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Ethyl pyruvate

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https://www.readbyqxmd.com/read/29102048/ethyl-pyruvate-reduces-acute-lung-damage-following-trauma-and-hemorrhagic-shock-via-inhibition-of-nf-%C3%AE%C2%BAb-and-hmgb1
#1
Borna Relja, Nils Wagner, Niklas Franz, Scott Dieteren, Katharina Mörs, Julia Schmidt, Ingo Marzi, Mario Perl
OBJECTIVE: After blunt thoracic trauma (TxT) and hemorrhagic shock with resuscitation (H/R) intense local inflammatory response and cell loss frequently impair the pulmonary function. Ethyl pyruvate (EP) has been reported to improve the pathophysiologic derangements in models of acute inflammation. Here, we studied the effects of EP on inflammation and lung damage after TxT+H/R. METHODS: Twenty four female Lewis rats (180-240g) were randomly divided into 3 groups: two groups underwent TxT followed by hemorrhagic shock (35±3mmHg) for 60min and resuscitation with either Ringers-Lactat (RL) alone or RL supplemented with EP (EP, 50mg/kg)...
October 16, 2017: Immunobiology
https://www.readbyqxmd.com/read/28987932/ethyl-pyruvate-ameliorates-inflammatory-arthritis-in-mice
#2
Seung Min Jung, Jaeseon Lee, Seung Ye Baek, Juhyun Lee, Se Gwang Jang, Seung-Min Hong, Jin-Sil Park, Mi-La Cho, Sung-Hwan Park, Seung-Ki Kwok
OBJECTIVES: Ethyl pyruvate (EP) is the ethyl ester of pyruvate and has antioxidative and anti-inflammatory effects. This study aimed to evaluate the therapeutic effect of EP in inflammatory arthritis and to identify the underlying mechanisms. METHODS: Mice with collagen-induced arthritis (CIA) were treated with the vehicle control or EP at 20mg/kg, and clinical and histological analyses were performed on the animals. The differentiation of murine CD4+ T cells into T helper 17 (Th17) cells in the presence of EP was investigated in vitro...
November 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28965011/anti-encephalitogenic-effects-of-ethyl-pyruvate-are-reflected-in-the-central-nervous-system-and-the-gut
#3
Neda Djedović, Suzana Stanisavljevic, Bojan Jevtić, Miljana Momčilović, Irena Lavrnja, Djordje Miljković
Ethyl pyruvate is a redox analogue of dimethyl fumarate (Tecfidera), a drug for multiple sclerosis treatment. We have recently shown that ethyl pyruvate ameliorates experimental autoimmune encephalomyelitis (EAE), an animal model of multiple sclerosis. It affects encephalitogenic T cells and macrophages in vitro, as well as in lymph nodes draining the site of encephalitogenic immunization and within the central nervous system (CNS). Here, in vivo effects of ethyl pyruvate on EAE are thoroughly investigated in the CNS and within the gut associated lymphoid tissue...
September 28, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28962159/antioxidant-and-anti-inflammatory-activities-of-ethyl-acetate-extract-of-gynura-formosana-kitam-leaves
#4
Jingfan Ma, Chang Guo, Yinlai Pan, Danyan Lin, Longxin Qiu, Longping Wen
Gynura formosana Kitam (family Compositae) has traditionally been used for the prevention of diabetes, cancer and inflammation in China. However, there are few reports of its anti-inflammatory effects. In the present study, after assessing the in vitro antioxidant activities of extracts from Gynura formosana Kitam leaves, the anti-inflammatory and antioxidant activities of ethyl acetate extract of Gynura formosana Kitam leaves (EAEG) were further investigated in rats using a cotton pellet-induced model of granuloma...
September 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28956808/poly-lactic-acid-blends-with-poly-trimethylene-carbonate-as-biodegradable-medical-adhesive-material
#5
Shuang Zhang, Hongli Li, Mingwei Yuan, Minglong Yuan, Haiyun Chen
A novel medical adhesive was prepared by blending poly(lactic acid) (PLA) with poly(trimethylene carbonate) (PTMC) in ethyl acetate, and the two materials were proven to be biodegradable and biocompatible. The medical adhesive was characterized by ¹H nuclear magnetic resonance (¹HNMR), gel permeation chromatography (GPC), scanning electron microscopy (SEM) and differential scanning calorimetry (DSC). The water vapor transmission rate (WVTR) of this material was measured to be 7.13 g·cm(-2)·24 h(-1). Its degree of comfortability was confirmed by the extensibility (E) and the permanent set (PS), which were approximately 7...
