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Chiriac S, Sfarti CV, Minea H, Stanciu C, Cojocariu C, Singeap AM, Girleanu I, Cuciureanu T, Petrea O, Huiban L, Muzica CM, Zenovia S, Nastasa R, Stafie R, Rotaru A, Stratina E, Trifan A. Impaired Intestinal Permeability Assessed by Confocal Laser Endomicroscopy-A New Potential Therapeutic Target in Inflammatory Bowel Disease. Diagnostics (Basel) 2023; 13:diagnostics13071230. [PMID: 37046447 PMCID: PMC10093200 DOI: 10.3390/diagnostics13071230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/19/2023] [Accepted: 03/22/2023] [Indexed: 04/14/2023] Open
Abstract
Inflammatory bowel diseases (IBD) represent a global phenomenon, with a continuously rising prevalence. The strategies concerning IBD management are progressing from clinical monitorization to a targeted approach, and current therapies strive to reduce microscopic mucosal inflammation and stimulate repair of the epithelial barrier function. Intestinal permeability has recently been receiving increased attention, as evidence suggests that it could be related to disease activity in IBD. However, most investigations do not successfully provide adequate information regarding the morphological integrity of the intestinal barrier. In this review, we discuss the advantages of confocal laser endomicroscopy (CLE), which allows in vivo visualization of histological abnormalities and targeted optical biopsies in the setting of IBD. Additionally, CLE has been used to assess vascular permeability and epithelial barrier function that could correlate with prolonged clinical remission, increased resection-free survival, and lower hospitalization rates. Moreover, the dynamic evaluation of the functional characteristics of the intestinal barrier presents an advantage over the endoscopic examination as it has the potential to select patients at risk of relapses. Along with mucosal healing, histological or transmural remission, the recovery of the intestinal barrier function emerges as a possible target that could be included in the future therapeutic strategies for IBD.
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Affiliation(s)
- Stefan Chiriac
- Department of Gastroenterology, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
- Institute of Gastroenterology and Hepatology, "St. Spiridon" University Hospital, 700111 Iasi, Romania
| | - Catalin Victor Sfarti
- Department of Gastroenterology, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
- Institute of Gastroenterology and Hepatology, "St. Spiridon" University Hospital, 700111 Iasi, Romania
| | - Horia Minea
- Department of Gastroenterology, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
- Institute of Gastroenterology and Hepatology, "St. Spiridon" University Hospital, 700111 Iasi, Romania
| | - Carol Stanciu
- Department of Gastroenterology, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
- Institute of Gastroenterology and Hepatology, "St. Spiridon" University Hospital, 700111 Iasi, Romania
| | - Camelia Cojocariu
- Department of Gastroenterology, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
- Institute of Gastroenterology and Hepatology, "St. Spiridon" University Hospital, 700111 Iasi, Romania
| | - Ana-Maria Singeap
- Department of Gastroenterology, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
- Institute of Gastroenterology and Hepatology, "St. Spiridon" University Hospital, 700111 Iasi, Romania
| | - Irina Girleanu
- Department of Gastroenterology, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
- Institute of Gastroenterology and Hepatology, "St. Spiridon" University Hospital, 700111 Iasi, Romania
| | - Tudor Cuciureanu
- Department of Gastroenterology, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
- Institute of Gastroenterology and Hepatology, "St. Spiridon" University Hospital, 700111 Iasi, Romania
| | - Oana Petrea
- Department of Gastroenterology, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
- Institute of Gastroenterology and Hepatology, "St. Spiridon" University Hospital, 700111 Iasi, Romania
| | - Laura Huiban
- Department of Gastroenterology, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
- Institute of Gastroenterology and Hepatology, "St. Spiridon" University Hospital, 700111 Iasi, Romania
| | - Cristina Maria Muzica
- Department of Gastroenterology, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
- Institute of Gastroenterology and Hepatology, "St. Spiridon" University Hospital, 700111 Iasi, Romania
