1
|
Liu W, Jin W, Wilde PJ, Jin Y, Pan Y, Han J. Understanding the mechanism of high viscosity food delaying gastric emptying. Food Funct 2024; 15:5382-5396. [PMID: 38639045 DOI: 10.1039/d4fo00319e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
Controlling the structure and viscosity of food can influence the development of diet-related diseases. Food viscosity has been linked with health through its impact on human digestion and gastrointestinal transit, however, there is limited understanding of how the viscosity of food regulates gastric emptying. Here, we used model food preparations with different viscosities using guar gum, to explore the mechanism underlying the influence of viscosity on gastric motility, gastric emptying and postprandial blood glucose. Based on experiments in human volunteers and animals, we demonstrated that high viscosity meals increased gastric antrum area and gastric retention rate. Viscosity also affected gut hormone secretion, reduced the gene expression level of interstitial cells of Cajal, resulting in a delay of gastric emptying and limiting the increase in postprandial glucose. This improved mechanistic understanding of food viscosity during gastric digestion is important for designing new foods to benefit human health.
Collapse
Affiliation(s)
- Weilin Liu
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China.
| | - Weiping Jin
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China.
| | - Peter J Wilde
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China.
- Quadram Institute Bioscience, Norwich Research Park, Norwich, NR4 7UA, UK
| | - Yangyi Jin
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China.
| | - Yujie Pan
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China.
| | - Jianzhong Han
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China.
| |
Collapse
|
2
|
Xu Q, Yao Y, Liu Y, Zhang J, Mao L. The mechanism of traditional medicine in alleviating ulcerative colitis: regulating intestinal barrier function. Front Pharmacol 2023; 14:1228969. [PMID: 37876728 PMCID: PMC10590899 DOI: 10.3389/fphar.2023.1228969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 09/26/2023] [Indexed: 10/26/2023] Open
Abstract
Ulcerative colitis (UC) is an idiopathic inflammatory disease mainly affects the large bowel and the rectum. The pathogenesis of this disease has not been fully elucidated, while the disruption of the intestinal barrier function triggered by various stimulating factors related to the host genetics, immunity, gut microbiota, and environment has been considered to be major mechanisms that affect the development of UC. Given the limited effective therapies, the treatment of this disease is not ideal and its incidence and prevalence are increasing. Therefore, developing new therapies with high efficiency and efficacy is important for treating UC. Many recent studies disclosed that numerous herbal decoctions and natural compounds derived from traditional herbal medicine showed promising therapeutic activities in animal models of colitis and have gained increasing attention from scientists in the study of UC. Some of these decoctions and compounds can effectively alleviate colonic inflammation and relieve clinical symptoms in animal models of colitis via regulating intestinal barrier function. While no study is available to review the underlying mechanisms of these potential therapies in regulating the integrity and function of the intestinal barrier. This review aims to summarize the effects of various herbal decoctions or bioactive compounds on the severity of colonic inflammation via various mechanisms, mainly including regulating the production of tight junction proteins, mucins, the composition of gut microbiota and microbial-associated metabolites, the infiltration of inflammatory cells and mediators, and the oxidative stress in the gut. On this basis, we discussed the related regulators and the affected signaling pathways of the mentioned traditional medicine in modulating the disruption or restoration of the intestinal barrier, such as NF-κB/MAPK, PI3K, and HIF-1α signaling pathways. In addition, the possible limitations of current studies and a prospect for future investigation and development of new UC therapies are provided based on our knowledge and current understanding. This review may improve our understanding of the current progression in studies of traditional medicine-derived therapies in protecting the intestinal barrier function and their roles in alleviating animal models of UC. It may be beneficial to the work of researchers in both basic and translational studies of UC.
Collapse
Affiliation(s)
- Qiuyun Xu
- Department of Immunology, School of Medicine, Nantong University, Nantong, Jiangsu, China
| | - Yuan Yao
- Department of Immunology, School of Medicine, Nantong University, Nantong, Jiangsu, China
| | - Yongchao Liu
- Department of Immunology, School of Medicine, Nantong University, Nantong, Jiangsu, China
| | - Jie Zhang
- Department of Immunology, School of Medicine, Nantong University, Nantong, Jiangsu, China
| | - Liming Mao
- Department of Immunology, School of Medicine, Nantong University, Nantong, Jiangsu, China
- Basic Medical Research Center, School of Medicine, Nantong University, Nantong, China
| |
Collapse
|
3
|
Kadoya K, Tanaka T, Mori N, Matono S, Hino H, Nishida R, Saisho K, Fujisaki M, Komukai S, Yanagawa T, Fujita H, Akagi Y. Changes in Acidity Levels in the Gastric Tube After Esophagectomy for Esophageal Cancer. Kurume Med J 2023. [PMID: 37005290 DOI: 10.2739/kurumemedj.ms682005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Abstract
Reflux esophagitis and gastric tube ulcer sometimes cause severe clinical problems in patients undergoing esophagectomy with gastric tube reconstruction. We previously reported that acidity in the gastric tube was decreased for 1 year after esophagectomy, and that lower acidity levels were associated with Helicobacter pylori (H. pylori) infection. However, the long-term changes in gastric acidity remain unknown. We aimed to investigate the long-term changes in gastric acidity after surgery. Eighty-nine patients who underwent esophagectomy with gastric tube reconstruction for esophageal cancer were analyzed. They underwent 24-hour pH monitoring, serum gastrin measurement, and H. pylori infection examination before surgery, at 1 month, 1 year, and 2 years after surgery. The gastric acidity at 1 month and 1 year after surgery was significantly lower than that before surgery (p=0.003, p=0.003). However, there was no difference in gastric acidity before and 2 years after surgery. The gas tric acidity in H. pylori-infected patients was significantly lower in comparison to non-infected patients at each time point (p=0.0003, p<0.0001, p<0.0001, p<0.0001, respectively). In H. pylori-infected patients, gastric acid ity was decreased for 1 year after surgery, and recovered within 2 years after surgery. However, no significant differences were observed in the acidity levels of non-infected patients during the 2-year follow-up period. The serum gastrin level increased after esophagectomy. The acidity levels in the gastric tube recovered within 2 years after surgery. Periodic endoscopy examination is recommended for early detection of acid-related disease, such as reflux esophagitis or gastric tube ulcer, after esophagectomy with gastric tube reconstruction.
Collapse
Affiliation(s)
| | | | - Naoki Mori
- Department of Surgery, Kurume University School of Medicine
| | - Satoru Matono
- Department of Surgery, Kurume University School of Medicine
| | - Haruhiro Hino
- Department of Surgery, Kurume University School of Medicine
| | | | - Kohei Saisho
- Department of Surgery, Kurume University School of Medicine
| | | | - Syou Komukai
- Division of Biomedical Statistics, Department of Integrated Medicine, Graduate School of Medicine, Osaka University
| | | | | | - Yoshito Akagi
- Department of Surgery, Kurume University School of Medicine
| |
Collapse
|
4
|
Liu F, Nong X, Qu W, Li X. Weikangling capsules combined with omeprazole ameliorates ethanol-induced chronic gastritis by regulating gut microbiota and EGF-EGFR-ERK pathway. Life Sci 2023; 315:121368. [PMID: 36623766 DOI: 10.1016/j.lfs.2023.121368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 12/22/2022] [Accepted: 01/01/2023] [Indexed: 01/09/2023]
Abstract
AIMS Weikangling capsules (WKLCs) have been widely used in the treatment of chronic gastritis. Whether used alone or combined with omeprazole (OME), it shows a significant effect. However, the mechanisms haven't been established. The study aimed to explore the mechanisms of WKLCs and its combination with OME on chronic gastritis. MAIN METHODS The components of WKLCs and EA (the ethyl acetate extraction extracted from WKLCs) fraction were analyzed. Then chronic gastritis model rats were induced by 56 % ethanol and treated with OME, low dose of WKLCs (WKL), high dose of WKLCs (WKH), WKLCs combined with OME (WO), and EA fraction (EA) to evaluate the mechanisms of WKLCs, drug combination and EA fraction. KEY FINDINGS A total of 22 components of WKLCs were quantified, among them 18 were enriched in EA fraction. WKLCs alleviated the morphology and inflammation of gastric mucosa and downregulated the levels of inflammatory factors (IL-1β, TNF-α, IL-6) and epidermal growth factor (EGF) in serum by inhibiting the EGF-EGFR-ERK pathway, regulating gut microbiota composition and SCFAs contents in feces. WKLCs plus OME was better than OME. EA fraction improved digestive function by increasing pepsin activity and decreasing gastrointestinal hormones (GAS and VIP) compared with WKLCs. SIGNIFICANCE This study elucidated that the effect of WKLCs and its combination with OME in the treatment of chronic gastritis was attributed to regulating the composition of the gut microbiota and inhibiting the EGF-EGFR-ERK pathway. The EA fraction is an inseparable effective substance of WKLCs. This study provides scientific evidence for clinical application.
