Lack of association between 11 gene polymorphisms on weight loss 1 year after Roux-en-y gastric bypass surgery in woman.

BACKGROUND: Although effective, the impact of bariatric surgery on weight loss is variable, and little is known about the influence of single-nucleotide polymorphisms (SNPs). The present study investigated the association of eleven SNPs related to obesity with weight loss 1 year after Roux-Y gastric bypass (RYGB) surgery in female patients. METHODS: This prospective study included 351 women with obesity. The genotypes for eleven SNPs (GHRL-rs26802; GHSR-rs572169; LEP-rs7799039; LEPR-rs1137101; 5HT2C-rs3813929; UCP2-rs659366; UCP3-rs1800849; SH2B1-rs7498665; TAS1R2-rs35874116; TAS1R2-rs9701796; FTO-rs9939609) were determined using a real-time polymerase chain reaction and TaqMan assays. Anthropometric measurements were performed before and 1 year after RYGB surgery. To evaluate the factors that influenced the proportion of weight loss 1 year after surgery, beta regression analysis was used. The models were estimated using the GLIMMIX procedure in SAS statistical software. p < 0.05 was considered statistically significant. RESULTS: The mean ± SD percentage of total body weight loss in 1 year was 64.4 ± 5.8% and the median was 65.0%. When assessing the proportion of weight loss in 1 year after surgery, using univariate analysis (beta regression), no SNPs influenced weight loss. Furthermore, in the multiple analysis, with stepwise process of variable selection, no variable was significant to compose the multiple model. CONCLUSIONS: The 11 SNPs investigated did not influence weight loss 1 year after RYGB surgery in female patients. This result indicates that individual behaviours and other factors might better contribute to the magnitude of loss weight loss in a short period after bariatric surgery.

Genetic polymorphisms are not associated with energy intake 1 year after Roux-en-Y gastric bypass in women.

BACKGROUND: The present study aimed to investigate the influence of food intake on body weight loss (WL) and the association of gene polymorphisms, 1 year after Roux-en-Y gastric bypass (RYGB) surgery. METHODS: In total, 95 obese women (age ranged 20-50 years) in a Brazilian cohort underwent RYGB surgery and completed the study. Anthropometric measurements and food intake were assessed before and 1 year after surgery. Twelve gene polymorphisms (GHRL rs26802; GHSR rs572169; LEP rs7799039; LEPR rs1137101; 5-HT2C rs3813929; UCP2 rs659366; UCP2 rs660339; UCP3 rs1800849; SH2B1 rs7498665; TAS1R2 rs35874116; TAS1R2 rs9701796; and FTO rs9939609) were determined using a real-time polymerase chain reaction and a TaqMan assay. The subjects were divided into quartiles regarding percentage of excess weight loss (%EWL). The effect of genetic variants on energy and macronutrient intake was evaluated by simple logistic regression, followed by multiple logistic regression. RESULTS: Subjects in the first and second quartiles showed a higher initial body mass index. Energy and macronutrient intake before and 1 year after RYGB surgery did not differ between the %EWL quartiles. None of gene polymorphisms investigated showed an association with the estimated energy intake 1 year after surgery. CONCLUSIONS: In conclusion, the estimate energy and food intake did not predict a greater body WL 1 year after RYGB surgery. In addition, the 12 gene polymorphism investigated did not affect the energy intake among female patients.

Association of 5-HT2C (rs3813929) and UCP3 (rs1800849) gene polymorphisms with type 2 diabetes in obese women candidates for bariatric surgery.

