1
|
Liu M, Tandorost A, Moludi J, Dey P. Prebiotics Plus Probiotics May Favorably Impact on Gut Permeability, Endocannabinoid Receptors, and Inflammatory Biomarkers in Patients with Coronary Artery Diseases: A Clinical Trial. Food Sci Nutr 2024; 12:1207-1217. [PMID: 38370067 PMCID: PMC10867495 DOI: 10.1002/fsn3.3835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 09/29/2023] [Accepted: 11/04/2023] [Indexed: 02/20/2024] Open
Abstract
While gut-to-systemic translocation of pyrogenic endotoxin due to a leaky gut elicits systemic inflammation, at the intestine, the endocannabinoid system (eCB) also plays a major role in modulating the impact of gut dysbiosis on the host system. Therefore, we hypothesized that coadministration of prebiotic inulin with probiotics would improve the eCB system, gut microbial composition, and inflammatory parameters associated with coronary artery diseases (CAD). We designed a randomized, double-blind trial with 92 CAD patients. Patients were randomly allocated to receive inulin (15 mg/day), LGG capsules 1.9 × 109 colony-forming unit (CFU) or inulin plus probiotic (synbiotics) supplements, for a duration of 60 days. We assessed gut microbiota composition, expression of cannabinoid receptors (i.e., CB1 and CB2), serum levels of interleukin-6 (IL-6), toll-like receptor 4 (TLR-4), lipopolysaccharides (LPS), total antioxidant capacity (TAC), and malondialdehyde (MDA) before and after the supplementation. Probiotic-inulin cosupplementation significantly decreased IL6, LPS, and TLR-4 and increased serum TAC concentrations compared with the placebo. While CB1 receptor expression had no difference, significant differences were observed for the CB2 receptor expression among the four treatments. CB2 receptor mRNA expression significantly (p < .05) correlated with serum levels of LPS (r = -.10) and F/B ratio (r = -.407, p = .047). Our data collectively provide preliminary evidence that gut microbiota determines gut permeability through the LPS-eCB system. We also have found that synbiotics improved the eCB receptors, and inflammatory biomarkers more than either of the two supplementations given alone.
Collapse
Affiliation(s)
- Min Liu
- Department of General MedicineThe First Hospital of Shanxi Medical UniversityTaiyuanShanxiChina
| | - Arash Tandorost
- Research Center for Environmental Determinants of Health (RCEDH)Kermanshah University of Medical SciencesKermanshahIran
| | - Jalall Moludi
- Research Center for Environmental Determinants of Health (RCEDH)Kermanshah University of Medical SciencesKermanshahIran
| | - Priyankar Dey
- Department of BiotechnologyThe Institute of Engineering & TechnologyPatialaIndia
| |
Collapse
|
2
|
Lee YR, Lee HB, Oh MJ, Kim Y, Park HY. Thyme Extract Alleviates High-Fat Diet-Induced Obesity and Gut Dysfunction. Nutrients 2023; 15:5007. [PMID: 38068865 PMCID: PMC10708554 DOI: 10.3390/nu15235007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 11/24/2023] [Accepted: 12/02/2023] [Indexed: 12/18/2023] Open
Abstract
Prolonged intake of a high-fat diet (HFD) disturbs the composition of gut microbiota, contributing to the development of metabolic diseases, notably obesity and increased intestinal permeability. Thyme (Thymus vulgaris L.), an aromatic plant, is known for its several therapeutic properties. In this study, we explored the potential of thyme extract (TLE) to mitigate HFD-induced metabolic derangements and improve the gut environment. Eight-week-old C57BL/6 mice were administered 50 or 100 mg/kg TLE for eight weeks. Administration of 100 mg/kg TLE resulted in decreased weight gain and body fat percentage, alongside the regulation of serum biomarkers linked to obesity induced by a HFD. Moreover, TLE enhanced intestinal barrier function by increasing the expression of tight junction proteins and ameliorated colon shortening. TLE also altered the levels of various metabolites. Especially, when compared with a HFD, it was confirmed that 2-hydroxypalmitic acid and 3-indoleacrylic acid returned to normal levels after TLE treatment. Additionally, we investigated the correlation between fecal metabolites and metabolic parameters; deoxycholic acid displayed a positive correlation with most parameters, except for colon length. In contrast, hypoxanthine was negatively correlated with most parameters. These results suggest a promising role for thyme in ameliorating obesity and related gut conditions associated with a HFD.
Collapse
Affiliation(s)
- Yu Ra Lee
- Food Functionality Research Division, Korea Food Research Institute, Wanju-gun 55365, Republic of Korea; (Y.R.L.); (H.-B.L.); (M.-J.O.); (Y.K.)
| | - Hye-Bin Lee
- Food Functionality Research Division, Korea Food Research Institute, Wanju-gun 55365, Republic of Korea; (Y.R.L.); (H.-B.L.); (M.-J.O.); (Y.K.)
| | - Mi-Jin Oh
- Food Functionality Research Division, Korea Food Research Institute, Wanju-gun 55365, Republic of Korea; (Y.R.L.); (H.-B.L.); (M.-J.O.); (Y.K.)
| | - Yoonsook Kim
- Food Functionality Research Division, Korea Food Research Institute, Wanju-gun 55365, Republic of Korea; (Y.R.L.); (H.-B.L.); (M.-J.O.); (Y.K.)
| | - Ho-Young Park
- Food Functionality Research Division, Korea Food Research Institute, Wanju-gun 55365, Republic of Korea; (Y.R.L.); (H.-B.L.); (M.-J.O.); (Y.K.)
- Department of Food Biotechnology, Korea National University of Science and Technology, Daejeon 34113, Republic of Korea
| |
Collapse
|
3
|
Ranneh Y, Fadel A, Md Akim A, Idris I, Ilesanmi-Oyelere BL, Ismail LC. Effect of Dietary Fiber Supplementation on Metabolic Endotoxemia: A Protocol for Systematic Review and Meta-Analysis of Randomized Clinical Trials. Methods Protoc 2023; 6:84. [PMID: 37736967 PMCID: PMC10514783 DOI: 10.3390/mps6050084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 09/05/2023] [Accepted: 09/06/2023] [Indexed: 09/23/2023] Open
Abstract
Introduction: Metabolic endotoxemia (ME) is the main cause of sub-clinical chronic inflammation, which subsequently triggers the onset of several chronic diseases. However, recent reports have indicated that dietary fiber (DF) contributes significantly to ameliorating ME and inflammation. This protocol aims to provide an outline of all procedures in synthesizing the available data on the effect of DF against ME. Methods: Following the PRISMA 2020 guidelines for preparing protocols, this protocol was registered in the International Prospective Registry of Systematic Reviews (PROSPERO) with registration number (CRD42023417833). In this review, we specifically focused on the inclusion of clinical trials that met the following criteria: they were published or available as preprints, employed random, quasi-random, or cross-over designs, and were exclusively documented in the English language. Clinical medical subject headings (MeSH) as search terms were used on prominent databases such as MEDLINE, COCHRANE library, PubMed, World Health Organization International Clinical Trials Registry Platforms, and US National Institutes of Health Ongoing Trials Register Clinicaltrials.gov. Results and discussion: This protocol will guide the exploration of articles that report changes in ME biomarkers in subjects supplemented with DF. The findings of this protocol will ensure a comprehensive evaluation of available evidence, provide a quantitative summary, identify patterns and trends, enhance statistical power, and address heterogeneity, which collectively will clarify the optimal types, doses, and duration of DF interventions for managing ME and low-grade inflammation. Ethics and dissemination: The quantitative data of clinical trials will be collected, and a meta-analysis will be performed using RevMan V.5.3 software. Therefore, no ethical approval is required.
Collapse
Affiliation(s)
- Yazan Ranneh
- Department of Nutrition and Dietetics, College of Pharmacy, Al Ain University, Abu Dhabi P.O. Box 112612, United Arab Emirates
| | - Abdulmannan Fadel
- Research Institute for Sport and Exercise Sciences, School of Sport and Exercise Sciences, Liverpool John Moores University, Liverpool L3 3AF, UK;
| | - Abdah Md Akim
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang 43400, Malaysia;
| | - Iskandar Idris
- School of Medicine, University of Nottingham, Royal Derby Hospital, Derby DE22 3NE, UK;
| | | | - Leila Cheikh Ismail
- Department of Clinical Nutrition and Dietetics, University of Sharjah, Sharjah P.O. Box 72772, United Arab Emirates;
- Nuffield Department of Women’s & Reproductive Health, University of Oxford, Oxford OX3 9DU, UK
| |
Collapse
|
4
|
Yu Q, Yu F, Li Q, Zhang J, Peng Y, Wang X, Li T, Yin N, Sun G, Ouyang H, Chen Y, Mine Y, Tsao R, Zhang H. Anthocyanin-Rich Butterfly Pea Flower Extract Ameliorating Low-Grade Inflammation in a High-Fat-Diet and Lipopolysaccharide-Induced Mouse Model. J Agric Food Chem 2023; 71:11941-11956. [PMID: 37526116 DOI: 10.1021/acs.jafc.3c02696] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
This study aimed to explore the enhancive effects of butterfly pea flower (BF) extracts on metabolic and immune homeostasis in a low-grade inflammation mouse model. The BF extract was found to contain mainly anthocyanins among other flavonoids. BF supplementation alleviated metabolic endotoxemia by lowering the plasma glucose, lipopolysaccharide (LPS), and tumor necrosis factor-α (TNF-α) levels and restored lipid metabolism and the balance between Treg and Th17 cells, thereby inhibiting the dysfunctional liver and abdominal white adipose tissues. BF extract increased the tight junction protein expression and reduced the expression of proinflammatory cytokines, therefore sustaining the colonic mucosa structure. Furthermore, BF extracts reshaped the gut microbiota structure characterized by significantly promoted SCFA-producing gut microbiota such as Akkermansia and Butyricicoccaceae. Additionally, BF extracts enhanced fecal primary bile acid (BA) levels and modulated bile acid signaling in the liver and ileum to facilitate BA synthesis for the restoration of lipid metabolism. In summary, anthocyanin-enriched BF extracts alleviated the profound negative dietary alterations and helped maintain the metabolic health by modulating the various aspects of the gut microenvironment and enhancing hepatic bile acid synthesis.
Collapse
Affiliation(s)
- Qinqin Yu
- Department of Food Nutrition and Safety, College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
| | - Fengyao Yu
- Department of Food Nutrition and Safety, College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
| | - Qiong Li
- Department of Food Nutrition and Safety, College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
| | - Jie Zhang
- Department of Food Nutrition and Safety, College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
| | - You Peng
- Jiangxi Province Engineering Research Center of Ecological Chemical Industry, Jiujiang University, Jiujiang 332005, China
| | - Xiaoya Wang
- Department of Food Nutrition and Safety, College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
| | - Tao Li
- Department of Food Nutrition and Safety, College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
| | - Ning Yin
- Department of Food Nutrition and Safety, College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
| | - Genlin Sun
- Department of Food Nutrition and Safety, College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
| | - Hui Ouyang
- Department of Food Nutrition and Safety, College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
| | - Yuhuan Chen
- Department of Food Nutrition and Safety, College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
| | - Yoshinori Mine
- Department of Food Science, University of Guelph, Guelph, Ontario N1G2W1, Canada
| | - Rong Tsao
- Guelph Food Research and Development Centre, Agriculture and Agri-Food Canada, 93 Stone Road West, Guelph, Ontario N1G 5C9, Canada
| | - Hua Zhang
- Department of Food Nutrition and Safety, College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
| |
Collapse
|
5
|
Chmielarz M, Sobieszczańska B, Teisseyre A, Wawrzyńska M, Bożemska E, Środa-Pomianek K. Palmitic Acid Modulates Microglial Cell Response to Metabolic Endotoxemia in an In Vitro Study. Nutrients 2023; 15:3463. [PMID: 37571401 PMCID: PMC10421407 DOI: 10.3390/nu15153463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 08/03/2023] [Accepted: 08/03/2023] [Indexed: 08/13/2023] Open
Abstract
Metabolic endotoxemia (ME) is characterized by a 2-3-fold increase in blood endotoxin levels and low-grade systemic inflammation without apparent infection. ME is usually accompanied by metabolic syndrome, characterized by central obesity and hyperlipidemia. According to numerous studies, ME may lead to functional brain disorders, including cognitive decline, depression, and dementia. In the current in vitro study, we aimed to determine the direct and indirect impact of endotoxin (LPS) and palmitic acid (PA), representing saturated fatty acids, on the inflammatory and oxidative stress response in the human microglial HMC3 cells unstimulated and stimulated with IFNγ. The study's results revealed that direct HMC3 cell exposition to endotoxin and PA increased inflammatory response measured as levels of IL-6 and MCP-1 released into the medium and PGE2 levels in cell lysates. Moreover, direct HMC3 cell treatment with PA and LPS induced oxidative stress, i.e., ROS and COX-2 production and lipid peroxidation. On the contrary, an indirect effect of LPS and PA on microglial cells, assessed as the impact of macrophage metabolites, was much lower regarding the inflammatory response, although still associated with oxidative stress. Interestingly, IFNγ had a protective effect on microglial cells, reducing the production of pro-inflammatory mediators and oxidative stress in HMC3 cells treated directly and indirectly with LPS and PA.
Collapse
Affiliation(s)
- Mateusz Chmielarz
- Department of Microbiology, Wroclaw Medical University, 50-365 Wroclaw, Poland; (M.C.); (E.B.)
| | - Beata Sobieszczańska
- Department of Microbiology, Wroclaw Medical University, 50-365 Wroclaw, Poland; (M.C.); (E.B.)
| | - Andrzej Teisseyre
- Department of Biophysics and Neuroscience, Wroclaw Medical University, 50-365 Wroclaw, Poland; (A.T.); (K.Ś.-P.)
| | - Magdalena Wawrzyńska
- Department of Preclinical Studies, Faculty of Health Sciences, Wroclaw Medical University, 50-365 Wroclaw, Poland;
| | - Edyta Bożemska
- Department of Microbiology, Wroclaw Medical University, 50-365 Wroclaw, Poland; (M.C.); (E.B.)
| | - Kamila Środa-Pomianek
- Department of Biophysics and Neuroscience, Wroclaw Medical University, 50-365 Wroclaw, Poland; (A.T.); (K.Ś.-P.)
| |
Collapse
|
6
|
Choroszy M, Środa-Pomianek K, Wawrzyńska M, Chmielarz M, Bożemska E, Sobieszczańska B. The Role of Palmitic Acid in the Co-Toxicity of Bacterial Metabolites to Endothelial Cells. Vasc Health Risk Manag 2023; 19:399-409. [PMID: 37426328 PMCID: PMC10329449 DOI: 10.2147/vhrm.s408897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 05/18/2023] [Indexed: 07/11/2023] Open
Abstract
Introduction Metabolic endotoxemia most often results from obesity and is accompanied by an increase in the permeability of the intestinal epithelial barrier, allowing co-absorption of bacterial metabolites and diet-derived fatty acids into the bloodstream. A high-fat diet (HFD) leading to obesity is a significant extrinsic factor in developing vascular atherosclerosis. In this study, we evaluated the effects of palmitic acid (PA) as a representative of long-chain saturated fatty acids (LCSFA) commonly present in HFDs, along with endotoxin (LPS; lipopolysaccharide) and uremic toxin indoxyl sulfate (IS), on human vascular endothelial cells (HUVECs). Methods HUVECs viability was measured based on tetrazolium salt metabolism, and cell morphology was assessed with fluorescein-phalloidin staining of cells' actin cytoskeleton. The effects of simultaneous treatment of endothelial cells with PA, LPS, and IS on nitro-oxidative stress in vascular cells were evaluated quantitatively with fluorescent probes. The expression of vascular cell adhesion molecule VCAM-1, E-selectin, and occludin, an essential tight junction protein, in HUVECs treated with these metabolites was evaluated in Western blot. Results PA, combined with LPS and IS, did not influence HUVECs viability but induced stress on actin fibers and focal adhesion complexes. Moreover, PA combined with LPS significantly enhanced reactive oxygen species (ROS) production in HUVECs but decreased nitric oxide (NO) generation. PA also considerably increased the expression of VCAM-1 and E-selectin in HUVECs treated with LPS or IS but decreased occludin expression. Conclusion Palmitic acid enhances the toxic effect of metabolic endotoxemia on the vascular endothelium.
