keyword
MENU ▼
Read by QxMD icon Read
search

Cellular respiration

keyword
https://www.readbyqxmd.com/read/27933490/alterations-in-the-cerebral-microvascular-proteome-expression-profile-after-transient-global-cerebral-ischemia-in-rat
#1
Stine Spray, Sara E Johansson, Alistair V G Edwards, Martin R Larsen, Aneta Radziwon-Balicka, Gro K Povlsen, Lars Edvinsson
This study aimed at obtaining an in-depth mapping of expressional changes of the cerebral microvasculature after transient global cerebral ischemia (GCI) and the impact on these GCI-induced expressional changes of post-GCI treatment with a mitogen-activated protein kinase kinase (MEK1/2) inhibitor. GCI was induced in male Wistar rats followed by treatment with either vehicle or the MEK1/2 inhibitor U0126 every 12 h post-GCI. Seventy-two hours after GCI or sham surgery, the cerebral microvasculature was isolated and the protein content analysed with state-of-the-art mass spectrometry...
December 8, 2016: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/27924826/iron-chelators-target-both-proliferating-and-quiescent-cancer-cells
#2
Mårten Fryknäs, Xiaonan Zhang, Ulf Bremberg, Wojciech Senkowski, Maria Hägg Olofsson, Peter Brandt, Ingmar Persson, Padraig D'Arcy, Joachim Gullbo, Peter Nygren, Leoni Kunz Schughart, Stig Linder, Rolf Larsson
Poorly vascularized areas of solid tumors contain quiescent cell populations that are resistant to cell cycle-active cancer drugs. The compound VLX600 was recently identified to target quiescent tumor cells and to inhibit mitochondrial respiration. We here performed gene expression analysis in order to characterize the cellular response to VLX600. The compound-specific signature of VLX600 revealed a striking similarity to signatures generated by compounds known to chelate iron. Validation experiments including addition of ferrous and ferric iron in excess, EXAFS measurements, and structure activity relationship analyses showed that VLX600 chelates iron and supported the hypothesis that the biological effects of this compound is due to iron chelation...
December 7, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27922186/characterization-of-the-pro-inflammatory-cytokine-il-1%C3%AE-on-butyrate-oxidation-in-colorectal-cancer-cells
#3
Megan Johnstone, Natalie Bennett, Cynthia Standifer, Alexis Smith, Anna Han, Ahmed Bettaieb, Jay Whelan, Dallas R Donohoe
Cancer, in part, is driven, by alterations in cellular metabolism that promote cell survival and cell proliferation. Identifying factors that influence this shift in cellular metabolism in cancer cells is important. Interleukin-1β (IL-1β) is a pro-inflammatory cytokine that has been reported to be elevated in colorectal cancer patients. While much is known towards the effect of dietary nutrients on regulating inflammation and the inflammatory response, which includes cytokines such as IL-1β, far less is understood how cytokines impact nutrient fate to alter cancer cell metabolism...
December 6, 2016: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/27921179/activation-of-dioxygen-by-copper-metalloproteins-and-insights-from-model-complexes
#4
REVIEW
David A Quist, Daniel E Diaz, Jeffrey J Liu, Kenneth D Karlin
Nature uses dioxygen as a key oxidant in the transformation of biomolecules. Among the enzymes that are utilized for these reactions are copper-containing metalloenzymes, which are responsible for important biological functions such as the regulation of neurotransmitters, dioxygen transport, and cellular respiration. Enzymatic and model system studies work in tandem in order to gain an understanding of the fundamental reductive activation of dioxygen by copper complexes. This review covers the most recent advancements in the structures, spectroscopy, and reaction mechanisms for dioxygen-activating copper proteins and relevant synthetic models thereof...
December 5, 2016: Journal of Biological Inorganic Chemistry: JBIC
https://www.readbyqxmd.com/read/27921142/intra-population-variability-of-ocean-acidification-impacts-on-the-physiology-of-baltic-blue-mussels-mytilus-edulis-integrating-tissue-and-organism-response
#5
L S Stapp, J Thomsen, H Schade, C Bock, F Melzner, H O Pörtner, G Lannig
Increased maintenance costs at cellular, and consequently organism level, are thought to be involved in shaping the sensitivity of marine calcifiers to ocean acidification (OA). Yet, knowledge of the capacity of marine calcifiers to undergo metabolic adaptation is sparse. In Kiel Fjord, blue mussels thrive despite periodically high seawater PCO2, making this population interesting for studying metabolic adaptation under OA. Consequently, we conducted a multi-generation experiment and compared physiological responses of F1 mussels from 'tolerant' and 'sensitive' families exposed to OA for 1 year...
