1
|
Kazemi S, Hashem R, Stommel M, Cheng LK, Xu W. Biomimetic Closed-Loop Control of a Novel Soft Gastric Simulator Toward Emulating Antral Contraction Waves. Soft Robot 2024; 11:684-697. [PMID: 38252793 DOI: 10.1089/soro.2023.0097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024] Open
Abstract
Soft gastric simulators are in vitro biomimetic modules that can reproduce the antral contraction waves (ACWs). Along with providing information concerning stomach contents, stomach simulators enable experts to evaluate the digestion process of foods and drugs. Traditionally, open-loop control approaches were implemented on stomach simulators to produce ACWs. Constructing a closed-loop control system is essential to improve the simulator's ability to imitate ACWs in additional scenarios and avoid constant tuning. Closed-loop control can enhance stomach simulators in accuracy, responding to various food and drug contents, timing, and unknown disturbances. In this article, a new generation of anatomically realistic soft pneumatic gastric simulators is designed and fabricated. The presented simulator represents the antrum, the lower portion of the stomach where ACWs occur. It is equipped with a real-time feedback system to implement diverse closed-loop controllers on demand. All the details of the physical design, fabrication, and assembly process are discussed. Also, the measures taken for the mechatronics design and sensory system are highlighted in this article. Through several implementation algorithms and techniques, three closed-loop controllers, including model-based and model-free schemes are designed and successfully applied on the presented simulator to imitate ACWs. All the experimental outcomes are carefully analyzed and compared against the biological counterparts. It is demonstrated that the presented simulator can serve as a reliable tool and method to scrutinize digestion and promote novel technologies around the human stomach and the digestion process. This research methodology can also be utilized to develop other biomimetic and bioinspired applications.
Collapse
Affiliation(s)
- Shahab Kazemi
- Department of Mechanical and Mechatronics Engineering, The University of Auckland, Auckland, New Zealand
| | - Ryman Hashem
- Department of Medical Physics and Bioengineering, University College London, London, England
| | - Martin Stommel
- Department of Electrical and Electronic Engineering, Auckland University of Technology, Auckland, New Zealand
| | - Leo K Cheng
- Auckland Bioengineering Institute, The University of Auckland, Auckland, New Zealand
| | - Weiliang Xu
- Department of Mechanical and Mechatronics Engineering, The University of Auckland, Auckland, New Zealand
| |
Collapse
|
2
|
Koebbe LL, Hess T, Giel AS, Bigge J, Gehlen J, Schueller V, Geppert M, Dumoulin FL, Heller J, Schepke M, Plaßmann D, Vieth M, Venerito M, Schumacher J, Maj C. The genetic regulation of the gastric transcriptome is associated with metabolic and obesity-related traits and diseases. Physiol Genomics 2024; 56:384-396. [PMID: 38406838 PMCID: PMC11368570 DOI: 10.1152/physiolgenomics.00120.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 01/26/2024] [Accepted: 02/21/2024] [Indexed: 02/27/2024] Open
Abstract
Tissue-specific gene expression and gene regulation lead to a better understanding of tissue-specific physiology and pathophysiology. We analyzed the transcriptome and genetic regulatory profiles of two distinct gastric sites, corpus and antrum, to identify tissue-specific gene expression and its regulation. Gastric corpus and antrum mucosa biopsies were collected during routine gastroscopies from up to 431 healthy individuals. We obtained genotype and transcriptome data and performed transcriptome profiling and expression quantitative trait locus (eQTL) studies. We further used data from genome-wide association studies (GWAS) of various diseases and traits to partition their heritability and to perform transcriptome-wide association studies (TWAS). The transcriptome data from corpus and antral mucosa highlights the heterogeneity of gene expression in the stomach. We identified enriched pathways revealing distinct and common physiological processes in gastric corpus and antrum. Furthermore, we found an enrichment of the single nucleotide polymorphism (SNP)-based heritability of metabolic, obesity-related, and cardiovascular traits and diseases by considering corpus- and antrum-specifically expressed genes. Particularly, we could prioritize gastric-specific candidate genes for multiple metabolic traits, like NQO1 which is involved in glucose metabolism, MUC1 which contributes to purine and protein metabolism or RAB27B being a regulator of weight and body composition. Our findings show that gastric corpus and antrum vary in their transcriptome and genetic regulatory profiles indicating physiological differences which are mostly related to digestion and epithelial protection. Moreover, our findings demonstrate that the genetic regulation of the gastric transcriptome is linked to biological mechanisms associated with metabolic, obesity-related, and cardiovascular traits and diseases. NEW & NOTEWORTHY We analyzed the transcriptomes and genetic regulatory profiles of gastric corpus and for the first time also of antrum mucosa in 431 healthy individuals. Through tissue-specific gene expression and eQTL analyses, we uncovered unique and common physiological processes across both primary gastric sites. Notably, our findings reveal that stomach-specific eQTLs are enriched in loci associated with metabolic traits and diseases, highlighting the pivotal role of gene expression regulation in gastric physiology and potential pathophysiology.
Collapse
Affiliation(s)
- Laura L Koebbe
- Center for Human Genetics, University of Marburg, Marburg, Germany
| | - Timo Hess
- Center for Human Genetics, University of Marburg, Marburg, Germany
| | - Ann-Sophie Giel
- Center for Human Genetics, University of Marburg, Marburg, Germany
| | - Jessica Bigge
- Center for Human Genetics, University of Marburg, Marburg, Germany
| | - Jan Gehlen
- Center for Human Genetics, University of Marburg, Marburg, Germany
| | | | | | | | - Joerg Heller
- Marienhaus Hospital Ahrweiler, Ahrweiler, Germany
| | - Michael Schepke
- Department of Gastroenterology, Helios Hospital Siegburg, Siegburg, Germany
| | | | - Michael Vieth
- Institute for Pathology, Klinikum Bayreuth, University of Erlangen-Nuremberg, Bayreuth, Germany
| | - Marino Venerito
- Department of Gastroenterology, Hepatology and Infectious Diseases, Otto-von-Guericke University Hospital, Magdeburg, Germany
| | | | - Carlo Maj
- Center for Human Genetics, University of Marburg, Marburg, Germany
| |
Collapse
|
3
|
Amekyeh H, Sabra R, Billa N. A Window for Enhanced Oral Delivery of Therapeutics via Lipid Nanoparticles. Drug Des Devel Ther 2024; 18:613-630. [PMID: 38476206 PMCID: PMC10927375 DOI: 10.2147/dddt.s439975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 11/25/2023] [Indexed: 03/14/2024] Open
Abstract
Oral administration of dosage forms is convenient and beneficial in several respects. Lipid nanoparticulate dosage forms have emerged as a useful carrier system in deploying low solubility drugs systemically, particularly class II, III, and IV drugs of the Biopharmaceutics Classification System. Like other nanoparticulate delivery systems, their low size-to-volume ratio facilitates uptake by phagocytosis. Lipid nanoparticles also provide scope for high drug loading and extended-release capability, ensuring diminished systemic side effects and improved pharmacokinetics. However, rapid gastrointestinal (GI) clearance of particulate delivery systems impedes efficient uptake across the mucosa. Mucoadhesion of dosage forms to the GI mucosa results in longer transit times due to interactions between the former and mucus. Delayed transit times facilitate transfer of the dosage form across the mucosa. In this regard, a balance between mucoadhesion and mucopenetration guarantees optimal systemic transfer. Furthermore, the interplay between GI anatomy and physiology is key to ensuring efficient systemic uptake. This review captures salient anatomical and physiological features of the GI tract and how these can be exploited for maximal systemic delivery of lipid nanoparticles. Materials used to impart mucoadhesion and examples of successful mucoadhesive lipid nanoformulations are highlighted in this review.
Collapse
Affiliation(s)
- Hilda Amekyeh
- Department of Pharmaceutics, School of Pharmacy, University of Health and Allied Sciences, Ho, Ghana
| | - Rayan Sabra
- Department of Pharmaceutical Sciences, University of Connecticut, Storrs, CT, USA
| | | |
Collapse
|
4
|
Li JJ, Boivin Z, Bhalodkar S, Liu R. Point of Care Abdominal Ultrasound. Semin Ultrasound CT MR 2024; 45:11-21. [PMID: 38056783 DOI: 10.1053/j.sult.2023.12.003] [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: 12/08/2023]
Abstract
Abdominal pain is a common emergency department complaint, and point-of-care ultrasound (POCUS) of the abdomen is increasingly being utilized to evaluate clinical manifestations. It aids in accurate diagnoses and assists in procedures, particularly in emergency and critical care settings. Imaging is often required to confirm the etiology of abdominal pain. POCUS provides the benefit of avoiding radiation exposure and enables quicker diagnosis compared to computed tomography scans. There is growing evidence of the diagnostic accuracy for numerous abdominal POCUS applications, including appendicitis, intussusception, diverticulitis, gastric ultrasound and contrast-enhanced ultrasound.
Collapse
Affiliation(s)
- Jia J Li
- Yale New-Haven Hospital, New Haven, CT.
| | | | | | | |
Collapse
|
5
|
Choi HS, Hwang JH. Endoscopic Resection of Early Luminal Cancer. Gastrointest Endosc Clin N Am 2024; 34:51-78. [PMID: 37973231 DOI: 10.1016/j.giec.2023.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
Gastrointestinal cancers can have severe consequences if diagnosed at a late stage but can be cured when detected and resected at an early stage. In recent years, the significance of endoscopic screening for gastrointestinal cancers has been established, leading to the identification of early-stage cancers and precancerous lesions. Consequently, endoscopic removal of gastrointestinal tumors has emerged as an effective means of cancer treatment and prevention. This article delves into the indications, techniques, and safety measures associated with endoscopic resection of early-stage luminal cancer within the gastrointestinal tract.