Collapse
Affiliation(s)
- Marcin Choroszy
- Department of Microbiology, Wroclaw Medical University, Wroclaw, Poland
| | - Kamila Środa-Pomianek
- Department of Biophysics and Neuroscience, Wroclaw Medical University, Wroclaw, Poland
| | - Magdalena Wawrzyńska
- Department of Preclinical Studies, Faculty of Health Sciences, Wroclaw Medical University, Wroclaw, Poland
| | - Mateusz Chmielarz
- Department of Microbiology, Wroclaw Medical University, Wroclaw, Poland
| | - Edyta Bożemska
- Department of Microbiology, Wroclaw Medical University, Wroclaw, Poland
| | | |
Collapse
|
7
|
Hasegawa Y, Pei R, Raghuvanshi R, Liu Z, Bolling BW. Yogurt Supplementation Attenuates Insulin Resistance in Obese Mice by Reducing Metabolic Endotoxemia and Inflammation. J Nutr 2023; 153:703-712. [PMID: 36774230 DOI: 10.1016/j.tjnut.2023.01.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 01/12/2023] [Accepted: 01/18/2023] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND Inflammation is an underlying mechanism for the development of obesity-related health complications. Yogurt consumption inhibits obesity-associated inflammation, but the tissue-specific mechanisms have not been adequately described. OBJECTIVES We aimed to determine the tissue-specific responses by which yogurt supplementation inhibits inflammation. METHODS C57BL/6 male mice (5 wk old) were fed a Teklad Global 14% Protein Rodent Maintenance diet as a control or a high-fat diet (60% calories from fat) to induce obesity for 11 wk, followed by feeding a Western diet (WD; 43% carbohydrate and 42% fat) or WD supplemented with 5.6% lyophilized yogurt powder for 3 wk to test for the impact of yogurt supplementation. Markers of metabolic endotoxemia and inflammation were assessed in plasma and tissues. Cecal and fecal microbiota were profiled by 16S rRNA sequencing. RESULTS In obese mice, relative to the WD control group, yogurt supplementation attenuated HOMA-IR by 57% (P = 0.020), plasma TNF-α by 31% (P < 0.05) and colonic IFN-γ by 46% (P = 0.0034), which were accompanied by a 40% reduction in plasma LPS binding protein (LBP) (P = 0.0019) and 45% less colonic Lbp expression (P = 0.037), as well as alteration in the beta diversity of cecal microbiota (P = 0.0090) and relative abundance of certain cecal microbes (e.g., Lachnospiraceae Dorea longicatena with P = 0.049). There were no differences in the LBP, Lbp, and Cd14 levels in the liver and small intestine between obese mice with and without yogurt supplementation (P > 0.05). CONCLUSIONS Yogurt consumption inhibits obesity-induced inflammation in mice by modulating colonic endotoxin detoxification, changing the gut microbiota, and improving glucose metabolism. This work helps to establish the underlying mechanisms by which yogurt consumption affects markers of metabolic and immune health.
Collapse
Affiliation(s)
- Yu Hasegawa
- Department of Food Science, University of Wisconsin-Madison, Madison, WI, USA
| | - Ruisong Pei
- Department of Food Science, University of Wisconsin-Madison, Madison, WI, USA
| | - Ruma Raghuvanshi
- Department of Food Science, University of Wisconsin-Madison, Madison, WI, USA
| | - Zhenhua Liu
- School of Public Health & Health Science, University of Massachusetts-Amherst, Amherst, MA, USA
| | - Bradley W Bolling
- Department of Food Science, University of Wisconsin-Madison, Madison, WI, USA.
| |
Collapse
|
8
|
Kahr MK, Antony KM, Galindo M, Whitham M, Hu M, Aagaard KM, Suter MA. SERUM GLP-2 is Increased in Association with Excess Gestational Weight Gain. Am J Perinatol 2023; 40:400-406. [PMID: 33940644 PMCID: PMC9970758 DOI: 10.1055/s-0041-1728828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
OBJECTIVE Obesity in pregnancy bears unique maternal and fetal risks. Obesity has also been associated with chronic inflammation, including elevated serum levels of interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α). Higher serum lipopolysaccharide (LPS) levels have been implicated in driving this inflammation, a phenomenon called metabolic endotoxemia (ME). GLP-2, a proglucagon-derived peptide, is believed to be integral in maintaining the integrity of the intestine in the face of LPS-mediated endotoxemia. We hypothesized that obesity and/or excess weight gain in pregnancy would be associated with an increase in maternal and neonatal markers of ME, as well as GLP-2. STUDY DESIGN Paired maternal and neonatal (cord blood) serum samples (n = 159) were obtained from our pregnancy biobank repository. Serum levels of LPS, endotoxin core antibody-immunoglobulin M (EndoCAb-IgM), and GLP-2 were measured by ELISA. IL-6 and TNF-α were measured using a Milliplex assay. Results were stratified by maternal body mass index (BMI), maternal diabetes, and gestational weight gain (GWG). RESULTS Maternal IL-6 is significantly decreased in the obese, diabetic cohort compared with the nonobese, nondiabetic cohorts (95.28 vs. 99.48 pg/mL, p = 0.047), whereas GLP-2 is significantly increased (1.92 vs. 2.89 ng/mL, p = 0.026). Neonatal TNF-α is significantly decreased in the obese cohort compared with the nonobese cohort (12.43 vs. 13.93 pg/mL, p = 0.044). Maternal GLP-2 is significantly increased in women with excess GWG compared with those with normal GWG (2.27 vs. 1.48 ng/mL, p = 0.014). We further found that neonatal IL-6 and TNF-α are negatively correlated with maternal BMI (-0.186, p = 0.036 and -0.179, p = 0.044, respectively) and that maternal and neonatal IL-6 showed a positive correlation (0.348, p < 0.001). CONCLUSION Although we observed altered levels of markers of inflammation (IL-6 and TNF-α) with maternal obesity and diabetes, no changes in LPS or endoCAb-IgM were observed. We hypothesize that the increased GLP-2 levels in maternal serum in association with excess GWG may protect against ME in pregnancy. KEY POINTS · Maternal serum levels of GLP-2, a proglucagon-derived peptide, are increased in obese, diabetic gravidae.. · Maternal serum GLP-2 levels are also increased in association with excess gestational weight gain compared with normal gestational weight gain.. · GLP-2 may be increased in association with obesity and weight gain to protect against metabolic endotoxemia in pregnancy..
Collapse
Affiliation(s)
- Maike K. Kahr
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas
- Department of Obstetrics and Gynecology, University Hospital Zurich, Zurich, Switzerland
| | - Kathleen M. Antony
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas
- Department of Obstetrics and Gynecology, University of Wisconsin-Madison, Madison, Wisconsin
| | - Megan Galindo
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas
| | - Megan Whitham
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas
| | - Min Hu
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas
| | - Kjersti M. Aagaard
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas
| | - Melissa A. Suter
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas
- Address for correspondence Melissa Suter, PhD Department of Obstetrics and Gynecology, Baylor College of Medicine1 Baylor Plaza, Rm. 314C, Houston, TX 77030
| |
Collapse
|
9
|
Bailey MA, Thompson SV, Mysonhimer AR, Bennett JN, Vanhie JJ, De Lisio M, Burd NA, Khan NA, Holscher HD. Dietary fiber intake and fecal short chain fatty acid concentrations are associated with lower plasma lipopolysaccharide-binding protein and inflammation. Am J Physiol Gastrointest Liver Physiol 2023; 324:G369-G377. [PMID: 36791082 DOI: 10.1152/ajpgi.00176.2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
BACKGROUND Consuming adequate dietary fiber is a promising strategy for reducing systemic inflammation. OBJECTIVE To evaluate relationships between dietary fiber intake, markers of metabolic endotoxemia, and systemic inflammation in adults. METHODS This was a cross-sectional study of 129 healthy participants (age 33.6 ± 6.1 years, BMI 30.5 ± 6.9 kg/m2). Dietary fiber intake was assessed by food frequency questionnaire. Adiposity was measured using dual energy X-ray absorptiometry (DXA). Fecal short chain fatty acids (SCFA) were quantified using gas chromatography mass spectrometry. Fecal microbiota sequence data (V4 region, 16S rRNA gene) were analyzed using DADA2 and QIIME2. Inflammatory cytokines were assessed with enzyme-linked immunosorbent assays; flow cytometry was conducted for monocyte surface marker quantification. Bivariate correlations and generalized step-wise linear modeling were used for statistical analyses. RESULTS Plasma C-reactive protein (CRP) and interleukin (IL)-6 concentrations were positively related to whole-body (CRP r = 0.45, p = <0.0001; IL-6 r = 0.34, p = 0.0002) and visceral adiposity (CRP r = 0.33, p = 0.0003; IL-6 r = 0.38, p = 0.0002). Plasma lipopolysaccharide binding protein (LBP) concentrations were inversely related to dietary fiber intake (r = -0.22, p = 0.03) and fecal SCFA (acetate r = -0.25, p = 0.01; propionate r = -0.28, p = 0.003; butyrate r = -0.23, p = 0.02). Whole-body adiposity, dietary fiber, and fecal SCFA were the most predictive of plasma LBS-BP concentrations. CONCLUSIONS Novel findings included associations between dietary fiber intake, the gastrointestinal microbiota, and systemic inflammation.
Collapse
Affiliation(s)
- Melisa A Bailey
- Division of Nutritional Sciences, University of Illinois at Urbana Champaign, Urbana, IL, United States
| | - Sharon V Thompson
- Division of Nutritional Sciences, University of Illinois at Urbana Champaign, Urbana, IL, United States
| | - Annemarie R Mysonhimer
- Department of Food Science and Human Nutrition, University of Illinois at Urbana Champaign, Urbana, IL, United States
| | - Jessica N Bennett
- School of Molecular and Cellular Biology, University of Illinois at Urbana Champaign, Urbana, IL, United States
| | - James J Vanhie
- School of Human Kinetics, University of Ottawa, Ottawa, Ontario, Canada
| | - Michael De Lisio
- School of Human Kinetics, University of Ottawa, Ottawa, Ontario, Canada.,Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Nicholas A Burd
- Division of Nutritional Sciences, University of Illinois at Urbana Champaign, Urbana, IL, United States.,Department of Kinesiology and Community Health, University of Illinois at Urbana Champaign, Urbana, IL, United States
| | - Naiman A Khan
- Division of Nutritional Sciences, University of Illinois at Urbana Champaign, Urbana, IL, United States.,Department of Kinesiology and Community Health, University of Illinois at Urbana Champaign, Urbana, IL, United States
| | - Hannah D Holscher
- Division of Nutritional Sciences, University of Illinois at Urbana Champaign, Urbana, IL, United States.,School of Molecular and Cellular Biology, University of Illinois at Urbana Champaign, Urbana, IL, United States.,Department of Kinesiology and Community Health, University of Illinois at Urbana Champaign, Urbana, IL, United States
| |
Collapse
|
10
|
Fuke N, Yamashita T, Shimizu S, Matsumoto M, Sawada K, Jung S, Tokuda I, Misawa M, Suzuki S, Ushida Y, Mikami T, Itoh K, Suganuma H. Association of Plasma Lipopolysaccharide-Binding Protein Concentration with Dietary Factors, Gut Microbiota, and Health Status in the Japanese General Adult Population: A Cross-Sectional Study. Metabolites 2023; 13:metabo13020250. [PMID: 36837869 PMCID: PMC9965710 DOI: 10.3390/metabo13020250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 02/07/2023] [Accepted: 02/07/2023] [Indexed: 02/12/2023] Open
Abstract
The influx of intestinal bacteria-derived lipopolysaccharide (LPS) into the blood has attracted attention as a cause of diseases. The aim of this study is investigating the associations between the influx of LPS, dietary factors, gut microbiota, and health status in the general adult population. Food/nutrient intake, gut microbiota, health status and plasma LPS-binding protein (LBP; LPS exposure indicator) were measured in 896 residents (58.1% female, mean age 54.7 years) of the rural Iwaki district of Japan, and each correlation was analyzed. As the results, plasma LBP concentration correlated with physical (right/left arms' muscle mass [β = -0.02, -0.03]), renal (plasma renin activity [β = 0.27], urine albumin creatinine ratio [β = 0.50]), adrenal cortical (cortisol [β = 0.14]), and thyroid function (free thyroxine [β = 0.05]), iron metabolism (serum iron [β = -0.14]), and markers of lifestyle-related diseases (all Qs < 0.20). Plasma LBP concentration were mainly negatively correlated with vegetables/their nutrients intake (all βs ≤ -0.004, Qs < 0.20). Plasma LBP concentration was positively correlated with the proportion of Prevotella (β = 0.32), Megamonas (β = 0.56), and Streptococcus (β = 0.65); and negatively correlated with Roseburia (β = -0.57) (all Qs < 0.20). Dietary factors correlated with plasma LBP concentration correlated with positively (all βs ≥ 0.07) or negatively (all βs ≤ -0.07) the proportion of these bacteria (all Qs < 0.20). Our results suggested that plasma LBP concentration in the Japanese general adult population was associated with various health issues, and that dietary habit was associated with plasma LBP concentration in relation to the intestinal bacteria.
Collapse
Affiliation(s)
- Nobuo Fuke
- Innovation Division, KAGOME Co., Ltd., 17 Nishitomiyama, Nasushiobara 329-2762, Tochigi, Japan
- Correspondence: ; Tel.: +81-80-1573-5815
| | - Takahiro Yamashita
- Innovation Division, KAGOME Co., Ltd., 17 Nishitomiyama, Nasushiobara 329-2762, Tochigi, Japan
| | - Sunao Shimizu
- Innovation Division, KAGOME Co., Ltd., 17 Nishitomiyama, Nasushiobara 329-2762, Tochigi, Japan
- Department of Vegetable Life Science, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki 036-8562, Aomori, Japan
| | - Mai Matsumoto
- Innovation Division, KAGOME Co., Ltd., 17 Nishitomiyama, Nasushiobara 329-2762, Tochigi, Japan
| | - Kaori Sawada
- Innovation Center for Health Promotion, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki 036-8562, Aomori, Japan
| | - Songee Jung
- Innovation Center for Health Promotion, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki 036-8562, Aomori, Japan
- Department of Digital Nutrition and Health Sciences, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki 036-8562, Aomori, Japan
| | - Itoyo Tokuda
- Innovation Center for Health Promotion, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki 036-8562, Aomori, Japan
| | - Mina Misawa
- Center of Innovation Research Initiatives Organization, Hirosaki University, 5 Zaifu-cho, Hirosaki 036-8562, Aomori, Japan
| | - Shigenori Suzuki
- Innovation Division, KAGOME Co., Ltd., 17 Nishitomiyama, Nasushiobara 329-2762, Tochigi, Japan
| | - Yusuke Ushida
- Innovation Division, KAGOME Co., Ltd., 17 Nishitomiyama, Nasushiobara 329-2762, Tochigi, Japan
| | - Tatsuya Mikami
- Innovation Center for Health Promotion, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki 036-8562, Aomori, Japan
| | - Ken Itoh
- Department of Vegetable Life Science, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki 036-8562, Aomori, Japan
- Department of Stress Response Science, Center for Advanced Medical Research, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki 036-8562, Aomori, Japan
| | - Hiroyuki Suganuma
- Innovation Division, KAGOME Co., Ltd., 17 Nishitomiyama, Nasushiobara 329-2762, Tochigi, Japan
| |
Collapse
|
11
|
Takeuchi T, Kameyama K, Miyauchi E, Nakanishi Y, Kanaya T, Fujii T, Kato T, Sasaki T, Tachibana N, Negishi H, Matsui M, Ohno H. Fatty acid overproduction by gut commensal microbiota exacerbates obesity. Cell Metab 2023; 35:361-375.e9. [PMID: 36652945 DOI: 10.1016/j.cmet.2022.12.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 07/25/2022] [Accepted: 12/19/2022] [Indexed: 01/19/2023]
Abstract
Although recent studies have highlighted the impact of gut microbes on the progression of obesity and its comorbidities, it is not fully understood how these microbes promote these disorders, especially in terms of the role of microbial metabolites. Here, we report that Fusimonas intestini, a commensal species of the family Lachnospiraceae, is highly colonized in both humans and mice with obesity and hyperglycemia, produces long-chain fatty acids such as elaidate, and consequently facilitates diet-induced obesity. High fat intake altered the expression of microbial genes involved in lipid production, such as the fatty acid metabolism regulator fadR. Monocolonization with a FadR-overexpressing Escherichia coli exacerbated the metabolic phenotypes, suggesting that the change in bacterial lipid metabolism is causally involved in disease progression. Mechanistically, the microbe-derived fatty acids impaired intestinal epithelial integrity to promote metabolic endotoxemia. Our study thus provides a mechanistic linkage between gut commensals and obesity through the overproduction of microbe-derived lipids.
