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liver detoxification

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https://www.readbyqxmd.com/read/29350485/purification-of-glutathione-s-transferase-enzyme-from-quail-liver-tissue-and-inhibition-effects-of-3ar-4s-7r-7as-2-4-e-3-aryl-acryloyl-phenyl-3a-4-7-7a-tetrahydro-1h-4-7-methanoisoindole-1-3-2h-dione-derivatives-on-the-enzyme-activity
#1
Yusuf Temel, Umit M Koçyigit, M Şerif Taysı, Faik Gökalp, Meliha Burcu Gürdere, Yakup Budak, Mustafa Ceylan, İlhami Gülçin, Mehmet Çiftci
The use of quail meat and eggs has made this animal important in recent years, with its low cost and high yields. Glutathione S-transferases (GST, E.C.2.5.1.18) are an important enzyme family, which play a critical role in detoxification system. In our study, GST was purified from quail liver tissue with 47.88-fold purification and 12.33% recovery by glutathione agarose affinity chromatography. The purity of enzyme was checked by SDS-PAGE method and showed a single band. In addition, inhibition effects of (3aR,4S,7R,7aS)-2-(4-((E)-3-(aryl)acryloyl)phenyl)-3a,4,7,7a-tetrahydro-1H-4,7methanoisoindole-1,3(2H)-dion derivatives (1a-g) were investigated on the enzyme activity...
January 19, 2018: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/29343427/controlled-attenuation-parameter-and-alcoholic-hepatic-steatosis-diagnostic-accuracy-and-role-of-alcohol-detoxification
#2
Maja Thiele, Vanessa Rausch, Gabriele Fluhr, Maria Kjærgaard, Felix Piecha, Johannes Mueller, Beate Katharina Straub, Monica Lupşor-Platon, Victor De-Ledinghen, Helmut Karl Seitz, Sönke Detlefsen, Bjørn Madsen, Aleksander Krag, Sebastian Mueller
BACKGROUND AND AIMS: Controlled attenuation parameter (CAP) is a novel non-invasive measure of hepatic steatosis, but has not been evaluated in alcoholic liver disease. We therefore aimed to validate CAP for assessment of biopsy-verified alcoholic steatosis and to study the effect of alcohol detoxification on CAP. METHODS: Cross-sectional, biopsy-controlled, diagnostic study in four European liver centers. Consecutive alcohol-overusing patients underwent concomitant CAP, regular ultrasound and liver biopsy...
January 14, 2018: Journal of Hepatology
https://www.readbyqxmd.com/read/29342849/comparative-response-of-the-hepatic-transcriptomes-of-domesticated-and-wild-turkey-to-aflatoxin-b%C3%A2
#3
Kent M Reed, Kristelle M Mendoza, Juan E Abrahante, Roger A Coulombe
The food-borne mycotoxin aflatoxin B₁ (AFB₁) poses a significant risk to poultry, which are highly susceptible to its hepatotoxic effects. Domesticated turkeys (Meleagris gallopavo) are especially sensitive, whereas wild turkeys (M. g. silvestris) are more resistant. AFB₁ toxicity entails bioactivation by hepatic cytochrome P450s to the electrophilic exo-AFB₁-8,9-epoxide (AFBO). Domesticated turkeys lack functional hepatic GST-mediated detoxification of AFBO, and this is largely responsible for the differences in resistance between turkey types...
January 13, 2018: Toxins
https://www.readbyqxmd.com/read/29336038/a-single-nucleotide-polymorphism-in-the-canine-cytochrome-b5-reductase-cyb5r3-gene-is-associated-with-sulfonamide-hypersensitivity-and-is-overrepresented-in-doberman-pinschers
#4
J M Reinhart, J Ekena, A C Cioffi, L A Trepanier
Canine sulfonamide hypersensitivity (HS) has been associated with a variant in the cytochrome b5 reductase gene (CYB5R3 729A>G), which encodes a drug-detoxifying enzyme. Study objectives were to determine variant allele frequency in Doberman Pinschers (DOBE), a breed which may be predisposed to sulfonamide HS, and to characterize the effects of CYB5R3 729G on gene expression and function. CYB5R3 729A>G allele frequencies were compared between DOBE (n = 24) vs. non-Doberman (non-DOBE; n = 60) dogs...
