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https://www.readbyqxmd.com/read/28545126/pheromone-sensing-neurons-regulate-peripheral-lipid-metabolism-in-caenorhabditis-elegans
#1
Rosalind Hussey, Jon Stieglitz, Jaleh Mesgarzadeh, Tiffany T Locke, Ying K Zhang, Frank C Schroeder, Supriya Srinivasan
It is now established that the central nervous system plays an important role in regulating whole body metabolism and energy balance. However, the extent to which sensory systems relay environmental information to modulate metabolic events in peripheral tissues has remained poorly understood. In addition, it has been challenging to map the molecular mechanisms underlying discrete sensory modalities with respect to their role in lipid metabolism. In previous work our lab has identified instructive roles for serotonin signaling as a surrogate for food availability, as well as oxygen sensing, in the control of whole body metabolism...
May 18, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28544938/sex-steroids-and-metabolic-responses-in-mussels-mytilus-galloprovincialis-exposed-to-drospirenone
#2
Tiziana Cappello, Denise Fernandes, Maria Maisano, Andrea Casano, Marta Bonastre, Maria João Bebianno, Angela Mauceri, Salvatore Fasulo, Cinta Porte
Drospirenone (DRO) is a synthetic progestin derived from 17α-spironolactone with a pharmacological mechanism of action similar to progesterone. Despite its wide use as pharmaceutical and consequent continuous release into the aquatic environment, DRO effects have been poorly investigated on aquatic biota. In order to unravel the toxicity mechanisms of DRO, mussels Mytilus galloprovincialis were exposed for 7 days to different concentrations of DRO, namely 20ng/L (Low; L), 200ng/L (Medium; M), 2000ng/L (High; H) and 10μg/L (Super High; SH) nominal doses...
May 22, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28544881/mammalian-systems-biotechnology-reveals-global-cellular-adaptations-in-a-recombinant-cho-cell-line
#3
Faraaz Noor Khan Yusufi, Meiyappan Lakshmanan, Ying Swan Ho, Bernard Liat Wen Loo, Pramila Ariyaratne, Yuansheng Yang, Say Kong Ng, Tessa Rui Min Tan, Hock Chuan Yeo, Hsueh Lee Lim, Sze Wai Ng, Ai Ping Hiu, Chung Ping Chow, Corrine Wan, Shuwen Chen, Gavin Teo, Gao Song, Ju Xin Chin, Xiaoan Ruan, Ken Wing Kin Sung, Wei-Shou Hu, Miranda Gek Sim Yap, Muriel Bardor, Niranjan Nagarajan, Dong-Yup Lee
Effective development of host cells for therapeutic protein production is hampered by the poor characterization of cellular transfection. Here, we employed a multi-omics-based systems biotechnology approach to elucidate the genotypic and phenotypic differences between a wild-type and recombinant antibody-producing Chinese hamster ovary (CHO) cell line. At the genomic level, we observed extensive rearrangements in specific targeted loci linked to transgene integration sites. Transcriptional re-wiring of DNA damage repair and cellular metabolism in the antibody producer, via changes in gene copy numbers, was also detected...
May 24, 2017: Cell Systems
https://www.readbyqxmd.com/read/28544614/proteomic-profiling-of-the-hypothalamus-in-two-mouse-models-of-narcolepsy
#4
Sausan Azzam, Daniela Schlatzer, David Nethery, Dania Saleh, Xiaolin Li, Afaf Akladious, Mark R Chance, Kingman P Strohl
Narcolepsy is a disabling neurological disorder of sleepiness linked to the loss of neurons producing orexin neuropeptides in the hypothalamus. Two well characterized phenotypic mouse models of narcolepsy, loss-of-function (orexin-knockout) and progressive loss of orexin (orexin/ataxin-3) exist. The open question is whether the proteomics signatures of the hypothalamus would be different between the two models. To address this gap, we utilized a label-free proteomics approach and conducted a hypothalamic proteome analysis by comparing each disease model to that of wild type...
