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Reed J, Bain SC, Kanamarlapudi V. The Regulation of Metabolic Homeostasis by Incretins and the Metabolic Hormones Produced by Pancreatic Islets. Diabetes Metab Syndr Obes 2024; 17:2419-2456. [PMID: 38894706 PMCID: PMC11184168 DOI: 10.2147/dmso.s415934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 05/07/2024] [Indexed: 06/21/2024] Open
Abstract
In healthy humans, the complex biochemical interplay between organs maintains metabolic homeostasis and pathological alterations in this process result in impaired metabolic homeostasis, causing metabolic diseases such as diabetes and obesity, which are major global healthcare burdens. The great advancements made during the last century in understanding both metabolic disease phenotypes and the regulation of metabolic homeostasis in healthy individuals have yielded new therapeutic options for diseases like type 2 diabetes (T2D). However, it is unlikely that highly desirable more efficacious treatments will be developed for metabolic disorders until the complex systemic regulation of metabolic homeostasis becomes more intricately understood. Hormones produced by pancreatic islet beta-cells (insulin) and alpha-cells (glucagon) are pivotal for maintaining metabolic homeostasis; the activity of insulin and glucagon are reciprocally correlated to achieve strict control of glucose levels (normoglycaemia). Metabolic hormones produced by other pancreatic islet cells and incretins produced by the gut are also crucial for maintaining metabolic homeostasis. Recent studies highlighted the incomplete understanding of metabolic hormonal synergism and, therefore, further elucidation of this will likely lead to more efficacious treatments for diseases such as T2D. The objective of this review is to summarise the systemic actions of the incretins and the metabolic hormones produced by the pancreatic islets and their interactions with their respective receptors.
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Affiliation(s)
- Joshua Reed
- Institute of Life Science, Medical School, Swansea University, Swansea, SA2 8PP, UK
| | - Stephen C Bain
- Institute of Life Science, Medical School, Swansea University, Swansea, SA2 8PP, UK
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Volek JS, Kackley ML, Buga A. Nutritional Considerations During Major Weight Loss Therapy: Focus on Optimal Protein and a Low-Carbohydrate Dietary Pattern. Curr Nutr Rep 2024:10.1007/s13668-024-00548-6. [PMID: 38814519 DOI: 10.1007/s13668-024-00548-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/01/2024] [Indexed: 05/31/2024]
Abstract
PURPOSE OF REVIEW Considering the high prevalence of obesity and related metabolic impairments in the population, the unique role nutrition has in weight loss, reversing metabolic disorders, and maintaining health cannot be overstated. Normal weight and well-being are compatible with varying dietary patterns, but for the last half century there has been a strong emphasis on low-fat, low-saturated fat, high-carbohydrate based approaches. Whereas low-fat dietary patterns can be effective for a subset of individuals, we now have a population where the vast majority of adults have excess adiposity and some degree of metabolic impairment. We are also entering a new era with greater access to bariatric surgery and approval of anti-obesity medications (glucagon-like peptide-1 analogues) that produce substantial weight loss for many people, but there are concerns about disproportionate loss of lean mass and nutritional deficiencies. RECENT FINDINGS No matter the approach used to achieve major weight loss, careful attention to nutritional considerations is necessary. Here, we examine the recent findings regarding the importance of adequate protein to maintain lean mass, the rationale and evidence supporting low-carbohydrate and ketogenic dietary patterns, and the potential benefits of including exercise training in the context of major weight loss. While losing and sustaining weight loss has proven challenging, we are optimistic that application of emerging nutrition science, particularly personalized well-formulated low-carbohydrate dietary patterns that contain adequate protein (1.2 to 2.0 g per kilogram reference weight) and achieve the beneficial metabolic state of euketonemia (circulating ketones 0.5 to 5 mM), is a promising path for many individuals with excess adiposity.