September 28, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28894846/trypsinogen-activation-peptide-induces-hmgb1-release-from-rat-pancreatic-acinar-cells
#6
Guoliang Wang, Yan Liu, Danhua Dui, Liang Bai, Yao Liu, Fei Tian, Wei Wei
BACKGROUND: The development of acute pancreatitis (AP) is associated with intracellular events in pancreatic cells, as well as with early and late inflammatory responses; however, their underlying mechanisms remain unclear. This study investigated trypsinogen activation peptide (TAP)-induced release of high mobility group box-l (HMGB1) from pancreatic acinar cells and how ethyl pyruvate (EP) affects this release. METHODOLOGY: Pancreatic acinar cells from Sprague Dawley rats were divided into control, TAP (administered TAP), and EP (administered TAP and EP) groups...
2017: Open Medicine (Warsaw, Poland)
https://www.readbyqxmd.com/read/28885840/chemical-synthesis-of-rp-and-sp-16-o-17-o-18-o-phosphoenol-pyruvate
#7
Petra Malová Križková, Susanne Prechelmacher, Alexander Roller, Friedrich Hammerschmidt
Enzymes and chirality are intimately associated. For their mechanisms to be studied, chiral substrates are needed as probes. Here, we report a concise synthesis of (RP)- and (SP)-[(16)O,(17)O,(18)O]phosphoenol pyruvate starting from enantiomerically pure (R)-2-chloro-1-phenylethanol, which was transformed into (18)O-labeled 3-methyl-1-phenylbutane-1,3-diol. The diol was reacted with tris(dimethylamino)phosphane and consecutively with H2(17)O to yield a mixture of cyclic H-phosphonates labeled with (17)O and (18)O...
September 8, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28863323/ethyl-pyruvate-reverses-development-of-pseudomonas-aeruginosa-pneumonia-during-sepsis-induced-immunosuppression
#8
Wei Chen, Jie Lian, Jing-Jing Ye, Qing-Fei Mo, Jie Qin, Guang-Liang Hong, Long-Wang Chen, Shao-Ce Zhi, Guang-Ju Zhao, Zhong-Qiu Lu
Sepsis is characterized by an innate immune response and the following immune dysfunction which can increase the emergence of secondary infections. Ethyl pyruvate (EP) has multiple immunoregulation functions in several serious illnesses, such as burn injury, severe sepsis and acute respiratory syndrome. However, little data was shown the effect of EP administration on immunosuppression post-CLP and the following secondary infection. The cecal ligation and puncture (CLP) followed by the induction of Pseudomonas aeruginosa (PA) was used as a clinically relevant two-hit model of sepsis...
November 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28858979/mir-195-modulates-oxidative-stress-induced-apoptosis-and-mitochondrial-energy-production-in-human-trophoblasts-via-flavin-adenine-dinucleotide-dependent-oxidoreductase-domain-containing-protein-1-and-pyruvate-dehydrogenase-phosphatase-regulatory-subunit
#9
Hao Wang, Lanmei Zhang, Xuejiang Guo, Yang Bai, Yu-Xia Li, Jiahao Sha, Chun Peng, Yan-Ling Wang, Ming Liu
OBJECTIVE: Preeclampsia is a severe pregnancy-specific syndrome defined as newly onset hypertension and proteinuria. Abnormal placental development has been generally accepted as the initial cause of the disorder. Recently, miR-195 was identified as one of the downregulated small RNAs in preeclamptic placentas. METHODS: The potential targets of miR-195 in human trophoblast cells were screened by isobaric tags for relative and absolute quantification-based mass spectrum analysis...
August 30, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28836378/ethyl-pyruvate-does-not-require-microglia-for-mediating-neuroprotection-after-excitotoxic-injury
#10
Philipp Pieroh, Daniel-Christoph Wagner, Chalid Ghadban, Gerd Birkenmeier, Faramarz Dehghani
AIMS: Ethyl pyruvate (EP) mediates protective effects after neuronal injury. Besides a direct conservation of damaged neurons, the modulation of indigenous glial cells has been suggested as one important mechanism for EP-related neuroprotection. However, the specific contribution of glial cells is still unknown. METHODS: Organotypic hippocampal slice cultures (OHSC) were excitotoxically lesioned by 50 μmol/L N-methyl-D-aspartate (NMDA, for 4 hours) or left untreated...
