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Guan HR, Li B, Zhang ZH, Wu HS, Wang N, Chen XF, Zhou CL, Bian XR, Li L, Xu WF, He XL, Dong YJ, Jiang NH, Su J, Lv GY, Chen SH. Exploring the efficacy and mechanism of Bailing capsule to improve polycystic ovary syndrome in mice based on intestinal-derived LPS-TLR4 pathway. JOURNAL OF ETHNOPHARMACOLOGY 2024; 331:118274. [PMID: 38697410 DOI: 10.1016/j.jep.2024.118274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 04/20/2024] [Accepted: 04/29/2024] [Indexed: 05/05/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Polycystic ovary syndrome (PCOS) is a common endocrine disorder associated with reproductive dysfunction and metabolic abnormalities, particularly characterized by insulin resistance and chronic low-grade inflammation. Multiple clinical studies have clearly demonstrated the significant efficacy and safety of the combination of Bailing capsules (BL) in the treatment of PCOS, but its pharmacological effects and mechanisms still require further study. AIM OF THE STUDY To evaluate the effect of BL on improving PCOS in mice and explore the mechanism. METHODS In this study, Dehydroepiandrosterone (DHEA) injection was administered alone and in combination with a high-fat and high-sugar diet to induce PCOS-like mouse. They were randomly divided into five groups: normal group (N), PCOS group (P), Bailing capsule low-dose group (BL-L), Bailing capsule high-dose group (BL-H) and Metformin + Daine-35 group (M + D). Firstly, the effects of BL on ovarian lesions, serum hormone levels, HOMA-IR, intestinal barrier function, inflammation levels, along with the expression of IRS1, PI3K, AKT, TLR4, Myd88, NF-κB p65, TNF-α, IL-6, and Occludin of the ovary, liver and colon were investigated. Finally, the composition of the gut microbiome of fecal was tested. RESULTS The administration of BL significantly reduced body weight, improved hormone levels, improved IR, and attenuated pathological damage to ovarian tissues, up-regulated the expression of IRS1, PI3K, and AKT in liver. It also decreased serum LPS, TNF-α, and IL-6 levels, while downregulating the expression of Myd88, TLR4, and NF-κB p65. Additionally, BL improved intestinal barrier damage and upregulated the expression of Occludin. Interestingly, the abundance of norank_f__Muribaculacea and Lactobacillus was down-regulated, while the abundance of Akkermansia was significantly up-regulated. CONCLUSION The results of the study showed that BL exerts a treatment PCOS effect, which may be related to the modulation of the gut microbiota, the improvement of insulin resistance and the intestinal-derived LPS-TLR4 inflammatory pathway. Our research will provide a theoretical basis for the clinical treatment of PCOS.
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Affiliation(s)
- Hao-Ru Guan
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, PR China
| | - Bo Li
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, PR China; Zhejiang Provincial Key Laboratory of TCM for Innovative R & D and Digital Intelligent Manufacturing of TCM Great Health Products. Huzhou, Zhejiang Province, 313000, PR China
| | - Ze-Hua Zhang
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, PR China
| | - Han-Song Wu
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, PR China
| | - Ning Wang
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, PR China
| | - Xian-Fang Chen
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, PR China
| | - Cheng-Liang Zhou
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, PR China
| | - Xue-Ren Bian
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, PR China
| | - Lu Li
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, PR China
| | - Wan-Feng Xu
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, PR China
| | - Xing-Lishang He
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, PR China
| | - Ying-Jie Dong
- College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, 310053, PR China
| | - Ning-Hua Jiang
- The Second Affiliated Hospital of Jiaxing University, Jiaxing, 314000, PR China.
| | - Jie Su
- College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, 310053, PR China.
| | - Gui-Yuan Lv
- College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, 310053, PR China.
| | - Su-Hong Chen
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, PR China; Zhejiang Provincial Key Laboratory of TCM for Innovative R & D and Digital Intelligent Manufacturing of TCM Great Health Products. Huzhou, Zhejiang Province, 313000, PR China.
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Harvei S, Skogen V, Egelandsdal B, Birkeland S, Paulsen JE, Carlsen H. Chronic oral LPS administration does not increase inflammation or induce metabolic dysregulation in mice fed a western-style diet. Front Nutr 2024; 11:1376493. [PMID: 39077160 PMCID: PMC11284168 DOI: 10.3389/fnut.2024.1376493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Accepted: 06/25/2024] [Indexed: 07/31/2024] Open
Abstract
Introduction Lipopolysaccharides (LPS) present in the intestine are suggested to enter the bloodstream after consumption of high-fat diets and cause systemic inflammation and metabolic dysregulation through a process named "metabolic endotoxemia." This study aimed to determine the role of orally administered LPS to mice in the early stage of chronic low-grade inflammation induced by diet. Methods We supplemented the drinking water with E. coli derived LPS to mice fed either high-fat Western-style diet (WSD) or standard chow (SC) for 7 weeks (n = 16-17). Body weight was recorded weekly. Systemic inflammatory status was assessed by in vivo imaging of NF-κB activity at different time points, and glucose dysregulation was assessed by insulin sensitivity test and glucose tolerance test near the end of the study. Systemic LPS exposure was estimated indirectly via quantification of LPS-binding protein (LBP) and antibodies against LPS in plasma, and directly using an LPS-sensitive cell reporter assay. Results and discussion Our results demonstrate that weight development and glucose regulation are not affected by LPS. We observed a transient LPS dependent upregulation of NF-κB activity in the liver region in both diet groups, a response that disappeared within the first week of LPS administration and remained low during the rest of the study. However, WSD fed mice had overall a higher NF-κB activity compared to SC fed mice at all time points independent of LPS administration. Our findings indicate that orally administered LPS has limited to no impact on systemic inflammation and metabolic dysregulation in mice fed a high-fat western diet and we question the capability of intestinally derived LPS to initiate systemic inflammation through a healthy and uncompromised intestine, even when exposed to a high-fat diet.
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Affiliation(s)
- Silje Harvei
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, As, Norway
| | - Vemund Skogen
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, As, Norway
| | - Bjørg Egelandsdal
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, As, Norway
| | - Signe Birkeland
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, As, Norway
| | - Jan Erik Paulsen
- Faculty of Veterinary Medicine, Norwegian University of Life Sciences, As, Norway
| | - Harald Carlsen
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, As, Norway
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Massier L, Musat N, Stumvoll M, Tremaroli V, Chakaroun R, Kovacs P. Tissue-resident bacteria in metabolic diseases: emerging evidence and challenges. Nat Metab 2024; 6:1209-1224. [PMID: 38898236 DOI: 10.1038/s42255-024-01065-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 05/13/2024] [Indexed: 06/21/2024]
Abstract
Although the impact of the gut microbiome on health and disease is well established, there is controversy regarding the presence of microorganisms such as bacteria and their products in organs and tissues. However, recent contamination-aware findings of tissue-resident microbial signatures provide accumulating evidence in support of bacterial translocation in cardiometabolic disease. The latter provides a distinct paradigm for the link between microbial colonizers of mucosal surfaces and host metabolism. In this Perspective, we re-evaluate the concept of tissue-resident bacteria including their role in metabolic low-grade tissue and systemic inflammation. We examine the limitations and challenges associated with studying low bacterial biomass samples and propose experimental and analytical strategies to overcome these issues. Our Perspective aims to encourage further investigation of the mechanisms linking tissue-resident bacteria to host metabolism and their potentially actionable health implications for prevention and treatment.
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Affiliation(s)
- Lucas Massier
- Department of Medicine (H7), Karolinska Institutet, Stockholm, Sweden
| | - Niculina Musat
- Aarhus University, Department of Biology, Section for Microbiology, Århus, Denmark
| | - Michael Stumvoll
- Medical Department III - Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, Leipzig, Germany
| | - Valentina Tremaroli
- Wallenberg Laboratory, Department of Molecular and Clinical Medicine, Institute of Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Rima Chakaroun
- Medical Department III - Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, Leipzig, Germany.
- Wallenberg Laboratory, Department of Molecular and Clinical Medicine, Institute of Medicine, University of Gothenburg, Gothenburg, Sweden.
| | - Peter Kovacs
- Medical Department III - Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, Leipzig, Germany.
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Chmielarz M, Sobieszczańska B, Środa-Pomianek K. Metabolic Endotoxemia: From the Gut to Neurodegeneration. Int J Mol Sci 2024; 25:7006. [PMID: 39000116 PMCID: PMC11241432 DOI: 10.3390/ijms25137006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2024] [Revised: 06/22/2024] [Accepted: 06/23/2024] [Indexed: 07/16/2024] Open
Abstract
Metabolic endotoxemia is a severe health problem for residents in developed countries who follow a Western diet, disrupting intestinal microbiota and the whole organism's homeostasis. Although the effect of endotoxin on the human immune system is well known, its long-term impact on the human body, lasting many months or even years, is unknown. This is due to the difficulty of conducting in vitro and in vivo studies on the prolonged effect of endotoxin on the central nervous system. In this article, based on the available literature, we traced the path of endotoxin from the intestines to the blood through the intestinal epithelium and factors promoting the development of metabolic endotoxemia. The presence of endotoxin in the bloodstream and the inflammation it induces may contribute to lowering the blood-brain barrier, potentially allowing its penetration into the central nervous system; although, the theory is still controversial. Microglia, guarding the central nervous system, are the first line of defense and respond to endotoxin with activation, which may contribute to the development of neurodegenerative diseases. We traced the pro-inflammatory role of endotoxin in neurodegenerative diseases and its impact on the epigenetic regulation of microglial phenotypes.
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Affiliation(s)
- Mateusz Chmielarz
- Department of Microbiology, Wroclaw University of Medicine, Chalubinskiego 4 Street, 50-368 Wroclaw, Poland
| | - Beata Sobieszczańska
- Department of Microbiology, Wroclaw University of Medicine, Chalubinskiego 4 Street, 50-368 Wroclaw, Poland
| | - Kamila Środa-Pomianek
- Department of Biophysics and Neuroscience, Wroclaw University of Medicine, Chalubinskiego 3a, 50-368 Wroclaw, Poland
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Kashimura M. Blood defense system - Proposal for a new concept of an immune system against blood borne pathogens comprising the liver, spleen and bone marrow. Scand J Immunol 2024; 99:e13363. [PMID: 38605529 DOI: 10.1111/sji.13363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 02/14/2024] [Accepted: 02/17/2024] [Indexed: 04/13/2024]
Abstract
Blood-borne pathogen (BBP) infections can rapidly progress to life-threatening sepsis and must therefore be promptly eliminated by the host's immune system. Intravascular macrophages of the liver sinusoid, splenic marginal zone and red pulp and perisinusoidal macrophage protrusions in the bone marrow (BM) directly phagocytose BBPs in the blood as an innate immune response. The liver, spleen and BM thereby work together as the blood defence system (BDS) in response to BBPs by exerting their different immunological roles. The liver removes the vast majority of these invading organisms via innate immunity, but their complete elimination is not possible without the actions of antibodies. Splenic marginal zone B cells promptly produce IgM and IgG antibodies against BBPs. The splenic marginal zone transports antigenic information from the innate to the adaptive immune systems. The white pulp of the spleen functions as adaptive immune tissue and produces specific and high-affinity antibodies with an immune memory against BBPs. The BM works to maintain immune memory by supporting the survival of memory B cells, memory T cells and long-lived plasma cells (LLPCs), all of which have dedicated niches. Furthermore, BM perisinusoidal naïve follicular B cells promptly produce IgM antibodies against BBPs in the BM sinusoid and the IgG memory B cells residing in the BM rapidly transform to plasma cells which produce high-affinity IgG antibodies upon reinfection. This review describes the complete immune defence characteristics of the BDS against BBPs through the collaboration of the liver, spleen and BM with combined different immunological roles.
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Affiliation(s)
- Makoto Kashimura
- Department of Hematology, Shinmatsudo Central General Hospital, Matsudo, Japan
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Szentirmai E, Buckley K, Massie AR, Kapas L. Lipopolysaccharide-Mediated Effects of the Microbiota on Sleep and Body Temperature. RESEARCH SQUARE 2024:rs.3.rs-3995260. [PMID: 38496422 PMCID: PMC10942547 DOI: 10.21203/rs.3.rs-3995260/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
Background Recent research suggests that microbial molecules translocated from the intestinal lumen into the host's internal environment may play a role in various physiological functions, including sleep. Previously, we identified that butyrate, a short-chain fatty acid, produced by intestinal bacteria, and lipoteichoic acid, a cell wall component of gram-positive bacteria induce sleep when their naturally occurring translocation is mimicked by direct delivery into the portal vein. Building upon these findings, we aimed to explore the sleep signaling potential of intraportally administered lipopolysaccharide, a primary component of gram-negative bacterial cell walls, in rats. Results Low dose of lipopolysaccharide (1 μg/kg) increased sleep duration and prolonged fever, without affecting systemic lipopolysaccharide levels. Interestingly, administering LPS systemically outside the portal region at a dose 20 times higher did not affect sleep, indicating a localized sensitivity within the hepatoportal region, encompassing the portal vein and liver, for the sleep and febrile effects of lipopolysaccharide. Furthermore, both the sleep- and fever-inducing effects of LPS were inhibited by indomethacin, a prostaglandin synthesis inhibitor, and replicated by intraportal administration of prostaglandin E2 or arachidonic acid, suggesting the involvement of the prostaglandin system in mediating these actions. Conclusions These findings underscore the dynamic influence of lipopolysaccharide in the hepatoportal region on sleep and fever mechanisms, contributing to a complex microbial molecular assembly that orchestrates communication between the intestinal microbiota and brain. Lipopolysaccharide is a physiological component of plasma in both the portal and extra-portal circulation, with its levels rising in response to everyday challenges like high-fat meals, moderate alcohol intake, sleep loss and psychological stress. The increased translocation of lipopolysaccharide under such conditions may account for their physiological impact in daily life, highlighting the intricate interplay between microbial molecules and host physiology.
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Violi F, Pastori D, Pignatelli P, Cammisotto V. Endotoxemia and Platelets: 2 Players of Intrahepatic Microthrombosis in NAFLD. JACC Basic Transl Sci 2024; 9:404-413. [PMID: 38559621 PMCID: PMC10978333 DOI: 10.1016/j.jacbts.2023.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 05/31/2023] [Accepted: 07/05/2023] [Indexed: 04/04/2024]
Abstract
Gut dysbiosis-related intestinal barrier dysfunction with increased translocation of bacterial products such as lipopolysaccharide (LPS) into systemic circulation is emerging as pathogenic factor of nonalcoholic fatty liver disease (NAFLD). Experimental and clinical studies suggested a potential role of LPS as a trigger eliciting in situ liver inflammation upon interaction with its receptor toll-like receptor 4. Also, LPS has been reported to prime platelets to respond to the common agonists indicating that it behaves as a prothrombotic molecule. Of note, recent studies suggested platelet-related intrahepatic thrombosis triggered by LPS as a mechanism implicated in the process of liver inflammation. This review describes: 1) the impact of gut barrier dysfunction and endotoxemia in the process of NAFLD; 2) the relationship between endotoxemia and platelet activation in NAFLD; 3) clinical evidence for the use of antiplatelet drugs in NAFLD/nonalcoholic steatohepatitis patients; and 4) the potential therapeutic approach to modulate endotoxemia and eventually platelet activation.
