Exercise training and DNA methylation profile in post-bariatric women: Results from an exploratory study.

Exercise training and bariatric surgery have been shown to independently modulate DNA methylation profile in clusters of genes related to metabolic and inflammatory pathways. This study aimed to investigate the effects of a 6-month exercise training program on DNA methylation profile in women who underwent bariatric surgery. In this exploratory, quasi-experimental study, we analyzed DNA methylation levels by array technology in eleven women who underwent Roux-en-Y Gastric Bypass and a 6-month, three-times-a-week, supervised exercise training program. Epigenome Wide Association Analysis showed 722 CpG sites with different methylation level equal to or greater than 5% (P < 0.01) after exercise training. Some of these CpGs sites were related to pathophysiological mechanisms of inflammation, specially Th17 cell differentiation (FDR value < 0.05 and P < 0.001). Our data showed epigenetic modification in specific CpG sites related to Th17 cell differentiation pathway in post-bariatric women following a 6-months exercise training program.

Exercise training modifies the whole blood DNA methylation profile in middle-aged and older women.

This is a longitudinal single-arm clinical trial aimed to investigate whether exercise training would modify the whole blood methylation profile in healthy women. A total of 45 subjects were engaged in an exercise training protocol during a 14-wk follow up, consisting of aerobic cardiorespiratory and muscle strength exercises. Subjects were evaluated at baseline (PRE), after 7 wk of exercise training (POST 7), and after 14 wk of exercise training (POST 14). Functional primary outcomes included anthropometric, blood pressure, biochemical measurements, physical tests, and global health assessments. Blood samples were collected at each time point to determine the methylation profile using a DNA methylation array technique screening up to 850k different sites. Exercise training decreased blood pressure and triglyceride levels and enhanced physical performance, including upper- and lower-body maximum strength. Moreover, exercise training improved markers of quality of life. In the array analysis, 14 wk of exercise training changed the methylation of more than 800 sites. Across these differentially methylated sites, we found that differentially methylated sites in the promoter region were more hypermethylated after exercise training, suggesting that this hypermethylation process may affect the transcription process. When inputting the differentially methylated sites in pathway analysis, we found several metabolic pathways, including AMPK signaling, TGF-ß signaling, and insulin signaling. This study demonstrates that exercise training promotes a robust change in the whole blood methylation profile and provides new insights into the key regulators of exercise-induced benefits.NEW & NOTEWORTHY We have shown that exercise training lowers blood pressure and triglyceride levels, improves physical performance, and improves quality of life in middle-aged and elderly women. Regarding epigenetic data, we noticed that more than 800 sites are differentially methylated in whole blood after physical training. We emphasize that the differentially methylated sites in the promoter region are more hypermethylated after physical training. In addition, this study shows that key members of metabolic pathways, including AMPK signaling, TGF-ß signaling, and insulin signaling, are among the genes hypermethylated after physical exercise in older women.

Sleeve Gastrectomy with Pyloroplasty in Wistar Rats: Assessment of Gastric Emptying, Intestinal Transit, and Possible Duodenogastric Alkaline Reflux.

BACKGROUND: Studies indicate sleeve gastrectomy (SG) as a factor of aggravation or even emergence of symptoms of gastroesophageal reflux disease. Accelerated gastric emptying is described as a mitigating factor. SG may be potentiated by adding a pyloroplasty, although with the potential risk of resulting in duodenogastric alkaline reflux. The objective was to standardize sleeve gastrectomy with pyloroplasty in rats, analyze the complementation in terms of mortality and weight evolution, and conduct assessments on gastric emptying, intestinal transit, and genesis of possible duodenogastric reflux. METHODS: Ninety-three male Wistar rats were divided into a pilot study (standardization of the surgical technique and the scintigraphic study), and the main study. They were then subdivided into the SHAM group, the sleeve gastrectomy (SG) group, and the sleeve gastrectomy with pyloroplasty (SGP) group. After 3 months, the animals were submitted to two scintigraphic experiments and histological analysis of gastric biopsies. RESULTS: The surgical groups (SG and SGP) lost initially more weight than the SHAM group, and the gastric emptying and intestinal transit in the first were more accelerated. However, no difference was found between the SG and SGP groups. Scintigraphic and histological analyses did not reveal statistical differences among the SG and SGP groups regarding gastroesophageal and duodenogastric refluxes. CONCLUSIONS: Pyloroplasty did not affect weight reduction or increase duodenogastric reflux, after three postoperative months in this animal model of sleeve gastrectomy.