OBJECTIVE: Obesity can cause systemic arterial hypertension (SAH) and type 2 diabetes mellitus (DM2) factor that is also influenced by genetic variability. The present study aims to investigate the association between gene polymorphisms related with obesity on the prevalence of SAH and DM2 in the preoperative period and 1 year after Roux-en-Y gastric bypass surgery. SUBJECTS AND METHODS: In total, 351 obese women in a Brazilian cohort completed the study. The clinical diagnosis of SAH and DM2 was monitored from medical records. Twelve gene polymorphisms (rs26802; rs572169; rs7799039; rs1137101; rs3813929; rs659366; rs660339; rs1800849; rs7498665; rs35874116; rs9701796; and rs9939609) were determined using real-time polymerase chain reaction and TaqMan assay. RESULTS: In the preoperative period, prevalence of SAH and DM2 was 57% and 22%, respectively. One year postoperatively, 86.8% subjects had remission of DM2 and 99.5% had control of SAH. Subjects with T allele from the serotonin receptor gene (5-HT2C, rs3813929) had five times greater chance of DM2, and the CC genotype from uncoupling protein 3 gene (UCP3, rs1800849) had three times greater chance in the preoperative period. CONCLUSION: These findings indicate that polymorphisms rs3813929 and rs1800849 from 5-HT2C and UCP3 genes were related to DM2 prevalence among the Brazilian obese women candidates for bariatric surgery.

Association of 5-HT2C (rs3813929) and UCP3 (rs1800849) gene polymorphisms with type 2 diabetes in obese women candidates for bariatric surgery

ABSTRACT Objective Obesity can cause systemic arterial hypertension (SAH) and type 2 diabetes mellitus (DM2) factor that is also influenced by genetic variability. The present study aims to investigate the association between gene polymorphisms related with obesity on the prevalence of SAH and DM2 in the preoperative period and 1 year after Roux-en-Y gastric bypass surgery. Subjects and methods In total, 351 obese women in a Brazilian cohort completed the study. The clinical diagnosis of SAH and DM2 was monitored from medical records. Twelve gene polymorphisms (rs26802; rs572169; rs7799039; rs1137101; rs3813929; rs659366; rs660339; rs1800849; rs7498665; rs35874116; rs9701796; and rs9939609) were determined using real-time polymerase chain reaction and TaqMan assay. Results In the preoperative period, prevalence of SAH and DM2 was 57% and 22%, respectively. One year postoperatively, 86.8% subjects had remission of DM2 and 99.5% had control of SAH. Subjects with T allele from the serotonin receptor gene (5-HT2C, rs3813929) had five times greater chance of DM2, and the CC genotype from uncoupling protein 3 gene (UCP3, rs1800849) had three times greater chance in the preoperative period. Conclusion These findings indicate that polymorphisms rs3813929 and rs1800849 from 5-HT2C and UCP3 genes were related to DM2 prevalence among the Brazilian obese women candidates for bariatric surgery.

Micronutrient supplementation in gastric bypass surgery: prospective study on inflammation and iron metabolism in premenopausal women / Suplementación con micronutrientes en pacientes con cirugía de bypass gástrico: estudio prospectivo sobre la inflamación y el metabolismo del hierro en mujeres premenopáusicas

Background: Low-grade chronic inflammation in morbid obesity is associated with impaired iron metabolism. Bariatric surgery is effective in weight loss; however, it can induce specific nutritional deficiencies, such as iron, especially in premenopausal women. Alternatively, after surgery, there is an improvement in systemic inflammation, raising questions concerning the dosages of micronutrient supplementation. Objectives: This study aimed to assess the effect of two micronutrient supplementation schemes before and 6 months after a Roux-en-Y gastric bypass (RYGB) surgery on inflammation and iron metabolism in premenopausal women. Methods: This prospective study included 45 premenopausal women (aged 20-45 years; body mass index [BMI] ≥ 35 kg/m2) divided into two supplementation schemes: group 1 (n = 34): daily supplemental dose of 1 RDA 30 days before surgery and 2 RDAs during the six months following surgery; and group 2 (n = 11): daily supplementation of 1 RDA during the 6 months postsurgery. Anthropometry, dietary intake, inflammation, and iron metabolism were monitored. Results: Evident reductions in BMI, high-sensitivity C-reactive protein, and ferritin levels for both groups occurred 6 months after surgery. Additionally, anemia was 9% in both groups after surgery. However, group 1 exhibited an increased transferrin saturation index and reduced transferrin levels. Multivariate regression analysis suggested serum iron, hepcidin, and iron intake determined ferritin values before and after RYGB surgery. Conclusion: Six months after RYGB, systemic inflammation was reduced in both supplementation schemes. However, supplementation of 1 RDA before and 2 RDAs after surgery resulted in better improvements on iron metabolism (AU)

