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https://www.readbyqxmd.com/read/28542832/integrated-transcriptomic-and-metabolomic-analysis-reveals-adaptive-changes-of-hibernating-retinas
#1
Yizhao Luan, Jingxing Ou, Vincent P Kunze, Fengyu Qiao, Yan Wang, Lai Wei, Wei Li, Zhi Xie
Hibernation is a seasonally adaptive strategy that allows hibernators to live through extremely cold conditions. Despite the profound reduction of blood flow to the retinas, hibernation causes no lasting retinal injury. Instead, hibernators show an increased tolerance to ischemic insults during the hibernation period. To understand the molecular changes of the retinas in response to hibernation, we applied an integrative transcriptome and metabolome analysis to explore changes in gene expression and metabolites of 13-lined ground squirrel retinas during hibernation...
May 25, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28539682/the-human-body-as-an-energetic-hybrid-new-perspectives-for-chronic-disease-treatment
#2
REVIEW
Michał Gajewski, Przemysław Rzodkiewicz, Sławomir Maśliński
Inflammatory response is accompanied by changes in cellular energy metabolism. Proinflammatory mediators like plasma C-reactive protein, IL-6, plasminogen activator inhibitor-1, TNF-α or monocyte chemoattractant protein-1 released in the site of inflammation activates immune cells and increase energy consumption. Increased demand for energy creates local hypoxia and lead in consequence to mitochondrial dysfunction. Metabolism of cells is switched to anaerobic glycolysis. Mitochondria continuously generate free radicals that what result in imbalance that causes oxidative stress, which results in oxidative damage...
2017: Reumatologia
https://www.readbyqxmd.com/read/28539549/the-metabolic-regulation-in-immune-cells-and-pathogenesis-of-systemic-lupus-erythematosus-%C3%A2-toward-new-therapeutic-applications%C3%A2
#3
Yusuke Takeshima, Yukiko Iwasaki, Tomohisa Okamura, Keishi Fujio, Kazuhiko Yamamoto
  The importance of cellular metabolism has long been known as Warburg effect; cancer cells are characterized by mitochondrial defect that shifts towards aerobic glycolysis. Recently, many reports have revealed that immune metabolism is a key factor for controlling immune cell proliferation and differentiation. Resting lymphocytes generate energy through oxidative phosphorylation and fatty acid oxidation, whereas activated lymphocytes rapidly shift to glycolysis. Especially in T cells, more precise mechanism of regulating metabolism have been clarified on differentiation from naïve T cells to effector T cells...
2017: Nihon Rinshō Men'eki Gakkai Kaishi, Japanese Journal of Clinical Immunology
https://www.readbyqxmd.com/read/28539244/manganese-exposure-induces-neuroinflammation-by-impairing-mitochondrial-dynamics-in-astrocytes
#4
Souvarish Sarkar, Emir Malovic, Dilshan S Harischandra, Hilary A Ngwa, Anamitra Ghosh, Colleen Hogan, Dharmin Rokad, Gary Zenitsky, Huajun Jin, Vellareddy Anantharam, Anumantha G Kanthasamy, Arthi Kanthasamy
Chronic manganese (Mn) exposure induces neurotoxicity, which is characterized by Parkinsonian symptoms resulting from impairment in the extrapyramidal motor system of the basal ganglia. Mitochondrial dysfunction and oxidative stress are considered key pathophysiological features of Mn neurotoxicity. Recent evidence suggests astrocytes as a major target of Mn neurotoxicity since Mn accumulates predominantly in astrocytes. However, the primary mechanisms underlying Mn-induced astroglial dysfunction and its role in metal neurotoxicity are not completely understood...
May 21, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28538737/lymphatic-endothelial-s1p-promotes-mitochondrial-function-and-survival-in-naive-t-cells
#5
Alejandra Mendoza, Victoria Fang, Cynthia Chen, Madhavika Serasinghe, Akanksha Verma, James Muller, V Sai Chaluvadi, Michael L Dustin, Timothy Hla, Olivier Elemento, Jerry E Chipuk, Susan R Schwab
Effective adaptive immune responses require a large repertoire of naive T cells that migrate throughout the body, rapidly identifying almost any foreign peptide. Because the production of T cells declines with age, naive T cells must be long-lived. However, it remains unclear how naive T cells survive for years while constantly travelling. The chemoattractant sphingosine 1-phosphate (S1P) guides T cell circulation among secondary lymphoid organs, including spleen, lymph nodes and Peyer's patches, where T cells search for antigens...
