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https://www.readbyqxmd.com/read/29788265/gene-expression-profile-in-frontal-cortex-in-sporadic-frontotemporal-lobar-degeneration-tdp
#1
Pol Andrés-Benito, Ellen Gelpi, Mónica Povedano, Gabriel Santpere, Isidro Ferrer
Molecular alterations compromising key metabolic pathways are poorly understood in sporadic frontotemporal lobar degeneration with TDP-43 pathology (sFTLD-TDP). Whole-transcriptome array, RT-qPCR validation, gel electrophoresis, and Western blotting, and mitochondrial electron transport chain (ETC) activity were comparatively examined in frontal cortex (area 8) of 16 sFTLD-TDP cases and 14 controls. Assessment of 111 genes by RT-qPCR showed deregulation of 81 genes linked to neurotransmission and synapses, neuronal architecture, cytoskeleton of axons and dendrites, vesicle trafficking, purines, mitochondria, and energy metabolism in sFTLD-TDP...
May 19, 2018: Journal of Neuropathology and Experimental Neurology
https://www.readbyqxmd.com/read/29782700/nonionic-dendritic-and-carbohydrate-based-amphiphiles-self-assembly-and-transport-behavior
#2
Suchita Prasad, Katharina Achazi, Boris Schade, Rainer Haag, Sunil K Sharma
Herein, a new series of non-ionic dendritic and carbohydrate based amphiphiles is synthesized employing biocompatible starting materials and studied for supramolecular aggregate formation in aqueous solution. The dendritic amphiphiles 12 and 13 possessing poly(glycerol) [G2.0] as hydrophilic unit and C-10 and C-18 hydrophobic alkyl chains, respectively, exhibit low critical aggregation concentration (CAC) in the order of 10-5 m and hydrodynamic diameters in the 8-10 nm range and supplemented by cryogenic transmission electron microscopy...
May 21, 2018: Macromolecular Bioscience
https://www.readbyqxmd.com/read/29779216/glutamate-metabolism-in-cerebral-mitochondria-after-ischemia-and-post-ischemic-recovery-during-aging-relationships-with-brain-energy-metabolism
#3
Federica Ferrari, Antonella Gorini, Siegfried Hoyer, Roberto Federico Villa
Glutamate is involved in cerebral ischemic injury, but its role has not been completely clarified and studies are required to understand how minimize its detrimental effects, contemporarily boosting the positive ones. In fact, glutamate is not only a neurotransmitter, but primarily a key metabolite for brain bioenergetics. Thus, we investigated the relationships between glutamate and brain energy metabolism in an in vivo model of complete cerebral ischemia of 15 min and during post-ischemic recovery after 1, 24, 48, 72 and 96 hrs in 1 year- adult and 2 year-old aged rats...
May 20, 2018: Journal of Neurochemistry
https://www.readbyqxmd.com/read/29778689/network-analysis-of-a-proposed-exit-pathway-for-protons-to-the-p-side-of-cytochrome-c-oxidase
#4
Xiuhong Cai, Kamran Haider, Jianxun Lu, Slaven Radic, Chang Yun Son, Qiang Cui, M R Gunner
Cytochrome c Oxidase (CcO) reduces O2 , the terminal electron acceptor, to water in the aerobic respiration electron transport chain. The energy released by O2 reductions is stored by removing eight protons from the high pH, N-side, of the membrane with four used for chemistry in the active site and four pumped to the low pH, P-side. The proton transfers must occur along controllable proton pathways that prevent energy dissipating movement towards the N-side. The CcO N-side has well established D- and K-channels to deliver protons to the protein interior...
May 17, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29775797/functional-screening-of-selective-mitochondrial-inhibitors-of-plasmodium
#5
Maria G Gomez-Lorenzo, Ane Rodríguez-Alejandre, Sonia Moliner-Cubel, María Martínez-Hoyos, Noemí Bahamontes-Rosa, Rubén Gonzalez Del Rio, Carolina Ródenas, Jesús de la Fuente, Jose Luis Lavandera, Jose F García-Bustos, Alfonso Mendoza-Losana
Phenotypic screening has produced most of the new chemical entities currently in clinical development for malaria, plus many lead compounds active against Plasmodium falciparum asexual stages. However, lack of knowledge about the mode of action of these compounds delays and may even hamper their future development. Identifying the mode of action of the inhibitors greatly helps to prioritise compounds for further development as novel antimalarials. Here we describe a whole-cell method to detect inhibitors of the mitochondrial electron transport chain, using oxygen consumption as high throughput readout in 384-well plate format...
