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Succinate dehydrogenase

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https://www.readbyqxmd.com/read/29792171/embryonic-transcriptome-and-proteome-analyses-on-hepatic-lipid-metabolism-in-chickens-divergently-selected-for-abdominal-fat-content
#1
Wei Na, Yuan-Yuan Wu, Peng-Fei Gong, Chun-Yan Wu, Bo-Han Cheng, Yu-Xiang Wang, Ning Wang, Zhi-Qiang Du, Hui Li
BACKGROUND: In avian species, liver is the main site of de novo lipogenesis, and hepatic lipid metabolism relates closely to adipose fat deposition. Using our fat and lean chicken lines of striking differences in abdominal fat content, post-hatch lipid metabolism in both liver and adipose tissues has been studied extensively. However, whether molecular discrepancy for hepatic lipid metabolism exists in chicken embryos remains obscure. RESULTS: We performed transcriptome and proteome profiling on chicken livers at five embryonic stages (E7, E12, E14, E17 and E21) between the fat and lean chicken lines...
May 23, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29784770/tlr-activated-repression-of-fe-s-cluster-biogenesis-drives-a-metabolic-shift-and-alters-histone-and-tubulin-acetylation
#2
Wing-Hang Tong, Nunziata Maio, De-Liang Zhang, Erika M Palmieri, Hayden Ollivierre, Manik C Ghosh, Daniel W McVicar, Tracey A Rouault
Given the essential roles of iron-sulfur (Fe-S) cofactors in mediating electron transfer in the mitochondrial respiratory chain and supporting heme biosynthesis, mitochondrial dysfunction is a common feature in a growing list of human Fe-S cluster biogenesis disorders, including Friedreich ataxia and GLRX5-related sideroblastic anemia. Here, our studies showed that restriction of Fe-S cluster biogenesis not only compromised mitochondrial oxidative metabolism but also resulted in decreased overall histone acetylation and increased H3K9me3 levels in the nucleus and increased acetylation of α-tubulin in the cytosol by decreasing the lipoylation of the pyruvate dehydrogenase complex, decreasing levels of succinate dehydrogenase and the histone acetyltransferase ELP3, and increasing levels of the tubulin acetyltransferase MEC17...
May 22, 2018: Blood Advances
https://www.readbyqxmd.com/read/29780328/contractile-activity-is-necessary-to-trigger-intermittent-hypobaric-hypoxia-induced-fiber-size-and-vascular-adaptations-in-skeletal-muscle
#3
David Rizo-Roca, Jèssica B Bonet, Büsra Ínal, Juan Gabriel Ríos-Kristjánsson, Teresa Pagès, Ginés Viscor, Joan R Torrella
Altitude training has become increasingly popular in recent decades. Its central and peripheral effects are well-described; however, few studies have analyzed the effects of intermittent hypobaric hypoxia (IHH) alone on skeletal muscle morphofunctionality. Here, we studied the effects of IHH on different myofiber morphofunctional parameters, investigating whether contractile activity is required to elicit hypoxia-induced adaptations in trained rats. Eighteen male Sprague-Dawley rats were trained 1 month and then divided into three groups: (1) rats in normobaria (trained normobaric inactive, TNI); (2) rats subjected daily to a 4-h exposure to hypobaric hypoxia equivalent to 4,000 m (trained hypobaric inactive, THI); and (3) rats subjected daily to a 4-h exposure to hypobaric hypoxia just before performing light exercise (trained hypobaric active, THA)...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29777685/thiamine-preserves-mitochondrial-function-in-a-rat-model-of-traumatic-brain-injury-preventing-inactivation-of-the-2-oxoglutarate-dehydrogenase-complex
#4
Garik V Mkrtchyan, Muammer Üçal, Andrea Müllebner, Sergiu Dumitrescu, Martina Kames, Rudolf Moldzio, Marek Molcanyi, Samuel Schaefer, Adelheid Weidinger, Ute Schaefer, Juergen Hescheler, Johanna Catharina Duvigneau, Heinz Redl, Victoria I Bunik, Andrey V Kozlov
BACKGROUND AND PURPOSE: Based on the fact that traumatic brain injury is associated with mitochondrial dysfunction we aimed at localization of mitochondrial defect and attempted to correct it by thiamine. EXPERIMENTAL APPROACH: Interventional controlled experimental animal study was used. Adult male Sprague-Dawley rats were subjected to lateral fluid percussion traumatic brain injury. Thiamine was administered 1 h prior to trauma; cortex was extracted for analysis 4 h and 3 d after trauma...
