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Naimi RM, Hvistendahl MK, Poulsen SS, Kissow H, Pedersen J, Nerup NA, Ambrus R, Achiam MP, Svendsen LB, Jeppesen PB. Effects of glepaglutide, a long-acting glucagon-like peptide-2 analog, on intestinal morphology and perfusion in patients with short bowel syndrome: Findings from a randomized phase 2 trial. JPEN J Parenter Enteral Nutr 2023; 47:140-150. [PMID: 35511704 PMCID: PMC10084040 DOI: 10.1002/jpen.2389] [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: 03/08/2022] [Revised: 04/18/2022] [Accepted: 05/02/2022] [Indexed: 01/11/2023]
Abstract
BACKGROUND The proadaptive effects of glucagon-like peptide-2 (GLP-2) include stimulation of intestinal mucosal growth as well as intestinal blood flow and angiogenesis. We have recently reported that daily subcutaneous injections of glepaglutide, a long-acting GLP-2 analog, improved intestinal absorptive function in patients with short bowel syndrome (SBS). As secondary and exploratory end points, the effects of glepaglutide on intestinal morphology and perfusion are reported. METHODS The following assessments were done in 18 patients with SBS in a randomized, crossover, dose-finding, phase 2 trial before and after three weeks of treatment with glepaglutide: plasma citrulline and mucosa biopsies to assess changes in (1) intestinal morphology by immunohistochemistry and (2) gene expressions associated with absorption, proliferation, and markers of tight-junction integrity by quantitative polymerase chain reaction. Intestinal perfusion was assessed in stoma nipples by laser speckle contrast imaging and quantitative fluorescence angiography with indocyanine green. RESULTS In the 1- and 10-mg dose groups, glepaglutide significantly increased plasma citrulline by 15.3 µmol/L (P = 0.001) and 15.6 µmol/L (P = 0.001), respectively. Trends toward an increase in villus height, crypt depth, and epithelium height were seen in the same groups. No significant changes were seen in gene expressions or intestinal perfusion. CONCLUSION The increase in plasma citrulline and the morphological improvements may partly account for improvement in the intestinal absorptive function. However, the finding of a stability in perfusion after three weeks of treatment with glepaglutide may have been preceded by a more profound acute-phase increase in intestinal perfusion at treatment initiation.
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Affiliation(s)
- Rahim M Naimi
- Department of Intestinal Failure and Liver Diseases, Rigshospitalet, Copenhagen, Denmark
| | - Mark K Hvistendahl
- Department of Intestinal Failure and Liver Diseases, Rigshospitalet, Copenhagen, Denmark
| | - Steen S Poulsen
- Department of Biomedical Sciences, The Panum Institute, University of Copenhagen, Copenhagen, Denmark
| | - Hannelouise Kissow
- NNF Center of Basic Metabolic Research and Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jens Pedersen
- NNF Center of Basic Metabolic Research and Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Nikolaj A Nerup
- Department of Surgical Gastroenterology, Rigshospitalet, Copenhagen, Denmark
| | - Rikard Ambrus
- Department of Surgical Gastroenterology, Rigshospitalet, Copenhagen, Denmark
| | - Michael P Achiam
- Department of Surgical Gastroenterology, Rigshospitalet, Copenhagen, Denmark
| | - Lars B Svendsen
- Department of Surgical Gastroenterology, Rigshospitalet, Copenhagen, Denmark
| | - Palle B Jeppesen
- Department of Intestinal Failure and Liver Diseases, Rigshospitalet, Copenhagen, Denmark
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2
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Gao Y, Ma X, Zhou Y, Li Y, Xiang D. Dietary supplementation of squalene increases the growth performance of early-weaned piglets by improving gut microbiota, intestinal barrier, and blood antioxidant capacity. Front Vet Sci 2022; 9:995548. [PMID: 36406080 PMCID: PMC9669083 DOI: 10.3389/fvets.2022.995548] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 10/12/2022] [Indexed: 11/06/2022] Open
Abstract
This study aimed to investigate the effects of dietary squalene (SQ) supplementation on the growth performance of early-weaned piglets. Twenty early-weaned piglets were randomly divided into two groups, the squalene group (SQ) and the control group (CON). The CON group was fed a basal diet, and the SQ group was fed a basal diet with 250 mg/kg squalene. The feeding period lasted 21 days. The results showed that SQ significantly increased the final body weight (FWB, P < 0.05), average daily gain (ADG, P < 0.05), and average daily feed intake (ADFI, P < 0.05) and significantly decreased the F/G ratio (feed intake/gain, P < 0.05) and diarrhea index (DI, P < 0.05). In terms of blood biochemical indicators, SQ significantly increased anti-inflammatory factors such as transforming growth factor-β (TGF-β, P < 