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Affiliation(s)
- Jeff S Volek
- Department of Human Sciences, The Ohio State University, 305 Annie & John Glenn Ave, Columbus, OH, 43210, USA.
| | - Madison L Kackley
- Department of Human Sciences, The Ohio State University, 305 Annie & John Glenn Ave, Columbus, OH, 43210, USA
| | - Alex Buga
- Department of Human Sciences, The Ohio State University, 305 Annie & John Glenn Ave, Columbus, OH, 43210, USA
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Bonelli L, Menon V, Arnold AC, Mollan SP. Managing idiopathic intracranial hypertension in the eye clinic. Eye (Lond) 2024:10.1038/s41433-024-03140-y. [PMID: 38789788 DOI: 10.1038/s41433-024-03140-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 04/30/2024] [Accepted: 05/07/2024] [Indexed: 05/26/2024] Open
Abstract
Idiopathic intracranial hypertension (IIH) is a neuro-ophthalmological condition characterised by a raised intracranial pressure and papilloedema that causes disabling headaches. The main risk factors of female sex and living with obesity have been known for some time, however the knowledge of the underlying pathophysiology is evolving. Papilloedema can impact the visual function, and the majority of people are offered acetazolamide. Those with sight threatening disease need urgent management, though there is little high quality evidence to recommend any particular surgical intervention. Headache treatment is an unmet clinical need and simple medication overuse advice has the potential to reduce the chronification of migraine-like headaches. IIH is emerging as a systemic metabolic disease distinct from people living with obesity alone. While weight loss is the main stay of disease modifying therapy this is challenging to access and many healthcare professionals that manage the condition have no formal training or accessible pathways for weight management. The aim of this "how to do it" article is to present the latest advances in knowledge of IIH that we pragmatically included in routine clinical care for people living with the condition.
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Affiliation(s)
- Laura Bonelli
- Department of Ophthalmology, University of California, Los Angeles, Stein Eye Institute, Los Angeles, CA, USA
| | - Vaishnavi Menon
- Birmingham Neuro-Ophthalmology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, B15 2GW, UK
| | - Anthony C Arnold
- Department of Ophthalmology, University of California, Los Angeles, Stein Eye Institute, Los Angeles, CA, USA
| | - Susan P Mollan
- Translational Brain Science, Institute of Metabolism and Systems Research, University of Birmingham, Edgbaston, B15 2TT, UK.
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Ali H, Inayat F, Moond V, Chaudhry A, Afzal A, Anjum Z, Tahir H, Anwar MS, Dahiya DS, Afzal MS, Nawaz G, Sohail AH, Aziz M. Predicting short-term thromboembolic risk following Roux-en-Y gastric bypass using supervised machine learning. World J Gastrointest Surg 2024; 16:1097-1108. [PMID: 38690043 PMCID: PMC11056662 DOI: 10.4240/wjgs.v16.i4.1097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 02/07/2024] [Accepted: 03/05/2024] [Indexed: 04/22/2024] Open
Abstract
BACKGROUND Roux-en-Y gastric bypass (RYGB) is a widely recognized bariatric procedure that is particularly beneficial for patients with class III obesity. It aids in significant weight loss and improves obesity-related medical conditions. Despite its effectiveness, postoperative care still has challenges. Clinical evidence shows that venous thromboembolism (VTE) is a leading cause of 30-d morbidity and mortality after RYGB. Therefore, a clear unmet need exists for a tailored risk assessment tool for VTE in RYGB candidates. AIM To develop and internally validate a scoring system determining the individualized risk of 30-d VTE in patients undergoing RYGB. METHODS Using the 2016-2021 Metabolic and Bariatric Surgery Accreditation Quality Improvement Program, data from 6526 patients (body mass index ≥ 40 kg/m2) who underwent RYGB were analyzed. A backward elimination multivariate analysis identified predictors of VTE characterized by pulmonary embolism and/or deep venous thrombosis within 30 d of RYGB. The resultant risk scores were derived from the coefficients of statistically significant variables. The performance of the model was evaluated using receiver operating curves through 5-fold cross-validation. RESULTS Of the 26 initial variables, six predictors were identified. These included a history of chronic obstructive pulmonary disease with a regression coefficient (Coef) of 2.54 (P < 0.001), length of stay (Coef 0.08, P < 0.001), prior deep venous thrombosis (Coef 1.61, P < 0.001), hemoglobin A1c > 7% (Coef 1.19, P < 0.001), venous stasis history (Coef 1.43, P < 0.001), and preoperative anticoagulation use (Coef 1.24, P < 0.001). These variables were weighted according to their regression coefficients in an algorithm that was generated for the model predicting 30-d VTE risk post-RYGB. The risk model's area under the curve (AUC) was 0.79 [95% confidence interval (CI): 0.63-0.81], showing good discriminatory power, achieving a sensitivity of 0.60 and a specificity of 0.91. Without training, the same model performed satisfactorily in patients with laparoscopic sleeve gastrectomy with an AUC of 0.63 (95%CI: 0.62-0.64) and endoscopic sleeve gastroplasty with an AUC of 0.76 (95%CI: 0.75-0.78). CONCLUSION This simple risk model uses only six variables to assist clinicians in the preoperative risk stratification of RYGB patients, offering insights into factors that heighten the risk of VTE events.