May 16, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29758875/thifluzamide-affects-lipid-metabolism-in-zebrafish-danio-reio
#5
Yang Yang, Fengshou Dong, Xingang Liu, Jun Xu, Xiaohu Wu, Suzhen Qi, Wenxian Liu, Yongquan Zheng
Thifluzamide, a succinate dehydrogenase inhibitor (SDHI) fungicide, has been widely used in rice fields throughout the world and causes hepatotoxicity in zebrafish (Danio reio). This study was conducted to investigate the effect of thifluzamide on lipid metabolism in zebrafish after exposure to a control or, 0.019, 0.19, or 1.90mg/L thifluzamide for 28days. Following exposure, pathological changes in the liver were evaluated. Total cholesterol (TCHO) level, and triglyceride (TG) levels as well as hepatic lipase (HL), lipoprotein lipase (LPL), fatty acid synthetase (FAS) and carnitine palmitoyltransferase (CPT-I) activities were measured...
August 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29753025/identification-and-efficacy-of-glycine-serine-and-threonine-metabolism-in-potentiating-kanamycin-mediated-killing-of-edwardsiella-piscicida
#6
Jin-Zhou Ye, Xiang-Min Lin, Zhi-Xue Cheng, Yu-Bin Su, Wan-Xin Li, Far-Man Ali, Jun Zheng, Bo Peng
We previously showed that glucose potentiated kanamycin to kill multidrug-resistant Edwardsiella piscicida through activation of the TCA cycle. However, whether other regulatory mechanism is involved requires further investigation. By quantitative proteomics technology, iTRAQ, we systematically mapped the altered proteins in the presence of glucose and identified 94 differentially expressed proteins. The analysis of the altered proteins by pathways, amino acid biosynthesis and metabolism were enriched. And the most significantly altered eight amino acids tyrosine, phenylalanine, valine, leucine, isoleucine, glycine, serine and threonine were investigated for their potentiation of kanamycin to kill EIB202, where glycine, serine and threonine showed the strongest efficacy than the others...
May 9, 2018: Journal of Proteomics
https://www.readbyqxmd.com/read/29746885/curcumin-inhibits-hepatic-stellate-cell-activation-via-suppression-of-succinate-associated-hif-1%C3%AE-induction
#7
Linlin She, Dan Xu, Zixia Wang, Yirui Zhang, Qingli Wei, Jiye Aa, Guangji Wang, Baolin Liu, Yuan Xie
PURPOSE: Aberrant succinate accumulation emerges as a unifying mechanism for inflammation and oxidative stress. This study aims to investigate whether curcumin ameliorates hepatic fibrosis via blocking succinate signaling. METHODS: We investigated the effects of curcumin on hepatic succinate accumulation and liver fibrosis in mice fed a high-fat diet (HFD). Meanwhile, we stimulated mouse primary hepatic stellate cells (HSCs) with succinate and observed the inhibitory effects of curcumin on succinate signaling...