| | - Sebastian Zenovia
- Department of Gastroenterology, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
- Institute of Gastroenterology and Hepatology, "St. Spiridon" University Hospital, 700111 Iasi, Romania
| | - Robert Nastasa
- Department of Gastroenterology, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
- Institute of Gastroenterology and Hepatology, "St. Spiridon" University Hospital, 700111 Iasi, Romania
| | - Remus Stafie
- Department of Gastroenterology, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
- Institute of Gastroenterology and Hepatology, "St. Spiridon" University Hospital, 700111 Iasi, Romania
| | - Adrian Rotaru
- Department of Gastroenterology, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
- Institute of Gastroenterology and Hepatology, "St. Spiridon" University Hospital, 700111 Iasi, Romania
| | - Ermina Stratina
- Department of Gastroenterology, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
- Institute of Gastroenterology and Hepatology, "St. Spiridon" University Hospital, 700111 Iasi, Romania
| | - Anca Trifan
- Department of Gastroenterology, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
- Institute of Gastroenterology and Hepatology, "St. Spiridon" University Hospital, 700111 Iasi, Romania
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Karl JP, Armstrong NJ, Player RA, Rood JC, Soares JW, McClung HL. The Fecal Metabolome Links Diet Composition, Foacidic positive ion conditions, chromatographicallyod Processing, and the Gut Microbiota to Gastrointestinal Health in a Randomized Trial of Adults Consuming a Processed Diet. J Nutr 2022; 152:2343-2357. [PMID: 36774101 DOI: 10.1093/jn/nxac161] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 06/17/2022] [Accepted: 07/15/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Food processing alters diet digestibility and composition, thereby influencing interactions between host biology, diet, and the gut microbiota. The fecal metabolome offers insight into those relations by providing a readout of diet-microbiota interactions impacting host health. OBJECTIVES The aims were to determine the effects of consuming a processed diet on the fecal metabolome and to explore relations between changes in the fecal metabolome with fecal microbiota composition and gastrointestinal health markers. METHODS This was a secondary analysis of a randomized controlled trial wherein healthy adults [94% male; 18-61 y; BMI (kg/m2): 26 ± 3] consumed their usual diet [control (CON), n = 27] or a Meal, Ready-to-EatTM (Ameriqual Packaging) military ration diet composed of processed, shelf-stable, ready-to-eat items for 21 d (MRE; n = 27). Fecal metabolite profiles, fecal microbiota composition, biomarkers of intestinal barrier function, and gastrointestinal symptoms were measured before and after the intervention. Between-group differences and associations were assessed using nonparametric t tests, partial least-squares discriminant analysis, correlation, and redundancy analysis. RESULTS Fecal concentrations of multiple dipeptides [Mann-Whitney effect size (ES) = 0.27-0.50] and long-chain SFAs (ES = 0.35-0.58) increased, whereas plant-derived compounds (ES = 0.31-0.60) decreased in MRE versus CON (P < 0.05; q < 0.20). Changes in dipeptides correlated positively with changes in fecal concentrations of Maillard-reaction products (ρ = 0.29-0.70; P < 0.05) and inversely with changes in serum prealbumin (ρ = -0.30 to -0.48; P ≤ 0.03). Multiple bile acids, coffee and caffeine metabolites, and plant-derived compounds were associated with both fecal microbiota composition and gastrointestinal health markers, with changes in fecal microbiota composition explaining 26% of the variability within changes in gastrointestinal health-associated fecal metabolites (P = 0.001). CONCLUSIONS Changes in the fecal metabolomes of adults consuming a Meal, Ready-to-EatTM diet implicate interactions between diet composition, diet digestibility, and the gut microbiota as contributing to variability within gastrointestinal responses to the diet. Findings underscore the need to consider both food processing and nutrient composition when investigating the impact of diet-gut microbiota interactions on health outcomes. This trial was registered at www. CLINICALTRIALS gov as NCT02423551.
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Affiliation(s)
- J Philip Karl
- Military Nutrition Division, US Army Research Institute of Environmental Medicine, Natick, MA, USA.