0.001), interleukin-10 (IL-10, P < 0.001), and interferon-γ (IFN-γ, P < 0.01), and decreased pro-inflammatory factors such as tumor necrosis factor-α (TFN-α, P < 0.001) and interleukin-6 (IL-6, P < 0.001). Furthermore, SQ significantly increased blood antioxidant indexes (P < 0.001) such as superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), catalase (CAT), and total antioxidant capacity (T-AOC) and significantly decreased the level of malondialdehyde (MDA) (P < 0.001). The villus height (P < 0.001) and V/C ratio (villus height/crypt depth, P < 0.001) of the jejunum were significantly increased in the SQ group, while the crypt depth (P < 0.01) was decreased compared to the CON group. The intestinal permeability indexes, namely diamine oxidase (DAO), D-lactic acid (D-Lac), regenerative insulin-derived protein 3 (REG-3), and FITC-Dextran 4 (FD4), significantly decreased the concentrations in the treatment group (P < 0.001), and the antioxidant indexes of the jejunum, such as SOD, GSH-Px, CAT, and MDA, were improved by adding SQ. The qPCR results showed that adding SQ could significantly increase the mRNA expression of jejunal tight-junction proteins, such as zonula occludens-1 (ZO-1, P < 0.001), Occludin (P < 0.001), Claudin (P < 0.001), glucagon-like peptide-2 (GLP-2, P < 0.001), and insulin-like growth factor-1 (IGF-1, P < 0.001). Then, we used Western blotting experiments to further confirm the qPCR results. In addition, it was found that adding SQ increased the abundance of beneficial bacteria such as Gemmiger (P < 0.01) and decreased the abundance of harmful bacteria such as Alloprevotella (P < 0.05), Desulfovibrio (P < 0.05), and Barnesiella (P < 0.05). It was interesting that there was a very close correlation among the fecal microbes, growth performance parameters, intestinal barrier, and blood biochemical indicators. In conclusion, the data suggest that SQ supplementation could effectively improve the growth performance of early-weaned piglets by improving the gut microbiota, intestinal barrier, and antioxidant capacity of the blood and jejunal mucosa.
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Affiliation(s)
- Yang Gao
- College of Life Science, Baicheng Normal University, Baicheng, China
- *Correspondence: Yang Gao
| | - Xue Ma
- College of Life Science, Baicheng Normal University, Baicheng, China
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Yingqing Zhou
- College of Life Science, Baicheng Normal University, Baicheng, China
| | - Yongqiang Li
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Dong Xiang
- Muyuan Joint Stock Company, Nanyang, China
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3
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Lei Z, Chen L, Hu Q, Yang Y, Tong F, Li K, Lin T, Nie Y, Rong H, Yu S, Song Q, Guo J. Ginsenoside Rb1 improves intestinal aging via regulating the expression of sirtuins in the intestinal epithelium and modulating the gut microbiota of mice. Front Pharmacol 2022; 13:991597. [PMID: 36238549 PMCID: PMC9552198 DOI: 10.3389/fphar.2022.991597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 09/07/2022] [Indexed: 11/29/2022] Open
Abstract
Intestinal aging seriously affects the absorption of nutrients of the aged people. Ginsenoside Rb1 (GRb1) which has multiple functions on treating gastrointestinal disorders is one of the important ingredients from Ginseng, the famous herb in tradition Chinese medicine. However, it is still unclear if GRb1 could improve intestinal aging. To investigate the function and mechanism of GRb1 on improving intestinal aging, GRb1 was administrated to 104-week-old C57BL/6 mice for 6 weeks. The jejunum, colon and feces were collected for morphology, histology, gene expression and gut microbiota tests using H&E staining, X-gal staining, qPCR, Western blot, immunofluorescence staining, and 16S rDNA sequencing technologies. The numbers of cells reduced and the accumulation of senescent cells increased in the intestinal crypts of old mice, and administration of GRb1 could reverse them. The protein levels of CLDN 2, 3, 7, and 15 were all decreased in the jejunum of old mice, and administration of GRb1 could significantly increase them. The expression levels of Tert, Lgr5, mKi67, and c-Myc were all significantly reduced in the small intestines of old mice, and GRb1 significantly increased them at transcriptional or posttranscriptional levels. The protein levels of SIRT1, SIRT3, and SIRT6 were all reduced in the jejunum of old mice, and GRb1 could increase the protein levels of them. The 16S rDNA sequencing results demonstrated the dysbiosis of the gut microbiota of old mice, and GRb1 changed the composition and functions of the gut microbiota in the old mice. In conclusion, GRb1 could improve the intestinal aging via regulating the expression of Sirtuins family and modulating the gut microbiota in the aged mice.