Collapse
Affiliation(s)
- Tadashi Takeuchi
- Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, Yokohama 230-0045, Japan
| | - Keishi Kameyama
- Institute of Food Sciences and Technologies, Ajinomoto Co., Inc., Kawasaki 210-8681, Japan
| | - Eiji Miyauchi
- Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, Yokohama 230-0045, Japan; Institute for Molecular and Cellular Regulation, Gunma University, Maebashi 371-8512, Japan
| | - Yumiko Nakanishi
- Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, Yokohama 230-0045, Japan
| | - Takashi Kanaya
- Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, Yokohama 230-0045, Japan; Graduate School of Medical Life Science, Yokohama City University, Yokohama 230-0045, Japan
| | - Takayoshi Fujii
- Institute of Food Sciences and Technologies, Ajinomoto Co., Inc., Kawasaki 210-8681, Japan
| | - Tamotsu Kato
- Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, Yokohama 230-0045, Japan
| | - Takaharu Sasaki
- Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, Yokohama 230-0045, Japan
| | - Naoko Tachibana
- Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, Yokohama 230-0045, Japan
| | - Hiroki Negishi
- Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, Yokohama 230-0045, Japan; Graduate School of Medical Life Science, Yokohama City University, Yokohama 230-0045, Japan
| | - Misato Matsui
- Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, Yokohama 230-0045, Japan; Graduate School of Medical Life Science, Yokohama City University, Yokohama 230-0045, Japan
| | - Hiroshi Ohno
- Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, Yokohama 230-0045, Japan; Graduate School of Medical Life Science, Yokohama City University, Yokohama 230-0045, Japan.
| |
Collapse
|
12
|
Moser B, Moore D, Khadka B, Lyons C, Foxall T, Andam CP, Parker CJ, Ochin C, Garelnabi M, Sevigny J, Thomas WK, Bigornia S, Dao MC. Association between inflammation, lipopolysaccharide binding protein, and gut microbiota composition in a New Hampshire Bhutanese refugee population with a high burden of type 2 diabetes. Front Nutr 2023; 9:1059163. [PMID: 36687728 PMCID: PMC9852993 DOI: 10.3389/fnut.2022.1059163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Accepted: 12/12/2022] [Indexed: 01/07/2023] Open
Abstract
Introduction South Asian refugees experience a high risk of obesity and diabetes yet are often underrepresented in studies on chronic diseases and their risk factors. The gut microbiota and gut permeability, as assessed through circulating lipopolysaccharide binding protein (LBP), may underlie the link between chronic inflammation and type 2 diabetes (T2D). The composition of the gut microbiota varies according to multiple factors including demographics, migration, and dietary patterns, particularly fiber intake. However, there is no evidence on the composition of the gut microbiota and its relationship with metabolic health in refugee populations, including those migrating to the United States from Bhutan. The objective of this study was to examine glycemic status in relation to LBP, systemic inflammation fiber intake, and gut microbiota composition in Bhutanese refugee adults residing in New Hampshire (n = 50). Methods This cross-sectional study included a convenience sample of Bhutanese refugee adults (N = 50) in NH. Established bioinformatics pipelines for metagenomic analysis were used to determine relative genus abundance, species richness, and alpha diversity measures from shallow shotgun sequences. The relationships between inflammatory markers, gut microbiota composition, dietary fiber, and glycemic status were analyzed. Results We identified a substantial chronic disease burden in this study population, and observed a correlation between glycemic status, LBP, and inflammation, and a correlation between glycemic status and gut microbiome alpha diversity. Further, we identified a significant correlation between proinflammatory taxa and inflammatory cytokines. SCFA-producing taxa were found to be inversely correlated with age. Conclusion To date, this is the most comprehensive examination of metabolic health and the gut microbiome in a Bhutanese refugee population in NH. The findings highlight areas for future investigations of inflammation and glycemic impairment, in addition to informing potential interventions targeting this vulnerable population.
Collapse
Affiliation(s)
- Brandy Moser
- Department of Agriculture, Nutrition, and Food Systems, University of New Hampshire, Durham, NH, United States
| | - Dustin Moore
- Department of Agriculture, Nutrition, and Food Systems, University of New Hampshire, Durham, NH, United States
| | - Bishnu Khadka
- Building Community in New Hampshire, Manchester, NH, United States
| | - Carrie Lyons
- Department of Agriculture, Nutrition, and Food Systems, University of New Hampshire, Durham, NH, United States
| | - Tom Foxall
- Department of Biological Sciences, University of New Hampshire, Durham, NH, United States
| | - Cheryl P. Andam
- Department of Molecular, Cellular, and Biomedical Sciences, University of New Hampshire, Durham, NH, United States,Department of Biological Sciences, University at Albany, Albany, NY, United States
| | - Cooper J. Parker
- Department of Biological Sciences, University of New Hampshire, Durham, NH, United States
| | - Chinedu Ochin
- Department of Biomedical and Nutritional Sciences, University of Massachusetts Lowell, Lowell, MA, United States
| | - Mahdi Garelnabi
- Department of Biomedical and Nutritional Sciences, University of Massachusetts Lowell, Lowell, MA, United States
| | - Joseph Sevigny
- Department of Molecular, Cellular, and Biomedical Sciences, Hubbard Center for Genome Studies, University of New Hampshire, Durham, NH, United States
| | - W. Kelley Thomas
- Department of Molecular, Cellular, and Biomedical Sciences, Hubbard Center for Genome Studies, University of New Hampshire, Durham, NH, United States
| | - Sherman Bigornia
- Department of Agriculture, Nutrition, and Food Systems, University of New Hampshire, Durham, NH, United States
| | - Maria Carlota Dao
- Department of Agriculture, Nutrition, and Food Systems, University of New Hampshire, Durham, NH, United States,*Correspondence: Maria Carlota Dao,
| |
Collapse
|
13
|
Saleh-Ghadimi S, Dehghan P, Sarmadi B, Maleki P. Improvement of sleep by resistant dextrin prebiotic in type 2 diabetic women coincides with attenuation of metabolic endotoxemia: involvement of gut-brain axis. J Sci Food Agric 2022; 102:5229-5237. [PMID: 35306660 DOI: 10.1002/jsfa.11876] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 03/12/2022] [Accepted: 03/20/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Resistant dextrin, as a prebiotic and functional food, may possess favorable effects in type 2 diabetes. This study was conducted to assess whether supplementation with resistant dextrin can improve sleep and quality of life in obese type 2 diabetic women. RESULTS In this randomized controlled trial, female obese type 2 diabetic patients (n = 76) were randomly assigned into intervention group (n = 38) and placebo group (n = 38), and received 10 g day-1 of resistant dextrin or maltodextrin for a period of 8 weeks, respectively. Sleep quality and quality of life (QOL) were assessed by Pittsburgh Sleep Quality Index (PSQI) and SF-36 health survey, respectively. Fasting blood samples were driven to measure serum bacterial endotoxin, fasting blood sugar, glycosylated hemoglobin (HbA1c), pro-inflammatory/anti-inflammatory biomarkers (IL-18, IL-6, IL-10, TNF-α), and biomarkers of hypothalamic-pituitary-adrenal (HPA) axis function [tryptophan (TRP), adrenocorticotropic hormone (ACTH), kynurenine (KYN), cortisol]. Supplementation with resistant dextrin improved sleep (P < 0.001) and QOL (P < 0.001) significantly. It also caused a significant decrease in levels of endotoxin, HbA1c, IL-18, IL-6, TNF-α and a significant increase in IL-10 levels. Significant and positive correlations were found between endotoxin (r = 0.488, P = 0.003), IL-6 (r = 0.436, P = 0.008), IL-18 (r = 0.475, P = 0.003), cortisol (r = 0.545, P = 0.048), KYN/TRP (r = 0.527, P = 0.001), and PSQI scores. CONCLUSIONS It is concluded that resistant dextrin improves sleep and QOL in obese women with type 2 diabetes. Its beneficial effects may be attributed in part to modulation of glycemia, metabolic endotoxemia and subsequently a decrease in biomarkers of inflammation and HPA axis activity. © 2022 Society of Chemical Industry.
Collapse
Affiliation(s)
- Sevda Saleh-Ghadimi
- Clinical Research Development Unit of Tabriz Valiasr Hospital, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Parvin Dehghan
- Nutrition Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Bahareh Sarmadi
- Department of Nutrition Sciences, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Malaysia
| | - Parham Maleki
- Student Research Committee, Faculty of Nutrition and Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| |
Collapse
|
14
|
Mohr AE, Crawford M, Jasbi P, Fessler S, Sweazea KL. Lipopolysaccharide and the gut microbiota: Considering structural variation. FEBS Lett 2022; 596:849-875. [PMID: 35262962 DOI: 10.1002/1873-3468.14328] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 02/16/2022] [Accepted: 02/17/2022] [Indexed: 11/10/2022]
Abstract
Systemic inflammation is associated with chronic disease and is purported to be a main pathogenic mechanism underlying metabolic conditions. Microbes harbored in the host gastrointestinal tract release signaling byproducts from their cell wall, such as lipopolysaccharides (LPS), which can act locally and, after crossing the gut barrier and entering circulation, also systemically. Defined as metabolic endotoxemia, elevated concentrations of LPS in circulation are associated with metabolic conditions and chronic disease. As such, measurement of LPS is highly prevalent in animal and human research investigating these states. Indeed, LPS can be a potent stimulant of host immunity but this response depends on the microbial species' origin, a parameter often overlooked in both preclinical and clinical investigations. Indeed, the lipid A portion of LPS is mutable and comprises the main virulence and endotoxic component, thus contributing to the structural and functional diversity among LPSs from microbial species. In this review, we discuss how such structural differences in LPS can induce differential immunological responses in the host.
Collapse
Affiliation(s)
- Alex E Mohr
- College of Health Solutions, Arizona State University, Phoenix, Arizona, United States of America
| | - Meli'sa Crawford
- Biomedical Sciences, University of Riverside, California, Riverside, California, United States of America
| | - Paniz Jasbi
- College of Health Solutions, Arizona State University, Phoenix, Arizona, United States of America
| | - Samantha Fessler
- College of Health Solutions, Arizona State University, Phoenix, Arizona, United States of America
| | - Karen L Sweazea
- College of Health Solutions, Arizona State University, Phoenix, Arizona, United States of America.,School of Life Sciences, Arizona State University, Tempe, Arizona, United States of America
| |
Collapse
|
15
|
Shi Y, Zou Y, Xiong Y, Zhang S, Song M, An X, Liu C, Zhang W, Chen S. Host Gasdermin D restrains systemic endotoxemia by capturing Proteobacteria in the colon of high-fat diet-feeding mice. Gut Microbes 2021; 13:1946369. [PMID: 34275417 PMCID: PMC8288038 DOI: 10.1080/19490976.2021.1946369] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Gasdermin D (GSDMD) functions as a key pyroptotic executor through its secreted N-terminal domain (GSDMD-N). However, the functional relevance and mechanistic basis of the precise roles of host colonic GSDMD in high-fat diet (HFD)-induced gut dysbiosis and systemic endotoxemia remain elusive. In this study, we demonstrate that HFD feeding triggers GSDMD-N secretion of both T-lymphocytes and enterocytes in mouse colons. GSDMD deficiency aggravates HFD-induced systemic endotoxemia, gut barrier impairment, and colonic inflammation. More importantly, active GSDMD-N kills the Proteobacteria phylum via directly interacting with Cardiolipin. Mechanistically, we identify that the Glu236 (a known residue for GSDMD protein cleavage) is a bona fide important site for the bacterial recognition of GSDMD. Collectively, our findings explain the mechanism by which colonic GSDMD-N maintains low levels of HFD-induced metabolic endotoxemia. A GSDMD-N mimetic containing an exposed Glu236 site could be an attractive strategy for the treatment of HFD-induced metabolic endotoxemia.
Collapse
Affiliation(s)
- Yujie Shi
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China,School of Life Science and Technology, China Pharmaceutical University, Nanjing, China
| | - Yixin Zou
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, China
| | - Yonghong Xiong
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, China
| | - Shiyao Zhang
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, China,Wenxiang Zhang State Key Laboratory of Natural Medicines, China Pharmaceutical University, #639 Longmian Avenue, Nanjing211198, China
| | - Mingming Song
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, China
| | - Xiaofei An
- Department of Endocrinology, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Chang Liu
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China,School of Life Science and Technology, China Pharmaceutical University, Nanjing, China
| | - Wenxiang Zhang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China,School of Life Science and Technology, China Pharmaceutical University, Nanjing, China,Wenxiang Zhang State Key Laboratory of Natural Medicines, China Pharmaceutical University, #639 Longmian Avenue, Nanjing211198, China
| | - Siyu Chen
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China,School of Life Science and Technology, China Pharmaceutical University, Nanjing, China,CONTACT Siyu Chen
| |
Collapse
|
16
|
Varesi A, Deumer US, Ananth S, Ricevuti G. The Emerging Role of Gut Microbiota in Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS): Current Evidence and Potential Therapeutic Applications. J Clin Med 2021; 10:jcm10215077. [PMID: 34768601 PMCID: PMC8584653 DOI: 10.3390/jcm10215077] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 10/25/2021] [Accepted: 10/28/2021] [Indexed: 12/11/2022] Open
Abstract
The well-known symptoms of Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) are chronic pain, cognitive dysfunction, post-exertional malaise and severe fatigue. Another class of symptoms commonly reported in the context of ME/CFS are gastrointestinal (GI) problems. These may occur due to comorbidities such as Crohn's disease or irritable bowel syndrome (IBS), or as a symptom of ME/CFS itself due to an interruption of the complex interplay between the gut microbiota (GM) and the host GI tract. An altered composition and overall decrease in diversity of GM has been observed in ME/CFS cases compared to controls. In this review, we reflect on genetics, infections, and other influences that may factor into the alterations seen in the GM of ME/CFS individuals, we discuss consequences arising from these changes, and we contemplate the therapeutic potential of treating the gut to alleviate ME/CFS symptoms holistically.
Collapse
Affiliation(s)
- Angelica Varesi
- Department of Biology and Biotechnology, University of Pavia, 27100 Pavia, Italy
- Almo Collegio Borromeo, 27100 Pavia, Italy
- Correspondence: (A.V.); (G.R.)
| | - Undine-Sophie Deumer
- Department of Biological Sciences, Faculty of Natural Sciences and Mathematics, University of Cologne, 50674 Cologne, Germany;
| | - Sanjana Ananth
- Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London SW7 2AZ, UK;
| | - Giovanni Ricevuti
- Department of Drug Sciences, School of Pharmacy, University of Pavia, 27100 Pavia, Italy
- Correspondence: (A.V.); (G.R.)
| |
Collapse
|
17
|
Machado AS, Oliveira JR, de F Lelis D, D Guimarães VH, de Paula AMB, Guimarães ALS, Brandi IV, de Carvalho BMA, da Costa DV, Vieira CR, Pereira UA, de Oliveira Costa T, Andrade JMO, Dos Santos RAS, Santos SHS. Oral angiotensin-(1-7) peptide modulates intestinal microbiota improving metabolic profile in obese mice. Protein Pept Lett 2021; 28:1127-1137. [PMID: 34397321 DOI: 10.2174/0929866528666210816115645] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/25/2021] [Accepted: 06/15/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Obesity is a serious health problem which dysregulate Renin-Angiotensin System and intestinal microbiota. OBJECTIVE The present study aimed to evaluate the Angiotensin-(1-7) [ANG-(1-7)] oral formulation effects on obese mice intestinal microbiota. METHODS Mice were divided into four groups: obese and non-obese treated with ANG-(1-7) and obese and non-obese without ANG-(1-7) during four weeks. RESULTS We observed a significant decrease in the fasting plasma glucose, total cholesterol, triglycerides, and Low-density lipoprotein levels and increased High-density lipoprotein in animals treated with ANG-(1-7). The histological analysis showed intestinal villi height reduction in mice treated with ANG-(1-7). Additionally, increased Bacteroidetes and decreased Firmicutes (increased Bacteroidetes/Firmicutes ratio) and Enterobacter cloacae populations were observed in the High-Fat Diet + ANG-(1-7) group. Receptor toll-like 4 (TLR4) intestinal mRNA expression was reduced in the HFD+ ANG-(1-7) group. Finally, the intestinal expression of the neutral amino acid transporter (B0AT1) was increased in animals treated with ANG-(1-7), indicating a possible mechanism associated with tryptophan uptake. CONCLUSION The results of the present study suggest for the first time an interaction between oral ANG-(1-7) and intestinal microbiota modulation.