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Affiliation(s)
| | - Daniele Pastori
- Department of Clinical Internal, Anaesthesiologic and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
| | - Pasquale Pignatelli
- Mediterranea Cardiocentro-Napoli, Naples, Italy
- Department of Clinical Internal, Anaesthesiologic and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
| | - Vittoria Cammisotto
- Department of Clinical Internal, Anaesthesiologic and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
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Li W, Larsen A, Fregulia P. Investigating the impact of feed-induced, subacute ruminal acidosis on rumen epimural transcriptome and metatranscriptome in young calves at 8- and 17-week of age. Front Vet Sci 2024; 11:1328539. [PMID: 38455258 PMCID: PMC10918858 DOI: 10.3389/fvets.2024.1328539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 02/07/2024] [Indexed: 03/09/2024] Open
Abstract
Introduction With the goal to maximize intake of high-fermentable diet needed to meet energy needs during weaning period, calves are at risk for ruminal acidosis. Using the calves from previously established model of feed-induced, ruminal acidosis in young calves, we aimed to investigate the changes in rumen epimural transcriptome and its microbial metatranscriptome at weaning (8-week) and post-weaning (17-week) in canulated (first occurred at 3 weeks of age) Holstein bull calves with feed-induced subacute ruminal acidosis. Methods Eight bull calves were randomly assigned to acidosis-inducing diet (Treated, n = 4; pelleted, 42.7% starch, 15.1% neutral detergent fiber [NDF], and 57.8% nonfiber carbohydrates), while texturized starter was fed as a control (Control, n = 4; 35.3% starch, 25.3% NDF, and 48.1% nonfiber carbohydrates) starting at 1 week through 17 weeks. Calves fed acidosis-inducing diet showed significantly less (p < 0.01) body weight over the course of the experiment, in addition to lower ruminal pH (p < 0.01) compared to the control group. Rumen epithelial (RE) tissues were collected at both 8 weeks (via biopsy) and 17 weeks (via euthanasia) and followed for whole transcriptome RNA sequencing analysis. Differentially expressed genes (DEGs) analysis was done using cufflinks2 (fold-change ≥2 and p < 0.05) between treated and control groups at 8-week of age, and between 8- and 17-week for the treated group. Results At 8-week of age, DEGs between treatment groups showed an enrichment of genes related to the response to lipopolysaccharide (LPS) (p < 0.005). The impact of prolonged, feed-induced acidosis was reflected by the decreased expression (p < 0.005) in genes involved in cell proliferation related pathways in the RE at 17-week of age in the treated group. Unique sets of discriminant microbial taxa were identified between 8-and 17-week calves in the treated group and the treatment groups at 8-week, indicating that active microbial community changes in the RE are an integral part of the ruminal acidosis development and progression.
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Affiliation(s)
- Wenli Li
- US Dairy Forage Research Center, USDA-Agricultural Research Service, Madison, WI, United States
| | - Anna Larsen
- Oak Ridge Institute for Science and Education, Oak Ridge, TN, United States
- Department of Animal and Dairy Sciences, University of Wisconsin-Madison, Madison, WI, United States
| | - Priscila Fregulia
- US Dairy Forage Research Center, USDA-Agricultural Research Service, Madison, WI, United States
- Oak Ridge Institute for Science and Education, Oak Ridge, TN, United States
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Pierdomenico M, Riccioni C, Benassi B. Anti-inflammatory effect of a pomegranate extract on LPS-stimulated HepG2 cells. Nat Prod Res 2024; 38:727-734. [PMID: 37029619 DOI: 10.1080/14786419.2023.2196622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 03/22/2023] [Indexed: 04/09/2023]
Abstract
Pomegranate is an important source of bioactive molecules with proven beneficial effects on human health. The aim of this study was to investigate the potential anti-inflammatory effect of a pomegranate extract (PE), obtained from the whole fruit and previously characterized by Reversed Phase-Ultra High-Pressure Liquid Chromatography-High Resolution Mass Spectrometry (RP-UHPLC-HRMS), on HepG2 human hepatocellular carcinoma cells challenged with the lipopolysaccharide (LPS). In LPS-treated cells (1 µg/ml, 24h), the PE treatment (administered at the non-cytotoxic dose of 1 µg/ml, 24h) induced a significant reduction of three key pro-inflammatory cytokines, i.e. interleukin-8 (IL-8), interleukin-1 beta (IL-1β) and tumor necrosis factor-alpha (TNF-α), at both gene expression (as assayed by real-time PCR) and secretion levels (by Enzyme-linked Immunosorbent Assay, ELISA). Although further in vivo studies are needed to prove its efficacy, this preliminary in vitro study suggests that the PE might be useful for ameliorating liver inflammation.
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Affiliation(s)
- Maria Pierdomenico
- Division of Health Protection Technologies, ENEA-Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Rome, Italy
| | | | - Barbara Benassi
- Division of Health Protection Technologies, ENEA-Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Rome, Italy
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Schirmbeck GH, Seady M, Fróes FT, Taday J, Da Ré C, Souza JM, Gonçalves CA, Leite MC. Long-term LPS systemic administration leads to memory impairment and disturbance in astrocytic homeostasis. Neurotoxicology 2023; 99:322-331. [PMID: 38006911 DOI: 10.1016/j.neuro.2023.11.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 11/13/2023] [Accepted: 11/14/2023] [Indexed: 11/27/2023]
Abstract
Dementia is the most prevalent neurodegenerative disorder, characterized by progressive loss of memory and cognitive function. Inflammation is a major aspect in the progression of brain disorders, and inflammatory events have been associated with accelerated deterioration of cognitive function. In the present work, we investigated the impact of low-grade repeated inflammation stimuli induced by lipopolysaccharide (LPS) in hippocampal function and spatial memory. Adult male Wistar rats received a weekly injection of LPS (500 ug/kg) for sixteen weeks, eliciting systemic inflammation. Animals submitted to LPS presented impaired spatial memory and neuroinflammation. While neuronal synaptic markers such as synaptophysin and PSD-95 were unaltered, critical aspects of astrocyte homeostatic functions, such as glutamate uptake and glutathione content, were reduced. Also, glucose uptake and astrocyte lactate transporters were altered, suggesting a disturbance in the astrocyte-neuron coupling. Our present work demonstrates that long-term repeated systemic inflammation can lead to memory impairment and hippocampal metabolic disorders, especially regarding astrocyte function.
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Affiliation(s)
- Gabriel Henrique Schirmbeck
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Marina Seady
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Fernanda Telles Fróes
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Jéssica Taday
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Carollina Da Ré
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Jéssica Maria Souza
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Carlos Alberto Gonçalves
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Marina Concli Leite
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
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Ali Q, Ma S, Liu B, Mustafa A, Wang Z, Sun H, Cui Y, Li D, Shi Y. Artificial Pasture Grazing System Attenuates Lipopolysaccharide-Induced Gut Barrier Dysfunction, Liver Inflammation, and Metabolic Syndrome by Activating ALP-Dependent Keap1-Nrf2 Pathway. Animals (Basel) 2023; 13:3574. [PMID: 38003191 PMCID: PMC10668702 DOI: 10.3390/ani13223574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 11/09/2023] [Accepted: 11/13/2023] [Indexed: 11/26/2023] Open
Abstract
INTRODUCTION Geese can naturally obtain dietary fiber from pasture, which has anti-inflammatory and antioxidant properties. This study aimed to investigate the inhibitory impacts of pasture on ameliorating LPS-ROS-induced gut barrier dysfunction and liver inflammation in geese. Materials and methods. The lipopolysaccharides (LPS), alkaline phosphatase (ALP), reactive oxygen species (ROS), tight junction proteins, antioxidant enzymes, immunoglobulins, and metabolic syndrome were determined using ELISA kits. The Kelch-like-ECH-associated protein 1-Nuclear factor erythroid 2-related factor 2 (Keap1-Nrf2) and inflammatory cytokines were determined using the quantitative reverse transcription PCR (RT-qPCR) method. The intestinal morphology was examined using the Hematoxylin and Eosin (H&E) staining method in ileal tissues. Results. Pasture significantly influences nutrient absorption (p < 0.001) by ameliorating LPS and ROS-facilitated ileal permeability (p < 0.05) and systemic inflammation (p < 0.01). Herein, the gut permeability was paralleled by liver inflammation, which was significantly mimicked by ALP-dependent Nrf2 (p < 0.0001) and antioxidant enzyme activation (p < 0.05). Indeed, the correlation analysis of host markers signifies the importance of pasture in augmenting geese's health and production by averting gut and liver inflammation. Conclusions. Our results provide new insight into the mechanism of the pasture-induced ALP-dependent Nrf2 signaling pathway in limiting systemic inflammation in geese.
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Affiliation(s)
- Qasim Ali
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (Q.A.); (S.M.); (B.L.); (Z.W.); (H.S.); (Y.C.); (D.L.)
| | - Sen Ma
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (Q.A.); (S.M.); (B.L.); (Z.W.); (H.S.); (Y.C.); (D.L.)
- Henan Key Laboratory of Innovation and Utilization of Grassland Resources, Zhengzhou 450002, China
- Henan Herbage Engineering Technology Research Center, Zhengzhou 450002, China
| | - Boshuai Liu
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (Q.A.); (S.M.); (B.L.); (Z.W.); (H.S.); (Y.C.); (D.L.)
| | - Ahsan Mustafa
- Department of Animal Nutrition, Sichuan Agricultural University, Chengdu 611130, China;
| | - Zhichang Wang
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (Q.A.); (S.M.); (B.L.); (Z.W.); (H.S.); (Y.C.); (D.L.)
- Henan Key Laboratory of Innovation and Utilization of Grassland Resources, Zhengzhou 450002, China
- Henan Herbage Engineering Technology Research Center, Zhengzhou 450002, China
| | - Hao Sun
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (Q.A.); (S.M.); (B.L.); (Z.W.); (H.S.); (Y.C.); (D.L.)
- Henan Key Laboratory of Innovation and Utilization of Grassland Resources, Zhengzhou 450002, China
- Henan Herbage Engineering Technology Research Center, Zhengzhou 450002, China
| | - Yalei Cui
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (Q.A.); (S.M.); (B.L.); (Z.W.); (H.S.); (Y.C.); (D.L.)
- Henan Key Laboratory of Innovation and Utilization of Grassland Resources, Zhengzhou 450002, China
- Henan Herbage Engineering Technology Research Center, Zhengzhou 450002, China
| | - Defeng Li
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (Q.A.); (S.M.); (B.L.); (Z.W.); (H.S.); (Y.C.); (D.L.)
- Henan Key Laboratory of Innovation and Utilization of Grassland Resources, Zhengzhou 450002, China
- Henan Herbage Engineering Technology Research Center, Zhengzhou 450002, China
| | - Yinghua Shi
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (Q.A.); (S.M.); (B.L.); (Z.W.); (H.S.); (Y.C.); (D.L.)
- Henan Key Laboratory of Innovation and Utilization of Grassland Resources, Zhengzhou 450002, China
- Henan Herbage Engineering Technology Research Center, Zhengzhou 450002, China
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12
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Bucci T, Ames PRJ, Cammisotto V, Cardamone C, Ciampa A, Mangoni B, Triggiani M, Carnevale R, Lip GYH, Pastori D, Pignatelli P. Low-grade endotoxemia and risk of recurrent thrombosis in primary antiphospholipid syndrome. The multicenter ATHERO-APS study. Thromb Res 2023; 231:76-83. [PMID: 37827070 DOI: 10.1016/j.thromres.2023.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 10/03/2023] [Accepted: 10/03/2023] [Indexed: 10/14/2023]
Abstract
INTRODUCTION Low-grade endotoxemia is associated with systemic inflammation, enhanced oxidative stress and cardiovascular events in different clinical settings, but its possible role as "second hit" in patients with primary antiphospholipid syndrome (PAPS) has never been investigated. PURPOSE To evaluate the relationship between plasma lipopolysaccharide (LPS) levels, oxidative stress markers and risk of thrombosis in the prospective multicenter ATHERO-APS study. METHODS Baseline LPS, soluble NADPH-oxidase 2-derived peptide (sNOX-dp), H2O2 production, hydrogen peroxide breakdown activity (HBA), and nitric oxide (NO) bioavailability were compared in 97 PAPS, 16 non-thrombotic aPL carriers and 21 controls (CTRL) matched for age and sex. Correlations among laboratory variables were explored by Rho Spearman's correlation (rS). Cox-regression analysis was performed to assess the association between LPS and risk for a composite outcome of cardiovascular death, venous and arterial thromboembolism. RESULTS In the whole cohort (median age 51 years (IQR 43-60), 72 % female), PAPS demonstrated higher levels of LPS, sNOX-dp and H2O2 and lower levels of NO and HBA compared to non-thrombotic aPL carriers and CTRL. LPS levels were inversely correlated with HBA (rS: -0.295, p = 0.001) and NO (rS: -0.322, p < 0.001) and directly correlated with sNOX-dp (rS:0.469, p < 0.001) and H202 (rS:0.282, p < 0.001). PAPS showed higher levels of LPS, sNOX-dp and H2O2 and lower levels of NO and HBA compared to aPL carriers and CTRL. After a 4.7 years follow-up of, 11 composite outcomes were reported in PAPS (2.5 per 100 patient-years) while none was observed in aPL carriers. On Cox-regression analysis, patients with LPS above the median (>23.1 pg/ml) had a 5-fold increased risk of composite outcome compared to those with LPS below the median, after adjustment for sex, age, diabetes, and global antiphospholipid syndrome score. CONCLUSION Low-grade endotoxemia is associated with an increased oxidative stress and a higher risk of thrombosis in PAPS. Its prognostic value in carriers needs to be investigated in larger cohorts.
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Affiliation(s)
- Tommaso Bucci
- Department of General and Specialized Surgery, Sapienza University of Rome, Italy; Liverpool Centre of Cardiovascular Science at University of Liverpool, Liverpool John Moores University and Liverpool Heart & Chest Hospital, Liverpool, United Kingdom.
| | - Paul R J Ames
- Immune Response and Vascular Disease Unit, CEDOC, Nova University Lisbon, Rua Camara Pestana, Lisbon, Portugal; Department of Haematology, Dumfries Royal Infirmary, Cargenbridge, Dumfries, United Kingdom
| | - Vittoria Cammisotto
- Department of Clinical, Internal, Anesthesiological and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
| | - Chiara Cardamone
- Division of Allergy and Clinical Immunology, University of Salerno, Salerno, Italy
| | | | - Bianca Mangoni
- Department of Clinical, Internal, Anesthesiological and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
| | - Massimo Triggiani
- Division of Allergy and Clinical Immunology, University of Salerno, Salerno, Italy
| | - Roberto Carnevale
- Department of Medical-Surgical Sciences and Biotechnologies, Sapienza University of Rome, Rome, Italy; IRCCS Neuromed, Località Camerelle, 86077 Pozzilli, IS, Italy
| | - Gregory Y H Lip
- Liverpool Centre of Cardiovascular Science at University of Liverpool, Liverpool John Moores University and Liverpool Heart & Chest Hospital, Liverpool, United Kingdom; Danish Center for Clinical Health Services Research, Department of Clinical Medicine, Aalborg University, Denmark
| | - Daniele Pastori
- Liverpool Centre of Cardiovascular Science at University of Liverpool, Liverpool John Moores University and Liverpool Heart & Chest Hospital, Liverpool, United Kingdom; Department of Clinical, Internal, Anesthesiological and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy.
| | - Pasquale Pignatelli
- Department of Clinical, Internal, Anesthesiological and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
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13
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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] [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.