Lifestyle Interventions and Weight Management in Systemic Lupus Erythematosus Patients: A Systematic Literature Review and Metanalysis.

Background: We aimed to identify and describe different types of lifestyle interventions primarily or secondarily focused on weight loss in SLE patients. Methods: A systematic search of controlled trials published until June 2021 that assigned adults patients after dietary or exercise intervention resulted in 248 studies initially screened. Results: Six studies with seven interventions (3 dietary and 4 exercise training programs) fulfilled the eligibility criteria and were included in the meta-analysis with a median of age 35.8 (31.3 to 49.0 years); median of BMI 26.6 (25.2 to 33.6 kg/m2). After six to twelve weeks of diet or exercise program, no differences were observed in body weight [-1.539 (-4.482 to 1.405) kg (CI 95%), p = 0.306]. Also, a subgroup analysis also revelated no body weight difference following dietary intervention [-3.561 (-9.604 to 2.481) kg (CI 95%), p = 0.248] or exercise intervention [-0.910 (-4.279 to 2.460) kg (CI 95%), p = 0.597]. Conclusion: The results showed that different protocols of exercise intervention or diets were not effective to reduce body weight in patients with SLE. However, only one of the selected trials had a specific study design and protocol focusing on weight loss management.

Adipose tissue and blood leukocytes ACE2 DNA methylation in obesity and after weight loss.

BACKGROUND: Obesity was consistently associated with a poor prognosis in patients with COVID-19. Epigenetic mechanisms were proposed as the link between obesity and comorbidities risk. AIM: To evaluate the methylation levels of angiotensin-converting enzyme 2 (ACE2) gene, the main entry receptor of SARS-CoV-2, in different depots of adipose tissue (AT) and leukocytes (PBMCs) in obesity and after weight loss therapy based on a very-low-calorie ketogenic diet (VLCKD), a balanced hypocaloric diet (HCD) or bariatric surgery (BS). MATERIALS AND METHODS: DNA methylation levels of ACE2 were extracted from our data sets generated by the hybridization of subcutaneous (SAT) (n = 32) or visceral (VAT; n = 32) adipose tissue, and PBMCs (n = 34) samples in Infinium HumanMethylation450 BeadChips. Data were compared based on the degree of obesity and after 4-6 months of weight loss either by following a nutritional or surgical treatment and correlated with ACE2 transcript levels. RESULTS: As compared with normal weight, VAT from patients with obesity showed higher ACE2 methylation levels. These differences were mirrored in PBMCs but not in SAT. The observed obesity-associated methylation of ACE2 was reversed after VLCKD and HCD but not after BS. Among the studied CpG sites, cg16734967 and cg21598868, located at the promoter, were the most affected and correlated with BMI. The observed DNA methylation pattern was inversely correlated with ACE2 expression. CONCLUSION: Obesity-related VAT shows hypermethylation and downregulation of the ACE2 gene that is mirrored in PBMCs and is restored after nutritional weight reduction therapy. The results warrant the necessity to further evaluate its implication for COVID-19 pathogenesis.

The intersection between COVID-19 and obesity in the context of an emerging country.

BACKGROUND & AIMS: The worldwide outbreak of the coronavirus disease 2019 (COVID-19) has already caused a substantial public health burden. Increasing number of studies linked obesity to more severe COVID-19 consequence and mortality, challenging health systems worldwide, especially in emerging countries like Brazil. Herein, we aimed to search the literature and present the current intersection between obesity and COVID-19 in the Brazilian population. METHODS: One hundred twenty-five articles were initially searched after duplicate removal, and nine were finally included in our analysis. RESULTS: Our findings emphasized the magnitude of COVID-19 infection in Brazil and the impact of obesity as a risk factor that aggravates the prognosis of outpatients or hospitalized patients. We also demonstrated social aspects of COVID-19 that could act enhancing the obesity condition in Latin American countries. CONCLUSIONS: A more careful look at the available data could help to understand better the dynamic between obesity and COVID-19, focusing on the Brazilian population and could eventually guide management strategies and therapies for COVID-19 in the future.

Beta-alanine fails to improve on 5000 m running time despite increasing PAT1 expression in long-distance runners.