January 15, 2018: Journal of Veterinary Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29335169/seasonal-variations-in-fine-particle-composition-from-beijing-prompt-oxidative-stress-response-in-mouse-lung-and-liver
#5
Michal Pardo, Fanfan Xu, Xinghua Qiu, Tong Zhu, Yinon Rudich
Exposure to air pollution can induce oxidative stress, inflammation and adverse health effects. To understand how seasonal and chemical variations drive health impacts, we investigated indications for oxidative stress and inflammation in mice exposed to water and organic extracts from urban fine particles/PM2.5 (particles with aerodynamic diameter ≤ 2.5 μm) collected in Beijing, China. Higher levels of pollution components were detected in heating season (HS, winter and part of spring) PM2.5 than in the non-heating season (NHS, summer and part of spring and autumn) PM2...
January 12, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29327633/biochemical-basis-for-the-age-related-sensitivity-of-broilers-to-aflatoxin-b1
#6
He Wang, Wei Li, Ishfaq Muhammad, Xiaoqi Sun, Xiaoxu Cui, Ping Cheng, Qayum Abdul, Xiuying Zhang
In this study, we investigated the mechanism underlying age-related susceptibility in broilers to aflatoxin B1 (AFB1). The results showed that AFB1 induced significant changes in serum alkaline phosphatase (ALP), alanine aminotransferase (ALT), aspartate aminotransferase (AST), gamma-glutamyl transferase (GGT) activity & liver superoxide dismutase (SOD), malonaldehyde (MDA), glutathione peroxidase (GSH-Px) and glutathione S-transferase (GST) activity at day 7, 21 and 42 relative to control group. However, AFB1-induced changes in serum biochemical parameters and liver antioxidant activities becomes less severe with increasing age of broilers...
January 12, 2018: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/29319892/role-of-cytochrome-p450-2b-sequence-variation-and-gene-copy-number-in-facilitating-dietary-specialization-in-mammalian-herbivores
#7
Smiljka Kitanovic, Teri J Orr, Daniel Spalink, Granger B Cocke, Katharina Schramm, P Ross Wilderman, James R Halpert, M Denise Dearing
Theory postulates that dietary specialization in mammalian herbivores is enabled by a specialized set of liver enzymes that process the high concentrations of similar plant secondary metabolites (PSMs) in the diets of specialists. To investigate whether qualitative and quantitative differences in detoxification mechanisms distinguish dietary specialists from generalists, we compared the sequence diversity and gene copy number of detoxification enzymes in two woodrat species: a generalist, the white-throated woodrat (Neotoma albigula), and a juniper specialist, Stephens' woodrat (N...
January 10, 2018: Molecular Ecology
https://www.readbyqxmd.com/read/29305270/the-protective-effect-of-diallyl-trisulfide-on-cytopenia-induced-by-benzene-through-modulating-benzene-metabolism
#8
Wenting Han, Shuo Wang, Ming Li, Lulu Jiang, Xujing Wang, Keqin Xie
It has been known that metabolism of benzene is necessary for its toxicity. The purpose of our study is to investigate the effect of diallyl trisulfide (DATS) on attenuating cytopenia in peripheral blood introduced by benzene through regulating benzene metabolism in rats. We established benzene poisoning model with benzene (1.3 g/kg), while the DATS treatment groups were treated with DATS plus benzene (15 or 30 mg/kg) for 28 days, respectively. The results of blood parameters and concentration of metabolites of benzene (t, t-MA and SPMA) determination in urine showed that DATS could effectively attenuate the cytopenia induced by benzene through regulating benzene metabolism...
January 2, 2018: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29304407/the-effect-of-chlorpyrifos-on-salinity-acclimation-of-juvenile-rainbow-trout-oncorhynchus-mykiss
#9
Bagher Mojazi Amiri, Elvis Genbo Xu, Allison Kupsco, Marissa Giroux, Mahbubeh Hoseinzadeh, Daniel Schlenk
As a part of their unique life cycle, most salmonids undergo a transition from fresh water to salt water requiring various adjustments in metabolism, osmoregulation and ion regulation. Exposure to pesticides may affect the acclimation of juvenile salmonids to salt water during downstream migration to estuaries. Using the Caspian Sea as a model waterbody, the present study aimed to determine how the toxicity of the organophosphate pesticide chlorpyrifos (CPF) impacts saline acclimation of rainbow trout (Oncorhynchus mykiss)...
December 28, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/29299986/significance-of-hepatoprotective-liver-specific-targeted-drug-delivery-a-review-on-novel-herbal-and-formulation-approaches-in-management-of-hepatotoxicity
#10
Surbhi Rohilla, D C Bhatt
BACKGROUND: The liver is the largest and vital organ present in all vertebrates. It performs various major functions such as detoxification, metabolism, protein synthesis, excretion and so on. Liver cells are divided into parenchymal cells and non-parenchymal cells. Hepatocytes, Kupffer cells, hepatic stellate cells and sinusoidal endothelial cells, etc are found in liver having different receptors present on their surface which can be used for liver targeting by binding to different ligands...