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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
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14
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Anthonymuthu S, Sabui S, Lee K, Sheikh A, Fleckenstein JM, Said HM. Bacterial lipopolysaccharide inhibits colonic carrier-mediated uptake of thiamin pyrophosphate: roles for TLR4 receptor and NF-κB/P38/JNK signaling pathway. Am J Physiol Cell Physiol 2023; 325:C758-C769. [PMID: 37519229 PMCID: PMC10635650 DOI: 10.1152/ajpcell.00272.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 07/20/2023] [Accepted: 07/20/2023] [Indexed: 08/01/2023]
Abstract
This study investigated the effect of the bacterial endotoxin lipopolysaccharide (LPS) on colonic uptake of thiamin pyrophosphate (TPP), the biologically active form of vitamin B1 that is generated by gut microbiota. We used three complementary models in our study: in vitro (human-derived colonic epithelial NCM460), ex vivo (human differentiated colonoid monolayers), and in vivo (mouse colonic tissue). The results showed that exposure of NCM460 cells to LPS leads to a significant inhibition of carrier-mediated TPP uptake as well as in decreased expression of the colonic TPP transporter (cTPPT) protein, mRNA, and heterologous nuclear RNA (hnRNA) compared with untreated controls. Similarly, exposure of human differentiated colonoid monolayers and mice to LPS caused significant inhibition in colonic carrier-mediated TPP uptake and in cTPPT protein, mRNA, and hnRNA expression. The effect of LPS on colonic TPP uptake and cTTPT expression was also found to be associated with a significant reduction in activity of the SLC44A4 promoter as well as in decreased expression of the nuclear factor Elf-3 (E74-like ETS transcription factor 3), which is needed for promoter activity. Finally, we found that knocking down the Toll-like receptor 4 (TLR4) and blocking the nuclear factor kappa B (NF-κB), JNK, and p38 signaling pathways with the use of pharmacological inhibitors lead to significant abrogation in the degree of LPS-mediated inhibition in TPP uptake and cTPPT expression. These results demonstrated that exposure of colonic epithelia to LPS inhibits colonic TPP uptake via transcriptional mechanism(s) and that the effect is mediated via TLR4 receptor and NF-κB/p38/JNK signaling pathways.NEW & NOTEWORTHY This study examined the effect of the bacterial lipopolysaccharide (LPS) on the colonic uptake of thiamin pyrophosphate (TPP), the biologically active form of vitamin B1. Three complementary models were used: in vitro (human NCM460 cells), ex vivo (human colonoids), and in vivo (mice). The results showed LPS to significantly suppress TPP uptake and the expression of its transporter, and that these effects are mediated via the membrane TLR4 receptor, and involve the NF-κB/p38/JNK signaling pathways.
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Affiliation(s)
- Selvaraj Anthonymuthu
- Department of Physiology & Biophysics, School of Medicine, University of California, Irvine, California, United States
| | - Subrata Sabui
- Department of Physiology & Biophysics, School of Medicine, University of California, Irvine, California, United States
- Department of Medical Research, Tibor Rubin VA Medical Center, Long Beach, California, United States
| | - Katherine Lee
- Department of Physiology & Biophysics, School of Medicine, University of California, Irvine, California, United States
| | - Alaullah Sheikh
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, United States
| | - James M Fleckenstein
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, United States
- Veterans Affairs Medical Center, St. Louis, Missouri, United States
| | - Hamid M Said
- Department of Physiology & Biophysics, School of Medicine, University of California, Irvine, California, United States
- Department of Medicine, School of Medicine, University of California, Irvine, California, United States
- Department of Medical Research, Tibor Rubin VA Medical Center, Long Beach, California, United States
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15
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Krug SM, Grünhagen C, Allers K, Bojarski C, Seybold J, Schneider T, Schulzke JD, Epple HJ. Macromolecule Translocation across the Intestinal Mucosa of HIV-Infected Patients by Transcytosis and through Apoptotic Leaks. Cells 2023; 12:1887. [PMID: 37508551 PMCID: PMC10378197 DOI: 10.3390/cells12141887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/13/2023] [Accepted: 07/14/2023] [Indexed: 07/30/2023] Open
Abstract
Based on indirect evidence, increased mucosal translocation of gut-derived microbial macromolecules has been proposed as an important pathomechanism in HIV infection. Here, we quantified macromolecule translocation across intestinal mucosa from treatment-naive HIV-infected patients, HIV-infected patients treated by combination antiretroviral therapy, and HIV-negative controls and analyzed the translocation pathways involved. Macromolecule permeability was quantified by FITC-Dextran 4000 (FD4) and horseradish peroxidase (HRP) flux measurements. Translocation pathways were addressed using cold inhibition experiments. Tight junction proteins were characterized by immunoblotting. Epithelial apoptosis was quantified and translocation pathways were further characterized by flux studies in T84 cell monolayers using inducers and inhibitors of apoptosis and endocytosis. In duodenal mucosa of untreated but not treated HIV-infected patients, FD4 and HRP permeabilities were more than a 4-fold increase compared to the HIV-negative controls. Duodenal macromolecule permeability was partially temperature-dependent and associated with epithelial apoptosis without altered expression of the analyzed tight junction proteins. In T84 monolayers, apoptosis induction increased, and both apoptosis and endocytosis inhibitors reduced macromolecule permeability. Using quantitative analysis, we demonstrate the increased macromolecule permeability of the intestinal mucosa in untreated HIV-infected patients. Combining structural and mechanistic studies, we identified two pathways of increased macromolecule translocation in HIV infection: transcytosis and passage through apoptotic leaks.
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Affiliation(s)
- Susanne M Krug
- Clinical Physiology/Nutritional Medicine, Charité-Universitätsmedizin Berlin, 12203 Berlin, Germany
| | - Carolin Grünhagen
- Department of Gastroenterology, Rheumatology and Infectious Diseases, Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, 12203 Berlin, Germany
| | - Kristina Allers
- Department of Gastroenterology, Rheumatology and Infectious Diseases, Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, 12203 Berlin, Germany
| | - Christian Bojarski
- Department of Gastroenterology, Rheumatology and Infectious Diseases, Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, 12203 Berlin, Germany
| | - Joachim Seybold
- Antibiotic Stewardship Team, Medical Directorate, Charité-Universitätsmedizin Berlin, 10117 Berlin, Germany
| | - Thomas Schneider
- Department of Gastroenterology, Rheumatology and Infectious Diseases, Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, 12203 Berlin, Germany
| | - Jörg-Dieter Schulzke
- Clinical Physiology/Nutritional Medicine, Charité-Universitätsmedizin Berlin, 12203 Berlin, Germany
- Department of Gastroenterology, Rheumatology and Infectious Diseases, Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, 12203 Berlin, Germany
| | - Hans-Jörg Epple
- Department of Gastroenterology, Rheumatology and Infectious Diseases, Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, 12203 Berlin, Germany
- Antibiotic Stewardship Team, Medical Directorate, Charité-Universitätsmedizin Berlin, 10117 Berlin, Germany
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16
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Qi P, Lv J, Yan X, Bai L, Zhang L. Microfluidics: Insights into Intestinal Microorganisms. Microorganisms 2023; 11:1134. [PMID: 37317109 DOI: 10.3390/microorganisms11051134] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 04/19/2023] [Accepted: 04/25/2023] [Indexed: 06/16/2023] Open
Abstract
Microfluidics is a system involving the treatment or manipulation of microscale (10-9 to 10-18 L) fluids using microchannels (10 to 100 μm) contained on a microfluidic chip. Among the different methodologies used to study intestinal microorganisms, new methods based on microfluidic technology have been receiving increasing attention in recent years. The intestinal tracts of animals are populated by a vast array of microorganisms that have been established to play diverse functional roles beneficial to host physiology. This review is the first comprehensive coverage of the application of microfluidics technology in intestinal microbial research. In this review, we present a brief history of microfluidics technology and describe its applications in gut microbiome research, with a specific emphasis on the microfluidic technology-based intestine-on-a-chip, and also discuss the advantages and application prospects of microfluidic drug delivery systems in intestinal microbial research.
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Affiliation(s)
- Ping Qi
- The First Clinical Medical College, Lanzhou University, Lanzhou 730000, China
- Department of General Surgery, The First Hospital of Lanzhou University, Lanzhou 730000, China
- Key Laboratory of Biotherapy and Regenerative Medicine of Gansu Province, The First Hospital of Lanzhou University, Lanzhou 730000, China
| | - Jin Lv
- The First Clinical Medical College, Lanzhou University, Lanzhou 730000, China
- Department of General Surgery, The First Hospital of Lanzhou University, Lanzhou 730000, China
- Key Laboratory of Biotherapy and Regenerative Medicine of Gansu Province, The First Hospital of Lanzhou University, Lanzhou 730000, China
| | - Xiangdong Yan
- The First Clinical Medical College, Lanzhou University, Lanzhou 730000, China
- Department of General Surgery, The First Hospital of Lanzhou University, Lanzhou 730000, China
- Key Laboratory of Biotherapy and Regenerative Medicine of Gansu Province, The First Hospital of Lanzhou University, Lanzhou 730000, China
| | - Liuhui Bai
- The First Clinical Medical College, Lanzhou University, Lanzhou 730000, China
- Department of General Surgery, The First Hospital of Lanzhou University, Lanzhou 730000, China
- Key Laboratory of Biotherapy and Regenerative Medicine of Gansu Province, The First Hospital of Lanzhou University, Lanzhou 730000, China
| | - Lei Zhang
- The First Clinical Medical College, Lanzhou University, Lanzhou 730000, China
- Department of General Surgery, The First Hospital of Lanzhou University, Lanzhou 730000, China
- Key Laboratory of Biotherapy and Regenerative Medicine of Gansu Province, The First Hospital of Lanzhou University, Lanzhou 730000, China
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17
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Cinicola BL, Palumbo IM, Pannunzio A, Carnevale R, Bartimoccia S, Cammisotto V, Capponi M, Brindisi G, Salvatori F, Barillà F, Martino F, D'Amico A, Poscia R, Spalice A, Zicari AM, Violi F, Loffredo L. Low Grade Endotoxemia and Oxidative Stress in Offspring of Patients with Early Myocardial Infarction. Antioxidants (Basel) 2023; 12:antiox12040958. [PMID: 37107333 PMCID: PMC10135978 DOI: 10.3390/antiox12040958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 04/14/2023] [Accepted: 04/18/2023] [Indexed: 04/29/2023] Open
Abstract
Background and aims: Offspring of patients with early myocardial infarction are at higher cardiovascular risk, but the underlying physio-pathological mechanism is unclear. NADPH oxidase-type 2 (NOX-2) plays a pivotal role as mediator of oxidative stress and could be involved in activating platelets in these patients. Furthermore, altered intestinal permeability and serum lipopolysaccharide (LPS) could be a trigger to promote NOX-2 activation and platelet aggregation. This study aims to evaluate the behavior of low grade endotoxemia, oxidative stress and platelet activation in offspring of patients with early myocardial infarction. Methods: We enrolled, in a cross-sectional study, 46 offspring of patients with early myocardial infarction and 86 healthy subjects (HS). LPS levels and gut permeability (assessed by zonulin), oxidative stress (assessed by serum NOX-2-derived peptide (sNOX2-dp) release, hydrogen peroxide (H2O2) production and isoprostanes), serum nitric oxide (NO) bioavailability and platelet activation (by serum thromboxane B2 (TXB2) and soluble P-Selectin (sP-Selectin)) were analyzed. Results: Compared to HS, offspring of patients with early myocardial infarction had higher values of LPS, zonulin, serum isoprostanes, sNOX2-dp H2O2, TXB2, p-selectin and lower NO bioavailability. Logistic regression analysis showed that the variables associated with offspring of patients with early myocardial infarction were LPS, TXB2 and isoprostanes. The multiple linear regression analysis confirmed that serum NOX-2, isoprostanes, p-selectin and H2O2 levels were significantly associated to LPS. Furthermore, serum LPS, isoprostanes and TXB2 levels were significantly associated with sNOX-2-dp. Conclusions: Offspring of patients with early myocardial infarction have a low grade endotoxemia that could generate oxidative stress and platelet activation increasing their cardiovascular risk. Future studies are needed to understand the role of dysbiosis in this population.
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Affiliation(s)
- Bianca Laura Cinicola
- Department of Maternal Infantile and Urological Sciences, Division of Pediatric Allergology and Immunology, Sapienza University of Rome, Viale Regina Elena 324, 00161 Rome, Italy
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 391, 00161 Rome, Italy
| | - Ilaria Maria Palumbo
- Department of Clinical, Internistic, Anaesthetic and Cardiovascular Sciences, Sapienza University of Rome, Viale del Policlinico 155, 00161 Rome, Italy
| | - Arianna Pannunzio
- Department of Clinical, Internistic, Anaesthetic and Cardiovascular Sciences, Sapienza University of Rome, Viale del Policlinico 155, 00161 Rome, Italy
| | - Roberto Carnevale
- Department of Medical-Surgical Sciences and Biotechnologies, Sapienza University of Rome, Corso della Repubblica, 79, 04100 Latina, Italy
- IRCCS Neuromed, Località Camerele, 86077 Pozzilli, Italy
| | - Simona Bartimoccia
- Department of Clinical, Internistic, Anaesthetic and Cardiovascular Sciences, Sapienza University of Rome, Viale del Policlinico 155, 00161 Rome, Italy
| | - Vittoria Cammisotto
- Department of Clinical, Internistic, Anaesthetic and Cardiovascular Sciences, Sapienza University of Rome, Viale del Policlinico 155, 00161 Rome, Italy
| | - Martina Capponi
- Department of Maternal Infantile and Urological Sciences, Division of Pediatric Allergology and Immunology, Sapienza University of Rome, Viale Regina Elena 324, 00161 Rome, Italy
| | - Giulia Brindisi
- Department of Maternal Infantile and Urological Sciences, Division of Pediatric Allergology and Immunology, Sapienza University of Rome, Viale Regina Elena 324, 00161 Rome, Italy
| | - Francesca Salvatori
- Department of Maternal Infantile and Urological Sciences, Division of Pediatric Allergology and Immunology, Sapienza University of Rome, Viale Regina Elena 324, 00161 Rome, Italy
| | - Francesco Barillà
- Unit of Cardiology, University Hospital "Tor Vergata", 00133 Rome, Italy
| | - Francesco Martino
- Department of Pediatrics and Pediatric Neuropsychiatry, Sapienza University of Rome, Piazzale Aldo Moro, 5, 00185 Rome, Italy
| | - Alessandra D'Amico
- Department of Movement, Human and Health Sciences, University of Rome "Foro Italico", Piazza Lauro De Bosis, 15, 00135 Rome, Italy
| | - Roberto Poscia
- Unita di Ricerca Clinica e Clinical Competence-Direzione Generale, AOU Policlinico Umberto I, 00161 Rome, Italy
| | - Alberto Spalice
- Department of Maternal Infantile and Urological Sciences, Division of Pediatric Allergology and Immunology, Sapienza University of Rome, Viale Regina Elena 324, 00161 Rome, Italy
| | - Anna Maria Zicari
- Department of Maternal Infantile and Urological Sciences, Division of Pediatric Allergology and Immunology, Sapienza University of Rome, Viale Regina Elena 324, 00161 Rome, Italy
| | - Francesco Violi
- Department of Pediatrics and Pediatric Neuropsychiatry, Sapienza University of Rome, Piazzale Aldo Moro, 5, 00185 Rome, Italy
- Mediterranea Cardiocentro-Napoli, 80122 Naples, Italy
| | - Lorenzo Loffredo
- Department of Clinical, Internistic, Anaesthetic and Cardiovascular Sciences, Sapienza University of Rome, Viale del Policlinico 155, 00161 Rome, Italy
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18
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Haroun E, Kumar PA, Saba L, Kassab J, Ghimire K, Dutta D, Lim SH. Intestinal barrier functions in hematologic and oncologic diseases. J Transl Med 2023; 21:233. [PMID: 37004099 PMCID: PMC10064590 DOI: 10.1186/s12967-023-04091-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 03/26/2023] [Indexed: 04/03/2023] Open
Abstract
The intestinal barrier is a complex structure that not only regulates the influx of luminal contents into the systemic circulation but is also involved in immune, microbial, and metabolic homeostasis. Evidence implicating disruption in intestinal barrier functions in the development of many systemic diseases, ranging from non-alcoholic steatohepatitis to autism, or systemic complications of intestinal disorders has increased rapidly in recent years, raising the possibility of the intestinal barrier as a potential target for therapeutic intervention to alter the course and mitigate the complications associated with these diseases. In addition to the disease process being associated with a breach in the intestinal barrier functions, patients with hematologic and oncologic diseases are particularly at high risks for the development of increased intestinal permeability, due to the frequent use of broad-spectrum antibiotics and chemoradiation. They also face a distinct challenge of being intermittently severely neutropenic due to treatment of the underlying conditions. In this review, we will discuss how hematologic and oncologic diseases are associated with disruption in the intestinal barrier and highlight the complications associated with an increase in the intestinal permeability. We will explore methods to modulate the complication. To provide a background for our discussion, we will first examine the structure and appraise the methods of evaluation of the intestinal barrier.
