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Journal of Bioenergetics and Biomembranes

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https://www.readbyqxmd.com/read/30415460/an-integrated-molecular-modeling-approach-for-the-tryptase-monomer-curcuminoid-recognition-analysis-conformational-and-bioenergetic-features
#1
Pathomwat Wongrattanakamon, Chadarat Ampasavate, Busaban Sirithunyalug, Supat Jiranusornkul
Human mast cell tryptase has been shown as an activating enzyme in matrix degradation process. The previous study suggest that tryptase either alone or in joining with activation of metalloproteinases, can associate in extra cellular matrix damage and the possible destruction of the basement membrane resulting in photoaging. Therefore the inhibition of tryptase activity is one of the most important therapeutic strategies against the photoaging. Curcumin has been shown to be a potential agent for preventing and/or treating the photoaging induced by UV radiation...
November 10, 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/30361824/pioglitazone-provides-beneficial-effect-in-metabolic-syndrome-rats-via-affecting-intracellular-na-dyshomeostasis
#2
Ayca Bilginoglu, Makbule Fulya Tutar Selcuk, Hilal Nakkas, Belma Turan
Metabolic syndrome, is associated impaired blood glucose level, insulin resistance, and dyslipidemia caused by abdominal obesity. Also, it is related with cardiovascular risk accumulation and cardiomyopathy. The hypothesis of this study was to examine the effect of thiazolidinediones such as pioglitazone on intracellular Na+ homeostasis in heart of metabolic syndrome male rats. Abdominal obesity and glucose intolerance had measured as a marker of metabolic syndrome. Intracellular Na+ concentration ([Na+ ]i ) at rest and [Na+ ]i during pacing with electrical field stimulation were determined in freshly isolated cardiomyocytes...
October 25, 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/30302619/low-survival-rate-of-young-adult-born-olfactory-sensory-neurons-in-the-undamaged-mouse-olfactory-epithelium
#3
Sajishnu P Savya, Tenzin Kunkhyen, Claire E J Cheetham
Olfactory sensory neurons (OSNs) are generated throughout life from progenitor cells in the olfactory epithelium. OSN axons project in an odorant receptor-specific manner to the olfactory bulb (OB), forming an ordered array of glomeruli where they provide sensory input to OB neurons. The tetracycline transactivator (tTA) system permits developmental stage-specific expression of reporter genes in OSNs and has been widely used for structural and functional studies of the development and plasticity of the mouse olfactory system...
October 9, 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/30215151/deafferentation-induced-alterations-in-mitral-cell-dendritic-morphology-in-the-adult-zebrafish-olfactory-bulb
#4
Joanna M Pozzuto, Cynthia L Fuller, Christine A Byrd-Jacobs
The removal of afferent input to the olfactory bulb by both cautery and chemical olfactory organ ablation in adult zebrafish results in a significant decrease in volume of the ipsilateral olfactory bulb. To examine the effects of deafferentation at a cellular level, primary output neurons of the olfactory bulb, the mitral cells, were investigated using retrograde tract tracing with fluorescent dextran using ex vivo brain cultures. Morphological characteristics including the number of major dendritic branches, total length of dendritic branches, area of the dendritic arbor, overall dendritic complexity, and optical density of the arbor were used to determine the effects of deafferentation on mitral cell dendrites...
September 13, 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/30203289/loss-of-odor-induced-c-fos-expression-of-juxtaglomerular-activity-following-maintenance-of-mice-on-fatty-diets
#5
Erminia Fardone, Arda B Celen, Nicholas A Schreiter, Nicolas Thiebaud, Melissa L Cooper, Debra Ann Fadool
Diet-induced obesity (DIO) decreases the number of OMP+ olfactory sensory neurons (OSN) in the olfactory epithelium by 25% and reduces correlate axonal projections to the olfactory bulb (OB). Whether surviving OSNs have equivalent odor responsivity is largely unknown. Herein, we utilized c-fos immediate-early gene expression to map neuronal activity and determine whether mice weaned to control (CF), moderately-high fat (MHF), or high-fat (HF) diet for a period of 6 months had changes in odor activation. Diet-challenged M72-IRES-tau-GFP mice were exposed to either a preferred M72 (Olfr160) ligand, isopropyl tiglate, or clean air in a custom-made Bell-jar infusion chamber using an alternating odor exposure pattern generated by a picosprizer™...
