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D-galactosamine

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https://www.readbyqxmd.com/read/28638224/inhibitory-effect-of-oxymatrine-on-hepatocyte-apoptosis-via-tlr4-pi3k-akt-gsk-3%C3%AE-signaling-pathway
#1
Xian Zhang, Wei Jiang, Ai-Ling Zhou, Min Zhao, Dao-Rong Jiang
AIM: To evaluate the effect of oxymatrine (OMT) on hepatocyte apoptosis in rats with lipopolysaccharide (LPS)/D-galactosamine (D-GalN)-induced acute liver failure (ALF). METHODS: LPS/D-GalN was used to establish a model of ALF in rats. To evaluate the effect of OMT, we assessed apoptosis by transmission electron microscopy, and the pathological changes in the liver by light microscopy with hematoxylin and eosin staining. An automated biochemical analyzer was used to measure serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST)...
June 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28634301/microbial-glycoside-hydrolases-as-antibiofilm-agents-with-cross-kingdom-activity
#2
Brendan D Snarr, Perrin Baker, Natalie C Bamford, Yukiko Sato, Hong Liu, Mélanie Lehoux, Fabrice N Gravelat, Hanna Ostapska, Shane R Baistrocchi, Robert P Cerone, Elan E Filler, Matthew R Parsek, Scott G Filler, P Lynne Howell, Donald C Sheppard
Galactosaminogalactan and Pel are cationic heteropolysaccharides produced by the opportunistic pathogens Aspergillus fumigatus and Pseudomonas aeruginosa, respectively. These exopolysaccharides both contain 1,4-linked N-acetyl-d-galactosamine and play an important role in biofilm formation by these organisms. Proteins containing glycoside hydrolase domains have recently been identified within the biosynthetic pathway of each exopolysaccharide. Recombinant hydrolase domains from these proteins (Sph3h from A...
June 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28633873/elental%C3%A2-amino-acid-component-has-protective-effects-on-primary-cultured-hepatocytes-and-a-rat-model-of-acute-liver-injury
#3
Hirokazu Miki, Katsuji Tokuhara, Masaharu Oishi, Yoshito Tanaka, Richi Nakatake, Yosuke Ueyama, Masaki Kaibori, Mikio Nishizawa, Tadayoshi Okumura, Masanori Kon
Amino acids can exert protective effects on the liver either when administered as a medication or following an operation. In this study, we examined the protective effects of amino acids on the liver using in vitro and in vivo models by studying their influence on the induction of inducible nitric oxide synthase (iNOS) and nitric oxide production as a liver injury marker in cultured hepatocytes and liver-protective effects in d-galactosamine and lipopolysaccharide (GalN/LPS)-treated rats, respectively. Primary cultured rat hepatocytes were treated with interleukin (IL)-1β in the presence or absence of Elental® amino acid component (EleAA; 17 amino acids)...
June 2017: Nutrition Research
https://www.readbyqxmd.com/read/28630008/contribution-of-the-carbohydrate-binding-ability-of-vatairea-guianensis-lectin-to-induce-edematogenic-activity
#4
Gabriela F O Marques, Vinicius J S Osterne, Livia M Almeida, Luiz A C Brizeno, Vanir R Pinto-Junior, Mayara Q Santiago, Antonio H B Neco, Mario R L Mota, Luiz A G Souza, Kyria S Nascimento, Alana F Pires, Benildo S Cavada, Ana M S Assreuy
Vatairea guianensis lectin (VGL), Dalbergiae tribe, is a N-acetyl-galactosamine (GalNAc)/Galactose (Gal) lectin previously purified and characterized. In this work, we report its structural features, obtained from bioinformatics tools, and its inflammatory effect, obtained from a rat paw edema model. The VGL model was obtained by homology with the lectin of Vatairea macrocarpa (VML) as template, and we used it to demonstrate the common characteristics of legume lectins, such as the jellyroll motif and presence of a metal-binding site in the vicinity of the carbohydrate-recognition domain (CRD)...
June 16, 2017: Biochimie
https://www.readbyqxmd.com/read/28628850/indoline-derivatives-mitigate-liver-damage-in-a-mouse-model-of-acute-liver-injury
#5
Efrat Finkin-Groner, Shlomi Finkin, Shani Zeeli, Marta Weinstock
BACKGROUND: Exposure of mice to D-galactosamine (GalN) and lipopolysaccharide (LPS) induces acute liver failure through elevation of TNF-α, which causes liver damage resembling that in humans. The current study evaluated in this model the effect of two indoline derivatives, which have anti-inflammatory activity in macrophages. METHODS: AN1297 and AN1284 (0.025-0.75mg/kg) or dexamethasone (3mg/kg), were injected subcutaneously, 15min before intraperitoneal injection of GalN (800mg) plus LPS (50μg) in male Balb/C mice...