Collapse
Affiliation(s)
- Hyuk Soon Choi
- Korea University College of Medicine, Stanford University Medicine, Korea University Anam Hospital, Goryeodae-ro 73, Seongbuk-gu, Seoul 02841, South Korea
| | - Joo Ha Hwang
- Division of Gastroenterology and Hepatology, Department of Medicine, Stanford University Medicine, Stanford Hospital, 300 Pasteur Drive, H0268, MC: 5244, Stanford, CA 94305, USA.
| |
Collapse
|
6
|
Chen C, Beloqui A, Xu Y. Oral nanomedicine biointeractions in the gastrointestinal tract in health and disease. Adv Drug Deliv Rev 2023; 203:115117. [PMID: 37898337 DOI: 10.1016/j.addr.2023.115117] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 10/03/2023] [Accepted: 10/21/2023] [Indexed: 10/30/2023]
Abstract
Oral administration is the preferred route of administration based on the convenience for and compliance of the patient. Oral nanomedicines have been developed to overcome the limitations of free drugs and overcome gastrointestinal (GI) barriers, which are heterogeneous across healthy and diseased populations. This review aims to provide a comprehensive overview and comparison of the oral nanomedicine biointeractions in the gastrointestinal tract (GIT) in health and disease (GI and extra-GI diseases) and highlight emerging strategies that exploit these differences for oral nanomedicine-based treatment. We introduce the key GI barriers related to oral delivery and summarize their pathological changes in various diseases. We discuss nanomedicine biointeractions in the GIT in health by describing the general biointeractions based on the type of oral nanomedicine and advanced biointeractions facilitated by advanced strategies applied in this field. We then discuss nanomedicine biointeractions in different diseases and explore how pathological characteristics have been harnessed to advance the development of oral nanomedicine.
Collapse
Affiliation(s)
- Cheng Chen
- UCLouvain, Université catholique de Louvain, Louvain Drug Research Institute, Advanced Drug Delivery and Biomaterials, 1200 Brussels, Belgium
| | - Ana Beloqui
- UCLouvain, Université catholique de Louvain, Louvain Drug Research Institute, Advanced Drug Delivery and Biomaterials, 1200 Brussels, Belgium; WEL Research Institute, avenue Pasteur, 6, 1300 Wavre, Belgium.
| | - Yining Xu
- Department of Pharmacy, Institute of Metabolic Diseases and Pharmacotherapy, West China Hospital, Sichuan University, Chengdu 610041, China; Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Department of Clinical Pharmacy and Pharmacy Administration, West China School of Pharmacy, Sichuan University, Chengdu 610041, China.
| |
Collapse
|
7
|
Shigeta Y, Saleh T, Benedetti G, Caciolli L, Chang J, Zambaiti E, Wu L, Khalaf S, Song W, Pellegata AF, Giobbe GG, De Coppi P. Stomach engineering: region-specific characterization of the decellularized porcine stomach. Pediatr Surg Int 2023; 40:13. [PMID: 38032517 PMCID: PMC10689559 DOI: 10.1007/s00383-023-05591-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/01/2023] [Indexed: 12/01/2023]
Abstract
PURPOSE Patients affected by microgastria, severe gastroesophageal reflux, or those who have undergone subtotal gastrectomy, have commonly described reporting dumping syndromes or other symptoms that seriously impair the quality of their life. Gastric tissue engineering may offer an alternative approach to treating these pathologies. Decellularization protocols have great potential to generate novel biomaterials for large gastric defect repair. There is an urgency to define more reliable protocols to foster clinical applications of tissue-engineered decellularized gastric grafts. METHODS In this work, we investigated the biochemical and mechanical properties of decellularized porcine stomach tissue compared to its native counterpart. Histological and immunofluorescence analyses were performed to screen the quality of decellularized samples. Quantitative analysis was also performed to assess extracellular matrix composition. At last, we investigated the mechanical properties and cytocompatibility of the decellularized tissue compared to the native. RESULTS The optimized decellularization protocol produced efficient cell removal, highlighted in the absence of native cellular nuclei. Decellularized scaffolds preserved collagen and elastin contents, with partial loss of sulfated glycosaminoglycans. Decellularized gastric tissue revealed increased elastic modulus and strain at break during mechanical tensile tests, while ultimate tensile strength was significantly reduced. HepG2 cells were seeded on the ECM, revealing matrix cytocompatibility and the ability to support cell proliferation. CONCLUSION Our work reports the successful generation of acellular porcine gastric tissue able to support cell viability and proliferation of human cells.
Collapse
Affiliation(s)
- Yusuke Shigeta
- Stem Cells and Regenerative Medicine Section, Great Ormond Street Institute of Child Health, University College London, London, UK
- Department of Pediatric General and Urogenital Surgery, Juntendo University, Tokyo, Japan
| | - Tarek Saleh
- Stem Cells and Regenerative Medicine Section, Great Ormond Street Institute of Child Health, University College London, London, UK
| | - Giada Benedetti
- Stem Cells and Regenerative Medicine Section, Great Ormond Street Institute of Child Health, University College London, London, UK
| | - Lorenzo Caciolli
- Stem Cells and Regenerative Medicine Section, Great Ormond Street Institute of Child Health, University College London, London, UK
- Wellcome / EPSRC Centre for Interventional and Surgical Sciences (WEISS), University College London, London, UK
| | - Jinke Chang
- Centre for Biomaterials in Surgical Reconstruction and Regeneration, Division of Surgery and Interventional Science, University College London, London, UK
| | - Elisa Zambaiti
- Paediatric Surgery, Ospedale Infantile Regina Margherita, Turin, Italy
| | - Lei Wu
- Centre for Biomaterials in Surgical Reconstruction and Regeneration, Division of Surgery and Interventional Science, University College London, London, UK
| | - Sahira Khalaf
- Stem Cells and Regenerative Medicine Section, Great Ormond Street Institute of Child Health, University College London, London, UK
| | - Wulei Song
- Centre for Biomaterials in Surgical Reconstruction and Regeneration, Division of Surgery and Interventional Science, University College London, London, UK
| | - Alessandro Filippo Pellegata
- Laboratory of Biological Structure Mechanics (LaBS), Department of Chemistry, Politecnico di Milano, Milan, Italy
| | - Giovanni Giuseppe Giobbe
- Stem Cells and Regenerative Medicine Section, Great Ormond Street Institute of Child Health, University College London, London, UK.
| | - Paolo De Coppi
- Stem Cells and Regenerative Medicine Section, Great Ormond Street Institute of Child Health, University College London, London, UK.
- Department of Specialist Neonatal and Paediatric Surgery, Great Ormond Street Hospital, London, UK.
| |
Collapse
|
8
|
Nadia J, Singh H, Bornhorst GM. Evaluation of the performance of the human gastric simulator using durum wheat-based foods of contrasting food structure. Food Funct 2023. [PMID: 37427445 DOI: 10.1039/d3fo00740e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/11/2023]
Abstract
The selection of gastric digestion parameters in food digestion studies using in vitro models is critical to properly represent structural changes in the stomach. This study aimed to evaluate the performance of digestion in the human gastric simulator (HGS) using generalized in vitro gastric digestion parameters (secretion rate of 4.1 mL min-1, gastric emptying rate of 5.68 g min-1) that were derived from a previous in vivo study using six starch-rich foods. Two of the six foods used in the in vivo study (cooked durum wheat porridge/semolina and pasta) were digested in the HGS for up to 240 min, then the properties of the emptied and remaining digesta were measured. The properties of the in vitro remaining digesta were compared to those measured in vivo (growing pig stomach). The trends in the gastric breakdown rate and mechanisms, dry matter emptying kinetics, and starch hydrolysis of pasta and semolina were similar to those of in vivo. Gastric breakdown and dilution kinetics in vitro and in vivo were well-related but did not have a 1 : 1 correlation, whereas gastric acidification kinetics in the HGS deviated from that observed in vivo. The results suggest that generalized digestion parameters could be used to predict the effect of food structure on in vivo gastric breakdown and emptying, but care should be taken in interpretation of results, as the gastric acidification process was different from what was observed in vivo. This information will help refine in vitro digestion model parameters to provide more physiologically-relevant data in future studies.
Collapse
Affiliation(s)
- Joanna Nadia
- Riddet Institute, Massey University, Private Bag 11222, Palmerston North, New Zealand.
| | - Harjinder Singh
- Riddet Institute, Massey University, Private Bag 11222, Palmerston North, New Zealand.
| | - Gail M Bornhorst
- Riddet Institute, Massey University, Private Bag 11222, Palmerston North, New Zealand.
