scholarly journals Roux-en-Y gastric bypass alters small intestine glutamine transport in the obese Zucker rat

2009 ◽  
Vol 297 (3) ◽  
pp. G594-G601 ◽  
Author(s):  
Brynn S. Wolff ◽  
Katia Meirelles ◽  
Qinghe Meng ◽  
Ming Pan ◽  
Robert N. Cooney
Keyword(s):  
Gastric Bypass ◽  
Small Intestine ◽  
Relative Abundance ◽  
Glutamine Metabolism ◽  
Metabolic Effects ◽  
Zucker Rats ◽  
Common Channel ◽  
Glutamine Transport ◽  
The Common ◽  
Intestinal Gluconeogenesis

The metabolic effects of Roux-en-Y gastric bypass (RYGB) are caused by postsurgical changes in gastrointestinal anatomy affecting gut function. Glutamine is a critical gut nutrient implicated in regulating glucose metabolism as a substrate for intestinal gluconeogenesis. The present study examines the effects of obesity and RYGB on intestinal glutamine transport and metabolism. First, lean and obese Zucker rats (ZRs) were compared. Then the effects of RYGB and sham surgery with pair feeding (PF) in obese ZRs were studied. Segments of small intestine (biliopancreatic limb, Roux limb, and common channel) mucosa were harvested and brush border membrane vesicles (BBMVs) were isolated on postoperative day 28. Glutamine transporter activity and abundance, B0AT1 protein, and mRNA levels were measured. Levels of glutaminase, cytosolic phosphoenolpyruvate carboxykinase (PEPCK-C), and glucose-6-phosphatase (G6Pase) were measured to assess glutamine metabolism and intestinal gluconeogenesis. Obesity increased glutamine transport and B0AT1 expression throughout the intestine. RYGB increased glutamine transport activity in the biliopancreatic (3.8-fold) and Roux limbs (1.4-fold) but had no effect on the common channel. The relative abundance of B0AT1 mRNA and protein were increased in the biliopancreatic (6-fold) and Roux limbs (10-fold) after RYGB ( P < 0.05 vs. PF), but not the common channel. Glutaminase levels were increased, whereas the relative abundance of PEPCK-C and G6Pase were decreased in all segments of intestine after RYGB. RYGB selectively increased glutamine absorption in biliopancreatic and Roux limbs by a mechanism involving increased B0AT1 expression. Post-RYGB glutaminase levels were increased, but the reductions in PEPCK-C and G6Pase suggest that RYGB downregulates intestinal gluconeogenesis.

Characterization of one anastomosis gastric bypass and impact of biliary and common limbs on bile acid and postprandial glucose metabolism in a minipig model

2021 ◽  
Author(s):  
Camille Marciniak ◽  
Oscar Chávez-Talavera ◽  
Robert Caiazzo ◽  
Thomas Hubert ◽  
Lorea Zubiaga ◽  
...  
Keyword(s):  
Weight Loss ◽  
Gastric Bypass ◽  
Body Weight ◽  
Glucose Metabolism ◽  
Glucose Homeostasis ◽  
Body Weight Loss ◽  
Metabolic Effects ◽  
One Anastomosis Gastric Bypass ◽  
Alimentary Limb ◽  
The Common

Background/Objectives: The alimentary limb has been proposed to be a key driver of the weight-loss-independent metabolic improvements that occur upon bariatric surgery. However, the One Anastomosis Gastric Bypass (OAGB) procedure, consisting of one long biliary limb and a short common limb, induces stronger beneficial metabolic effects compared to Roux-en-Y Gastric Bypass (RYGB) in humans, despite the lack of an alimentary limb. The aim of this study was to assess the role of the biliary and common limbs in the weight-loss and metabolic effects that occur upon OAGB. Subjects/Methods: OAGB and sham surgery, with or without modifications of the length of either the biliary limb or the common limb, were performed in Gottingen-like minipigs. Weight loss, metabolic changes, and the effects on plasma and intestinal bile acids (BAs) were assessed 15 days after surgery. Results: OAGB significantly decreased body weight, improved glucose homeostasis, increased postprandial GLP-1 and fasting plasma BAs, and qualitatively changed the intestinal BA species composition. Resection of the biliary limb prevented the body weight loss effects of OAGB and attenuated the postprandial GLP-1 increase. Improvements in glucose homeostasis along with changes in plasma and intestinal BAs occurred after OAGB regardless of the biliary limb length. Resection of only the common limb reproduced the glucose homeostasis effects and the changes in intestinal BAs. Conclusions: Our results suggest that the changes in glucose metabolism and BAs after OAGB are mainly mediated by the length of the common limb, whereas the length of the biliary limb contributes to body weight loss.