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Affiliation(s)
- Elio Haroun
- Division of Hematology and Oncology, State University of New York Upstate Medical University, SUNY Upstate Medical University, 750 E Adams, Syracuse, NY, 13210, USA
| | - Prashanth Ashok Kumar
- Division of Hematology and Oncology, State University of New York Upstate Medical University, SUNY Upstate Medical University, 750 E Adams, Syracuse, NY, 13210, USA
| | - Ludovic Saba
- Department of Medicine, Saint-Joseph University of Beirut, Beirut, Lebanon
| | - Joseph Kassab
- Department of Medicine, Saint-Joseph University of Beirut, Beirut, Lebanon
| | - Krishna Ghimire
- Division of Hematology and Oncology, State University of New York Upstate Medical University, SUNY Upstate Medical University, 750 E Adams, Syracuse, NY, 13210, USA
| | - Dibyendu Dutta
- Division of Hematology and Oncology, State University of New York Upstate Medical University, SUNY Upstate Medical University, 750 E Adams, Syracuse, NY, 13210, USA.
| | - Seah H Lim
- Division of Hematology and Oncology, State University of New York Upstate Medical University, SUNY Upstate Medical University, 750 E Adams, Syracuse, NY, 13210, USA.
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19
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Abenavoli L, Scarlata GGM, Scarpellini E, Boccuto L, Spagnuolo R, Tilocca B, Roncada P, Luzza F. Metabolic-Dysfunction-Associated Fatty Liver Disease and Gut Microbiota: From Fatty Liver to Dysmetabolic Syndrome. Medicina (B Aires) 2023; 59:medicina59030594. [PMID: 36984595 PMCID: PMC10054528 DOI: 10.3390/medicina59030594] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/10/2023] [Accepted: 03/15/2023] [Indexed: 03/19/2023] Open
Abstract
Metabolic-dysfunction-associated fatty liver disease (MAFLD) is the recent nomenclature designation that associates the condition of non-alcoholic fatty liver disease (NAFLD) with metabolic dysfunction. Its diagnosis has been debated in the recent period and is generally associated with a diagnosis of steatosis and at least one pathologic condition among overweight/obesity, type 2 diabetes mellitus, and metabolic dysregulation. Its pathogenesis is defined by a “multiple-hit” model and is associated with alteration or dysbiosis of the gut microbiota. The pathogenic role of dysbiosis of the gut microbiota has been investigated in many diseases, including obesity, type 2 diabetes mellitus, and NAFLD. However, only a few works correlate it with MAFLD, although common pathogenetic links to these diseases are suspected. This review underlines the most recurrent changes in the gut microbiota of patients with MAFLD, while also evidencing possible pathogenetic links.
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Affiliation(s)
- Ludovico Abenavoli
- Department of Health Sciences, University “Magna Graecia”, 88100 Catanzaro, Italy
- Correspondence: ; Tel.: +39-0961-369-4387
| | | | - Emidio Scarpellini
- Translationeel Onderzoek van Gastro-enterologische Aandoeningen (T.A.R.G.I.D.), Gasthuisberg University Hospital, KU Leuven, Herestraat 49, 3000 Leuven, Belgium
| | - Luigi Boccuto
- School of Nursing, Healthcare Genetics Program, Clemson University, Clemson, SC 29634, USA
- School of Health Research, Clemson University, Clemson, SC 29634, USA
| | - Rocco Spagnuolo
- Department of Health Sciences, University “Magna Graecia”, 88100 Catanzaro, Italy
| | - Bruno Tilocca
- Department of Health Sciences, University “Magna Graecia”, 88100 Catanzaro, Italy
| | - Paola Roncada
- Department of Health Sciences, University “Magna Graecia”, 88100 Catanzaro, Italy
| | - Francesco Luzza
- Department of Health Sciences, University “Magna Graecia”, 88100 Catanzaro, Italy
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20
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Breaking the Gingival Barrier in Periodontitis. Int J Mol Sci 2023; 24:ijms24054544. [PMID: 36901974 PMCID: PMC10003416 DOI: 10.3390/ijms24054544] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 02/20/2023] [Accepted: 02/22/2023] [Indexed: 03/02/2023] Open
Abstract
The break of the epithelial barrier of gingiva has been a subject of minor interest, albeit playing a key role in periodontal pathology, transitory bacteraemia, and subsequent systemic low-grade inflammation (LGI). The significance of mechanically induced bacterial translocation in gingiva (e.g., via mastication and teeth brushing) has been disregarded despite the accumulated knowledge of mechanical force effects on tight junctions (TJs) and subsequent pathology in other epithelial tissues. Transitory bacteraemia is observed as a rule in gingival inflammation, but is rarely observed in clinically healthy gingiva. This implies that TJs of inflamed gingiva deteriorate, e.g., via a surplus of lipopolysaccharide (LPS), bacterial proteases, toxins, Oncostatin M (OSM), and neutrophil proteases. The inflammation-deteriorated gingival TJs rupture when exposed to physiological mechanical forces. This rupture is characterised by bacteraemia during and briefly after mastication and teeth brushing, i.e., it appears to be a dynamic process of short duration, endowed with quick repair mechanisms. In this review, we consider the bacterial, immune, and mechanical factors responsible for the increased permeability and break of the epithelial barrier of inflamed gingiva and the subsequent translocation of both viable bacteria and bacterial LPS during physiological mechanical forces, such as mastication and teeth brushing.
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21
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McDaniel ZS, Hales KE, Nagaraja TG, Lawrence TE, Amachawadi RG, Carroll JA, Burdick Sanchez NC, Galyean ML, Smock TM, Ballou MA, Machado VS, Broadway PR. Short communication: evaluation of an endotoxin challenge and intraruminal bacterial inoculation model to induce liver abscesses in Holstein steers. J Anim Sci 2023; 101:skad242. [PMID: 37480360 PMCID: PMC10404062 DOI: 10.1093/jas/skad242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 07/21/2023] [Indexed: 07/24/2023] Open
Abstract
Holstein steers (n = 40; initial body weight [BW] = 96.0 ± 10.5 kg) were individually housed in a climate-controlled barn to evaluate potential models for the genesis of liver abscesses (LA). In this 2 × 2 factorial, steers were balanced by BW and randomly assigned to one of two treatments: 1) intravenous saline injection followed by intraruminal bacterial inoculation with Fusobacterium necrophorum subsp. necrophorum (1 × 109 colony forming unit [CFU]/mL) and Salmonella enterica serovar Lubbock (1 × 106 CFU/mL; CON; n = 20 steers); or 2) intravenous injection with 0.25 µg/kg BW of lipopolysaccharide (LPS; Escherichia coli O111:B4) followed by intraruminal bacterial inoculation of F. necrophorum subsp. necrophorum (1 × 109 CFU/mL) and S. enterica serovar Lubbock (1 × 106 CFU/mL; LBI; n = 20 steers) and 1 of 2 harvest dates (3 or 10 d post LPS infusion). Body weights were recorded on days -4, -1, 3, and 10, and blood was collected for hematology on days -4, 3, and 10, relative to LPS infusion on day 0. Intraruminal bacterial inoculation occurred on day 1. Steers from each treatment group were harvested at two different time points on day 3 or 10 to perform gross pathological examination of the lung, rumen, liver, LA (if present), and colon. Feed disappearance was less for LBI than CON (P < 0.01); however, BW did not differ (P = 0.33) between treatments. Neither treatment nor time differed for hematology (P ≥ 0.13), and no gross pathological differences were noted in the lung, liver, LA, or colon (P ≥ 0.25). A treatment × harvest date interaction was noted for ruminal pathology in which LBI had an increased percentage of abnormal rumen scores on day 3 (P < 0.01). These results suggest that an LPS challenge in combination with intraruminal bacterial inoculation of pathogens commonly isolated from LA was not sufficient to induce LA in steers within 3 or 10 d (P = 0.95) when compared to CON. Further evaluation is needed to produce a viable model to investigate the genesis and prevention of LA in cattle.
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Affiliation(s)
- Zach S McDaniel
- Department of Animal and Food Sciences, Texas Tech University, Lubbock, TX 79409, USA
| | - Kristin E Hales
- Department of Animal and Food Sciences, Texas Tech University, Lubbock, TX 79409, USA
| | - T G Nagaraja
- Department of Diagnostic Medicine/Pathology, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506, USA
| | - Ty E Lawrence
- Department of Agricultural Sciences, West Texas A&M University, Canyon, TX 79016, USA
| | - Raghavendra G Amachawadi
- Department of Diagnostic Medicine/Pathology, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506, USA
| | - Jeff A Carroll
- Department of Agricultural Sciences, United States Department of Agriculture, Agricultural Research Service, Livestock Issues Research Unit, Lubbock, TX 79401, USA
| | - Nicole C Burdick Sanchez
- Department of Agricultural Sciences, United States Department of Agriculture, Agricultural Research Service, Livestock Issues Research Unit, Lubbock, TX 79401, USA
| | - Michael L Galyean
- Department of Veterinary Sciences, Texas Tech University, Lubbock, TX 79409, USA
| | - Taylor M Smock
- Department of Animal and Food Sciences, Texas Tech University, Lubbock, TX 79409, USA
| | - Michael A Ballou
- Department of Veterinary Sciences, Texas Tech University, Lubbock, TX 79409, USA
| | - Vinicius S Machado
- Department of Veterinary Sciences, Texas Tech University, Lubbock, TX 79409, USA
| | - Paul R Broadway
- Department of Agricultural Sciences, United States Department of Agriculture, Agricultural Research Service, Livestock Issues Research Unit, Lubbock, TX 79401, USA
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22
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The Microbial Ecology of Liver Abscesses in Cattle. Vet Clin North Am Food Anim Pract 2022; 38:367-381. [DOI: 10.1016/j.cvfa.2022.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
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23
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Wang H, Reddy ST, Fogelman AM. The role of gut-derived oxidized lipids and bacterial lipopolysaccharide in systemic inflammation and atherosclerosis. Curr Opin Lipidol 2022; 33:277-282. [PMID: 35979993 PMCID: PMC9581106 DOI: 10.1097/mol.0000000000000841] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW This review explores mechanisms by which gut-derived bacteriallipopolysaccharide (LPS) and oxidized phospholipids contribute to chronic systemic inflammation and atherosclerosis. RECENT FINDINGS Gut-derived LPS enters through the small intestine via two distinct pathways that involve high density lipoproteins (HDL) and chylomicrons. Gut-derived LPS can bind to the LPS-binding protein (LBP) and to HDL 3 in the small intestine and travel through the portal vein to the liver where it does not elicit an inflammatory reaction, and is inactivated or it can bind to HDL 2 and travel through the portal vein to the liver where it elicits an inflammatory reaction. Alternatively, in the small intestine, LPS can bind to LBP and chylomicrons and travel through the lymphatics to the systemic circulation and enhance inflammatory processes including atherosclerosis. Oxidized phospholipids formed in the small intestine regulate the levels and uptake of LPS in small intestine by regulating antimicrobial proteins such as intestinal alkaline phosphatase. Gut-derived LPS and oxidized phospholipids may be responsible for the persistent inflammation seen in some persons with human immunodeficiency virus on potent antiretroviral therapy with undetectable virus levels. SUMMARY By targeting gut-derived oxidized phospholipids, the uptake of gut-derived LPS may be reduced to decrease systemic inflammation and atherosclerosis.
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Affiliation(s)
- Huan Wang
- Department of Medicine, Division of Cardiology
| | - Srinivasa T. Reddy
- Department of Medicine, Division of Cardiology
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine at UCLA, Los Angeles California, USA
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24
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Huschtscha Z, Young P, Parr A, Porter J, Costa R. Does intestinal epithelial integrity status in response to high-protein dairy milk beverage with or without progressive resistance training impact systemic inflammatory responses in an active aging population? PLoS One 2022; 17:e0274210. [PMID: 36054131 PMCID: PMC9439207 DOI: 10.1371/journal.pone.0274210] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 08/22/2022] [Indexed: 11/18/2022] Open
Abstract
Increased resting systemic anti-inflammatory responses have previously been reported after a period of progressive resistance training (PRT) with daily consumption of a high-protein dairy beverage. The study aimed to investigate the independent and combined effects of consuming a high protein dairy milk beverage with or without a PRT on markers of intestinal epithelial integrity and selected systemic inflammatory responses in active older (≥50 yrs) adults. Thirty two (males n = 24, females n = 8) active older adults [mean (SD): Age 62 (7) years, weight 74.2 (14.0) kg, height 1.73 (10.0) cm, BMI 24.9 (4.0) kg/m2, and body fat mass: 25.8 (9.1)%)], that reported exercising ≥3/week (211 (91) min/week) were randomly allocated into one of four groups: dairy milk (DM), exercise and dairy milk (EX+DM), exercise alone (EX), and control (CON). Groups with EX underwent 12-weeks whole-body PRT program (x3 sessions/week), groups with DM consumed the beverage twice daily (30g protein/day), and CON was required to carry out their ad libitum dietary and exercise habits. Plasma concentrations of CRP, IL-1ß, IL-1ra, LBP, and sCD14 were determined by ELISA from samples collected at weeks 0, 6, and 12. Data were analyzed (SPSS v25.0) for group and time differences using a two-way repeated-measures ANOVA with post hoc analysis. No significant differences were observed for any of the measured plasma biomarkers. The previously observed increase in anti-inflammatory cytokine response is likely due to a muscular cellular response and not an indication of intestinal epithelial integrity disturbance and/or subsequent translocation of luminal originated pathogenic bacterial compounds.
