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PQQ AND mitochondria

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https://www.readbyqxmd.com/read/26622336/biological-effects-of-pyrroloquinoline-quinone-on-liver-damage-in-bmi-1-knockout-mice
#1
Yuanqing Huang, Ning Chen, Dengshun Miao
Pyrroloquinoline quinone (PQQ) has been demonstrated to function as an antioxidant by scavenging free radicals and subsequently protecting the mitochondria from oxidative stress-induced damage. The aim of the present study was to investigate whether PQQ is able to rescue premature senescence in the liver, induced by the deletion of B cell-specific Moloney MLV insertion site-1 (Bmi-1), by inhibiting oxidative stress. In vivo, the mice were allocated into three groups that underwent the following treatment protocols...
August 2015: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/25843018/pyrroloquinoline-quinone-pqq-producing-escherichia-coli-nissle-1917-ecn-alleviates-age-associated-oxidative-stress-and-hyperlipidemia-and-improves-mitochondrial-function-in-ageing-rats
#2
Ashish Kumar Singh, Sumeet Kumar Pandey, Gourav Saha, Naresh Kumar Gattupalli
BACKGROUND: Ageing involves oxidative stress mediated by Reactive Oxygen Species (ROS) and mitochondrial dysfunction. The present work demonstrates the protective effect of PQQ producing EcN against rotenone induced mitochondrial oxidative stress and consequence of mitochondrial and cellular dysfunction in naturally ageing rat model. PQQ is a potent antioxidant molecule also known to stimulate mitochondrial biogenesis and function in mammals. METHODS: Firstly, adult rats (16-18 weeks old) were treated with rotenone (2...
June 2015: Experimental Gerontology
https://www.readbyqxmd.com/read/25820784/protective-effect-of-pyrroloquinoline-quinone-pqq-in-rat-model-of-intracerebral-hemorrhage
#3
Hongjian Lu, Jiabing Shen, Xinjian Song, Jianbin Ge, Rixin Cai, Aihua Dai, Zhongli Jiang
Pyrroloquinoline quinone (PQQ) has invoked considerable interest because of its presence in foods, antioxidant properties, cofactor of dehydrogenase, and amine oxidase. Protective roles of PQQ in central nervous system diseases, such as experimental stroke and spinal cord injury models have been emerged. However, it is unclear whether intracerebral hemorrhage (ICH), as an acute devastating disease, can also benefit from PQQ in experimental conditions. Herein, we examined the possible effect of PQQ on neuronal functions following ICH in the adult rats...
October 2015: Cellular and Molecular Neurobiology
https://www.readbyqxmd.com/read/25609689/effects-of-dietary-pyrroloquinoline-quinone-disodium-on-growth-carcass-characteristics-redox-status-and-mitochondria-metabolism-in-broilers
#4
RANDOMIZED CONTROLLED TRIAL
J Wang, H J Zhang, K G Samuel, C Long, S G Wu, H Y Yue, L L Sun, G H Qi
The potential benefits of supplementing pyrroloquinoline quinone disodium (PQQ·Na2) in the diet of broiler chicks were explored. We first examined the effect of different levels of dietary PQQ·Na2 on growth performance, carcass characteristics, and plasma biochemical parameters (trial 1). A total of 490 1-day-old male Arbor Acres (AA) broiler chicks were randomly divided into 5 dietary groups supplemented with 0, 0.05, 0.1, 0.2, or 0.4 mg PQQ·Na2/kg feed. As the 0.2 mg/kg PQQ·Na2 supplement gave the best performance, we then investigated whether this level of PQQ·Na2 influenced the redox status of plasma samples and mitochondrial-related metabolism (trial 2)...
February 2015: Poultry Science
https://www.readbyqxmd.com/read/25349108/pyrroloquinoline-quinone-protects-nucleus-pulposus-cells-from-hydrogen-peroxide-induced-apoptosis-by-inhibiting-the-mitochondria-mediated-pathway
#5
Lianjun Yang, Zijie Rong, Mingjun Zeng, Yanlin Cao, Xumeng Gong, Lijun Lin, Yong Chen, Wei Cao, Lixin Zhu, Weiren Dong
PURPOSE: Intervertebral disc cell apoptosis has been suggested to play a key role in promoting disc degeneration, and many studies have shown that the mechanism may be related to oxidative stress. Pyrroloquinoline quinone (PQQ), a redox cofactor for bacterial dehydrogenases, possesses the potential to scavenge reactive oxygen species (ROS) and inhibit cell apoptosis. The objective of this study was to evaluate the effects of PQQ on cultured rat nucleus pulposus (NP) cells under conditions of oxidative injury induced by hydrogen peroxide (H2O2) and to investigate the underlying mechanisms in vitro...