- Department of Biological and Agricultural Engineering, University of California, Davis, CA 95618, USA
| |
Collapse
|
9
|
Caccavo D, Iannone M, Barba AA, Lamberti G. Impact of drug release in USP II and in-vitro stomach on pharmacokinetic: The case study of immediate-release carbamazepine tablets. Chem Eng Sci 2023. [DOI: 10.1016/j.ces.2022.118371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
10
|
Lee J, Kim MH, Kim H. Anti-Oxidant and Anti-Inflammatory Effects of Astaxanthin on Gastrointestinal Diseases. Int J Mol Sci 2022; 23:ijms232415471. [PMID: 36555112 PMCID: PMC9779521 DOI: 10.3390/ijms232415471] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 12/02/2022] [Accepted: 12/05/2022] [Indexed: 12/12/2022] Open
Abstract
A moderate amount of reactive oxygen species (ROS) is produced under normal conditions, where they play an important role in cell signaling and are involved in many aspects of the immune response to pathogens. On the other hand, the excessive production of ROS destructs macromolecules, cell membranes, and DNA, and activates pro-inflammatory signaling pathways, which may lead to various pathologic conditions. Gastrointestinal (GI) mucosa is constantly exposed to ROS due to the presence of bacteria and other infectious pathogens in food, as well as alcohol consumption, smoking, and the use of non-steroidal anti-inflammatory drugs (NSAID). Prolonged excessive oxidative stress and inflammation are two major risk factors for GI disorders such as ulcers and cancers. Bioactive food compounds with potent anti-oxidant and anti-inflammatory activity have been tested in experimental GI disease models to evaluate their therapeutic potential. Astaxanthin (AST) is a fat-soluble xanthophyll carotenoid that is naturally present in algae, yeast, salmon, shrimp, and krill. It has been shown that AST exhibits protective effects against GI diseases via multiple mechanisms. Residing at the surface and inside of cell membranes, AST directly neutralizes ROS and lipid peroxyl radicals, enhances the activity of anti-oxidant enzymes, and suppresses pro-inflammatory transcription factors and cytokines. In addition, AST has been shown to inhibit cancer cell growth and metastasis via modulating cell proliferation-related pathways, apoptosis, and autophagy. Considering the potential benefits of AST in GI diseases, this review paper aims to summarize recent advances in AST research, focusing on its anti-oxidant and anti-inflammatory effects against gastric and intestinal ulcers and cancers.
Collapse
Affiliation(s)
- Jaeeun Lee
- Department of Food and Nutrition, BK21 FOUR, College of Human Ecology, Yonsei University, Seoul 03722, Republic of Korea
| | - Min-Hyun Kim
- College of Health Solutions, Arizona State University, Phoenix, AZ 85004, USA
- Correspondence: (M.-H.K.); (H.K.); Tel.: +1-602-496-4163 (M.-H.K.); +82-2-2123-3125 (H.K.)
| | - Hyeyoung Kim
- Department of Food and Nutrition, BK21 FOUR, College of Human Ecology, Yonsei University, Seoul 03722, Republic of Korea
- Correspondence: (M.-H.K.); (H.K.); Tel.: +1-602-496-4163 (M.-H.K.); +82-2-2123-3125 (H.K.)
| |
Collapse
|
11
|
Wang X, Wang Q, Hu Y, Yin F, Liu X, Zhou D. Gastrointestinal Digestion and Microbial Hydrolysis of Alkyl Gallates: Potential Sustained Release of Gallic Acid. Foods 2022; 11:foods11233936. [PMID: 36496745 PMCID: PMC9737867 DOI: 10.3390/foods11233936] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 12/01/2022] [Accepted: 12/05/2022] [Indexed: 12/12/2022] Open
Abstract
Phenolipids such as alkyl gallates (A-GAs) have been approved by the food industry as non-toxic antioxidant additives, which are also regarded as an emerging source of functional food ingredients. However, comprehensive understanding of their digestive absorption is needed. Thus, the models of live mice and anaerobic fermentation were used to clarify the distribution and microbial hydrolysis characteristics of A-GAs in the gastrointestinal tract. HPLC-UV results demonstrated that A-GAs could be hydrolyzed by intestinal lipases and gut microorganisms including Lactobacillus to produce free gallic acid (GA). Through regulating the chain length of the lipid part in A-GAs, the sustained and controllable release of the GA can be easily achieved. Furthermore, A-GAs were also able to reach the colon and the cecum, which would lead to potential gastrointestinal protective effects. Therefore, A-GAs may be applied as possible ingredient for functional foods.
Collapse
Affiliation(s)
- Xinmiao Wang
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China
| | - Qian Wang
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China
| | - Yuanyuan Hu
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
- Development of Food Industry, Shenzhen University, Shenzhen 518060, China
| | - Fawen Yin
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China
- National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, China
- Correspondence: ; Tel.: +86-0411-86323453
| | - Xiaoyang Liu
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China
- National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, China
| | - Dayong Zhou
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China
- National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, China
| |
Collapse
|
12
|
Biancani B, Galosi L, Tambella AM, Berardi S, Biagini L, Mari S, Rossi G. Comparative Study of the Gastric Mucosa of Risso's Dolphin ( Grampus griseus) and Bottlenose Dolphin ( Tursiops truncatus): A Key to Manage the Diet in Captive Conditions. Vet Sci 2022; 9:571. [PMID: 36288184 PMCID: PMC9609225 DOI: 10.3390/vetsci9100571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/07/2022] [Accepted: 10/14/2022] [Indexed: 11/05/2022] Open
Abstract
To histologically evaluate the gastric compartments of Risso’s (Grampus griseus) and bottlenose dolphins (Tursiops truncatus) and provide suggestions for the diet of Risso’s dolphins in captivity, we examined 12 stomachs from both species. While slight differences in keratinization were observed in the forestomach, significant differences came to light in the second stomach’s mucosa. At this level, in Risso’s dolphin, the principal cells are markedly reduced in size and located externally to the parietal cells, not interspersed between them, compared to bottlenose dolphins; differences were also observed in the structure and concentration of the parietal and principal cells of the gastric body glands (p < 0.0001). The quantitative results of G- and D-cell counts in the gastric mucosa show a clear difference, with a higher concentration of G cells in the mucosa of Risso’s dolphin (t = 7.334; p < 0.0001) and a higher level of D cells in bottlenose dolphin mucosa (t = 3.123; p = 0.0049). These results suggest that parietal cells undergo greater stimulation by gastrin produced by G cells, with greater acid secretion in G. griseus. Further studies are needed to understand whether an inappropriate diet could lead to severe clinical signs due to gastric acidity in Risso’s dolphin.
Collapse
Affiliation(s)
| | - Livio Galosi
- School of Biosciences and Veterinary Medicine, University of Camerino, 62032 Camerino, Italy
| | | | | | | | | | | |
Collapse
|
13
|
Pei Y, Fan Z, Song Y, Chen C, Mu Y, Li B, Feng Z, Li H, Li K. Viscera Characteristics of MSTN-Edited Heterozygous Pigs. Front Genet 2022; 13:764965. [PMID: 35299949 PMCID: PMC8921262 DOI: 10.3389/fgene.2022.764965] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 02/08/2022] [Indexed: 11/29/2022] Open
Abstract
Myostatin (MSTN) is a protein that negatively regulates growth of skeletal muscle, and inactivation of MSTN improves the mass of skeletal muscle. Our previous work found that MSTN+/− pigs have higher muscle depth and lower fat depth compared to wild type without any developmental problems. Therefore, MSTN-edited pigs are most likely to appear as heterozygotes in the potential future market, but the characteristics of organs in digestive and reproductive system of pigs with MSTN gene editing remains unclear. Here, we investigated the histological of the organs in the digestive system and reproductive system in MSTN gene heterozygotes at adult stages. The length of intestine was further compared between adult heterozygous and wild type pigs. We found no significant differences in histomorphology of organs, including heart, duodenum, jejunum, ileum, cecum, colon, testis, epididymis, ovaries, oviducts and uterus, between individuals from two genotypes. Moreover, there was no significant difference in the average length of intestine in adult pigs. Our data provide a reference for further clarifying the applications of MSTN gene edited pigs.
Collapse
Affiliation(s)
- Yangli Pei
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, Key Laboratory of Animal Molecular Design and Precise Breeding of Guangdong Higher Education Institutes, School of Life Science and Engineering, Foshan University, Foshan, China
| | - Ziyao Fan
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
- Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, China
| | - Yuxin Song
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, Key Laboratory of Animal Molecular Design and Precise Breeding of Guangdong Higher Education Institutes, School of Life Science and Engineering, Foshan University, Foshan, China
| | - Chujie Chen
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, Key Laboratory of Animal Molecular Design and Precise Breeding of Guangdong Higher Education Institutes, School of Life Science and Engineering, Foshan University, Foshan, China
| | - Yulian Mu
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Bugao Li
- College of Animal Science, Shanxi Agricultural University, Taigu, China
| | - Zheng Feng
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, Key Laboratory of Animal Molecular Design and Precise Breeding of Guangdong Higher Education Institutes, School of Life Science and Engineering, Foshan University, Foshan, China
| | - Hua Li
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, Key Laboratory of Animal Molecular Design and Precise Breeding of Guangdong Higher Education Institutes, School of Life Science and Engineering, Foshan University, Foshan, China
| | - Kui Li
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, China
- *Correspondence: Kui Li,
| |
Collapse
|
14
|
Wollmer E, Ungell AL, Nicolas JM, Klein S. Review of paediatric gastrointestinal physiology relevant to the absorption of orally administered medicines. Adv Drug Deliv Rev 2022; 181:114084. [PMID: 34929252 DOI: 10.1016/j.addr.2021.114084] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 11/13/2021] [Accepted: 12/13/2021] [Indexed: 12/11/2022]
Abstract
Despite much progress in regulations to improve paediatric drug development, there remains a significant need to develop better medications for children. For the design of oral dosage forms, a detailed understanding of the specific gastrointestinal (GI) conditions in children of different age categories and how they differ from GI conditions in adults is essential. Several review articles have been published addressing the ontogeny of GI characteristics, including luminal conditions in the GI tract of children. However, the data reported in most of these reviews are of limited quality because (1) information was cited from very old publications and sometimes low quality sources, (2) data gaps in the original data were filled with textbook knowledge, (3) data obtained on healthy and sick children were mixed, (4) average data obtained on groups of patients were mixed with data obtained on individual patients, and (5) results obtained using investigative techniques that may have altered the outcome of the respective studies were considered. Consequently, many of these reviews draw conclusions that may be incorrect. The aim of the present review was to provide a comprehensive and updated overview of the available original data on the ontogeny of GI luminal conditions relevant to oral drug absorption in the paediatric population. To this end, the PubMed and Web of Science metadatabases were searched for appropriate studies that examined age-related conditions in the oral cavity, esophagus, stomach, small intestine, and colon. Maturation was observed for several GI parameters, and corresponding data sets were identified for each paediatric age group. However, it also became clear that the ontogeny of several GI traits in the paediatric population is not yet known. The review article provides a robust and valuable data set for the development of paediatric in vitro and in silico biopharmaceutical tools to support the development of age-appropriate dosage forms. In addition, it provides important information on existing data gaps and should provide impetus for further systematic and well-designed in vivo studies on GI physiology in children of specific age groups in order to close existing knowledge gaps and to sustainably improve oral drug therapy in children.