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Affiliation(s)
- Zoya Huschtscha
- Department of Nutrition Dietetics & Food, Monash University, Notting Hill, Victoria, Australia
| | - Pascale Young
- Department of Nutrition Dietetics & Food, Monash University, Notting Hill, Victoria, Australia
| | - Alexandra Parr
- Department of Nutrition Dietetics & Food, Monash University, Notting Hill, Victoria, Australia
| | - Judi Porter
- Department of Nutrition Dietetics & Food, Monash University, Notting Hill, Victoria, Australia
- School of Exercise and Nutrition Sciences, Deakin University, Melbourne Burwood Campus, Burwood, Victoria, Australia
| | - Ricardo Costa
- Department of Nutrition Dietetics & Food, Monash University, Notting Hill, Victoria, Australia
- * E-mail:
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25
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Liu SY, Rao JX, Deng J, Zhang GJ, Jiang XL, Cheng J, Chen H, Jiang ZG, Xu DL, He YH. Feedback loop between hepatocyte nuclear factor 1α and endoplasmic reticulum stress mitigates liver injury by downregulating hepatocyte apoptosis. Sci Rep 2022; 12:11602. [PMID: 35804081 PMCID: PMC9270423 DOI: 10.1038/s41598-022-15846-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Accepted: 06/30/2022] [Indexed: 01/18/2023] Open
Abstract
Hepatocyte nuclear factor alpha (HNF1α), endoplasmic reticulum (ER) stress, and hepatocyte apoptosis contribute to severe acute exacerbation (SAE) of liver injury. Here, we explore HNF1α–ER stress-hepatocyte apoptosis interaction in liver injury. LO2, HepG2 and SK-Hep1 cells were treated with thapsigargin (TG) or tunicamycin (TM) to induce ER stress. Carbon tetrachloride (CCl4) was used to induce acute liver injury in mice. Low-dose lipopolysaccharide (LPS) exacerbated liver injury in CCl4-induced mice. Significant apoptosis, HNF1α upregulation, and nuclear factor kappa B (NF-κB) activation were observed in human-derived hepatocytes during ER stress. Knockdown of Rela, NF-κB p65, inhibited the HNF1α upregulation. Following CCl4 treatment ER stress, apoptosis, HNF1α expression and RelA phosphorylation were significantly increased in mice. HNF1α knockdown reduced activating transcription factor 4 (ATF4) expression, and aggravated ER stress as well as hepatocyte apoptosis in vivo and in vitro. The double fluorescent reporter gene assay confirmed that HNF1α regulated the transcription of ATF4 promoter. LPS aggravated CCl4-induced liver injury and reduced HNF1α, and ATF4 expression. Therefore, in combination, HNF1α and ER stress could be mutually regulated forming a feedback loop, which helps in protecting the injured liver by down-regulating hepatocyte apoptosis. Low-dose LPS aggravates hepatocyte apoptosis and promotes the SAE of liver injury by interfering with the feedback regulation of HNF1α and ER stress in acute liver injury.
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Affiliation(s)
- Si-Ying Liu
- Department of Infectious Diseases, The Affiliated Hospital of Zunyi Medical University, No. 201 Dalian Street, Zunyi, 563000, Guizhou, China
| | - Jian-Xu Rao
- Department of Infectious Diseases, The Affiliated Hospital of Zunyi Medical University, No. 201 Dalian Street, Zunyi, 563000, Guizhou, China
| | - Jie Deng
- Department of Infectious Diseases, The Affiliated Hospital of Zunyi Medical University, No. 201 Dalian Street, Zunyi, 563000, Guizhou, China
| | - Gui-Juan Zhang
- Department of Infectious Diseases, The Affiliated Hospital of Zunyi Medical University, No. 201 Dalian Street, Zunyi, 563000, Guizhou, China
| | - Xiao-Ling Jiang
- Department of Infectious Diseases, The Affiliated Hospital of Zunyi Medical University, No. 201 Dalian Street, Zunyi, 563000, Guizhou, China
| | - Jing Cheng
- Department of Infectious Diseases, The Affiliated Hospital of Zunyi Medical University, No. 201 Dalian Street, Zunyi, 563000, Guizhou, China
| | - Huan Chen
- Department of Infectious Diseases, The Affiliated Hospital of Zunyi Medical University, No. 201 Dalian Street, Zunyi, 563000, Guizhou, China
| | - Zhi-Gang Jiang
- School of Public Health, Zunyi Medical University, Zunyi, 563099, Guizhou, China
| | - De-Lin Xu
- Cell Biology Department, Zunyi Medical University, Zunyi, 563099, Guizhou, China
| | - Yi-Huai He
- Department of Infectious Diseases, The Affiliated Hospital of Zunyi Medical University, No. 201 Dalian Street, Zunyi, 563000, Guizhou, China.
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26
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Liu X, Vigorito M, Huang W, Khan MAS, Chang SL. The Impact of Alcohol-Induced Dysbiosis on Diseases and Disorders of the Central Nervous System. J Neuroimmune Pharmacol 2022; 17:131-151. [PMID: 34843074 DOI: 10.1007/s11481-021-10033-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 11/11/2021] [Indexed: 12/29/2022]
Abstract
The human digestive tract contains a diverse and abundant microbiota that is important for health. Excessive alcohol use can disrupt the balance of these microbes (known as dysbiosis), leading to elevated blood endotoxin levels and systemic inflammation. Using QIAGEN Ingenuity Pathway Analysis (IPA) bioinformatics tool, we have confirmed that peripheral endotoxin (lipopolysaccharide) mediates various cytokines to enhance the neuroinflammation signaling pathway. The literature has identified alcohol-mediated neuroinflammation as a possible risk factor for the onset and progression of neurodegenerative diseases, including Alzheimer's disease (AD) and Parkinson's disease (PD), and psychiatric disorders such as addiction to alcohol and other drugs. In this review, we discuss alcohol-use-induced dysbiosis in the gut and other body parts as a causal factor in the progression of Central Nervous System (CNS) diseases including neurodegenerative disease and possibly alcohol use disorder.
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Affiliation(s)
- Xiangqian Liu
- Institute of Neuroimmune Pharmacology, Seton Hall University, South Orange, NJ, 07079, USA
- Department of Histology and Embryology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, P.R. China
| | - Michael Vigorito
- Institute of Neuroimmune Pharmacology, Seton Hall University, South Orange, NJ, 07079, USA
- Department of Psychology, Seton Hall University, South Orange, NJ, 07079, USA
| | - Wenfei Huang
- Institute of Neuroimmune Pharmacology, Seton Hall University, South Orange, NJ, 07079, USA
- Department of Biological Sciences, Seton Hall University, South Orange, NJ, 07079, USA
| | - Mohammed A S Khan
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School and Shriners Hospital for Children, Boston, MA, 02114, USA.
| | - Sulie L Chang
- Institute of Neuroimmune Pharmacology, Seton Hall University, South Orange, NJ, 07079, USA.
- Department of Biological Sciences, Seton Hall University, South Orange, NJ, 07079, USA.
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27
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Interaction of Gut Microbiota with Endocrine Homeostasis and Thyroid Cancer. Cancers (Basel) 2022; 14:cancers14112656. [PMID: 35681636 PMCID: PMC9179244 DOI: 10.3390/cancers14112656] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 05/22/2022] [Accepted: 05/24/2022] [Indexed: 01/27/2023] Open
Abstract
The gut microbiota plays a crucial role in healthy individuals as well as in patients with thyroid diseases, including thyroid cancer. Although the prognosis of differentiated thyroid cancer is predictable, that of some poorly differentiated, medullary, and anaplastic thyroid cancers remains unpromising. As the interaction between the gut microbiota and thyroid cancer has been gradually revealed in recent years, the thyroid gland, a crucial endocrine organ, is shown to have a complex connection with the body's metabolism and is involved in inflammation, autoimmunity, or cancer progression. Dysbiosis of the gut microbiota and its metabolites can influence changes in hormone levels and susceptibility to thyroid cancer through multiple pathways. In this review, we focus on the interactions of the gut microbiota with thyroid function diseases and thyroid cancer. In addition, we also discuss some potential new strategies for the prevention and treatment of thyroid disease and thyroid cancer. Our aim is to provide some possible clinical applications of gut microbiota markers for early diagnosis, treatment, and postoperative management of thyroid cancer. These findings were used to establish a better multi-disciplinary treatment and prevention management strategy and to individualize the treatment of patients in relation to their gut microbiota composition and pathological characteristics.
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28
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Lee SY, Kim S, Han K, Woong Choi J, Byung Chae H, Yeon Choi D, Min Lee S, Kyun Park M, Mun S, Koo JW. Microarray analysis of lipopolysaccharide-induced endotoxemia in the cochlea. Gene 2022; 823:146347. [PMID: 35227853 DOI: 10.1016/j.gene.2022.146347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 02/06/2022] [Accepted: 02/15/2022] [Indexed: 11/24/2022]
Abstract
Lipopolysaccharide (LPS)-induced endotoxemia alters intracochlear homeostasis and potentiates aminoglycoside-induced ototoxicity. However, the pathological mechanisms in the cochlea following systemic LPS-induced inflammation are unclear. In this study, three groups of mice received intraperitoneal injections [group A, saline control (n = 10); group B, 1 mg/kg LPS (n = 10); group C, 10 mg/kg LPS (n = 10)]. After 24 h, gene expression in cochlea samples was analyzed using DNA microarrays covering 28,853 genes in a duplicate manner. A total of 505 differentially expressed genes (DEGs) (≥2.0-fold change; p < 0.05) were identified. Interferon- and chemotaxis-related genes, including gbp2, gbp5, cxcl10, and Rnf125, were dose-dependently upregulated by LPS-induced endotoxemia. These results were verified by RT-qPCR. Upregulated DEGs were associated with inflammation, positive regulation of immune responses, and regulation of cell adhesion, while downregulated ones were associated with chemical synaptic transmission and the synaptic vesicle cycle. Protein-protein interaction included four functional clusters associated with interleukin-4, -10, and -13 and G protein-coupled receptor (GPCR) ligand binding; activation of matrix metalloproteinases and collagen degradation; recruitment of amyloid A proteins; and neutrophil degranulation. The findings of this study provide an additional basis on changes in the expression of genes in the cochlea in response to LPS-induced endotoxemia.
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Affiliation(s)
- Sang-Yeon Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, South Korea; Sensory Organ Research Institute, Seoul National University Medical Research Center, South Korea
| | - Songmi Kim
- Center for Bio-Medical Engineering Core Facility, Dankook University, Cheonan 31116, South Korea; Department of Microbiology, College of Science and Technology, Dankook University, Cheonan 31116, South Korea
| | - Kyudong Han
- Center for Bio-Medical Engineering Core Facility, Dankook University, Cheonan 31116, South Korea; Department of Microbiology, College of Science and Technology, Dankook University, Cheonan 31116, South Korea
| | - Jin Woong Choi
- Department of Otorhinolaryngology-Head and Neck Surgery, Chungnam National University, College of Medicine, Daejeon, South Korea
| | - Ho Byung Chae
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, South Korea
| | - Da Yeon Choi
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, South Korea
| | - So Min Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, South Korea
| | - Moo Kyun Park
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, South Korea
| | - Seyoung Mun
- Center for Bio-Medical Engineering Core Facility, Dankook University, Cheonan 31116, South Korea; Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 31116, South Korea.
| | - Ja-Won Koo
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, South Korea; Sensory Organ Research Institute, Seoul National University Medical Research Center, South Korea.
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29
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Young P, Rauch C, Russo I, Gaskell S, Davidson Z, Costa RJ. Plasma endogenous endotoxin core antibody response to exercise in endurance athletes. Int J Sports Med 2022; 43:1023-1032. [PMID: 35426092 PMCID: PMC9622302 DOI: 10.1055/a-1827-3124] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The study aimed to investigate the impact of laboratory-controlled exertional and
exertional-heat stress on concentrations of plasma endogenous endotoxin core
antibody (EndoCAb). Forty-four (males
n=
26 and females
n=
18) endurance trained (
V̇ O2max
56.8min/kg/min) participants completed either: P1–2h
high intensity interval running in 23°C ambient temperature
(T
amb
), P2–2h running at 60% V̇
O
2max
in 35°C T
amb
, or P3–3h running
at 60% V̇ O
2max
in 23°C T
amb
.
Blood samples were collected pre- and post-exercise to determine plasma IgM,
IgA, and IgG concentrations. Overall resting pre-exercise levels for plasma Ig
were 173MMU/ml, 37AMU/ml, and 79GMU/ml, respectively.
Plasma IgM concentration did not substantially change pre- to post-exercise in
all protocols, and the magnitude of pre- to post-exercise change for IgM was not
different between protocols (p=0.135). Plasma IgA and IgG increased pre-
to post-exercise in P2 only (p=0.017 and p=0.016, respectively),
but remained within normative range (35–250MU/ml). P2 resulted
in greater disturbances to plasma IgA (p=0.058) and IgG
(p=0.037), compared with P1 and P3. No substantial differences in
pre-exercise and exercise-associated change was observed for EndoCAb between
biological sexes. Exertional and exertional-heat stress resulted in modest
disturbances to systemic EndoCAb responses, suggesting EndoCAb biomarkers
presents a low sensitivity response to controlled-laboratory experimental
designs within exercise gastroenterology.
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Affiliation(s)
- Pascale Young
- Nutrition Dietetics & Food, Monash University Faculty of Medicine Nursing and Health Sciences, Clayton, Australia
| | - Christopher Rauch
- Nutrition Dietetics & Food, Monash University Faculty of Medicine Nursing and Health Sciences, Clayton, Australia
| | - Isabella Russo
- Nutrition Dietetics & Food, Monash University Faculty of Medicine Nursing and Health Sciences, Clayton, Australia
| | - Stephanie Gaskell
- Nutrition Dietetics & Food, Monash University Faculty of Medicine Nursing and Health Sciences, Clayton, Australia
| | - Zoe Davidson
- Nutrition Dietetics & Food, Monash University Faculty of Medicine Nursing and Health Sciences, Clayton, Australia
| | - Ricardo J.S. Costa
- Nutrition Dietetics & Food, Monash University Faculty of Medicine Nursing and Health Sciences, Clayton, Australia
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30
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Hiengrach P, Visitchanakun P, Finkelman MA, Chancharoenthana W, Leelahavanichkul A. More Prominent Inflammatory Response to Pachyman than to Whole-Glucan Particle and Oat-β-Glucans in Dextran Sulfate-Induced Mucositis Mice and Mouse Injection through Proinflammatory Macrophages. Int J Mol Sci 2022; 23:ijms23074026. [PMID: 35409384 PMCID: PMC8999416 DOI: 10.3390/ijms23074026] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 03/28/2022] [Accepted: 04/01/2022] [Indexed: 02/07/2023] Open
Abstract
(1→3)-β-D-glucans (BG) (the glucose polymers) are recognized as pathogen motifs, and different forms of BGs are reported to have various effects. Here, different BGs, including Pachyman (BG with very few (1→6)-linkages), whole-glucan particles (BG with many (1→6)-glycosidic bonds), and Oat-BG (BG with (1→4)-linkages), were tested. In comparison with dextran sulfate solution (DSS) alone in mice, DSS with each of these BGs did not alter the weight loss, stool consistency, colon injury (histology and cytokines), endotoxemia, serum BG, and fecal microbiome but Pachyman-DSS-treated mice demonstrated the highest serum cytokine elicitation (TNF-α and IL-6). Likewise, a tail vein injection of Pachyman together with intraperitoneal lipopolysaccharide (LPS) induced the highest levels of these cytokines at 3 h post-injection than LPS alone or LPS with other BGs. With bone marrow-derived macrophages, BG induced only TNF-α (most prominent with Pachyman), while LPS with BG additively increased several cytokines (TNF-α, IL-6, and IL-10); inflammatory genes (iNOS, IL-1β, Syk, and NF-κB); and cell energy alterations (extracellular flux analysis). In conclusion, Pachyman induced the highest LPS proinflammatory synergistic effect on macrophages, followed by WGP, possibly through Syk-associated interactions between the Dectin-1 and TLR-4 signal transduction pathways. Selection of the proper form of BGs for specific clinical conditions might be beneficial.