May 7, 2018: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/29734522/a-selective-determination-of-the-catalytic-cysteine-pk-a-of-2-cysteine-succinic-semialdehyde-dehydrogenase-from-acinetobacter-baumannii-using-burst-kinetics-and-enzyme-adduct-formation
#8
Jittima Phonbuppha, Somchart Maenpuen, Pobthum Munkajohnpong, Pimchai Chaiyen, Ruchanok Tinikul
Succinic semialdehyde dehydrogenase from Acinetobacter baumannii (AbSSADH) catalyzes the oxidation of succinic semialdehyde. This enzyme has two conserved cysteines (Cys289 and Cys291) and prefers to use NADP+ over NAD+ as a hydride acceptor. Steady-state kinetic analysis showed that AbSSADH has the highest catalytic turnover (137 s-1 ) and can tolerate SSA inhibition the most (<500 μM) among all SSADHs reported. Alanine substitutions of the two conserved cysteines indicated that Cys291Ala has ~65% activity compared to the wild-type enzyme while Cys289Ala is inactive, suggesting that Cys289 is the active residue participating in catalysis...
May 7, 2018: FEBS Journal
https://www.readbyqxmd.com/read/29729330/paraoxonase-2-prevents-the-development-of-heart-failure
#9
Wei Li, David Kennedy, Zhili Shao, Xi Wang, Andre Klaassen Kamdar, Malory Weber, Kayla Mislick, Kathryn Kiefer, Rommel Morales, Brendan Agatisa-Boyle, Diana M Shih, Srinivasa T Reddy, Christine S Moravec, W H Wilson Tang
BACKGROUND: Mitochondrial oxidation is a major source of reactive oxygen species (ROS) and mitochondrial dysfunction plays a central role in development of heart failure (HF). Paraoxonase 2 deficient (PON2-def) mitochondria are impaired in function. In this study, we tested whether PON2-def aggravates HF progression. METHODS AND RESULTS: Using qPCR, immunoblotting and lactonase activity assay, we demonstrate that PON2 activity was significantly decreased in failing hearts despite increased PON2 expression...
May 2, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29720885/successful-second-line-metronomic-temozolomide-in-metastatic-paraganglioma-case-reports-and-review-of-the-literature
#10
Isabel Tena, Garima Gupta, Marcos Tajahuerce, Marta Benavent, Manuel Cifrián, Alejandro Falcon, María Fonfria, Maribel Del Olmo, Rosa Reboll, Antonio Conde, Francisca Moreno, Julia Balaguer, Adela Cañete, Rosana Palasí, Pilar Bello, Alfredo Marco, José Luis Ponce, Juan Francisco Merino, Antonio Llombart, Alfredo Sanchez, Karel Pacak
Metastatic pheochromocytoma and paraganglioma (mPHEO/PGL) are frequently associated with succinate dehydrogenase B ( SDHB ) mutations. Cyclophosphamide-dacarbazine-vincristine (CVD) regimen is recommended as standard chemotherapy for advanced mPHEO/PGL. There is limited evidence to support the role of metronomic schemes (MS) of chemotherapy in mPHEO/PGL treatment. We report 2 patients with SDHB -related mPGL who received a regimen consisting of MS temozolomide (TMZ) and high-dose lanreotide after progression on both CVD chemotherapy and high-dose lanreotide...
2018: Clinical Medicine Insights. Oncology
https://www.readbyqxmd.com/read/29720834/comparison-of-bran-processed-and-crude-atractylodes-lancea-effects-on-spleen-deficiency-syndrome-in-rats
#11
Dong-Hua Xue, Yu-Qiang Liu, Qian Cai, Ke Liang, Bing-Yuan Zheng, Fang-Xiao Li, Xue Pang
Background: The rhizome of Atractylodes lancea (AL) is usually used for the treatment of various diseases such as spleen deficiency syndrome (SDS). Both bran-processed and crude AL is included in Chinese Pharmacopoeia. The different efficacies of bran-processed and crude AL on SDS are largely unknown, and the mechanisms of AL effects have not been fully elucidated. Objective: The objective of the study was to compare the effects of bran-processed and crude AL and then assess the mechanisms of treating SDS...
