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https://www.readbyqxmd.com/read/28805975/antofine-suppresses-endotoxin-induced-inflammation-and-metabolic-disorder-via-amp-activated-protein-kinase
#1
Shao-Ting Chou, Fang Jung, Shih-Hsing Yang, Hwei-Ling Chou, Guey-Mei Jow, Jau-Chen Lin
The inhibition of activated macrophages has been used to develop anti-inflammatory agents for therapeutic intervention to human diseases that cause excessive inflammatory responses. Antofine, a phenanthroindolizidine alkaloid, has a potent anti-inflammatory effect. However, the molecular mechanisms of its anti-inflammatory activity have not yet been fully detailed. In this study, we comprehensively explored the anti-inflammatory effects of antofine on endotoxin-induced inflammation in macrophages using cDNA microarray analysis, thereby elucidating the potential mechanism by which antofine suppresses inflammation...
August 2017: Pharmacology Research & Perspectives
https://www.readbyqxmd.com/read/28804999/diversity-of-astroglial-responses-across-human-neurodegenerative-disorders-and-brain-aging
#2
Isidro Ferrer
Astrogliopathy refers to alterations of astrocytes occurring in diseases of the nervous system, and it implies the involvement of astrocytes as key elements in the pathogenesis and pathology of diseases and injuries of the central nervous system. Reactive astrocytosis refers to the response of astrocytes to different insults to the nervous system, whereas astrocytopathy indicates hypertrophy, atrophy/degeneration and loss of function and pathological remodeling occurring as a primary cause of a disease or as a factor contributing to the development and progression of a particular disease...
September 2017: Brain Pathology
https://www.readbyqxmd.com/read/28804981/lipopolysaccharide-inhibits-hepatic-gluconeogenesis-in-rats-the-role-of-immune-cells
#3
Hiroshi Tanaka, Yoshikazu Nishikawa, Toru Fukushima, Ataru Taniguchi, Yoshihito Fujita, Kinsuke Tsuda, Nobuya Inagaki, Masaya Hosokawa
AIMS/INTRODUCTION: Bacterial septicemia has diverse clinical symptoms including severe hypoglycemia. However, sepsis-induced hypoglycemia has not yet been examined in detail. The aim of the present study is to investigate the mechanisms underlying hypoglycemia in sepsis. MATERIALS AND METHODS: We induced endotoxin shock in rats using lipopolysaccharide (LPS). After an intraperitoneal injection of LPS, we measured gluconeogenesis using the pyruvate tolerance test (PTT)...
August 14, 2017: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/28804621/development-of-gene-polymorphisms-in-meditators-of-nonalcoholic-fatty-liver-disease
#4
Chun Wang, Jianping Gong, Hao Wu
Nonalcoholic fatty liver disease (NAFLD) is the most prevalent liver disease worldwide, the morbidity of which closely correlates with diversity of ethnicity, minority, family and location. Its histology spans from simple steatosis, to nonalcoholic steatohepatitis, which ultimately results in fibrosis, cirrhosis and hepatocellular carcinoma. The accelerating prevalence of NAFLD is due to an incremental incidence of metabolic syndrome that is distinguished by dyslipidemia, glucose impairment, obesity, excessive oxidative stress and adipocytokine impairment...
August 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28802226/taraxerol-a-pentacyclic-triterpenoid-from-abroma-augusta-leaf-attenuates-diabetic-nephropathy-in-type-2-diabetic-rats
#5
Ritu Khanra, Niloy Bhattacharjee, Tarun K Dua, Ashis Nandy, Achintya Saha, Jatin Kalita, Prasenjit Manna, Saikat Dewanjee
Persistent hyperglycaemia coupled with inflammation plays an important role in the pathogenesis of diabetic nephropathy (DN). Present study examined the therapeutic potential of taraxerol isolated from the methanol extract of Abroma augusta leaf against DN using rodent model of type 2 diabetes (T2D). T2D was experimentally induced by high fat diet and a single low-single dose of streptozotocin (35mg/kg, i.p.). Accumulation of serum creatinine, urea, and uric acid, activation of lactate dehydrogenase and creatinin kinase, and release of urinary albumin represented the glomerular damage and the progression of nephropathy in T2D rats...