September 11, 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/30171506/aversive-learning-induced-plasticity-throughout-the-adult-mammalian-olfactory-system-insights-across-development
#6
REVIEW
Jordan M Ross, Max L Fletcher
Experiences, such as sensory learning, are known to induce plasticity in mammalian sensory systems. In recent years aversive olfactory learning-induced plasticity has been identified at all stages of the adult olfactory pathway; however, the underlying mechanisms have yet to be identified. Much of the work regarding mechanisms of olfactory associative learning comes from neonates, a time point before which the brain or olfactory system is fully developed. In addition, pups and adults often express different behavioral outcomes when subjected to the same olfactory aversive conditioning paradigm, making it difficult to directly attribute pup mechanisms of plasticity to adults...
August 31, 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/30267331/control-of-rotation-of-the-f-1-f-o-atp-synthase-nanomotor-by-an-inhibitory-%C3%AE-helix-from-unfolded-%C3%AE%C2%B5-or-intrinsically-disordered-%C3%AE-and-if-1-proteins
#7
REVIEW
Francisco Mendoza-Hoffmann, Mariel Zarco-Zavala, Raquel Ortega, José J García-Trejo
The ATP synthase is a ubiquitous nanomotor that fuels life by the synthesis of the chemical energy of ATP. In order to synthesize ATP, this enzyme is capable of rotating its central rotor in a reversible manner. In the clockwise (CW) direction, it functions as ATP synthase, while in counter clockwise (CCW) sense it functions as an proton pumping ATPase. In bacteria and mitochondria, there are two known canonical natural inhibitor proteins, namely the ε and IF1 subunits. These proteins regulate the CCW F1 FO -ATPase activity by blocking γ subunit rotation at the αDP /βDP /γ subunit interface in the F1 domain...
October 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/30187271/membranotropic-effects-of-%C3%AF-hydroxypalmitic-acid-and-ca-2-on-rat-liver-mitochondria-and-lecithin-liposomes-aggregation-and-membrane-permeabilization
#8
Mikhail V Dubinin, Victor N Samartsev, Anastasia E Stepanova, Ekaterina I Khoroshavina, Nikita V Penkov, Valery A Yashin, Vlada S Starinets, Irina B Mikheeva, Sergey V Gudkov, Konstantin N Belosludtsev
The paper examines membranotropic Ca2+ -dependent effects of ω-hydroxypalmitic acid (HPA), a product of ω-oxidation of fatty acids, on the isolated rat liver mitochondria and artificial membrane systems (liposomes). It was established that in the presence of Ca2+ , HPA induced aggregation of liver mitochondria, which was accompanied by the release of cytochrome c from the organelles. It was further demonstrated that the addition of Ca2+ to HPA-containing liposomes induced their aggregation and/or fusion. Ca2+ also caused the release of the fluorescent dye sulforhodamine B from liposomes, indicating their permeabilization...
October 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/30143916/altered-mitochondrial-oxidative-phosphorylation-capacity-in-horses-suffering-from-polysaccharide-storage-myopathy
#9
Irene Tosi, Tatiana Art, Dominique Cassart, Frédéric Farnir, Justine Ceusters, Didier Serteyn, Hélène Lemieux, Dominique-Marie Votion
Polysaccharide storage myopathy (PSSM) is a widely described cause of exertional rhabdomyolysis in horses. Mitochondria play a central role in cellular energetics and are involved in human glycogen storage diseases but their role has been overlooked in equine PSSM. We hypothesized that the mitochondrial function is impaired in the myofibers of PSSM-affected horses. Nine horses with a history of recurrent exercise-associated rhabdomyolysis were tested for the glycogen synthase 1 gene (GYS1) mutation: 5 were tested positive (PSSM group) and 4 were tested negative (horses suffering from rhabdomyolysis of unknown origin, RUO group)...