May 24, 2017: Nature
https://www.readbyqxmd.com/read/28538669/the-peroxisome-mitochondria-connection-how-and-why
#6
REVIEW
Marc Fransen, Celien Lismont, Paul Walton
Over the past decades, peroxisomes have emerged as key regulators in overall cellular lipid and reactive oxygen species metabolism. In mammals, these organelles have also been recognized as important hubs in redox-, lipid-, inflammatory-, and innate immune-signaling networks. To exert these activities, peroxisomes must interact both functionally and physically with other cell organelles. This review provides a comprehensive look of what is currently known about the interconnectivity between peroxisomes and mitochondria within mammalian cells...
May 24, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28534038/analysis-of-mitochondrial-transfer-in-direct-co-cultures-of-human-monocyte-derived-macrophages-mdm-and-mesenchymal-stem-cells-msc
#7
Megan V Jackson, Anna D Krasnodembskaya
Mesenchymal stem/stromal cells (MSC) are adult stem cells which have been shown to improve survival, enhance bacterial clearance and alleviate inflammation in pre-clinical models of acute respiratory distress syndrome (ARDS) and sepsis. These diseases are characterised by uncontrolled inflammation often underpinned by bacterial infection. The mechanisms of MSC immunomodulatory effects are not fully understood yet. We sought to investigate MSC cell contact-dependent communication with alveolar macrophages (AM), professional phagocytes which play an important role in the lung inflammatory responses and anti-bacterial defence...
May 5, 2017: Bio-protocol
https://www.readbyqxmd.com/read/28533780/innate-immune-function-of-mitochondrial-metabolism
#8
REVIEW
David Sancho, Michel Enamorado, Johan Garaude
Sensing of microbe-associated molecular patterns or danger signals by innate immune receptors drives a complex exchange of information. Innate receptor signaling not only triggers transcriptional events but also induces profound changes in metabolic fluxes, redox balance, and metabolite abundance thereby influencing immune cell function. Mitochondria are at the core of metabolic adaptation to the changing environment. The close interaction between mitochondrial metabolism and immune signaling has emerged as a central regulator of innate sensing...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28532835/effect-of-cholesterol-loaded-cyclodextrin-supplementation-on-tyrosine-phosphorylation-and-apoptosis-like-changes-in-frozen-thawed-hariana-bull-spermatozoa
#9
Hanuman P Yadav, Anuj Kumar, Nadeem Shah, Dharmendra S Chauhan, Atul Saxena, Sarvajeet Yadav, Dilip Kumar Swain
The beneficial effects of cholesterol loaded cyclodextrin (CLC) addition were evaluated in cryopreserved bull semen. Forty ejaculates were collected from Hariana bulls (n = 4), pooled and divided into 4 aliquots. All the aliquots were initially diluted in to egg yolk tris citrate and supplemented with CLC @ 0.5 mg (Group-II), 1.0 mg (G-III) and 2.0 mg (G-IV) CLC/120 × 10(6) spermatozoa or without CLC (G-I) that served as control. Extended semen was cryopreserved at -196 °C for 24 h. Seminal attributes like motility, viability, cryocapacitation like changes, tyrosine phosphorylation, apoptosis like changes in terms of mitochondrial transmembrane potential and DNA integrity were evaluated after equilibration and thawing...
July 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28527664/a-new-hdv-mouse-model-identifies-mitochondrial-antiviral-signaling-protein-mavs-as-a-key-player-in-ifn-%C3%AE-induction
#10
Lester Suárez-Amarán, Carla Usai, Marianna Di Scala, Cristina Godoy, Yi Ni, Mirja Hommel, Laura Palomo, Víctor Segura, Cristina Olagüe, Africa Vales, Alicia Ruiz-Ripa, Maria Buti, Eduardo Salido, Jesús Prieto, Stephan Urban, Francisco Rodríguez-Frias, Rafael Aldabe, Gloria González-Aseguinolaza
BACKGROUND & AIMS: Studying hepatitis delta virus (HDV) and developing new treatments is hampered by the limited availability of small animal models. Here a description of a robust mouse model of HDV infection that mimics several important characteristics of the human disease is presented. METHODS: HDV- and HBV-replication competent genomes were delivered to the mouse liver using adeno-associated viruses (AAV) (AAV-HDV and AAV-HBV). Viral load, antigen expression and genomes were quantified at different time points after AAV injection...