Shortening of the Common Channel as a Rescue Surgery After Gastric Bypass Failure

2020 ◽  
Vol 30 (12) ◽  
pp. 4760-4767
Author(s):  
Joaquin Ortega-Serrano ◽  
Gabriel Kraus-Fischer ◽  
Raquel Alfonso-Ballester ◽  
Norberto Cassinello-Fernández
Keyword(s):  
Gastric Bypass ◽  
Common Channel ◽  
The Common ◽  
Gastric Bypass Failure

scholarly journals Toll-like receptor-4 (TLR4) and MyD88 are required for Gastric Bypass-induced metabolic effects

2021 ◽  
Author(s):  
Marwa Abu El-Haija ◽  
Yuanchao Ye ◽  
Yi Chu ◽  
Hussein Herz ◽  
Benjamin Linden ◽  
...  
Keyword(s):  
Gastric Bypass ◽  
Metabolic Effects ◽  
Toll Like Receptor ◽  
Toll Like Receptor 4

scholarly journals The regulation of phosphate-activated glutaminase activity and glutamine metabolism in the streptozotocin-diabetic rat

1984 ◽  
Vol 224 (1) ◽  
pp. 207-214 ◽  
Author(s):  
M Watford ◽  
E M Smith ◽  
E J Erbelding
Keyword(s):  
Drinking Water ◽  
Small Intestine ◽  
Glutamine Metabolism ◽  
Diabetic Rat ◽  
Complete Suppression ◽  
Chemically Induced ◽  
Phosphate Activated Glutaminase ◽  
Kidney Liver ◽  
Nh4cl Solution ◽  
Glutaminase Activity

The activity of phosphate-activated glutaminase was increased in the kidney, liver and small intestine of rats made diabetic for 6 days with injection of streptozotocin (75 mg/kg body wt.). Insulin prevented this increase in all three tissues. Treatment with NaHCO3, to correct the acidosis that accompanies diabetes, prevented the increase in renal glutaminase activity, but not that in liver or small intestine. Chemically induced acidosis (NH4Cl solution as drinking water) or alkalosis (NaHCO3 solution as drinking water) increased and decreased, respectively, glutaminase activity in the kidney, but were without significant effect on the activity in liver and small intestine. The increase in glutaminase activity in the small intestine during diabetes was due to an overall increase in the size of this organ, and was only detectable when activity was expressed in terms of whole organ, not mucosal scrapings or isolated enterocytes. Prolonged diabetes (40 days) resulted in an even greater increase in the size and glutaminase activity of the small intestine. Despite this marked increase in capacity for glutamine catabolism, arteriovenous-difference measurements showed a complete suppression of plasma glutamine utilization by the small intestine during diabetes, confirming the report by Brosnan, Man, Hall, Colbourne & Brosnan [(1983) Am. J. Physiol. 235, E261-E265].

scholarly journals Ecology of sandflies (Diptera: Psychodidae) in a restricted focus of cutaneous leishmaniasis en Northern Venezuela: I. Description of the study area, catching methods and species composition

1987 ◽  
Vol 82 (1) ◽  
pp. 119-124 ◽  
Author(s):  
M. Dora Feliciangeli
Keyword(s):  
Species Composition ◽  
Cutaneous Leishmaniasis ◽  
Relative Abundance ◽  
Rare Species ◽  
Common Species ◽  
Term Study ◽  
Phlebotomine Sandfly ◽  
Phlebotomine Sandflies ◽  
The Common ◽  
Catching Methods

A study on the ecology of phlebotomine sandfly fauna in a restricted focus of cutaneous leishmaniasis in northern Venezuela was undertaken in order to investigate the species responsible for the transmission. The study area and catching methods for phlebotomine sandflies are described. A total of 9,061 females and 1,662 males were collected during a year-term study. 12 species of Lutzomya and 1 species of Brumptomya sp. were identified. Absolute and relative abundance and ocurrence for each species were determined. The rel ative occurrence allowed to distinguish the common species, viz. L. panamensis, L. ovallesi, L. gomezi, L. tinidadensis, L. atroclavata, L. cayennensis, L. shannoni and L. olmeca bicolor from the rare species vis., L. punctigeniculata, L. rangeliana, L. evansi and L. dubitans. General comments on the species composition of the sandfly fauna in this locality are made.

scholarly journals Long-Term Quality of Life Outcomes After Laparoscopic Sleeve Gastrectomy and Roux-en-Y Gastric Bypass—a Comparative Study

