Fucoxanthin, a Marine Xanthophyll Isolated From Conticribra weissflogii ND-8: Preventive Anti-Inflammatory Effect in a Mouse Model of Sepsis

In this study, we aimed at evaluation the efficacy of the FX in a model of sepsis mouse. Methods: FX was successfully isolated from Conticribra weissflogii ND-8 for the first time. The FX was identified by thin-layer chromatography (TLC), high-performance liquid chromatography-mass spectrometry (HPLC-MS), and nuclear magnetic resonance (NMR). Animals were randomly divided into 9 groups, including Sham group (mouse received an intraperitoneal injection of normal saline 1.0 mL/kg), FX-treated (0.1–10.0 mg/kg), Lipopolysaccharide (LPS)-treated (20 mg/kg), FX+LPS-treated (0.1–10.0 mg/kg and 20 mg/kg, respectively), and urinastatin groups (104 U/kg). Nuclear factor (NF)-κB activation could be potential treatment for sepsis. Inflammasome components were determined by western-blotting. IL-6, IL-1β, TNF-α production, and NF-κB activation were evaluated by ELISA and immunofluorescent staining in vitro. Results: FX was found to decrease the expression of inflammatory cytokines including IL-6, IL-1β, and TNF-α, in the LPS-induced sepsis mouse model. Meanwhile, FX significantly- inhibits phosphorylation of the NF-κB signaling pathway induced by LPS at the cellular level and reduces the nuclear translocation of NF-κB. The IC50 for suppressing the expression of NF-κB was 11.08 ± 0.78 μM in the THP1-Lucia™ NF-κB cells. Furthermore, FX also inhibits the expression of inflammatory factors in a dose-depen...
Source: Frontiers in Pharmacology - Category: Drugs & Pharmacology Source Type: research

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Albiflorin (AF) is a small molecule (MW 481) isolated from Paeoniae radix, a plant used as a remedy for various conditions with pathogenesis shared by metabolic diseases. Reported here is our characterization of its therapeutic profiles in three mouse models with distinctive pathological features of metabolic syndrome (MetS). Our results firstly showed that AF alleviated high fat (HF) induced obesity and associated glucose intolerance, suggesting its therapeutic efficacy for MetS. In the type 2 diabetes (T2D) model induced by a combination of HF and low doses of streptozotocin, AF lowered hyperglycaemia and improved insuli...
Source: Frontiers in Pharmacology - Category: Drugs & Pharmacology Source Type: research
We examined human lung tissue from COPD patients and normal control subjects, and found a substantial increase in p16-expressing alveolar cells in COPD patients. Using a transgenic mouse deficient for p16, we demonstrated that lungs of mice lacking p16 were structurally and functionally resistant to CS-induced emphysema due to activation of IGF1/Akt regenerative and protective signaling. Fat Tissue Surrounds Skeletal Muscle to Accelerate Atrophy in Aging and Obesity https://www.fightaging.org/archives/2019/09/fat-tissue-surrounds-skeletal-muscle-to-accelerate-atrophy-in-aging-and-obesity/ Researchers her...
Source: Fight Aging! - Category: Research Authors: Tags: Newsletters Source Type: blogs
by Teresa Buenaventura, Stavroula Bitsi, William E. Laughlin, Thomas Burgoyne, Zekun Lyu, Affiong I. Oqua, Hannah Norman, Emma R. McGlone, Andrey S. Klymchenko, Ivan R. Corr êa Jr, Abigail Walker, Asuka Inoue, Aylin Hanyaloglu, Jak Grimes, Zsombor Koszegi, Davide Calebiro, Guy A. Rutter, Stephen R. Bloom, Ben Jones, Alejandra Tomas The glucagon-like peptide-1 receptor (GLP-1R), a key pharmacological target in type 2 diabetes (T2D) and obesity, undergoes rapid endocytosis after stimulation by endogenous and therapeutic agonists. We have previously highlighted the relevance of this process in fine-tuning GLP-1R respon...
Source: PLoS Biology: Archived Table of Contents - Category: Biology Authors: Source Type: research
Faria AMC Abstract Alterations in the composition of the intestinal microbiota have been associated with development of type 1 diabetes (T1D), but little is known about changes in intestinal homeostasis that contribute to disease pathogenesis. Here, we analyzed oral tolerance induction, components of the intestinal barrier, fecal microbiota, and immune cell phenotypes in non-obese diabetic (NOD) mice during disease progression compared to non-obese diabetes resistant (NOR) mice. NOD mice failed to develop oral tolerance and had defective protective/regulatory mechanisms in the intestinal mucosa, including de...