August 2015: European Spine Journal
https://www.readbyqxmd.com/read/25283505/pyrroloquinoline-quinone-protects-mouse-brain-endothelial-cells-from-high-glucose-induced-damage-in-vitro
#6
Zhong Wang, Guo-qiang Chen, Gui-ping Yu, Chang-jian Liu
AIM: To investigate the effects of pyrroloquinoline quinone (PQQ), an oxidoreductase cofactor, on high glucose-induced mouse endothelial cell damage in vitro. METHODS: Mouse brain microvascular endothelial bEND.3 cells were exposed to different glucose concentrations (5.56, 25 and 40 mmol/L) for 24 or 48 h. The cell viability was examined using MTT assay. Flow cytometry was used to analyze the apoptosis and ROS levels in the cells. MitoTracker Green staining was used to examine the mitochondria numbers in the cells...
November 2014: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/24755484/involvement-of-erk1-2-pathway-in-neuroprotective-effects-of-pyrroloquinoline-quinine-against-rotenone-induced-sh-sy5y-cell-injury
#7
Q Zhang, J Zhang, C Jiang, J Qin, K Ke, F Ding
Pyrroloquinoline quinone (PQQ), a redox cofactor in the mitochondrial respiratory chain, has been shown to protect neurons against glutamate-induced damage both in vitro and in vivo. In this study, specific inhibitors to each of the mitochondrial complexes were used to find out which reactive oxygen species (ROS)-generating sites could be affected by PQQ. Then we established an in vitro model of Parkinson's disease (PD) by exposing cultured SH-SY5Y dopaminergic cells to rotenone, a complex I inhibitor. The neuroprotective effects of PQQ were observed by pretreatment of SH-SY5Y cells with PQQ before rotenone injury, and the possible involvement of certain signaling pathways were investigated...
June 13, 2014: Neuroscience
https://www.readbyqxmd.com/read/24231099/dietary-pyrroloquinoline-quinone-pqq-alters-indicators-of-inflammation-and-mitochondrial-related-metabolism-in-human-subjects
#8
Calliandra B Harris, Winyoo Chowanadisai, Darya O Mishchuk, Mike A Satre, Carolyn M Slupsky, Robert B Rucker
Pyrroloquinoline quinone (PQQ) influences energy-related metabolism and neurologic functions in animals. The mechanism of action involves interactions with cell signaling pathways and mitochondrial function. However, little is known about the response to PQQ in humans. Using a crossover study design, 10 subjects (5 females, 5 males) ingested PQQ added to a fruit-flavored drink in two separate studies. In study 1, PQQ was given in a single dose (0.2 mg PQQ/kg). Multiple measurements of plasma and urine PQQ levels and changes in antioxidant potential [based on total peroxyl radical-trapping potential and thiobarbituric acid reactive product (TBAR) assays] were made throughout the period of 48 h...
December 2013: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/21814553/altering-pyrroloquinoline-quinone-nutritional-status-modulates-mitochondrial-lipid-and-energy-metabolism-in-rats
#9
Kathryn Bauerly, Calliandra Harris, Winyoo Chowanadisai, James Graham, Peter J Havel, Eskouhie Tchaparian, Mike Satre, Joel S Karliner, Robert B Rucker
We have reported that pyrroloquinoline quinone (PQQ) improves reproduction, neonatal development, and mitochondrial function in animals by mechanisms that involve mitochondrial related cell signaling pathways. To extend these observations, the influence of PQQ on energy and lipid relationships and apparent protection against ischemia reperfusion injury are described herein. Sprague-Dawley rats were fed a nutritionally complete diet with PQQ added at either 0 (PQQ-) or 2 mg PQQ/Kg diet (PQQ+). Measurements included: 1) serum glucose and insulin, 2) total energy expenditure per metabolic body size (Wt(3/4)), 3) respiratory quotients (in the fed and fasted states), 4) changes in plasma lipids, 5) the relative mitochondrial amount in liver and heart, and 6) indices related to cardiac ischemia...