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Affiliation(s)
- Zili Lei
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Guangdong Pharmaceutical University, Guangzhou, China
- *Correspondence: Zili Lei, , Jiao Guo,
| | - Lei Chen
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Qing Hu
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Yanhong Yang
- The First Affiliated Hospital (School of Clinical Medicine), Guangdong Pharmaceutical University, Guangzhou, China
| | - Fengxue Tong
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Keying Li
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Ting Lin
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Ya Nie
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Guangdong Pharmaceutical University, Guangzhou, China
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou Higher Education Mega Center, Guangzhou, China
| | - Hedong Rong
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Guangdong Pharmaceutical University, Guangzhou, China
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou Higher Education Mega Center, Guangzhou, China
| | - Siping Yu
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Guangdong Pharmaceutical University, Guangzhou, China
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou Higher Education Mega Center, Guangzhou, China
| | - Qi Song
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Jiao Guo
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Guangdong Pharmaceutical University, Guangzhou, China
- *Correspondence: Zili Lei, , Jiao Guo,
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4
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Integrated analysis of dysregulated microRNA and mRNA expression in intestinal epithelial cells following ethanol intoxication and burn injury. Sci Rep 2021; 11:20213. [PMID: 34642361 PMCID: PMC8510995 DOI: 10.1038/s41598-021-99281-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 09/14/2021] [Indexed: 02/06/2023] Open
Abstract
Gut barrier dysfunction is often implicated in pathology following alcohol intoxication and burn injury. MicroRNAs (miRNAs) are negative regulators of gene expression that play a central role in gut homeostasis, although their role after alcohol and burn injury is poorly understood. We performed an integrated analysis of miRNA and RNA sequencing data to identify a network of interactions within small intestinal epithelial cells (IECs) which could promote gut barrier disruption. Mice were gavaged with ~ 2.9 g/kg ethanol and four hours later given a ~ 12.5% TBSA full thickness scald injury. One day later, IECs were harvested and total RNA extracted for RNA-seq and miRNA-seq. RNA sequencing showed 712 differentially expressed genes (DEGs) (padj < 0.05) in IECs following alcohol and burn injury. Furthermore, miRNA sequencing revealed 17 differentially expressed miRNAs (DEMs) (padj < 0.1). Utilizing the miRNet, miRDB and TargetScan databases, we identified both validated and predicted miRNA gene targets. Integration of small RNA sequencing data with mRNA sequencing results identified correlated changes in miRNA and target expression. Upregulated miRNAs were associated with decreased proliferation (miR-98-3p and miR-381-3p) and cellular adhesion (miR-29a-3p, miR-429-3p and miR3535), while downregulated miRNAs were connected to upregulation of apoptosis (Let-7d-5p and miR-130b-5p) and metabolism (miR-674-3p and miR-185-5p). Overall, these findings suggest that alcohol and burn injury significantly alters the mRNA and miRNA expression profile of IECs and reveals numerous miRNA–mRNA interactions that regulate critical pathways for gut barrier function after alcohol and burn injury.
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5
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McCarty MF, Lerner A. Perspective: Prospects for Nutraceutical Support of Intestinal Barrier Function. Adv Nutr 2020; 12:316-324. [PMID: 33126251 PMCID: PMC8243597 DOI: 10.1093/advances/nmaa139] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 08/28/2020] [Accepted: 09/24/2020] [Indexed: 12/12/2022] Open
Abstract
Impairment of intestinal barrier function is linked to certain pathologies and to aging, and can be a cause of bacterial infections, systemic and hepatic inflammation, food allergies, and autoimmune disorders. The formation and maintenance of intestinal tight junctions is supported by glucagon-like peptide-2 (GLP-2), which via insulin-like growth factor I activity boosts phosphoinositide 3-kinase/Akt/mammalian target of rapamycin complex 1 (PI3K/Akt/mTORC1) signaling in enterocytes. 5'-AMP-activated protein kinase (AMPK) activity as well as estrogen receptor-β (ERβ) activity are also protective in this regard. Conversely, activation of mitogen-activated protein kinases (MAPKs) and cellular Src (c-Src) under inflammatory conditions can induce dissociation of tight junctions. Hence, nutraceuticals that promote GLP-2 secretion from L cells-effective pre/probiotics, glycine, and glutamine-as well as diets rich in soluble fiber or resistant starch, can support intestinal barrier function. AMPK activators-notably berberine and the butyric acid produced by health-promoting microflora-are also beneficial in this regard, as are soy isoflavones, which function as selective agonists for ERβ. The adverse impact of MAPK and c-Src overactivation on the intestinal barrier can be combatted with various antioxidant measures, including phycocyanobilin, phase 2-inducer nutraceuticals, and N-acetylcysteine. These considerations suggest that rationally designed functional foods or complex supplementation programs could have clinical potential for supporting and restoring healthful intestinal barrier function.