BACKGROUND: Beta-alanine has become a dietary supplement widely used by athletes due to its ergogenic effect. However, there is still no consensus on the performance benefit of beta-alanine on exercise lasting longer than ten minutes. The present study aimed to evaluate the effect of beta-alanine supplementation on running performance and the expression of TauT and PAT1. METHODS: This double-blind, randomized study enrolled 16 long-distance runners (37±8 years) who were randomly allocated to two groups: placebo (PLA) and beta-alanine (BA) (4.8 g/day 1) for four weeks. Maximal oxygen consumption, anthropometry, body composition, and food intake were determined. Before and after the intervention, the athletes undertook a 5000 m running time trial. Venous blood (TauT and PAT1 expressions) and ear lobe capillary blood (lactate) collected before and after exercise. Between tests, we monitored the training variables. RESULTS: The results were analyzed by t-tests and an ANOVA of repeated measures, with Sidak's post hoc (P<0.05). PLA exhibited lower body fat than BA (8.7±2.2 vs. 11.5±2.8%, P=0.04). After supplementation, there was an increase in PAT1 expression in BA when compared to PLA (1.17±0.47 vs. 0.77±0.18, P=0.04). No significant differences were shown for the 5000 m running time in PLA (PRE: 1128±72; POST: 1123±72s) and BA (PRE: 1107±95; POST: 1093±86s). CONCLUSIONS: Although beta-alanine supplementation increased PAT1 expression, there was no statistically significant improvement in 5000 m running performance. However, individual responses should be considered as the BA showed a higher delta than the PLA.

Weight loss normalizes enhanced expression of the oncogene survivin in visceral adipose tissue and blood leukocytes from individuals with obesity.

BACKGROUND/OBJECTIVES: Survivin is an oncogene associated with a decrease in apoptosis, an increase in tumor growth, and poor clinical outcome of diverse malignancies. A correlation between obesity, cancer, and survivin is reported in the literature. To date, the impact of weight loss on change in survivin levels is understudied. This study was aimed at: (1) comparing survivin levels in adipose tissue (AT) from lean and obese animal models and evaluating changes after weight loss induced by energy restriction and/or exercise; (2) comparing survivin levels in normal weighted and obese humans and evaluating changes in survivin levels after weight loss induced by a very-low-calorie ketogenic diet (VLCKD) or bariatric surgery in AT and/or blood leukocytes (PBL/PBMCs). SUBJECTS/METHODS: Survivin expression was evaluated in subcutaneous (SAT) and visceral (VAT) AT derived from animal models of monogenic (Zucker rats) and diet-induced obesity (Sprague Dawley rats and C57BL/6J mice) and after a 4-week weight-loss protocol of energy restriction and/or exercise. Plasma was used to measure the inflammatory status. Survivin expression was also evaluated in PBMCs from patients with obesity and compared with normal weight, in PBLs after VLCKD, and in SAT and/or PBLs after bariatric surgery. RESULTS: Survivin expression was specifically higher in VAT from obese that lean animals, without differences in SAT. It decreased after weight loss induced by energy restriction and correlated with adiposity and inflammatory markers. In humans, the correlation between being obese and higher levels of survivin was confirmed. In obese subjects, survivin levels were reduced following weight loss after either VLCKD or bariatric surgery. Particularly, a decrease in PBMCs expression (not in SAT one) was found after surgery. CONCLUSIONS: Weight loss is effective in decreasing survivin levels. Also, PBL/PBMC should be regarded as appropriate mirror of survivin levels in VAT for the identification of an obesity-related protumoral microenvironment.

Changes in DNA Methylation and Gene Expression of Insulin and Obesity-Related Gene PIK3R1 after Roux-en-Y Gastric Bypass.

Weight regulation and the magnitude of weight loss after a Roux-en-Y gastric bypass (RYGB) can be genetically determined. DNA methylation patterns and the expression of some genes can be altered after weight loss interventions, including RYGB. The present study aimed to evaluate how the gene expression and DNA methylation of PIK3R1, an obesity and insulin-related gene, change after RYGB. Blood samples were obtained from 13 women (35.9 ± 9.2 years) with severe obesity before and six months after surgical procedure. Whole blood transcriptome and epigenomic patterns were assessed by microarray-based, genome-wide technologies. A total of 1966 differentially expressed genes were identified in the pre- and postoperative periods of RYGB. From these, we observed that genes involved in obesity and insulin pathways were upregulated after surgery. Then, the PIK3R1 gene was selected for further RT-qPCR analysis and cytosine-guanine nucleotide (CpG) sites methylation evaluation. We observed that the PI3KR1 gene was upregulated, and six DNA methylation CpG sites were differently methylated after bariatric surgery. In conclusion, we found that RYGB upregulates genes involved in obesity and insulin pathways.