January 3, 2018: Current Drug Targets
https://www.readbyqxmd.com/read/29289830/the-synergistic-effects-of-waterborne-microcystin-lr-and-nitrite-on-hepatic-pathological-damage-lipid-peroxidation-and-antioxidant-responses-of-male-zebrafish
#11
Wang Lin, Jie Hou, Honghui Guo, Li Li, Lingkai Wang, Dandan Zhang, Dapeng Li, Rong Tang
Hazardous materials from decaying cyanobacterial blooms, such as microcystin-LR (MC-LR) and nitrite pose serious challenges to aquatic organisms. To assess combined toxic effects of MC-LR and nitrite on hepatic pathology, lipid peroxidation and antioxidant responses of fish, adult male zebrafish (Danio rerio) were exposed to solutions with different combined concentrations of MC-LR (0, 3, 30 μg/L) and nitrite (0, 2, 20 mg/L) for 30 d. The results showed that hepatic pathological lesions progressed in severity and extent with increasing concentration of single factor MC-LR or nitrite and became more severe in co-exposure groups...
December 28, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29282500/metabolism-of-a-sea-lamprey-pesticide-by-fish-liver-enzymes-part-a-identification-and-synthesis-of-tfm-metabolites
#12
Ugo Bussy, Yu-Wen Chung-Davidson, Tyler Buchinger, Ke Li, Scott A Smith, A Daniel Jones, Weiming Li
The sea lamprey (Petromyzon marinus) is a destructive invasive species in the Great Lakes that contributed to the collapse of native fish populations in the mid-1900s. 3-Trifluoromethyl-4-nitrophenol (TFM) is a selective pesticide that has been applied to sea lamprey infested tributaries of the Great Lakes to kill larvae since the 1960s and has reduced the populations by as much as 90%. However, the metabolism of TFM by sea lamprey and non-target species is not fully illuminated. Elucidation of TFM metabolism is critical for understanding its mode of action and possible environmental impact...
December 28, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29279371/enhancement-of-hepatic-autophagy-increases-ureagenesis-and-protects-against-hyperammonemia
#13
Leandro R Soria, Gabriella Allegri, Dominique Melck, Nunzia Pastore, Patrizia Annunziata, Debora Paris, Elena Polishchuk, Edoardo Nusco, Beat Thöny, Andrea Motta, Johannes Häberle, Andrea Ballabio, Nicola Brunetti-Pierri
Ammonia is a potent neurotoxin that is detoxified mainly by the urea cycle in the liver. Hyperammonemia is a common complication of a wide variety of both inherited and acquired liver diseases. If not treated early and thoroughly, it results in encephalopathy and death. Here, we found that hepatic autophagy is critically involved in systemic ammonia homeostasis by providing key urea-cycle intermediates and ATP. Hepatic autophagy is triggered in vivo by hyperammonemia through an α-ketoglutarate-dependent inhibition of the mammalian target of rapamycin complex 1, and deficiency of autophagy impairs ammonia detoxification...
December 26, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29274776/nrf2-p62-autophagy-pathway-and-its-response-to-oxidative-stress-in-hepatocellular-carcinoma
#14
REVIEW
Bartolini Desirée, Dallaglio Katiuscia, Torquato Pierangelo, Piroddi Marta, Francesco Galli
Deregulation of autophagy is proposed to play a key pathogenic role in hepatocellular carcinoma (HCC), the most common primary malignancy of the liver and the third leading cause of cancer death. Autophagy is an evolutionarily conserved catabolic process activated to degrade and recycle cell's components. Under stress conditions, such as oxidative stress and nutrient deprivation, autophagy is an essential survival pathway that operates in harmony with other stress response pathways. These include the redox-sensitive transcription complex Nrf2-Keap1 that controls groups of genes with roles in detoxification and antioxidant processes, intermediary metabolism, and cell cycle regulation...