October 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/30136168/mitochondrial-nadh-redox-potential-impacts-the-reactive-oxygen-species-production-of-reverse-electron-transfer-through-complex-i
#10
Hervé Dubouchaud, Ludivine Walter, Michel Rigoulet, Cécile Batandier
There is substantial evidence that Reactive Oxygen Species (ROS) play a major part in cell functioning. Although their harmfulness through oxidative stress is well documented, their role in signaling and sensing as an oxidative signal still needs to be investigated. In most cells, the mitochondrial Electron Transport Chain (ETC) is the primary source of ROS. The production of ROS by reverse electron transfer through complex I has been demonstrated both in an experimental context but also in many pathophysiological situations...
October 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/30116920/membrane-potential-and-delta-ph-dependency-of-reverse-electron-transport-associated-hydrogen-peroxide-production-in-brain-and-heart-mitochondria
#11
Tímea Komlódi, Fanni F Geibl, Matilde Sassani, Attila Ambrus, László Tretter
Succinate-driven reverse electron transport (RET) is one of the main sources of mitochondrial reactive oxygen species (mtROS) in ischemia-reperfusion injury. RET is dependent on mitochondrial membrane potential (Δψm ) and transmembrane pH difference (ΔpH), components of the proton motive force (pmf); a decrease in Δψm and/or ΔpH inhibits RET. In this study we aimed to determine which component of the pmf displays the more dominant effect on RET-provoked ROS generation in isolated guinea pig brain and heart mitochondria respiring on succinate or α-glycerophosphate (α-GP)...
October 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/29943164/different-mitochondrial-response-to-cisplatin-and-hyperthermia-treatment-in-human-ags-caco-2-and-t3m4-cancer-cell-lines
#12
Sonata Trumbeckaite, Vaidotas Cesna, Aldona Jasukaitiene, Rasa Baniene, Antanas Gulbinas
Gastrointestinal cancers (gastric, pancreatic and colorectal) are life-threatening diseases, which easily spread to peritoneal cavity (Juhl et al. in Int J Cancer 57:330-335, 1994; Schneider et al. in Gastroenterology 128:1606-1625, 2005; Geer and Brennan in Am J Surg 165:68-72 1993). Application of hyperthermal intraperitoneal chemotherapy (HIPEC) is one of the choices treating these malignancies and prolonging patient survival time. Despite numbers of clinical trials showing positive effects of HIPEC against various types of cancer, the question whether hyperthermia significantly potentiate the cytotoxicity of cisplatin remains unanswered...
October 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/29721776/formation-of-lamellar-bodies-in-rat-liver-mitochondria-in-hyperthyroidism
#13
Natalya I Venediktova, Lubov L Pavlik, Natalia V Belosludtseva, Natalya V Khmil, Svetlana V Murzaeva, Galina D Mironova
In the present work, ultrastructural changes of rat liver mitochondria in hyperthyroidism were studied. Hyperthyroidism was induced in male Wistar rats by daily administration of 100 μg thyroxin per 100 g body weight for 5 days. The level of triiodothyronine and thyroxine increased 3- and 4-fold, respectively, in comparison with the same parameters in the control group, indicating the development of hyperthyroidism in experimental animals. It was found that under this experimental pathology 58% of the mitochondria are swollen, with their matrix enlightened, as compared to the control...
August 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/29687367/atovaquone-enhances-doxorubicin-s-efficacy-via-inhibiting-mitochondrial-respiration-and-stat3-in-aggressive-thyroid-cancer
#14
Zhuo Lv, Xintong Yan, Liying Lu, Chun Su, Yin He
The clinical management of anaplastic thyroid carcinoma and follicular thyroid carcinoma is challenging and requires an alternative therapeutic strategy. Although atovaquone is an FDA-approved anti-malarial drug, studies has recently demonstrated its anti-cancer activities. In line with these efforts, our study shows that atovaquone is an attractive candidate for thyroid cancer treatment. We show that atovaquone significantly inhibits growth, migration and survival in a concentration-dependent manner in 8505C and FTC113 cells...
August 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/29687366/molecular-modeling-of-non-covalent-binding-of-ligustrum-lucidum-secoiridoid-glucosides-to-ap-1-matrix-metalloproteinase-pathway-components
#15
Pathomwat Wongrattanakamon, Piyarat Nimmanpipug, Busaban Sirithunyalug, Wantida Chaiyana, Supat Jiranusornkul
Ligustrum lucidum secoiridoid glucosides have been demonstrated to treat various types of diseases such as inflammation, pain, hepatotoxicity and hyperlipidermic as well as tonic for liver and kidney. Matrix metalloproteinases (MMPs) play a key role upon the pathology of photoaging. The present computational study showed that among the six secoiridoid glucosides (ligustroside, lucidumoside A, lucidumoside C, neonuezhenide, oleoside dimethylester, and oleuropein), ligustroside and lucidumoside A competitively inhibit all MMP-1, MMP-3, and MMP-9 activities in the docking models...