Collapse
Affiliation(s)
- Feng Liu
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Xiaojing Nong
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Wenhua Qu
- Heilongjiang Sunflower Pharmaceutical Co. Ltd., Heilongjiang 150070, China
| | - Xiaobo Li
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China.
| |
Collapse
|
5
|
Mechanism of Traditional Tibetan Medicine Grubthobrildkr Alleviated Gastric Ulcer Induced by Acute Systemic Hypoxia in Rats. BIOMED RESEARCH INTERNATIONAL 2022; 2022:4803956. [PMID: 35425842 PMCID: PMC9005313 DOI: 10.1155/2022/4803956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 03/04/2022] [Indexed: 11/26/2022]
Abstract
Objective This study was aimed at investigating the potential mechanism of Grubthobrildkr (GTB) on systemic hypoxia-induced gastric ulcers in rats and at detecting the chemical profile of GTB. Methods Male Sprague-Dawley rats were separated into control, hypoxia, hypoxia+omeprazole, and hypoxia+GTBs (0.25, 0.5, and 1.0 g·kg−1·d−1) groups. Systemic hypoxia was created in a hypobaric chamber to simulate 5000 m high altitude by adjusting the inner pressure and oxygen content for 6 days. After that, the ulcer index, pH, and volume of gastric juice were assessed. The levels of endothelin-1 (ET-1), gastrin (GAS), motilin (MTL), phospholipase A2 (PLA2), and prostaglandin E2 (PGE2) were detected by ELISA. The expression level of hydrogen potassium ATPase (H+-K+-ATPase), cyclooxygenase-1 (COX-1), and cyclooxygenase-2 (COX-2) was tested by western blotting. Chemical profile of GTB was revealed by UHPLC-Q-exactive hybrid quadrupole-orbitrap mass (UHPLC-Q-Orbitrap MS). Results GTB decreased the ulcer index in rats under hypoxia for six days, which was related to increased pH and volume of gastric juice, enhanced MTL and PGE2 levels, and decreased ET-1 and PLA2 levels of gastric mucosa. Furthermore, GTB decreased the level of H+-K+-ATPase and COX-2 while increased COX-1 levels in gastric mucosal tissue. 44 constituents were identified by UHPLC-Q-Orbitrap MS in GTB. Conclusion GTB exerted a gastroprotective effect to alleviate gastric ulceration induced by acute systemic hypoxia in rats. The effect of GTB increasing the volume and pH of gastric juice in rats under acute systemic hypoxia could be regulated by gastrointestinal hormones, including MTL and ET-1. Mechanically, gastrointestinal protection of GTB was based on inhibition of the protons pumping H+-K+-ATPase and regulation of prostaglandin family in rats.
Collapse
|
6
|
O'Farrell C, Stamatopoulos K, Simmons M, Batchelor H. In vitro models to evaluate ingestible devices: Present status and current trends. Adv Drug Deliv Rev 2021; 178:113924. [PMID: 34390774 DOI: 10.1016/j.addr.2021.113924] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 08/03/2021] [Accepted: 08/09/2021] [Indexed: 12/14/2022]
Abstract
Orally ingestible medical devices offer significant opportunity in the diagnosis and treatment of gastrointestinal conditions. Their development necessitates the use of models that simulate the gastrointestinal environment on both a macro and micro scale. An evolution in scientific technology has enabled a wide range of in vitro, ex vivo and in vivo models to be developed that replicate the gastrointestinal tract. This review describes the landscape of the existing range of in vitro tools that are available to characterize ingestible devices. Models are presented with details on their benefits and limitations with regards to the evaluation of ingestible devices and examples of their use in the evaluation of such devices is presented where available. The multitude of models available provides a suite of tools that can be used in the evaluation of ingestible devices that should be selected on the functionality of the device and the mechanism of its function.
Collapse
Affiliation(s)
- Connor O'Farrell
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Konstantinos Stamatopoulos
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK; Biopharmaceutics, Pharmaceutical Development, PDS, MST, RD Platform Technology & Science, GSK, David Jack Centre, Park Road, Ware, Hertfordshire SG12 0DP, UK
| | - Mark Simmons
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Hannah Batchelor
- Strathclyde Institute of Pharmacy and Biomedical Sciences, 161 Cathedral Street, Glasgow G4 0RE, UK.
| |
Collapse
|
7
|
Kim HY, Lee JM, Lee YS, Li S, Lee SJ, Bae SC, Jung HS. Runx3 regulates iron metabolism via modulation of BMP signalling. Cell Prolif 2021; 54:e13138. [PMID: 34611951 PMCID: PMC8666273 DOI: 10.1111/cpr.13138] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Revised: 09/13/2021] [Accepted: 09/20/2021] [Indexed: 12/11/2022] Open
Abstract
Objectives Runx3, a member of the Runx family of transcription factors, has been studied as a tumour suppressor and key player of organ development. In a previous study, we reported differentiation failure and excessive angiogenesis in the liver of Runx3 knock‐out (KO) mice. Here, we examined a function of the Runx3 in liver, especially in iron metabolism. Methods We performed histological and immunohistological analyses of the Runx3 KO mouse liver. RNA‐sequencing analyses were performed on primary hepatocytes isolated from Runx3 conditional KO (cKO) mice. The effect of Runx3 knock‐down (KD) was also investigated using siRNA‐mediated KD in functional human hepatocytes and human hepatocellular carcinoma cells. Result We observed an iron‐overloaded liver with decreased expression of hepcidin in Runx3 KO mice. Expression of BMP6, a regulator of hepcidin transcription, and activity of the BMP pathway were decreased in the liver tissue of Runx3 KO mice. Transcriptome analysis on primary hepatocytes isolated from Runx3 cKO mice also revealed that iron‐induced increase in BMP6 was mediated by Runx3. Similar results were observed in Runx3 knock‐down experiments using HepaRG cells and HepG2 cells. Finally, we showed that Runx3 enhanced the activity of the BMP6 promoter by responding to iron stimuli in the hepatocytes. Conclusion In conclusion, we suggest that Runx3 plays important roles in iron metabolism of the liver through regulation of BMP signalling.
Collapse
Affiliation(s)
- Hyun-Yi Kim
- Division in Anatomy and Developmental Biology, Department of Oral Biology, Oral Science Research Center, BK21 FOUR, Yonsei University College of Dentistry, Seoul, Korea
| | - Jong-Min Lee
- Division in Anatomy and Developmental Biology, Department of Oral Biology, Oral Science Research Center, BK21 FOUR, Yonsei University College of Dentistry, Seoul, Korea
| | - You-Soub Lee
- Department of Biochemistry, School of Medicine, and Institute for Tumor Research, Chungbuk National University, Cheongju, Korea
| | - Shujin Li
- Division in Anatomy and Developmental Biology, Department of Oral Biology, Oral Science Research Center, BK21 FOUR, Yonsei University College of Dentistry, Seoul, Korea
| | - Seung-Jun Lee
- Division in Anatomy and Developmental Biology, Department of Oral Biology, Oral Science Research Center, BK21 FOUR, Yonsei University College of Dentistry, Seoul, Korea
| | - Suk-Chul Bae
- Department of Biochemistry, School of Medicine, and Institute for Tumor Research, Chungbuk National University, Cheongju, Korea
| | - Han-Sung Jung
- Division in Anatomy and Developmental Biology, Department of Oral Biology, Oral Science Research Center, BK21 FOUR, Yonsei University College of Dentistry, Seoul, Korea
| |
Collapse
|
8
|
Oral Drug Delivery: Conventional to Long Acting New-Age Designs. Eur J Pharm Biopharm 2021; 162:23-42. [PMID: 33631319 DOI: 10.1016/j.ejpb.2021.02.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 01/16/2021] [Accepted: 02/14/2021] [Indexed: 12/13/2022]
Abstract
The Oral route of administration forms the heartwood of the ever-growing tree of drug delivery technology. It is one of the most preferred dosage forms among patients and controlled release community. Despite the high patient compliance, the deliveries of anti-cancerous drugs, vaccines, proteins, etc. via the oral route are limited and have recorded a very low bioavailability. The oral administration must overcome the physiological barriers (low solubility, permeation and early degradation) to achieve efficient and sustained delivery. This review aims at highlighting the conventional and modern-age strategies that address some of these physiological barriers. The modern age designs include the 3D printed devices and formulations. The superiority of 3D dosage forms over conventional cargos is summarized with a focus on long-acting designs. The innovations in Pharmaceutical organizations (Lyndra, Assertio and Intec) that have taken giant steps towards commercialization of long-acting vehicles are discussed. The recent advancements made in the arena of oral peptide delivery are also highlighted. The review represents a comprehensive journey from Nano-formulations to micro-fabricated oral implants aiming at specific patient-centric designs.