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Affiliation(s)
- Hassam Ali
- Department of Gastroenterology, East Carolina University Brody School of Medicine, Greenville, NC 27834, United States
| | - Faisal Inayat
- Department of Internal Medicine, Allama Iqbal Medical College, Lahore, Punjab 54550, Pakistan
| | - Vishali Moond
- Department of Internal Medicine, Saint Peter's University Hospital and Robert Wood Johnson Medical School, New Brunswick, NJ 08901, United States
| | - Ahtshamullah Chaudhry
- Department of Internal Medicine, St. Dominic's Hospital, Jackson, MS 39216, United States
| | - Arslan Afzal
- Department of Gastroenterology, East Carolina University Brody School of Medicine, Greenville, NC 27834, United States
| | - Zauraiz Anjum
- Department of Internal Medicine, Rochester General Hospital, Rochester, NY 14621, United States
| | - Hamza Tahir
- Department of Internal Medicine, Jefferson Einstein Hospital, Philadelphia, PA 19141, United States
| | - Muhammad Sajeel Anwar
- Department of Internal Medicine, UHS Wilson Medical Center, Johnson, NY 13790, United States
| | - Dushyant Singh Dahiya
- Division of Gastroenterology, Hepatology and Motility, The University of Kansas School of Medicine, Kansas, KS 66160, United States
| | - Muhammad Sohaib Afzal
- Department of Internal Medicine, Louisiana State University Health, Shreveport, LA 71103, United States
| | - Gul Nawaz
- Department of Internal Medicine, Allama Iqbal Medical College, Lahore, Punjab 54550, Pakistan
| | - Amir H Sohail
- Department of Surgery, University of New Mexico School of Medicine, Albuquerque, NM 87106, United States
| | - Muhammad Aziz
- Department of Gastroenterology and Hepatology, The University of Toledo, Toledo, OH 43606, United States
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Mwala NN, Borkent JW, van der Meij BS, de van der Schueren MAE. Challenges in identifying malnutrition in obesity; An overview of the state of the art and directions for future research. Nutr Res Rev 2024:1-10. [PMID: 38576127 DOI: 10.1017/s095442242400012x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Abstract
(Protein-energy) malnutrition in individuals living with obesity presents complex diagnostic challenges due to the distinctive physiological characteristics of obesity. This narrative review critically examines the identification of malnutrition within the population with obesity, distinguishing malnutrition in obesity from related conditions such as sarcopenic obesity. While noting some shared features, the review highlights key differences between these conditions. The review also highlights the limitations of current malnutrition screening tools, which are not designed for individuals living with obesity. These tools primarily rely on anthropometric measurements, neglecting (among others) nutrient intake assessment, which hinders accurate malnutrition detection. Additionally, this review discusses limitations in existing diagnostic criteria, including the Global Leadership Initiative on Malnutrition (GLIM) criteria, when applied to individuals living with obesity. Challenges include the identification of appropriate cut-off values for phenotypic criteria (unintentional weight loss, low body mass index and muscle mass) and aetiological criteria such as reduced food intake and inflammation for the population with obesity. Overall, this review emphasises the need for modified screening tools and diagnostic criteria to recognise and assess malnutrition in obesity, leading to improved clinical outcomes and overall wellbeing.