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Affiliation(s)
- Pratsanee Hiengrach
- Center of Excellence on Translational Research in Inflammation and Immunology (CETRII), Department of Microbiology, Chulalongkorn University, Bangkok 10330, Thailand; (P.H.); (P.V.)
| | - Peerapat Visitchanakun
- Center of Excellence on Translational Research in Inflammation and Immunology (CETRII), Department of Microbiology, Chulalongkorn University, Bangkok 10330, Thailand; (P.H.); (P.V.)
| | | | - Wiwat Chancharoenthana
- Tropical Nephrology Research Unit, Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
- Tropical Immunology and Translational Research Unit, Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
- Correspondence: (W.C.); (A.L.); Tel.: +66-2256-4132 (W.C.); Fax: +66-2252-5952 (W.C.)
| | - Asada Leelahavanichkul
- Center of Excellence on Translational Research in Inflammation and Immunology (CETRII), Department of Microbiology, Chulalongkorn University, Bangkok 10330, Thailand; (P.H.); (P.V.)
- Nephrology Unit, Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
- Correspondence: (W.C.); (A.L.); Tel.: +66-2256-4132 (W.C.); Fax: +66-2252-5952 (W.C.)
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31
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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: 37] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [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.
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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
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32
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Pussinen PJ, Kopra E, Pietiäinen M, Lehto M, Zaric S, Paju S, Salminen A. Periodontitis and cardiometabolic disorders: The role of lipopolysaccharide and endotoxemia. Periodontol 2000 2022; 89:19-40. [PMID: 35244966 PMCID: PMC9314839 DOI: 10.1111/prd.12433] [Citation(s) in RCA: 37] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Lipopolysaccharide is a virulence factor of gram-negative bacteria with a crucial importance to the bacterial surface integrity. From the host's perspective, lipopolysaccharide plays a role in both local and systemic inflammation, activates both innate and adaptive immunity, and can trigger inflammation either directly (as a microbe-associated molecular pattern) or indirectly (by inducing the generation of nonmicrobial, danger-associated molecular patterns). Translocation of lipopolysaccharide into the circulation causes endotoxemia, which is typically measured as the biological activity of lipopolysaccharide to induce coagulation of an aqueous extract of blood cells of the assay. Apparently healthy subjects have a low circulating lipopolysaccharide activity, since it is neutralized and cleared rapidly. However, chronic endotoxemia is involved in the pathogenesis of many inflammation-driven conditions, especially cardiometabolic disorders. These include atherosclerotic cardiovascular diseases, obesity, liver diseases, diabetes, and metabolic syndrome, where endotoxemia has been recognized as a risk factor. The main source of endotoxemia is thought to be the gut microbiota. However, the oral dysbiosis in periodontitis, which is typically enriched with gram-negative bacterial species, may also contribute to endotoxemia. As endotoxemia is associated with an increased risk of cardiometabolic disorders, lipopolysaccharide could be considered as a molecular link between periodontal microbiota and cardiometabolic diseases.
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Affiliation(s)
- Pirkko J Pussinen
- Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Elisa Kopra
- Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Milla Pietiäinen
- Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Markku Lehto
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland.,Abdominal Center, Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.,Clinical and Molecular Metabolism, Faculty of Medicine Research Programs, University of Helsinki, Helsinki, Finland
| | - Svetislav Zaric
- Faculty of Dentistry, Oral & Craniofacial Sciences, Kings College London, London, UK
| | - Susanna Paju
- Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Aino Salminen
- Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
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The Rationale and Current Status of Endotoxin Adsorption in the Treatment of Septic Shock. J Clin Med 2022; 11:jcm11030619. [PMID: 35160068 PMCID: PMC8836955 DOI: 10.3390/jcm11030619] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 01/20/2022] [Accepted: 01/24/2022] [Indexed: 02/05/2023] Open
Abstract
Lipopolysaccharide, the main component of the outer membrane of Gram-negative bacteria is a highly potent endotoxin responsible for organ dysfunction in sepsis. It is present in the blood stream not only in Gram-negative infections, but also in Gram-positive and fungal infections, presumably due to sepsis-related disruption of the intestinal barrier. Various pathways, both extra- and intracellular, are involved in sensing endotoxin and non-canonical activation of caspase-mediated pyroptosis is considered to have a major role in sepsis pathophysiology. Endotoxin induces specific pathological alterations in several organs, which contributes to poor outcomes. The adverse consequences of endotoxin in the circulation support the use of anti-endotoxin therapies, yet more than 30 years of experience with endotoxin adsorption therapies have not provided clear evidence in favor of this treatment modality. The results of small studies support timely endotoxin removal guided by measuring the levels of endotoxin; unfortunately, this has not been proven in large, randomized studies. The presence of endotoxemia can be demonstrated in the majority of patients with COVID-19, yet only case reports and case series describing the effects of endotoxin removal in these patients have been published to date. The place of blood purification therapies in the treatment of septic shock has not yet been determined.
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The Role of Gut-Derived Lipopolysaccharides and the Intestinal Barrier in Fatty Liver Diseases. J Gastrointest Surg 2022; 26:671-683. [PMID: 34734369 PMCID: PMC8926958 DOI: 10.1007/s11605-021-05188-7] [Citation(s) in RCA: 65] [Impact Index Per Article: 32.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Accepted: 10/14/2021] [Indexed: 02/06/2023]
Abstract
BACKGROUND Hepatosteatosis is the earliest stage in the pathogenesis of nonalcoholic fatty (NAFLD) and alcoholic liver disease (ALD). As NAFLD is affecting 10-24% of the general population and approximately 70% of obese patients, it carries a large economic burden and is becoming a major reason for liver transplantation worldwide. ALD is a major cause of morbidity and mortality causing 50% of liver cirrhosis and 10% of liver cancer related death. Increasing evidence has accumulated that gut-derived factors play a crucial role in the development and progression of chronic liver diseases. METHODS A selective literature search was conducted in Medline and PubMed, using the terms "nonalcoholic fatty liver disease," "alcoholic liver disease," "lipopolysaccharide," "gut barrier," and "microbiome." RESULTS Gut dysbiosis and gut barrier dysfunction both contribute to chronic liver disease by abnormal regulation of the gut-liver axis. Thereby, gut-derived lipopolysaccharides (LPS) are a key factor in inducing the inflammatory response of liver tissue. The review further underlines that endotoxemia is observed in both NAFLD and ALD patients. LPS plays an important role in conducting liver damage through the LPS-TLR4 signaling pathway. Treatments targeting the gut microbiome and the gut barrier such as fecal microbiota transplantation (FMT), probiotics, prebiotics, synbiotics, and intestinal alkaline phosphatase (IAP) represent potential treatment modalities for NAFLD and ALD. CONCLUSIONS The gut-liver axis plays an important role in the development of liver disease. Treatments targeting the gut microbiome and the gut barrier have shown beneficial effects in attenuating liver inflammation and need to be further investigated.
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Ackland GL, Walker SLM, Jones TF. The Inflammatory Response to Surgery. Perioper Med (Lond) 2022. [DOI: 10.1016/b978-0-323-56724-4.00002-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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36
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Ding S, Jiang H, Fang J, Liu G. Regulatory Effect of Resveratrol on Inflammation Induced by Lipopolysaccharides via Reprograming Intestinal Microbes and Ameliorating Serum Metabolism Profiles. Front Immunol 2021; 12:777159. [PMID: 34868045 PMCID: PMC8634337 DOI: 10.3389/fimmu.2021.777159] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 10/14/2021] [Indexed: 12/17/2022] Open
Abstract
The purpose of this study was to explore the regulatory effect of resveratrol (RES) on lipopolysaccharide (LPS)-induced inflammation and its influence on intestinal microorganisms and serum atlas in murine models during the development of inflammation to explore a novel method for the regulation of inflammation. Mice were randomly assigned to three groups: control (CON), LPS, and RES–LPS. The results showed that RES mitigated the inflammatory damage to the intes-tines and liver induced by LPS. Compared with the LPS group, RES treatment decreased the levels of TNF-α, IL-6, IFN-γ, myeloperoxidase, and alanine aminotransferase in the liver. Serum metabolic profile monitoring showed that, compared with the CON group, LPS decreased the levels of five metabolites, including cycloartomunin and glycerol triundecanoate, and increased the levels of eight metabolites, including N-linoleoyl taurine and PE(O-16:0/20:5(5Z), 8Z, 11Z, 14Z, 17Z). Conversely, RES treatment increased the levels of eight metabolites, including pantothenic acid, homovanillic acid, and S-(formylmethyl)glutathione, and reduced seven metabolites, including lysoPE(20:4(8Z,11Z,14Z,17Z)/0:0) and 13-cis-retinoic acid, etc., in comparison with the LPS group. Moreover, RES treatment alleviated the negative effects of LPS on intestinal microbes by reducing, for instance, the relative abundance of Bacteroidetes and Alistipes, and increasing the relative abundance of Lactobacillus. These results suggest that RES has great potential for preventing in-flammation.
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Affiliation(s)
- Sujuan Ding
- College of Bioscience and Biotechnology, Hunan Agricultural University, Hunan Provincial Engineering Research Center of Applied Microbial Resources Development for Livestock and Poultry, Changsha, China
| | - Hongmei Jiang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Hunan Provincial Engineering Research Center of Applied Microbial Resources Development for Livestock and Poultry, Changsha, China
| | - Jun Fang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Hunan Provincial Engineering Research Center of Applied Microbial Resources Development for Livestock and Poultry, Changsha, China
| | - Gang Liu
- College of Bioscience and Biotechnology, Hunan Agricultural University, Hunan Provincial Engineering Research Center of Applied Microbial Resources Development for Livestock and Poultry, Changsha, China
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37
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Cabral F, Al-Rahem M, Skaggs J, Thomas TA, Kumar N, Wu Q, Fadda P, Yu L, Robinson JM, Kim J, Pandey E, Sun X, Jarjour WN, Rajaram MV, Harris EN, Ganesan LP. Stabilin receptors clear LPS and control systemic inflammation. iScience 2021; 24:103337. [PMID: 34816100 PMCID: PMC8591421 DOI: 10.1016/j.isci.2021.103337] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 09/17/2021] [Accepted: 10/20/2021] [Indexed: 01/17/2023] Open
Abstract
Lipopolysaccharides (LPSs) cause lethal endotoxemia if not rapidly cleared from blood circulation. Liver sinusoidal endothelial cells (LSEC) systemically clear LPS by unknown mechanisms. We discovered that LPS clearance through LSEC involves endocytosis and lysosomal inactivation via Stabilin-1 and 2 (Stab1 and Stab2) but does not involve TLR4. Cytokine production was inversely related to clearance/endocytosis of LPS by LSEC. When exposed to LPS, Stabilin double knockout mice (Stab DK) and Stab1 KO, but not Stab2 KO, showed significantly enhanced systemic inflammatory cytokine production and early death compared with WT mice. Stab1 KO is not significantly different from Stab DK in circulatory LPS clearance, LPS uptake and endocytosis by LSEC, and cytokine production. These data indicate that (1) Stab1 receptor primarily facilitates the proactive clearance of LPS and limits TLR4-mediated inflammation and (2) TLR4 and Stab1 are functionally opposing LPS receptors. These findings suggest that endotoxemia can be controlled by optimizing LPS clearance by Stab1.
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Affiliation(s)
- Fatima Cabral
- Department of Biochemistry, University of Nebraska, Lincoln, NE 68588, USA
| | - Mustafa Al-Rahem
- Department of Internal Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - John Skaggs
- Department of Internal Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Thushara A. Thomas
- Department of Internal Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Naresh Kumar
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH 43210, USA
| | - Qian Wu
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH 43210, USA
| | - Paolo Fadda
- Department of Cancer Biology and Genetics and Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210, USA
| | - Lianbo Yu
- Department of Biomedical Informatics, The Ohio State University, Columbus, OH 43210, USA
| | - John M. Robinson
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210, USA
| | - Jonghan Kim
- Department of Biomedical & Nutritional Sciences, University of Massachusetts Lowell, MA 01854, USA
| | - Ekta Pandey
- Department of Biochemistry, University of Nebraska, Lincoln, NE 68588, USA
| | - Xinghui Sun
- Department of Biochemistry, University of Nebraska, Lincoln, NE 68588, USA
| | - Wael N. Jarjour
- Department of Internal Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Murugesan V.S. Rajaram
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH 43210, USA
| | - Edward N. Harris
- Department of Biochemistry, University of Nebraska, Lincoln, NE 68588, USA
| | - Latha P. Ganesan
- Department of Internal Medicine, The Ohio State University, Columbus, OH 43210, USA
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Wang YJ, Su J, Yu JJ, Yan MQ, Shi ML, Huang QD, Li B, Wu WY, Xia RS, Li SF, Chen SH, Lv GY. Buddleoside-Rich Chrysanthemum indicum L. Extract has a Beneficial Effect on Metabolic Hypertensive Rats by Inhibiting the Enteric-Origin LPS/TLR4 Pathway. Front Pharmacol 2021; 12:755140. [PMID: 34690786 PMCID: PMC8532163 DOI: 10.3389/fphar.2021.755140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Accepted: 09/24/2021] [Indexed: 01/22/2023] Open
Abstract
As the number of patients with metabolic hypertension (MH) is increasing, there is an essential require for global measures to prevent and treat MH. Flavonoids such as buddleoside (BUD) from Chrysanthemum indicum L. are the main pharmacological components of cardiovascular activities. Previous studies have suggested that the buddleoside-rich Chrysanthemum indicum L. extract (BUDE) can reduce blood pressure in spontaneously hypertensive rats (SHR). However, its effect on MH and how it works remains to be researched. In this study, it was observed that BUDE could lower blood pressure, improve dyslipidemia, and decrease the level of plasma LPS in MH rats. Moreover, BUDE improved intestinal flora and increased the expression of occludin and claudin-1 in the colon, and improved the pathological injury of the colon. Western bolt and qRT-PCR experiments showed that BUDE could down-regulate TLR4 and MyD88 protein and mRNA expression and inhibit phosphorylation of IKKβ, IκBα and NF-κB p65 in vessels of MH rats. These results showed that BUDE could regulate intestinal flora, improve intestinal barrier function, reduce the production and penetration of LPS, thereby inhibiting the vascular TLR4/MyD88 pathway, improving vascular endothelial function, and ultimately lowering blood pressure in MH rats. This study provides a new mechanism of BUDE against MH by inhibiting the enteric-origin LPS/TLR4 pathway.