Source: Journal of Leukocyte Biology - Category: Hematology Authors: Tags: J Leukoc Biol Source Type: research
Publication date: Available online 27 June 2019Source: Biochimica et Biophysica Acta (BBA) - Molecular Basis of DiseaseAuthor(s): Magdalena Jazurek-Ciesiolka, Justyna Janikiewicz, Pawel Dobrzyn, Anna Dziewulska, Kamil Kozinski, Agnieszka DobrzynAbstractIn the setting of metabolic overload, chronic elevations of free fatty acids in blood and tissues are associated with pancreatic β-cell lipotoxicity and failure. Ultimately, obesity combined with insulin resistance increases the dysfunctional demand of β-cells and contributes to the development of type 2 diabetes. Forkhead box O1 (FoxO1) is a potent transcriptional...
Source: Biochimica et Biophysica Acta (BBA) Molecular Basis of Disease - Category: Molecular Biology Source Type: research
Alessandro Poggi1*, Roberto Benelli2, Roberta Venè1, Delfina Costa1, Nicoletta Ferrari1, Francesca Tosetti1 and Maria Raffaella Zocchi3 1Molecular Oncology and Angiogenesis Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy 2Immunology Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy 3Division of Immunology, Transplantation and Infectious Diseases, IRCCS San Raffaele Scientific Institute, Milan, Italy It is well established that natural killer (NK) cells are involved in both innate and adaptive immunity. Indeed, they can recognize molecules induced at the cell surface by stress signals ...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
Conclusion: ROS promote CD8+ T cell activation by facilitating autoantigen cross-presentation by DCs. ROS scavengers could potentially represent an important component of therapies aiming to disrupt autoantigen presentation and activation of CD8+ T cells in individuals at-risk for developing T1D. In Type 1 Diabetes (T1D), pancreatic β cells are attacked by a T cell mediated autoimmune response and lose their ability to produce insulin (1–3). While a number of immune cell subsets are involved throughout the development of T1D, cytotoxic CD8+ T cells (CTLs) function as primary effectors of β cell damag...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
Conclusion Taken together, evidence from animal and human studies demonstrates that the brain detects levels of circulating nutrients and hormones and consequently organizes an outward response that contributes to the regulation of whole-body glucose homeostasis. However, there are major knowledge gaps about the exact nature of this response and its relative importance compared to peripheral processes. As we have seen, animal studies have provided an anatomical map of CNS glucose regulation and have identified important neurons and neural circuits involved. Additionally, the CNS sensing of key nutrients and hormones has b...
Source: Frontiers in Physiology - Category: Physiology Source Type: research
Ali Mahzari1, Songpei Li1, Xiu Zhou1,2, Dongli Li2, Sherouk Fouda1, Majid Alhomrani1, Wala Alzahrani1, Stephen R. Robinson1 and Ji-Ming Ye1,2* 1Lipid Biology and Metabolic Disease Laboratory, School of Health and Biomedical Sciences, RMIT University, Melbourne, VIC, Australia 2School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, China The present study investigated the effects of matrine on non-alcoholic steatohepatitis (NASH) in mice induced by a methionine choline-deficient (MCD) diet and the mechanism involved. The study was performed in C57B/6J mice fed a MCD diet for 6 weeks to induce NAS...
Source: Frontiers in Pharmacology - Category: Drugs & Pharmacology Source Type: research
CD28 Individual Signaling Up-regulates Human IL-17A Expression by Promoting the Recruitment of RelA/NF-κB and STAT3 Transcription Factors on the Proximal Promoter Martina Kunkl1†, Marta Mastrogiovanni1,2†, Nicla Porciello3, Silvana Caristi1, Emanuele Monteleone4, Stefano Arcieri5 and Loretta Tuosto1* 1Department of Biology and Biotechnology Charles Darwin, Sapienza University, Rome, Italy 2Lymphocyte Cell Biology Unit, INSERM U1221, Department of Immunology, Pasteur Institute, Paris, France 3Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom 4Department of Molecu...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
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