The effects of bariatric surgery on clinical profile, DNA methylation, and ageing in severely obese patients.

BACKGROUND: Severe obesity is a growing, worldwide burden and conventional therapies including radical change of diet and/or increased physical activity have limited results. Bariatric surgery has been proposed as an alternative therapy showing promising results. It leads to substantial weight loss and improvement of comorbidities such as type 2 diabetes. Increased adiposity is associated with changes in epigenetic profile, including DNA methylation. We investigated the effect of bariatric surgery on clinical profile, DNA methylation, and biological age estimated using Horvath's epigenetic clock. RESULTS: To determine the impact of bariatric surgery and subsequent weight loss on clinical traits, a cohort of 40 severely obese individuals (BMI = 30-73 kg/m2) was examined at the time of surgery and at three follow-up visits, i.e., 3, 6, and 12 months after surgery. The majority of the individuals were women (65%) and the mean age at surgery was 45.1 ± 8.1 years. We observed a significant decrease over time in BMI, fasting glucose, HbA1c, HOMA-IR, insulin, total cholesterol, triglycerides, LDL and free fatty acids levels, and a significant small increase in HDL levels (all p values < 0.05). Epigenome-wide association analysis revealed 4857 differentially methylated CpG sites 12 months after surgery (at Bonferroni-corrected p value < 1.09 × 10-7). Including BMI change in the model decreased the number of significantly differentially methylated CpG sites by 51%. Gene set enrichment analysis identified overrepresentation of multiple processes including regulation of transcription, RNA metabolic, and biosynthetic processes in the cell. Bariatric surgery in severely obese patients resulted in a decrease in both biological age and epigenetic age acceleration (EAA) (mean = - 0.92, p value = 0.039). CONCLUSIONS: Our study shows that bariatric surgery leads to substantial BMI decrease and improvement of clinical outcomes observed 12 months after surgery. These changes explained part of the association between bariatric surgery and DNA methylation. We also observed a small, but significant improvement of biological age. These epigenetic changes may be modifiable by environmental lifestyle factors and could be used as potential biomarkers for obesity and in the future for obesity related comorbidities.

Green tea supplementation improves oxidative stress biomarkers and modulates IL-6 circulating levels in obese women / La suplementación con té verde mejora los biomarcadores del estrés oxidativo y modula los niveles de IL-6 de la circulación en mujeres obesas

Introduction: obesity is associated with high levels of oxidative stress (OS) and inflammation. There is a lot of evidence that some polyphenols, such as green tea, have a positive impact on the OS state and consecutively, on inflammation. Objectives: the purposes of this study were: a) evaluate OS biomarkers in both obese and normal weight women; and b) evaluate if green tea supplementation has an impact on OS and inflammatory cytokine biomarkers of obese women. Methods: we evaluated obese (body mass index [BMI] = 40 kg/m²) and normal weight (BMI between 18.5 and 24.9 kg/m²) women. Blood samples were used to access malondialdehyde (MDA), trolox equivalent antioxidant capacity (TEAC) and inflammatory cytokines. We randomly chose obese patients (18 individuals) and then gave them green tea supplementation for eight weeks. Statistical analysis included the Shapiro-Wilk, Wilcoxon, independent and paired t tests; p < 0.05 were considered as significant. Results: we enrolled 42 obese (BMI: 48.2 ± 9.3kg/m2) and 21 normal weight (BMI: 22.5 ± 2 kg/m2) women with an average age of 36.2 ± 9.1 years old. The serum levels of MDA were higher in obese (2.52 ± 0.31 µmol/l) than in eutrophic women (2.13 ± 0.26 µmol/l; p = 0.000). On the other hand, lower TEAC values were observed in the obese (0.75 ± 0.06 mM/l) than in the eutrophic group (0.78 ± 0.04 mM/l; p = 0.009). After the green tea intervention, MDA decreased 4.7% and TEAC increased 10%. Interleukin-6 (IL-6) serum levels decreased 12.7% after treatment (p = 0.03). Conclusions: a) the obese group had lower antioxidant capacity than eutrophic; and b) green tea supplementation ameliorated TEAC and MDA and reduced serum levels of IL-6 in obese women