August 9, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28801380/vitamin-d-and-immunomodulation-is-it-time-to-change-the-reference-values
#6
Giulia Bivona, Luisa Agnello, Marcello Ciaccio
The term "vitamin D" refers to two chemical compounds - ergosterol, or vitamin D2, and cholecalciferol, or vitamin D3. Active vitamin D3 is correctly regarded as a neurohormone due to its pleiotropic biological activities. Although the relation between vitamin D and calcium-phosphorus metabolism has never been discussed, the knowledge on many other roles vitamin D plays is growing fast. Briefly, vitamin D immunomodulation includes attenuation and stimulation of Th1 and Th2 cell proliferation, respectively. Similarly, vitamin D can induce or inhibit the synthesis, secretion, and release of anti- inflammatory (IL-4 and IL-10) and pro-inflammatory (IL-1, TNF-α, IFN-γ) cytokines, respectively...
August 2017: Annals of Clinical and Laboratory Science
https://www.readbyqxmd.com/read/28801262/the-physiological-and-pathophysiological-roles-of-taurine-in-adipose-tissue-in-relation-to-obesity
#7
REVIEW
Shigeru Murakami
Obesity is caused by an imbalance between energy intake and energy expenditure. It is established that obesity is a state of low-grade chronic inflammation, which is characterized by enlarged hypertrophied adipocytes, increased infiltration by macrophages and marked changes in the secretion of adipokines and free fatty acids. The effects of taurine on the pathogenesis of obesity have been reported in animals and humans. Although the mechanisms underlying the anti-obesity action of taurine remain to be defined, taurine seems to ameliorate obesity through stimulation of energy expenditure, modulation of lipid metabolism, anorexic effect, anti-inflammatory and anti-oxidative effects...
August 8, 2017: Life Sciences
https://www.readbyqxmd.com/read/28798743/l-arginine-uptake-by-cationic-amino-acid-transporter-promotes-intra-macrophage-survival-of-leishmania-donovani-by-enhancing-arginase-mediated-polyamine-synthesis
#8
Abhishek Mandal, Sushmita Das, Ajay Kumar, Saptarshi Roy, Sudha Verma, Ayan Kumar Ghosh, Ruby Singh, Kumar Abhishek, Savita Saini, Abul Hasan Sardar, Bidyut Purkait, Ashish Kumar, Chitra Mandal, Pradeep Das
The survival of intracellular protozoan parasite, Leishmania donovani, the causative agent of Indian visceral leishmaniasis (VL), depends on the activation status of macrophages. l-Arginine, a semi-essential amino acid plays a crucial regulatory role for activation of macrophages. However, the role of l-arginine transport in VL still remains elusive. In this study, we demonstrated that intra-macrophage survival of L. donovani depends on the availability of extracellular l-arginine. Infection of THP-1-derived macrophage/human monocyte-derived macrophage (hMDM) with Leishmania, resulted in upregulation of l-arginine transport...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28798194/hyperglycemia-does-not-affect-antigen-specific-activation-and-cytolytic-killing-by-cd8-t-cells-in-vivo
#9
Asha Recino, Kerry Barkan, Graham Ladds, Anne Cooke, F Susan Wong, Maja Wallberg
Metabolism is of central importance to T cell survival and differentiation. It is well known that T cells cannot function in the absence of glucose, but it is less clear how they respond to excessive levels of glucose. In this study we investigated how increasing levels of glucose affect T cell-mediated immune responses. We examined the effects of increased levels of glucose on CD8(+) T cell behaviour in vitro by assessing activation and cytokine production, as well as oxygen consumption rate, extracellular acidification rate and intracellular signalling...
August 10, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28798136/adipose-tissue-metabolic-and-inflammatory-responses-to-stroke-are-altered-in-obese-mice
#10
Michael J Haley, Graham Mullard, Katherine A Hollywood, Garth J Cooper, Warwick B Dunn, Catherine B Lawrence
Obesity is an independent risk factor for stroke, though several clinical studies have reported that obesity improves stroke outcome. Obesity is hypothesised to aid recovery by protecting against post-stroke catabolism. We therefore assessed whether obese mice had an altered metabolic and inflammatory response to stroke. Obese ob/ob mice underwent 20 min middle cerebral artery occlusion and 24 h reperfusion. Lipid metabolism and expression of inflammatory cytokines were assessed in the plasma, liver and adipose tissue...
