous local effectiveness due to the geographical variability of antibiotic resistance. The aim of this study was to evaluate the effectiveness of first and second-line H. pylori treatment in Spain, where the empirical prescription is recommended. A multicentre prospective non-interventional registry of the clinical practice of European gastroenterologists concerning H. pylori infection (Hp-EuReg) was developed, including patients from 2013 until June 2019. Effectiveness was evaluated descriptively and through a multivariate analysis concerning age, gender, presence of ulcer, proton-pump in-hibitor (PPI) dose, therapy duration and compliance. Overall, 53 Spanish hospitals were included, and 10, 267 patients received a first-line therapy. The best results were obtained with the 10-day bismuth single-capsule therapy (95% cure rate by intention-to-treat) and with both the 14-day bismuth-clarithromycin quadruple (PPI-bismuth-clarithromycin-amoxicillin, 91%) and the 14-day non-bismuth quadruple concomitant (PPI-clarithromycin-amoxicillin-metronidazole, 92%) therapies. Second-line therapies were prescribed to 2448 patients, with most-effective therapies being the triple quinolone (PPI-amoxicillin-levofloxacin/moxifloxacin) and the bismuth-levofloxacin quadruple schemes (PPI-bismuth-levofloxacin-amoxicillin) prescribed for 14 days (92%, 89% and 90% effective-ness, respectively), and the bismuth single-capsule (10 days, 88.5%). Compliance, longer duration and higher acid inhibition were associated with higher effectiveness. “Optimized” H. pylori therapies achieve over 90% success in Spain

Home enteral nutrition in children: a 10 year experience with 304 pediatric patients

Background & aims: Home enteral nutrition is used increasingly in pediatric populations. Our objective was to describe the profile of pediatric patients requiring this treatment. Material and methods: All patients under 18 years old requiring treatment with home enteral nutrition between January 1995 and December 2004 were analyzed retrospectively. Results: 304 patients were studied (157 boys). The mean age at the start of treatment was 4.02 ± 4.09 years, median of 2.5 years; 28% of all patients were under 1 year. The main indications were oncological disease in 91 patients (29.9%) and digestive diseases in 84 (27.6%). There were significant differences depending on the clinical diagnosis for the start age, type of access, infusion regime and formula prescribed. Nutrients were delivered by nasogastric tube in 218 patients (71.7%). Overnight enteral nutrition was the preferred infusion regime in 155 patients (51%). Adult or pediatric polymeric formulas were mostly prescribed in 190 patients (62.5%). The mean treatment duration was 306 ± 544 days. Conclusion: In our series, enteral support usually begins at an early age. Its characteristics varied depending on patient pathology. Knowledge of the pediatric patient profile is important to design the most effective strategy for home enteral nutrition

Iodothyronine 5′-deiodinase activity in rat brown adipose tissue during development

Iosothyronine 5′-deiodinase activity in rat brown adipose tissue has a characteristic pattern of developmental changes that is completely different from that of the liver. Fetal brown fat exhibits an extremely high iodothyronine 5′-deiodinase activity that is approx. 10-fold that in adult rats. Even though brown fat iodothyronine 5′-deiodinase activity falls suddenly at birth, there is a new peak in the activity around days 5–7 of life, whereas it remaines very low afterwards. Just after birth, brown adipose tissue iodothyronine 5′-deiodinase activity is already capable of stimulation by noradrenaline. The postnatal peak in brown fat iodothyronine 5′-deiodinase correlates with the known increase in the thermogenic activity of the tissue in the neonatal rat, thus reinforcing the suggestion that local 3′,3,5-triiodothyronine generation could be an important event related to thermogeneis in brown adispose tissue. However, the high fetal activity was only slightly related to the thermogenic activity of brown fat. Moreover, the increased iodothyronine 5′-deiodinase activity of brown adipose tissue during fetal and neonatal life suggests a substantial contribution by brown fat in the overall extrahydroidal 3′,3,5-triiodothyronine production in these physiological periods. © 1987.Peer Reviewe