Introducción: la obesidad se asocia con altos niveles de estrés oxidativo (EO) e inflamación. Existe mucha evidencia de que algunos polifenoles, como el té verde, tienen un impacto positivo en el estado del EO y, consecutivamente, en la inflamación. Objetivos: los propósitos de este estudio fueron: a) evaluar los biomarcadores de EO en mujeres obesas y de peso normal; y b) evaluar si la suplementación con té verde tiene un impacto en el EO y biomarcadores de citoquinas inflamatorias de las mujeres obesas. Métodos: evaluamos mujeres obesas (índice de masa corporal [IMC] = 40 kg/m²) y con peso normal (IMC entre 18,5 y 24,9 kg/m²). Se utilizaron muestras de sangre para determinar el malondialdehído (MDA), la capacidad antioxidante equivalente de trolox (TEAC) y las citoquinas inflamatorias. Elegimos al azar pacientes obesas (18 individuos) y luego les dimos suplementos de té verde durante ocho semanas. El análisis estadístico incluyó las pruebas de Shapiro-Wilk, Wilcoxon, t pareadas e independientes; p < 0,05 fueron considerados como significativos. Resultados: se reclutaron 42 mujeres obesas (IMC: 48,2 ± 9,3 kg/m2) y 21 de peso normal (IMC: 22,5 ± 2 kg/m2) con un promedio de edad de 36,2 ± 9,1 años. Los niveles séricos de MDA fueron más altos en las personas obesas (2,52 ± 0,31 µmol/L) que en las mujeres eutróficas (2,13 ± 0,26 µmol/L; p = 0,000). Por otro lado, se observaron valores TEAC más bajos en los obesos (0,75 ± 0,06 mM/L) que en el grupo eutrófico (0,78 ± 0,04 mM/L; p = 0,009). Después de la intervención con té verde, la MDA disminuyó 4.7% y el TEAC aumentó 10%. Los niveles séricos de interleucina-6 (IL-6) disminuyeron 12.7% después del tratamiento (p = 0,03). Conclusiones: a) mujeres obesas tienen menor capacidad antioxidante que las eutrófica; y b) la suplementación con té verde mejora TEAC y MDA y redujo los niveles séricos de IL-6 en mujeres obesas

INSIG2 gene polymorphism is associated with higher blood pressure and triglyceride levels in Brazilian obese subjects / El polimorfismo del gen INSIG2 se asocia con una mayor presión sanguínea y niveles de triglicéridos en sujetos obesos brasileños

Objective: this study aimed to evaluate the association between polymorphisms of INSIG, PCSK9 and FTO genes with anthropometric, biochemical characteristics and presence of metabolic syndrome in patients with severe obesity. Material and methods: the present study enrolled 150 patients with grade II or III obesity, who were submitted to nutritional assessment, blood pressure measurement and peripheral blood collection. INSIG2 (rs75666605), PCSK9 (rs505151), and FTO (rs9939609) polymorphisms were genotyped using TaqMan Pre-Designed SNP Genotyping Assays probes in real time polymerase chain reaction (PCR). The experimental data are processed in SPß Statistics 22.0 (p < 0.05). Results: in this study, 72.2% of obese subjects had metabolic syndrome (MS). There was a higher prevalence of AA (86.9%), CG (51.1%) and AT (46.2%) genotypes for the PCSK9, INSIG2 and FTO polymorphisms, respectively. There was no association of these polymorphisms with the prevalence of MS (p > 0.05). On the other hand, individuals with at least one variant allele (G) for the INSIG2 gene had higher triglycerides levels, systolic and diastolic blood pressure (p < 0.05). Conclusions: the polymorphism rs7566605 of the INSIG2 gene is associated with higher triglycerides levels and blood pressure values, which are also considered as risk factors for the development of MS