Collapse
|
9
|
Paz MFCJ, de Alencar MVOB, de Lima RMP, Sobral ALP, do Nascimento GTM, dos Reis CA, Coêlho MDPSDS, do Nascimento MLLB, Gomes Júnior AL, Machado KDC, de Menezes AAPM, de Lima RMT, de Oliveira Filho JWG, Dias ACS, dos Reis AC, da Mata AMOF, Machado SA, Sousa CDDC, da Silva FCC, Islam MT, de Castro e Sousa JM, Melo Cavalcante AADC. Pharmacological Effects and Toxicogenetic Impacts of Omeprazole: Genomic Instability and Cancer. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:3457890. [PMID: 32308801 PMCID: PMC7146093 DOI: 10.1155/2020/3457890] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 10/19/2019] [Accepted: 11/21/2019] [Indexed: 12/15/2022]
Abstract
Omeprazole (OME) is commonly used to treat gastrointestinal disorders. However, long-term use of OME can increase the risk of gastric cancer. We aimed to characterize the pharmacological effects of OME and to correlate its adverse effects and toxicogenetic risks to the genomic instability mechanisms and cancer-based on database reports. Thus, a search (till Aug 2019) was made in the PubMed, Scopus, and ScienceDirect with relevant keywords. Based on the study objective, we included 80 clinical reports, forty-six in vitro, and 76 in vivo studies. While controversial, the findings suggest that long-term use of OME (5 to 40 mg/kg) can induce genomic instability. On the other hand, OME-mediated protective effects are well reported and related to proton pump blockade and anti-inflammatory activity through an increase in gastric flow, anti-inflammatory markers (COX-2 and interleukins) and antiapoptotic markers (caspases and BCL-2), glycoprotein expression, and neutrophil infiltration reduction. The reported adverse and toxic effects, especially in clinical studies, were atrophic gastritis, cobalamin deficiencies, homeostasis disorders, polyp development, hepatotoxicity, cytotoxicity, and genotoxicity. This study highlights that OME may induce genomic instability and increase the risk of certain types of cancer. Therefore, adequate precautions should be taken, especially in its long-term therapeutic strategies and self-medication practices.
Collapse
Affiliation(s)
- Márcia Fernanda Correia Jardim Paz
- Postgraduate Program in Biotechnology (RENORBIO), Federal University of Piauí, Teresina, PI, Brazil
- Laboratory of Genetic Toxicity, Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, PI, Brazil
| | | | | | - André Luiz Pinho Sobral
- Laboratory of Genetic Toxicity, Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, PI, Brazil
- University Hospital, Teresina, PI, Brazil
| | | | | | | | | | - Antonio Luiz Gomes Júnior
- Laboratory of Genetic Toxicity, Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, PI, Brazil
- University Centre UNINOVAFAPI, Teresina, PI, Brazil
| | | | | | - Rosália Maria Torres de Lima
- Laboratory of Genetic Toxicity, Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, PI, Brazil
| | | | - Ana Carolina Soares Dias
- Laboratory of Genetics and Molecular Biology, Federal University of Maranhão, São Luís, MA, Brazil
| | - Antonielly Campinho dos Reis
- Laboratory of Genetic Toxicity, Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, PI, Brazil
| | | | | | | | - Felipe Cavalcanti Carneiro da Silva
- Postgraduate Program in Biotechnology (RENORBIO), Federal University of Piauí, Teresina, PI, Brazil
- Department of Biological Sciences, Federal University of Piauí, Picos, PI, Brazil
| | - Muhammad Torequl Islam
- Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam
- Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam
| | | | - Ana Amélia de Carvalho Melo Cavalcante
- Postgraduate Program in Biotechnology (RENORBIO), Federal University of Piauí, Teresina, PI, Brazil
- Laboratory of Genetic Toxicity, Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, PI, Brazil
| |
Collapse
|
10
|
Perry SL, McClements DJ. Recent Advances in Encapsulation, Protection, and Oral Delivery of Bioactive Proteins and Peptides using Colloidal Systems. Molecules 2020; 25:E1161. [PMID: 32150848 PMCID: PMC7179163 DOI: 10.3390/molecules25051161] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 03/01/2020] [Accepted: 03/02/2020] [Indexed: 02/07/2023] Open
Abstract
There are many areas in medicine and industry where it would be advantageous to orally deliver bioactive proteins and peptides (BPPs), including ACE inhibitors, antimicrobials, antioxidants, hormones, enzymes, and vaccines. A major challenge in this area is that many BPPs degrade during storage of the product or during passage through the human gut, thereby losing their activity. Moreover, many BPPs have undesirable taste profiles (such as bitterness or astringency), which makes them unpleasant to consume. These challenges can often be overcome by encapsulating them within colloidal particles that protect them from any adverse conditions in their environment, but then release them at the desired site-of-action, which may be inside the gut or body. This article begins with a discussion of BPP characteristics and the hurdles involved in their delivery. It then highlights the characteristics of colloidal particles that can be manipulated to create effective BPP-delivery systems, including particle composition, size, and interfacial properties. The factors impacting the functional performance of colloidal delivery systems are then highlighted, including their loading capacity, encapsulation efficiency, protective properties, retention/release properties, and stability. Different kinds of colloidal delivery systems suitable for encapsulation of BPPs are then reviewed, such as microemulsions, emulsions, solid lipid particles, liposomes, and microgels. Finally, some examples of the use of colloidal delivery systems for delivery of specific BPPs are given, including hormones, enzymes, vaccines, antimicrobials, and ACE inhibitors. An emphasis is on the development of food-grade colloidal delivery systems, which could be used in functional or medical food applications. The knowledge presented should facilitate the design of more effective vehicles for the oral delivery of bioactive proteins and peptides.
Collapse
Affiliation(s)
- Sarah L. Perry
- Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, MA 01003, USA;
| | - David Julian McClements
- Department of Food Science, University of Massachusetts Amherst, Amherst, MA 01003, USA
- Department of Food Science & Bioengineering, Zhejiang Gongshang University, 18 Xuezheng Street, Hangzhou 310018, China
| |
Collapse
|
11
|
de Araújo Rodrigues P, de Morais SM, Aguiar LA, Vila-Nova NS, Benjamin SR. Effect of Byrsonima sericea DC. leaf extracts on mice gastrointestinal tract. Toxicol Rep 2019; 6:1182-1187. [PMID: 31763182 PMCID: PMC6861650 DOI: 10.1016/j.toxrep.2019.10.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 10/13/2019] [Accepted: 10/18/2019] [Indexed: 02/06/2023] Open
Abstract
Byrsonima sericea DC. (Malpighiaceae) was studied for phenolic contents. Byrsonima sericea (BSEE) ethanolic extracts explored Indomethacin induced gastric lesion. BSEE lowers rates of AST, ALT, animal weight and relative organ weight. Anti-diarrheal and antioxidant activity from leaf extracts were observed in the current investigation.