Introducción: la inflamación crónica de bajo grado en la obesidad mórbida se asocia con una alteración del metabolismo del hierro. La cirugía bariátrica es eficaz en la pérdida de peso, sin embargo, puede inducir deficiencias específicas nutricionales, como es el caso del hierro, especialmente en las mujeres premenopáusicas. Por otra parte, después de la cirugía, hay una mejora en la inflamación sistémica, planteando el tema de las dosis de suplementos de micronutrientes. Objetivos: este estudio tuvo como objetivo evaluar el efecto de dos esquemas de suplementación de micronutrientes antes y 6 meses después de una cirugía de by-pass gástrico con Y de Roux (RYGB) sobre la inflamación y el metabolismo del hierro en las mujeres premenopáusicas. Métodos: estudio prospectivo que incluyó 45 mujeres premenopáusicas (edades 20-40 años, índice de masa corporal [IMC] ≥ 35 kg/m2) divididos en dos esquemas de suplementación: grupo 1 (n = 34): dosis suplementaria diaria de 1 vez las RDA 30 días antes de la cirugía y 2 veces las RDA durante los seis meses posteriores a la cirugía; y el grupo 2 (n = 11): la suplementación diaria de 1RDA durante los 6 meses después de la cirugía. Se monitorizaron las medidas antropométricas, la ingesta alimentaria, la inflamación y el metabolismo del hierro. Resultados: se observó una disminución en el IMC, la proteína C reactiva de alta sensibilidad y los niveles de ferritina en ambos grupos después de 6 meses tras la cirugía. Además, la anemia fue del 9% en ambos grupos tras de la cirugía. Sin embargo, el grupo 1 exhibió un incremento del índice de saturación de transferrina y una reducción en los niveles de transferrina. En el análisis multivariante se apreció que los niveles de hierro sérico, hepcidina y la ingesta de hierro determinaron los valores de ferritina antes y después de la cirugía. Conclusión: seis meses después de RYGB, la inflamación sistémica se redujo en ambos esquemas de suplementación. Sin embargo, la suplementación de 1 vez las RDA antes y 2 veces las RDA después de la cirugía consiguió mejorar el metabolismo del hierro (AU)

Subnotificação da ingestão alimentar e fatores associados / Food intake underreporting and associated factors

OBJETIVO: Avaliar a subnotificação da ingestão energética e fatores associados entre mulheres que aguardam a cirurgia bariátrica no serviço público de saúde de uma cidade do interior do estado de São Paulo-Brasil. MÉTODOS: A amostra foi composta por 100 obesas. A ingestão energética (IE) e o nível de atividade física (NAF) foram estimados por meio de três recordatórios de 24 horas. O gasto energético em repouso(GER) foi medido pela calorimetria indireta. A razão ingestão energética relatada e gasto energético de repouso (IErel: GER) foi usada para avaliar a subnotificação, sendo o resultado comparado com pontos de corte derivados da equação de Goldberg. A associação entre a subnotificação e as características das mulheres foi avaliada pelo teste Z e a comparação entre os dados não paramétricos foi feita pelo teste de Mann-Whitney. Resultados e Conclusões: Houve diferença significativa entre os grupos de subnotificadoras e não subnotificadoras para a razão IErel:GER (p<0,0001). A proporção de subnotificação da ingestão energética foi de 47%, sendo maior entre mulheres que relataram níveis maiores de atividade física (p=0,006) e menor entre as que relataram níveis menores de atividade física (p=0,001). Quanto à escolaridade a maior proporção de subnotificação foi entre mulheres com ensino fundamental (p=0,002) e menor entre aquelas com ensino médio (p=0,03). A proporção de subnotificação também foi maior entre mulheres da classe econômica C ou inferior (p=0,049). As candidatas à cirurgia bariátrica apresentaram altas taxas de subnotificação da ingestão energética, especialmente a parcela das mulheres com menor escolaridade, baixa classe econômica e/ou mais ativas