Objetivo: este estudio tuvo como objetivo evaluar la asociación entre polimorfismos de los genes INSIG, PCSK9 y FTO con las características antropométricas, bioquímicas y la presencia de síndrome metabólico (SM) en pacientes con obesidad grave. Material y métodos: el presente estudio incluyó 150 pacientes con obesidad de grado II o III, que fueron sometidos a evaluación nutricional, medición de la presión arterial y extracción de sangre periférica. Los polimorfismos INSIG2 (rs75666605), PCSK9 (rs505151) y FTO (rs9939609) fueron genotipados utilizando sondas TaqMan Pre-Designed SNP Genotyping Assays en la reacción en cadena de la polimerasa en tiempo real (PCR). Los datos experimentales se procesan en SPß Statistics 22.0 (p < 0,05). Resultados: en este estudio, el 72,2% de los sujetos obesos tenían síndrome metabólico (EM). Hubo una mayor prevalencia de genotipos AA (86,9%), CG (51,1%) y AT (46,2%) para los polimorfismos PCSK9, INSIG2 y FTO, respectivamente. No hubo asociación de estos polimorfismos con la prevalencia de SM (p > 0,05). Por otro lado, los individuos con al menos una variante de alelo (G) para el gen INSIG2 tenían niveles más altos de triglicéridos, presión arterial sistólica y diastólica (p < 0,05). Conclusiones: el polimorfismo rs7566605 del gen INSIG2 se asocia con niveles más altos de triglicéridos y valores de presión arterial, que también se consideran factores de riesgo para el desarrollo del síndrome metabólico

INSIG2 gene polymorphism is associated with higher blood pressure and triglyceride levels in Brazilian obese subjects.

INTRODUCTION: Objective: this study aimed to evaluate the association between polymorphisms of INSIG, PCSK9 and FTO genes with anthropometric, biochemical characteristics and presence of metabolic syndrome in patients with severe obesity. Material and methods: the present study enrolled 150 patients with grade II or III obesity, who were submitted to nutritional assessment, blood pressure measurement and peripheral blood collection. INSIG2 (rs75666605), PCSK9 (rs505151), and FTO (rs9939609) polymorphisms were genotyped using TaqMan Pre-Designed SNP Genotyping Assays probes in real time polymerase chain reaction (PCR). The experimental data are processed in SPSS Statistics 22.0 (p < 0.05). Results: in this study, 72.2% of obese subjects had metabolic syndrome (MS). There was a higher prevalence of AA (86.9%), CG (51.1%) and AT (46.2%) genotypes for the PCSK9, INSIG2 and FTO polymorphisms, respectively. There was no association of these polymorphisms with the prevalence of MS (p > 0.05). On the other hand, individuals with at least one variant allele (G) for the INSIG2 gene had higher triglycerides levels, systolic and diastolic blood pressure (p < 0.05). Conclusions: the polymorphism rs7566605 of the INSIG2 gene is associated with higher triglycerides levels and blood pressure values, which are also considered as risk factors for the development of MS.

INTRODUCCIÓN: Objetivo: este estudio tuvo como objetivo evaluar la asociación entre polimorfismos de los genes INSIG, PCSK9 y FTO con las características antropométricas, bioquímicas y la presencia de síndrome metabólico (SM) en pacientes con obesidad grave. Material y métodos: el presente estudio incluyó 150 pacientes con obesidad de grado II o III, que fueron sometidos a evaluación nutricional, medición de la presión arterial y extracción de sangre periférica. Los polimorfismos INSIG2 (rs75666605), PCSK9 (rs505151) y FTO (rs9939609) fueron genotipados utilizando sondas TaqMan Pre-Designed SNP Genotyping Assays en la reacción en cadena de la polimerasa en tiempo real (PCR). Los datos experimentales se procesan en SPSS Statistics 22.0 (p < 0,05). Resultados: en este estudio, el 72,2% de los sujetos obesos tenían síndrome metabólico (EM). Hubo una mayor prevalencia de genotipos AA (86,9%), CG (51,1%) y AT (46,2%) para los polimorfismos PCSK9, INSIG2 y FTO, respectivamente. No hubo asociación de estos polimorfismos con la prevalencia de SM (p > 0,05). Por otro lado, los individuos con al menos una variante de alelo (G) para el gen INSIG2 tenían niveles más altos de triglicéridos, presión arterial sistólica y diastólica (p < 0,05). Conclusiones: el polimorfismo rs7566605 del gen INSIG2 se asocia con niveles más altos de triglicéridos y valores de presión arterial, que también se consideran factores de riesgo para el desarrollo del síndrome metabólico.

Green tea supplementation promotes leukocyte telomere length elongation in obese women.