April 2018: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29719735/impact-of-hypoxia-stress-on-the-physiological-responses-of-sea-cucumber-apostichopus-japonicus-respiration-digestion-immunity-and-oxidative-damage
#12
Da Huo, Lina Sun, Xiaoshang Ru, Libin Zhang, Chenggang Lin, Shilin Liu, Xiaoke Xin, Hongsheng Yang
Hypoxia is one of the most frequently occurring stressors confronted by industrial cultures of sea cucumber and can cause large economic losses and resource degradation. However, its responsive mechanisms are still lacking. In this paper, the physiological responses of Apostichopus japonicus to oxygen deficiency was illustrated, including induced oxidative response and immune defense and changed digestive enzymes activities. Significantly increased activities of alpha-amylase (AMS), acid phosphatase (ACP), lactate dehydrogenase, catalase, peroxidase, succinate dehydrogenase and higher content of malondialdehyde, and decreased activities of lipase and trypsin (TRY) were observed after hypoxia exposure (dissolved oxygen [DO] 2 mg/L)...
2018: PeerJ
https://www.readbyqxmd.com/read/29710216/association-of-dasatinib-with-progression-free-survival-among-patients-with-advanced-gastrointestinal-stromal-tumors-resistant-to-imatinib
#13
Scott M Schuetze, Vanessa Bolejack, Dafydd G Thomas, Margaret von Mehren, Shreyaskumar Patel, Brian Samuels, Edwin Choy, Gina D'Amato, Arthur P Staddon, Kristen N Ganjoo, Warren A Chow, Daniel A Rushing, Charles A Forscher, Dennis A Priebat, David M Loeb, Rashmi Chugh, Scott Okuno, Denise K Reinke, Laurence H Baker
Importance: Gastrointestinal stromal tumors (GISTs) are life-threatening when metastatic or not amenable to surgical removal. In a few patients with advanced GISTs refractory to imatinib mesylate, treatment with sunitinib malate followed by regorafenib provides tumor control; however, additional active treatments are needed for most patients. Objective: To evaluate the 6-month progression-free survival (PFS), tumor objective response, and overall survival rates in patients with GISTs treated with dasatinib...
April 26, 2018: JAMA Oncology
https://www.readbyqxmd.com/read/29702406/oxygen-dependence-of-mitochondrial-ros-production-as-detected-by-amplex-red-assay
#14
Vera G Grivennikova, Alexandra V Kareyeva, Andrei D Vinogradov
The initial rates of superoxide plus hydrogen peroxide (ROS) generation by intact or permeabilized rat heart mitochondria and coupled inside-out bovine heart submitochondrial particles (SMP) oxidizing NAD-dependent substrates, NADH, and succinate were measured by detecting resorufin formation in the Amplex Red assay at various oxygen concentrations. Linear dependences of the initial rates on oxygen concentration within the range of ~125-750 μM were found for all significant mitochondrial generators, i.e...
April 14, 2018: Redox Biology
https://www.readbyqxmd.com/read/29690663/-expression-of-succinate-dehydrogenase-subunit-protein-in-succinate-dehydrogenase-deficient-gastrointestinal-stromal-tumors
#15
Y J Zhang, Y H Cheng, L X Guo, N Q Wang, H Liu
Objective: To investigate the expression of succinate dehydrogenase complex subunit protein in succinate dehydrogenase-deficient gastrointestinal stromal tumors (SDH-deficient GISTs). Methods: Three hundred fifty-two cases of GISTs were collected from January 2003 to January 2017 at the Affiliated Hospital of Guizhou Medical University and West China Hospital of Sichuan University.The expression of succinate dehydrogenase subunit protein was detected by immunohistochemical EnVision technique in 352 cases of GISTs, and the negative cases were analyzed for clinicopathologic features and outcome...