May 22, 2017: Proteomics
https://www.readbyqxmd.com/read/28544379/a-widened-substrate-selectivity-filter-of-eukaryotic-formate-nitrite-transporters-enables-high-level-lactate-conductance
#5
Marie Wiechert, Holger Erler, André Golldack, Eric Beitz
Bacterial formate-nitrite transporters (FNT) regulate the metabolic flow of small weak mono-acids derived from anaerobic mixed-acid fermentation, such as formate, and further transport nitrite, and hydrosulfide. The eukaryotic Plasmodium falciparum FNT is vital for the malaria parasite by its ability to release the larger l-lactate substrate as the metabolic end product of anaerobic glycolysis in symport with protons preventing cytosolic acidification. However, the molecular basis for substrate discrimination by FNTs has remained unclear...
May 21, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28544245/ghrelin-receptor-inverse-agonists-as-a-novel-therapeutic-approach-against-obesity-related-metabolic-disease
#6
Kathrin Abegg, Lara Bernasconi, Melanie Hutter, Lynda Whiting, Claudio Pietra, Claudio Giuliano, Thomas A Lutz, Thomas Riediger
AIMS: Ghrelin is implicated in the control of energy balance and glucose homeostasis. The ghrelin receptor exhibits ligand independent constitutive activity, which can be pharmacologically exploited to induce inverse ghrelin actions. Since ghrelin receptor inverse agonists (GHSR-IA) might be effective for the treatment of obesity-related metabolic disease, we tested two novel synthetic compounds GHSR-IA1 and GHSR-IA2. MATERIALS AND METHODS: In functional cell assays, electrophysiogical and immunohistochemical experiments, we demonstrated inverse agonist activity for GHSR-IA1 and GHSR-IA2...
May 24, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28544235/absence-of-juvenile-hormone-signalling-regulates-the-dynamic-expression-profiles-of-nutritional-metabolism-genes-during-diapause-preparation-in-the-cabbage-beetle-colaphellus-bowringi
#7
W Liu, Q-Q Tan, L Zhu, Y Li, F Zhu, C-L Lei, X-P Wang
Temperate insects have evolved diapause, a period of programmed developmental arrest during specific life stages, to survive unfavourable conditions. During the diapause preparation phase (DPP), diapause-destined individuals generally store large amounts of fat by regulating nutrition distribution for the energy requirement during diapause maintenance and postdiapause development. Although nutritional patterns during the DPP have been investigated at physiological and biochemical levels in many insects, it remains largely unknown how nutritional metabolism is regulated during the DPP at molecular levels...
May 20, 2017: Insect Molecular Biology
https://www.readbyqxmd.com/read/28544208/ultra-high-field-magnetic-resonance-spectroscopy-in-non-alcoholic-fatty-liver-disease-novel-mechanistic-and-diagnostic-insights-of-energy-metabolism-in-non-alcoholic-steatohepatitis-and-advanced-fibrosis
#8
Stefan Traussnigg, Christian Kienbacher, Martin Gajdošík, Ladislav Valkovič, Emina Halilbasic, Judith Stift, Christian Rechling, Harald Hofer, Petra Steindl-Munda, Peter Ferenci, Fritz Wrba, Siegfried Trattnig, Martin Krššák, Michael Trauner
BACKGROUND & AIMS: With the rising prevalence of non-alcoholic fatty liver disease (NAFLD) and steatohepatitis (NASH) non-invasive tools obtaining pathomechanistic insights to improve risk stratification are urgently needed. We therefore explored high- and ultra-high-field magnetic resonance spectroscopy (MRS) to obtain novel mechanistic and diagnostic insights into alterations of hepatic lipid, cell membrane and energy metabolism across the spectrum of NAFLD. METHODS: MRS and liver biopsy were performed in 30 NAFLD patients with NAFL (n=8) or NASH (n=22)...