Byrsonima sericea DC. (Malpighiaceae) leaves are popularly folk medicine in Brazil used to treat gastro-intestinal disorders including diarrhea and gastric diseases. Ethanol extract (BSEE), ethyl acetate extract (BSEAE) and hexane extract (BSHE) of the leaf part of Byrsonima sericea DC were characterized for their total phenolics, proanthocyanidins and flavonoids content. The total antioxidant capacity of extracts was determined. The ethnopharmacological use of B. sericea leaves was evaluated by assaying BSEE for gastroprotective activity in stomach ulcer induced by indomethacin, intestinal motility and toxicity. Abundance of phenols mainly tannins was found in BSEE. Total phenolics, flavonoids and proanthocyanidins content in BSEE were found to be 0.371, 0.172 and 1.3 × 10-4 (mg/g) respectively. BSEE showed concentration dependent significant scavenging of DPPH values 90.0 (%) respectively. Moreover, oral doses of 500 and 1000 mg/kg did not cause mortality, and there was no difference in animals weight, organs relative weight and alanine transaminase (ALT) and aspartate transaminase (AST), as compared to the control group. Doses of 250, 500 and 1000 mg/kg inhibited the gastric lesions induced by indomethacin in 52, 60 and 62 % respectively. The dose of 1000 mg/kg decreased intestinal motility in animals. The presence of phenolic compounds, including tannins could be associated with the anti-diarrheal action and the antioxidant properties could collaborate to the gastroprotective and anti- diarrheal activities, confirming its popular use of the plant.
Collapse
Key Words
- ALT, alanine transaminase
- ANOVA, one-way analysis of variance
- AST, aspartate transaminase
- Antioxidants
- BSEAE, Byrsonima sericea ethyl acetate extract
- BSEE, Byrsonima sericea ethanol extract
- BSHE, Byrsonima sericea hexane extract
- Byrsonima sericea DC
- DMSO, dimethyl sulfoxide
- DPPH, 2,2-diphenyl-1- picrylhydrazyl
- Gastroprotective
- HPLC-DAD, high performance liquid chromatography-diode array detector
- Indomethacin
- MS, mass spectrometry
- NSAIDs, nonsteroidal anti-inflammatory drugs
- PGE2, prostaglandin
- PI, inhibition potential
- SD, standard deviation
- Toxicity
- im, intra-muscular
Collapse
Affiliation(s)
- Patrícia de Araújo Rodrigues
- Laboratório de Química de Produtos Naturais, Universidade Estadual do Ceará, Av. Doutor Silas Munguba, 1700, CEP 60740-000, Campus do Itaperi, Fortaleza, Ceará, Brazil
| | - Selene Maia de Morais
- Laboratório de Química de Produtos Naturais, Universidade Estadual do Ceará, Av. Doutor Silas Munguba, 1700, CEP 60740-000, Campus do Itaperi, Fortaleza, Ceará, Brazil
| | - Liza Araújo Aguiar
- Laboratório de Química de Produtos Naturais, Universidade Estadual do Ceará, Av. Doutor Silas Munguba, 1700, CEP 60740-000, Campus do Itaperi, Fortaleza, Ceará, Brazil
| | - Nadja Soares Vila-Nova
- Faculdade de Enfermagem Nova Esperança, Departamento de Medicina Veterinária, Av. Frei Galvão 12 Gramame, João Pessoa, Paraíba, Brazil
| | - Stephen Rathinaraj Benjamin
- Laboratório de Química de Produtos Naturais, Universidade Estadual do Ceará, Av. Doutor Silas Munguba, 1700, CEP 60740-000, Campus do Itaperi, Fortaleza, Ceará, Brazil
| |
Collapse
|
12
|
Stress Ulcer Prophylaxis-Friend or Foe? Crit Care Med 2019. [PMID: 28622218 DOI: 10.1097/ccm.0000000000002489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
13
|
Du GM, Luo BP, Hu ZH, Wu JG, Yan WM, Han ZQ, Zhang YH, Liu MJ. The effect of ghrelin O-acyltransferase inhibitor on gastric H +-K +-ATPase activity and GOAT/ghrelin system in gastric mucosal cells in vitro. Gen Comp Endocrinol 2018; 267:167-171. [PMID: 29966658 DOI: 10.1016/j.ygcen.2018.06.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 06/22/2018] [Accepted: 06/29/2018] [Indexed: 11/25/2022]
Abstract
Ghrelin is implicated in the regulation of gastric functional development. The octanoylation of ghrelin is critical for its physiological functions which dependent upon ghrelin O-acyltransferase (GOAT) catalyzation. To investigate the effect of GOAT on gastric acid secretion and expression of ghrelin in vitro. Primary cultures of gastric mucosal cells were challenged with 1.5 × 10-5, 1.5 × 10-4 and 1.5 × 10-3 mol/mL GO-CoA-Tat (The GOAT inhibitor), respectively, for 24 h in order to further clarify the effect of GOAT on H+-K+-ATPase activity. In vitro, GO-CoA-Tat significantly increased ghrelin and GOAT mRNA expression at 1.5 × 10-5, 1.5 × 10-4 and 1.5 × 10-3 mol/mL, and augmented cell total ghrelin secretion at 1.5 × 10-3 mol/mL. But cell acylated ghrelin secretion was reduced at 1.5 × 10-3 mol/mL GO-CoA-Tat (P < 0.05). And cell acylated ghrelin synthesis was reduced at 1.5 × 10-4 and 1.5 × 10-3 mol/mL GO-CoA-Tat (P < 0.05). In accordance with acylated ghrelin level, H+-K+-ATPase activity were decreased with 1.5 × 10-4 and 1.5 × 10-3 mol/mL GO-CoA-Tat (P < 0.05). These results indicated that GOAT inhibitor decreases the acylated ghrelin level and H+-K+-ATPase activity in vitro.
Collapse
Affiliation(s)
- Gai Mei Du
- Department of Animal Science and Technology, Jinling Technology Institution, Nanjing 210038, PR China
| | - Bi Ping Luo
- Department of Animal Science and Technology, Jinling Technology Institution, Nanjing 210038, PR China
| | - Zhi Hua Hu
- Department of Animal Science and Technology, Jinling Technology Institution, Nanjing 210038, PR China
| | - Jie Ge Wu
- Department of Animal Science and Technology, Jinling Technology Institution, Nanjing 210038, PR China
| | - Wen Mei Yan
- Department of Animal Science and Technology, Jinling Technology Institution, Nanjing 210038, PR China
| | - Zheng Qiang Han
- Department of Animal Science and Technology, Jinling Technology Institution, Nanjing 210038, PR China
| | - Yu Hong Zhang
- Department of Animal Science and Technology, Jinling Technology Institution, Nanjing 210038, PR China
| | - Mao Jun Liu
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bio-products, Nanjing 210014, PR China; Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Nanjing, PR China.
| |
Collapse
|
14
|
Shiotani A, Katsumata R, Gouda K, Fukushima S, Nakato R, Murao T, Ishii M, Fujita M, Matsumoto H, Sakakibara T. Hypergastrinemia in Long-Term Use of Proton Pump Inhibitors. Digestion 2018; 97:154-162. [PMID: 29310112 DOI: 10.1159/000484688] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 10/30/2017] [Indexed: 02/04/2023]
Abstract
BACKGROUND/AIM The use of proton pump inhibitors (PPIs) is known to lead to hypergastrinemia; however, the data in patients with atrophic gastritis is still lacking. The aim of this study was to investigate the effects of long-term PPIs use on the gastrin levels in patients with atrophic gastritis and to determine factors affecting hypergastrinemia in long-term users of PPIs. METHODS Serum Helicobacter pylori IgG, gastrin and pepsinogen levels were measured. Atrophic gastritis was assessed by upper gastrointestinal endoscopies based on the Kimura-Takemoto classification and pepsinogen levels. CYP2C19 polymorphisms were assessed using DNA extracted from peripheral blood. RESULTS A total number of 382 patients (275 men and 107 women) were enrolled. Median serum gastrin levels were higher in PPI users than in non- users (234 vs. 113 pg/mL, p < 0.001) and in women than in men (252 vs. 155 pg/mL, p = 0.006). Gastrin levels were significantly associated with corpus atrophy only in the subgroup of non-users of PPIs. Multivariate analysis revealed that hypergastrinemia (over 150 pg/mL) was significantly associated with PPI use (OR 5.30; 95% CI 3.32-8.47), women (OR 2.22; 95% CI 1.33-3.72) and corpus atrophy (OR 1.82; 95% CI 1.14-2.90). CONCLUSION PPI use, women and corpus atrophy were risk factors for hypergastrinemia. Gender, but not corpus atrophy, affected the gastrin levels in long-term users of PPIs.