2020 ◽  
Author(s):  
Cristina Fiorani ◽  
Sophie R. Coles ◽  
Myutan Kulendran ◽  
Emma Rose McGlone ◽  
Marcus Reddy ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Bariatric Surgery ◽  
Gastric Bypass ◽  
Sleeve Gastrectomy ◽  
Metabolic Effects ◽  
Life Outcomes ◽  
Post Bariatric Surgery ◽  
Comorbidity Resolution

Abstract Roux-en-Y gastric bypass (RYGB) and sleeve gastrectomy (SG) have been shown to improve metabolic comorbidities as well as quality of life (QoL) in the obese population. The vast majority of previous studies have investigated the metabolic effects of bariatric surgery and there is a dearth of studies examining long-term QoL outcomes post bariatric surgery. The outcomes of 43 patients who underwent bariatric surgery were prospectively assessed, using BAROS questionnaires to quantify QoL and metabolic status pre-operatively, at 1 year and at 8 years. Total weight loss and comorbidity resolution were similar between RYGB and SG. The RYGB cohort experienced greater QoL improvement from baseline and had higher BAROS scores at 8 years. RYGB may provide more substantial and durable long-term benefits as compared to SG.

scholarly journals Treatment experience of a patient with duodenal trauma

2020 ◽  
pp. 95-96
Author(s):  
A. K. Krekoten ◽  
A. A. Krekoten ◽  
V. N. Mutyl
Keyword(s):  
Small Intestine ◽  
High Mortality ◽  
Mortality Risk ◽  
Postoperative Period ◽  
Pancreatic Ducts ◽  
High Mortality Risk ◽  
Intraoperative Diagnosis ◽  
Short Loop ◽  
The Common

A case of combined duodenal trauma in the 11-year-old patient is described. Complications of pre-operative and intraoperative diagnosis as well as complicated postoperative period are emphasized to be a cause of high mortality risk in this pathology. The disconnection of proximal and distal parts of duodenum was performed; anastomoses were placed between the common bile and pancreatic ducts and small intestine, and gastroenteroanastomosis was performed on a short loop. Follow-up traced for 10 months: recovery.

scholarly journals Effects of standard v. very long Roux limb Roux-en-Y gastric bypass on nutrient status: a 1-year follow-up report from the Dutch Common Channel Trial (DUCATI) Study

2020 ◽  
Vol 123 (12) ◽  
pp. 1434-1440 ◽  
Author(s):  
M. Leeman ◽  
R. P. M. Gadiot ◽  
J. M. A. Wijnand ◽  
E. Birnie ◽  
J. A. Apers ◽  
...  
Keyword(s):  
Vitamin D ◽  
Gastric Bypass ◽  
Folic Acid ◽  
Outcome Measure ◽  
Roux Limb ◽  
Secondary Outcome ◽  
Secondary Outcome Measure ◽  
Close Monitoring ◽  
Common Channel ◽  
Reoperation Rates

AbstractLaparoscopic Roux-en-Y gastric bypass (RYGB) is considered the ‘gold standard’ for surgical treatment of morbid obesity. It is hypothesised that reducing the length of the common limb positively affects the magnitude and preservation of weight loss but may also impose a risk of malnutrition. The aim of this study was to compare patients’ nutrient and vitamin deficiencies in standard RYGB with a very long Roux limb RYGB (VLRL-RYGB). This study was part of the multicentre randomised controlled trial (Dutch Common Channel Trial), including 444 patients undergoing an RYGB or a VLRL-RYGB. Laboratory results, use of multivitamin supplements and reoperations were collected at baseline and 1 year postoperative. Primary outcome measure was nutrient deficiency after 1 year postoperative. Secondary outcome measure was the reoperation rate due to malabsorption. In total, 227 patients underwent RYGB and 196 patients underwent VLRL-RYGB. Most common deficiencies at 1 year postoperative were ferritin (17·2–18·2 %), Fe (23·4–35·6 %), K (7·4–15·2 %), vitamin B12 (9·0–9·9 %) and vitamin D (22·7–34·5 %). Patients undergoing VLRL-RYGB had slightly but significantly lower levels of Ca, Fe and vitamin D compared with those undergoing RYGB at 1 year postoperative, but significantly higher levels of folic acid and Na. Reoperation rates due to malabsorption were not significantly different between RYGB (2/227, 0·9 %) and VLRL-RYGB (7/196, 3·6 %) (P = 0·088). We concluded that patients undergoing VLRL-RYGB had significantly lower levels of Ca, Fe and vitamin D compared with those undergoing RYGB at 1 year postoperative, but higher levels of folic acid and Na. Reoperation rates did not differ. Close monitoring on nutrient deficiencies should be performed in patients undergoing VLRL-RYGB.

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