December 5, 2016: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/27914986/identification-of-epigenetically-downregulated-tmem70-and-ube2e2-in-rat-liver-after-28-day-treatment-with-hepatocarcinogenic-thioacetamide-showing-gene-product-downregulation-in-hepatocellular-preneoplastic-and-neoplastic-lesions-produced-by-tumor-promotion
#6
Sayaka Mizukami, Atsunori Yafune, Yousuke Watanabe, Kota Nakajima, Meilan Jin, Toshinori Yoshida, Makoto Shibutani
The present study identified genes showing promoter region hypermethylation by CpG island microarrays in the liver of rats treated with hepatocarcinogen thioacetamide (TAA) for 28 days. Among 47 hypermethylated genes, Hist1h2aa, Tmem70, Ube2e2, and Slk were confirmed to show hypermethylation by methylation-specific polymerase chain reaction (PCR) and pyrosequencing analyses as well as downregulation of transcript levels by real-time reverse transcription-PCR analysis in the livers of rats treated with TAA. All gene products of the 4 selected genes showed decreased immunoreactivity forming negative liver cell foci in a subpopulation of glutathione S-transferase placental form (GST-P)(+) foci in TAA-promoted rat livers in a two-stage hepatocarcinogenesis model...
November 30, 2016: Toxicology Letters
https://www.readbyqxmd.com/read/27913209/abl2-kinase-phosphorylates-bi-organellar-regulator-mnrr1-in-mitochondria-stimulating-respiration
#7
Siddhesh Aras, Hassan Arrabi, Neeraja Purandare, Maik Hüttemann, John Kamholz, Stephan Züchner, Lawrence I Grossman
We previously showed that MNRR1 (Mitochondrial Nuclear Retrograde Regulator 1, also CHCHD2) functions in two subcellular compartments, displaying a different function in each. In the mitochondria it is a stress regulator of respiration that binds to cytochrome c oxidase (COX) whereas in the nucleus it is a transactivator of COX4I2 and other hypoxia-stimulated genes. We now show that binding of MNRR1 to COX is promoted by phosphorylation at tyrosine-99 and that this interaction stimulates respiration. We show that phosphorylation of MNRR1 takes place in mitochondria and is mediated by Abl2 kinase (ARG)...
November 29, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27912887/nephroprotective-effects-of-%C3%AE-bisabolol-against-ischemic-reperfusion-acute-kidney-injury
#8
Tiago Lima Sampaio, Ramon Róseo Paula Pessoa Bezerra de Menezes, Marcus Felipe Bezerra da Costa, Gdayllon Cavalcante Meneses, Mauren Cristina Villalta Arrieta, Adriano José Maia Chaves Filho, Glayciane Bezerra de Morais, Alexandre Braga Libório, Renata Sousa Alves, Janaína Serra Azul Monteiro Evangelista, Alice Maria Costa Martins
BACKGROUND: Ischemia/reperfusion (I/R) in kidney is commonly related to acute kidney injury (AKI), essentially through oxidative stress. (-)-α-Bisabolol is a sesquiterpene isolated from the essential oil of a variety of plants, including chamomile, which has important antioxidant activity. STUDY DESIGN: This study intends to evaluate the nephroprotective activity of (-)-α-bisabolol (Bis) in both in vivo and in vitro models of kidney I/R. METHODS: Male Wistar rats were submitted to right nephrectomy, followed by ischemia by clamping of the renal artery in the left kidney for 60min...
December 15, 2016: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/27911404/using-capillary-electrophoresis-to-quantify-organic-acids-from-plant-tissue-a-test-case-examining-coffea-arabica-seeds
#9
Michael Joe Vaughan, Ann Chanon, Joshua J Blakeslee
Carboxylic acids are organic acids containing one or more terminal carboxyl (COOH) functional groups. Short chain carboxylic acids (SCCAs; carboxylic acids containing three to six carbons), such as malate and citrate, are critical to the proper functioning of many biological systems, where they function in cellular respiration and can serve as indicators of cell health. In foods, organic acid content can have significant impact on taste, with increased SCCA levels resulting in a sour or "acid" taste. Because of this, methods for the rapid analysis of organic acid levels are of particular interest to the food and beverage industries...