May 9, 2018: International Journal for Parasitology, Drugs and Drug Resistance
https://www.readbyqxmd.com/read/29767788/acute-maneb-exposure-significantly-alters-both-glycolysis-and-mitochondrial-function-in-neuroblastoma-cells
#6
Colin C Anderson, Stefanos Aivazidis, Crystal L Kuzyk, Abhilasha Jain, James R Roede
The pesticides paraquat (PQ) and maneb (MB) have been described as environmental risk factors for Parkinson's disease (PD), with mechanisms associated with mitochondrial dysfunction and reactive oxygen species (ROS) generation. A combined exposure of PQ and MB in murine models and neuroblastoma cells has been utilized to further advance understanding of the PD phenotype. MB acts as a redox modulator through alkylation of protein thiols and has been previously characterized to inhibit complex III of the electron transport chain (ETC) and uncouple the mitochondrial proton gradient...
May 14, 2018: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29767769/regulation-of-chlorophagy-during-photoinhibition-and-senescence-lessons-from-mitophagy
#7
Sakuya Nakamura, Masanori Izumi
Light energy is essential for photosynthetic energy production and plant growth. Chloroplasts in green tissues convert energy from sunlight into chemical energy via the electron transport chain. When the level of light energy exceeds the capacity of the photosynthetic apparatus, chloroplasts undergo a process known as photoinhibition. Since photoinhibition leads to the overaccumulation of reactive oxygen species (ROS) and the spreading of cell death, plants have developed multiple systems to protect chloroplasts from strong light...
May 14, 2018: Plant & Cell Physiology
https://www.readbyqxmd.com/read/29765861/mitochondrial-metabolism-mediated-regulation-of-adult-neurogenesis
#8
REVIEW
Ruth Beckervordersandforth
The life-long generation of new neurons from radial glia-like neural stem cells (NSCs) is achieved through a stereotypic developmental sequence that requires precise regulatory mechanisms to prevent exhaustion or uncontrolled growth of the stem cell pool. Cellular metabolism is the new kid on the block of adult neurogenesis research and the identity of stage-specific metabolic programs and their impact on neurogenesis turns out to be an emerging research topic in the field. Mitochondrial metabolism is best known for energy production but it contains a great deal more...
November 9, 2017: Brain Plasticity
https://www.readbyqxmd.com/read/29765528/metabolic-changes-associated-with-metformin-potentiates-bcl-2-inhibitor-venetoclax-and-cdk9-inhibitor-bay1143572-and-reduces-viability-of-lymphoma-cells
#9
Vineela Chukkapalli, Leo I Gordon, Parameswaran Venugopal, Jeffrey A Borgia, Reem Karmali
Metformin exerts direct anti-tumor effects by activating AMP-activated protein kinase (AMPK), a major sensor of cellular metabolism in cancer cells. This, in turn, inhibits pro-survival mTOR signaling. Metformin has also been shown to disrupt complex 1 of the mitochondrial electron transport chain. Here, we explored the lymphoma specific anti-tumor effects of metformin using Daudi (Burkitt), SUDHL-4 (germinal center diffuse large B-cell lymphoma; GC DLBCL), Jeko-1 (Mantle-cell lymphoma; MCL) and KPUM-UH1 (double hit DLBCL) cell lines...
April 20, 2018: Oncotarget
https://www.readbyqxmd.com/read/29761500/compositional-and-transcriptomic-analysis-associated-with-cuticle-lipid-production-on-rosette-and-inflorescence-stem-leaves-in-the-extremophyte-thellungiella-salsuginea
#10
Shuai Tang, Ningmei Chen, Buerbatu Song, Junqing He, Yijun Zhou, Matthew A Jenks, Xiaojing Xu
The plant cuticle is a complex structure composed primarily of wax and cutin, but also contains cutan, glycerolipids, phenolics, polysaccharides, and proteins. The cuticle plays an important protective role as barrier between plants and their environment. In this paper, 4-week old leaves produced either on the rosette or on the inflorescence stem of the model extremophyte Thellungiella salsuginea were examined using scanning electron microscopy, cuticle permeability assays, and chemical composition analysis...