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6
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Chang Y, Deng Q, Zhang Z, Zhao H, Tang J, Chen X, Liu G, Tian G, Cai J, Jia G. Glucagon-like peptide 2 attenuates intestinal mucosal barrier injury through the MLCK/pMLC signaling pathway in a piglet model. J Cell Physiol 2020; 236:3015-3032. [PMID: 32960454 DOI: 10.1002/jcp.30068] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 09/03/2020] [Accepted: 09/08/2020] [Indexed: 12/17/2022]
Abstract
Glucagon-like peptide-2 (GLP-2), an intestinotrophic hormone, has drawn considerable attention worldwide due to its potential to promote intestinal development. We investigated the effects and mechanisms of GLP-2 against lipopolysaccharide (LPS)-induced intestinal inflammation and injury both in vitro and in vivo. Forty healthy piglets weaned at the age of 28 days with similar body weight (BW) were assigned to four in vivo treatments with ten piglets each: (i) nonchallenged control; (ii) LPS-challenged control; (iii) LPS + low dose GLP-2; and (iv) LPS + high dose GLP-2. Piglets were subcutaneously injected with phosphate-buffered saline supplemented with GLP-2 at doses of 0, 0, 2, and 10 nmol/kg BW per day for seven consecutive days. The piglets were challenged with an intraperitoneal injection with 100 μg/kg LPS on day 14 to induce intestinal damage. After that, the gene and protein expression levels of representative tight junction proteins and myosin light-chain kinase (MLCK)/phosphorylated myosin light chain (pMLC), as well as proinflammatory cytokine levels were determined using quantitative reverse transcription polymerase chain reaction, western blot, and enzyme-linked immunosorbent assay methods. A high dose of GLP-2 pretreatment increased intestinal permeability by downregulating and redistributing tight junction proteins (p < .05), for example, zona occluden-1 (ZO-1) and occludin. GLP-2 decreased the transcription of proinflammatory cytokines genes including interleukin-1β (IL-1β), IL-6, IL-8, and tumor necrosis factor-α in small intestines (p < .05). GLP-2 prevented the LPS-induced increase in the expression of MLCK dose-dependently and the increase in pMLC levels in the duodenum, jejunum, and ileum. To assess further the protective effect of GLP-2 on LPS-induced intestinal barrier injury after weaning and its possible mechanism, an in vitro intestinal epithelial barrier model was established with IPEC-J2 monolayers and treated with 100 μg/ml LPS with or without 1 × 10-8 mol/L GLP-2 pretreatment. The in vitro analysis included control, LPS, and GLP-2 + LPS treatments. GLP-2 treatment alleviated the destructive effect of LPS on barrier permeability by restoring the expression and ultrastructure of ZO-1 and occludin (p < .05). In addition, GLP-2 reversed the LPS-induced MLCK hyperexpression and pMLC hyperphosphorylation (p < .05). Taken together, our findings revealed a mechanism by which GLP-2 alleviated LPS-challenged intestinal barrier injury and inflammation in weaned piglets and IPEC-J2 cells via the MLCK/pMLC signaling pathway.