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Affiliation(s)
- Ya-Jun Wang
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Jie Su
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Jing-Jing Yu
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Mei-Qiu Yan
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Meng-Lin Shi
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Qi-Di Huang
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Bo Li
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, China
| | - Wen-Yan Wu
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Rong-Shuang Xia
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Si-Fan Li
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Su-Hong Chen
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, China
| | - Gui-Yuan Lv
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
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Erlanson-Albertsson C, Stenkula KG. The Importance of Food for Endotoxemia and an Inflammatory Response. Int J Mol Sci 2021; 22:ijms22179562. [PMID: 34502470 PMCID: PMC8431640 DOI: 10.3390/ijms22179562] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 08/23/2021] [Accepted: 08/30/2021] [Indexed: 11/16/2022] Open
Abstract
Bacterial endotoxin is a potent inflammatory antigen abundant in the human intestine. Endotoxins circulate in the blood at low concentrations in all healthy individuals. Elevated levels of circulatory endotoxins may cause inflammation with the development of chronic disease, either affecting metabolism, neurological disease, or resistance to viral and bacterial infections. The most important endotoxin is LPS, being a superantigen. In this narrative review, the effect of various food components to postprandially elevate circulating LPS and inflammatory markers is described. There is evidence that the intake of food enriched in fat, in particular saturated fat, may elevate LPS and pro-inflammatory markers. This occurs in both normal-weight and obese subjects. In obese subjects, inflammatory markers are already elevated before meal consumption. The importance of food choice for endotoxemia and inflammatory response is discussed.
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Affiliation(s)
- Charlotte Erlanson-Albertsson
- Appetite Control, Department of Experimental Medical Science, BMC, Lund University, 221 84 Lund, Sweden
- Correspondence: ; Tel.: +46-46-222-85-89 or +46-70-301-12-25
| | - Karin G. Stenkula
- Glucose Transport and Protein Trafficking, Department of Experimental Medical Science, BMC, Lund University, 221 84 Lund, Sweden;
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Native Low-Density Lipoproteins Act in Synergy with Lipopolysaccharide to Alter the Balance of Human Monocyte Subsets and Their Ability to Produce IL-1 Beta, CCR2, and CX3CR1 In Vitro and In Vivo: Implications in Atherogenesis. Biomolecules 2021; 11:biom11081169. [PMID: 34439835 PMCID: PMC8391227 DOI: 10.3390/biom11081169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 07/29/2021] [Accepted: 08/04/2021] [Indexed: 12/17/2022] Open
Abstract
Increasing evidence has demonstrated that oxidized low-density lipoproteins (oxLDL) and lipopolysaccharide (LPS) enhance accumulation of interleukin (IL)-1 beta-producing macrophages in atherosclerotic lesions. However, the potential synergistic effect of native LDL (nLDL) and LPS on the inflammatory ability and migration pattern of monocyte subpopulations remains elusive and is examined here. In vitro, whole blood cells from healthy donors (n = 20) were incubated with 100 μg/mL nLDL, 10 ng/mL LPS, or nLDL + LPS for 9 h. Flow cytometry assays revealed that nLDL significantly decreases the classical monocyte (CM) percentage and increases the non-classical monocyte (NCM) subset. While nLDL + LPS significantly increased the number of NCMs expressing IL-1 beta and the C-C chemokine receptor type 2 (CCR2), the amount of NCMs expressing the CX3C chemokine receptor 1 (CX3CR1) decreased. In vivo, patients (n = 85) with serum LDL-cholesterol (LDL-C) >100 mg/dL showed an increase in NCM, IL-1 beta, LPS-binding protein (LBP), and Castelli’s atherogenic risk index as compared to controls (n = 65) with optimal LDL-C concentrations (≤100 mg/dL). This work demonstrates for the first time that nLDL acts in synergy with LPS to alter the balance of human monocyte subsets and their ability to produce inflammatory cytokines and chemokine receptors with prominent roles in atherogenesis.
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Alpers DH. Is the Intestine a Portal of Entry for the Serious COVID-19 Complications of Endotoxemia and Thrombosis? Clin Transl Gastroenterol 2021; 12:e00367. [PMID: 34092778 PMCID: PMC8183696 DOI: 10.14309/ctg.0000000000000367] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 04/28/2021] [Indexed: 01/12/2023] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 infection has been associated with both endotoxemia and thrombosis of small and large vessels, but the relationship between these 2 phenomena has not been pursued. Oliva et al. in this issue of Clinical and Translational Gastroenterology demonstrate an association between the 2 findings and suggest that increased intestinal permeability is a possible mechanism to explain the endotoxemia. Although the evidence to support this hypothesis is only suggestive, the role of the small intestine in the illness produced by the virus needs to be further explored.
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Affiliation(s)
- David H Alpers
- Department of Internal Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
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42
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Oliva A, Cammisotto V, Cangemi R, Ferro D, Miele MC, De Angelis M, Cancelli F, Pignatelli P, Venditti M, Pugliese F, Mastroianni CM, Violi F. Low-Grade Endotoxemia and Thrombosis in COVID-19. Clin Transl Gastroenterol 2021; 12:e00348. [PMID: 34092777 PMCID: PMC8183715 DOI: 10.14309/ctg.0000000000000348] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 03/12/2021] [Indexed: 01/01/2023] Open
Abstract
INTRODUCTION Patients with community-acquired pneumonia display enhanced levels of lipopolysaccharides (LPS) compared with controls, suggesting that low-grade endotoxemia may be implicated in vascular disturbances. It is unknown whether this occurs in patients with coronavirus 2019 (COVID-19) and its impact on thrombotic complications. METHODS We measured serum levels of zonulin, a marker of gut permeability, LPS, and D-dimer in 81 patients with COVID-19 and 81 healthy subjects; the occurrence of thrombotic events in COVID-19 during the intrahospital stay was registered. RESULTS Serum LPS and zonulin were higher in patients with COVID-19 than in control subjects and, in COVID-19, significantly correlated (R = 0.513; P < 0.001). Among the 81 patients with COVID-19, 11 (14%) experienced thrombotic events in the arterial (n = 5) and venous circulation (n = 6) during a median follow-up of 18 days (interquartile range 11-27 days). A logistic regression analysis showed that LPS (P = 0.024) and D-dimer (P = 0.041) independently predicted thrombotic events. DISCUSSION The study reports that low-grade endotoxemia is detectable in patients with COVID-19 and is associated with thrombotic events. The coexistence of low-grade endotoxemia with enhanced levels of zonulin may suggest enhanced gut permeability as an underlying mechanism.
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Affiliation(s)
- Alessandra Oliva
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - Vittoria Cammisotto
- Department of General Surgery and Surgical Speciality Paride Stefanini, Sapienza University of Rome, Rome, Italy
| | - Roberto Cangemi
- Department of Translational and Precision Medicine, Sapienza University of Rome, Rome, Italy
| | - Domenico Ferro
- Department of Clinical Internal, Anesthesiologic and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
| | - Maria Claudia Miele
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - Massimiliano De Angelis
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - Francesca Cancelli
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - Pasquale Pignatelli
- Department of Clinical Internal, Anesthesiologic and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
- Mediterranea Cardiocentro, Naples, Italy
| | - Mario Venditti
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - Francesco Pugliese
- Department of General Surgery and Surgical Speciality Paride Stefanini, Sapienza University of Rome, Rome, Italy
| | | | - Francesco Violi
- Department of Clinical Internal, Anesthesiologic and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
- Mediterranea Cardiocentro, Naples, Italy
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Fu S, Meng Q, Zhang D, Zuo S, He J, Guo L, Qiu Y, Ye C, Liu Y, Hu CAA. Effect of Baicalin on Transcriptome Changes in Piglet Vascular Endothelial Cells Induced by a Combination of Glaesserella parasuis and Lipopolysaccharide. DNA Cell Biol 2021; 40:776-790. [PMID: 34029124 DOI: 10.1089/dna.2020.6442] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Glaesserella parasuis causes porcine Glässer's disease and lipopolysaccharide (LPS) induces acute inflammation and pathological damage. Baicalin has antioxidant, antimicrobial, and anti-inflammatory functions. Long noncoding RNAs (lncRNAs) play key regulatory functions during bacterial infection. However, the role of lncRNAs in the vascular dysfunction induced by a combination of G. parasuis and LPS during systemic inflammation and the effect of baicalin on lncRNA expression induced in porcine aortic vascular endothelial cells (PAVECs) by a combination of G. parasuis and LPS have not been investigated. In this study, we investigated the changes in lncRNA and mRNA expression induced in PAVECs by G. parasuis, LPS, or a combination of G. parasuis and LPS, and the action of baicalin on lncRNA expression induced in PAVECs by the combination of G. parasuis and LPS. Our results showed 133 lncRNAs and 602 genes were differentially expressed when PAVECs were stimulated with the combination of G. parasuis and LPS, whereas 107 lncRNAs and 936 genes were differentially expressed when PAVECs were stimulated with the combination of G. parasuis and LPS after pretreatment with baicalin. The Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis showed the dominant signaling pathways triggered by the combination of G. parasuis and LPS were the tumor necrosis factor signaling pathway, phosphatidylinositol signaling system, and inositol phosphate metabolism. Protein-protein interaction network analysis showed the differentially expressed target genes of the differentially expressed lncRNAs (DELs) were related to each other. A coexpression analysis indicated the expression levels of the DELs were co-regulated with those of their differentially expressed target genes. This is the first study to systematically compare the changes in lncRNAs and mRNAs in PAVECs stimulated with a combination of G. parasuis and LPS. Our data clarified the mechanisms underlying the vascular inflammation and damage triggered by G. parasuis and LPS, and it may provide novel targets for the treatment of LPS-induced systemic inflammation.
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Affiliation(s)
- Shulin Fu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, P.R. China.,Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, P.R. China.,Key Laboratory of Prevention and Control Agents for Animal Bacteriosis (Ministry of Agriculture and Rural Affairs), Wuhan, P.R. China
| | - Qingyan Meng
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, P.R. China.,Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, P.R. China
| | - Dan Zhang
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, P.R. China.,Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, P.R. China
| | - Sanling Zuo
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, P.R. China.,Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, P.R. China
| | - Jing He
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, P.R. China.,Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, P.R. China
| | - Ling Guo
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, P.R. China.,Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, P.R. China
| | - Yinsheng Qiu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, P.R. China.,Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, P.R. China
| | - Chun Ye
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, P.R. China.,Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, P.R. China
| | - Yulan Liu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, P.R. China.,Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, P.R. China
| | - Chien-An Andy Hu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, P.R. China.,Biochemistry and Molecular Biology, University of New Mexico School of Medicine, Albuquerque, New Mexico, USA
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44
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Nguyen M, Pallot G, Jalil A, Tavernier A, Dusuel A, Le Guern N, Lagrost L, Pais de Barros JP, Choubley H, Bergas V, Guinot PG, Masson D, Bouhemad B, Gautier T. Intra-Abdominal Lipopolysaccharide Clearance and Inactivation in Peritonitis: Key Roles for Lipoproteins and the Phospholipid Transfer Protein. Front Immunol 2021; 12:622935. [PMID: 34054798 PMCID: PMC8149805 DOI: 10.3389/fimmu.2021.622935] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Accepted: 04/21/2021] [Indexed: 01/22/2023] Open
Abstract
Introduction During peritonitis, lipopolysaccharides (LPS) cross the peritoneum and pass through the liver before reaching the central compartment. The aim of the present study was to investigate the role of lipoproteins and phospholipid transfer protein (PLTP) in the early stages of LPS detoxification. Material and Methods Peritonitis was induced by intra-peritoneal injection of LPS in mice. We analyzed peritoneal fluid, portal and central blood. Lipoprotein fractions were obtained by ultracentrifugation and fast protein liquid chromatography. LPS concentration and activity were measured by liquid chromatography coupled with mass spectrometry and limulus amoebocyte lysate. Wild-type mice were compared to mice knocked out for PLTP. Results In mice expressing PLTP, LPS was able to bind to HDL in the peritoneal compartment, and this was maintained in plasma from portal and central blood. A hepatic first-pass effect of HDL-bound LPS was observed in wild-type mice. LPS binding to HDL resulted in an early arrival of inactive LPS in the central blood of wild-type mice. Conclusion PLTP promotes LPS peritoneal clearance and neutralization in a model of peritonitis. This mechanism involves the early binding of LPS to lipoproteins inside the peritoneal cavity, which promotes LPS translocation through the peritoneum and its uptake by the liver.
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Affiliation(s)
- Maxime Nguyen
- Department of Anesthesiology and Intensive Care, Dijon University Hospital, Dijon, France
- Université Bourgogne Franche-Comté / Agrosup, Lipids Nutrition Cancer (LNC) UMR1231, Dijon, France
- INSERM, LNC UMR1231, Dijon, France
- FCS Bourgogne-Franche Comté, LipSTIC LabEx, Dijon, France
| | - Gaëtan Pallot
- INSERM, LNC UMR1231, Dijon, France
- FCS Bourgogne-Franche Comté, LipSTIC LabEx, Dijon, France
| | - Antoine Jalil
- INSERM, LNC UMR1231, Dijon, France
- FCS Bourgogne-Franche Comté, LipSTIC LabEx, Dijon, France
| | - Annabelle Tavernier
- INSERM, LNC UMR1231, Dijon, France
- FCS Bourgogne-Franche Comté, LipSTIC LabEx, Dijon, France
| | - Aloïs Dusuel
- INSERM, LNC UMR1231, Dijon, France
- FCS Bourgogne-Franche Comté, LipSTIC LabEx, Dijon, France
| | - Naig Le Guern
- INSERM, LNC UMR1231, Dijon, France
- FCS Bourgogne-Franche Comté, LipSTIC LabEx, Dijon, France
| | - Laurent Lagrost
- Université Bourgogne Franche-Comté / Agrosup, Lipids Nutrition Cancer (LNC) UMR1231, Dijon, France
- INSERM, LNC UMR1231, Dijon, France
- FCS Bourgogne-Franche Comté, LipSTIC LabEx, Dijon, France
| | - Jean-Paul Pais de Barros
- INSERM, LNC UMR1231, Dijon, France
- Lipidomic Analytical Platform, Université Bourgogne Franche-Comté (UBFC), Dijon, France
| | - Hélène Choubley
- INSERM, LNC UMR1231, Dijon, France
- Lipidomic Analytical Platform, Université Bourgogne Franche-Comté (UBFC), Dijon, France
| | - Victoria Bergas
- INSERM, LNC UMR1231, Dijon, France
- Lipidomic Analytical Platform, Université Bourgogne Franche-Comté (UBFC), Dijon, France
| | - Pierre-Grégoire Guinot
- Department of Anesthesiology and Intensive Care, Dijon University Hospital, Dijon, France
- Université Bourgogne Franche-Comté / Agrosup, Lipids Nutrition Cancer (LNC) UMR1231, Dijon, France
- INSERM, LNC UMR1231, Dijon, France
- FCS Bourgogne-Franche Comté, LipSTIC LabEx, Dijon, France
| | - David Masson
- Université Bourgogne Franche-Comté / Agrosup, Lipids Nutrition Cancer (LNC) UMR1231, Dijon, France
- INSERM, LNC UMR1231, Dijon, France
- FCS Bourgogne-Franche Comté, LipSTIC LabEx, Dijon, France
- Laboratory of Clinical Chemistry, François Mitterrand University Hospital, Dijon, France
| | - Belaid Bouhemad
- Department of Anesthesiology and Intensive Care, Dijon University Hospital, Dijon, France
- Université Bourgogne Franche-Comté / Agrosup, Lipids Nutrition Cancer (LNC) UMR1231, Dijon, France
- INSERM, LNC UMR1231, Dijon, France
- FCS Bourgogne-Franche Comté, LipSTIC LabEx, Dijon, France
| | - Thomas Gautier
- Université Bourgogne Franche-Comté / Agrosup, Lipids Nutrition Cancer (LNC) UMR1231, Dijon, France
- INSERM, LNC UMR1231, Dijon, France
- FCS Bourgogne-Franche Comté, LipSTIC LabEx, Dijon, France
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45
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Mohr AE, Gumpricht E, Sears DD, Sweazea KL. Recent advances and health implications of dietary fasting regimens on the gut microbiome. Am J Physiol Gastrointest Liver Physiol 2021; 320:G847-G863. [PMID: 33729005 DOI: 10.1152/ajpgi.00475.2020] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Calorie restriction is a primary dietary intervention demonstrated over many decades in cellular and animal models to modulate aging pathways, positively affect age-associated diseases and, in clinical studies, to promote beneficial health outcomes. Because long-term compliance with daily calorie restriction has proven problematic in humans several intermittent fasting regimens, including alternate day fasting and time-restricted feeding, have evolved revealing similar clinical benefits as calorie restriction. Despite significant research on the cellular and physiological mechanisms contributing to, and responsible for, these observed benefits, relatively little research has investigated the impact of these various fasting protocols on the gut microbiome (GM). Reduced external nutrient supply to the gut may beneficially alter the composition and function of a "fed" gut microflora. Indeed, the prevalent, obesogenic Western diet can promote deleterious changes in the GM, signaling intermediates involved in lipid and glucose metabolism, and immune responses in the gastrointestinal tract. This review describes recent preclinical and clinical effects of varying fasting regimens on GM composition and associated physiology. Although the number of preclinical and clinical interventions are limited, significant data thus far suggest fasting interventions impact GM composition and physiology. However, there are considerable heterogeneities of study design, methodological considerations, and practical implications. Ongoing research on the health impact of fasting regimens on GM modulation is warranted.