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Affiliation(s)
- Natasha Nalucha Mwala
- Department of Nutrition, Dietetics and Lifestyle, School of Allied Health, HAN University of Applied Sciences, Nijmegen, the Netherlands
- Department of Human Nutrition and Health, Wageningen University and Research, Wageningen, the Netherlands
| | - Jos W Borkent
- Department of Nutrition, Dietetics and Lifestyle, School of Allied Health, HAN University of Applied Sciences, Nijmegen, the Netherlands
- Department of Human Nutrition and Health, Wageningen University and Research, Wageningen, the Netherlands
| | - Barbara S van der Meij
- Department of Nutrition, Dietetics and Lifestyle, School of Allied Health, HAN University of Applied Sciences, Nijmegen, the Netherlands
- Department of Human Nutrition and Health, Wageningen University and Research, Wageningen, the Netherlands
- Bond University Nutrition and Dietetics Research Group, Bond University, Gold Coast, Australia
| | - Marian A E de van der Schueren
- Department of Nutrition, Dietetics and Lifestyle, School of Allied Health, HAN University of Applied Sciences, Nijmegen, the Netherlands
- Department of Human Nutrition and Health, Wageningen University and Research, Wageningen, the Netherlands
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Zambrano AK, Paz-Cruz E, Ruiz-Pozo VA, Cadena-Ullauri S, Tamayo-Trujillo R, Guevara-Ramírez P, Zambrano-Villacres R, Simancas-Racines D. Microbiota dynamics preceding bariatric surgery as obesity treatment: a comprehensive review. Front Nutr 2024; 11:1393182. [PMID: 38633602 PMCID: PMC11021787 DOI: 10.3389/fnut.2024.1393182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Accepted: 03/18/2024] [Indexed: 04/19/2024] Open
Abstract
The review present data on the intricate relationship between bariatric surgery, gut microbiota, and metabolic health in obesity treatment. Bariatric surgery, is recognized as an effective intervention for managing morbid obesity, including various techniques with distinct mechanisms of action, efficacy, and safety profiles including Roux-en-Y Gastric Bypass (RYGB), Sleeve Gastrectomy (SG), Laparoscopic Adjustable Gastric Banding (LAGB), and Biliopancreatic Diversion (BPD). RYGB and SG are the most prevalent procedures globally, inducing gut microbiota changes that influence microbial diversity and abundance. Post-surgery, alterations in bacterial communities occur, such as the increased of Escherichia coli inversely correlated with fat mass and leptin levels. During digestion, microbiota produce physiologically active compounds like bile acids (Bas) and short-chain fatty acids (SCFAs). SCFAs, derived by microbial fermentation, influence appetite, energy metabolism, and obesity-related pathways. Bas, altered by surgery, modulate glucose metabolism and insulin sensitivity. Furthermore, SG and RYGB enhance incretin secretion, particularly glucagon-like peptide 1 (GLP-1). Therefore, understanding microbiota changes after bariatric surgery could be crucial for predicting metabolic outcomes and developing targeted interventions for obesity management.
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Affiliation(s)
- Ana Karina Zambrano
- Facultad de Ciencias de la Salud Eugenio Espejo, Centro de Investigación Genética y Genómica, Universidad UTE, Quito, Ecuador
| | - Elius Paz-Cruz
- Facultad de Ciencias de la Salud Eugenio Espejo, Centro de Investigación Genética y Genómica, Universidad UTE, Quito, Ecuador
| | - Viviana A. Ruiz-Pozo
- Facultad de Ciencias de la Salud Eugenio Espejo, Centro de Investigación Genética y Genómica, Universidad UTE, Quito, Ecuador
| | - Santiago Cadena-Ullauri
- Facultad de Ciencias de la Salud Eugenio Espejo, Centro de Investigación Genética y Genómica, Universidad UTE, Quito, Ecuador
| | - Rafael Tamayo-Trujillo
- Facultad de Ciencias de la Salud Eugenio Espejo, Centro de Investigación Genética y Genómica, Universidad UTE, Quito, Ecuador
| | - Patricia Guevara-Ramírez
- Facultad de Ciencias de la Salud Eugenio Espejo, Centro de Investigación Genética y Genómica, Universidad UTE, Quito, Ecuador
| | | | - Daniel Simancas-Racines
- Centro de Investigación de Salud Pública y Epidemiología Clínica (CISPEC), Universidad UTE, Quito, Ecuador
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Köseoğlu HT, Kenarli K, Akbay A, Erdoğan Ç, Macif A, Göktaṣ MD, Hamamci M, Kalkan Ç, Sarialtin F, Yüksel M. Intragastric injection of botulinum toxin in the treatment of obesity: a single-center study. Ther Adv Gastrointest Endosc 2024; 17:26317745241233083. [PMID: 38476126 PMCID: PMC10929057 DOI: 10.1177/26317745241233083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 01/31/2024] [Indexed: 03/14/2024] Open
Abstract
Background In recent years, various novel surgical and non-surgical therapeutic options have been developed for treating obesity. Due to its disputed success, intragastric botulinum toxin A (BTX-A) injection is still being debated. Objectives We aim to contribute to this controversial issue in the literature by sharing our center's findings regarding intragastric BTX-A injections in the treatment of obesity. Design Patients with a body mass index (BMI) of greater than 25 kg/m2 and at least one obesity-related complication, or a BMI of greater than 30 kg/m2 without complications, were eligible for the study if they were between the ages of 18 and 65. Methods Following the same procedure, two endoscopists administered BTX-A to all patients. All patients were evaluated for obesity by measuring their lipid profile, hormone profile, and insulin resistance level before treatment. Results In our study on 82 patients, we saw a significant mean weight loss (-9.2 kg, p < 0.001) in the second month, and there was no additional mean weight loss in the sixth month of follow-up. In addition, this result seems to be independent of the patient's insulin resistance. We did not see any serious side effects in any of the patients. Conclusion Although the use of intragastric injection of BTX-A in the treatment of obesity is a controversial issue, we showed in our study that it causes significant weight loss. Further studies are needed on this subject, as it can be a safe method when the ideal dose and application site are combined with appropriate patient selection.