| | - Nicholes J Armstrong
- Military Nutrition Division, US Army Research Institute of Environmental Medicine, Natick, MA, USA
| | - Robert A Player
- Johns Hopkins University Applied Physics Laboratory, Laurel, MD, USA
| | | | - Jason W Soares
- Soldier Effectiveness Directorate, US Army Combat Capabilities Development Command Soldier Center, Natick, MA, USA
| | - Holly L McClung
- Military Nutrition Division, US Army Research Institute of Environmental Medicine, Natick, MA, USA
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Changes of Intestinal Permeability («Triple Sugar Test») in Patients with Primary Biliary Cholangitis. BIONANOSCIENCE 2022. [DOI: 10.1007/s12668-022-00944-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Lipopolysaccharide binding protein is associated with CVD risk in older adults. Aging Clin Exp Res 2021; 33:1651-1658. [PMID: 32895891 DOI: 10.1007/s40520-020-01684-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 08/11/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND Intestinal (i.e., "gut") permeability may be related to cardiovascular disease (CVD) risk, but biomarkers for gut permeability are limited and associations with CVD risk are unknown-particularly among older adults. AIMS This cross-sectional study aimed to determine if serum biomarkers related to gut permeability [intestinal fatty acid-binding protein (iFABP)] and bacterial toxin clearing [cluster of differentiation 14 (CD14), lipopolysaccharide binding protein (LBP)] are associated with CVD risk among older adults. METHODS Older adults (n = 74, 69.6 ± 6.5-years-old) were stratified by CVD risk category. One-way ANOVAs determined differences in each biomarker by risk category, and associations with risk score were evaluated with Pearson correlations. RESULTS LBP (p = 0.007), but not iFABP and CD14, was significantly different between CVD risk categories. Post-hoc tests indicated LBP was higher in moderate risk and high-moderate risk compared to the high risk category (p < 0.005). Evaluation of LBP and individual components in the risk score demonstrated a moderate, negative correlation of LBP with age and systolic blood pressure (r = - 0.335 and r = - 0.297) and a small positive correlation between LBP and total cholesterol and LDL cholesterol (r = 0.204 and r = 0.220). DISCUSSION/CONCLUSION Lower risk for CVD was associated with higher circulating concentrations of LBP, lower iFABP, and lower systemic inflammation in older adults. Further, there were small positive relationships between total and LDL cholesterol and circulating levels of LBP. These data suggest LBP may be a key component in reducing CVD risk in older adults.
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Hagan M, Hayee BH, Rodriguez-Mateos A. (Poly)phenols in Inflammatory Bowel Disease and Irritable Bowel Syndrome: A Review. Molecules 2021; 26:1843. [PMID: 33805938 PMCID: PMC8036772 DOI: 10.3390/molecules26071843] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 03/22/2021] [Accepted: 03/23/2021] [Indexed: 12/12/2022] Open
Abstract
(Poly)phenols (PPs) may have a therapeutic benefit in gastrointestinal (GI) disorders, such as irritable bowel syndrome (IBS) or inflammatory bowel disease (IBD). The aim of this review is to summarise the evidence-base in this regard. Observational evidence does not give a clear indication that PP intake has a preventative role for IBD or IBS, while interventional studies suggest these compounds may confer symptomatic and health-related quality of life improvements in known patients. There are inconsistent results for effects on markers of inflammation, but there are promising reports of endoscopic improvement. Work on the effects of PPs on intestinal permeability and oxidative stress is limited and therefore conclusions cannot be formed. Future work on the use of PPs in IBD and IBS will strengthen the understanding of clinical and mechanistic effects.
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Affiliation(s)
- Marilyn Hagan
- Department of Nutrition and Dietetics, Royal Papworth Hospital NHS Foundation Trust, Cambridge CB2 0AY, UK;
| | - Bu' Hussain Hayee
- Department of Gastroenterology, King’s College Hospital NHS Foundation Trust, London SE5 9RS, UK;
| | - Ana Rodriguez-Mateos
- Department of Nutritional Sciences, Faculty of Life Sciences and Medicine, King’s College London, London WC2R 2LS, UK
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Mitchell CJ, Howarth GS, Chartier LC, Trinder D, Lawrance IC, Huang LS, Mashtoub S. Orally administered emu oil attenuates disease in a mouse model of Crohn's-like colitis. Exp Biol Med (Maywood) 2020; 245:1697-1707. [PMID: 32903038 PMCID: PMC7802385 DOI: 10.1177/1535370220951105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 07/28/2020] [Indexed: 12/13/2022] Open
Abstract
Crohn's disease is a severe, incurable inflammatory bowel disease. Orally administered emu oil has demonstrated anti-inflammatory properties in previous models of gastrointestinal disease. We aimed to determine whether orally administered emu oil could attenuate disease in a mouse model of Crohn's-like colitis. Female ARC(s) mice (CD-1 equivalent, n = 10/group) were intra-rectally administered water (120 μL) or trinitrobenzene sulfonic acid (TNBS; 3 mg in 50% ethanol; 120 μL bolus) on day 0. Mice were orally administered water (80 μL) or emu oil (80 μL or 160 μL) daily for five days and euthanized on day six. Bodyweight and disease activity were recorded daily. Colonoscopy, burrowing activity, facial grimace, histological parameters (damage severity, small intestinal villus height/crypt depth and colonic crypt depth), myeloperoxidase activity and intestinal permeability were assessed. P < 0.05 was considered statistically significant. TNBS decreased bodyweight (days 1, 2, 4; P < 0.05) and increased disease activity (days 1-6; P < 0.01), compared to normal controls. Emu oil (80 μL) attenuated disease activity on days 5-6 (P < 0.05), although bodyweight loss was not significantly impacted (P > 0.05). Facial grimace and colonoscopy scores were significantly increased in TNBS-control mice; effects attenuated by both volumes of emu oil (P < 0.001). TNBS increased histological damage severity compared to normal controls (P < 0.05); an effect attenuated by 80 μL emu oil (proximal and distal colon; P < 0.05) and 160 μL emu oil (distal colon; P < 0.01). In the ileum, villus height and crypt depth were unaffected by TNBS or emu oil treatment compared to normal (P > 0.05). TNBS-induced distal colonic crypt lengthening was unaffected following emu oil administration (P > 0.05). Remaining parameters, including burrowing, myeloperoxidase activity and intestinal permeability, were unchanged across all treatment groups (P > 0.05). In normal mice, emu oil treatment did not significantly impact any parameter compared to normal controls. In conclusion, emu oil reduced overall disease severity and facial grimace scores in TNBS mice. These results suggest therapeutic potential for orally administered emu oil in the management of Crohn's disease.