Home enteral nutrition in children: a 10 year experience with 304 pediatric patients Nutrición enteral domiciliara en niños: 10 años de experiencia con 304 pacientes

Background & aims: Home enteral nutrition is used increasingly in pediatric populations. Our objective was to describe the profile of pediatric patients requiring this treatment. Material and methods: All patients under 18 years old requiring treatment with home enteral nutrition between January 1995 and December 2004 were analyzed retrospectively. Results: 304 patients were studied (157 boys). The mean age at the start of treatment was 4.02 ± 4.09 years, median of 2.5 years; 28% of all patients were under 1 year. The main indications were oncological disease in 91 patients (29.9%) and digestive diseases in 84 (27.6%). There were significant differences depending on the clinical diagnosis for the start age, type of access, infusion regime and formula prescribed. Nutrients were delivered by nasogastric tube in 218 patients (71.7%). Overnight enteral nutrition was the preferred infusion regime in 155 patients (51%). Adult or pediatric polymeric formulas were mostly prescribed in 190 patients (62.5%). The mean treatment duration was 306 ± 544 days. Conclusion: In our series, enteral support usually begins at an early age. Its characteristics varied depending on patient pathology. Knowledge of the pediatric patient profile is important to design the most effective strategy for home enteral nutrition.Introducción y objetivos: La nutrición enteral domiciliaria es un soporte nutricional cada vez más utilizado en población pediátrica. Nuestro objetivo ha sido describir el perfil de un grupo de pacientes pediátricos que precisaron este tratamiento. Material y métodos: Se analizaron retrospectivamente todos los pacientes menores de 18 años que precisaron tratamiento con nutrición enteral domiciliaria entre enero 1995 y diciembre 2004. Resultados: Se estudiaron 304 pacientes (157 niños). La edad media al inicio del tratamiento fue de 4,02 ± 4,09 años, con una mediana de 2,5 años; un 28% de los pacientes eran menores de 1 año. Las indicaciones principales fueron la enfermedad oncológica en 91 pacientes (29,9%) y la digestiva en 84 (27,6%). Se encontraron diferencias significativas en función del diagnóstico clínico para la edad de inicio, el tipo de acceso, el modo de administración y la fórmula prescrita. El tipo de acceso más utilizado fue la sonda nasogástrica en 218 pacientes (71,7%). El régimen de infusión más utilizado fue la nutrición enteral nocturna en 155 pacientes (51%). Se prescribió principalmente fórmula polimérica de adultos o pediátrica en 190 pacientes (62,5%). La duración media del tratamiento fue de 306 ± 544 días. Conclusión: En nuestra serie, el soporte enteral suele iniciarse a edades muy tempranas. Sus características variaron en función de la patología del paciente. Conocer el perfil del paciente pediátrico es importante para diseñar la estrategia más eficaz en el uso de la nutrición enteral domiciliaria

Home enteral nutrition in children: a 10 year experience with 304 pediatric patients

Background & aims: Home enteral nutrition is used increasingly in pediatric populations. Our objective was to describe the profile of pediatric patients requiring this treatment. Material and methods: All patients under 18 years old requiring treatment with home enteral nutrition between January 1995 and December 2004 were analyzed retrospectively. Results: 304 patients were studied (157 boys). The mean age at the start of treatment was 4.02 ± 4.09 years, median of 2.5 years; 28% of all patients were under 1 year. The main indications were oncological disease in 91 patients (29.9%) and digestive diseases in 84 (27.6%). There were significant differences depending on the clinical diagnosis for the start age, type of access, infusion regime and formula prescribed. Nutrients were delivered by nasogastric tube in 218 patients (71.7%). Overnight enteral nutrition was the preferred infusion regime in 155 patients (51%). Adult or pediatric polymeric formulas were mostly prescribed in 190 patients (62.5%). The mean treatment duration was 306 ± 544 days. Conclusion: In our series, enteral support usually begins at an early age. Its characteristics varied depending on patient pathology. Knowledge of the pediatric patient profile is important to design the most effective strategy for home enteral nutrition