May 14, 2018: Physiologia Plantarum
https://www.readbyqxmd.com/read/29755572/introducing-potential-key-proteins-and-pathways-in-human-laryngeal-cancer-a-system-biology-approach
#11
Hassan Peyvandi, Ali Asghar Peyvandi, Akram Safaei, Mona Zamanian Azodi, Mostafa Rezaei-Tavirani
The most common malignant neoplasm of the head and neck region is laryngeal cancer which presents a significant international health problem. The present study aims to screen potential proteins related to laryngeal cancer by network analysis to further understanding disease pathogenesis and biomarker discovery. Differentially expressed proteins were extracted from literatures of laryngeal cancer that compare proteome profiling of patient›s tissue with healthy controls. The PPI network analyzed for up and down regulated proteins with Cytoscape Version 3...
2018: Iranian Journal of Pharmaceutical Research: IJPR
https://www.readbyqxmd.com/read/29752896/wavelength-dependence-of-vasodilation-and-no-release-from-s-nitrosothiols-and-dinitrosyl-iron-complexes-by-far-red-near-infrared-light
#12
Agnes Keszler, Brian Lindemer, Neil Hogg, Dorothee Weihrauch, Nicole L Lohr
Far red/near infrared (R/NIR) energy is a novel therapy, but its mechanism of action is poorly characterized. Cytochrome c oxidase (Cco) of the mitochondrial electron transport chain is considered the primary photoacceptor for R/NIR to photolyze a putative heme nitrosyl in Cco to liberate free nitric oxide (NO). We previously observed R/NIR light directly liberates NO from nitrosylated hemoglobin and myoglobin, and recently suggested S-nitrosothiols (RSNO) and dinitrosyl iron complexes (DNIC) may be primary sources of R/NIR-mediated NO...
May 9, 2018: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29751215/a-docked-state-conformational-dynamics-model-to-explain-the-ionic-strength-dependence-of-fmn-heme-electron-transfer-in-nitric-oxide-synthase
#13
Andrei V Astashkin, Jinghui Li, Huayu Zheng, Yubin Miao, Changjian Feng
The FMN-heme interdomain electron transfer (IET) in nitric oxide synthase (NOS) is a key stage of the electron transport chain, which supplies the catalytic heme site(s) with the NADPH-derived electrons. While there is a recognition that this IET depends on both the electron tunneling and the conformational dynamics, the detailed mechanism remains unclear. In this work, the IET kinetics were measured by laser flash photolysis for a bidomain oxygenase/FMN (oxyFMN) construct of human inducible NOS (iNOS) over the ionic strength range from 0...
March 26, 2018: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/29750574/exercise-training-during-chemotherapy-preserves-skeletal-muscle-fiber-area-capillarization-and-mitochondrial-content-in-patients-with-breast-cancer
#14
Sara Mijwel, Daniele A Cardinale, Jessica Norrbom, Mark Chapman, Niklas Ivarsson, Yvonne Wengström, Carl Johan Sundberg, Helene Rundqvist
Exercise has been suggested to ameliorate the detrimental effects of chemotherapy on skeletal muscle. The aim of this study was to compare the effects of different exercise regimens with usual care on skeletal muscle morphology and mitochondrial markers in patients being treated with chemotherapy for breast cancer. Specifically, we compared moderate-intensity aerobic combined with high-intensity interval training (AT-HIIT) and resistance combined with high-intensity interval training (RT-HIIT) with usual care (UC)...
May 11, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29749475/mir-125a-induces-apoptosis-metabolism-disorder-and-migrationimpairment-in-pancreatic-cancer-cells-by-targeting-mfn2-related-mitochondrial-fission
#15
Lichao Pan, Lin Zhou, Weijia Yin, Jia Bai, Rong Liu
Mitochondrial fission is important for the development and progression of pancreatic cancer (PC). However, little is known regarding its role in pancreatic cancer apoptosis, metabolism and migration. In the current study, the mechanism by which mitochondrial fission modifies the biological characteristics of PC was explored. MicroRNA‑125a (miR‑125a) had the ability to inhibit mitochondrial fission and contributed to cellular survival. Suppressed mitochondrial fission led to a reduction in mitochondrial debris, preserved the mitochondrial membrane potential, inhibited mitochondrial permeability transition pore opening, ablated cytochrome c leakage into the cytoplasm and reduced the pro‑apoptotic protein contents, finally blocking mitochondria related apoptosis pathways...