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Affiliation(s)
- Chloe J Mitchell
- Gastroenterology Department, Women’s and Children’s Hospital, North Adelaide, South Australia 5006, Australia
- School of Animal and Veterinary Sciences, University of Adelaide, Roseworthy, South Australia 5371, Australia
| | - Gordon S Howarth
- Gastroenterology Department, Women’s and Children’s Hospital, North Adelaide, South Australia 5006, Australia
- School of Animal and Veterinary Sciences, University of Adelaide, Roseworthy, South Australia 5371, Australia
- Adelaide Medical School, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Lauren C Chartier
- Gastroenterology Department, Women’s and Children’s Hospital, North Adelaide, South Australia 5006, Australia
- Adelaide Medical School, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Debbie Trinder
- School of Medicine, University of Western Australia, Murdoch, Western Australia 6150, Australia
- Harry Perkins Institute of Medical Research, Murdoch, Western Australia 6150, Australia
| | - Ian C Lawrance
- School of Medicine, University of Western Australia, Murdoch, Western Australia 6150, Australia
- Saint John of God Hospital, Centre for Inflammatory Bowel Disease, Subiaco, Western Australia 6008, Australia
| | - Li San Huang
- School of Animal and Veterinary Sciences, University of Adelaide, Roseworthy, South Australia 5371, Australia
| | - Suzanne Mashtoub
- Gastroenterology Department, Women’s and Children’s Hospital, North Adelaide, South Australia 5006, Australia
- Adelaide Medical School, University of Adelaide, Adelaide, South Australia 5005, Australia
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Karl JP, Armstrong NJ, McClung HL, Player RA, Rood JC, Racicot K, Soares JW, Montain SJ. A diet of U.S. military food rations alters gut microbiota composition and does not increase intestinal permeability. J Nutr Biochem 2019; 72:108217. [PMID: 31473505 DOI: 10.1016/j.jnutbio.2019.108217] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Accepted: 07/22/2019] [Indexed: 12/24/2022]
Abstract
Interactions between gut microbes and dietary components modulate intestinal permeability (IP) and inflammation. Recent studies have reported altered fecal microbiota composition together with increased IP and inflammation in individuals consuming military food rations in austere environments, but could not isolate effects of the diet from environmental factors. To determine how the U.S. Meal, Ready-to-Eat food ration affects fecal microbiota composition, IP and inflammation, 60 adults (95% male,18-61 years) were randomized to consume their usual ad libitum diet for 31 days (CON) or a strictly controlled Meal, Ready-to-Eat-only diet for 21 days followed by their usual diet for 10 days (MRE). In both groups, fecal microbiota composition was measured before, during (INT, days 1-21) and after the intervention period. IP and inflammation [high-sensitivity C-reactive protein (hsCRP)] were measured on days 0, 10, 21 and 31. Longitudinal changes in fecal microbiota composition differed between groups (P=.005), and fecal samples collected from MRE during INT were identified with 88% accuracy using random forest models. The genera making the strongest contribution to that prediction accuracy included multiple lactic acid bacteria (Lactobacillus, Lactococcus, Leuconostoc), which demonstrated lower relative abundance in MRE, and several genera known to dominate the ileal microbiota (Streptococcus, Veillonella, Clostridium), the latter two demonstrating higher relative abundance in MRE. IP and hsCRP were both lower (34% and 41%, respectively) in MRE relative to CON on day 21 (P<.05) but did not differ otherwise. Findings demonstrate that a Meal, Ready-to-Eat ration diet alters fecal microbiota composition and does not increase IP or inflammation.