August 23, 2017: CNS Neuroscience & Therapeutics
https://www.readbyqxmd.com/read/28755135/macrophage-derived-hmgb1-as-a-pain-mediator-in-the-early-stage-of-acute-pancreatitis-in-mice-targeting-rage-and-cxcl12-cxcr4-axis
#11
Yuhei Irie, Maho Tsubota, Hiroyasu Ishikura, Fumiko Sekiguchi, Yuka Terada, Toshifumi Tsujiuchi, Keyue Liu, Masahiro Nishibori, Atsufumi Kawabata
Extracellular high mobility group box 1 (HMGB1) activates the receptor for advanced glycation end products (RAGE) or Toll-like receptor 4 (TLR4) and forms a heterocomplex with CXCL12 that strongly activates CXCR4, promoting inflammatory and pain signals. In the present study, we investigated the role of HMGB1 in pancreatic pain accompanying cerulein-induced acute pancreatitis in mice. Abdominal referred hyperalgesia accompanying acute pancreatitis occurred within 1 h after 6 hourly injections of cerulein. The anti-HMGB1 neutralizing antibody or recombinant human soluble thrombomodulin (rhsTM), known to inactivate HMGB1, abolished the cerulein-induced referred hyperalgesia, but not pancreatitis itself...
July 28, 2017: Journal of Neuroimmune Pharmacology: the Official Journal of the Society on NeuroImmune Pharmacology
https://www.readbyqxmd.com/read/28645008/effect-of-microrna-129-5p-targeting-hmgb1-rage-signaling-pathway-on-revascularization-in-a-collagenase-induced-intracerebral-hemorrhage-rat-model
#12
Xin-Long Ma, Shu-Ya Li, Feng Shang
BACKGROUND: This study aimed at exploring the effect of microRNA-129-5p (miR-129-5p) targeting high mobility group box-1 (HMGB1)-receptor for advanced glycation end-products (RAGE) signaling pathway on the revascularization in a collagenase-induced intracerebral hemorrhage (ICH) rat model. METHODS: OX26-pGFAP-IL, an immunoliposome expressing miR-129-5p was constructed. The collagenase-induced ICH rat models were successfully established by 96 Sprague Dawley (SD) rats, which were categorized into the sham group, ICH group, miR-129-5p group, negative control (NC) group, ethyl pyruvate (EP, an inhibitor of HMGB1) group and N-benzyl-4-chloro-N-cyclohe-xylbenzamide (FPS-ZM1, a RAGE receptor antagonist) group...
September 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28606778/hmgb1-promotes-neurovascular-remodeling-via-rage-in-the-late-phase-of-subarachnoid-hemorrhage
#13
Xiaodi Tian, Liang Sun, Dongxia Feng, Qing Sun, Yang Dou, Chenglin Liu, Feng Zhou, Haiying Li, Haitao Shen, Zhong Wang, Gang Chen
High-mobility group box1 (HMGB1) is a nuclear protein widely expressed in the central nervous system. Extracellular HMGB1 serves as a proinflammatory cytokine and contributes to brain injury during the acute stage post-stroke. Recently, increasing evidence has demonstrated beneficial effects of HMGB1 in some types of brain injury, but little is known about its effects during the late phase of subarachnoid hemorrhage (SAH). This study was designed to explore the potential roles and mechanisms of HMGB1 and its receptor, receptor for advanced glycation end-products (Rage), on brain recovery in the late stage of experimental SAH...
June 9, 2017: Brain Research
https://www.readbyqxmd.com/read/28601590/hepatoprotective-effects-of-ethyl-pyruvate-against-ccl4-induced-hepatic-fibrosis-via-inhibition-of-tlr4-nf-%C3%AE%C2%BAb-signaling-and-up-regulation-of-mmps-timps-ratio
#14
Mingxiao Zhang, Xiaosong Hu, Shuai Li, Chen Lu, Juan Li, Yonghua Zong, Wenqian Qi, Huijun Yang
BACKGROUND AND AIM: Liver fibrosis is a worldwide clinical issue. It has been well established that liver fibrosis is characterized of excessive extracellular matrix (ECM) deposition in chronically damaged livers. Accumulating evidences have suggested that ethyl pyruvate (EP) is a potential useful agent for preventing from hepatic injury. The aim of this study was to evaluate the protective effects of the EP against liver fibrosis induced by carbon tetrachloride (CCl4) in rats. METHOD: Rats were randomly divided into control group, CCl4 group and CCl4+EP group, which with and without EP administration...
June 7, 2017: Clinics and Research in Hepatology and Gastroenterology
https://www.readbyqxmd.com/read/28576319/chloroformate-derivatization-for-tracing-the-fate-of-amino-acids-in-cells-and-tissues-by-multiple-stable-isotope-resolved-metabolomics-msirm
#15
Ye Yang, Teresa W-M Fan, Andrew N Lane, Richard M Higashi
Amino acids have crucial roles in central metabolism, both anabolic and catabolic. To elucidate these roles, steady-state concentrations of amino acids alone are insufficient, as each amino acid participates in multiple pathways and functions in a complex network, which can also be compartmentalized. Stable Isotope-Resolved Metabolomics (SIRM) is an approach that uses atom-resolved tracking of metabolites through biochemical transformations in cells, tissues, or whole organisms. Using different elemental stable isotopes to label multiple metabolite precursors makes it possible to resolve simultaneously the utilization of these precursors in a single experiment...