April 26, 2018: International Journal of Oncology
https://www.readbyqxmd.com/read/29748128/the-effects-of-mitochondrial-inhibitors-on-ca-2-signalling-and-electrical-conductances-required-for-pacemaking-in-interstitial-cells-of-cajal-in-the-mouse-small-intestine
#16
Bernard T Drumm, Tae S Sung, Haifeng Zheng, Salah A Baker, Sang D Koh, Kenton M Sanders
Interstitial cells of Cajal (ICC-MY) are pacemakers that generate and propagate electrical slow waves in gastrointestinal (GI) muscles. Slow waves appear to be generated by the release of Ca2+ from intracellular stores and activation of Ca2+ -activated Cl- channels (Ano1). Conduction of slow waves to smooth muscle cells coordinates rhythmic contractions. Mitochondrial Ca2+ handling is currently thought to be critical for ICC pacemaking. Protonophores, inhibitors of the electron transport chain (FCCP, CCCP or antimycin) or mitochondrial Na+ /Ca2+ exchange blockers inhibited slow waves in several GI muscles...
February 1, 2018: Cell Calcium
https://www.readbyqxmd.com/read/29747392/suppression-of-external-nadph-dehydrogenase-ndb1-in-arabidopsis-thaliana-confers-improved-tolerance-to-ammonium-toxicity-via-efficient-glutathione-redox-metabolism
#17
Anna Podgórska, Monika Ostaszewska-Bugajska, Klaudia Borysiuk, Agata Tarnowska, Monika Jakubiak, Maria Burian, Allan G Rasmusson, Bożena Szal
Environmental stresses, including ammonium (NH₄⁺) nourishment, can damage key mitochondrial components through the production of surplus reactive oxygen species (ROS) in the mitochondrial electron transport chain. However, alternative electron pathways are significant for efficient reductant dissipation in mitochondria during ammonium nutrition. The aim of this study was to define the role of external NADPH-dehydrogenase (NDB1) during oxidative metabolism of NH₄⁺-fed plants. Most plant species grown with NH₄⁺ as the sole nitrogen source experience a condition known as “ammonium toxicity syndrome”...
May 9, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29740774/sirtuin-signaling-controls-mitochondrial-function-in-glycogen-storage-disease-type-ia
#18
Jun-Ho Cho, Goo-Young Kim, Brian C Mansfield, Janice Y Chou
Glycogen storage disease type Ia (GSD-Ia) deficient in glucose-6-phosphatase-α (G6Pase-α) is a metabolic disorder characterized by impaired glucose homeostasis and a long-term complication of hepatocellular adenoma/carcinoma (HCA/HCC). Mitochondrial dysfunction has been implicated in GSD-Ia but the underlying mechanism and its contribution to HCA/HCC development remain unclear. We have shown that hepatic G6Pase-α deficiency leads to downregulation of sirtuin 1 (SIRT1) signaling that underlies defective hepatic autophagy in GSD-Ia...
May 8, 2018: Journal of Inherited Metabolic Disease
https://www.readbyqxmd.com/read/29737160/a-wide-band-gap-polymer-with-a-deep-homo-level-enables-14-2-efficiency-in-polymer-solar-cells
#19
Sunsun Li, Long Ye, Wenchao Zhao, Hongping Yan, Bei Yang, Delong Liu, Wanning Li, Harald Ade, Jianhui Hou
To simultaneously achieve the low photon energy loss (Eloss) and the broad spectral response, the molecular design of the efficient wide band-gap (WBG) donor polymer with a deep HOMO level is of critical importance in fullerene-free polymer solar cells (PSCs). Herein, we developed a new benzodithiophene unit, i.e., DTBDT-EF and conducted systematic investigations on a WBG DTBDT-EF-based donor polymer, namely, PDTB-EF-T. Due to the synergistic electron-withdrawing effect of the fluorine atom and ester group, PDTB-EF-T exhibits higher oxidation potential, i...
May 8, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29733856/biogenesis-of-the-bc-1-complex-of-the-mitochondrial-respiratory-chain
#20
REVIEW
Mama Ndi, Lorena Marin-Buera, Roger Salvatori, Abeer Prakash Singh, Martin Ott
The oxidative phosphorylation system contains four respiratory chain complexes that connect the transport of electrons to oxygen with the establishment of an electrochemical gradient over the inner membrane for ATP synthesis. Due to the dual genetic source of the respiratory chain subunits, its assembly requires a tight coordination between nuclear and mitochondrial gene expression machineries. In addition, dedicated assembly factors support the step-by-step addition of catalytic and accessory subunits as well as the acquisition of redox cofactors...
May 4, 2018: Journal of Molecular Biology
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