INTRODUCTION: inflammation and oxidative stress are factors that may play a substantial role in telomere attrition. In line of this, obesity is associated with telomere shortening. Green tea had anti-inflammatory and antioxidant effects and may alter telomere length (TL). OBJECTIVES: we evaluated the effect of decaffeinated green tea supplementation in obese women on TL. METHODS: we conducted a cross-sectional interventional study with ten obese (body mass index [BMI] > 40 kg/m²) and eight normal weight (BMI > 18.5 and < 24.9 kg/m²) women (age between 27 and 48 years). The supplementation was carried out with capsules (each contained 450.7 mg of epigallocatechin-3-gallate) during eight weeks. Anthropometric and dietary intake assessment, and blood collection (for biochemical and TL analysis by quantitative PCR) were performed before and after supplementation. Normal weight patients were evaluated at a single moment. RESULTS: we observed a significant increase on TL after supplementation (1.57 ± 1.1 to 3.2 ± 2.1 T/Sratio; p < 0.05). Moreover, we found shorter TL in obese patients (day 0) when compared to normal weight individuals (3.2 ± 1.9 T/Sratio; p < 0.05) and an inverse association between TL and BMI, even after age adjustment (beta = -0.527; r² = 0.286; IC = -0.129, -0.009). CONCLUSION: obesity is related to shorter telomeres. Green tea supplementation during eight weeks promotes telomere elongation in obese women.

Green tea supplementation promotes leukocyte telomere length elongation in obese women / La suplementación con té verde promueve la elongación de los telómeros de leucocitos en mujeres obesas

Introduction: inflammation and oxidative stress are factors that may play a substantial role in telomere attrition. In line of this, obesity is associated with telomere shortening. Green tea had anti-inflammatory and antioxidant effects and may alter telomere length (TL).Objectives: we evaluated the effect of decaffeinated green tea supplementation in obese women on TL. Methods: we conducted a cross-sectional interventional study with ten obese (body mass index [BMI] > 40 kg/m²) and eight normal weight (BMI > 18.5 and < 24.9 kg/m²) women (age between 27 and 48 years). The supplementation was carried out with capsules (each contained 450.7 mg of epigallocatechin-3-gallate) during eight weeks. Anthropometric and dietary intake assessment, and blood collection (for biochemical and TL analysis by quantitative PCR) were performed before and after supplementation. Normal weight patients were evaluated at a single moment. Results: we observed a significant increase on TL after supplementation (1.57 ± 1.1 to 3.2 ± 2.1 T/Sratio; p < 0.05). Moreover, we found shorter TL in obese patients (day 0) when compared to normal weight individuals (3.2 ± 1.9 T/Sratio; p < 0.05) and an inverse association between TL and BMI, even after age adjustment (beta = -0.527; r² = 0.286; IC = -0.129, -0.009).Conclusion: obesity is related to shorter telomeres. Green tea supplementation during eight weeks promotes telomere elongation in obese women

Introducción: la inflamación y el estrés oxidativo son factores que pueden jugar un papel importante en el desgaste de los telómeros. En línea con esto, la obesidad está asociada con el acortamiento de los telómeros. El té verde tiene efectos antiinflamatorios y antioxidantes y puede alterar la longitud de los telómeros (LT). Objetivos: evaluamos el efecto de la suplementación de té verde descafeinado en la LT en mujeres obesas. Métodos: realizamos un estudio intervencionista de corte transversal con 10 mujeres obesas (IMC > 40 kg/m²) y 8 con peso normal (IMC > 18,5 y < 24,9 kg/m²) (edad entre 27 y 48 años). La suplementación se llevó a cabo con cápsulas (cada una contenía 450,7 mg de epigalocatequina- 3-galato) durante 8 semanas. La evaluación de la ingesta antropométrica y dietética y la recolección de sangre (para análisis bioquímicos y LT por PCR cuantitativa) se realizaron antes y después de la administración de suplementos. Los pacientes de peso normal fueron evaluados en un solo momento. Resultados: observamos un aumento significativo en LT después de la suplementación (1,57 ± 1,1 a 3,2 ± 2,1 T/S ratio; p < 0,05). Además, encontramos LT más corta en pacientes obesos (día 0) en comparación con individuos de peso normal (3,2 ± 1,9 T/S ratio; p < 0,05) y una asociación inversa entre LT e IMC, incluso después del ajuste de edad (beta = -0,527; r² = 0,286; IC = -0,129, -0,009). Conclusión: la obesidad está relacionada con los telómeros más cortos. La administración de suplementos de té verde durante 8 semanas promueve la elongación de los telómeros en mujeres obesas

Effects of Short-Term Calcium Supplementation in Children and Adolescents with Phenylketonuria.