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Affiliation(s)
- Hasan Tankut Köseoğlu
- Department of Gastroenterology, Ankara Bilkent City Hospital, Üniversiteler Mah. 1604. Cd. No: 9, Çankaya, Ankara 06800, Turkey
| | - Kerem Kenarli
- Department of Gastroenterology, Ankara Bilkent City Hospital, Çankaya, Turkey
| | - Ahmet Akbay
- Department of Gastroenterology, Ankara Bilkent City Hospital, Çankaya, Turkey
| | - Çağdaṣ Erdoğan
- Department of Gastroenterology, Ankara Bilkent City Hospital, Çankaya, Turkey
| | - Alper Macif
- Department of Gastroenterology, Ankara Bilkent City Hospital, Çankaya, Turkey
| | - Meryem Didem Göktaṣ
- Department of Internal Medicine, Ankara Bilkent City Hospital, Çankaya, Turkey
| | - Mevlüt Hamamci
- Department of Gastroenterology, Ankara Bilkent City Hospital, Çankaya, Turkey
| | - Çağdaṣ Kalkan
- Department of Gastroenterology, Ankara Bilkent City Hospital, Çankaya, Turkey
| | | | - Mahmut Yüksel
- Department of Gastroenterology, Ankara Bilkent City Hospital, Çankaya, Turkey
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Alanazi RH, Hussain MA, Alanazi RH, Alanazi SR, Alanazi RMK, Fawzy MS. Prevalence and Awareness of Obesity and Bariatric Surgeries in the Northern Borders Region, Saudi Arabia. Cureus 2023; 15:e50261. [PMID: 38196425 PMCID: PMC10775188 DOI: 10.7759/cureus.50261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/09/2023] [Indexed: 01/11/2024] Open
Abstract
Introduction Obesity is a complex health issue affecting millions worldwide, characterized by excessive body fat accumulation, often leading to various health complications. Bariatric surgeries are effective interventions for severe obesity, assisting patients in attaining substantial weight reduction and enhancing their overall well-being. This study aimed to assess obesity patterns and bariatric surgery prevalence in the Northern Borders region of Saudi Arabia to increase community knowledge and awareness about obesity and bariatric surgery. Methods This cross-sectional study included 386 residents in the Northern Borders region, Saudi Arabia. The participants completed a previously validated self-administered electronic questionnaire, and the confidentiality of the collected data was ensured. Results Nearly 58.3% of the participants (31-40 years), with a predominance of females, had a body mass index (BMI) >30, and 33.7% had undergone bariatric surgery. Most participants (92.5%) were aware that obesity is associated with significant medical issues, 98.2% appreciated that there is a surgical method to reduce weight, and 58.8% indicated that the procedure was not safe. Additionally, the majority of the respondents (57.0%) were not sure about the complications of weight-loss surgeries, and only 28.0% knew that surgeries for obesity and their complications may lead to death. Significant associations were found between age, education level, and BMI concerning the knowledge of obesity/bariatric surgery (p=0.003, 0.001, 0.002), respectively. However, gender and work status did not show such associations (p> 0.05). Conclusion Our study highlighted a lack of knowledge among the community regarding the safety, potential complications, and survival outcomes associated with obesity and bariatric surgery that could be due to ignorance and reluctance to pursue bariatric surgery to overcome morbid obesity. Significantly, the study found a relationship between age, education level, BMI, and knowledge of obesity and bariatric surgery.
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Affiliation(s)
| | - Malik A Hussain
- Department of Surgery, Northern Border University, Arar, SAU
| | | | - Saja R Alanazi
- College of Medicine, Northern Border University, Arar, SAU
| | | | - Manal S Fawzy
- Department of Biochemistry, Northern Border University, Arar, SAU
- Unit of Medical Research and Graduate Studies, Northern Border University, Arar, SAU
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