Collapse
|
15
|
Retnakumar R, Nath AN, Nair GB, Chattopadhyay S. Gastrointestinal microbiome in the context of Helicobacter pylori infection in stomach and gastroduodenal diseases. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2022; 192:53-95. [DOI: 10.1016/bs.pmbts.2022.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
16
|
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
|
17
|
Vrettos NN, Roberts CJ, Zhu Z. Gastroretentive Technologies in Tandem with Controlled-Release Strategies: A Potent Answer to Oral Drug Bioavailability and Patient Compliance Implications. Pharmaceutics 2021; 13:pharmaceutics13101591. [PMID: 34683884 PMCID: PMC8539558 DOI: 10.3390/pharmaceutics13101591] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 09/22/2021] [Accepted: 09/27/2021] [Indexed: 11/24/2022] Open
Abstract
There have been many efforts to improve oral drug bioavailability and therapeutic efficacy and patient compliance. A variety of controlled-release oral delivery systems have been developed to meet these needs. Gastroretentive drug delivery technologies have the potential to achieve retention of the dosage form in the upper gastrointestinal tract (GIT) that can be sufficient to ensure complete solubilisation of the drugs in the stomach fluids, followed by subsequent absorption in the stomach or proximal small intestine. This can be beneficial for drugs that have an “absorption window” or are absorbed to a different extent in various segments of the GIT. Therefore, gastroretentive technologies in tandem with controlled-release strategies could enhance both the therapeutic efficacy of many drugs and improve patient compliance through a reduction in dosing frequency. The paper reviews different gastroretentive drug delivery technologies and controlled-release strategies that can be combined and summarises examples of formulations currently in clinical development and commercially available gastroretentive controlled-release products. The different parameters that need to be considered and monitored during formulation development for these pharmaceutical applications are highlighted.
Collapse
|
18
|
Abstract
Surgery is an essential component of curative-intent treatment strategies for gastric cancer. However, the care of each patient with gastric cancer must be individualized based on patient and tumor characteristics. It is important that all physicians who will be caring for patient with gastric cancer understand the current best practices of surgical management to provide patients with the highest quality of care. This article aims to provide this information while acknowledging areas of surgical management that are still controversial.
Collapse
Affiliation(s)
- Ian Solsky
- Department of Surgery, Montefiore Medical Center, Albert Einstein College of Medicine, 1300 Morris Park Avenue Block Building #112, New York, NY 10461, USA
| | - Haejin In
- Department of Surgery, Montefiore Medical Center, Albert Einstein College of Medicine, 1300 Morris Park Avenue Block Building #112, New York, NY 10461, USA; Department of Surgery, Albert Einstein College of Medicine, New York, NY, USA; Department of Epidemiology and Population Health, Albert Einstein College of Medicine, New York, NY, USA.
| |
Collapse
|
19
|
|
20
|
Vora Z, Goyal A, Sharma R. Radiological Anatomy of Stomach and Duodenum with Clinical Significance. JOURNAL OF GASTROINTESTINAL AND ABDOMINAL RADIOLOGY 2021. [DOI: 10.1055/s-0041-1727579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
AbstractAnatomy is the key to accurate imaging interpretation. It is essential for radiologists to thoroughly understand the normal anatomy and spatial relationships of the stomach and duodenum to accurately localize the site of abnormality. In this article, we describe in detail the gross and applied radiological anatomy of the stomach and duodenum, and the current role of various radiological investigations (including barium studies, endoscopic ultrasonography, computed tomography, and magnetic resonance imaging) in the evaluation of the diseases involving the stomach and duodenum.
Collapse
Affiliation(s)
- Zainab Vora
- Department of Diagnostic and Interventional Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Ankur Goyal
- Department of Diagnostic and Interventional Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Raju Sharma
- Department of Diagnostic and Interventional Radiology, All India Institute of Medical Sciences, New Delhi, India
| |
Collapse
|
21
|
Nadia J, Olenskyj AG, Stroebinger N, Hodgkinson SM, Estevez TG, Subramanian P, Singh H, Singh RP, Bornhorst GM. Tracking physical breakdown of rice- and wheat-based foods with varying structures during gastric digestion and its influence on gastric emptying in a growing pig model. Food Funct 2021; 12:4349-4372. [PMID: 33884384 DOI: 10.1039/d0fo02917c] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
There is currently a limited understanding of the effect of food structure on physical breakdown and gastric emptying of solid starch-based foods during gastric digestion. Moisture uptake, pH, particle size, rheological, and textural properties of six solid starch-based diets from different sources (Durum wheat and high amylose white rice) and of different macrostructures (porridge, native grain, agglomerate/couscous, and noodle) were monitored during 240 min of gastric digestion in a growing pig model. Changes in the physical properties of the gastric digesta were attributed to the influence of gastric secretions and gastric emptying, which were both dependent on the buffering capacity and initial macrostructure of the diets. Differences between the proximal and distal stomach regions were found in the intragastric pH and texture of the gastric digesta. For example, rice couscous, which had the smallest particle size and highest buffering capacity among the rice-based diets, had the shortest gastric emptying half-time and no significant differences between proximal and distal stomach digesta physical properties. Additionally, a relationship between gastric breakdown rate, expressed as gastric softening half-time from texture analysis, and gastric emptying half-time of dry matter was also observed. These findings provide new insights into the breakdown processes of starch-based solid foods in the stomach, which can be beneficial for the development of food structures with controlled rates of breakdown and gastric emptying during digestion.
Collapse
Affiliation(s)
- Joanna Nadia
- School of Food and Advanced Technology, Massey University, Private Bag 11222, Palmerston North, New Zealand
| | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Nadia J, Bronlund J, Singh RP, Singh H, Bornhorst GM. Structural breakdown of starch-based foods during gastric digestion and its link to glycemic response: In vivo and in vitro considerations. Compr Rev Food Sci Food Saf 2021; 20:2660-2698. [PMID: 33884751 DOI: 10.1111/1541-4337.12749] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 02/19/2021] [Accepted: 03/08/2021] [Indexed: 01/10/2023]
Abstract
The digestion of starch-based foods in the small intestine as well as factors affecting their digestibility have been previously investigated and reviewed in detail. Starch digestibility has been studied both in vivo and in vitro, with increasing interest in the use of in vitro models. Although previous in vivo studies have indicated the effect of mastication and gastric digestion on the digestibility of solid starch-based foods, the physical breakdown of starch-based foods prior to small intestinal digestion is often less considered. Moreover, gastric digestion has received little attention in the attempt to understand the digestion of solid starch-based foods in the digestive tract. In this review, the physical breakdown of starch-based foods in the mouth and stomach, the quantification of these breakdown processes, and their links to physiological outcomes, such as gastric emptying and glycemic response, are discussed. In addition, the physical breakdown aspects related to gastric digestion that need to be considered when developing in vitro-in vivo correlation in starch digestion studies are discussed. The discussion demonstrates that physical breakdown prior to small intestinal digestion, especially during gastric digestion, should not be neglected in understanding the digestion of solid starch-based foods.
Collapse
Affiliation(s)
- Joanna Nadia
- School of Food and Advanced Technology, Massey University, Palmerston North, New Zealand.,Riddet Institute, Massey University, Palmerston North, New Zealand
| | - John Bronlund
- School of Food and Advanced Technology, Massey University, Palmerston North, New Zealand.,Riddet Institute, Massey University, Palmerston North, New Zealand
| | - Rajinder Paul Singh
- Riddet Institute, Massey University, Palmerston North, New Zealand.,Department of Biological and Agricultural Engineering, University of California, Davis, Davis, California, USA
| | - Harjinder Singh
- Riddet Institute, Massey University, Palmerston North, New Zealand
| | - Gail M Bornhorst
- Riddet Institute, Massey University, Palmerston North, New Zealand.,Department of Biological and Agricultural Engineering, University of California, Davis, Davis, California, USA
| |
Collapse
|
23
|
Zaffran VD, Gupta S, Sathe SK, Roper MG. Effect of deglycosylation on immunoreactivity and in vitro pepsin digestibility of major cashew (Anacardium occidentale L.) allergen, Ana o 1. J Food Sci 2021; 86:1144-1152. [PMID: 33580498 DOI: 10.1111/1750-3841.15628] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 01/04/2021] [Accepted: 01/10/2021] [Indexed: 11/28/2022]
Abstract
Major cashew allergen, Ana o 1, was purified in its native form from cashew seeds and subjected to enzymatic deglycosylation using PNGase F to assess the potential role of N-glycans in immunoreactivity. Western and dot blotting with pooled human plasma containing anticashew IgE revealed that deglycosylation increased IgE-binding of Ana o 1. Removal of N-glycans may have exposed previously masked Ana o 1 epitopes. Purified glycosylated and deglycosylated Ana o 1 were also subjected to in vitro pepsin digestion at pH 3.0 for 2 hr. Both glycosylated and deglycosylated Ana o 1 remained stable and reactive with IgE antibodies following digestion. PRACTICAL APPLICATION: Understanding the role of glycosylation in Ana o 1 immunoreactivity may provide insight into the potential development of hypoallergenic cashews/cashew products for sensitive individuals in the future.