May 17, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28525970/the-immunoregulatory-role-of-alpha-enolase-in-dendritic-cell-function-during-chlamydia-infection
#11
Khamia Ryans, Yusuf Omosun, Danielle N McKeithen, Tankya Simoneaux, Camilla C Mills, Nathan Bowen, Francis O Eko, Carolyn M Black, Joseph U Igietseme, Qing He
BACKGROUND: We have previously reported that interleukin-10 (IL-10) deficient dendritic cells (DCs) are potent antigen presenting cells that induced elevated protective immunity against Chlamydia. To further investigate the molecular and biochemical mechanism underlying the superior immunostimulatory property of IL-10 deficient DCs we performed proteomic analysis on protein profiles from Chlamydia-pulsed wild-type (WT) and IL-10(-/-) DCs to identify differentially expressed proteins with immunomodulatory properties...
May 19, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28525893/rat-embryonic-fibroblasts-immortalized-by-mrps18-2-protein-are-target-for-nk-cells
#12
Muhammad Mushtaq, Pradeepa N Pangigadde, Suhas Darekar, Erik Dissen, Elena Kashuba
Overexpression of the human mitochondrial ribosomal protein MRPS18-2 (S18-2) led to immortalization of primary rat embryonic fibroblasts (REFs). The derived cells (18IM) expressed embryonic stem cell markers. Noteworthy, genes encoding the COX family proteins were up-regulated significantly. It is known that the COX family proteins are involved in the regulation of immune response.In the present work we demonstrate that 18IM cells behave like stem cells when subjected to directed differentiation in vitro. However, unlike stem cells, 18IM cells do not develop tumors in vivo, in SCID mice...
May 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28523551/epigenetic-mechanisms-of-gene-regulation-in-amyotrophic-lateral-sclerosis
#13
Alba Jimenez-Pacheco, Jaime M Franco, Soledad Lopez, Juan Miguel Gomez-Zumaquero, Maria Magdalena Leal-Lasarte, Diana E Caballero-Hernandez, Marta Cejudo-Guillén, David Pozo
Despite being clinically described 150 years ago, the mechanisms underlying amyotrophic lateral sclerosis (ALS) pathogenesis have not yet been fully understood. Studies in both animal models of ALS and human patients reveal a plethora of alterations such as increased glutamate-mediated excitotoxicity, redox stress, increased apoptosis, defective axonal transport, protein-misfolding events, mitochondrial impairment and sustained unregulated immune responses. Regardless of being sporadic or familiar ALS, the final outcome at the cellular level is the death of upper and lower motor neurons, and once diagnosed, ALS is typically lethal within the next 5 years...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28520694/metabolic-inflammatory-complex-in-sepsis-septic-cachexia-as-a-novel-potential-therapeutic-target
#14
Masao Kaneki
Despite several decades of focused investigation, sepsis remains a major cause of mortality in critically ill patients. Advancements in intensive care have enabled more patients to survive the acute phase of sepsis than previously, but a growing number of them progress to chronic critical illness. The failure of previous randomized clinical trials of anti-inflammatory agents to show any pro-survival benefit in septic patients underscores current thought that simple anti-inflammatory strategies are ineffective because the inhibitory effect of anti-inflammatory agents undermines the immune response to pathogens...
May 17, 2017: Shock
https://www.readbyqxmd.com/read/28515690/brain-renin-angiotensin-system-and-microglial-polarization-implications-for-aging-and-neurodegeneration
#15
REVIEW
Jose L Labandeira-Garcia, Ana I Rodríguez-Perez, Pablo Garrido-Gil, Jannette Rodriguez-Pallares, Jose L Lanciego, Maria J Guerra
Microglia can transform into proinflammatory/classically activated (M1) or anti-inflammatory/alternatively activated (M2) phenotypes following environmental signals related to physiological conditions or brain lesions. An adequate transition from the M1 (proinflammatory) to M2 (immunoregulatory) phenotype is necessary to counteract brain damage. Several factors involved in microglial polarization have already been identified. However, the effects of the brain renin-angiotensin system (RAS) on microglial polarization are less known...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28514731/antagonistic-effects-of-selenium-on-cadmium-induced-apoptosis-by-restoring-the-mitochondrial-dynamic-equilibrium-and-energy-metabolism-in-chicken-spleens
#16
Zhe Xu, Xi Jin, Tingru Pan, Tianqi Liu, Na Wan, Shu Li
The aim of this study was to investigate the mechanism of cadmium-induced apoptosis in chicken spleens and the antagonistic effects of selenium. We duplicated the selenium-cadmium interaction model and examined the expression of apoptosis-, immune-, mitochondrial dynamics- and energy metabolism-related genes. The results demonstrated that after treatment with cadmium, the frequency of apoptosis was significantly increased, and the morphological characteristics of apoptosis were observed. The expression of pro-apoptotic genes was increased, and that of anti-apoptotic genes was decreased...