Collapse
Affiliation(s)
- Akiko Shiotani
- Division of Gastroenterology, Department of Internal Medicine, Kawasaki Medical School, Kurashiki, Japan
| | - Ryo Katsumata
- Division of Gastroenterology, Department of Internal Medicine, Kawasaki Medical School, Kurashiki, Japan
| | - Kyousuke Gouda
- Division of Gastroenterology, Department of Internal Medicine, Kawasaki Medical School, Kurashiki, Japan
| | - Shinya Fukushima
- Division of Gastroenterology, Department of Internal Medicine, Kawasaki Medical School, Kurashiki, Japan
| | - Rui Nakato
- Division of Gastroenterology, Department of Internal Medicine, Kawasaki Medical School, Kurashiki, Japan
| | - Takahisa Murao
- Division of Gastroenterology, Department of Internal Medicine, Kawasaki Medical School, Kurashiki, Japan
| | - Manabu Ishii
- Division of Gastroenterology, Department of Internal Medicine, Kawasaki Medical School, Kurashiki, Japan
| | - Minoru Fujita
- Division of Gastroenterology, Department of Internal Medicine, Kawasaki Medical School, Kurashiki, Japan
| | - Hiroshi Matsumoto
- Division of Gastroenterology, Department of Internal Medicine, Kawasaki Medical School, Kurashiki, Japan
| | - Takashi Sakakibara
- Department of Gastroenterology, Sakakibara Heart Institute of Okayama, Okayama, Japan
| |
Collapse
|
15
|
Encapsulation, protection, and delivery of bioactive proteins and peptides using nanoparticle and microparticle systems: A review. Adv Colloid Interface Sci 2018; 253:1-22. [PMID: 29478671 DOI: 10.1016/j.cis.2018.02.002] [Citation(s) in RCA: 201] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 02/08/2018] [Accepted: 02/09/2018] [Indexed: 12/21/2022]
Abstract
There are many examples of bioactive proteins and peptides that would benefit from oral delivery through functional foods, supplements, or medical foods, including hormones, enzymes, antimicrobials, vaccines, and ACE inhibitors. However, many of these bioactive proteins are highly susceptible to denaturation, aggregation or hydrolysis within commercial products or inside the human gastrointestinal tract (GIT). Moreover, many bioactive proteins have poor absorption characteristics within the GIT. Colloidal systems, which contain nanoparticles or microparticles, can be designed to encapsulate, retain, protect, and deliver bioactive proteins. For instance, a bioactive protein may have to remain encapsulated and stable during storage and passage through the mouth and stomach, but then be released within the small intestine where it can be absorbed. This article reviews the application of food-grade colloidal systems for oral delivery of bioactive proteins, including microemulsions, emulsions, nanoemulsions, solid lipid nanoparticles, multiple emulsions, liposomes, and microgels. It also provides a critical assessment of the characteristics of colloidal particles that impact the effectiveness of protein delivery systems, such as particle composition, size, permeability, interfacial properties, and stability. This information should be useful for the rational design of medical foods, functional foods, and supplements for effective oral delivery of bioactive proteins.
Collapse
|
16
|
Abstract
This narrative review summarises the benefits, risks and appropriate use of acid-suppressing drugs (ASDs), proton pump inhibitors and histamine-2 receptor antagonists, advocating a rationale balanced and individualised approach aimed to minimise any serious adverse consequences. It focuses on current controversies on the potential of ASDs to contribute to infections-bacterial, parasitic, fungal, protozoan and viral, particularly in the elderly, comprehensively and critically discusses the growing body of observational literature linking ASD use to a variety of enteric, respiratory, skin and systemic infectious diseases and complications (Clostridium difficile diarrhoea, pneumonia, spontaneous bacterial peritonitis, septicaemia and other). The proposed pathogenic mechanisms of ASD-associated infections (related and unrelated to the inhibition of gastric acid secretion, alterations of the gut microbiome and immunity), and drug-drug interactions are also described. Both probiotics use and correcting vitamin D status may have a significant protective effect decreasing the incidence of ASD-associated infections, especially in the elderly. Despite the limitations of the existing data, the importance of individualised therapy and caution in long-term ASD use considering the balance of benefits and potential harms, factors that may predispose to and actions that may prevent/attenuate adverse effects is evident. A six-step practical algorithm for ASD therapy based on the best available evidence is presented.
Collapse
|
17
|
DALLAS DAVIDC, SANCTUARY MEGANR, QU YUNYAO, KHAJAVI SHABNAMHAGHIGHAT, VAN ZANDT ALEXANDRIAE, DYANDRA MELISSA, FRESE STEVENA, BARILE DANIELA, GERMAN JBRUCE. Personalizing protein nourishment. Crit Rev Food Sci Nutr 2017; 57:3313-3331. [PMID: 26713355 PMCID: PMC4927412 DOI: 10.1080/10408398.2015.1117412] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Proteins are not equally digestible-their proteolytic susceptibility varies by their source and processing method. Incomplete digestion increases colonic microbial protein fermentation (putrefaction), which produces toxic metabolites that can induce inflammation in vitro and have been associated with inflammation in vivo. Individual humans differ in protein digestive capacity based on phenotypes, particularly disease states. To avoid putrefaction-induced intestinal inflammation, protein sources, and processing methods must be tailored to the consumer's digestive capacity. This review explores how food processing techniques alter protein digestibility and examines how physiological conditions alter digestive capacity. Possible solutions to improving digestive function or matching low digestive capacity with more digestible protein sources are explored. Beyond the ileal digestibility measurements of protein digestibility, less invasive, quicker and cheaper techniques for monitoring the extent of protein digestion and fermentation are needed to personalize protein nourishment. Biomarkers of protein digestive capacity and efficiency can be identified with the toolsets of peptidomics, metabolomics, microbial sequencing and multiplexed protein analysis of fecal and urine samples. By monitoring individual protein digestive function, the protein component of diets can be tailored via protein source and processing selection to match individual needs to minimize colonic putrefaction and, thus, optimize gut health.
Collapse
Affiliation(s)
- DAVID C. DALLAS
- Department of Food Science and Technology, University of California, Davis, One Shields Avenue, Davis, CA 95616, United States
- Foods for Health Institute, University of California, Davis, One Shields Avenue, Davis, CA 95616, United States
| | - MEGAN R. SANCTUARY
- Foods for Health Institute, University of California, Davis, One Shields Avenue, Davis, CA 95616, United States
- Department of Nutrition, University of California, Davis, One Shields Avenue, Davis, CA 95616, United States
| | - YUNYAO QU
- Department of Food Science and Technology, University of California, Davis, One Shields Avenue, Davis, CA 95616, United States
| | - SHABNAM HAGHIGHAT KHAJAVI
- Department of Food Science and Technology, University of California, Davis, One Shields Avenue, Davis, CA 95616, United States
- Department of Food Science and Technology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - ALEXANDRIA E. VAN ZANDT
- Department of Nutrition, University of California, Davis, One Shields Avenue, Davis, CA 95616, United States
| | - MELISSA DYANDRA
- Department of Food Science and Technology, University of California, Davis, One Shields Avenue, Davis, CA 95616, United States
| | - STEVEN A. FRESE
- Department of Food Science and Technology, University of California, Davis, One Shields Avenue, Davis, CA 95616, United States
- Foods for Health Institute, University of California, Davis, One Shields Avenue, Davis, CA 95616, United States
| | - DANIELA BARILE
- Department of Food Science and Technology, University of California, Davis, One Shields Avenue, Davis, CA 95616, United States
- Foods for Health Institute, University of California, Davis, One Shields Avenue, Davis, CA 95616, United States
| | - J. BRUCE GERMAN
- Department of Food Science and Technology, University of California, Davis, One Shields Avenue, Davis, CA 95616, United States
- Foods for Health Institute, University of California, Davis, One Shields Avenue, Davis, CA 95616, United States
| |
Collapse
|
18
|
Huang R, Han J, Tian S, Cai R, Sun J, Shen Y, Wang S. Association of plasma ghrelin levels and ghrelin rs4684677 polymorphism with mild cognitive impairment in type 2 diabetic patients. Oncotarget 2017; 8:15126-15135. [PMID: 28146431 PMCID: PMC5362472 DOI: 10.18632/oncotarget.14852] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 01/16/2017] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND AND AIMS People with insulin resistance and type 2 diabetes mellitus (T2DM) are at increased risks of cognitive impairment. We aimed to investigate the association of plasma ghrelin levels and ghrelin rs4684677 polymorphism with mild cognitive impairment (MCI) in T2DM patients. RESULTS In addition to elevated glycosylated hemoglobin (HbA1c), fasting blood glucose (FBG) and homeostasis model assessment of insulin resistance (HOMA-IR), T2DM patients with MCI had decreased plasma ghrelin levels compared with their healthy-cognition subjects (all p < 0.05). Further logistic regression analysis showed that ghrelin level was one of independent factors for MCI in T2DM patients (p < 0.05). Moreover, partial correlation analysis demonstrated that ghrelin levels were positively associated with the scores of Montreal Cognitive Assessment (r = 0.196, p = 0.041) and Auditory Verbal Learning Test-delayed recall (r = 0.197, p = 0.040) after adjustment for HbA1c, FBG and HOMA-IR, wherein the latter represented episodic memory functions. No significant differences were found for the distributions of genotype and allele of ghrelin rs4684677 polymorphism between MCI and control group. MATERIALS AND METHODS A total of 218 T2DM patients, with 112 patients who satisfied the MCI diagnostic criteria and 106 who exhibited healthy cognition, were enrolled in this study. Demographic characteristics, clinical variables and cognitive performances were extensively assessed. Plasma ghrelin levels and ghrelin rs4684677 polymorphism were also determined. CONCLUSIONS Our results suggest that decreased ghrelin levels are associated with MCI, especially with episodic memory dysfunction in T2DM populations.