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Affiliation(s)
- J Philip Karl
- Military Nutrition Division, U.S. Army Research Institute of Environmental Medicine, 10 General Greene Ave, Natick, MA 01760, USA.
| | - Nicholes J Armstrong
- Military Nutrition Division, U.S. Army Research Institute of Environmental Medicine, 10 General Greene Ave, Natick, MA 01760, USA.
| | - Holly L McClung
- Military Nutrition Division, U.S. Army Research Institute of Environmental Medicine, 10 General Greene Ave, Natick, MA 01760, USA.
| | - Robert A Player
- Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Rd, Laurel, MD 20723, USA.
| | - Jennifer C Rood
- Pennington Biomedical Research Center, 6400 Perkins Rd, Baton Rouge, LA 70808, USA.
| | - Kenneth Racicot
- Combat Feeding Directorate, U.S. Army Combat Capabilities Development Command-Soldier Center, 15 General Greene Ave, Natick, MA 01760, USA.
| | - Jason W Soares
- Soldier Performance Optimization Directorate, U.S. Army Combat Capabilities Development Command-Soldier Center, 15 General Greene Ave, Natick, MA 01760, USA.
| | - Scott J Montain
- Military Nutrition Division, U.S. Army Research Institute of Environmental Medicine, 10 General Greene Ave, Natick, MA 01760, USA.
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Shiba S, Maruyama R, Kamata T, Kato D, Niwa O. Chromatographic Determination of Sugar Probes Used for Gastrointestinal Permeability Test by Employing Nickel-Copper Nanoalloy Embedded in Carbon Film Electrodes. ELECTROANAL 2018. [DOI: 10.1002/elan.201800072] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Shunsuke Shiba
- Advanced Science Research Laboratory; Saitama Institute of Technology, Fusaiji, 1690, Fukaya; Saitama 369-0293 Japan
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Higashi, Tsukuba; Ibaraki 305-8566 Japan
- Graduate School of Pure and Applied Sciences; University of Tsukuba, 1-1-1 Tennodai, Tsukuba; Ibaraki 305-8573 Japan
| | - Rina Maruyama
- Advanced Science Research Laboratory; Saitama Institute of Technology, Fusaiji, 1690, Fukaya; Saitama 369-0293 Japan
| | - Tomoyuki Kamata
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Higashi, Tsukuba; Ibaraki 305-8566 Japan
| | - Dai Kato
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Higashi, Tsukuba; Ibaraki 305-8566 Japan
| | - Osamu Niwa
- Advanced Science Research Laboratory; Saitama Institute of Technology, Fusaiji, 1690, Fukaya; Saitama 369-0293 Japan
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Karl JP, Margolis LM, Madslien EH, Murphy NE, Castellani JW, Gundersen Y, Hoke AV, Levangie MW, Kumar R, Chakraborty N, Gautam A, Hammamieh R, Martini S, Montain SJ, Pasiakos SM. Changes in intestinal microbiota composition and metabolism coincide with increased intestinal permeability in young adults under prolonged physiological stress. Am J Physiol Gastrointest Liver Physiol 2017; 312:G559-G571. [PMID: 28336545 DOI: 10.1152/ajpgi.00066.2017] [Citation(s) in RCA: 209] [Impact Index Per Article: 29.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 03/14/2017] [Accepted: 03/17/2017] [Indexed: 02/08/2023]
Abstract
The magnitude, temporal dynamics, and physiological effects of intestinal microbiome responses to physiological stress are poorly characterized. This study used a systems biology approach and a multiple-stressor military training environment to determine the effects of physiological stress on intestinal microbiota composition and metabolic activity, as well as intestinal permeability (IP). Soldiers (n = 73) were provided three rations per day with or without protein- or carbohydrate-based supplements during a 4-day cross-country ski-march (STRESS). IP was measured before and during STRESS. Blood and stool samples were collected before and after STRESS to measure inflammation, stool microbiota, and stool and plasma global metabolite profiles. IP increased 62 ± 57% (mean ± SD, P < 0.001) during STRESS independent of diet group and was associated with increased inflammation. Intestinal microbiota responses were characterized by increased α-diversity and changes in the relative abundance of >50% of identified genera, including increased abundance of less dominant taxa at the expense of more dominant taxa such as Bacteroides Changes in intestinal microbiota composition were linked to 23% of metabolites that were significantly altered in stool after STRESS. Together, pre-STRESS Actinobacteria relative abundance and changes in serum IL-6 and stool cysteine concentrations accounted for 84% of the variability in the change in IP. Findings demonstrate that a multiple-stressor military training environment induced increases in IP that were associated with alterations in markers of inflammation and with intestinal microbiota composition and metabolism. Associations between IP, the pre-STRESS microbiota, and microbiota metabolites suggest that targeting the intestinal microbiota could provide novel strategies for preserving IP during physiological stress.NEW & NOTEWORTHY Military training, a unique model for studying temporal dynamics of intestinal barrier and intestinal microbiota responses to stress, resulted in increased intestinal permeability concomitant with changes in intestinal microbiota composition and metabolism. Prestress intestinal microbiota composition and changes in fecal concentrations of metabolites linked to the microbiota were associated with increased intestinal permeability. Findings suggest that targeting the intestinal microbiota could provide novel strategies for mitigating increases in intestinal permeability during stress.