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Affiliation(s)
- Yaqi Chang
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan, China.,Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, China
| | - Qiuhong Deng
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan, China.,Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, China
| | - Zhenyu Zhang
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan, China.,Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, China.,Meishan Vocational Technical College, Meishan, China
| | - Hua Zhao
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan, China.,Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, China
| | - Jiayong Tang
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan, China.,Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, China
| | - Xiaoling Chen
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan, China.,Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, China
| | - Guangmang Liu
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan, China.,Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, China
| | - Gang Tian
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan, China.,Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, China
| | - Jingyi Cai
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan, China.,Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, China
| | - Gang Jia
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan, China.,Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, China
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7
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Intestinal stem cells heterogeneity and clonal dominance during aging: two faces of the same coin? Mech Ageing Dev 2020; 189:111247. [PMID: 32505859 DOI: 10.1016/j.mad.2020.111247] [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: 01/23/2020] [Revised: 04/03/2020] [Accepted: 04/05/2020] [Indexed: 11/20/2022]
Abstract
Intestinal epithelium undergoes dysfunctions and diseases over time with an exponential increase in the elderly population. Recent studies reported that the intestinal stem cells (ISCs) show a functional decline during aging and a lack of an appropriate cell identity control. Increase of cell-to-cell heterogeneity is a hallmark of aging tissues and organs, however there is little experimental evidence with regard to the cell heterogeneity of the ISCs. On the other hand, the ISCs continuously experience a niche clonality process that diminishes the initial cell heterogeneity over time. In this review, we discuss the latest findings on these topics focusing on the potential mechanisms driving intestinal stem cell heterogeneity and clonality during aging.
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Moran A, Al-Rammahi MA, Daly K, Grand E, Ionescu C, Bravo DM, Wall EH, Shirazi-Beechey SP. Consumption of a Natural High-Intensity Sweetener Enhances Activity and Expression of Rabbit Intestinal Na +/Glucose Cotransporter 1 (SGLT1) and Improves Colibacillosis-Induced Enteric Disorders. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:441-450. [PMID: 31736308 PMCID: PMC7007240 DOI: 10.1021/acs.jafc.9b04995] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 11/14/2019] [Accepted: 11/16/2019] [Indexed: 06/10/2023]
Abstract
Absorption of glucose, via intestinal Na+/glucose cotransporter 1 (SGLT1), activates salt and water absorption and is an effective route for treating Escherichia coli (E. coli)-induced diarrhea. Activity and expression of SGLT1 is regulated by sensing of sugars and artificial/natural sweeteners by the intestinal sweet receptor T1R2-T1R3 expressed in enteroendocrine cells. Diarrhea, caused by the bacterial pathogen E. coli, is the most common post-weaning clinical feature in rabbits, leading to mortality. We demonstrate here that, in rabbits with experimentally E. coli-induced diarrhea, inclusion of a supplement containing stevia leaf extract (SL) in the feed decreases cumulative morbidity, improving clinical signs of disease (p < 0.01). We show that the rabbit intestine expresses T1R2-T1R3. Furthermore, intake of SL enhances activity and expression of SGLT1 and the intestinal capacity to absorb glucose (1.8-fold increase, p < 0.05). Thus, a natural plant extract sweetener can act as an effective feed additive for lessening the negative impact of enteric diseases in animals.
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Affiliation(s)
- Andrew
W. Moran
- Epithelial
Function and Development Group, Institute of Integrative Biology, University of Liverpool, Liverpool L69 7ZB, U.K.
| | - Miran A. Al-Rammahi
- Epithelial
Function and Development Group, Institute of Integrative Biology, University of Liverpool, Liverpool L69 7ZB, U.K.
- Zoonotic
Disease Research Unit, College of Veterinary Medicine, University of Al-Qadisiyah, Al-Diwaniyah 58002, Iraq
| | - Kristian Daly
- Epithelial
Function and Development Group, Institute of Integrative Biology, University of Liverpool, Liverpool L69 7ZB, U.K.
| | | | | | | | - Emma H. Wall
- Pancosma/ADM, Z. A. La Pièce 3, 1180 Rolle, Switzerland
| | - Soraya P. Shirazi-Beechey
- Epithelial
Function and Development Group, Institute of Integrative Biology, University of Liverpool, Liverpool L69 7ZB, U.K.