Collapse
Affiliation(s)
- Valerie D Zaffran
- Department of Chemistry & Biochemistry, Florida State University, 95 Chieftain Way, Tallahassee, FL, 32306, USA
| | - Sahil Gupta
- Department of Nutrition, Food & Exercise Sciences, Florida State University, 120 Convocation Way, Tallahassee, FL, 32306, USA
| | - Shridhar K Sathe
- Department of Nutrition, Food & Exercise Sciences, Florida State University, 120 Convocation Way, Tallahassee, FL, 32306, USA
| | - Michael G Roper
- Department of Chemistry & Biochemistry, Florida State University, 95 Chieftain Way, Tallahassee, FL, 32306, USA
| |
Collapse
|
24
|
Toniolo I, Fontanella CG, Foletto M, Carniel EL. Biomechanical Investigation of the Stomach Following Different Bariatric Surgery Approaches. Bioengineering (Basel) 2020; 7:bioengineering7040159. [PMID: 33317122 PMCID: PMC7764040 DOI: 10.3390/bioengineering7040159] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 12/02/2020] [Accepted: 12/07/2020] [Indexed: 12/15/2022] Open
Abstract
Background: The stomach is a hollow organ of the gastrointestinal tract, on which bariatric surgery (BS) is performed for the treatment of obesity. Even though BS is the most effective treatment for severe obesity, drawbacks and complications are still present because the intervention design is largely based on the surgeon’s expertise and intraoperative decisions. Bioengineering methods can be exploited to develop computational tools for more rational presurgical design and planning of the intervention. Methods: A computational mechanical model of the stomach was developed, considering the actual complexity of the biological structure, as the nonhomogeneous and multilayered configuration of the gastric wall. Mechanical behavior was characterized by means of an anisotropic visco-hyperelastic constitutive formulation of fiber-reinforced conformation, nonlinear elastic response, and time-dependent behavior, which assume the typical features of gastric wall mechanics. Model applications allowed for an analysis of the influence of BS techniques on stomach mechanical functionality through different computational analyses. Results: Computational results showed that laparoscopic sleeve gastrectomy and endoscopic sleeve gastroplasty drastically alter stomach capacity and stiffness, while laparoscopic adjustable gastric banding modestly affects stomach stiffness and capacity. Moreover, the mean elongation strain values, which are correlated to the mechanical stimulation of gastric receptors, were elevated in laparoscopic adjustable gastric banding compared to other procedures. Conclusions: The investigation of stomach mechanical response through computational models provides information on different topics such as stomach capacity and stiffness and the mechanical stimulation of gastric receptors, which interact with the brain to control satiety. These data can provide reliable support to surgeons in the presurgical decision-making process.
Collapse
Affiliation(s)
- Ilaria Toniolo
- Department of Industrial Engineering, University of Padova, Via Venezia 1, 35131 Padova, Italy; (I.T.); (E.L.C.)
| | - Chiara Giulia Fontanella
- Department of Industrial Engineering, University of Padova, Via Venezia 1, 35131 Padova, Italy; (I.T.); (E.L.C.)
- Centre for Mechanics of Biological Materials, University of Padova, Via F. Marzolo 9, 35131 Padova, Italy;
- Correspondence: ; Tel.: +39-049-8276754
| | - Mirto Foletto
- Centre for Mechanics of Biological Materials, University of Padova, Via F. Marzolo 9, 35131 Padova, Italy;
- IFSO Bariatric Center of Excellence, Padova University Hospital, Via Ospedale Civile, 35121 Padova, Italy
| | - Emanuele Luigi Carniel
- Department of Industrial Engineering, University of Padova, Via Venezia 1, 35131 Padova, Italy; (I.T.); (E.L.C.)
- Centre for Mechanics of Biological Materials, University of Padova, Via F. Marzolo 9, 35131 Padova, Italy;
| |
Collapse
|
25
|
Non-Tuberculous Mycobacteria Interference with BCG-Current Controversies and Future Directions. Vaccines (Basel) 2020; 8:vaccines8040688. [PMID: 33207695 PMCID: PMC7711602 DOI: 10.3390/vaccines8040688] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 11/04/2020] [Accepted: 11/12/2020] [Indexed: 12/16/2022] Open
Abstract
The global tuberculosis (TB) epidemic caused by the bacterial pathogen Mycobacterium tuberculosis (M.tb) continues unabated. The Mycobacterium bovis bacillus Calmette–Guérin (BCG) vaccination is widely utilized worldwide to protect against infection with M.tb. BCG vaccine protection against TB has had widely varying results for reasons that are not well understood. BCG vaccine interference by non-tuberculosis (NTM) mycobacterial species has been implicated as the potential cause of reduced BCG vaccine efficacy against M.tb. Ongoing efforts to develop new vaccines for TB requires a thorough understanding of the effect of NTM exposure on BCG vaccine efficacy, which may ultimately be a critical determinant of success. We reviewed the conflicting reports on whether NTM interferes with the BCG vaccine, potential explanations to help resolve the controversy, and strategies for developing better animal models. Further studies are needed to longitudinally track the effects of NTM exposure on BCG vaccine-induced host-protective anti-TB immunity.
Collapse
|
26
|
An agent-based simulator for the gastrointestinal pathway of Listeria monocytogenes. Int J Food Microbiol 2020; 333:108776. [PMID: 32693315 DOI: 10.1016/j.ijfoodmicro.2020.108776] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 11/29/2019] [Accepted: 06/28/2020] [Indexed: 12/17/2022]
Abstract
We developed an agent-based gastric simulator for a human host to illustrate the within host survival mechanisms of Listeria monocytogenes. The simulator incorporates the gastric physiology and digestion processes that are critical for pathogen survival in the stomach. Mathematical formulations for the pH dynamics, stomach emptying time, and survival probability in the presence of gastric acid are integrated in the simulator to evaluate the portion of ingested bacteria that survives in the stomach and reaches the small intestine. The parameters are estimated using in vitro data relevant to the human stomach and L. monocytogenes. The simulator predicts that 5%-29% of ingested bacteria can survive a human stomach and reach the small intestine. In the absence of extensive scientific experiments, which are not feasible on the grounds of ethical and safety concerns, this simulator may provide a supplementary tool to evaluate pathogen survival and subsequent infection, especially with regards to the ingestion of small doses.
Collapse
|
27
|
Liu X, Hui X, Kang H, Fang Q, Chen A, Hu Y, Lu D, Chen X, Wang Y. A Multi-Gene Model Effectively Predicts the Overall Prognosis of Stomach Adenocarcinomas With Large Genetic Heterogeneity Using Somatic Mutation Features. Front Genet 2020; 11:940. [PMID: 33005171 PMCID: PMC7479248 DOI: 10.3389/fgene.2020.00940] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 07/28/2020] [Indexed: 12/24/2022] Open
Abstract
Background Stomach adenocarcinoma (STAD) is one of the most common malignancies worldwide with poor prognosis. It remains unclear whether the prognosis is associated with somatic gene mutations. Methods In this research, we collected two independent STAD cohorts with both genetic profiling and clinical follow-up data, systematically investigated the association between the prognosis and somatic mutations, and analyzed the influence of heterogeneity on the prognosis-genetics association. Results Typical association was identified between somatic mutations and overall prognosis for individual cohorts. In The Cancer Genome Atlas (TCGA) cohort, a list of 24 genes was also identified that tended to mutate within cases of the poorest prognosis. The association showed apparent heterogeneity between different cohorts, although common signatures could be identified. A machine-learning model was trained with 20 common genes that showed a similar mutation rate difference between prognostic groups in the two cohorts, and it classified the cases in each cohort into two groups with significantly different prognosis. The model outperformed both single-gene models and TNM-based staging system significantly. Conclusion The study made a systematic analysis on the association between STAD prognosis and somatic mutations, identified signature genes that showed mutation preference in different prognostic groups, and developed an effective multi-gene model that can effectively predict the overall prognosis of STAD in different cohorts.