2011: PloS One
https://www.readbyqxmd.com/read/19861415/pyrroloquinoline-quinone-stimulates-mitochondrial-biogenesis-through-camp-response-element-binding-protein-phosphorylation-and-increased-pgc-1alpha-expression
#10
Winyoo Chowanadisai, Kathryn A Bauerly, Eskouhie Tchaparian, Alice Wong, Gino A Cortopassi, Robert B Rucker
Bioactive compounds reported to stimulate mitochondrial biogenesis are linked to many health benefits such increased longevity, improved energy utilization, and protection from reactive oxygen species. Previously studies have shown that mice and rats fed diets lacking in pyrroloquinoline quinone (PQQ) have reduced mitochondrial content. Therefore, we hypothesized that PQQ can induce mitochondrial biogenesis in mouse hepatocytes. Exposure of mouse Hepa1-6 cells to 10-30 microm PQQ for 24-48 h resulted in increased citrate synthase and cytochrome c oxidase activity, Mitotracker staining, mitochondrial DNA content, and cellular oxygen respiration...
January 1, 2010: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/17880922/pyrroloquinoline-quinone-preserves-mitochondrial-function-and-prevents-oxidative-injury-in-adult-rat-cardiac-myocytes
#11
Rong Tao, Joel S Karliner, Ursula Simonis, Jie Zheng, Jianqing Zhang, Norman Honbo, Conrad C Alano
We investigated the ability of pyrroloquinoline quinone (PQQ) to confer resistance to acute oxidative stress in freshly isolated adult male rat cardiomyocytes. Fluorescence microscopy was used to detect generation of reactive oxygen species (ROS) and mitochondrial membrane potential (Deltapsi(m)) depolarization induced by hydrogen peroxide. H(2)O(2) caused substantial cell death, which was significantly reduced by preincubation with PQQ. H(2)O(2) also caused an increase in cellular ROS levels as detected by the fluorescent indicators CM-H2XRos and dihydroethidium...
November 16, 2007: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/17029795/pyrroloquinoline-quinone-nutritional-status-alters-lysine-metabolism-and-modulates-mitochondrial-dna-content-in-the-mouse-and-rat
#12
K A Bauerly, D H Storms, C B Harris, S Hajizadeh, M Y Sun, C P Cheung, M A Satre, A J Fascetti, E Tchaparian, R B Rucker
Pyrroloquinoline quinone (PQQ) added to purified diets devoid of PQQ improves indices of perinatal development in rats and mice. Herein, PQQ nutritional status and lysine metabolism are described, prompted by a report that PQQ functions as a vitamin-like enzymatic cofactor important in lysine metabolism (Nature 422 [2003] 832). Alternatively, we propose that PQQ influences lysine metabolism, but by mechanisms that more likely involve changes in mitochondrial content. PQQ deprivation in both rats and mice resulted in a decrease in mitochondrial content...
November 2006: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/16891289/comparison-of-pyrroloquinoline-quinone-and-or-metoprolol-on-myocardial-infarct-size-and-mitochondrial-damage-in-a-rat-model-of-ischemia-reperfusion-injury
#13
COMPARATIVE STUDY
Bo-qing Zhu, Ursula Simonis, Gary Cecchini, Hui-zhong Zhou, Luyi Li, John R Teerlink, Joel S Karliner
The cardioprotective effectiveness of low-dose pyrroloquinoline quinone (PQQ, 3 mg/kg) was compared with metoprolol, a beta(1)-selective adrenoceptor antagonist. Rats underwent 30 minutes of left anterior descending coronary artery occlusion and 2 hours of reperfusion. Metoprolol and/or PQQ were given at the onset of reperfusion to mimic clinical treatment. Metoprolol and/or PQQ reduced infarct size and protected against ischemia-induced left ventricular dysfunction after 2 hours of reperfusion. Combined therapy augmented left ventricular developed pressure at the end of reperfusion...