November 12, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27911401/an-optimized-protocol-to-analyze-glycolysis-and-mitochondrial-respiration-in-lymphocytes
#10
Javier Traba, Pietro Miozzo, Billur Akkaya, Susan K Pierce, Munir Akkaya
Lymphocytes respond to a variety of stimuli by activating intracellular signaling pathways, which in turn leads to rapid cellular proliferation, migration and differentiation, and cytokine production. All of these events are tightly linked to the energy status of the cell, and therefore studying the energy-producing pathways may give clues about the overall functionality of these cells. The extracellular flux analyzer is a commonly used device for evaluating the performance of glycolysis and mitochondrial respiration in many cell types...
November 21, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27908232/iron-sulfur-clusters-in-mitochondrial-metabolism-multifaceted-roles-of-a-simple-cofactor
#11
REVIEW
Johnny Stiban, Minyoung So, Laurie S Kaguni
Iron-sulfur metabolism is essential for cellular function and is a key process in mitochondria. In this review, we focus on the structure and assembly of mitochondrial iron-sulfur clusters and their roles in various metabolic processes that occur in mitochondria. Iron-sulfur clusters are crucial in mitochondrial respiration, in which they are required for the assembly, stability, and function of respiratory complexes I, II, and III. They also serve important functions in the citric acid cycle, DNA metabolism, and apoptosis...
October 2016: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/27903433/cold-acclimation-allows-drosophila-flies-to-maintain-mitochondrial-functioning-under-cold-stress
#12
Hervé Colinet, David Renault, Damien Roussel
Environmental stress generally disturbs cellular homeostasis. Researchers have hypothesized that chilling injury is linked to a shortage of ATP. However, previous studies conducted on insects exposed to nonfreezing low temperatures presented conflicting results. In this study, we investigated the mitochondrial bioenergetics of Drosophila melanogaster flies exposed to chronic cold stress (4 °C). We assessed mitochondrial oxygen consumption while monitoring the rate of ATP synthesis at various times (0, 1, 2, and 3 days) during prolonged cold stress and at two assay temperatures (25 and 4 °C)...
November 27, 2016: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/27901646/the-time-dependent-health-and-biochemical-effects-in-rats-exposed-to-stainless-steel-welding-dust-and-its-soluble-form
#13
Tadeusz Halatek, Magdalena Stanislawska, Irena Kaminska, Malgorzata Cieslak, Radoslaw Swiercz, Wojciech Wasowicz
Welding processes that generate fumes containing toxic metals, such as hexavalent chromium (Cr(VI)), manganese (Mn), and nickel (Ni), have been implicated in lung injury, inflammation, and lung tumor promotion in animal models. The principal objective of this study was to determine the dynamics of toxic effects of inhalation exposure to morphologically rated welding dust from stainless steel welding and its soluble form in TSE System with a dynamic airflow. We assessed the pulmonary toxicity of welding dust in Wistar rats exposed to 60...
November 30, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27897991/the-double-role-of-p53-in-cancer-and-autoimmunity-and-its-potential-as-therapeutic-target
#14
REVIEW
Alessandra Fierabracci, Marsha Pellegrino
p53 is a sequence-specific short-lived transcription factor expressed at low concentrations in various tissues while it is upregulated in damaged, tumoral or inflamed tissue. In normally proliferating cells, p53 protein levels and function are tightly controlled by main regulators, i.e., MDM2 (mouse double minute 2) and MDM4 proteins. p53 plays an important role due to its ability to mediate tumor suppression. In addition to its importance as a tumor suppressor, p53 coordinates diverse cellular responses to stress and damage and plays an emerging role in various physiological processes, including fertility, cell metabolism, mitochondrial respiration, autophagy, cell adhesion, stem cell maintenance and development...
November 25, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27896136/attention-deficit-hyperactivity-disorder-suffers-from-mitochondrial-dysfunction
#15
Poonam Verma, Alpana Singh, Dominic Ngima Nthenge-Ngumbau, Usha Rajamma, Swagata Sinha, Kanchan Mukhopadhyay, Kochupurackal P Mohanakumar
BACKGROUND: Pathophysiology of attention-deficit hyperactivity disorder (ADHD) is not known, and therefore the present study investigated mitochondrial defects, if any in cybrids created from patients and control population. METHODS: To investigate mitochondrial pathology in ADHD, cybrids cell lines were created from ADHD probands and controls by fusing their platelets with ρ(0)-cells prepared from SH-SY5Y neuroblastoma cell line. Cellular respiration, oxidative stress, mitochondrial membrane potential and morphology were evaluated employing oxygraph, mitochondria-specific fluorescence staining and evaluation by FACS, and immunocytochemistry...