Collapse
Affiliation(s)
- Xianming Liu
- Department of Gastrointestinal Surgery, Shenzhen People's Hospital, The Second Clinical Medical College of Jinan University, Shenzhen, China
| | - Xinjie Hui
- School of Basic Medicine, Shenzhen University Health Science Center, Shenzhen, China
| | - Huayu Kang
- School of Basic Medicine, Shenzhen University Health Science Center, Shenzhen, China
| | - Qiongfang Fang
- School of Basic Medicine, Shenzhen University Health Science Center, Shenzhen, China
| | - Aiyue Chen
- School of Basic Medicine, Shenzhen University Health Science Center, Shenzhen, China
| | - Yueming Hu
- School of Basic Medicine, Shenzhen University Health Science Center, Shenzhen, China
| | - Desheng Lu
- School of Basic Medicine, Shenzhen University Health Science Center, Shenzhen, China
| | - Xianxiong Chen
- School of Basic Medicine, Shenzhen University Health Science Center, Shenzhen, China
| | - Yejun Wang
- School of Basic Medicine, Shenzhen University Health Science Center, Shenzhen, China
| |
Collapse
|
28
|
Hu W, Ye T, Yang Y, Liu B, Zheng W. Effects of transport stress on pathological injury and expression of main heat shock proteins in the caprine stomach. BMC Vet Res 2020; 16:347. [PMID: 32962700 PMCID: PMC7507251 DOI: 10.1186/s12917-020-02569-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 09/11/2020] [Indexed: 11/24/2022] Open
Abstract
Background Transportation is necessary to introduce new breeds of goats to the farm and move the adult meat goat from the farm to the slaughterhouse. However, these actions may give rise to transport stress. Heat shock proteins (HSPs) are playing some important regulate roles during transport stress. The aim of this study was to evaluate the effects of transport stress on the pathological injury and HSPs expression in the stomach of goats. A total of three batches of Ganxi goats from western Jiangxi province were enrolled in this study. For each batch, twelve healthy adult male goats were randomly divided into three groups (four goats per batch and per group): Control group, stress group transported during 2 h and stress group transported during 6 h. Results Our results showed that the different degrees of stomach walls damage, with the change of expression levels of heat shock protein 27 (HSP27), heat shock protein 70 (HSP70) and heat shock protein 90 (HSP90), occurred after goats transportation. In rumen, the mRNA and protein expressions of HSP27 and HSP70 were increased after transport stress, but not HSP90. In reticulum, all three HSPs mRNA and protein levels were upregulated after 2 h transport, but decreased after 6 h transport. In omasum, HSP27 and HSP70 mRNA and protein were increased after transport stress, however, HSP90 mRNA level only had a slightly enhancement after transport stress. In abomasum, HSP70 and HSP90 mRNA and protein levels were increased after transport stress, but HSP27 was decreased after transport stress. Conclusions Taken together, these results revealed that the pathological changes in the gastric tissues and the stomach HSPs expression in goats are related to transport stress and duration. Moreover, this study also provides some new data to advocate reducing transport stress of goats and improving animal welfare.
Collapse
Affiliation(s)
- Wei Hu
- College of Life Science and Resources and Environment, Yichun University, Yichun, 336000, Jiangxi, China
| | - Tian Ye
- College of Life Science and Resources and Environment, Yichun University, Yichun, 336000, Jiangxi, China
| | - Yanzhen Yang
- College of Life Science and Resources and Environment, Yichun University, Yichun, 336000, Jiangxi, China
| | - Ben Liu
- College of Life Science and Resources and Environment, Yichun University, Yichun, 336000, Jiangxi, China. .,Jiangxi Lvke Agriculture and Animal Husbandry Technology co. LTD, Yichun, 336000, Jiangxi, China. .,Engineering Technology Research Center of Jiangxi Universities and Colleges for Selenium Agriculture, Yichun, 336000, Jiangxi, China.
| | - Wenya Zheng
- College of Life Science and Resources and Environment, Yichun University, Yichun, 336000, Jiangxi, China.
| |
Collapse
|
29
|
Esfandi F, Bouraghi H, Glassy MC, Taheri M, Kahaei MS, Kholghi Oskooei V, Ghafouri‐Fard S. Brain‐derived neurotrophic factor downregulation in gastric cancer. J Cell Biochem 2019; 120:17831-17837. [DOI: 10.1002/jcb.29050] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 04/13/2019] [Accepted: 04/18/2019] [Indexed: 01/14/2023]
Affiliation(s)
- Farbod Esfandi
- Department of Medical Genetics Shahid Beheshti University of Medical Sciences Tehran Iran
| | - Hamid Bouraghi
- Department of Health Information Technology, School of Paramedical Sciences Hamadan University of Medical Sciences Hamadan Iran
| | - Mark C Glassy
- Translational Neuro‐Oncology Laboratory, UCSD Moores Cancer Center University of California La Jolla CA USA
| | - Mohammad Taheri
- Urogenital Stem Cell Research Center Shahid Beheshti University of Medical Sciences Tehran Iran
| | - Mir Salar Kahaei
- Department of Medical Genetics Shahid Beheshti University of Medical Sciences Tehran Iran
| | - Vahid Kholghi Oskooei
- Department of Medical Genetics Shahid Beheshti University of Medical Sciences Tehran Iran
| | - Soudeh Ghafouri‐Fard
- Department of Medical Genetics Shahid Beheshti University of Medical Sciences Tehran Iran
| |
Collapse
|
30
|
Impact of regional differences along the gastrointestinal tract of healthy adults on oral drug absorption: An UNGAP review. Eur J Pharm Sci 2019; 134:153-175. [DOI: 10.1016/j.ejps.2019.04.013] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 04/03/2019] [Accepted: 04/09/2019] [Indexed: 02/06/2023]
|
31
|
Lie KK, Tørresen OK, Solbakken MH, Rønnestad I, Tooming-Klunderud A, Nederbragt AJ, Jentoft S, Sæle Ø. Loss of stomach, loss of appetite? Sequencing of the ballan wrasse (Labrus bergylta) genome and intestinal transcriptomic profiling illuminate the evolution of loss of stomach function in fish. BMC Genomics 2018; 19:186. [PMID: 29510660 PMCID: PMC5840709 DOI: 10.1186/s12864-018-4570-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 02/28/2018] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The ballan wrasse (Labrus bergylta) belongs to a large teleost family containing more than 600 species showing several unique evolutionary traits such as lack of stomach and hermaphroditism. Agastric fish are found throughout the teleost phylogeny, in quite diverse and unrelated lineages, indicating stomach loss has occurred independently multiple times in the course of evolution. By assembling the ballan wrasse genome and transcriptome we aimed to determine the genetic basis for its digestive system function and appetite regulation. Among other, this knowledge will aid the formulation of aquaculture diets that meet the nutritional needs of agastric species. RESULTS Long and short read sequencing technologies were combined to generate a ballan wrasse genome of 805 Mbp. Analysis of the genome and transcriptome assemblies confirmed the absence of genes that code for proteins involved in gastric function. The gene coding for the appetite stimulating protein ghrelin was also absent in wrasse. Gene synteny mapping identified several appetite-controlling genes and their paralogs previously undescribed in fish. Transcriptome profiling along the length of the intestine found a declining expression gradient from the anterior to the posterior, and a distinct expression profile in the hind gut. CONCLUSIONS We showed gene loss has occurred for all known genes related to stomach function in the ballan wrasse, while the remaining functions of the digestive tract appear intact. The results also show appetite control in ballan wrasse has undergone substantial changes. The loss of ghrelin suggests that other genes, such as motilin, may play a ghrelin like role. The wrasse genome offers novel insight in to the evolutionary traits of this large family. As the stomach plays a major role in protein digestion, the lack of genes related to stomach digestion in wrasse suggests it requires formulated diets with higher levels of readily digestible protein than those for gastric species.
Collapse
Affiliation(s)
- Kai K. Lie
- Institute of Marine Research, P.O. Box. 1870, Nordnes, 5817 Bergen, NO Norway
| | - Ole K. Tørresen
- Centre for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, P.O. Box 1066, Blindern, 0316 Oslo, NO Norway
| | - Monica Hongrø Solbakken
- Centre for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, P.O. Box 1066, Blindern, 0316 Oslo, NO Norway
| | - Ivar Rønnestad
- Department of Biology, University of Bergen, P.O. Box 7803, 5020 Bergen, NO Norway
| | - Ave Tooming-Klunderud
- Centre for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, P.O. Box 1066, Blindern, 0316 Oslo, NO Norway
| | - Alexander J. Nederbragt
- Centre for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, P.O. Box 1066, Blindern, 0316 Oslo, NO Norway
- Biomedical Informatics Research Group, Department of Informatics, University of Oslo, P.O. Box 1066, Blindern, 0316 Oslo, Norway
| | - Sissel Jentoft
- Centre for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, P.O. Box 1066, Blindern, 0316 Oslo, NO Norway
| | - Øystein Sæle
- Institute of Marine Research, P.O. Box. 1870, Nordnes, 5817 Bergen, NO Norway
| |
Collapse
|
32
|
Gonçalves R, Saad R, Malheiros CA, Kassab P, Vieira NLP. Gastric cancer with lesion extending to spleen and perforation into free peritoneum. Rev Assoc Med Bras (1992) 2017; 63:484-487. [PMID: 28876422 DOI: 10.1590/1806-9282.63.06.484] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 12/04/2016] [Indexed: 11/22/2022] Open
Abstract
Perforated gastric carcinoma is a rare condition that is hard to diagnose preoperatively. It is associated with advanced cancer stages and has a high mortality, particularly in cases presenting preoperative shock. Few studies have investigated the presentation and adequate management of these carcinomas. In addition, there are no reports in the literature on perforations extending to the spleen, as described in this case, making the management of these lesions challenging. Our article reports a case of gastric tumor perforation extending to the spleen, which presented as a perforated acute abdomen. The patient was treated with total gastrectomy and D2 lymph node resection with splenectomy and progressed well with current survival of one year at disease stage IV.
Collapse
Affiliation(s)
- Roberto Gonçalves
- MD, MSc. Department of Surgery, Faculdade de Ciências Médicas da Santa Casa de São Paulo (FCMSCSP), São Paulo, SP, Brazil
| | - Roberto Saad
- MD, PhD. Department of Surgery, FCMSCSP, São Paulo, SP, Brazil
| | | | - Paulo Kassab
- MD, PhD. Department of Surgery, FCMSCSP, São Paulo, SP, Brazil
| | | |
Collapse
|
33
|
Van Den Abeele J, Rubbens J, Brouwers J, Augustijns P. The dynamic gastric environment and its impact on drug and formulation behaviour. Eur J Pharm Sci 2017; 96:207-231. [DOI: 10.1016/j.ejps.2016.08.060] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 08/30/2016] [Accepted: 08/30/2016] [Indexed: 02/08/2023]
|
34
|
Date AA, Hanes J, Ensign LM. Nanoparticles for oral delivery: Design, evaluation and state-of-the-art. J Control Release 2016; 240:504-526. [PMID: 27292178 DOI: 10.1016/j.jconrel.2016.06.016] [Citation(s) in RCA: 258] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 06/07/2016] [Accepted: 06/08/2016] [Indexed: 02/06/2023]
Abstract
The oral route is a preferred method of drug administration, though achieving effective drug delivery and minimizing off-target side effects is often challenging. Formulation into nanoparticles can improve drug stability in the harsh gastrointestinal (GI) tract environment, providing opportunities for targeting specific sites in the GI tract, increasing drug solubility and bioavailability, and providing sustained release in the GI tract. However, the unique and diverse physiology throughout the GI tract, including wide variation in pH, mucus that varies in thickness and structure, numerous cell types, and various physiological functions are both a barrier to effective delivery and an opportunity for nanoparticle design. Here, nanoparticle design aspects to improve delivery to particular sites in the GI tract are discussed. We then review new methods for evaluating oral nanoparticle formulations, including a short commentary on data interpretation and translation. Finally, the state-of-the-art in preclinical targeted nanoparticle design is reviewed.