Collapse
Affiliation(s)
- Amanda S Machado
- Laboratory of Health Science, Postgraduate Program in Health Sciences, Montes Claros, Minas Gerais, Brazil
| | - Janaína R Oliveira
- Laboratory of Health Science, Postgraduate Program in Health Sciences, Montes Claros, Minas Gerais, Brazil
| | - Deborah de F Lelis
- Laboratory of Health Science, Postgraduate Program in Health Sciences, Montes Claros, Minas Gerais, Brazil
| | - Victor Hugo D Guimarães
- Laboratory of Health Science, Postgraduate Program in Health Sciences, Montes Claros, Minas Gerais, Brazil
| | - Alfredo M B de Paula
- Laboratory of Health Science, Postgraduate Program in Health Sciences, Montes Claros, Minas Gerais, Brazil
| | - André L S Guimarães
- Laboratory of Health Science, Postgraduate Program in Health Sciences, Montes Claros, Minas Gerais, Brazil
| | - Igor V Brandi
- Institute of Agricultural Sciences. Food Engineering College, Universidade Federal de Minas Gerais (UFMG), Montes Claros, Minas Gerais, Brazil
| | - Bruna Mara A de Carvalho
- Institute of Agricultural Sciences. Food Engineering College, Universidade Federal de Minas Gerais (UFMG), Montes Claros, Minas Gerais, Brazil
| | - Diego Vicente da Costa
- Institute of Agricultural Sciences. Food Engineering College, Universidade Federal de Minas Gerais (UFMG), Montes Claros, Minas Gerais, Brazil
| | - Cláudia Regina Vieira
- Institute of Agricultural Sciences. Food Engineering College, Universidade Federal de Minas Gerais (UFMG), Montes Claros, Minas Gerais, Brazil
| | - Ulisses Alves Pereira
- Institute of Agricultural Sciences. Food Engineering College, Universidade Federal de Minas Gerais (UFMG), Montes Claros, Minas Gerais, Brazil
| | - Theles de Oliveira Costa
- Institute of Agricultural Sciences. Food Engineering College, Universidade Federal de Minas Gerais (UFMG), Montes Claros, Minas Gerais, Brazil
| | - João M O Andrade
- Institute of Agricultural Sciences. Food Engineering College, Universidade Federal de Minas Gerais (UFMG), Montes Claros, Minas Gerais, Brazil
| | - Robson A S Dos Santos
- Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Sérgio H S Santos
- Laboratory of Health Science, Postgraduate Program in Health Sciences, Montes Claros, Minas Gerais, Brazil
| |
Collapse
|
18
|
Candelli M, Franza L, Pignataro G, Ojetti V, Covino M, Piccioni A, Gasbarrini A, Franceschi F. Interaction between Lipopolysaccharide and Gut Microbiota in Inflammatory Bowel Diseases. Int J Mol Sci 2021; 22:ijms22126242. [PMID: 34200555 PMCID: PMC8226948 DOI: 10.3390/ijms22126242] [Citation(s) in RCA: 91] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/22/2021] [Accepted: 06/08/2021] [Indexed: 02/06/2023] Open
Abstract
Lipopolysaccharides (LPSs) are bacterial surface glycolipids, produced by Gram-negative bacteria. LPS is known to determine acute inflammatory reactions, particularly in the context of sepsis. However, LPS can also trigger chronic inflammation. In this case, the source of LPS is not an external infection, but rather an increase in endogenous production, which is usually sustained by gut microbiota (GM), and LPS contained in food. The first site in which LPS can exert its inflammatory action is the gut: both GM and gut-associated lymphoid tissue (GALT) are influenced by LPS and shift towards an inflammatory pattern. The changes in GM and GALT induced by LPS are quite similar to the ones seen in IBD: GM loses diversity, while GALT T regulatory (Tregs) lymphocytes are reduced in number, with an increase in Th17 and Th1 lymphocytes. Additionally, the innate immune system is triggered, through the activation of toll-like receptor (TLR)-4, while the epithelium is directly damaged, further triggering inflammation. In this review, we will discuss the importance of the crosstalk between LPS, GM, and GALT, and discuss the possible implications.
Collapse
Affiliation(s)
- Marcello Candelli
- Emergency Medicine Department, Fondazione Policlinico Universitario Agostino Gemelli—IRCCS, Università Cattolica del Sacro Cuore di Roma, Largo A. Gemelli 8, 00168 Rome, Italy; (L.F.); (G.P.); (V.O.); (M.C.); (A.P.); (F.F.)
- Correspondence: ; Tel.: +39-0630153161
| | - Laura Franza
- Emergency Medicine Department, Fondazione Policlinico Universitario Agostino Gemelli—IRCCS, Università Cattolica del Sacro Cuore di Roma, Largo A. Gemelli 8, 00168 Rome, Italy; (L.F.); (G.P.); (V.O.); (M.C.); (A.P.); (F.F.)
| | - Giulia Pignataro
- Emergency Medicine Department, Fondazione Policlinico Universitario Agostino Gemelli—IRCCS, Università Cattolica del Sacro Cuore di Roma, Largo A. Gemelli 8, 00168 Rome, Italy; (L.F.); (G.P.); (V.O.); (M.C.); (A.P.); (F.F.)
| | - Veronica Ojetti
- Emergency Medicine Department, Fondazione Policlinico Universitario Agostino Gemelli—IRCCS, Università Cattolica del Sacro Cuore di Roma, Largo A. Gemelli 8, 00168 Rome, Italy; (L.F.); (G.P.); (V.O.); (M.C.); (A.P.); (F.F.)
| | - Marcello Covino
- Emergency Medicine Department, Fondazione Policlinico Universitario Agostino Gemelli—IRCCS, Università Cattolica del Sacro Cuore di Roma, Largo A. Gemelli 8, 00168 Rome, Italy; (L.F.); (G.P.); (V.O.); (M.C.); (A.P.); (F.F.)
| | - Andrea Piccioni
- Emergency Medicine Department, Fondazione Policlinico Universitario Agostino Gemelli—IRCCS, Università Cattolica del Sacro Cuore di Roma, Largo A. Gemelli 8, 00168 Rome, Italy; (L.F.); (G.P.); (V.O.); (M.C.); (A.P.); (F.F.)
| | - Antonio Gasbarrini
- Medical and Surgical Science Department, Fondazione Policlinico Universitario Agostino Gemelli—IRCCS, Università Cattolica del Sacro Cuore di Roma, Largo A. Gemelli 8, 00168 Rome, Italy;
| | - Francesco Franceschi
- Emergency Medicine Department, Fondazione Policlinico Universitario Agostino Gemelli—IRCCS, Università Cattolica del Sacro Cuore di Roma, Largo A. Gemelli 8, 00168 Rome, Italy; (L.F.); (G.P.); (V.O.); (M.C.); (A.P.); (F.F.)
| |
Collapse
|
19
|
Abstract
Diet-induced metabolic endotoxemia is an important factor in the development of many chronic diseases in animals and man. The gut epithelium is an efficient barrier that prevents the absorption of liposaccharide (LPS). Structural changes to the intestinal epithelium in response to dietary alterations allow LPS to enter the bloodstream, resulting in an increase in the plasma levels of LPS (termed metabolic endotoxemia). LPS activates Toll-like receptor-4 (TLR4) leading to the production of numerous pro-inflammatory cytokines and, hence, low-grade systemic inflammation. Thus, metabolic endotoxemia can lead to several chronic inflammatory conditions. Obesity, diabetes, and non-alcoholic fatty liver disease (NAFLD) can also cause an increase in gut permeability and potential pharmacological and dietary interventions could be used to reduce the chronic low-grade inflammation associated with endotoxemia.
Collapse
Affiliation(s)
- Shireen Mohammad
- William Harvey Research Institute, Queen Mary University of London, London, United Kingdom
| | | |
Collapse
|
20
|
Abstract
BACKGROUND Coffee can regulate glucose homeostasis but the underlying mechanism is unclear. This study investigated the preventive and therapeutic effects of chlorogenic acid (CGA), a polyphenol that is found in coffee, on obesity and obesity-related metabolic endotoxemia. METHOD Male 4-week-old C57BL/6 mice were fed either normal chow or a high-fat diet or 20 weeks and half the mice in each group were gavaged with CGA. Oral glucose tolerance tests (OGTTs) and insulin tolerance tests (ITTs) were performed. Markers of inflammation and intestinal barrier function were assayed. The composition of the gut microbiota was analyzed by 16S rRNA high-throughput pyrosequencing. The role of CGA-altered microbiota in metabolic endotoxemia was verified by fecal microbiota transplantation. RESULTS CGA protected against HFD-induced weight gain, decreased the relative weight of subcutaneous and visceral adipose, improved intestinal barrier integrity, and prevented glucose metabolic disorders and endotoxemia (P <0.05). CGA significantly changed the composition of the gut microbiota and increased the abundance of short chain fatty acid (SCFA)-producers (e.g., Dubosiella, Romboutsia, Mucispirillum, and Faecalibaculum) and Akkermansia, which can protect the intestinal barrier. In addition, mice with the CGA-altered microbiota had decreased body weight and fat content and inhibited metabolic endotoxemia. CONCLUSION CGA-induced changes in the gut microbiota played an important role in the inhibition of metabolic endotoxemia in HFD-fed mice.
Collapse
Affiliation(s)
- Xiaolin Ye
- Department of Social Medicine, Institute of health sciences, China Medical University, Shenyang, China
- Department of Gastroenterology, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health, Beijing, China
| | - Yang Liu
- Department of Social Medicine, Institute of health sciences, China Medical University, Shenyang, China
| | - Jiajin Hu
- Department of Social Medicine, Institute of health sciences, China Medical University, Shenyang, China
| | - Yanyan Gao
- Department of Social Medicine, Institute of health sciences, China Medical University, Shenyang, China
| | - Yanan Ma
- Department of Social Medicine, Institute of health sciences, China Medical University, Shenyang, China
| | - Deliang Wen
- Department of Social Medicine, Institute of health sciences, China Medical University, Shenyang, China
- *Correspondence: Deliang Wen,
| |
Collapse
|
21
|
Kurita N, Yamashiro K, Kuroki T, Tanaka R, Urabe T, Ueno Y, Miyamoto N, Takanashi M, Shimura H, Inaba T, Yamashiro Y, Nomoto K, Matsumoto S, Takahashi T, Tsuji H, Asahara T, Hattori N. Metabolic endotoxemia promotes neuroinflammation after focal cerebral ischemia. J Cereb Blood Flow Metab 2020; 40:2505-2520. [PMID: 31910709 PMCID: PMC7820690 DOI: 10.1177/0271678x19899577] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Lipopolysaccharide (LPS) is a major component of the outer membrane of Gram-negative bacteria and a potent inflammatory stimulus for the innate immune response via toll-like receptor (TLR) 4 activation. Type 2 diabetes is associated with changes in gut microbiota and impaired intestinal barrier functions, leading to translocation of microbiota-derived LPS into the circulatory system, a condition referred to as metabolic endotoxemia. We investigated the effects of metabolic endotoxemia after experimental stroke with transient middle cerebral artery occlusion (MCAO) in a murine model of type 2 diabetes (db/db) and phenotypically normal littermates (db/+). Compared to db/+ mice, db/db mice exhibited an altered gut microbial composition, increased intestinal permeability, and higher plasma LPS levels. In addition, db/db mice presented increased infarct volumes and higher expression levels of LPS, TLR4, and inflammatory cytokines in the ischemic brain, as well as more severe neurological impairments and reduced survival rates after MCAO. Oral administration of a non-absorbable antibiotic modulated the gut microbiota and improved metabolic endotoxemia and stroke outcomes in db/db mice; these effects were associated with reduction of LPS levels and neuroinflammation in the ischemic brain. These data suggest that targeting metabolic endotoxemia may be a novel potential therapeutic strategy to improve stroke outcomes.
Collapse
Affiliation(s)
- Naohide Kurita
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Kazuo Yamashiro
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Takuma Kuroki
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Ryota Tanaka
- Division of Neurology, Department of Internal Medicine, Jichi Medical University, Tochigi Japan
| | - Takao Urabe
- Department of Neurology, Juntendo University Urayasu Hospital, Chiba, Japan
| | - Yuji Ueno
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Nobukazu Miyamoto
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Masashi Takanashi
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Hideki Shimura
- Department of Neurology, Juntendo University Urayasu Hospital, Chiba, Japan
| | - Toshiki Inaba
- Department of Neurology, Juntendo University Urayasu Hospital, Chiba, Japan
| | - Yuichiro Yamashiro
- Probiotics Research Laboratory, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Koji Nomoto
- Probiotics Research Laboratory, Juntendo University Graduate School of Medicine, Tokyo, Japan.,Department of Molecular Microbiology, Tokyo University of Agriculture, Tokyo, Japan
| | - Satoshi Matsumoto
- Probiotics Research Laboratory, Juntendo University Graduate School of Medicine, Tokyo, Japan.,Yakult Central Institute, Tokyo, Japan
| | - Takuya Takahashi
- Probiotics Research Laboratory, Juntendo University Graduate School of Medicine, Tokyo, Japan.,Yakult Honsha European Research Center for Microbiology ESV, Gent, Belgium
| | - Hirokazu Tsuji
- Probiotics Research Laboratory, Juntendo University Graduate School of Medicine, Tokyo, Japan.,Yakult Central Institute, Tokyo, Japan
| | - Takashi Asahara
- Probiotics Research Laboratory, Juntendo University Graduate School of Medicine, Tokyo, Japan.,Yakult Central Institute, Tokyo, Japan
| | - Nobutaka Hattori
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| |
Collapse
|
22
|
Al-Disi D, Ansari MGA, Sabico S, Wani K, Hussain SD, Elshafie MM, McTernan P, Al-Daghri NM. High glucose load and endotoxemia among overweight and obese Arab women with and without diabetes: An observational study. Medicine (Baltimore) 2020; 99:e23211. [PMID: 33181703 PMCID: PMC7668447 DOI: 10.1097/md.0000000000023211] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Dietary intake influences gut microbiota activity. Nevertheless, there is a lack of evidence available that illustrates the acute effects of high glucose meal on metabolic endotoxemia. The present study assessed the acute impact of high glucose meal on endotoxemia and other clinical parameters in Saudi females with varying degrees of glycemia.The subjects were 64 consenting pre-menopausal women, grouped into 3: control [n = 14 lean, non-T2DM, BMI = 22.2 ± 2.2 kg/m]; overweight [n = 16, non-T2DM, BMI = 28.5 ± 1.5 kg/m] and T2DM [n = 34, BMI = 35.2 ± 7.7 kg/m]. After an overnight fast, all subjects were given a standardized high-glucose (75 g) meal. Anthropometrics were taken and blood samples were withdrawn at baseline and postprandial (0, 2 and 4-hours), serum glucose, endotoxin and lipid profile were quantified.At baseline, total cholesterol, LDL-cholesterol, triglycerides and serum glucose levels were significantly higher (P values <.01) whereas significantly lower HDL-cholesterol levels (P < .01) were observed in T2DM subjects compared to other groups. Baseline endotoxin levels were highest in the overweight group (3.2 ± 1.1 mmol/L) as compared to control (2.0 ± 0.5 mmol/L) and T2DM (2.7 ± 1.2 mmol/L) (P = .046). HDL-cholesterol, LDL-cholesterol and triglycerides, significantly decreased in the T2DM group after 2 hours (P values <.05), whereas unremarkable changes observed in other groups. Lastly, endotoxin levels significantly increased only in the overweight group (3.2 ± 1.1 vs 4.2 ± 1.4 mmol/L; P < .05), 4 hours postprandial.High glucose meal elevates endotoxemia only among overweight subjects and impairs dysbiosis.
Collapse
Affiliation(s)
- Dara Al-Disi
- Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University
| | | | - Shaun Sabico
- Riyadh Biochemistry Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Kaiser Wani
- Riyadh Biochemistry Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Syed Danish Hussain
- Riyadh Biochemistry Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Mona M. Elshafie
- Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University
| | - Philip McTernan
- School of Science and Technology, Department of Biosciences, Nottingham Trent University, Nottingham, NG1 8NS, UK
| | - Nasser M. Al-Daghri
- Riyadh Biochemistry Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| |
Collapse
|
23
|
Sánchez-Tapia M, Moreno-Vicencio D, Ordáz-Nava G, Guevara-Cruz M, Granados-Portillo O, Vargas-Castillo A, Torres N, Tovar AR. Antibiotic Treatment Reduces the Health Benefits of Soy Protein. Mol Nutr Food Res 2020; 64:e2000532. [PMID: 32729948 DOI: 10.1002/mnfr.202000532] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Indexed: 01/15/2023]
Abstract
SCOPE Soy protein is a high-quality protein and its consumption has been associated with a reduction of serum cholesterol and triglycerides and an improvement in insulin resistance. However, it is not known whether the effects of soy protein are mediated by the gut microbiota. Thus, the aim of this study is to assess whether using antibiotics to partially eradicate the gut microbiota can prevent the beneficial effects of soy protein in rats. METHODS AND RESULTS Thus, rats are fed one of the following diets for 16 weeks: casein control, soy protein control, high-fat casein, and high-fat soy protein. The rats are then treated for 4 weeks with antibiotics. Body weight and composition, energy expenditure, glucose tolerance test, metabolic endotoxemia, and gut microbiota are measured before and after treatment with antibiotic. The results show that soy protein consumption decreases weight gain, body fat, metabolic endotoxemia, and increases energy expenditure and glucose tolerance. Antibiotic treatment suppresses all these metabolic effects. These changes are accompanied by modifying the diversity and taxonomy of the gut microbiota. CONCLUSION In conclusion, the evidence suggests that the health benefits of soy protein are partly dependent of the gut microbiota.