August 10, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28797733/propagation-of-respiratory-viruses-in-human-airway-epithelia-reveals-persistent-virus-specific-signatures
#11
Manel Essaidi-Laziosi, Francisco Brito, Sacha Benaoudia, Léna Royston, Valeria Cagno, Mélanie Fernandes-Rocha, Isabelle Piuz, Evgeny Zdobnov, Song Huang, Samuel Constant, Marc-Olivier Boldi, Laurent Kaiser, Caroline Tapparel
BACKGROUND: Leading etiologies of acute illnesses, respiratory viruses typically cause self-limited diseases, though severe complications can occur in fragile patients. Rhinoviruses, respiratory enteroviruses, influenza virus, respiratory syncytial viruses and coronaviruses are highly prevalent respiratory pathogens, but due to the lack of reliable animal models, their differential pathogenesis remains poorly characterized. OBJECTIVE: To compare infections by respiratory viruses isolated from clinical specimens using reconstituted human airway epithelia...
August 7, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28795970/machine-learning-based-gene-prioritization-identifies-novel-candidate-risk-genes-for-inflammatory-bowel-disease
#12
Ofer Isakov, Iris Dotan, Shay Ben-Shachar
BACKGROUND: The inflammatory bowel diseases (IBDs) are chronic inflammatory disorders, associated with genetic, immunologic, and environmental factors. Although hundreds of genes are implicated in IBD etiology, it is likely that additional genes play a role in the disease process. We developed a machine learning-based gene prioritization method to identify novel IBD-risk genes. METHODS: Known IBD genes were collected from genome-wide association studies and annotated with expression and pathway information...
August 8, 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28794644/the-rank-rankl-opg-system-in-tumorigenesis-and-metastasis-of-cancer-stem-cell-potential-targets-for-anticancer-therapy
#13
REVIEW
Mekonnen Sisay, Getnet Mengistu, Dumessa Edessa
The molecular triad involving receptor activator of nuclear factor kβ (RANK)/RANK ligand (RANKL)/osteoprotegerin cytokine system has been well implicated in several physiological and pathological processes including bone metabolism, mammary gland development, regulation of the immune function, tumorigenesis and metastasis of cancer stem cell, thermoregulation, and vascular calcification. However, this review aimed to summarize several original and up-to-date articles focusing on the role of this signaling system in cancer cell development and metastasis as well as potential therapeutic agents targeting any of the three tumor necrotic factor super family proteins and/or their downstream signaling pathways...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28794498/analysis-of-inflammatory-cytokine-and-tlr-expression-levels-in-type-2-diabetes-with-complications
#14
Saket Gupta, Ashwini Maratha, Jakub Siednienko, Anandan Natarajan, Thusitha Gajanayake, Shu Hoashi, Sinéad Miggin
The pathogenesis and complications of type 2 diabetes (T2DM) are closely linked with defective glucose metabolism, obesity, cardiovascular disease and an inability to mount an effective immune response to certain pathogenic organisms. Perturbations in key innate immune receptors known as Toll-like receptors (TLRs) and inflammatory mediators such as IL-6, TNFα and IL-1β have been linked with T2DM. Herein, we sought to establish whether patients with T2DM and underlying complications exhibit perturbations in cytokine and TLR expression...
August 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28794431/macrophage-jak2-deficiency-protects-against-high-fat-diet-induced-inflammation
#15
Harsh R Desai, Tharini Sivasubramaniyam, Xavier S Revelo, Stephanie A Schroer, Cynthia T Luk, Prashanth R Rikkala, Adam H Metherel, David W Dodington, Yoo Jin Park, Min Jeong Kim, Joshua A Rapps, Rickvinder Besla, Clinton S Robbins, Kay-Uwe Wagner, Richard P Bazinet, Daniel A Winer, Minna Woo
During obesity, macrophages can infiltrate metabolic tissues, and contribute to chronic low-grade inflammation, and mediate insulin resistance and diabetes. Recent studies have elucidated the metabolic role of JAK2, a key mediator downstream of various cytokines and growth factors. Our study addresses the essential role of macrophage JAK2 in the pathogenesis to obesity-associated inflammation and insulin resistance. During high-fat diet (HFD) feeding, macrophage-specific JAK2 knockout (M-JAK2(-/-)) mice gained less body weight compared to wildtype littermate control (M-JAK2(+/+)) mice and were protected from HFD-induced systemic insulin resistance...