July 11, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28570981/ethyl-pyruvate-alleviates-radiation-induced-lung-injury-in-mice
#16
Baoqing Chen, Feifei Na, Hui Yang, Rui Li, Mengqian Li, Xiaowen Sun, Binbin Hu, Guodong Huang, Jie Lan, He Xu, Ruizhan Tong, Xianming Mo, Jianxin Xue, You Lu
OBJECTIVE: Radiation-induced lung injury (RILI) is a common complication of thoracic cancer radiation therapy. Ethyl pyruvate (EP) was reported to have an ameliorating effect on a variety of systemic inflammation reactions, including acute lung injury. However, the protective effect of EP on RILI has not been explored. MATERIALS/METHODS: RILI was induced by a single thoracic irradiation of 16Gy X-rays in C57BL/6 mice. Mice were divided into four groups: control, radiation, 100mg/kg EP, and 200mg/kg dexamethasone...
August 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28538193/ethyl-pyruvate-protects-pc12-cells-from-oxygen-glucose-deprivation-a-potential-role-in-ischemic-cerebrovascular-disease
#17
Wenbo Li, Jiyu Lou, Liping Wei, Hongying Bai, Yaohui Zhang, Yuqing He
The protective potential of ethyl pyruvate (EP) on neuron has been investigated previously. This study was intended to investigate the effects of EP on the severity of oxygen-glucose deprivation (OGD)-induced injury in neural-like PC12 cells. PC12 cells were exposed to OGD condition with or without EP treatment. Then, cell viability, apoptosis, and the expressions of neurotrophic factors were detected. Further, Sprague-Dawley rats were intravenously administered with 5mg/kg EP for 14 days post-middle cerebral artery occlusion (MCAO)...
August 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28505390/correlation-between-chiral-modifier-adsorption-and-enantioselectivity-in-hydrogenation-catalysis
#18
Yufei Ni, Alexander D Gordon, Florisa Tanicala, Francisco Zaera
Infrared absorption spectroscopy performed in situ at the solid-liquid interface revealed that the adsorption on platinum supported catalysts of 1-(1-naphthyl)-ethylamine, which is used as a chiral modifier in hydrogenation catalysis, occurs through the amine group, not the aromatic ring as is widely believed. Comparisons were performed against a set of related modifier compounds with targeted substitutions to help identify the key moiety involved in the adsorption. It was determined that neither naphthalene-based modifiers without amine groups nor those with tertiary amine moieties are capable of adsorbing on the metal surface to any significant extent...
June 26, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28428710/cma-down-regulates-p53-expression-through-degradation-of-hmgb1-protein-to-inhibit-irradiation-triggered-apoptosis-in-hepatocellular-carcinoma
#19
Jing-Hua Wu, Jia-Pei Guo, Jun Shi, Hui Wang, Lei-Lei Li, Bin Guo, Dian-Xing Liu, Qing Cao, Zhi-Yong Yuan
AIM: To investigate the mechanism of chaperone-mediated autophagy (CMA)-induced resistance to irradiation-triggered apoptosis through regulation of the p53 protein in hepatocellular carcinoma (HCC). METHODS: Firstly, we detected expression of lysosome-associated membrane protein 2a (Lamp-2a), which is the key protein of CMA, by western blot in HepG2 and SMMC7721 cells after irradiation. We further used shRNA Lamp-2a HCC cells to verify the radioresistance induced by CMA...
April 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28427942/inhibitory-effects-of-ethyl-pyruvate-on-platelet-aggregation-and-phosphatidylserine-exposure
#20
Wenjin Li, Xinyu Yang, Minyuan Peng, Can Li, Guangfu Mu, Fangping Chen
Ethyl pyruvate (EP) is a stable lipophilic pyruvate derivative. Studies demonstrated that EP shows potent anti-oxidation, anti-inflammatory and anti-coagulant effects. Inflammation and coagulation are closely interacted with platelet activation. However, it is unclear whether EP has anti-platelet effects. Therefore, we investigated the anti-platelet effect of EP in this study in vitro. We found that EP inhibited agonists induced platelets aggregation, ATP release and adhesion to collagen. Flow cytometric analysis revealed that EP inhibited agonist induced platelets PAC-1 binding, as well as P-selectin and CD40L expression...
June 3, 2017: Biochemical and Biophysical Research Communications
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