Reduction of bone mineral density and the risk of osteopenia have been reported to occur in phenylketonuria (PKU) patients. This study aimed to evaluate the short-term effects of calcium supplementation in phenylketonuric children and adolescents. The study included 18 patients with PKU aged 5-18 yr (61% male) under clinical and nutritional treatment. Evaluation of food intake, anthropometry, and biochemical and phalangeal quantitative ultrasound were performed before (phase 1) and after (phase 2) calcium supplementation (1000 mg/d) for 34 d. Statistical analysis was performed using t test for paired samples, Wilcoxon's test, and McNemar's test (p <0.05). There was an inadequate intake of phosphorus and vitamin D, the same occurring with serum concentrations of these nutrients. About 50% of the patients had an accumulation of adipose tissue measures, with a negative correlation between Z-score, body mass index, and phalangeal quantitative ultrasound (amplitude-dependent speed of sound [AD-SoS]). There was a significant difference in urinary phosphorus excretion with higher values before supplementation. Comparison of the two phases revealed significantly higher AD-SoS values after the supplementation (p = 0.017). The reduction in phosphorus excretion associated with increased AD-SoS between the two phases suggested increased bone formation, and showed no negative effects in relation to short-term calcium supplementation in children and in adolescents with PKU.

Correction to: Omeprazole Absorption and Fasting Gastrinemia After Roux-en-Y Gastric Bypass.

Larissa Alves dos Reis Dias wasmistakenly included in the 13 acknowledgment section of this article, and was mistakenly.

Bariatric Surgery and Precision Nutrition.

This review provides a literature overview of new findings relating nutritional genomics and bariatric surgery. It also describes the importance of nutritional genomics concepts in personalized bariatric management. It includes a discussion of the potential role bariatric surgery plays in altering the three pillars of nutritional genomics: nutrigenetics, nutrigenomics, and epigenetics. We present studies that show the effect of each patient's genetic and epigenetic variables on the response to surgical weight loss treatment. We include investigations that demonstrate the association of single nucleotide polymorphisms with obesity phenotypes and their influence on weight loss after bariatric surgery. We also present reports on how significant weight loss induced by bariatric surgery impacts telomere length, and we discuss studies on the existence of an epigenetic signature associated with surgery outcomes and specific gene methylation profile, which may help to predict weight loss after a surgical procedure. Finally, we show articles which evidence that bariatric surgery may affect expression of numerous genes involved in different metabolic pathways and consequently induce functional and taxonomic changes in gut microbial communities. The role nutritional genomics plays in responses to weight loss after bariatric surgery is evident. Better understanding of the molecular pathways involved in this process is necessary for successful weight management and maintenance.

Omeprazole Absorption and Fasting Gastrinemia After Roux-en-Y Gastric Bypass.

PURPOSE: Roux-en-Y gastric bypass (RYGB) is one of the bariatric surgeries most frequently performed worldwide. Since this operation may predispose to the formation of peptic ulcer of the gastrojejunal anastomosis, the use of proton pump inhibitors (PPI) is recommended during the first postoperative year. However, so far, there is no detailed knowledge about the absorption of this medication during the immediate postoperative period and consequently about its effectiveness in blocking acid secretion. The objective was to assess the possible endoscopic peptic changes, the absorption of omeprazole (OME), and the status of fasting gastrinemia before and after RYGB operation. MATERIALS AND METHODS: OME absorption, the production of its metabolites omeprazole sulfone (OMES) and 5-hydroxyomeprazole (HOME), and basal (fasting) gastrinemia were determined in patients submitted to RYGB before and 2 months after the operation. Upper digestive endoscopy (UDE) was also performed before and 6 months after the operation. RESULTS: Twenty patients were studied. Preoperatively, all these patients had some peptic changes and 55% tested positive for Helicobacter pylori. Six months after surgery, ten patients still showed endoscopic changes and one patient tested positive for H. pylori. During the postoperative period, there was a reduction of OME absorption and of the production of its metabolites 90 min after administration of the drug, and reduction of serum gastrin levels. CONCLUSION: The standard OME dose (40 mg) administered after bariatric surgery is insufficient to achieve serum levels that can effectively block the production of hydrochloric acid, permitting the formation of peptic injuries in many patients.