Collapse
Affiliation(s)
- Abhijit A Date
- The Center for Nanomedicine, The Wilmer Eye Institute, Johns Hopkins University School of Medicine, 400 N Broadway, Baltimore, MD 21231, USA; Department of Ophthalmology, The Wilmer Eye Institute, Johns Hopkins University School of Medicine, 400 N. Broadway, Baltimore, MD 21231, USA
| | - Justin Hanes
- The Center for Nanomedicine, The Wilmer Eye Institute, Johns Hopkins University School of Medicine, 400 N Broadway, Baltimore, MD 21231, USA; Department of Ophthalmology, The Wilmer Eye Institute, Johns Hopkins University School of Medicine, 400 N. Broadway, Baltimore, MD 21231, USA; Department of Chemical and Biomolecular Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA; Departments of Biomedical Engineering, Environmental and Health Sciences, Oncology, Neurosurgery, Pharmacology and Molecular Sciences, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Laura M Ensign
- The Center for Nanomedicine, The Wilmer Eye Institute, Johns Hopkins University School of Medicine, 400 N Broadway, Baltimore, MD 21231, USA; Department of Ophthalmology, The Wilmer Eye Institute, Johns Hopkins University School of Medicine, 400 N. Broadway, Baltimore, MD 21231, USA; Department of Chemical and Biomolecular Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA.
| |
Collapse
|
35
|
Matsushima K, Won EJ, Tangel MR, Enomoto LM, Avella DM, Soybel DI. Emphysematous gastritis and gastric emphysema: similar radiographic findings, distinct clinical entities. World J Surg 2015; 39:1008-17. [PMID: 25446476 DOI: 10.1007/s00268-014-2882-7] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Despite similar appearances on imaging studies, emphysematous gastritis (EG) and gastric emphysema (GE) are rare clinical entities encountered in surgical practices. The purpose of this review is to clarify the presentation, natural history, and optimal treatment strategies for these two disorders. METHODS We conducted a comprehensive literature review for reported adult cases of EG and GE in MEDLINE. Two cases from our institution were also included. Patient with demographics, diagnostic and therapeutic data, and outcomes were compared between patients with EG and GE. RESULTS A total of 75 cases were included for our review. The finding of intramural air in the stomach was often associated with portal vein gas, pneumatosis intestinalis, or pneumoperitoneum in both groups. Surgical removal of the stomach was performed in 23.1% of EG patients, but only one patient in the GE group. In the EG group, overall mortality (55%) appeared to be driven by sepsis and its complications, whereas in the GE group, mortality (29%) was attributable to comorbid conditions and the underlying illness. CONCLUSIONS Prompt surgical intervention is more commonly indicated for severe EG and is directed at removal of the septic organ, while the primary indication for surgical intervention in GE is the uncertainty of the diagnosis.
Collapse
Affiliation(s)
- Kazuhide Matsushima
- Department of Surgery, University of Southern California, 1200 N. State Street, Inpatient Tower (C), Rm C5L100, Los Angeles, CA, 90033, USA,
| | | | | | | | | | | |
Collapse
|
36
|
The gastric fluid proteome as a potential source of gastric cancer biomarkers. J Proteomics 2013; 90:3-13. [PMID: 23665003 DOI: 10.1016/j.jprot.2013.04.035] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2012] [Revised: 04/17/2013] [Accepted: 04/18/2013] [Indexed: 12/17/2022]
Abstract
Gastric cancer is a significant cause of death in many parts of the world. Although timely intervention is associated with better clinical outcome, early gastric cancer detection is frequently not possible given its asymptomatic nature. As such, sensitive and specific gastric cancer biomarkers are highly sought after as diagnostic surrogates that may replace invasive endoscopic and histological examinations. Unlike gastric cancer tissue and serum which are heterogeneous and overloaded with abundant proteins, the gastric fluid contains a concentrated molecular biopsy of the stomach that accurately reflects gastric oncology. This review attempts to (i) summarise the state of proteomics-based gastric cancer biomarker discovery from patient gastric fluids, (ii) outline key considerations in working with the body fluid, and (ii) discuss how the challenges in gastric cancer diagnosis may be overcome with new perspectives in gastric cancer screening.
Collapse
|
37
|
Imai Y, Kobayashi I, Ishida S, Ishikawa T, Buist M, Yamaguchi T. Antral recirculation in the stomach during gastric mixing. Am J Physiol Gastrointest Liver Physiol 2013; 304:G536-42. [PMID: 23275619 DOI: 10.1152/ajpgi.00350.2012] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
We investigate flow in the stomach during gastric mixing using a numerical simulation with an anatomically realistic geometry and free-surface flow modeling. Because of momentum differences between greater and lesser curvatures during peristaltic contractions, time-averaged recirculation is generated in the antrum, with retropulsive flow away from the pylorus and compensation flow along the greater curvature toward the pylorus. Gastric content in the distal stomach is continuously transported to the distal antrum by the forward flow of antral recirculation, and it is then mixed by the backward retropulsive flow. Hence, the content inside the antral recirculation is well mixed independently of initial location, whereas the content outside the recirculation is poorly mixed. Free-surface modeling enables us to analyze the effects of posture on gastric mixing. In the upright, prone, and right lateral positions, most of the antrum is filled with content, and the content is well mixed by antral recirculation. In contrast, in the supine and left lateral positions, most of the content is located outside antral recirculation, which results in poor mixing. The curved, twisted shape of the stomach substantially supports gastric mixing in fluid mechanical terms.
Collapse
Affiliation(s)
- Yohsuke Imai
- Department of Bioengineering and Robotics, Tohoku University, 6-6-01 Aoba, Aoba, Sendai 980-8579, Japan.
| | | | | | | | | | | |
Collapse
|
38
|
Cheng LK, O'Grady G, Du P, Egbuji JU, Windsor JA, Pullan AJ. Gastrointestinal system. WILEY INTERDISCIPLINARY REVIEWS-SYSTEMS BIOLOGY AND MEDICINE 2011; 2:65-79. [PMID: 20836011 DOI: 10.1002/wsbm.19] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The functions of the gastrointestinal (GI) tract include digestion, absorption, excretion, and protection. In this review, we focus on the electrical activity of the stomach and small intestine, which underlies the motility of these organs, and where the most detailed systems descriptions and computational models have been based to date. Much of this discussion is also applicable to the rest of the GI tract. This review covers four major spatial scales: cell, tissue, organ, and torso, and discusses the methods of investigation and the challenges associated with each. We begin by describing the origin of the electrical activity in the interstitial cells of Cajal, and its spread to smooth muscle cells. The spread of electrical activity through the stomach and small intestine is then described, followed by the resultant electrical and magnetic activity that may be recorded on the body surface. A number of common and highly symptomatic GI conditions involve abnormal electrical and/or motor activity, which are often termed functional disorders. In the last section of this review we address approaches being used to characterize and diagnose abnormalities in the electrical activity and how these might be applied in the clinical setting. The understanding of electrophysiology and motility of the GI system remains a challenging field, and the review discusses how biophysically based mathematical models can help to bridge gaps in our current knowledge, through integration of otherwise separate concepts.