June 2006: Journal of Cardiovascular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/16424117/pyrroloquinoline-quinone-modulates-mitochondrial-quantity-and-function-in-mice
#14
Tracy Stites, David Storms, Kathryn Bauerly, James Mah, Calliandra Harris, Andrea Fascetti, Quinton Rogers, Eskouhie Tchaparian, Michael Satre, Robert B Rucker
When pyrroloquinoline quinone (PQQ) is added to an amino acid-based, but otherwise nutritionally complete basal diet, it improves growth-related variables in young mice. We examined PQQ and mitochondrial function based on observations that PQQ deficiency results in elevated plasma glucose concentrations in young mice, and PQQ addition stimulates mitochondrial complex 1 activity in vitro. PQQ-deficient weanling mice had a 20-30% reduction in the relative amount of mitochondria in liver; lower respiratory control ratios, and lower respiratory quotients than PQQ-supplemented mice (2 mg PQQ/kg diet)...
February 2006: Journal of Nutrition
https://www.readbyqxmd.com/read/12473380/antioxidant-and-pro-oxidant-properties-of-pyrroloquinoline-quinone-pqq-implications-for-its-function-in-biological-systems
#15
Kai He, Hitoshi Nukada, Teiji Urakami, Michael P Murphy
Pyrroloquinoline quinone (PQQ) is a novel redox cofactor recently found in human milk. It has been reported to function as an essential nutrient, antioxidant and redox modulator in cell culture experiments and in animal models of human diseases. As mitochondria are particularly susceptible to oxidative damage we studied the antioxidant properties of PQQ in isolated rat liver mitochondria. PQQ was an effective antioxidant protecting mitochondria against oxidative stress-induced lipid peroxidation, protein carbonyl formation and inactivation of the mitochondrial respiratory chain...
January 1, 2003: Biochemical Pharmacology
https://www.readbyqxmd.com/read/11716357/enzymes-in-pancreatic-islets-that-use-nadp-h-as-a-cofactor-including-evidence-for-a-plasma-membrane-aldehyde-reductase
#16
M Laclau, F Lu, M J MacDonald
Recent evidence of a pyruvate malate shuttle capable of transporting a large amount of NADPH equivalents out of mitochondria in pancreatic islets suggests that cytosolic NADP(H) plays a role in beta cell metabolism. To obtain clues about these processes the activities of several NADPH-utilizing enzymes were estimated in pancreatic islets. Low levels of pyrroquinolone quinone (PQQ) and low levels of enzyme activity that reduce PQQ were found in islets. Low activities of palmitoyl-CoA and stearoyl-CoA desaturases were also detected...
September 2001: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/1526276/interaction-of-thioredoxin-with-oxidized-aminobutyrate-aminotransferase-evidence-for-the-formation-of-a-covalent-intermediate
#17
J Park, J E Churchich
Pig brain 4-aminobutyrate aminotransferase is inactivated by pre-incubation with pyrroloquinoline quinone (2,7,9-tricarboxy-1H-pyrrolo[2,3,f]quinoline- 4,5-dione; PQQ) at pH 7. The reaction of approximately 2 SH residues/dimer is sufficient to inactivate the enzyme. Reoxidized aminotransferase is reactivated by E. coli thioredoxin. Similar results were obtained with E. coli 4-aminobutyrate aminotransferase. The spectroscopic properties of thioredoxin, tagged with the fluorescence probe, anthraniloyl, were used to monitor its interaction with re-oxidized 4-aminobutyrate aminotransferase...
September 21, 1992: FEBS Letters
https://www.readbyqxmd.com/read/1304921/characteristics-of-murine-protoporphyrinogen-oxidase
#18
K L Proulx, H A Dailey
Protoporphyrinogen oxidase (EC 1.3.3.4) (PPO) is the penultimate enzyme of the heme biosynthetic pathway. Mouse PPO has been purified in low yield and kinetically characterized by this laboratory previously. A new more rapid purification procedure is described herein, and with this protein we detect a noncovalently bound flavin moiety. This flavin is present at approximately stoichiometric amounts in the purified enzyme and has been identified by its fluorescence spectrum and high performance liquid chromatography as flavin mononucleotide (FMN)...
June 1992: Protein Science: a Publication of the Protein Society
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