Collapse
Affiliation(s)
- Monica Sánchez-Tapia
- Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Av. Vasco de Quiroga No. 15 Col. Belisario Domínguez Sección XVI, Mexico, CDMX, 14080, Mexico
| | - Daniela Moreno-Vicencio
- Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Av. Vasco de Quiroga No. 15 Col. Belisario Domínguez Sección XVI, Mexico, CDMX, 14080, Mexico
| | - Guillermo Ordáz-Nava
- Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Av. Vasco de Quiroga No. 15 Col. Belisario Domínguez Sección XVI, Mexico, CDMX, 14080, Mexico
| | - Martha Guevara-Cruz
- Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Av. Vasco de Quiroga No. 15 Col. Belisario Domínguez Sección XVI, Mexico, CDMX, 14080, Mexico
| | - Omar Granados-Portillo
- Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Av. Vasco de Quiroga No. 15 Col. Belisario Domínguez Sección XVI, Mexico, CDMX, 14080, Mexico
| | - Ariana Vargas-Castillo
- Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Av. Vasco de Quiroga No. 15 Col. Belisario Domínguez Sección XVI, Mexico, CDMX, 14080, Mexico
| | - Nimbe Torres
- Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Av. Vasco de Quiroga No. 15 Col. Belisario Domínguez Sección XVI, Mexico, CDMX, 14080, Mexico
| | - Armando R Tovar
- Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Av. Vasco de Quiroga No. 15 Col. Belisario Domínguez Sección XVI, Mexico, CDMX, 14080, Mexico
| |
Collapse
|
24
|
Abstract
The present study was designed to investigate the effect of embelin in metabolic endotoxemia (ME) mediated inflammation and associated obesity in high fat diet (HFD)-fed C57BL/6 mice. The molecular docking of embelin confirms its binding with the toll-like receptor-4 (TLR-4). In vivo study, mice were treated with HFD for 8 weeks to induce ME mediated inflammation and associated obesity. Further, mice were treated with embelin (50 and 100 mg/kg/day, p.o.) and orlistat (10 mg/kg/day, p.o.) from 5th to 8th week along with HFD to improve associated changes. After 8 weeks, mice were euthanized and assessed for body weight, body mass index (BMI), fat pad weights (mesenteric, retroperitoneal, and epididymal), intestinal permeability, TLR-4, tumor necrosis factor-α, interleukin-6, lipopolysaccharide, and serum lipid levels followed by histopathological analysis of liver and adipose tissues. Embelin significantly decreased the body weight, BMI, serum lipid levels, ME, and inflammation manifested by above parameters. Further, results of histopathological study showed that embelin restored the vacuolization, inflammation, one side shifting of nucleus in liver tissue, and decreased adipocyte cells size in adipose tissue in HFD-fed mice. Thus, our findings provide the strong evidence first time that embelin could modulate ME, mediate inflammation, and consequently reduce body weight gain, BMI, and serum lipid levels in HFD-fed mice.
Collapse
Affiliation(s)
- P Bansal
- Department of Pharmacology, School of Pharmaceutical Education and Research (SPER), 28848Jamia Hamdard, New Delhi, India
| | - U Bhandari
- Department of Pharmacology, School of Pharmaceutical Education and Research (SPER), 28848Jamia Hamdard, New Delhi, India
| | - K Sharma
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Education and Research (SPER), 28848Jamia Hamdard, New Delhi, India
| | - P Arya
- Department of Pharmacology, School of Pharmaceutical Education and Research (SPER), 28848Jamia Hamdard, New Delhi, India
| |
Collapse
|
25
|
Dewhurst-Trigg R, Wadley AJ, Woods RM, Sherar LB, Bishop NC, Hulston CJ, Markey O. Short-term High-fat Overfeeding Does Not Induce NF-κB Inflammatory Signaling in Subcutaneous White Adipose Tissue. J Clin Endocrinol Metab 2020; 105:5813979. [PMID: 32232380 DOI: 10.1210/clinem/dgaa158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Accepted: 03/27/2020] [Indexed: 12/22/2022]
Abstract
CONTEXT It is unclear how white adipose tissue (WAT) inflammatory signaling proteins respond during the early stages of overnutrition. OBJECTIVE To investigate the effect of short-term, high-fat overfeeding on fasting abdominal subcutaneous WAT total content and phosphorylation of proteins involved in nuclear factor-κB (NF-κB) inflammatory signaling, systemic metabolic and inflammatory biomarkers. DESIGN Individuals consumed a high-fat (65% total energy from total fat), high-energy (50% above estimated energy requirements) diet for 7 days. RESULTS Fifteen participants (aged 27 ± 1 years; body mass index 24.4 ± 0.6 kg/m2) completed the study. Body mass increased following high-fat overfeeding (+1.2 ± 0.2 kg; P < 0.0001). However, total content and phosphorylation of proteins involved in NF-κB inflammatory signaling were unchanged following the intervention. Fasting serum glucose (+0.2 ± 0.0 mmol/L), total cholesterol (+0.4 ± 0.1 mmol/L), low-density lipoprotein cholesterol (+0.3 ± 0.1 mmol/L), high-density lipoprotein cholesterol (+0.2 ± 0.0 mmol/L), and lipopolysaccharide-binding protein (LBP; +4.7 ± 2.1 µg/mL) increased, whereas triacylglycerol concentrations (-0.2 ± 0.1 mmol/L) decreased following overfeeding (all P < 0.05). Systemic biomarkers (insulin, soluble cluster of differentiation 14 [CD14], C-reactive protein, interleukin-6, tumor necrosis factor-α and monocyte chemoattractant protein-1) and the proportion and concentration of circulating CD14+ monocytes were unaffected by overfeeding. CONCLUSION Acute lipid oversupply did not impact on total content or phosphorylation of proteins involved in WAT NF-κB inflammatory signaling, despite modest weight gain and metabolic alterations. Systemic LBP, which is implicated in the progression of low-grade inflammation during the development of obesity, increased in response to a 7-day high-fat overfeeding period.
Collapse
Affiliation(s)
- Rebecca Dewhurst-Trigg
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - Alex J Wadley
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - Rachel M Woods
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - Lauren B Sherar
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - Nicolette C Bishop
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - Carl J Hulston
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - Oonagh Markey
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
- Hugh Sinclair Unit of Human Nutrition, Department of Food and Nutritional Sciences, University of Reading, Reading, UK
| |
Collapse
|
26
|
Pearce K, Estanislao D, Fareed S, Tremellen K. Metabolic Endotoxemia, Feeding Studies and the Use of the Limulus Amebocyte (LAL) Assay; Is It Fit for Purpose? Diagnostics (Basel) 2020; 10:diagnostics10060428. [PMID: 32599766 PMCID: PMC7345849 DOI: 10.3390/diagnostics10060428] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 06/18/2020] [Accepted: 06/22/2020] [Indexed: 12/14/2022] Open
Abstract
The Limulus amebocyte assay (LAL) is increasingly used to quantify metabolic endotoxemia (ME), particularly in feeding studies. However, the assay was not intended to assess plasma at levels typically seen in ME. We aimed to optimize and validate the LAL assay under a range of pre-treatment conditions against the well-established lipopolysaccharide binding protein assay (LBP). Fifteen healthy overweight and obese males aged 28.8 ± 9.1years provided plasma. The LAL assay employed a range of pre-treatments; 70 °C for 15 and 30 min and 80 °C for 15 and 30 min, ultrasonication (70 °C for 10 min and then 40 °C for 10 min), and dilution (1:50, 1:75, 1:100, and 1:200 parts) or diluted using 0.5% pyrosperse. Seventeen different plasma pre-treatment methods employed prior to the use of the LAL analytical technique failed to show any relationships with either LBP, or body mass index (BMI; obesity), the biological trigger for ME (p > 0.05 for all). As expected, BMI positively correlated with LBP (r = 0.523, p = 0.052. No relationships were observed between LAL with any of the sample pre-treatments and LBP or BMI. In its current form, the LAL assay is unsuitable for detecting levels of endotoxin typically seen in ME.
Collapse
Affiliation(s)
- Karma Pearce
- Division of Health Sciences, School of Pharmacy and Medical Sciences & Alliance for Research in Exercise Nutrition and Activity (ARENA), University of South Australia, Adelaide SA 5001, Australia; (D.E.); (S.F.)
- Correspondence: ; Tel.: +61-8-830-21133 or +61-8-8302-2389
| | - Dianne Estanislao
- Division of Health Sciences, School of Pharmacy and Medical Sciences & Alliance for Research in Exercise Nutrition and Activity (ARENA), University of South Australia, Adelaide SA 5001, Australia; (D.E.); (S.F.)
| | - Sinan Fareed
- Division of Health Sciences, School of Pharmacy and Medical Sciences & Alliance for Research in Exercise Nutrition and Activity (ARENA), University of South Australia, Adelaide SA 5001, Australia; (D.E.); (S.F.)
| | - Kelton Tremellen
- Department of Obstetrics Gynaecology and Reproductive Medicine, Flinders University, Bedford Park SA 5042, Australia;
- Repromed IVF Adelaide, 180 Fullarton Road, Dulwich SA 5065, Australia
| |
Collapse
|
27
|
González-Quilen C, Rodríguez-Gallego E, Beltrán-Debón R, Pinent M, Ardévol A, Blay MT, Terra X. Health-Promoting Properties of Proanthocyanidins for Intestinal Dysfunction. Nutrients 2020; 12:E130. [PMID: 31906505 PMCID: PMC7019584 DOI: 10.3390/nu12010130] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 12/20/2019] [Accepted: 12/31/2019] [Indexed: 12/22/2022] Open
Abstract
The intestinal barrier is constantly exposed to potentially harmful environmental factors, including food components and bacterial endotoxins. When intestinal barrier function and immune homeostasis are compromised (intestinal dysfunction), inflammatory conditions may develop and impact overall health. Evidence from experimental animal and cell culture studies suggests that exposure of intestinal mucosa to proanthocyanidin (PAC)-rich plant products, such as grape seeds, may contribute to maintaining the barrier function and to ameliorating the pathological inflammation present in diet-induced obesity and inflammatory bowel disease. In this review, we aim to update the current knowledge on the bioactivity of PACs in experimental models of intestinal dysfunction and in humans, and to provide insights into the underlying biochemical and molecular mechanisms.
Collapse
Affiliation(s)
| | | | | | | | | | - M Teresa Blay
- MoBioFood Research Group, Departament de Bioquímica i Biotecnologia, Universitat Rovira i Virgili, 43007 Tarragona, Spain; (C.G.-Q.); (E.R.-G.); (R.B.-D.); (M.P.); (A.A.); (X.T.)
| | | |
Collapse
|
28
|
Sasaki GY, Li J, Cichon MJ, Riedl KM, Kopec RE, Bruno RS. Green Tea Extract Treatment in Obese Mice with Nonalcoholic Steatohepatitis Restores the Hepatic Metabolome in Association with Limiting Endotoxemia-TLR4-NFκB-Mediated Inflammation. Mol Nutr Food Res 2019; 63:e1900811. [PMID: 31574193 PMCID: PMC7293799 DOI: 10.1002/mnfr.201900811] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 09/18/2019] [Indexed: 12/15/2022]
Abstract
SCOPE Catechin-rich green tea extract (GTE) alleviates nonalcoholic steatohepatitis (NASH) by lowering endotoxin-TLR4 (Toll-like receptor-4)-NFκB (nuclear factor kappa-B) inflammation. This study aimed to define altered MS-metabolomic responses during high-fat (HF)-induced NASH that are restored by GTE utilizing livers from an earlier study in which GTE decreased endotoxin-TLR4-NFκB liver injury. METHODS AND RESULTS Mice are fed a low-fat (LF) or HF diet for 12 weeks and then randomized to LF or HF diets containing 0% or 2% GTE for an additional 8 weeks. Global MS-based metabolomics and targeted metabolite profiling of catechins/catechin metabolites are evaluated. GTE in HF mice restores hepatic metabolites implicated in dyslipidemia insulin resistance, and inflammation. These include 122 metabolites: amino acids, lipids, nucleotides, vitamins, bile acids, flavonoids, xenobiotics, and carbohydrates. Hepatic amino acids, B-vitamins, and bile acids are inversely correlated with biomarkers of insulin resistance, liver injury, steatosis, and inflammation. Further, phosphatidylcholine metabolites are positively correlated with biomarkers of liver injury and NFκB inflammation. Thirteen catechin metabolites are identified in livers of GTE-treated mice, mostly as phase II conjugates of parental catechins or microbial-derived valerolactones. CONCLUSION The defined anti-inflammatory/metabolic interactions advance an understanding of the mechanism by which GTE catechins protect against NFκB-mediated liver injury in NASH.
Collapse
Affiliation(s)
- Geoffrey Y Sasaki
- Human Nutrition Program, The Ohio State University, Columbus, OH, 43210, USA
| | - Jinhui Li
- Human Nutrition Program, The Ohio State University, Columbus, OH, 43210, USA
| | - Morgan J Cichon
- Personalized Food and Nutritional Metabolomics for Health, The Ohio State University, Columbus, OH, 43210, USA
| | - Ken M Riedl
- Nutrient and Phytochemical Analytics Shared Resource, The Ohio State University, Columbus, OH, 43210, USA
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, 43210, USA
| | - Rachel E Kopec
- Human Nutrition Program, The Ohio State University, Columbus, OH, 43210, USA
- Personalized Food and Nutritional Metabolomics for Health, The Ohio State University, Columbus, OH, 43210, USA
| | - Richard S Bruno
- Human Nutrition Program, The Ohio State University, Columbus, OH, 43210, USA
| |
Collapse
|
29
|
Komazin G, Maybin M, Woodard RW, Scior T, Schwudke D, Schombel U, Gisch N, Mamat U, Meredith TC. Substrate structure-activity relationship reveals a limited lipopolysaccharide chemotype range for intestinal alkaline phosphatase. J Biol Chem 2019; 294:19405-19423. [PMID: 31704704 DOI: 10.1074/jbc.ra119.010836] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 10/31/2019] [Indexed: 12/21/2022] Open
Abstract
Lipopolysaccharide (LPS) from the Gram-negative bacterial outer membrane potently activates the human innate immune system. LPS is recognized by the Toll-like receptor 4/myeloid differentiation factor-2 (TLR4/MD2) complex, leading to the release of pro-inflammatory cytokines. Alkaline phosphatase (AP) is currently being investigated as an anti-inflammatory agent for detoxifying LPS through dephosphorylating lipid A, thus providing a potential treatment for managing both acute (sepsis) and chronic (metabolic endotoxemia) pathologies wherein aberrant TLR4/MD2 activation has been implicated. Endogenous LPS preparations are chemically heterogeneous, and little is known regarding the LPS chemotype substrate range of AP. Here, we investigated the activity of AP on a panel of structurally defined LPS chemotypes isolated from Escherichia coli and demonstrate that calf intestinal AP (cIAP) has only minimal activity against unmodified enteric LPS chemotypes. Pi was only released from a subset of LPS chemotypes harboring spontaneously labile phosphoethanolamine (PEtN) modifications connected through phosphoanhydride bonds. We demonstrate that the spontaneously hydrolyzed O-phosphorylethanolamine is the actual substrate for AP. We found that the 1- and 4'-lipid A phosphate groups critical in TLR4/MD2 signaling become susceptible to hydrolysis only after de-O-acylation of ester linked primary acyl chains on lipid A. Furthermore, PEtN modifications on lipid A specifically enhanced hTLR4 agonist activity of underacylated LPS preparations. Computational binding models are proposed to explain the limitation of AP substrate specificity imposed by the acylation state of lipid A, and the mechanism of PEtN in enhancing hTLR4/MD2 signaling.
Collapse
Affiliation(s)
- Gloria Komazin
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Michael Maybin
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Ronald W Woodard
- Department of Medicinal Chemistry, University of Michigan, Ann Arbor, Michigan 48109
| | - Thomas Scior
- Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Puebla 72000, Mexico
| | - Dominik Schwudke
- Bioanalytical Chemistry, Priority Research Area Infections, Research Center Borstel, Leibniz Lung Center, 23845 Borstel, Germany
| | - Ursula Schombel
- Bioanalytical Chemistry, Priority Research Area Infections, Research Center Borstel, Leibniz Lung Center, 23845 Borstel, Germany
| | - Nicolas Gisch
- Bioanalytical Chemistry, Priority Research Area Infections, Research Center Borstel, Leibniz Lung Center, 23845 Borstel, Germany
| | - Uwe Mamat
- Cellular Microbiology, Priority Research Area Infections, Research Center Borstel, Leibniz Lung Center, 23845 Borstel, Germany
| | - Timothy C Meredith
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802
| |
Collapse
|
30
|
Fuke N, Nagata N, Suganuma H, Ota T. Regulation of Gut Microbiota and Metabolic Endotoxemia with Dietary Factors. Nutrients 2019; 11:E2277. [PMID: 31547555 DOI: 10.3390/nu11102277] [Citation(s) in RCA: 137] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 09/13/2019] [Accepted: 09/18/2019] [Indexed: 02/08/2023] Open
Abstract
Metabolic endotoxemia is a condition in which blood lipopolysaccharide (LPS) levels are elevated, regardless of the presence of obvious infection. It has been suggested to lead to chronic inflammation-related diseases such as obesity, type 2 diabetes mellitus, non-alcoholic fatty liver disease (NAFLD), pancreatitis, amyotrophic lateral sclerosis, and Alzheimer’s disease. In addition, it has attracted attention as a target for the prevention and treatment of these chronic diseases. As metabolic endotoxemia was first reported in mice that were fed a high-fat diet, research regarding its relationship with diets has been actively conducted in humans and animals. In this review, we summarize the relationship between fat intake and induction of metabolic endotoxemia, focusing on gut dysbiosis and the influx, kinetics, and metabolism of LPS. We also summarize the recent findings about dietary factors that attenuate metabolic endotoxemia, focusing on the regulation of gut microbiota. We hope that in the future, control of metabolic endotoxemia using dietary factors will help maintain human health.