Collapse
Affiliation(s)
- Rong Huang
- Department of Endocrinology, Affiliated ZhongDa Hospital of Southeast University, Nanjing, PR China, 210009.,Medical School of Southeast University, Nanjing, PR China, 210009
| | - Jing Han
- Department of Endocrinology, Affiliated ZhongDa Hospital of Southeast University, Nanjing, PR China, 210009
| | - Sai Tian
- Department of Endocrinology, Affiliated ZhongDa Hospital of Southeast University, Nanjing, PR China, 210009
| | - Rongrong Cai
- Department of Endocrinology, Affiliated ZhongDa Hospital of Southeast University, Nanjing, PR China, 210009
| | - Jie Sun
- Department of Endocrinology, Affiliated ZhongDa Hospital of Southeast University, Nanjing, PR China, 210009
| | - Yanjue Shen
- Department of Endocrinology, Affiliated ZhongDa Hospital of Southeast University, Nanjing, PR China, 210009
| | - Shaohua Wang
- Department of Endocrinology, Affiliated ZhongDa Hospital of Southeast University, Nanjing, PR China, 210009
| |
Collapse
|
19
|
Liu J, Li H, Sun L, Wang Z, Xing C, Yuan Y. Aberrantly methylated-differentially expressed genes and pathways in colorectal cancer. Cancer Cell Int 2017; 17:75. [PMID: 28794688 PMCID: PMC5545832 DOI: 10.1186/s12935-017-0444-4] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 08/02/2017] [Indexed: 12/12/2022] Open
Abstract
Background Methylation plays an important role in the etiology and pathogenesis of colorectal cancer (CRC). This study aimed to identify aberrantly methylated-differentially expressed genes (DEGs) and pathways in CRC by comprehensive bioinformatics analysis. Methods Data of gene expression microarrays (GSE68468, GSE44076) and gene methylation microarrays (GSE29490, GSE17648) were downloaded from GEO database. Aberrantly methylated-DEGs were obtained by GEO2R. Functional and enrichment analyses of selected genes were performed using DAVID database. Protein–protein interaction (PPI) network was constructed by STRING and visualized in Cytoscape. MCODE was used for module analysis of the PPI network. Results Totally 411 hypomethylation-high expression genes were identified, which were enriched in biological processes of response to wounding or inflammation, cell proliferation and adhesion. Pathway enrichment showed cytokine–cytokine receptor interaction, p53 signaling and cell cycle. The top 5 hub genes of PPI network were CAD, CCND1, ATM, RB1 and MET. Additionally, 239 hypermethylation-low expression genes were identified, which demonstrated enrichment in biological processes including cell–cell signaling, nerve impulse transmission, etc. Pathway analysis indicated enrichment in calcium signaling, maturity onset diabetes of the young, cell adhesion molecules, etc. The top 5 hub genes of PPI network were EGFR, ACTA1, SST, ESR1 and DNM2. After validation in TCGA database, most hub genes still remained significant. Conclusion In summary, our study indicated possible aberrantly methylated-differentially expressed genes and pathways in CRC by bioinformatics analysis, which may provide novel insights for unraveling pathogenesis of CRC. Hub genes including CAD, CCND1, ATM, RB1, MET, EGFR, ACTA1, SST, ESR1 and DNM2 might serve as aberrantly methylation-based biomarkers for precise diagnosis and treatment of CRC in the future.
Collapse
Affiliation(s)
- Jingwei Liu
- Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Affiliated Hospital of China Medical University, and Key Laboratory of Cancer Etiology and Prevention (China Medical University), Liaoning Provincial Education Department, Shenyang, 110001 China
| | - Hao Li
- Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Affiliated Hospital of China Medical University, and Key Laboratory of Cancer Etiology and Prevention (China Medical University), Liaoning Provincial Education Department, Shenyang, 110001 China
| | - Liping Sun
- Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Affiliated Hospital of China Medical University, and Key Laboratory of Cancer Etiology and Prevention (China Medical University), Liaoning Provincial Education Department, Shenyang, 110001 China
| | - Zhenning Wang
- Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Affiliated Hospital of China Medical University, and Key Laboratory of Cancer Etiology and Prevention (China Medical University), Liaoning Provincial Education Department, Shenyang, 110001 China
| | - Chengzhong Xing
- Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Affiliated Hospital of China Medical University, and Key Laboratory of Cancer Etiology and Prevention (China Medical University), Liaoning Provincial Education Department, Shenyang, 110001 China.,Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Affiliated Hospital of China Medical University, 155# North Nanjing Street, Heping District, Shenyang, 110001 Liaoning China
| | - Yuan Yuan
- Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Affiliated Hospital of China Medical University, and Key Laboratory of Cancer Etiology and Prevention (China Medical University), Liaoning Provincial Education Department, Shenyang, 110001 China.,Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Affiliated Hospital of China Medical University, 155# North Nanjing Street, Heping District, Shenyang, 110001 Liaoning China
| |
Collapse
|
20
|
Prieur A, Cappellini M, Habif G, Lefranc MP, Mazard T, Morency E, Pascussi JM, Flacelière M, Cahuzac N, Vire B, Dubuc B, Durochat A, Liaud P, Ollier J, Pfeiffer C, Poupeau S, Saywell V, Planque C, Assenat E, Bibeau F, Bourgaux JF, Pujol P, Sézeur A, Ychou M, Joubert D. Targeting the Wnt Pathway and Cancer Stem Cells with Anti-progastrin Humanized Antibodies as a Potential Treatment for K-RAS-Mutated Colorectal Cancer. Clin Cancer Res 2017; 23:5267-5280. [PMID: 28600477 DOI: 10.1158/1078-0432.ccr-17-0533] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 04/27/2017] [Accepted: 06/05/2017] [Indexed: 12/11/2022]
Abstract
Purpose: Patients with metastatic colorectal cancer suffer from disease relapse mainly due to cancer stem cells (CSC). Interestingly, they have an increased level of blood progastrin, a tumor-promoting peptide essential for the self-renewal of colon CSCs, which is also a direct β-catenin/TCF4 target gene. In this study, we aimed to develop a novel targeted therapy to neutralize secreted progastrin to inhibit Wnt signaling, CSCs, and reduce relapses.Experimental Design: Antibodies (monoclonal and humanized) directed against progastrin were produced and selected for target specificity and affinity. After validation of their effectiveness on survival of colorectal cancer cell lines harboring B-RAF or K-RAS mutations, their efficacy was assessed in vitro and in vivo, alone or concomitantly with chemotherapy, on CSC self-renewal capacity, tumor recurrence, and Wnt signaling.Results: We show that anti-progastrin antibodies decrease self-renewal of CSCs both in vitro and in vivo, either alone or in combination with chemotherapy. Furthermore, migration and invasion of colorectal cancer cells are diminished; chemosensitivity is prolonged in SW620 and HT29 cells and posttreatment relapse is significantly delayed in T84 cells, xenografted nude mice. Finally, we show that the Wnt signaling activity in vitro is decreased, and, in transgenic mice developing Wnt-driven intestinal neoplasia, the tumor burden is alleviated, with an amplification of cell differentiation in the remaining tumors.Conclusions: Altogether, these data show that humanized anti-progastrin antibodies might represent a potential new treatment for K-RAS-mutated colorectal patients, for which there is a crucial unmet medical need. Clin Cancer Res; 23(17); 5267-80. ©2017 AACR.