November 29, 2017: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/29249928/the-antioxidant-cofactor-alpha-lipoic-acid-may-control-endogenous-formaldehyde-metabolism-in-mammals
#15
Anastasia V Shindyapina, Tatiana V Komarova, Ekaterina V Sheshukova, Natalia M Ershova, Vadim N Tashlitsky, Alexander V Kurkin, Ildar R Yusupov, Garik V Mkrtchyan, Murat Y Shagidulin, Yuri L Dorokhov
The healthy human body contains small amounts of metabolic formaldehyde (FA) that mainly results from methanol oxidation by pectin methylesterase, which is active in a vegetable diet and in the gastrointestinal microbiome. With age, the ability to maintain a low level of FA decreases, which increases the risk of Alzheimer's disease and dementia. It has been shown that 1,2-dithiolane-3-pentanoic acid or alpha lipoic acid (ALA), a naturally occurring dithiol and antioxidant cofactor of mitochondrial α-ketoacid dehydrogenases, increases glutathione (GSH) content and FA metabolism by mitochondrial aldehyde dehydrogenase 2 (ALDH2) thus manifests a therapeutic potential beyond its antioxidant property...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29249740/a-case-of-infectious-enterocolitis-with-hyperammonemia
#16
Ken Otsuji, Satoko Simizu, Takeru Endo, Ayako Kanazawa, Hideaki Arai, Keiji Nagata, Nobuya Harayama, Shunichi Nihei, Keiji Aibara, Mitsumasa Saito, Masayuki Kamochi
Case reports of hyperammonemia due to urease-producing bacteria are found occasionally, but most of them are associated with urinary tract infections. We experienced a case of infectious enterocolitis with hyperammonemia in which the causative bacteria was speculated to be urease-producing bacteria. A Japanese woman in her 70s had been diagnosed with microscopic polyangiitis in a nearby hospital and was transferred to our hospital. Although the microscopic polyangiitis was relatively under control after treatment with steroids and rituximab, frequent diarrhea with hyperammonemia (324 µg/dl) appeared and she became comatose...
2017: Journal of UOEH
https://www.readbyqxmd.com/read/29224272/-the-development-and-status-of-bioartificial-liver
#17
G L Li, S M Wang
Liver failure is a serious stage during liver disease development of which mobidity is high. There is no effective treatment at present.Artificial liver support system is one of the important methods to treat liver failure which includes non-biological artificial liver, biological artificial liver and hybrid artificial liver. Among the artificial liver devices. The bioartificial liver is the most similar artifical liver device to human liver in terms of detoxification, synthesis and metabolism currently.The complexity of human liver function makes the biological artificial liver facing great challenges in selection of liver seed cells, construction of bioreactor and the best combination with auxiliary device, which leads to the slow development of bioartificial liver...
December 1, 2017: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/29213265/lactobacillus-plantarum-mys6-ameliorates-fumonisin-b1-induced-hepatorenal-damage-in-broilers
#18
B V Deepthi, Rakesh Somashekaraiah, K Poornachandra Rao, N Deepa, N K Dharanesha, K S Girish, M Y Sreenivasa
Fumonisin B1 (FB1), a mycotoxin produced by Fusarium species is a predominant Group 2B carcinogen occurring in maize and maize-based poultry feeds. It is shown to be nephrotoxic, hepatotoxic, neurotoxic, and immunosuppressing in animals. In this study, we report the ameliorating effects of a probiotic strain, Lactobacillus plantarum MYS6 on FB1-induced toxicity and oxidative damage in broilers. A 6-week dietary experiment consisting of 48 broilers was performed in six treatment groups. Probiotic treatment (109 cells/mL) involved pre-colonization of broilers with L...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29204300/yogi-detox-tea-a-potential-cause-of-acute-liver-failure
#19
Keerthana Kesavarapu, Mitchell Kang, Jaewook James Shin, Kenneth Rothstein
We present a case of acute fulminant liver failure from a liver detoxification tea. We present a 60-year-old female with weakness, lethargy, scleral icterus, jaundice, and worsening mental status. She drank herbal tea three times a day for 14 days prior to symptom development. Liver tests were elevated. Remaining laboratory tests and imaging were negative for other etiologies. An ultrasound-guided liver biopsy showed submassive necrosis. A literature search on the ingredients shows six ingredients as having hepatotoxic effects and remaining ingredients as having very sparse hepatoprotective data...
2017: Case Reports in Gastrointestinal Medicine
https://www.readbyqxmd.com/read/29204052/pregnane-x-receptor-and-constitutive-androstane-receptor-modulate-differently-cyp3a-mediated-metabolism-in-early-and-late-stage-cholestasis
#20
Daniela Gabbia, Arianna Dalla Pozza, Laura Albertoni, Roberta Lazzari, Giorgia Zigiotto, Maria Carrara, Vincenzo Baldo, Tatjana Baldovin, Annarosa Floreani, Sara De Martin
AIM: To ascertain whether cholestasis affects the expression of two CYP3A isoforms (CYP3A1 and CYP3A2) and of pregnane X receptor (PXR) and constitutive androstane receptor (CAR). METHODS: Cholestasis was induced by bile duct ligation in 16 male Wistar rats; whereas 8 sham-operated rats were used as controls. Severity of cholestasis was assessed on histological examination of liver sections, and serum concentrations of albumin, AST, ALT, GGT, ALPK and bilirubin...
November 14, 2017: World Journal of Gastroenterology: WJG
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