August 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/29675736/decreased-content-rate-of-synthesis-and-export-of-cholesterol-in-the-brain-of-apoe-knockout-mice
#16
Valéria Sutti Nunes, Patrícia Miralda Cazita, Sérgio Catanozi, Edna Regina Nakandakare, Eder Carlos Rocha Quintão
Apolipoprotein E knockout (apoE-KO) mice present synaptic loss, cognitive dysfunction, and high plasma lipid levels that may affect brain function simulating Alzheimer disease. Plasma and brain sterols were measured in apoE-KO and in wild type control mice on a cholesterol-free, phytosterol-containing diet by gas chromatography coupled to a mass spectrometer. Plasma cholesterol and phytosterols (campesterol and sitosterol) were higher in apoE-KO compared to control mice. Cholesterol precursors (desmosterol and lathosterol) were not detected in plasma of control mice but were present in apoE-KO mice...
August 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/29998379/the-complexity-of-mitochondrial-outer-membrane-permeability-and-vdac-regulation-by-associated-proteins
#17
Aleksandr Klepinin, Lyudmila Ounpuu, Kati Mado, Laura Truu, Vladimir Chekulayev, Marju Puurand, Igor Shevchuk, Kersti Tepp, Anu Planken, Tuuli Kaambre
Previous studies have shown that class II β-tubulin plays a key role in the regulation of oxidative phosphorylation (OXPHOS) in some highly differentiated cells, but its role in malignant cells has remained unclear. To clarify these aspects, we compared the bioenergetic properties of HL-1 murine sarcoma cells, murine neuroblastoma cells (uN2a) and retinoic acid - differentiated N2a cells (dN2a). We examined the expression and possible co-localization of mitochondrial voltage dependent anion channel (VDAC) with hexokinase-2 (HK-2) and βII-tubulin, the role of depolymerized βII-tubuline and the effect of both proteins in the regulation of mitochondrial outer membrane (MOM) permeability...
July 12, 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/29882206/purinergic-receptors-and-neglected-tropical-diseases-why-ignore-purinergic-signaling-in-the-search-for-new-molecular-targets
#18
REVIEW
P A F Pacheco, L P Dantas, L G B Ferreira, Robson Xavier Faria
Purinergic receptors are widespread in the human organism and are involved in several physiological functions like neurotransmission, nociception, platelet aggregation, etc. In the immune system, they may regulate the expression and release of pro-inflammatory factors as well as the activation and death of several cell types. It is already described the participation of some purinergic receptors in the inflammation and pathological processes, such as a few neglected tropical diseases (NTDs) which affect more than 1 billion people in the world...
June 7, 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/29882205/downregulation-of-monocarboxylate-transporter-1-inhibits-the-invasion-and-migration-through-suppression-of-the-pi3k-akt-signaling-pathway-in-human-nasopharyngeal-carcinoma-cells
#19
Pei Zhang, Jie Ma, Jiao Gao, Fang Liu, Xiaojin Sun, Fang Fang, Surong Zhao, Hao Liu
Monocarboxylate transporter 1 (MCT1) has been reported to be correlated wtih decreased survival and advanced stage of progression in a series of human tumor cells and primary cancers. Specifically, MCT1 has been documented to be involved in tumor progression, including invasion and migration. Here, we investigated the mechanism and effect of regulation of MCT1 on invasion and migration of nasopharyngeal carcinoma (NPC) cells. In the study, we firstly demonstrated that the expression of MCT1 in CNE2Z cells was obviously higher than that in HNE1 cells...
June 7, 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/29808274/new-ways-of-thinking-about-old-things-the-role-of-o-glcnac-in-cellular-metabolism
#20
EDITORIAL
Chad Slawson
No abstract text is available yet for this article.
June 2018: Journal of Bioenergetics and Biomembranes
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