Collapse
Affiliation(s)
| | | | | | | | - Thibault Mazard
- Institut Régional du Cancer de Montpellier, Montpellier, France
| | | | | | | | | | | | | | | | | | | | | | | | | | - Chris Planque
- Institut de Génomique Fonctionnelle, Montpellier, France
| | - Eric Assenat
- Institut Régional du Cancer de Montpellier, Montpellier, France
| | - Frédéric Bibeau
- Institut Régional du Cancer de Montpellier, Montpellier, France
| | | | - Pascal Pujol
- Departement d'oncogénétique clinique, CHRU Montpellier, Montpellier, France
| | - Alain Sézeur
- Groupe Hospitalier Diaconesses Croix St Simon Chirurgie Digestive, Paris, France
| | - Marc Ychou
- Institut Régional du Cancer de Montpellier, Montpellier, France
| | | |
Collapse
|
21
|
Wessler S, Krisch LM, Elmer DP, Aberger F. From inflammation to gastric cancer - the importance of Hedgehog/GLI signaling in Helicobacter pylori-induced chronic inflammatory and neoplastic diseases. Cell Commun Signal 2017; 15:15. [PMID: 28427431 PMCID: PMC5397778 DOI: 10.1186/s12964-017-0171-4] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 04/07/2017] [Indexed: 02/07/2023] Open
Abstract
Infections with the human pathogen Helicobacter pylori (H. pylori) are closely associated with the development of inflammatory disorders and neoplastic transformation of the gastric epithelium. Drastic changes in the micromilieu involve a complex network of H. pylori-regulated signal transduction pathways leading to the release of proinflammatory cytokines, gut hormones and a wide range of signaling molecules. Besides controlling embryonic development, the Hedgehog/GLI signaling pathway also plays important roles in epithelial proliferation, differentiation, and regeneration of the gastric physiology, but also in the induction and progression of inflammation and neoplastic transformation in H. pylori infections. Here, we summarize recent findings of H. pylori-associated Hedgehog/GLI signaling in gastric homeostasis, malignant development and the modulation of the gastric tumor microenvironment.
Collapse
Affiliation(s)
- Silja Wessler
- Division of Microbiology, Cancer Cluster Salzburg, Department of Molecular Biology, Paris-Lodron University of Salzburg, Billroth Strasse 11, A-5020, Salzburg, Austria.
| | - Linda M Krisch
- Division of Microbiology, Cancer Cluster Salzburg, Department of Molecular Biology, Paris-Lodron University of Salzburg, Billroth Strasse 11, A-5020, Salzburg, Austria
| | - Dominik P Elmer
- Division of Molecular Tumor Biology, Cancer Cluster Salzburg, Department of Molecular Biology, Paris-Lodron University of Salzburg, Hellbrunner Strasse 34, A-5020, Salzburg, Austria
| | - Fritz Aberger
- Division of Molecular Tumor Biology, Cancer Cluster Salzburg, Department of Molecular Biology, Paris-Lodron University of Salzburg, Hellbrunner Strasse 34, A-5020, Salzburg, Austria.
| |
Collapse
|
22
|
Goldberg HR, Chin VL, Zitsman JL, Zhang C, Williams KM, Oberfield S, Fennoy I. Bariatric Surgery in Adolescents: Is Routine Nutrient Supplementation Sufficient to Avoid Anemia Following Bariatric Surgery? Nutr Clin Pract 2017; 32:502-507. [PMID: 28760109 DOI: 10.1177/0884533617690521] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Anemia following bariatric surgery is a known complication. To prevent nutrient deficiencies, adolescents require multivitamin/mineral supplementation following bariatric surgery. The purpose of this study was to investigate if routine multivitamin/mineral supplementation is sufficient to prevent anemia in adolescents undergoing bariatric surgery, particularly sleeve gastrectomy (SG), a procedure that may induce nutrient malabsorption. METHODS We conducted a retrospective review of pediatric patients who underwent SG (34 patients) and laparoscopic adjustable gastric banding (LAGB) (141 patients) (January 2006 through December 2013). We examined anemia marker levels (iron, ferritin, folate, B12, hemoglobin, and hematocrit) at first visit and 3, 6, and 12 months postsurgery by repeated-measures analysis adjusting for weight loss. RESULTS Following SG, folate levels decreased 3 and 6 months postsurgery but returned to baseline levels at 12 months. Furthermore, the SG group demonstrated lower folate levels compared with LAGB at 3 and 6 months. B12 levels decreased 6 months post-SG but returned to baseline at 12 months. Following LAGB, B12 levels decreased 12 months postsurgery compared with baseline. Ferritin levels decreased 3 months post-LAGB but returned to baseline levels at 6 months. There were no changes within groups or differences between groups in iron, hemoglobin, or hematocrit. CONCLUSIONS While anemia did not occur in any patients while on recommended routine supplementation, folate levels were significantly reduced following SG and were lower in SG compared with LAGB patients. Additional folate supplementation seemed to improve folate levels, which highlights the importance of ongoing surveillance by primary care providers and the need for additional folate supplementation following SG.
Collapse
Affiliation(s)
- Hanna R Goldberg
- 1 Institute of Human Nutrition, Columbia University Medical Center, New York, New York, USA.,2 University of Toronto, Faculty of Medicine, Toronto, Canada
| | - Vivian L Chin
- 3 Division of Pediatric Endocrinology, Columbia University Medical Center, New York, New York, USA.,4 Division of Pediatric Endocrinology, SUNY Downstate Medical Center, Brooklyn, New York, USA
| | - Jeffrey L Zitsman
- 5 Department of Surgery, Columbia University Medical Center, New York, New York, USA
| | - Chengchen Zhang
- 6 Department of Medicine, Columbia University Medical Center, New York, New York, USA
| | - Kristen M Williams
- 3 Division of Pediatric Endocrinology, Columbia University Medical Center, New York, New York, USA
| | - Sharon Oberfield
- 3 Division of Pediatric Endocrinology, Columbia University Medical Center, New York, New York, USA
| | - Ilene Fennoy
- 3 Division of Pediatric Endocrinology, Columbia University Medical Center, New York, New York, USA
| |
Collapse
|
23
|
Xing YX, Yang L, Kuang HY, Gao XY, Liu HL. Function of obestatin in the digestive system. Nutrition 2017; 34:21-28. [DOI: 10.1016/j.nut.2016.08.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2015] [Revised: 04/18/2016] [Accepted: 08/29/2016] [Indexed: 02/07/2023]
|
24
|
SILVA DAYANEM, MARTINS JOSÉL, FLORENTINO IZIARAF, OLIVEIRA DANILLOR, FAJEMIROYE JAMESO, TRESNVENZOL LEONICEM, PAULA JOSÉR, COSTA ELSONA. The gastroprotective effect of Memora nodosa roots against experimental gastric ulcer in mice. ACTA ACUST UNITED AC 2016; 88:1819-1828. [DOI: 10.1590/0001-3765201620150716] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 01/06/2016] [Indexed: 01/27/2023]
Abstract
ABSTRACT Memora nodosa is popularly known as "caroba" and widely found in the Cerrado regions of Brazil. In traditional medicine, the leaves and stems are used for the healing of external ulcer and the roots for abdominal pain. This study investigated the effect of ethanolic roots extract of Memora nodosa (EMN) on the gastric mucosa of mice. In the indomethacin induced gastric ulcer model, the treatments of the animals with EMN at doses of 100, 300 and 1000 mg/kg, p.o., markedly reduced the index of lesions. In the gastric ulcer models induced by ethanol and cold restraint-stress the previous treatment with EMN at dose of 300 mg/kg showed 69% and 43% of protection, respectively. Seven days after food-restriction, the animals treated with EMN (300 mg/kg p.o.) showed reduction in the index of lesion by 65% as compared to control group. The intraduodenal administration of EMN (300 mg/kg) did not alter the gastric acid secretion parameters. The treatment with EMN (300 mg/kg p.o.) did not alter glutathione levels (GSH), but showed an increase of adhered gastric mucus as compared to the control group with lesion. These results showed that EMN has gastroprotective activity probably due with an increase of adhered gastric mucus.