April 30, 2017: Oncotarget
https://www.readbyqxmd.com/read/28511345/ros-homeostasis-a-key-determinant-in-liver-ischemic-preconditioning
#17
Ignacio Prieto, María Monsalve
Reactive Oxygen Species (ROS) are key mediators of ischemia-reperfusion injury but also required for the induction of the stress response that limits tissue injury and underlies the protection provided by ischemic-preconditioning protocols. Liver steatosis is an important risk factor for liver transplant failure. Liver steatosis is associated with mitochondrial dysfunction and excessive mitochondrial ROS production. Studies aiming at decreasing the sensibility of the steatotic liver to ischemia-reperfusion injury using pre-conditioning protocols, have shown that the steatotic liver has a reduced capacity to respond to these protocols...
May 4, 2017: Redox Biology
https://www.readbyqxmd.com/read/28508193/neutrophil-depletion-improves-diet-induced-non-alcoholic-fatty-liver-disease-in-mice
#18
Rongying Ou, Jia Liu, Mingfen Lv, Jingying Wang, Jinmeng Wang, Li Zhu, Liang Zhao, Yunsheng Xu
PURPOSE: Non-alcoholic fatty liver disease is highly associated with morbidity and mortality in population. Although studies have already demonstrated that the immune response plays a pivotal role in the development of non-alcoholic fatty liver disease, the comprehensive regulation is unclear. Therefore, present study was carried out to investigate the non-alcoholic fatty liver disease development under neutrophil depletion. METHODS: To achieve the aim of the study, C57BL/6 J mice were fed with high fat diet for 6 weeks before treated with neutrophil deplete antibody 1A8 or isotype control (200 μg/ mouse every week) for another 4 weeks...
April 6, 2017: Endocrine
https://www.readbyqxmd.com/read/28508153/cellular-and-molecular-perspectives-in-rheumatoid-arthritis
#19
REVIEW
Douglas J Veale, Carl Orr, Ursula Fearon
Synovial immunopathology in rheumatoid arthritis is complex involving both resident and infiltrating cells. The synovial tissue undergoes significant neovascularization, facilitating an influx of lymphocytes and monocytes that transform a typically acellular loose areolar membrane into an invasive tumour-like pannus. The microvasculature proliferates to form straight regularly-branching vessels; however, they are highly dysfunctional resulting in reduced oxygen supply and a hypoxic microenvironment. Autoantibodies such as rheumatoid factor and anti-citrullinated protein antibodies are found at an early stage, often before arthritis has developed, and they have been implicated in the pathogenesis of RA...
May 15, 2017: Seminars in Immunopathology
https://www.readbyqxmd.com/read/28507507/pink1-parkin-dependent-mitochondrial-surveillance-from-pleiotropy-to-parkinson-s-disease
#20
REVIEW
Francois Mouton-Liger, Maxime Jacoupy, Jean-Christophe Corvol, Olga Corti
Parkinson's disease (PD) is one of the most frequent neurodegenerative disease caused by the preferential, progressive degeneration of the dopaminergic (DA) neurons of the substantia nigra (SN) pars compacta. PD is characterized by a multifaceted pathological process involving protein misfolding, mitochondrial dysfunction, neuroinflammation and metabolism deregulation. The molecular mechanisms governing the complex interplay between the different facets of this process are still unknown. PARK2/Parkin and PARK6/PINK1, two genes responsible for familial forms of PD, act as a ubiquitous core signaling pathway, coupling mitochondrial stress to mitochondrial surveillance, by regulating mitochondrial dynamics, the removal of damaged mitochondrial components by mitochondria-derived vesicles, mitophagy, and mitochondrial biogenesis...
2017: Frontiers in Molecular Neuroscience
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