April 12, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/28606257/-microflora-changes-in-upper-digestive-tract-and-bile-in-acute-liver-failure-mice
#6
H J Liu, L Yu, Y X Hu, M L Cheng
Objective: To study the changes of upper digestive tract and bile flora associated with acute liver failure in mice. Methods: Mice were randomly divided into 2 groups: control group and acute liver failure group (group M). Acute liver failure in group M was induced by intraperitoneal injection of D-galactosamine (D-GaIN). The information of relative abundance and diversity were observed by high-throughput sequencing of V3 + V4 region in 16 S rDNA from bacteria of oral cavity, stomach, duodenal and bile.Bacterial translocation and changes associated with acute liver injury were identified by LEfSe (LDA effect size) analysis...
June 6, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28600667/peroxisome-proliferator-activated-receptor-alpha-mediates-c-ebp-homologous-protein-to-protect-mice-from-acute-liver-failure
#7
Xiangying Zhang, Peiling Dong, Hongbo Shi, Huaying Sun, Jianhui Lin, Dexi Chen, Zhongping Duan, Xiuhui Li, Feng Ren
OBJECTIVE: Peroxisome proliferator-activated receptor α (PPARα) activation has been reported to ameliorate liver injury in cases of acute liver failure (ALF). However, its intrinsic protective molecular mechanisms remain largely undetermined. C/EBP homologous protein (CHOP) is an important mediator of lipopolysaccharide (LPS)-induced inflammation. The aim of the present study was to test the hypothesis that PPARα activation alleviates liver inflammation to protect mice from acute liver failure (ALF) mediated by CHOP...
June 9, 2017: Inflammation Research: Official Journal of the European Histamine Research Society ... [et Al.]
https://www.readbyqxmd.com/read/28594379/anti-inflammatory-activities-and-liver-protection-of-alisol-f-and-25-anhydroalisol-f-through-the-inhibition-of-mapk-stat3-and-nf-%C3%AE%C2%BAb-activation-in-vitro-and-in-vivo
#8
Xiaoxu Bi, Pu Wang, Qingjuan Ma, Li Han, Xingbo Wang, Yu Mu, Peipei Guan, Xiaodan Qu, Zhanyou Wang, Xueshi Huang
Alisol F and 25-anhydroalisol F isolated from Alisma orientale, were proved to exhibit anti-inflammatory potential in our previous work. In the current study, the anti-inflammatory effects and action mechanisms of alisol F and 25-anhydroalisol F were investigated in vitro. Moreover, the pharmacological effects of alisol F in lipopolysaccharide (LPS)/d-galactosamine (d-gal)-induced acute liver-injured mice were evaluated. The results demonstrated that alisol F and 25-anhydroalisol F could suppress LPS-induced production of nitric oxide (NO), interleukin-6 (IL-6), tumor necrosis factor alpha (TNF-α), and interleukin-1β (IL-1β), as well as inhibit the mRNA and protein levels of inducible nitric oxide (iNOS) and cyclooxygenase-2 (COX-2)...
June 8, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28586545/multifaceted-therapeutic-benefits-of-factors-derived-from-stem-cells-from-human-exfoliated-deciduous-teeth-for-acute-liver-failure-in-rats
#9
Yoshihiro Matsushita, Masatoshi Ishigami, Kohki Matsubara, Megumi Kondo, Hirotaka Wakayama, Hidemi Goto, Minoru Ueda, Akihito Yamamoto
In acute liver failure (ALF), a poorly controlled innate immune response causes massive hepatic destruction, which elicits a systemic inflammatory response, progressive multiple organ failure and ultimate sudden death. Although the liver has inherent tissue-repairing activities, its regeneration during ALF fails, and orthotopic liver transplantation is the only curative approach. Here we show that a single intravenous administration of stem cells derived from human exfoliated deciduous teeth (SHEDs) or of SHED-derived serum-free conditioned medium (SHED-CM) into the d-galactosamine-induced rat model of ALF markedly improved the condition of the injured liver and the animals' survival rate...
June 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28586153/mir-19a-affects-hepatocyte-autophagy-via-regulating-lncrna-nbr2-and-ampk-ppar%C3%AE-in-d-galn-lipopolysaccharide-stimulated-hepatocytes
#10
Yan-Min Liu, Jin-Hui Ma, Qing-Lei Zeng, Jun Lv, Xu-Hua Xie, Ya-Jie Pan, Zu-Jiang Yu
Objective This study aims to evaluate the potential involvement and regulatory mechanism of miR-19a in hepatocytes autophagy of acute liver failure (ALF). Material and methods The in vitro hepatocytes injury model of primary hepatocyte and hepatocytes line HL-7702 was established by D-galactosamine (D-GalN) and lipopolysaccharide (LPS) co-treatment. Relative expression level of miR-19a and NBR2 was determined by qRT-PCR. Protein expression of AMPK/PPARα and autophagy-related gene was determined by western blot...