August 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28792474/the-effects-of-selective-hematopoietic-expression-of-human-il-37-on-systemic-inflammation-and-atherosclerosis-in-ldlr-deficient-mice
#16
Geerte Hoeke, P Padmini S J Khedoe, Janna A van Diepen, Karin Pike-Overzet, Britt van de Ven, Nadia Vazirpanah, Isabel Mol, Pieter S Hiemstra, Frank J T Staal, Rinke Stienstra, Mihai G Netea, Charles A Dinarello, Patrick C N Rensen, Jimmy F P Berbée
The human cytokine interleukin (IL)-37 has potent anti-inflammatory capacities, and hematopoietic cell-specific transgenic overexpression of IL-37 in mice protects against septic shock and colitis. In the present study we investigated the effect of hematopoietic expression of IL-37 on atherosclerosis development under low-grade inflammatory conditions. Low-density lipoprotein receptor (LDLr)-deficient mice were lethally irradiated and transplanted with bone marrow from IL-37-transgenic or control wild-type mice and fed a Western-type diet (WTD; 1% cholesterol) for eight weeks...
August 9, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28791439/metabolic-crosstalk-between-fatty-pancreas-and-fatty-liver-effects-on-local-inflammation-and-insulin-secretion
#17
Felicia Gerst, Robert Wagner, Gabriele Kaiser, Madhura Panse, Martin Heni, Jürgen Machann, Malte N Bongers, Tina Sartorius, Bence Sipos, Falko Fend, Christian Thiel, Silvio Nadalin, Alfred Königsrainer, Norbert Stefan, Andreas Fritsche, Hans-Ulrich Häring, Susanne Ullrich, Dorothea Siegel-Axel
AIMS/HYPOTHESIS: Obesity-linked ectopic fat accumulation is associated with the development of type 2 diabetes. Whether pancreatic and liver steatosis impairs insulin secretion is controversial. We examined the crosstalk of human pancreatic fat cells with islets and the role of diabetogenic factors, i.e. palmitate and fetuin-A, a hepatokine released from fatty liver. METHODS: Human pancreatic resections were immunohistochemically stained for insulin, glucagon, somatostatin and the macrophage/monocyte marker CD68...
August 8, 2017: Diabetologia
https://www.readbyqxmd.com/read/28791256/in-vivo-host-pathogen-interaction-as-revealed-by-global-proteomic-profiling-of-zebrafish-larvae
#18
Francisco Díaz-Pascual, Javiera Ortíz-Severín, Macarena A Varas, Miguel L Allende, Francisco P Chávez
The outcome of a host-pathogen interaction is determined by the conditions of the host, the pathogen, and the environment. Although numerous proteomic studies of in vitro-grown microbial pathogens have been performed, in vivo proteomic approaches are still rare. In addition, increasing evidence supports that in vitro studies inadequately reflect in vivo conditions. Choosing the proper host is essential to detect the expression of proteins from the pathogen in vivo. Numerous studies have demonstrated the suitability of zebrafish (Danio rerio) embryos as a model to in vivo studies of Pseudomonas aeruginosa infection...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28791021/reconstitution-of-t-cell-proliferation-under-arginine-limitation-activated-human-t-cells-take-up-citrulline-via-l-type-amino-acid-transporter-1-and-use-it-to-regenerate-arginine-after-induction-of-argininosuccinate-synthase-expression
#19
Anke Werner, Miriam Koschke, Nadine Leuchtner, Claudia Luckner-Minden, Alice Habermeier, Johanna Rupp, Christin Heinrich, Roland Conradi, Ellen I Closs, Markus Munder
In the tumor microenvironment, arginine is metabolized by arginase-expressing myeloid cells. This arginine depletion profoundly inhibits T cell functions and is crucially involved in tumor-induced immunosuppression. Reconstitution of adaptive immune functions in the context of arginase-mediated tumor immune escape is a promising therapeutic strategy to boost the immunological antitumor response. Arginine can be recycled in certain mammalian tissues from citrulline via argininosuccinate (ASA) in a two-step enzymatic process involving the enzymes argininosuccinate synthase (ASS) and argininosuccinate lyase (ASL)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28791008/free-fatty-acids-profiles-are-related-to-gut-microbiota-signatures-and-short-chain-fatty-acids
#20
Javier Rodríguez-Carrio, Nuria Salazar, Abelardo Margolles, Sonia González, Miguel Gueimonde, Clara G de Los Reyes-Gavilán, Ana Suárez
A growing body of evidence highlights the relevance of free fatty acids (FFA) for human health, and their role in the cross talk between the metabolic status and immune system. Altered serum FFA profiles are related to several metabolic conditions, although the underlying mechanisms remain unclear. Recent studies have highlighted the link between gut microbiota and host metabolism. However, although most of the studies have focused on different clinical conditions, evidence on the role of these mediators in healthy populations is lacking...
2017: Frontiers in Immunology
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