Collapse
|
31
|
Guevara-Cruz M, Flores-López AG, Aguilar-López M, Sánchez-Tapia M, Medina-Vera I, Díaz D, Tovar AR, Torres N. Improvement of Lipoprotein Profile and Metabolic Endotoxemia by a Lifestyle Intervention That Modifies the Gut Microbiota in Subjects With Metabolic Syndrome. J Am Heart Assoc 2019; 8:e012401. [PMID: 31451009 PMCID: PMC6755842 DOI: 10.1161/jaha.119.012401] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Background Metabolic syndrome (MetS) is a serious health problem over the world; thus, the aim of the present work was to develop a lifestyle intervention to decrease the dysbiosis of gut microbiota and reduce the biochemical abnormalities of MetS. Methods and Results The prevalence of MetS was evaluated in 1065 subjects of Mexico City, Mexico, and the gut microbiota in a subsample. Subjects with MetS were selected for a pragmatic study based on a lifestyle intervention with a low-saturated-fat diet, reduced-energy intake, with functional foods and physical activity, and a second group was selected for a randomized control-placebo study to assess the gut microbiota after the dietary intervention. Prevalence of MetS was 53%, and the higher the body mass index, the higher the gut microbiota dysbiosis. The higher the Homeostatic Model Assessment for Insulin Resistance, the lower the high-density lipoprotein cholesterol concentration. The pragmatic study revealed that after 15 days on a low-saturated-fat diet, there was a 24% reduction in serum triglycerides; and after a 75-day lifestyle intervention, MetS was reduced by 44.8%, with a reduction in low-density lipoprotein cholesterol, small low-density lipoprotein particles, glucose intolerance, lipopolysaccharide, and branched-chain amino acid. The randomized control-placebo study showed that after the lifestyle intervention, there was a decrease in the dysbiosis of the gut microbiota associated with a reduction in the Prevotella/ Bacteroides ratio and an increase in the abundance of Akkermansia muciniphila and Faecalibacterium prausnitzii. Conclusions A lifestyle intervention significantly decreased MetS components, small low-density lipoprotein particle concentration, gut microbiota dysbiosis, and metabolic endotoxemia, reducing the risk of atherosclerosis. Clinical Trial Registration URL: https://www.clinicaltrials.gov. Unique identifier: NCT03611140.
Collapse
Affiliation(s)
- Martha Guevara-Cruz
- Departamento de Fisiología de la Nutrición Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán Mexico City Mexico
| | - Adriana G Flores-López
- Departamento de Fisiología de la Nutrición Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán Mexico City Mexico
| | - Miriam Aguilar-López
- Departamento de Fisiología de la Nutrición Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán Mexico City Mexico
| | - Mónica Sánchez-Tapia
- Departamento de Fisiología de la Nutrición Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán Mexico City Mexico
| | - Isabel Medina-Vera
- Departamento de Fisiología de la Nutrición Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán Mexico City Mexico
| | - Daniel Díaz
- Centro de Ciencias de la Complejidad Universidad Nacional Autónoma de México Mexico City Mexico
| | - Armando R Tovar
- Departamento de Fisiología de la Nutrición Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán Mexico City Mexico
| | - Nimbe Torres
- Departamento de Fisiología de la Nutrición Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán Mexico City Mexico
| |
Collapse
|
32
|
Torquati L, Coombes JS, Murray L, Hasnain SZ, Mallard AR, McGuckin MA, Fassett RG, Croci I, Ramos JS. Fibre Intake Is Independently Associated with Increased Circulating Interleukin-22 in Individuals with Metabolic Syndrome. Nutrients 2019; 11:E815. [PMID: 30978932 PMCID: PMC6520738 DOI: 10.3390/nu11040815] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 04/02/2019] [Accepted: 04/06/2019] [Indexed: 12/23/2022] Open
Abstract
The positive effects of dietary fibre on gut barrier function and inflammation have not been completely elucidated. Mice studies show gut barrier disruption and diet-induced insulin resistance can be alleviated by cytokine interleukin-22 (IL-22). However, little is known about IL-22 in humans and its association with gut-beneficial nutrients like fibre. We investigated whether fibre intake was associated with circulating levels of IL-22 in 48 participants with metabolic syndrome (MetS). Bivariate analysis was used to explore associations between circulating IL-22, fibre intake, MetS factors, body composition, and cardiorespiratory fitness (peak oxygen uptake, V ˙ O2peak). Hierarchical multiple regression (HMR) was used to test the independent association of fibre intake with circulating IL-22, adjusting for variables correlated with IL-22. Circulating IL-22 was positively associated with fibre intake (rs = 0.393, p < 0.006). The HMR-adjusted model explained 40% of circulating IL-22 variability, and fibre intake significantly improved the prediction model by 8.4% (p < 0.022). Participants with fibre intake above median intake of 21.5 g/day had a significantly higher circulating IL-22 than the lower intake group (308.3 ± 454.4 vs. 69.0 ± 106.4 pg/mL, p < 0.019). Fibre intake is independently associated with increased circulating IL-22 in individuals with MetS. Findings warrant further investigations to evaluate whether changes in dietary fibre intake alter circulating IL-22, and its effects on health outcomes.
Collapse
Affiliation(s)
- Luciana Torquati
- School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia.
- School of Sport and Health Sciences, University of Exeter, Exeter EX4 4PY, UK.
| | - Jeff S Coombes
- School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia.
| | - Lydia Murray
- Inflammatory Disease Biology and Therapeutics Group/Immunopathology Group, Translational Research Institute, The University of Queensland, Brisbane, Queensland 4072, Australia.
| | - Sumaira Z Hasnain
- Inflammatory Disease Biology and Therapeutics Group/Immunopathology Group, Translational Research Institute, The University of Queensland, Brisbane, Queensland 4072, Australia.
- Australian Infectious Disease Research Centre, The University of Queensland, Brisbane, Queensland 4072, Australia.
| | - Alistair R Mallard
- School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia.
| | - Michael A McGuckin
- Inflammatory Disease Biology and Therapeutics Group/Immunopathology Group, Translational Research Institute, The University of Queensland, Brisbane, Queensland 4072, Australia.
- Faculty of Medicine, Dentistry and Health Science, The University of Melbourne, Parkville, Victoria 3010, Australia.
| | - Robert G Fassett
- School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia.
| | - Ilaria Croci
- School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia.
- K.G. Jebsen Center of Exercise in Medicine, Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology, 7491 Trondheim, Norway.
| | - Joyce S Ramos
- School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia.
- SHAPE Research Centre, Exercise Science and Clinical Exercise Physiology, College of Nursing and Health Sciences, Flinders University, Bedford Park, South Australia 5042, Australia.
| |
Collapse
|
33
|
Xu L, Nagata N, Ota T. Glucoraphanin: a broccoli sprout extract that ameliorates obesity-induced inflammation and insulin resistance. Adipocyte 2018; 7:218-225. [PMID: 29898626 PMCID: PMC6261473 DOI: 10.1080/21623945.2018.1474669] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Accepted: 05/03/2018] [Indexed: 01/03/2023] Open
Abstract
Obesity is a low-grade sustained inflammatory state that causes oxidative stress in different metabolic tissues, which leads to insulin resistance and nonalcoholic fatty liver disease (NAFLD). Particularly, obesity-induced metabolic endotoxemia plays an important role in the pathogenesis of insulin resistance and inflammation. Nuclear factor erythroid 2-related factor 2 (Nrf2) is a key regulator of antioxidant signaling that serves as a primary cellular defense against the cytotoxic effects of oxidative stress. Pharmacological stimulation of Nrf2 mitigates obesity and insulin resistance in mice; however, Nrf2 activators are not clinically available due to biosafety concerns. A recent study demonstrated that glucoraphanin, a precursor of the Nrf2 activator sulforaphane, ameliorates obesity by enhancing energy expenditure and browning of white adipose tissue, and attenuates obesity-related inflammation and insulin resistance by polarizing M2 macrophages and reducing metabolic endotoxemia. Thus, this review focuses on the efficiency and safety of glucoraphanin in alleviating obesity, insulin resistance, and NAFLD. Abbreviations: ALT, Alanine aminotransferase; AMPK, AMP-activated protein kinase; ATMs, Adipose tissue macrophages; BAT, Brown adipose tissue; CDDO-Im, 2-cyano-3,12-dioxoolean-1,9-dien-28-oic acid-imidazolide; CDDO-Me, CDDO-methyl ester; DIO, High-fat-diet-induced obese; FFA, Free fatty acid; FGF, Fibroblast growth factor; GTP, Glutamyl transpeptidase; HFD, High-fat diet; IKKβ, Inhibitor of κB-kinase β; IL, Interleukin; JNK, C-Jun N-terminal kinase; KD, Knockdown; Keap1, Kelch-like ECH-associated protein 1; KO, Knockout; LPS, Lipopolysaccharide; NADPH, Nicotinamide adenine dinucleotide phosphate; NAFLD, Non-alcoholic fatty liver disease; NF-κB, Nuclear factor-κB; Nrf2, Nuclear factor E2-related factor 2; ROS, Reactive oxygen species; T2D, Type 2 diabetes; TLR, Toll-like receptor; TNF, tumor necrosis factor; UCP, Uncoupling protein; WAT, White adipose tissue.
Collapse
Affiliation(s)
- Liang Xu
- Department of Cell Metabolism and Nutrition, Advanced Preventive Medical Sciences Research Center, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Naoto Nagata
- Department of Cell Metabolism and Nutrition, Advanced Preventive Medical Sciences Research Center, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Tsuguhito Ota
- Department of Cell Metabolism and Nutrition, Advanced Preventive Medical Sciences Research Center, Kanazawa University, Kanazawa, Ishikawa, Japan
- Division of Metabolism and Biosystemic Science, Department of Medicine, Asahikawa Medical University, Asahikawa, Hokkaido, Japan
| |
Collapse
|
34
|
Meidan E, Kolesnikov Y, Tirosh O. High Fat Diets Composed of Palm Stearin and Olive Oil Equally Exacerbate Liver Inflammatory Damage and Metabolic Stress in Mice. Mol Nutr Food Res 2018; 62:e1700915. [PMID: 29733507 DOI: 10.1002/mnfr.201700915] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 04/22/2018] [Indexed: 12/15/2022]
Abstract
SCOPE People with fatty liver could be subject to acute infections such as sepsis. The aim of the study is to evaluate the effect of high fat diets (HFD) of olive oil and palm stearin on liver inflammation induced by lipopolysaccharides (LPS). METHODS AND RESULTS C57BL/6J male mice were treated with high fat diets with different sources of oils: palm stearin and olive oil for 8 weeks followed by LPS injection. The proinflammatory effect of olive oil was also studied using gavage treatment and IP injection of LPS. Animals fed with HFDs showed an increase in body weight, elevated blood glucose levels, and fatty liver phenotype. HFDs aggravated the effect of LPS treatment to induce inflammatory response compared to low fat diet (LFD) effect. Following HFD supplementation, LPS induced hyperinsulinemia, more liver damage than in animals that consumed LFD. In addition, both gavage and long-term feeding with high lipids in the presence of LPS resulted in inhibition of gluconeogenic genes expression. CONCLUSION HFDs of both monounsaturated and saturated fat potentiated liver inflammation induced by LPS treatment indicate that the total amount of fat consumed is the main proinflammatory factor rather than the type of fat.
Collapse
Affiliation(s)
- Elena Meidan
- Institute of Biochemistry, Food Science and Nutrition, Hebrew University of Jerusalem, Rehovot, 7610001, Israel
| | - Yula Kolesnikov
- Institute of Biochemistry, Food Science and Nutrition, Hebrew University of Jerusalem, Rehovot, 7610001, Israel
| | - Oren Tirosh
- Institute of Biochemistry, Food Science and Nutrition, Hebrew University of Jerusalem, Rehovot, 7610001, Israel
| |
Collapse
|
35
|
Gao X, Xie Q, Kong P, Liu L, Sun S, Xiong B, Huang B, Yan L, Sheng J, Xiang H. Polyphenol- and Caffeine-Rich Postfermented Pu-erh Tea Improves Diet-Induced Metabolic Syndrome by Remodeling Intestinal Homeostasis in Mice. Infect Immun. 2018;86. [PMID: 29061705 DOI: 10.1128/iai.00601-17] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Accepted: 10/06/2017] [Indexed: 02/06/2023] Open
Abstract
Postfermented Pu-erh tea (PE) protects against metabolic syndrome (MS), but little is known regarding its underlying mechanisms. Animal experiments were performed to determine whether the gut microbiota mediated the improvement in diet-induced MS by PE and its main active components (PEAC). We confirmed that PE altered the body composition and energy efficiency, attenuated metabolic endotoxemia and systemic and multiple-tissue inflammation, and improved the glucose and lipid metabolism disorder in high-fat diet (HFD)-fed mice via multiple pathways. Notably, PE promoted the lipid oxidation and browning of white adipose tissue (WAT) in HFD-fed mice. Polyphenols and caffeine (CAF) played critical roles in improving these parameters. Meanwhile, PE remodeled the disrupted intestinal homeostasis that was induced by the HFD. Many metabolic changes observed in the mice were significantly correlated with alterations in specific gut bacteria. Akkermansia muciniphila and Faecalibacterium prausnitzii were speculated to be the key gut bacterial links between the PEAC treatment and MS at the genus and species levels. Interestingly, A. muciniphila administration altered body composition and energy efficiency, promoted the browning of WAT, and improved the lipid and glucose metabolism disorder in the HFD-fed mice, whereas F. prausnitzii administration reduced the HFD-induced liver and intestinal inflammatory responses. In summary, polyphenol- and CAF-rich PE improved diet-induced MS, and this effect was associated with a remodeling of the gut microbiota.
Collapse
|
36
|
Abstract
Multiple sclerosis is a multifaceted inflammatory-autoimmune disease, which shows remarkable heterogeneity in its clinical presentation, disease progression and in tissue lesions in the CNS. Focal lesions in white matter consist of immune effector cells, antibodies, and complement deposits in varying combinations, suggesting that immune mechanisms related to CNS pathology are multiple. Although adaptive immunity to myelin antigens is essential in MS pathogenesis, innate immune mechanisms are likely involved in its initiation and perpetuation. One key question is if recognition of infectious agents and microbial products by innate immune mechanisms impacts on MS and if so, how and where? This short review aims at conceptualizing how interactions between microbes and innate immune mechanisms could contribute to MS pathogenesis. Consideration is given to initiation of local inflammation and to myelin-specific immune responses, and how innate immunity and microbes may contribute to these. Recent advances in our understanding of lymphatic drainage of CNS, its immune surveillance and effects of gut microbiota and obesity on systemic endotoxin levels and T-cell priming may open new perspectives to understanding the roles that infectious agents and microbes may have in MS.
Collapse
Affiliation(s)
- A. Hänninen
- Department of Medical Microbiology and Immunology; University of Turku; Turku University Hospital; Diagnostic and Related Services, Hospital District of Southwest Finland; Turku Finland
| |
Collapse
|
37
|
Singh DP, Khare P, Bijalwan V, Baboota RK, Singh J, Kondepudi KK, Chopra K, Bishnoi M. Coadministration of isomalto-oligosaccharides augments metabolic health benefits of cinnamaldehyde in high fat diet fed mice. Biofactors 2017; 43:821-835. [PMID: 28799667 DOI: 10.1002/biof.1381] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 07/04/2017] [Accepted: 07/04/2017] [Indexed: 01/05/2023]
Abstract
Bacteriostatic properties of a potential anti-obesity agent cinnamaldehyde (CMN) may present untoward effects on the resident gut microbiota. Here, we evaluated whether the combination of Isomalto-oligosaccharides (IMOs) with CMN prevents unwanted effects of CMN on gut microbiota and associated metabolic outcomes in HFD-fed mice. Male Swiss albino mice divided into four groups (n = 10), were fed on normal chow, or HFD (58% fat kcal), HFD + CMN (10 mg kg-1 ) and HFD + CMN (10 mg kg-1 ) + IMOs (1 g kg-1 ) for 12 weeks. Effects on HFD-induced biochemical, histological, inflammatory and genomic changes in the gastrointestinal tract, liver, and visceral white adipose tissue were studied. Cosupplementation of CMN with IMOs potentiates its preventive action against HFD-induced increase in serum LPS and abundances of selected LPS producing bacteria (Enterobacteriaceae, Escherichia Coli, Cronobacter sp, Citrobacter sp., Klebsiella sp., Salmonella sp.). CMN and IMOs co-administration prevented HFD-induced decrease in selected beneficial gut bacterial abundances (Bifidobacteria, Roseburia sp., Akkermansia muciniphila, Feacalibacterium sp.). CMN's effects against HFD-induced increase in gut permeability, histological and inflammatory changes in the colon were further augmented by cosupplementation of IMOs. Similar effects were observed in hepatic inflammatory markers. Cosupplementation of CMN with IMOs and CMN alone administration prevented HFD-induced changes in peripheral hormones and lipid metabolism-related parameters. This study provides evidence that coadministration of IMOs with CMN potentiates its anti-obesity effect and limits the side effects of CMN on gastrointestinal flora. Further, this study gives us important direction for the development of a concept-based novel class of functional foods/nutraceuticals for improved metabolic health. © BioFactors, 43(6):821-835, 2017.