June 6, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28578394/integrated-proteomic-and-metabolomic-analysis-reveals-that-rhodomyrtone-reduces-the-capsule-in-streptococcus-pneumoniae
#11
Watcharapong Mitsuwan, Alfonso Olaya-Abril, Mónica Calderón-Santiago, Irene Jiménez-Munguía, José Antonio González-Reyes, Feliciano Priego-Capote, Supayang P Voravuthikunchai, Manuel J Rodríguez-Ortega
The emergence of antibiotic-resistant pathogenic bacteria is a healthcare problem worldwide. We evaluated the antimicrobial activity of rhodomyrtone, an acylphloroglucinol present in Rhodomyrtus tomentosa leaves, against the human Gram-positive pathogen Streptococcus pneumoniae. The compound exhibited pronounced anti-pneumococcal activity against a broad collection of clinical isolates. We studied the effects at the molecular level by integrated proteomic and metabolomic analysis. The results revealed alterations in enzymes and metabolites involved in several metabolic pathways including amino acid biosynthesis, nucleic acid biosynthesis, glucid, and lipid metabolism...
June 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28577493/inhibition-of-pi3k-akt-mtor-signaling-pathway-protects-against-d-galactosamine-lipopolysaccharide-induced-acute-liver-failure-by-chaperone-mediated-autophagy-in-rats
#12
Yin Li, Ling Lu, Ning Luo, Yong-Qiang Wang, Hong-Mei Gao
OBJECTIVE: This study aims to investigate the effects of PI3K/AKt/mTOR signaling pathway on the proliferation and apoptosis in acute liver failure (ALF) by chaperone mediated autophagy (CMA). METHODS: The hepatocytes extracted from both normal rats and rats with ALF were assigned to control, acute injury, P13K agonist, and P13K inhibitor groups. Quantitative real-time polymerase chain reaction (qRT-PCR) and western blotting were used as part of this investigation to detect the expression of PI3K/AKt/mTOR signaling pathway related-proteins (PI3K, AKt, mTOR), apoptosis related-proteins (Fas, Bax, Bcl-2), chaperone-mediated autophagy (CMA) marker proteins (LAMP-2A, HSC 70), p-PI3K, p-AKt, p-4E-BPI, and p-S6K...
August 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28546025/molecular-and-functional-characterization-of-a-glycosylated-galactose-binding-lectin-from-mytilus-californianus
#13
Efrén García-Maldonado, Patricia Cano-Sánchez, Alejandra Hernández-Santoyo
Lectins play crucial roles for innate immune responses in invertebrates by recognizing and eliminating pathogens. In this study, a lectin from the mussel Mytilus californianus (MCL) was identified and characterized. The lectin was purified by affinity chromatography in α-lactose-agarose resin showing an experimental molecular mass of 18000 Da as determined by SDS-PAGE and MALDI-TOF mass spectrometry. It was specific for binding d-galactose and N-Acetyl-d-galactosamine that contained carbohydrate moieties that were also inhibited by melibiose and raffinose...
July 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28540169/establishment-of-a-new-acute-on-chronic-liver-failure-model
#14
Fangfang Li, Luyang Miao, Hua Sun, Yuyang Zhang, Xiuqi Bao, Dan Zhang
To establish an animal model of acute-on-chronic liver failure (ACLF) that would replicate the pathological process of ACLF in humans, rats were administered porcine serum (PS) for 11 weeks. Liver fibrosis was determined by pathological and biochemical assessments. The animals then were injected with d-galactosamine (d-gal) and lipopolysaccharide (LPS). The survival times of animals with cirrhosis and ACLF were determined over 48 h. Other animals were killed at 0, 4, 8 and 12 h after administration of d-gal/LPS...
May 2017: Acta Pharmaceutica Sinica. B
https://www.readbyqxmd.com/read/28537085/two-new-iridoid-glycosides-from-the-leaves-of-callicarpa-nudiflora
#15
Jie Wang, Hui-Zheng Fu, Yue-Hua Luo, Yuan-Yu Ma, Bo Huang, Shuang-Cheng Ma
Two new iridoid glycosides, callicoside C (1) and callicoside D (2), together with three known compounds (3-5), were isolated from the leaves of Callicarpa nudiflora. Their structures were established by 1D and 2D NMR spectroscopy and mass spectrometry. In an in vitro bioassay, compound 1 showed pronounced hepatoprotective activity against d-galactosamine-induced toxicity in WB-F344 rat hepatic epithelial stem-like cells.