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Affiliation(s)
- Alex E Mohr
- College of Health Solutions, Arizona State University, Phoenix, Arizona.,Isagenix International LLC, Gilbert, Arizona
| | | | - Dorothy D Sears
- College of Health Solutions, Arizona State University, Phoenix, Arizona
| | - Karen L Sweazea
- College of Health Solutions, Arizona State University, Phoenix, Arizona.,School of Life Sciences, Arizona State University, Tempe, Arizona
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Vitkov L, Muñoz LE, Knopf J, Schauer C, Oberthaler H, Minnich B, Hannig M, Herrmann M. Connection between Periodontitis-Induced Low-Grade Endotoxemia and Systemic Diseases: Neutrophils as Protagonists and Targets. Int J Mol Sci 2021; 22:4647. [PMID: 33925019 PMCID: PMC8125370 DOI: 10.3390/ijms22094647] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/22/2021] [Accepted: 04/26/2021] [Indexed: 12/11/2022] Open
Abstract
Periodontitis is considered a promoter of many systemic diseases, but the signaling pathways of this interconnection remain elusive. Recently, it became evident that certain microbial challenges promote a heightened response of myeloid cell populations to subsequent infections either with the same or other pathogens. This phenomenon involves changes in the cell epigenetic and transcription, and is referred to as ''trained immunity''. It acts via modulation of hematopoietic stem and progenitor cells (HSPCs). A main modulation driver is the sustained, persistent low-level transmission of lipopolysaccharide from the periodontal pocket into the peripheral blood. Subsequently, the neutrophil phenotype changes and neutrophils become hyper-responsive and prone to boosted formation of neutrophil extracellular traps (NET). Cytotoxic neutrophil proteases and histones are responsible for ulcer formations on the pocket epithelium, which foster bacteremia and endoxemia. The latter promote systemic low-grade inflammation (SLGI), a precondition for many systemic diseases and some of them, e.g., atherosclerosis, diabetes etc., can be triggered by SLGI alone. Either reverting the polarized neutrophils back to the homeostatic state or attenuation of neutrophil hyper-responsiveness in periodontitis might be an approach to diminish or even to prevent systemic diseases.
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Affiliation(s)
- Ljubomir Vitkov
- Vascular & Exercise Biology Unit, Department of Biosciences, University of Salzburg, 5020 Salzburg, Austria; (L.V.); (H.O.); (B.M.)
- Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, Saarland University, 66424 Homburg, Germany
| | - Luis E. Muñoz
- Department of Internal Medicine 3—Rheumatology and Immunology, Universitätsklinikum Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), 91052 Erlangen, Germany; (L.E.M.); (J.K.); (C.S.); (M.H.)
| | - Jasmin Knopf
- Department of Internal Medicine 3—Rheumatology and Immunology, Universitätsklinikum Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), 91052 Erlangen, Germany; (L.E.M.); (J.K.); (C.S.); (M.H.)
| | - Christine Schauer
- Department of Internal Medicine 3—Rheumatology and Immunology, Universitätsklinikum Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), 91052 Erlangen, Germany; (L.E.M.); (J.K.); (C.S.); (M.H.)
| | - Hannah Oberthaler
- Vascular & Exercise Biology Unit, Department of Biosciences, University of Salzburg, 5020 Salzburg, Austria; (L.V.); (H.O.); (B.M.)
| | - Bernd Minnich
- Vascular & Exercise Biology Unit, Department of Biosciences, University of Salzburg, 5020 Salzburg, Austria; (L.V.); (H.O.); (B.M.)
| | - Matthias Hannig
- Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, Saarland University, 66424 Homburg, Germany
| | - Martin Herrmann
- Department of Internal Medicine 3—Rheumatology and Immunology, Universitätsklinikum Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), 91052 Erlangen, Germany; (L.E.M.); (J.K.); (C.S.); (M.H.)
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47
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Canale MP, Noce A, Di Lauro M, Marrone G, Cantelmo M, Cardillo C, Federici M, Di Daniele N, Tesauro M. Gut Dysbiosis and Western Diet in the Pathogenesis of Essential Arterial Hypertension: A Narrative Review. Nutrients 2021; 13:nu13041162. [PMID: 33915885 PMCID: PMC8066853 DOI: 10.3390/nu13041162] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 03/23/2021] [Accepted: 03/26/2021] [Indexed: 12/12/2022] Open
Abstract
Metabolic syndrome is a cluster of the most dangerous cardiovascular (CV) risk factors including visceral obesity, insulin resistance, hyperglycemia, alterations in lipid metabolism and arterial hypertension (AH). In particular, AH plays a key role in the complications associated with metabolic syndrome. High salt intake is a well-known risk factor for AH and CV diseases. Vasoconstriction, impaired vasodilation, extracellular volume expansion, inflammation, and an increased sympathetic nervous system (SNS) activity are the mechanisms involved in the pathogenesis of AH, induced by Western diet. Gut dysbiosis in AH is associated with reduction of short chain fatty acid-producing bacteria: acetate, butyrate and propionate, which activate different pathways, causing vasoconstriction, impaired vasodilation, salt and water retention and a consequent high blood pressure. Moreover, increased trimethylamine N-oxide and lipopolysaccharides trigger chronic inflammation, which contributes to endothelial dysfunction and target organs damage. Additionally, a high salt-intake diet impacts negatively on gut microbiota composition. A bidirectional neuronal pathway determines the “brain–gut” axis, which, in turn, influences blood pressure levels. Then, we discuss the possible adjuvant novel treatments related to gut microbiota modulation for AH control.
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Affiliation(s)
- Maria Paola Canale
- Department of Systems Medicine, University of Rome Tor Vergata, Via Montpellier 1, 00133 Rome, Italy; (M.P.C.); (M.F.)
| | - Annalisa Noce
- UOC of Internal Medicine-Center of Hypertension and Nephrology Unit, Department of Systems Medicine, University of Rome Tor Vergata, Via Montpellier 1, 00133 Rome, Italy; (M.D.L.); (G.M.); (N.D.D.)
- Correspondence: (A.N.); (M.T.); Tel.: +39-06-2090-2194 (A.N.); +39-06-2090-2982 (M.T.)
| | - Manuela Di Lauro
- UOC of Internal Medicine-Center of Hypertension and Nephrology Unit, Department of Systems Medicine, University of Rome Tor Vergata, Via Montpellier 1, 00133 Rome, Italy; (M.D.L.); (G.M.); (N.D.D.)
| | - Giulia Marrone
- UOC of Internal Medicine-Center of Hypertension and Nephrology Unit, Department of Systems Medicine, University of Rome Tor Vergata, Via Montpellier 1, 00133 Rome, Italy; (M.D.L.); (G.M.); (N.D.D.)
- PhD School of Applied Medical, Surgical Sciences, University of Rome Tor Vergata, Via Montpellier 1, 00133 Rome, Italy
| | - Maria Cantelmo
- School of Specialization in Geriatrics, University of Rome Tor Vergata, 00133 Rome, Italy;
| | - Carmine Cardillo
- Department of Internal Medicine and Geriatrics, Policlinico A. Gemelli IRCCS, 00168 Roma, Italy;
| | - Massimo Federici
- Department of Systems Medicine, University of Rome Tor Vergata, Via Montpellier 1, 00133 Rome, Italy; (M.P.C.); (M.F.)
| | - Nicola Di Daniele
- UOC of Internal Medicine-Center of Hypertension and Nephrology Unit, Department of Systems Medicine, University of Rome Tor Vergata, Via Montpellier 1, 00133 Rome, Italy; (M.D.L.); (G.M.); (N.D.D.)
| | - Manfredi Tesauro
- UOC of Internal Medicine-Center of Hypertension and Nephrology Unit, Department of Systems Medicine, University of Rome Tor Vergata, Via Montpellier 1, 00133 Rome, Italy; (M.D.L.); (G.M.); (N.D.D.)
- Correspondence: (A.N.); (M.T.); Tel.: +39-06-2090-2194 (A.N.); +39-06-2090-2982 (M.T.)
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Targeting the endocannabinoid system with microbial interventions to improve gut integrity. Prog Neuropsychopharmacol Biol Psychiatry 2021; 106:110169. [PMID: 33186639 DOI: 10.1016/j.pnpbp.2020.110169] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 10/20/2020] [Accepted: 11/04/2020] [Indexed: 12/16/2022]
Abstract
The endocannabinoid system is a metabolic pathway involved in the communication between the gut microbiota and the host. In the gut, the endocannabinoid system regulates the integrity of the intestinal barrier. A compromised integrity of the intestinal barrier is associated with several disorders such as inflammatory bowel disorder, obesity and major depressive disorder. Decreasing the integrity of the intestinal barrier results in an increased translocation of bacterial metabolites, including lipopolysaccharides, across the epithelial layer of the gut, causing the subsequent inflammation. Targeting the endocannabinoid system in the gut can improve the integrity of the intestinal barrier. Currently, microbial interventions in the form of probiotics are under investigation for the treatment of diseases related to a compromised integrity of the intestinal barrier. However, the role of the endocannabinoid system in the gut is ambiguous since activity of the endocannabinoid system is increased in obesity and decreased in inflammatory bowel disease, emphasizing the need for development of personalized microbial interventions. This review discusses the role of the endocannabinoid system in regulating the gut barrier integrity and highlights current efforts to develop new endocannabinoid-targeted microbial interventions.
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49
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Sarmikasoglou E, Faciola AP. Ruminal Lipopolysaccharides Analysis: Uncharted Waters with Promising Signs. Animals (Basel) 2021; 11:ani11010195. [PMID: 33467503 PMCID: PMC7831013 DOI: 10.3390/ani11010195] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Revised: 01/11/2021] [Accepted: 01/12/2021] [Indexed: 12/12/2022] Open
Abstract
Simple Summary Lipopolysaccharide (LPS) is a component of the outer membranes of Gram-negative bacterial cell wall made of three covalently linked regions: the O-antigen, the core oligosaccharide, and the endotoxin lipid A moiety, which carries the endotoxic activity of LPS. Among Gram-negative bacteria there is significant structural diversity in the lipid A region. Specifically, the number of lipid A acyl chains directly correlates with the ability to induce cytokine production whereas the hexa-acylated forms usually are the most immunostimulant ones, contrary to penta- or tetra- acylated forms that result in weak inflammatory host responses. Ruminal bacteria are predominantly Gram-negative, and their respective LPS presence has been suggested to be associated with ruminal acidosis, a metabolic disorder of cattle with negative effects on health and production. In the rumen, the most predominant phylum is Bacteroidetes which exhibit weak host immunological response compared to widely used Escherichia coli LPS. This review aims to present accumulated knowledge regarding ruminal LPS, pointing out the differences in ruminal LPS compared to widely known LPS, and introduce hypotheses that could contribute to further understanding and planning strategies to tackle ruminal acidosis. Abstract The objective of this review is to present the need for the development of a comprehensive ruminal lipopolysaccharide (LPS) extraction, purification and analysis protocol and state hypotheses that could contribute to planning novel strategies against ruminal acidosis. Lipopolysaccharide is an immunostimulatory molecule of Gram-negative bacterial outer membranes and has been reported to contribute to ruminal acidosis in cattle. Bacterial death and lysis are normal processes, and thus LPS is normally present in ruminal fluid. However, ruminal LPS concentration is much greater during subacute ruminal acidosis (SARA). Contrary to the widely known LPSs, ruminal LPS seems to be composed of a variety of LPS chemotypes that may interact with each other resulting in an LPS “mixture”. Hypotheses regarding the influence of each specific ruminal bacterial specie to innate immunity during SARA, and the representativeness of the exclusive use of the Escherichia coli LPS to rumen epithelial tissue challenges, could expand our knowledge regarding SARA. In addition, possible correlation between the monomeric Toll-like Receptor 4 (TRL4) and the antagonistic penta-acylated lipid A of LPS could contribute to novel strategies to tackle this nutrition disorder.
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50
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Massier L, Blüher M, Kovacs P, Chakaroun RM. Impaired Intestinal Barrier and Tissue Bacteria: Pathomechanisms for Metabolic Diseases. Front Endocrinol (Lausanne) 2021; 12:616506. [PMID: 33767669 PMCID: PMC7985551 DOI: 10.3389/fendo.2021.616506] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 02/02/2021] [Indexed: 02/06/2023] Open
Abstract
An intact intestinal barrier, representing the interface between inner and outer environments, is an integral regulator of health. Among several factors, bacteria and their products have been evidenced to contribute to gut barrier impairment and its increased permeability. Alterations of tight junction integrity - caused by both external factors and host metabolic state - are important for gut barrier, since they can lead to increased influx of bacteria or bacterial components (endotoxin, bacterial DNA, metabolites) into the host circulation. Increased systemic levels of bacterial endotoxins and DNA have been associated with an impaired metabolic host status, manifested in obesity, insulin resistance, and associated cardiovascular complications. Bacterial components and cells are distributed to peripheral tissues via the blood stream, possibly contributing to metabolic diseases by increasing chronic pro-inflammatory signals at both tissue and systemic levels. This response is, along with other yet unknown mechanisms, mediated by toll like receptor (TLR) transduction and increased expression of pro-inflammatory cytokines, which in turn can further increase intestinal permeability leading to a detrimental positive feedback loop. The modulation of gut barrier function through nutritional and other interventions, including manipulation of gut microbiota, may represent a potential prevention and treatment target for metabolic diseases.
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Affiliation(s)
- Lucas Massier
- Medical Department III – Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, Leipzig, Germany
- Department of Medicine (H7), Karolinska Institutet, Karolinska University Hospital, Huddinge, Stockholm, Sweden
| | - Matthias Blüher
- Medical Department III – Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, Leipzig, Germany
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI-MAG) of the Helmholtz Zentrum München, University Hospital Leipzig, University of Leipzig, Leipzig, Germany
| | - Peter Kovacs
- Medical Department III – Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, Leipzig, Germany
| | - Rima M. Chakaroun
- Medical Department III – Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, Leipzig, Germany
- *Correspondence: Rima M. Chakaroun,
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