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Sueyoshi R, Miyahara K, Nakazawa-Tanaka N, Fujiwara N, Ochi T, Yamataka A. DPP4 inhibitor reinforces cell junction proteins in mouse model of short bowel syndrome. Pediatr Surg Int 2020; 36:49-55. [PMID: 31576468 DOI: 10.1007/s00383-019-04571-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/12/2019] [Indexed: 11/25/2022]
Abstract
PURPOSE Bacterial overgrowth commonly occurs and favors bacterial translocation in short bowel syndrome (SBS). Glucagon-like peptide-2 (GLP-2) is effective for treating SBS, but is rapidly inactivated by dipeptidyl peptidase IV (DPP4). DPP4 inhibitor (DPP4I) is known to be effective for treating SBS. Here, we investigated cell junction protein function following DPP4I administration in a mouse model of SBS. METHODS Mice were divided into four groups: naïve (n = 5), naïve + DPP4I (n = 6), control (n = 6), and DPP4I (n = 5). All control and DPP4I mice had 50% of their proximal small bowel resected. DPP4I or normal saline was administered orally twice daily from days 1-7 postoperatively. The functions of cell junction proteins were assessed by RT-PCR and immunohistochemistry. Body weights and blood glucose levels were recorded. RESULTS E-Cadherin was significantly higher in the DPP4I group than in the control group. E-Cadherin, occludin, and claudin-4 were significantly higher in the naïve group than in the control group. Positive staining for E-cadherin and occludin varied widely between the control and DPP4I groups. CONCLUSION Up-regulation of E-cadherin and occludin by DPP4I may be correlated with the anti-inflammatory action of DPP4I. Therefore, DPP4I may reduce bacterial translocation in SBS.
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Affiliation(s)
- Ryo Sueyoshi
- Department of Pediatric General and Urogenital Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan. .,Department of Pediatric Surgery, Tokyo Women's Medical University, Tokyo, Japan.
| | - Katsumi Miyahara
- Department of Pediatric General and Urogenital Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Nana Nakazawa-Tanaka
- Department of Pediatric General and Urogenital Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Naho Fujiwara
- Department of Pediatric General and Urogenital Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Takanori Ochi
- Department of Pediatric General and Urogenital Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Atsuyuki Yamataka
- Department of Pediatric General and Urogenital Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
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10
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Xu B, He Y, Lu Y, Ren W, Shen J, Wu K, Xu K, Wu J, Hu Y. Glucagon like peptide 2 has a positive impact on osteoporosis in ovariectomized rats. Life Sci 2019; 226:47-56. [PMID: 30959027 DOI: 10.1016/j.lfs.2019.04.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Revised: 04/03/2019] [Accepted: 04/03/2019] [Indexed: 01/01/2023]
Abstract
AIMS In this study, we evaluate the effects of glucagon-like peptide 2 (GLP-2) on bone microarchitecture, bone turnover markers (BTMs) and inflammation markers in ovariectomized (OVX) rats. MATERIAL AND METHODS In total, 31 Sprague-Dawley rats were divided into the following three groups: sham (control sham-operated with vehicle, n = 7), OV (OVX with vehicle, n = 12), and GLP-2 (OVX with GLP-2, n = 12). Intervention began at the 12th week after surgery and lasted for 4 weeks. The dosage of the GLP-2 was 160 μg/kg/d through subcutaneous injections, and normal saline was used as the vehicle agent. After 4 weeks of treatment, serum BTM and inflammation marker levels were measured by ELISA, and femora samples were analyzed by qRT-PCR, micro-CT, histology and histomorphometry. KEY FINDINGS After 4 weeks of treatment, serum TRAcP-5b and RANKL levels as well as the CTX-1/P1NP ratio in the GLP-2 group decreased, and ALP activity, P1NP level, and OPG/RANKL ratio increased significantly; qRT-PCR analysis showed that mRNA levels of RANKL decreased, and Runx2, ALP, and Col-1 levels as well as the OPG/RANKL ratio increased significantly in the GLP-2 group compared with the OV group. In bone histology analysis, GLP-2 significantly decreased the AV/MV, Oc.N and Oc.S but increased the Ob.N, BFR and MAR. Analysis with μ-CT showed that the BMD, BV/TV, Tb.N and Conn.D increased significantly in the GLP-2 group compared with the OV group. The levels of serum inflammation markers TNF-α, IL-1β and IL-6 decreased, and TGF-β levels increased in the GLP-2 group compared with the OV group. SIGNIFICANCE GLP-2 may have a positive impact on osteoporosis by promoting bone formation, inhibiting bone resorption and decreasing circulatory inflammation in ovariectomized rats.
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Affiliation(s)
- Bing'er Xu
- Department of Geriatrics, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Yuting He
- Department of Geriatrics, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Yi Lu
- Department of Geriatrics, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Weiying Ren
- Department of Geriatrics, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Jiping Shen
- Department of Geriatrics, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Kefen Wu
- Department of Geriatrics, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Kan Xu
- Department of Geriatrics, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Jiayu Wu
- Department of Geriatrics, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Yu Hu
- Department of Geriatrics, Zhongshan Hospital, Fudan University, Shanghai 200032, China; Center for Evidence Based Medicine and Clinical Epidemiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China.
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