May 24, 2017: Journal of Asian Natural Products Research
https://www.readbyqxmd.com/read/28526886/fk866-attenuates-acute-hepatic-failure-through-c-jun-n-terminal-kinase-jnk-dependent-autophagy
#16
Enshuang Guo, Renlong Li, Jiankun Yang, Jun Zhang, Anyi Li, Yan Yang, Shenpei Liu, Anding Liu, Xiaojing Jiang
FK866 exhibits a protective effect on D-galactosamine (GaIN)/lipopolysaccharide (LPS) and concanavalin A (ConA)-induced acute liver failure (ALF), but the mechanism by which FK866 affords this benefit has not yet been elucidated. Autophagy has a protective effect on acute liver injury. However, the contribution of autophagy to FK866-conferred hepatoprotection is still unclear. This study aimed to investigate whether FK866 could attenuate GaIN/LPS and ConA-induced ALF through c-jun-N-terminal kinase (JNK)-dependent autophagy...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28522898/the-protective-effect-of-cordycepin-on-d-galactosamine-lipopolysaccharide-induced-acute-liver-injury
#17
Jin Li, Liping Zhong, Haibo Zhu, Fengzhong Wang
As the major active ingredient of Cordyceps militaris, cordycepin (3'-deoxyadenosine) has been well documented to alleviate inflammation and oxidative stress both in vitro and in vivo. To explore the potential protective effect of cordycepin in fulminant hepatic failure, mice were pretreated with cordycepin for 3 weeks followed by D-galactosamine (GalN)/lipopolysaccharide (LPS) injection. Then we found cordycepin (200 mg/kg) administration elevated survival rate, improved liver function, and suppressed hepatocyte apoptosis and necrosis in mice with severe hepatic damage by GalN/LPS treatment...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/28494549/-changes-in-the-composition-of-intestinal-microbiota-in-mice-with-acute-liver-failure-induced-by-d-galactosamine
#18
Y X Hu, L Yu, H J Liu, M L Cheng
Objective: To investigate the changes in the composition of intestinal microbiota in mice with acute liver failure and identify characteristic bacteria, and to provide a basis for the diagnosis and treatment of acute liver failure with intestinal microbiota disorders. Methods: A total of 30 specific pathogen-free male BALB/c mice were used in this study, including 25 mice in the model group and 5 mice in the control group. An acute liver failure model was induced by D-galactosamine. Microbial DNA was extracted from intestinal contents in different segments of the lower digestive tract (ileum and colon) and feces and then were amplified using PCR...
April 20, 2017: Zhonghua Gan Zang Bing za Zhi, Zhonghua Ganzangbing Zazhi, Chinese Journal of Hepatology
https://www.readbyqxmd.com/read/28482409/-protective-effect-of-glycogen-synthase-kinase-3%C3%AE-inhibition-via-peroxisome-proliferator-activated-receptor-alpha-activation-in-mice-with-acute-liver-failure
#19
H B Shi, H L Shi, X Y Zhang, D X Chen, Z P Duan, F Ren
Objective: To investigate the role of the glycogen synthase kinase 3β (GSK3β) and the peroxisome proliferator-activated receptor alpha (PPARα) signaling pathway in acute liver failure and related mechanisms in a mouse model of acute liver failure induced by D-galactosamine/lipopolysaccharide (D-GalN/LPS). Methods: C57BL/6 mice were given intraperitoneal injection of D-GalN/LPS to establish a mouse model of acute liver failure. SB216763 was used to inhibit the activity of GSK3β and PPARα siRNA was used to inhibit the expression of PPARα...
March 20, 2017: Zhonghua Gan Zang Bing za Zhi, Zhonghua Ganzangbing Zazhi, Chinese Journal of Hepatology
https://www.readbyqxmd.com/read/28479727/exploratory-studies-of-epicatechin-a-bioactive-compound-of-phyllanthus-niruri-on-the-antioxidant-enzymes-and-oxidative-stress-markers-in-d-galactosamine-induced-hepatitis-in-rats-a-study-with-reference-to-clinical-prospective
#20
Bhasha Shanmugam, Kondeti Ramudu Shanmugam, Sahukari Ravi, Ganjikunta Venkata Subbaiah, Chilakala Ramakrishana, Korivi Mallikarjuna, Kesireddy Sathyavelu Reddy
BACKGROUND: Hepatitis is a health problem affecting millions of people worldwide and it is the major risk factor for liver cirrhosis. In India, many plants are used to treat hepatitis. But little is known about the effects of (-)-epicatechin a bioactive compound of Phyllanthus niruri (PN) in hepatitis rats. OBJECTIVE: The present study was designed to explore the antioxidant property of (-)-epicatechin isolated from PN in D-Galactosamine (D-GalN) induced hepatitis rats...
January 2017: Pharmacognosy Magazine
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