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Affiliation(s)
- J Philip Karl
- Military Nutrition Division, United States Army Research Institute of Environmental Medicine, Natick, Massachusetts;
| | - Lee M Margolis
- Military Nutrition Division, United States Army Research Institute of Environmental Medicine, Natick, Massachusetts
| | | | - Nancy E Murphy
- Military Nutrition Division, United States Army Research Institute of Environmental Medicine, Natick, Massachusetts
| | - John W Castellani
- Thermal and Mountain Medicine Division, United States Army Research Institute of Environmental Medicine, Natick, Massachusetts
| | | | - Allison V Hoke
- United States Army Center for Environmental Health Research, Fort Detrick, Maryland.,Geneva Foundation, Fort Detrick, Maryland; and
| | - Michael W Levangie
- United States Army Center for Environmental Health Research, Fort Detrick, Maryland.,Geneva Foundation, Fort Detrick, Maryland; and
| | - Raina Kumar
- Frederick National Laboratory for Cancer Research, Frederick, Maryland
| | - Nabarun Chakraborty
- United States Army Center for Environmental Health Research, Fort Detrick, Maryland.,Geneva Foundation, Fort Detrick, Maryland; and
| | - Aarti Gautam
- United States Army Center for Environmental Health Research, Fort Detrick, Maryland
| | - Rasha Hammamieh
- United States Army Center for Environmental Health Research, Fort Detrick, Maryland
| | - Svein Martini
- Norwegian Defense Research Establishment, Kjeller, Norway
| | - Scott J Montain
- Military Nutrition Division, United States Army Research Institute of Environmental Medicine, Natick, Massachusetts
| | - Stefan M Pasiakos
- Military Nutrition Division, United States Army Research Institute of Environmental Medicine, Natick, Massachusetts
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AlDeeb OAA, Mahgoub H, Foda NH. Sucralose. PROFILES OF DRUG SUBSTANCES, EXCIPIENTS, AND RELATED METHODOLOGY 2013; 38:423-462. [PMID: 23668410 DOI: 10.1016/b978-0-12-407691-4.00010-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Sucralose is a nonnutritive, zero-calorie artificial sweetener. It is a chlorinated sugar substitute that is about 600 times as sweet as sucrose. It is produced from sucrose when three chlorine atoms replace three hydroxyl groups. It is consumed as tablets (Blendy) by diabetic and obese patients. It is also used as an excipient in drug manufacturing. Unlike other artificial sweeteners, it is stable when heated and can, therefore, be used in baked and fried foods. The FDA approved sucralose in 1998. This review presents a comprehensive profile for sucralose including physical, analytical, and ADME profiles and methods of its synthesis. Spectral data for X-ray powder diffraction and DSC of sucralose are recorded and presented. The authors also recorded FT-IR, (1)H- and (13)C NMR, and ESI-MS spectra. Interpretation with detailed spectral assignments is provided. The analytical profile of sucralose covered the compendial methods, spectroscopic, and different chromatographic analytical techniques. The ADME profile covered all absorption, distribution, metabolism, and elimination data in addition to pharmacokinetics and pharmacological effects of sucralose. Some nutritional aspects for sucralose in obesity and diabetes are also presented. Both chemical and microbiological synthesis schemes for sucralose are reviewed and included.
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Affiliation(s)
- Omar A A AlDeeb
- Department of Pharmaceutical Chemistry, Hail University, Hail, Saudi Arabia
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