Collapse
Affiliation(s)
- Leo K Cheng
- Auckland Bioengineering Institute, The University of Auckland, Auckland 1142, New Zealand
| | - Gregory O'Grady
- Auckland Bioengineering Institute, The University of Auckland, Auckland 1142, New Zealand.,Department of Surgery, The University of Auckland, Auckland 1142, New Zealand
| | - Peng Du
- Auckland Bioengineering Institute, The University of Auckland, Auckland 1142, New Zealand.,Department of Surgery, The University of Auckland, Auckland 1142, New Zealand
| | - John U Egbuji
- Auckland Bioengineering Institute, The University of Auckland, Auckland 1142, New Zealand.,Department of Surgery, The University of Auckland, Auckland 1142, New Zealand
| | - John A Windsor
- Department of Surgery, The University of Auckland, Auckland 1142, New Zealand
| | - Andrew J Pullan
- Auckland Bioengineering Institute, The University of Auckland, Auckland 1142, New Zealand.,Department of Engineering Science, The University of Auckland, Auckland 1142, New Zealand.,Department of Surgery, Vanderbilt University, Nashville, TN 37235-5225
| |
Collapse
|
39
|
Latest results (12-21 years) of a prospective randomized study comparing Billroth II and Roux-en-Y anastomosis after a partial gastrectomy plus vagotomy in patients with duodenal ulcers. Ann Surg 2009; 249:189-94. [PMID: 19212169 DOI: 10.1097/sla.0b013e3181921aa1] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
INTRODUCTION After a partial resection of the stomach, the continuity of the gastrointestinal tract can be restored either by a Billroth II gastrojejunal anastomosis or a Roux-en-Y gastrojejunostomy. Each procedure has its advantages and disadvantages. OBJECTIVE To determine through a prospective and random clinical trial, the clinical outcome and the endoscopic and histologic alterations of the distal esophagus and the gastric remnant in patients who received a partial distal gastrectomy due to duodenal ulcers and a Billroth II or Roux-en-Y reconstruction. MATERIAL AND METHODS In this prospective random trial, a total of 75 patients with duodenal ulcers were included. A bilateral selective vagotomy and partial distal gastrectomy were performed in all patients. A Billroth II or Roux-en-Y 60-cm-long loop was randomly used for reconstruction of the gastrointestinal tract. During the latest follow-up clinical evaluation, upper endoscopy and biopsy samples from the distal esophagus and gastric remnant were obtained. RESULTS There was 1 operative mortality and 6 patients had some morbidity. The average follow-up period was 15.5 years (range, 11-21). Patients with Roux-en-Y gastrojejunostomy were significantly more asymptomatic and had greater Visick I grading than patients with Billroth II reconstruction (P < 0.001). In the distal esophagus, endoscopic findings were normal in 90% of the Roux-en-Y group, but only in 51% of the Billroth II group (P < 0.0009). Nearly 25% of the latter group had the appearance of a short-segment Barrett esophagus compared with 3% of the Roux-en-Y group (P < 0.0001). The gastric remnant endoscopic findings were normal in 100% of the Roux-en-Y group and in 18% of the Billroth II group (P < 0.02). Histologic analyses showed similar proportions of normal fundic mucosa and chronic active fundic gastritis. However, chronic atrophic fundic gastritis and intestinal metaplasia were significantly more frequent after Billroth II reconstruction (P < 0.008). Helicobacter pylorus was present in a similar proportion of patients. CONCLUSIONS This prospective and random study showed that Roux-en-Y gastrojejunostomy is significantly better than a Billroth II reconstruction in patients with duodenal ulcers, through subjective and objective endoscopic and histologic evaluations during the latest follow-up evaluation.
Collapse
|
40
|
Vidal JD, Mirabile RC, Thomas HC. Evaluation of the Cynomolgus Monkey Stomach: Recommendations for Standard Sampling Procedures in Nonclinical Safety Studies. Toxicol Pathol 2008; 36:250-5. [DOI: 10.1177/0192623307312700] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The cynomolgus macaque is the most commonly used nonhuman primate in nonclinical toxicity testing, but the macroscopic and microscopic anatomy of the stomach in the cynomolgus macaque is poorly described. To develop a reliable sampling method for histologic evaluation of the cynomolgus macaque stomach in regulatory toxicity studies, the stomachs of control animals were prospectively evaluated using an extensive sectioning pattern. The stomach of the cynomolgus macaque differs from that described for the human stomach and has a prominent fundus that lacks parietal cells. A description of the macroscopic and microscopic anatomy is presented along with a recommended sectioning pattern for nonclinical toxicity studies and discussion of species differences. A thorough understanding of normal anatomy and species comparisons are critical to interpretation of potential toxicity findings and assessment of risk in humans.
Collapse
|
41
|
Certad G, Ngouanesavanh T, Guyot K, Gantois N, Chassat T, Mouray A, Fleurisse L, Pinon A, Cailliez JC, Dei-Cas E, Creusy C. Cryptosporidium parvum, a potential cause of colic adenocarcinoma. Infect Agent Cancer 2007; 2:22. [PMID: 18031572 PMCID: PMC2217515 DOI: 10.1186/1750-9378-2-22] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2007] [Accepted: 11/21/2007] [Indexed: 12/12/2022] Open
Abstract
Background Cryptosporidiosis represents a major public health problem. This infection has been reported worldwide as a frequent cause of diarrhoea. Particularly, it remains a clinically significant opportunistic infection among immunocompromised patients, causing potentially life-threatening diarrhoea in HIV-infected persons. However, the understanding about different aspects of this infection such as invasion, transmission and pathogenesis is problematic. Additionally, it has been difficult to find suitable animal models for propagation of this parasite. Efforts are needed to develop reproducible animal models allowing both the routine passage of different species and approaching unclear aspects of Cryptosporidium infection, especially in the pathophysiology field. Results We developed a model using adult severe combined immunodeficiency (SCID) mice inoculated with Cryptosporidium parvum or Cryptosporidium muris while treated or not with Dexamethasone (Dex) in order to investigate divergences in prepatent period, oocyst shedding or clinical and histopathological manifestations. C. muris-infected mice showed high levels of oocysts excretion, whatever the chemical immunosuppression status. Pre-patent periods were 11 days and 9.7 days in average in Dex treated and untreated mice, respectively. Parasite infection was restricted to the stomach, and had a clear preferential colonization for fundic area in both groups. Among C. parvum-infected mice, Dex-treated SCID mice became chronic shedders with a prepatent period of 6.2 days in average. C. parvum-inoculated mice treated with Dex developed glandular cystic polyps with areas of intraepithelial neoplasia, and also with the presence of intramucosal adenocarcinoma. Conclusion For the first time C. parvum is associated with the formation of polyps and adenocarcinoma lesions in the gut of Dex-treated SCID mice. Additionally, we have developed a model to compare chronic muris and parvum cryptosporidiosis using SCID mice treated with corticoids. This reproducible model has facilitated the evaluation of clinical signs, oocyst shedding, location of the infection, pathogenicity, and histopathological changes in the gastrointestinal tract, indicating divergent effects of Dex according to Cryptosporidium species causing infection.
Collapse
Affiliation(s)
- Gabriela Certad
- Ecologie du Parasitisme (EA3609 Université de Lille 2), IFR 142, Institut Pasteur de Lille, Lille, France.,Cátedra de Parasitología, Escuela de Medicina "José María Vargas", Universidad Central de Venezuela (UCV), Caracas, Venezuela
| | - Tramy Ngouanesavanh
- Ecologie du Parasitisme (EA3609 Université de Lille 2), IFR 142, Institut Pasteur de Lille, Lille, France
| | - Karine Guyot
- Ecologie du Parasitisme (EA3609 Université de Lille 2), IFR 142, Institut Pasteur de Lille, Lille, France
| | - Nausicaa Gantois
- Ecologie du Parasitisme (EA3609 Université de Lille 2), IFR 142, Institut Pasteur de Lille, Lille, France
| | - Thierry Chassat
- Plateau d'Expérimentation Animale, Institut Pasteur de Lille, France
| | - Anthony Mouray
- Plateau d'Expérimentation Animale, Institut Pasteur de Lille, France
| | - Laurence Fleurisse
- Service d'Anatomie et de Cytologie Pathologiques, Groupe Hospitalier de l'Université Catholique de Lille, France
| | - Anthony Pinon
- Unité de Sécurité Microbiologique, Institut Pasteur de Lille, France
| | | | - Eduardo Dei-Cas
- Ecologie du Parasitisme (EA3609 Université de Lille 2), IFR 142, Institut Pasteur de Lille, Lille, France.,Parasitologie-Mycologie, Centre Hospitalier Régional et Universitaire de Lille, Université de Lille 2, France
| | - Colette Creusy
- Service d'Anatomie et de Cytologie Pathologiques, Groupe Hospitalier de l'Université Catholique de Lille, France
| |
Collapse
|
42
|
Egan BJ, Holmes K, O'Connor HJ, O'Morain CA. Helicobacter pylori gastritis, the unifying concept for gastric diseases. Helicobacter 2007; 12 Suppl 2:39-44. [PMID: 17991175 DOI: 10.1111/j.1523-5378.2007.00575.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Helicobacter pylori infection causes a broad spectrum of clinical diseases and the clinical manifestations of the infection depend on host, environmental, and bacterial factors. These factors have an impact on the pattern and severity of gastritis and ultimately determine the clinical outcome of H. pylori infection. Better staging of gastritis may help to identify patients at risk of gastric cancer. In this article we will examine the complex interaction between host, environmental, and bacterial factors in the pathogenesis of H. pylori infection.
Collapse
Affiliation(s)
- Brian J Egan
- Department of Clinical Medicine, Adelaide and Meath Hospital Incorporating the National Children's Hospital, Tallaght, Trinity College, Dublin, Ireland.
| | | | | | | |
Collapse
|
43
|
Bibliography. Current world literature. Outcome measures. Curr Opin Allergy Clin Immunol 2006; 6:241-4. [PMID: 16670521 DOI: 10.1097/01.all.0000225167.72842.fd] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
44
|
Abstract
PURPOSE OF REVIEW The role of the stomach as the primary location of protein digestion is very well recognized, leading to classification of proteins as digestion-resistant or digestion-labile. This review analyses the role of gastric digestion in food allergy. RECENT FINDINGS Hindrance of gastric digestion by elevation of the gastric pH, the therapeutic goal of anti-ulcer medication, was recently shown to trigger food allergy via oral sensitization in a murine food allergy model. The relevance in humans was assessed in an observational study of 152 gastroenterological patients who were medicated with anti-ulcer drugs due to dyspeptic disorders. Twenty-five percent of all patients developed a boost or de-novo IgE formation towards regular constituents of the daily diet. The clinical relevance of the induced antibodies was confirmed by positive skin and oral-provocation tests. Moreover, the importance of gastric digestion was also proven for food-allergic patients, as the allergenicity of allergens were reduced up to a 10,000-fold by gastric digestion. SUMMARY These recent studies indicate for the first time the important gate-keeping function of gastric digestion, both in the sensitization and the effector phases of food allergy.
Collapse
Affiliation(s)
- Eva Untersmayr
- Center of Physiology and Pathophysiology, Medical University Vienna, Vienna, Austria
| | | |
Collapse
|