OBJECTIVE: To assess the energy intake underreporting and associated factors among women waiting for bariatric surgery at the public healthcare service of a city in the state of São Paulo-Brazil. Methods: The sample consisted of 100 obese women.Three 24-hour recalls were used to estimate energy intake (EI) and physical activity level (PAL). Resting metabolic rate (RMR) was determined by indirect calorimetry.The ratio between reported energy intake and resting metabolic rate (rEI:RMR) wasused to assess the underreporting and the results were compared with the cut-off points obtained by the Goldberg equation. The association between under reporting and the women's characteristics was assessed by the Z-test and the non-parametric data were compared by the Mann-Whitney test. Results and Conclusions: The ratiorEI:RMR differed significantly between the underreporting and non-under reporting groups (p<0.0001). Forty-seven percent of women underreported their energy intake being that, this proportion was higher among women who reported higher physical activity levels (p=0.006) and lower among women who reported lower physical activity levels (p<0.001). The proportion of underreporting was also higher among women who had only completed elementary school (p<0.002) and lower among those who completed high school (p <0.03). Women belonging to the socioeconomic class Cor below also presented a higher proportion of underreporting (p<0.049). Bariatric surgery candidates present high rates of energy intake underreporting, especially those with lower education levels, of low socioeconomic classes and/or higher physical activity levels

A influência do anel na evolução ponderal após quatro anos da derivação gástrica em y-de-roux laparoscópica / Ring influence on ponderal evolution after four years of laparoscopic Roux-en-Y gastric bypass

RACIONAL: A utilização de anel nas derivações gástricas em Y-de-Roux ainda é motivo de polêmica entre os cirurgiões bariátricos. Não há consenso quanto às suas repercussões em relação à perda ponderal e à manutenção do peso em longo prazo. OBJETIVO: Avaliar a influência do anel sobre a evolução do peso corporal no decorrer de quatro anos após operação bariátrica. MÉTODO: Foram analisadas retrospectivamente 143 mulheres submetidas à derivação gástrica em Y-de-Roux videolaparoscópica pareadas pela utilização ou não do anel de Silastic®. O tempo de seguimento foi de até 48 meses. Os critérios de inclusão foram idade superior a 18 anos, operação bariátrica primária e frequência regular à clínica no período de interesse para a pesquisa. A técnica manteve reservatório gástrico de pequena curvatura, volume estimado em 30 ml. A alça alimentar media 150 cm e a biliar 40 cm a partir do ângulo duodenojejunal. O grupo "com anel" utilizou anel tubular de Silastic® com comprimento de 6,5 cm, colocado à 2 cm da anastomose gastrojejunal. O anel era fechado por cinco nós com fio de polipropileno em seu interior. Na manhã seguinte ao procedimento cirúrgico as pacientes recebiam líquidos isotônicos; no segundo dia dieta líquida salgada sem resíduos e alta hospitalar no terceiro dia. Dieta pastosa iniciava a partir do 20o dia e sólida no 30o, juntamente com uma drágea diária de polivitamínico. RESULTADOS: O emagrecimento do grupo com anel foi maior que o sem anel em todos os períodos analisados a nível de 10% e de 5% apenas no 3o ano pós-operatório. A proporção das operadas que não atingiram perda do excesso de peso de 50% foi significativamente maior no grupo sem anel que no grupo com anel (31% entre as sem anel e 8% das com anel no 4o ano). Não houve diferença entre os grupos na recuperação tardia do peso perdido na operação. CONCLUSÕES: Os resultados foram favoráveis à utilização do anel ao se analisar exclusivamente a perda de peso.