Collapse
Affiliation(s)
- Dhirendra Pratap Singh
- Food and Nutritional Biotechnology Division, National Agri-Food Biotechnology Institute (NABI), S.A.S. Nagar (Mohali), Punjab, India
- Pharmacology Division, University Institute of Pharmaceutical Sciences (UIPS), Punjab University, Chandigarh, India
| | - Pragyanshu Khare
- Food and Nutritional Biotechnology Division, National Agri-Food Biotechnology Institute (NABI), S.A.S. Nagar (Mohali), Punjab, India
- Pharmacology Division, University Institute of Pharmaceutical Sciences (UIPS), Punjab University, Chandigarh, India
| | - Vandana Bijalwan
- Food and Nutritional Biotechnology Division, National Agri-Food Biotechnology Institute (NABI), S.A.S. Nagar (Mohali), Punjab, India
| | - Ritesh Kumar Baboota
- Food and Nutritional Biotechnology Division, National Agri-Food Biotechnology Institute (NABI), S.A.S. Nagar (Mohali), Punjab, India
| | - Jagdeep Singh
- Food and Nutritional Biotechnology Division, National Agri-Food Biotechnology Institute (NABI), S.A.S. Nagar (Mohali), Punjab, India
| | - Kanthi Kiran Kondepudi
- Food and Nutritional Biotechnology Division, National Agri-Food Biotechnology Institute (NABI), S.A.S. Nagar (Mohali), Punjab, India
| | - Kanwaljit Chopra
- Pharmacology Division, University Institute of Pharmaceutical Sciences (UIPS), Punjab University, Chandigarh, India
| | - Mahendra Bishnoi
- Food and Nutritional Biotechnology Division, National Agri-Food Biotechnology Institute (NABI), S.A.S. Nagar (Mohali), Punjab, India
| |
Collapse
|
38
|
Leite AZ, Rodrigues NDC, Gonzaga MI, Paiolo JCC, de Souza CA, Stefanutto NAV, Omori WP, Pinheiro DG, Brisotti JL, Matheucci Junior E, Mariano VS, de Oliveira GLV. Detection of Increased Plasma Interleukin-6 Levels and Prevalence of Prevotella copri and Bacteroides vulgatus in the Feces of Type 2 Diabetes Patients. Front Immunol 2017; 8:1107. [PMID: 28966614 PMCID: PMC5605568 DOI: 10.3389/fimmu.2017.01107] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Accepted: 08/23/2017] [Indexed: 12/30/2022] Open
Abstract
Intestinal dysbiosis and metabolic endotoxemia have been associated with metabolic disorders, such as obesity, insulin resistance, and type 2 diabetes (T2D). The main goal of the present study was to evaluate the intestinal dysbiosis in Brazilian T2D patients and correlate these data with inflammatory cytokines and lipopolysaccharides (LPS) plasma concentrations. This study was approved by the Ethics Committees from Barretos Cancer Hospital and all individuals signed the informed consent form. Stool samples were required for DNA extraction, and the V3/V4 regions of bacterial 16S were sequenced using an Illumina platform. Peripheral blood was used to quantify inflammatory cytokines and plasma LPS concentrations, by CBA flex and ELISA, respectively. Statistical analyses were performed using Mann–Whitney and Spearman’s tests. Analysis of variance, diversity indexes, and analysis of alpha- and beta-diversity were conducted using an annotated Operational Taxonomic Unit table. This study included 20 patients and 22 controls. We observed significant differences (P < 0.01) in the microbiota composition (beta-diversity) between patients and controls, suggesting intestinal dysbiosis in Brazilian T2D patients. The prevalent species found in patients’ feces were the Gram-negatives Prevotella copri, Bacteroides vulgatus, Bacteroides rodentium, and Bacteroides xylanisolvens. The proinflammatory interleukin-6 (IL-6) was significantly increased (P < 0.05) in patients’ plasma and LPS levels were decreased. We find correlations between the proinflammatory interferon-gamma with Gram-negatives Bacteroides and Prevotella species, and a positive correlation between the LPS levels and P. copri reads. The P. copri and B. vulgatus species were associated with insulin resistance in previous studies. In this study, we suggested that the prevalence of Gram-negative species in the gut and the increased plasma IL-6 in patients could be linked to low-grade inflammation and insulin resistance. In conclusion, the P. copri and B. vulgatus species could represent an intestinal microbiota signature, associated with T2D development. Furthermore, the identification of these Gram-negative bacteria, and the detection of inflammatory markers, such as increased IL-6, could be used as diabetes predictive markers in overweight, obese and in genetically predisposed individuals to develop T2D.
Collapse
Affiliation(s)
- Aline Zazeri Leite
- Microbiome Study Group, School of Health Sciences Dr. Paulo Prata (FACISB), Barretos, Brazil
| | | | - Marina Ignácio Gonzaga
- Microbiome Study Group, School of Health Sciences Dr. Paulo Prata (FACISB), Barretos, Brazil
| | | | | | | | - Wellington Pine Omori
- Department of Technology, School of Agricultural and Veterinarian Sciences, São Paulo State University (UNESP), Sao Paulo, Brazil
| | - Daniel Guariz Pinheiro
- Department of Technology, School of Agricultural and Veterinarian Sciences, São Paulo State University (UNESP), Sao Paulo, Brazil
| | - João Luiz Brisotti
- Microbiome Study Group, School of Health Sciences Dr. Paulo Prata (FACISB), Barretos, Brazil
| | - Euclides Matheucci Junior
- DNA Consult Genetics and Biotechnology, Sao Carlos, Brazil.,Biotechnology Department, Sao Carlos Federal University, UFSCAR, Sao Carlos, Brazil
| | | | | |
Collapse
|
39
|
Guerville M, Leroy A, Sinquin A, Laugerette F, Michalski MC, Boudry G. Western-diet consumption induces alteration of barrier function mechanisms in the ileum that correlates with metabolic endotoxemia in rats. Am J Physiol Endocrinol Metab 2017; 313:E107-E120. [PMID: 28400412 DOI: 10.1152/ajpendo.00372.2016] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 04/03/2017] [Accepted: 04/04/2017] [Indexed: 12/11/2022]
Abstract
Obesity and its related disorders have been associated with the presence in the blood of gut bacteria-derived lipopolysaccharides (LPS). However, the factors underlying this low-grade elevation in plasma LPS, so-called metabolic endotoxemia, are not fully elucidated. We aimed to investigate the effects of Western diet (WD) feeding on intestinal and hepatic LPS handling mechanisms in a rat model of diet-induced obesity (DIO). Rats were fed either a standard chow diet (C) or a Western Diet (WD, 45% fat) for 6 wk. They were either fed ad libitum or pair-fed to match the caloric intake of C rats for the first week, then fed ad libitum for the remaining 5 wk. Six-week WD feeding led to a mild obese phenotype with increased adiposity and elevated serum LPS-binding protein (LBP) levels relative to C rats, irrespective of initial energy intake. Serum LPS was not different between dietary groups but exhibited strong variability. Disrupted ileal mucus secretion and decreased ileal Reg3-γ and -β gene expression along with high ileal permeability to LPS were observed in WD compared with C-fed rats. Ileal and cecal intestinal alkaline phosphatase (IAP) activity as well as Verrucomicrobia and Bifidobacterium cecal levels were increased in WD-fed rats compared with C-fed rats. WD consumption did not impact mRNA levels of LPS-handling hepatic enzymes. Correlation analysis revealed that ileal passage of LPS, IAP activity, Proteobacteria levels and hepatic aoah gene expression correlated with serum LPS and LBP, suggesting that ileal mucosal defense impairment induced by WD feeding contribute to metabolic endotoxemia.
Collapse
Affiliation(s)
- Mathilde Guerville
- Institut Numecan INRA INSERM Université de Rennes 1, Saint-Gilles, France; and
| | - Anaïs Leroy
- Institut Numecan INRA INSERM Université de Rennes 1, Saint-Gilles, France; and
| | - Annaëlle Sinquin
- Institut Numecan INRA INSERM Université de Rennes 1, Saint-Gilles, France; and
| | - Fabienne Laugerette
- Univ-Lyon, CarMeN Laboratory, INRA U1397, Université Claude Bernard Lyon 1, Inserm U1060, INSA Lyon, Villeurbanne, France
| | - Marie-Caroline Michalski
- Univ-Lyon, CarMeN Laboratory, INRA U1397, Université Claude Bernard Lyon 1, Inserm U1060, INSA Lyon, Villeurbanne, France
| | - Gaëlle Boudry
- Institut Numecan INRA INSERM Université de Rennes 1, Saint-Gilles, France; and
| |
Collapse
|
40
|
Cândido FG, Valente FX, Grześkowiak ŁM, Moreira APB, Rocha DMUP, Alfenas RDCG. Impact of dietary fat on gut microbiota and low-grade systemic inflammation: mechanisms and clinical implications on obesity. Int J Food Sci Nutr 2017; 69:125-143. [PMID: 28675945 DOI: 10.1080/09637486.2017.1343286] [Citation(s) in RCA: 144] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Dietary fat strongly affects human health by modulating gut microbiota composition and low-grade systemic inflammation. High-fat diets have been implicated in reduced gut microbiota richness, increased Firmicutes to Bacteroidetes ratio, and several changes at family, genus and species levels. Saturated (SFA), monounsaturated (MUFA), polyunsaturated (PUFA) and conjugated linolenic fatty acids share important pathways of immune system activation/inhibition with gut microbes, modulating obesogenic and proinflammatory profiles. Mechanisms that link dietary fat, gut microbiota and obesity are mediated by increased intestinal permeability, systemic endotoxemia, and the activity of the endocannabinoid system. Although the probiotic therapy could be a complementary strategy to improve gut microbiota composition, it did not show permanent effects to treat fat-induced dysbiosis. Based upon evidence to date, we believe that high-fat diets and SFA consumption should be avoided, and MUFA and omega-3 PUFA intake should be encouraged in order to regulate gut microbiota and inflammation, promoting body weight/fat control.
Collapse
Affiliation(s)
- Flávia Galvão Cândido
- a Departamento de Nutrição e Saúde , Universidade Federal de Viçosa , Viçosa , Brazil
| | - Flávia Xavier Valente
- a Departamento de Nutrição e Saúde , Universidade Federal de Viçosa , Viçosa , Brazil
| | | | | | | | | |
Collapse
|
41
|
Kang C, Wang B, Kaliannan K, Wang X, Lang H, Hui S, Huang L, Zhang Y, Zhou M, Chen M, Mi M. Gut Microbiota Mediates the Protective Effects of Dietary Capsaicin against Chronic Low-Grade Inflammation and Associated Obesity Induced by High-Fat Diet. mBio 2017; 8:e00470-17. [PMID: 28536285 DOI: 10.1128/mBio.00470-17] [Citation(s) in RCA: 137] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Metabolic endotoxemia originating from dysbiotic gut microbiota has been identified as a primary mediator for triggering the chronic low-grade inflammation (CLGI) responsible for the development of obesity. Capsaicin (CAP) is the major pungent bioactivator in chili peppers and has potent anti-obesity functions, yet the mechanisms linking this effect to gut microbiota remain obscure. Here we show that mice fed a high-fat diet (HFD) supplemented with CAP exhibit lower levels of metabolic endotoxemia and CLGI associated with lower body weight gain. High-resolution responses of the microbiota were examined by 16S rRNA sequencing, short-chain fatty acid (SCFA) measurements, and phylogenetic reconstruction of unobserved states (PICRUSt) analysis. The results showed, among others, that dietary CAP induced increased levels of butyrate-producing Ruminococcaceae and Lachnospiraceae, while it caused lower levels of members of the lipopolysaccharide (LPS)-producing family S24_7. Predicted function analysis (PICRUSt) showed depletion of genes involved in bacterial LPS synthesis in response to CAP. We further identified that inhibition of cannabinoid receptor type 1 (CB1) by CAP also contributes to prevention of HFD-induced gut barrier dysfunction. Importantly, fecal microbiota transplantation experiments conducted in germfree mice demonstrated that dietary CAP-induced protection against HFD-induced obesity is transferrable. Moreover, microbiota depletion by a cocktail of antibiotics was sufficient to block the CAP-induced protective phenotype against obesity, further suggesting the role of microbiota in this context. Together, our findings uncover an interaction between dietary CAP and gut microbiota as a novel mechanism for the anti-obesity effect of CAP acting through prevention of microbial dysbiosis, gut barrier dysfunction, and chronic low-grade inflammation. Metabolic endotoxemia due to gut microbial dysbiosis is a major contributor to the pathogenesis of chronic low-grade inflammation (CLGI), which primarily mediates the development of obesity. A dietary strategy to reduce endotoxemia appears to be an effective approach for addressing the issue of obesity. Capsaicin (CAP) is the major pungent component in red chili (genus Capsicum). Little is known about the role of gut microbiota in the anti-obesity effect of CAP. High-throughput 16S rRNA gene sequencing revealed that CAP significantly increased butyragenic bacteria and decreased LPS-producing bacteria (e.g., members of the S24-7 family) and LPS biosynthesis. By using antibiotics and microbiota transplantation, we prove that gut microbiota plays a causal role in dietary CAP-induced protective phenotype against high-fat-diet-induced CLGI and obesity. Moreover, CB1 inhibition was partially involved in the beneficial effect of CAP. Together, these data suggest that the gut microbiome is a critical factor for the anti-obesity effects of CAP.
Collapse
|
42
|
Guerville M, Boudry G. Gastrointestinal and hepatic mechanisms limiting entry and dissemination of lipopolysaccharide into the systemic circulation. Am J Physiol Gastrointest Liver Physiol 2016; 311:G1-G15. [PMID: 27151941 DOI: 10.1152/ajpgi.00098.2016] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Accepted: 04/30/2016] [Indexed: 01/31/2023]
Abstract
The human microbiota consists of 100 trillion microorganisms that provide important metabolic and biological functions benefiting the host. However, the presence in host plasma of a gut-derived bacteria component, the lipopolysaccharide (LPS), has been identified as a causal or complicating factor in multiple serious diseases such as sepsis and septic shock and, more recently, obesity-associated metabolic disorders. Understanding the precise mechanisms by which gut-derived LPS is transported from the gut lumen to the systemic circulation is crucial to advance our knowledge of LPS-associated diseases and elaborate targeted strategies for their prevention. The aim of this review is to synthetize current knowledge on the host mechanisms limiting the entry and dissemination of LPS into the systemic circulation. To prevent bacterial colonization and penetration, the intestinal epithelium harbors multiple defense mechanisms including the secretion of antimicrobial peptides and mucins as well as detoxification enzymes. Despite this first line of defense, LPS can reach the apical site of intestinal epithelial cells (IECs) and, because of its large size, likely crosses IECs via transcellular transport, either lipid raft- or clathrin-mediated endocytosis or goblet cell-associated passage. However, the precise pathway remains poorly described. Finally, if LPS crosses the gut mucosa, it is directed via the portal vein to the liver, where major detoxification processes occur by deacetylation and excretion through the bile. If this disposal process is not sufficient, LPS enters the systemic circulation, where it is handled by numerous transport proteins that clear it back to the liver for further excretion.
Collapse
Affiliation(s)
| | - Gaëlle Boudry
- INRA UR1341 ADNC, Domaine de la Prise, Saint-Gilles, France
| |
Collapse
|
43
|
Heyman-Lindén L, Kotowska D, Sand E, Bjursell M, Plaza M, Turner C, Holm C, Fåk F, Berger K. Lingonberries alter the gut microbiota and prevent low-grade inflammation in high-fat diet fed mice. Food Nutr Res 2016; 60:29993. [PMID: 27125264 PMCID: PMC4850145 DOI: 10.3402/fnr.v60.29993] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 02/16/2016] [Accepted: 02/17/2016] [Indexed: 12/15/2022] Open
Abstract
Background The gut microbiota plays an important role in the development of obesity and obesity-associated impairments such as low-grade inflammation. Lingonberries have been shown to prevent diet-induced obesity and low-grade inflammation. However, it is not known whether the effect of lingonberry supplementation is related to modifications of the gut microbiota. The aim of the present study was to describe whether consumption of different batches of lingonberries alters the composition of the gut microbiota, which could be relevant for the protective effect against high fat (HF)-induced metabolic alterations. Methods Three groups of C57BL/6J mice were fed HF diet with or without a supplement of 20% lingonberries from two different batches (Lingon1 and Lingon2) during 11 weeks. The composition and functionality of the cecal microbiota were assessed by 16S rRNA sequencing and PICRUSt. In addition, parameters related to obesity, insulin sensitivity, hepatic steatosis, inflammation and gut barrier function were examined. Results HF-induced obesity was only prevented by the Lingon1 diet, whereas both batches of lingonberries reduced plasma levels of markers of inflammation and endotoxemia (SAA and LBP) as well as modified the composition and functionality of the gut microbiota, compared to the HF control group. The relative abundance of Akkermansia and Faecalibacterium, genera associated with healthy gut mucosa and anti-inflammation, was found to increase in response to lingonberry intake. Conclusions Our results show that supplementation with lingonberries to an HF diet prevents low-grade inflammation and is associated with significant changes of the microbiota composition. Notably, the anti-inflammatory properties of lingonberries seem to be independent of effects on body weight gain.