December 2016: BBA Clinical
https://www.readbyqxmd.com/read/27893995/combined-effects-of-cadmium-temperature-and-hypoxia-reoxygenation-on-mitochondrial-function-in-rainbow-trout-oncorhynchus-mykiss
#16
John O Onukwufor, Don Stevens, Collins Kamunde
Although aquatic organisms face multiple environmental stressors that may interact to alter adverse outcomes, our knowledge of stressor-stressor interaction on cellular function is limited. We investigated the combined effects of cadmium (Cd), hypoxia-reoxygenation (H-R) and temperature on mitochondrial function. Liver mitochondria from juvenile rainbow trout were exposed to Cd (0-20μM) and H-R (0 and 5min) at 5, 13 and 25°C followed by measurements of mitochondrial Cd load, volume, complex І active (A)↔deactive (D) transition, membrane potential, ROS release and ultrastructural changes...
November 18, 2016: Aquatic Toxicology
https://www.readbyqxmd.com/read/27888833/interaction-of-rat-alveolar-macrophages-with-dental-composite-dust
#17
K L Van Landuyt, S M Cokic, C Asbach, P Hoet, L Godderis, F X Reichl, B Van Meerbeek, A Vennemann, M Wiemann
BACKGROUND: Dental composites have become the standard filling material to restore teeth, but during the placement of these restorations, high amounts of respirable composite dust (<5 μm) including many nano-sized particles may be released in the breathing zone of the patient and dental operator. Here we tested the respirable fraction of several composite particles for their cytotoxic effect using an alveolar macrophage model system. ​METHODS: Composite dust was generated following a clinical protocol, and the dust particles were collected under sterile circumstances...
November 26, 2016: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/27888605/natural-antisense-transcripts-are-linked-to-the-modulation-of-mitochondrial-function-and-teliospore-dormancy-in-ustilago-maydis
#18
Lauren A Ostrowski, Barry J Saville
The basidiomycete smut fungus Ustilago maydis causes common smut of corn. This disease is spread through the production of teliospores, which are thick-walled dormant structures characterized by low rates of respiration and metabolism. Teliospores are formed when the fungus grows within the plant, and the morphological steps involved in their formation have been described, but the molecular events leading to dormancy are not known. In U. maydis, natural antisense transcripts (NATs) can function to alter gene expression and many NATs have increased levels in the teliospore...
November 26, 2016: Molecular Microbiology
https://www.readbyqxmd.com/read/27887640/functional-and-regulatory-profiling-of-energy-metabolism-in-fission-yeast
#19
Michal Malecki, Danny A Bitton, Maria Rodríguez-López, Charalampos Rallis, Noelia Garcia Calavia, Graeme C Smith, Jürg Bähler
BACKGROUND: The control of energy metabolism is fundamental for cell growth and function and anomalies in it are implicated in complex diseases and ageing. Metabolism in yeast cells can be manipulated by supplying different carbon sources: yeast grown on glucose rapidly proliferates by fermentation, analogous to tumour cells growing by aerobic glycolysis, whereas on non-fermentable carbon sources metabolism shifts towards respiration. RESULTS: We screened deletion libraries of fission yeast to identify over 200 genes required for respiratory growth...
November 25, 2016: Genome Biology
https://www.readbyqxmd.com/read/27883312/time-course-analysis-of-gene-expression-during-the-saccharomyces-cerevisiae-hypoxic-response
#20
Nasrine Bendjilali, Samuel MacLeon, Gurmannat Kalra, Stephen D Willis, A K M Nawshad Hossian, Erica Avery, Olivia Wojtowicz, Mark J Hickman
Many cells experience hypoxia, or low oxygen, and respond by dramatically altering gene expression. In the yeast S. cerevisiae, genes that respond are required for many oxygen-dependent cellular processes, such as respiration, biosynthesis and redox regulation. To more fully characterize the global response to hypoxia, we exposed yeast to hypoxic conditions, extracted RNA at different times and performed RNA-seq analysis. Time-course statistical analysis revealed hundreds of genes that changed expression by up to 550-fold...
November 9, 2016: G3: Genes—Genomes—Genetics
keyword
keyword
88413
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"