April 8, 2018: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
https://www.readbyqxmd.com/read/29686076/elucidation-of-the-trigonelline-degradation-pathway-reveals-previously-undescribed-enzymes-and-metabolites
#16
Nadia Perchat, Pierre-Loïc Saaidi, Ekaterina Darii, Christine Pellé, Jean-Louis Petit, Marielle Besnard-Gonnet, Véronique de Berardinis, Maeva Dupont, Alexandra Gimbernat, Marcel Salanoubat, Cécile Fischer, Alain Perret
Trigonelline (TG; N- methylnicotinate) is a ubiquitous osmolyte. Although it is known that it can be degraded, the enzymes and metabolites have not been described so far. In this work, we challenged the laboratory model soil-borne, gram-negative bacterium Acinetobacter baylyi ADP1 (ADP1) for its ability to grow on TG and we identified a cluster of catabolic, transporter, and regulatory genes. We dissected the pathway to the level of enzymes and metabolites, and proceeded to in vitro reconstruction of the complete pathway by six purified proteins...
April 23, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29679350/alleviation-mechanisms-of-selenium-on-cadmium-spiked-in-chicken-ovarian-tissue-perspectives-from-autophagy-and-energy-metabolism
#17
Shuang Wang, Zhe Xu, Hang Yin, Yahong Min, Shu Li
Cadmium (Cd) is a kind of toxic heavy metal and it can cause damage to organs and tissues. Selenium (Se) can antagonize some metal element toxicity including Cd. The present study was designed to investigate Cd-induced damage to chicken ovary by autophagy and the protective mechanism of Se on Cd-induced damage. Administration of Cd for 12 weeks led to energy metabolism disorder of the chicken ovarian tissues, which resulted in autophagy. In addition, the mRNA expression of glucose-related genes including hexokinase II (HK2), pyruvate kinase (PK), pyruvate dehydrogenase complex (PDHX), and succinate dehydrogenase (SDH) and the activities of ATPase, including Na+ -K+ -ATPase, Ca2+ -ATPase, Mg2+ -ATPase, were all downregulated remarkably compared with the control...
April 21, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29678919/investigating-the-central-metabolism-of-clostridium-thermosuccinogenes
#18
Jeroen Girwar Koendjbiharie, Kilian Wiersma, Richard van Kranenburg
Clostridium thermosuccinogenes is a thermophilic anaerobic bacterium able to convert various carbohydrates to succinate and acetate as main fermentation products. Genomes of the four publicly available strains have been sequenced and the genome of the type-strain has been closed. The annotated genomes were used to reconstruct the central metabolism, and enzyme assays were used to validate annotations and to determine co-factor specificity. Genes for the pathways to all fermentation products were identified, as well as for the Embden-Meyerhof-Parnas pathway, and the pentose phosphate pathway...
April 20, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29658305/liver-antioxidant-and-aerobic-status-improves-after-metformin-and-melatonin-administration-in-a-rat-model-of-high-fat-diet-and-mammary-carcinogenesis
#19
Natalia Kurhaluk, Bianka Bojková, Pawel J Winklewski
Oxidative stress is involved in the development of various cancers. In the present study the effect of long-term administration of peroral antidiabetic metformin and pineal hormone melatonin on liver antioxidant and aerobic status in female Sprague-Dawley rats carrying mammary tumors induced by N-methyl-N-nitrosourea was evaluated. Both substances were administered in a preventive/curative manner (12 days before and 16 weeks after the carcinogen application). Carcinogen administration induced oxidative stress: the level of thiobarbituric acid reactive products (TBARS) as a marker of reactive oxygen species (ROS) generation in liver increased as well as the level of oxidatively modified protein content (OMP, aldehyde and ketone derivates)...
April 15, 2018: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/29644063/metabolic-adaptability-in-hexavalent-chromium-treated-renal-tissue-an-in-vivo-study
#20
Kanu Shil, Sudipta Pal
Background: Hexavalent chromium [Cr(VI)], an environmental pollutant that originates mostly from anthropogenic sources, is a serious threat to human health. After entering into cells, Cr(VI) is capable of producing excessive free radicals and causing tissue damage. The present study aims to reveal the toxic manifestation of Cr(VI) on the metabolic activity of renal tissue. Methods: Male Swiss albino mice were treated orally with potassium dichromate (K2 Cr2 O7 ) at a dose of 10 mg/kg body weight for a period of 30 days...
April 2018: Clinical Kidney Journal
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