Collapse
Affiliation(s)
| | - Dorota Kotowska
- Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Elin Sand
- ImaGene-IT, Medicon Village, Lund, Sweden
| | | | - Merichel Plaza
- Department of Chemistry, Center for Analysis and Synthesis, Lund University, Lund, Sweden
| | - Charlotta Turner
- Department of Chemistry, Center for Analysis and Synthesis, Lund University, Lund, Sweden
| | - Cecilia Holm
- Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Frida Fåk
- Food for Health Science Centre, Lund University, Medicon Village, Lund, Sweden
| | - Karin Berger
- Department of Experimental Medical Science, Lund University, Lund, Sweden
| |
Collapse
|
44
|
Halmos T, Suba I. [Physiological patterns of intestinal microbiota. The role of dysbacteriosis in obesity, insulin resistance, diabetes and metabolic syndrome]. Orv Hetil 2016; 157:13-22. [PMID: 26708682 DOI: 10.1556/650.2015.30296] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The intestinal microbiota is well-known for a long time, but due to newly recognized functions, clinician's attention has turned to it again in the last decade. About 100 000 billion bacteria are present in the human intestines. The composition of bacteriota living in diverse parts of the intestinal tract is variable according to age, body weight, geological site, and diet as well. Normal bacteriota defend the organism against the penetration of harmful microorganisms, and has many other functions in the gut wall integrity, innate immunity, insulin sensitivity, metabolism, and it is in cross-talk with the brain functions as well. It's a recent recognition, that intestinal microbiota has a direct effect on the brain, and the brain also influences the microbiota. This two-way gut-brain axis consists of microbiota, immune and neuroendocrine system, as well as of the autonomic and central nervous system. Emerging from fermentation of carbohydrates, short-chain fatty acids develop into the intestines, which produce butyrates, acetates and propionates, having favorable effects on different metabolic processes. Composition of the intestinal microbiota is affected by the circadian rhythm, such as in shift workers. Dysruption of circadian rhythm may influence intestinal microbiota. The imbalance between the microbiota and host organism leads to dysbacteriosis. From the membrane of Gram-negative bacteria lipopolysacharides penetrate into the blood stream, via impaired permeability of the intestinal mucosa. These processes induce metabolic endotoxaemia, inflammation, impaired glucose metabolism, insulin resistance, obesity, and contribute to the development of metabolic syndrome, type 2 diabetes, inflammarory bowel diseases, autoimmunity and carcinogenesis. Encouraging therapeutic possibility is to restore the normal microbiota either using pro- or prebiotics, fecal transplantation or bariatric surgery. Human investigations seem to prove that fecal transplant from lean healthy individuals into obese diabetic patients improved all the pathological parameters. Wide spread use of bariatric surgery altered gut microbiota and improved metabolic parameters apart from surgery itself. Pathomechanism is not yet completely clarified. Clinicians hope, that deeper understanding of complex functions of intestinal microbiota will contribute to develop more effective therapeutic proceedings against diabetes, metabolic syndrome, and obesity.
Collapse
Affiliation(s)
- Tamás Halmos
- Metabolikus Ambulancia, Mazsihisz Szeretet Kórház Budapest
| | - Ilona Suba
- Tüdőgondozó, Bajcsy-Zsilinszky Kórház-Rendelőintézet Budapest
| |
Collapse
|
45
|
Cavallari JF, Denou E, Foley KP, Khan WI, Schertzer JD. Different Th17 immunity in gut, liver, and adipose tissues during obesity: the role of diet, genetics, and microbes. Gut Microbes 2016; 7:82-9. [PMID: 26939856 PMCID: PMC4856458 DOI: 10.1080/19490976.2015.1127481] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Microbes modify immunometabolism responses linking obesity and type 2 diabetes. Immunity helps maintain a host-microbe symbiosis, but inflammation can promote insulin resistance in tissues that control blood glucose. We were interested in compartmentalization of immune responses during obesity and show here that feeding mice an obesity-causing high-fat diet (HFD) decreased a marker of neutrophil activation and cytokines related to Th17 responses in the gut. A HFD decreased IL-17 and IL-21/22 in the ileum and colon, respectively. A HFD increased IL-17, IL-21/22 and other related Th17 responses in the liver. At the whole tissue level, there is divergence in gut and metabolic tissue Th17 cytokines during diet-induced obesity. Deletion of the bacterial peptidoglycan sensor NOD2 had relatively minor effects on these immune responses. We propose a model where diet-induced obesity promotes a permissive gut immune environment and sets the stage for host genetics to contribute to dysbiosis-driven metabolic tissue inflammation.
Collapse
Affiliation(s)
- Joseph F. Cavallari
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON, Canada
| | - Emmanuel Denou
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON, Canada
| | - Kevin P. Foley
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON, Canada
| | - Waliul I. Khan
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada,Farncombe Family Digestive Health Research Institute, McMaster University, Hamilton, ON, Canada
| | - Jonathan D. Schertzer
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON, Canada
| |
Collapse
|
46
|
Jiang T, Gao X, Wu C, Tian F, Lei Q, Bi J, Xie B, Wang HY, Chen S, Wang X. Apple-Derived Pectin Modulates Gut Microbiota, Improves Gut Barrier Function, and Attenuates Metabolic Endotoxemia in Rats with Diet-Induced Obesity. Nutrients 2016; 8:126. [PMID: 26938554 DOI: 10.3390/nu8030126] [Citation(s) in RCA: 125] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 02/21/2016] [Accepted: 02/22/2016] [Indexed: 12/24/2022] Open
Abstract
This study was aimed at determining potential effects of apple-derived pectin on weight gain, gut microbiota, gut barrier and metabolic endotoxemia in rat models of diet-induced obesity. The rats received a standard diet (control; Chow group; n = 8) or a high-fat diet (HFD; n = 32) for eight weeks to induce obesity. The top 50th percentile of weight-gainers were selected as diet induced obese rats. Thereafter, the Chow group continued on chow, and the diet induced obese rats were randomly divided into two groups and received HFD (HF group; n = 8) or pectin-supplemented HFD (HF-P group; n = 8) for six weeks. Compared to the HF group, the HF-P group showed attenuated weight gain (207.38 ± 7.96 g vs. 283.63 ± 10.17 g, p < 0.01) and serum total cholesterol level (1.46 ± 0.13 mmol/L vs. 2.06 ± 0.26 mmol/L, p < 0.01). Compared to the Chow group, the HF group showed a decrease in Bacteroidetes phylum and an increase in Firmicutes phylum, as well as subordinate categories (p < 0.01). These changes were restored to the normal levels in the HF-P group. Furthermore, compared to the HF group, the HF-P group displayed improved intestinal alkaline phosphatase (0.57 ± 0.20 vs. 0.30 ± 0.19, p < 0.05) and claudin 1 (0.76 ± 0.14 vs. 0.55 ± 0.18, p < 0.05) expression, and decreased Toll-like receptor 4 expression in ileal tissue (0.76 ± 0.58 vs. 2.04 ± 0.89, p < 0.01). The HF-P group also showed decreased inflammation (TNFα: 316.13 ± 7.62 EU/mL vs. 355.59 ± 8.10 EU/mL, p < 0.01; IL-6: 51.78 ± 2.35 EU/mL vs. 58.98 ± 2.59 EU/mL, p < 0.01) and metabolic endotoxemia (2.83 ± 0.42 EU/mL vs. 0.68 ± 0.14 EU/mL, p < 0.01). These results suggest that apple-derived pectin could modulate gut microbiota, attenuate metabolic endotoxemia and inflammation, and consequently suppress weight gain and fat accumulation in diet induced obese rats.
Collapse
|
47
|
Radilla-Vázquez RB, Parra-Rojas I, Martínez-Hernández NE, Márquez-Sandoval YF, Illades-Aguiar B, Castro-Alarcón N. Gut Microbiota and Metabolic Endotoxemia in Young Obese Mexican Subjects. Obes Facts 2016; 9:1-11. [PMID: 26745497 PMCID: PMC5644836 DOI: 10.1159/000442479] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Accepted: 10/28/2015] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND The gut microbiota plays an important role in human metabolism; previous studies suggest that the imbalance can cause a metabolic endotoxemia that may be linked to weight gain and insulin resistance. The purpose of this study was to investigate the relationship between the gut microbiota composition, the lipopolysaccharide levels and the metabolic profile in obese and normal-weight young subjects. METHODS We studied 32 obese (BMI ≥ 30 kg/m2) and 32 normal-weight subjects (BMI = 18.5-24.9 kg/m2), aged 18-25 years. Quantification of intestinal bacteria was performed by real-time PCR. Endotoxin units were determined with the test QCL-1000, and biochemical profile was performed under a standard protocol of Spinreact. RESULTS Obese individuals had a BMI of 34.5 (32.9-36.45) kg/m2, increased triglycerides (123 vs. 70 mg/dl), total cholesterol (168 vs. 142 mg/dl), and LDL-cholesterol (114 vs. 96.5 mg/dl). In obese subjects body temperature was higher than in normal-weight subjects. We found a greater number of Clostridum leptum and Lactobacillus (p < 0.001) and lower numbers of Prevotella and Escherichia coli (p < 0.001) in the obese group. A decrease of E. coli was associated with an increased risk of lipopolysaccharide levels ranging from 1 to 1.3 EU/ml. A positive correlation was found between serum lipopolysaccharides and BMI (r = 0.46, p = 0.008), triglyceride levels (r = 0.44, p = 0.011) as well as waist circumference (r = 0.34, p = 0.040), being more evident in young obese females. CONCLUSION Subclinical metabolic endotoxemia determined by serum concentration of lipopolysaccharides was related to the smallest amount of E. coli, high triglyceride levels, and central adiposity in obese young persons.
Collapse
Affiliation(s)
| | - Isela Parra-Rojas
- Unidad Académica de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, Chilpancingo, México
| | | | - Yolanda Fabiola Márquez-Sandoval
- Cuerpo Académico 454, Laboratorio de Evaluación del Estado Nutricional, Departamento de Reproducción Humana, Crecimiento y Desarrollo Infantil, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Jalisco, México
| | - Berenice Illades-Aguiar
- Unidad Académica de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, Chilpancingo, México
| | - Natividad Castro-Alarcón
- Unidad Académica de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, Chilpancingo, México
- *Natividad Castro-Alarcón PhD, Laboratorio de Investigación en Microbiología, Unidad Académica de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, 39014 Chilpancingo, México,
| |
Collapse
|
48
|
Abstract
Although several epidemiologic studies reported plausible and potentially causal associations between oral infections and cardiometabolic diseases (CMDs), controversy still lingers. This might be due to unrecognized confounding from metabolic inflammation and genetics, both of which alter the immune responses of the host. Low-grade inflammation termed metainflammation is the hallmark of obesity, insulin resistance, type 2 diabetes, and CMDs. According to the common soil theory, the continuum of obesity to CMDs is the same pathology at different time points, and early metainflammations, such as hyperglycemia and obesity, display many adverse cardiometabolic characteristics. Consequently, adipose tissue is now considered a dynamic endocrine organ that expresses many proinflammatory cytokines such as TNF-α, IL-6, plasminogen activator inhibitor 1, and IL-1β. In metainflammation, IL-1β and reactive oxygen species are generated, and IL-1β is a pivotal molecule in the pathogenesis of CMDs. Note that the same cytokines expressed in metainflammation are also reported in oral infections. In metabolic inflammation and oral infections, the innate immune system is activated through pattern recognition receptors-which include transmembrane receptors such as toll-like receptors (TLRs), cytosolic receptors such as nucleotide-binding oligomerization domain-like receptors, and multiprotein complexes called inflammasome. In general, TLR-2s are presumed to recognize lipoteichoic acid of Gram-positive microbes-and TLR-4s, lipopolysaccharide of Gram-negative microbes-while nucleotide-binding oligomerization domain-like receptors detect both Gram-positive and Gram-negative peptidoglycans on the bacterial cell walls. However, a high-fat diet activates TLR-2s, and obesity activates TLR-4s and induces spontaneous increases in serum lipopolysaccharide levels (metabolic endotoxemia). Moreover, genetics controls lipid-related transcriptome and the differentiation of monocyte and macrophages. Additionally, genetics influences CMDs, and this creates a confounding relationship among oral infections, metainflammation, and genetics. Therefore, future studies must elucidate whether oral infections can increase the risk of CMDs independent of the aforementioned confounding factors.
Collapse
Affiliation(s)
- S-J Janket
- General Dentistry, Boston University H. M. Goldman School of Dental Medicine, Boston, MA, USA Periodontology, Boston University H. M. Goldman School of Dental Medicine, Boston, MA, USA
| | - H Javaheri
- General Dentistry, Boston University H. M. Goldman School of Dental Medicine, Boston, MA, USA
| | - L K Ackerson
- Community Health and Sustainability, University of Massachusetts, Lowell, MA, USA
| | - S Ayilavarapu
- General Dentistry, Boston University H. M. Goldman School of Dental Medicine, Boston, MA, USA
| | - J H Meurman
- Department of Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| |
Collapse
|
49
|
de La Serre CB, de Lartigue G, Raybould HE. Chronic exposure to low dose bacterial lipopolysaccharide inhibits leptin signaling in vagal afferent neurons. Physiol Behav 2014; 139:188-94. [PMID: 25446227 DOI: 10.1016/j.physbeh.2014.10.032] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2014] [Revised: 10/28/2014] [Accepted: 10/30/2014] [Indexed: 01/19/2023]
Abstract
Bacterially derived factors are implicated in the causation and persistence of obesity. Ingestion of a high fat diet in rodents and obesity in human subjects is associated with chronic elevation of low plasma levels of lipopolysaccharide (LPS), a breakdown product of Gram-negative bacteria. The terminals of vagal afferent neurons are positioned within the gut mucosa to convey information from the gut to the brain to regulate food intake and are responsive to LPS. We hypothesized that chronic elevation of LPS could alter vagal afferent signaling. We surgically implanted osmotic mini-pumps that delivered a constant, low-dose of LPS into the intraperitoneal cavity of rats (12.5 μg/kg/hr for 6 weeks). LPS-treated rats developed hyperphagia and showed marked changes in vagal afferent neuron function. Chronic LPS treatment reduced vagal afferent leptin signaling, characterized by a decrease in leptin-induced STAT3 phosphorylation. In addition, LPS treatment decreased cholecystokinin-induced satiety. There was no alteration in leptin signaling in the hypothalamus. These findings offer a mechanism by which a change in gut microflora can promote hyperphagia, possibly leading to obesity.
Collapse
Affiliation(s)
- Claire B de La Serre
- Department of Anatomy, Physiology and Cell Biology, UC Davis School of Veterinary Medicine, Davis, CA 95616, USA
| | - Guillaume de Lartigue
- Department of Anatomy, Physiology and Cell Biology, UC Davis School of Veterinary Medicine, Davis, CA 95616, USA
| | - Helen E Raybould
- Department of Anatomy, Physiology and Cell Biology, UC Davis School of Veterinary Medicine, Davis, CA 95616, USA.
| |
Collapse
|
50
|
Cani PD, Osto M, Geurts L, Everard A. Involvement of gut microbiota in the development of low-grade inflammation and type 2 diabetes associated with obesity. Gut Microbes 2012; 3:279-88. [PMID: 22572877 PMCID: PMC3463487 DOI: 10.4161/gmic.19625] [Citation(s) in RCA: 544] [Impact Index Per Article: 45.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Obesity is associated with metabolic alterations related to glucose homeostasis and cardiovascular risk factors. These metabolic alterations are associated with low-grade inflammation that contributes to the onset of these diseases. We and others have provided evidence that gut microbiota participates in whole-body metabolism by affecting energy balance, glucose metabolism, and low-grade inflammation associated with obesity and related metabolic disorders. Recently, we defined gut microbiota-derived lipopolysaccharide (LPS) (and metabolic endotoxemia) as a factor involved in the onset and progression of inflammation and metabolic diseases. In this review, we discuss mechanisms involved in the development of metabolic endotoxemia such as the gut permeability. We also discuss our latest discoveries demonstrating a link between the gut microbiota, endocannabinoid system tone, leptin resistance, gut peptides (glucagon-like peptide-1 and -2), and metabolic features. Finally, we will introduce the role of the gut microbiota in specific dietary treatments (prebiotics and probiotics) and surgical interventions (gastric bypass).
Collapse
|