Collapse
|
25
|
Du GM, Wu JG, Luo BP, Hu ZH, Li LA, Liu MJ. RNAi-mediated Ghrelin affects gastric H(+)-K(+)-ATPase activity and expression of GOAT-Ghrelin system in vitro. Gen Comp Endocrinol 2016; 228:48-52. [PMID: 26873629 DOI: 10.1016/j.ygcen.2016.02.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 02/05/2016] [Accepted: 02/08/2016] [Indexed: 10/22/2022]
Abstract
Ghrelin has been implicated in the regulation of gastric functional development, and its physiological functions are mediated by Ghrelin-O-acyltransferase (GOAT) which is capable of generating the active form of this polypeptide hormone. However, whether and how ghrelin gene silencing may modify gastric acid secretion and GOAT-Ghrelin system is yet to be explored. The study was performed in gastric mucosal cells from weanling piglets in vitro. We evaluated the effect of ghrelin on gastric acid secretion, gene expression of GOAT and ghrelin as well as ghrelin levels by RNA interference assay. shGhrelin triggered the down-regulation of ghrelin mRNA expression (P<0.05) via an RNAi mechanism, as observed by real-time RT-PCR. In addition, shGhrelin showed reduced total ghrelin production and secretion (P<0.05) using ELISA in vitro. We also detected that GOAT mRNA expression was reduced in shGhrelin group (P<0.05), compared with control groups. In accordance with the GOAT expression, acylated ghrelin production and secretion were reduced in gastric mucosal cells and culture medium (P<0.05). Silencing of ghrelin gene achieved by RNAi-mediation inhibited the activity of H(+)-K(+)-ATPase and pepsin (P<0.05) in gastric mucosal cells. These results indicated that RNAi of Ghrelin gene inhibited the gastric acid secretion with decreased GOAT mRNA and acylated Ghrelin in gastric mucosal cells.
Collapse
Affiliation(s)
- Gai M Du
- Department of Animal Science and Technology, Jinling Technology Institution, Nanjing 210038, PR China
| | - Jie G Wu
- Department of Animal Science and Technology, Jinling Technology Institution, Nanjing 210038, PR China
| | - Bi P Luo
- Department of Animal Science and Technology, Jinling Technology Institution, Nanjing 210038, PR China
| | - Zhi H Hu
- Department of Animal Science and Technology, Jinling Technology Institution, Nanjing 210038, PR China
| | - Liu A Li
- Department of Animal Science, Tianjin Agricultural University, Tianjin 300384, PR China
| | - Mao J Liu
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bioproducts, Nanjing 210014, PR China.
| |
Collapse
|
26
|
Chen LL, Bu P. Brain gut peptide levels in gastroesophageal reflux disease patients with different TCM syndrome types. Shijie Huaren Xiaohua Zazhi 2015; 23:5029-5034. [DOI: 10.11569/wcjd.v23.i31.5029] [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] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the relationship between gastroesophageal reflux disease (GERD) and the changes of brain gut peptides and the relationship between the changes of brain gut peptides and TCM syndrome types.
METHODS: One hundred and seventy-eight GERD patients were included, and they were divided into five groups based on syndrome types: stagnation of the liver and stomach, Qi stagnation and phlegm blockade, phlegm stagnation and blood stasis, Qi deficiency, and Qi stagnation and blood stasis. Plasma levels of brain gut peptides including 5-hydroxytryptamine (5-HT), somatostatin (SS), vasoactive intestinal peptide (VIP), endothelin (ET), and motilin (MTL) were determined.
RESULTS: Of 178 patients with GERD, the incidence of stagnation of the liver and stomach was significantly higher in patients with reflux esophagitis (RE) than in those with nonerosive reflux disease (NERD) (P < 0.05), and the incidences of phlegm stagnation and blood stasis and Qi deficiency were significantly higher in the NERD group than in the RE group (P < 0.05). GERD patients had abnormal levels of multiple brain gut peptides. Plasma levels of VIP in both patients with RE and those with NERD were significantly higher than that in the control group (P < 0.05). Plasma VIP levels in patients were related with MTL levels and TCM syndrome types; plasma VIP levels were significantly higher in patients with stagnation of the liver and stomach than in those with Qi deficiency (P < 0.05), and in patients with Qi stagnation and blood stasis than in those with phlegm stagnation and blood stasis, Qi deficiency, and Qi stagnation and blood stasis (P < 0.05).
CONCLUSION: Plasma VIP and MTL may be involved in the occurrence and development of GERD. Stagnation of the liver and stomach is more common in GERD. Plasma VIP and MTL levels are different from traditional Chinese medicine syndrome.
Collapse
|
27
|
Li H, He T, Xu Q, Li Z, Liu Y, Li F, Yang BF, Liu CZ. Acupuncture and regulation of gastrointestinal function. World J Gastroenterol 2015; 21:8304-8313. [PMID: 26217082 PMCID: PMC4507100 DOI: 10.3748/wjg.v21.i27.8304] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 03/26/2015] [Accepted: 05/04/2015] [Indexed: 02/06/2023] Open
Abstract
In China, acupuncture has been considered an effective method for treating gastrointestinal (GI) dysfunction diseases for thousands of years. In fact, acupuncture has gained progressive acceptance from both practitioners and patients worldwide. However, the therapeutic effects and underlying mechanisms in treating GI dysfunction have not yet been established due to a lack of systematic and comprehensive review articles. Therefore, the aim of this review is to discuss the efficacy of acupuncture as a treatment for GI dysfunction and the associated underlying mechanisms. A search of PubMed was conducted for articles that were published over the past 10 years using the terms “acupuncture”, “gastrointestine”, and other relevant keywords. In the following review, we describe the effect and underlying mechanisms of acupuncture on GI function from the perspectives of GI motility, visceral sensitivity, the GI barrier, and the brain-gut axis. The dual regulatory effects of acupuncture may manifest by promoting gastric peristalsis in subjects with low initial gastric motility, and suppressing peristalsis in subjects with active initial motility. In addition, the regulation of acupuncture on gastric motility may be intensity-dependent. Our findings suggest that further studies are needed to investigate the effects and more systematic mechanisms in treating GI dysfunction, and to promote the application of acupuncture for the treatment of GI diseases.
Collapse
|
28
|
Mace OJ, Tehan B, Marshall F. Pharmacology and physiology of gastrointestinal enteroendocrine cells. Pharmacol Res Perspect 2015. [PMID: 26213627 PMCID: PMC4506687 DOI: 10.1002/prp2.155] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Gastrointestinal (GI) polypeptides are secreted from enteroendocrine cells (EECs). Recent technical advances and the identification of endogenous and synthetic ligands have enabled exploration of the pharmacology and physiology of EECs. Enteroendocrine signaling pathways stimulating hormone secretion involve multiple nutrient transporters and G protein-coupled receptors (GPCRs), which are activated simultaneously under prevailing nutrient conditions in the intestine following a meal. The majority of studies investigate hormone secretion from EECs in response to single ligands and although the mechanisms behind how individual signaling pathways generate a hormonal output have been well characterized, our understanding of how these signaling pathways converge to generate a single hormone secretory response is still in its infancy. However, a picture is beginning to emerge of how nutrients and full, partial, or allosteric GPCR ligands differentially regulate the enteroendocrine system and its interaction with the enteric and central nervous system. So far, activation of multiple pathways underlies drug discovery efforts to harness the therapeutic potential of the enteroendocrine system to mimic the phenotypic changes observed in patients who have undergone Roux-en-Y gastric surgery. Typically obese patients exhibit ∼30% weight loss and greater than 80% of obese diabetics show remission of diabetes. Targeting combinations of enteroendocrine signaling pathways that work synergistically may manifest with significant, differentiated EEC secretory efficacy. Furthermore, allosteric modulators with their increased selectivity, self-limiting activity, and structural novelty may translate into more promising enteroendocrine drugs. Together with the potential to bias enteroendocrine GPCR signaling and/or to activate multiple divergent signaling pathways highlights the considerable range of therapeutic possibilities available. Here, we review the pharmacology and physiology of the EEC system.
Collapse
Affiliation(s)
- O J Mace
- Heptares Therapeutics Ltd BioPark, Broadwater Road, Welwyn Garden City, AL7 3AX, United Kingdom
| | - B Tehan
- Heptares Therapeutics Ltd BioPark, Broadwater Road, Welwyn Garden City, AL7 3AX, United Kingdom
| | - F Marshall
- Heptares Therapeutics Ltd BioPark, Broadwater Road, Welwyn Garden City, AL7 3AX, United Kingdom
| |
Collapse
|