BACKGROUND: Use of ring in Roux-en-Y gastric bypass is still a matter of controversy among bariatric surgeons. There is no consensus on its impact in relation to weight loss and weight maintenance in the long term. AIM: To evaluate the influence of the ring on the evolution of body weight over four years after bariatric surgery. METHODS: Retrospective analyzis of 143 women who underwent laparoscopic Roux-en-Y gastric bypass paired on the use or not use of Silastic® ring. Follow-up time was 48 months. Inclusion criteria were age over 18 years, primary bariatric operation and regular attendance at the clinic during the period of interest for research. The technique kept small gastric reservoir estimated in a volume of 30 ml. The food limb had in average 150 cm and the bile one 40 cm from the duodenojejunal angle. The group "ring" used Silastic® device with length of 6.5 cm, placed 2 cm from gastrojejunal anastomosis. The ring was closed for five polypropylene surgical thread sutures. In the morning after surgery the patients received isotonic fluids; on the second day salty liquid diet and were discharged on the third day. Semisolid diet started from the 20th day and solid on the 30th, with daily tablet of polivitamins. RESULTS: The weight loss was larger on the ring than without ring groups in all periods, respectively 10% and only 5% in the third postoperative year. The proportion of not having reached the 50% excess weight loss expectative was significantly higher in the group without ring than in the group with the ring (31% and 8% respectively in the fourth year). There was no difference between groups in delayed recovery of weight lost with the operation. CONCLUSIONS: The results were favorable to use the ring exclusively when it is analyzed only the weight loss.

Food intake in women two years or more after bariatric surgery meets adequate intake requirements.

Restricted food intake after bariatric surgery can be an important factor both in the long-term control of body weight and in the onset of nutritional deficiencies. The objective of this study was to assess the adequacy of food intake in women two or more years after bariatric surgery according to the excess weight lost. A group of 141 women who underwent banded Roux-en-Y gastric bypass (RYGB) was divided according to the percentage of excess weight they lost (%EWL)<50; 50┤75; = 75. The habitual energy and nutrient intakes were determined by a 24-hour recall over two days and the probability of adequate intake was based on the Dietary Reference Intake. The mean total estimated energy requirement (EER) as well as energy, macronutrient and cholesterol intakes did not differ among the groups. Only the %EWL<50 group had an intake equal to their EER, but they presented a higher number of inadequacies, such as low levels of magnesium, folic acid and vitamins C and E. Calcium and dietary fiber intakes were extremely low in all three groups. In conclusion, weight loss after surgery is associated with food habits that favor energy intake over micronutrient intake.

Ring influence on ponderal evolution after four years of laparoscopic Roux-en-Y gastric bypass.

BACKGROUND: Use of ring in Roux-en-Y gastric bypass is still a matter of controversy among bariatric surgeons. There is no consensus on its impact in relation to weight loss and weight maintenance in the long term. AIM: To evaluate the influence of the ring on the evolution of body weight over four years after bariatric surgery. METHODS: Retrospective analyzis of 143 women who underwent laparoscopic Roux-en-Y gastric bypass paired on the use or not use of Silastic® ring. Follow-up time was 48 months. Inclusion criteria were age over 18 years, primary bariatric operation and regular attendance at the clinic during the period of interest for research. The technique kept small gastric reservoir estimated in a volume of 30 ml. The food limb had in average 150 cm and the bile one 40 cm from the duodenojejunal angle. The group "ring" used Silastic® device with length of 6.5 cm, placed 2 cm from gastrojejunal anastomosis. The ring was closed for five polypropylene surgical thread sutures. In the morning after surgery the patients received isotonic fluids; on the second day salty liquid diet and were discharged on the third day. Semisolid diet started from the 20th day and solid on the 30th, with daily tablet of polivitamins. RESULTS: The weight loss was larger on the ring than without ring groups in all periods, respectively 10% and only 5% in the third postoperative year. The proportion of not having reached the 50% excess weight loss expectative was significantly higher in the group without ring than in the group with the ring (31% and 8% respectively in the fourth year). There was no difference between groups in delayed recovery of weight lost with the operation. CONCLUSIONS: The results were favorable to use the ring exclusively when it is analyzed only the weight loss.

Food aversions in women during the 2 years after Roux-en-Y gastric bypass.

The anatomical and physiological changes of the gastrointestinal tract after Roux-en-Y gastric bypass lead to changes in dietary patterns and their effects are still little known. Hence, the objective of this work was to characterize the prevalence, the associated factors and the list of food aversions with the effect of surgery on the body weight of women in the first two years after Roux-en-Y gastric bypass. A total of 141 women were studied. Their food aversions were assessed with a short food frequency questionnaire (FFQ-S) containing 26 items before and 6, 12 and 24 months after surgery. The FFQ-S was filled out during individual interviews and referenced in the medical records. The association between total aversion score and body weight variables and general characteristics of the group was analyzed. Variation of food aversions over time was assessed for 26 foods individually and grouped. Of all the studied variables, a weak but significant negative correlation (rs = -0.1944; p = 0.0208) was found between total aversion score and shorter postoperative period and a weak but significant positive correlation was found between total aversion score and percentage of weight regained (rs = -0.1759; p = 0.0369). Food aversions were more common in the first six months after surgery, especially to red meats, rice, chicken, eggs, pasta, milk and others. Food aversions in the early postoperative period are associated with weight variations in the first two years after surgery and subside significantly over time, probably because of a physiological and cognitive adaptation of the individual to the surgical procedure.

[Body weight evolution and classification of body weight in relation to the results of bariatric surgery: roux-en-Y gastric bypass]. / Evolução e classificação do peso corporal em relação aos resultados da cirurgia bariátrica: derivação gástrica em Y de Roux.

OBJECTIVE: The objective of this study was to assess the evolution and classification of body weight in relation to the results of bariatric surgery in women who underwent the procedure more than two years ago. SUBJECTS AND METHOD: A total of 141 women underwent banded Roux-en-Y gastric bypass (RYGB). The participants were divided according to the time elapsed since surgery and the percentage of excess weight lost (%EWL): < 50; 50 upper and lower left quadrants 75; and > 75. RESULTS: The women in the group with %EWL < 50 (15.6%) remained obese, while those with %EWL > 75 (36.2%) ranged from normal to pre-obese and presented lower late weight gain than the women in the other groups. CONCLUSION: Weight evolution two or more years after surgery showed the expected reductions, with some individuals responding better to surgery than others. This shows that it is necessary to monitor, investigate and intervene to obtain the desired results.

Evolução e classificação do peso corporal em relação aos resultados da cirurgia bariátrica: derivação gástrica em Y de Roux / Body weight evolution and classification of body weight in relation to the results of bariatric surgery: roux-en-Y gastric bypass

OBJETIVO: Avaliar a evolução e a classificação do peso corporal em relação aos resultados da cirurgia bariátrica em mulheres submetidas ao procedimento cirúrgico há mais de dois anos. SUJEITOS E MÉTODO: Foram avaliadas 141 mulheres submetidas à derivação gástrica em Y de Roux (DGYR) com anel de contenção. As participantes foram divididas de acordo com o tempo de pós-operatório e conforme o percentual da perda do excesso de peso ( por centoPEP): < 50; 50 ┤ 75; e, > 75. RESULTADOS: As mulheres do grupo com por centoPEP < 50 (15,6 por cento) se mantiveram obesas, enquanto aquelas que apresentaram por centoPEP > 75 (36,2 por cento) situaram-se entre a eutrofia e préobesidade e tiveram menor índice de recuperação tardia de peso em relação aos demais grupos. CONCLUSÃO: A evolução de peso após dois ou mais anos da cirurgia mostrou sua esperada redução com variados graus de resposta, apontando a necessidade de monitoramento, investigação e intervenção para obtenção dos resultados esperados.

OBJECTIVE: The objective of this study was to assess the evolution and classification of body weight in relation to the results of bariatric surgery in women who underwent the procedure more than two years ago. SUBJECTS AND METHOD: A total of 141 women underwent banded Roux-en-Y gastric bypass (RYGB). The participants were divided according to the time elapsed since surgery and the percentage of excess weight lost ( percentEWL): < 50; 50 ┤ 75; and > 75. RESULTS: The women in the group with percentEWL < 50 (15.6 percent) remained obese, while those with percentEWL > 75 (36.2 percent) ranged from normal to pre-obese and presented lower late weight gain than the women in the other groups. CONCLUSION: Weight evolution two or more years after surgery showed the expected reductions, with some individuals responding better to surgery than others. This shows that it is necessary to monitor, investigate and intervene to obtain the desired results.