April 24, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/28544147/short-term-fasting-promotes-insulin-expression-in-rat-hypothalamus
#9
Tamara B Dakic, Tanja V Jevdjovic, Mina I Peric, Ivana M Bjelobaba, Milica B Markelic, Bojana S Milutinovic, Iva V Lakic, Nebojsa I Jasnic, Jelena D Djordjevic, Predrag Z Vujovic
In the hypothalamus, insulin takes on many roles involved in energy homeostasis. Therefore the aim of this study was to examine hypothalamic insulin expression during the initial phase of the metabolic response to fasting. Hypothalamic insulin content was assessed by both radioimmunoassay and western blot. The relative expression of insulin mRNA was examined by q PCR. Immunofluorescence and immunohistochemistry were used to determine the distribution of insulin immunopositivity in the hypothalamus. After six-hour fasting, both glucose and insulin levels were decreased in serum but not in the cerebrospinal fluid...
May 20, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28544073/hydrophilic-interaction-and-reversed-phase-ultra-performance-liquid-chromatography-tof-ms-for-metabolomic-analysis-of-veratrum-nigrum-induced-cardiotoxicity
#10
Ziheng Wei, Xu Dong, Hanzhe Zhang, Songyan Gao, Wei Shi, Feng Yang, Xin Dong
The acute cardiotoxicity induced by Veratrum nigrum (VN) is explored by analysing heart tissue metabolic profiles in mouse models and applying reversed-phase liquid chromatography mass spectrometry (RPLC-MS) and hydrophilic interaction liquid chromatography mass spectrometry (HILIC-MS) that are based on ultra-high performance liquid chromatography quadrupole time-of-flight mass spectrometry (UPLC-QTOF-MS). An animal model of acute heart injury was established in mice via intra-gastric administration of VN. Then, electrocardiogram, echocardiograph monitoring of cardiac function and pathological examination were performed on mice both in the control and VN groups, and it was successfully verified that acute heart injury was caused...
May 22, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28543565/lactate-supplementation-in-severe-traumatic-brain-injured-adults-by-primed-constant-infusion-of-sodium-l-lactate
#11
Stephanie M Wolahan, Howard C Mao, Courtney Real, Paul M Vespa, Thomas C Glenn
Carbohydrate fuel augmentation following traumatic brain injury may be a viable treatment to improve recovery when cerebral oxidative metabolism of glucose is depressed. We performed a primed constant sodium L-lactate infusion in 11 moderate to severely brain injured adults. Blood was collected before and periodically during the infusion study. We quantified global cerebral uptake of glucose and lactate and other systemic metabolites associated with energy metabolism. Our hypothesis was that cerebral lactate uptake, as measured by the arteriovenous difference of lactate (AVDlac), would increase in severely injured TBI patients in the neurocritical care unit...
May 20, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/28543058/shallow-size-density-relations-within-mammal-clades-suggest-greater-intra-guild-ecological-impact-of-large-bodied-species
#12
R Ø Pedersen, S Faurby, J-C Svenning
1.Population densities of species have a predictable relationship to their body mass on a global scale. This relationship is known as the size-density relationship. The relationship was originally found to be directly opposite of metabolic rate scaling, which led to the hypothesis of energetic equivalence. However, recent studies have suggested that the size-density relationship varies between clades. Specifically, the size-density relationship for certain mammal clades has been found to be less negative than the relationship across all mammals...
May 24, 2017: Journal of Animal Ecology
https://www.readbyqxmd.com/read/28543017/heart-heat-separation
#13
Willem J van der Laarse
The human heart requires a considerable amount of energy (10 W at rest to 100 W during exercise) for basal metabolism, activation processes and work to circulate blood (heart rate × stroke volume × arterial blood pressure). This article is protected by copyright. All rights reserved.
May 25, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28542798/glut-1-receptor-expression-and-circulating-levels-of-fasting-glucose-in-high-grade-serous-ovarian-cancer
#14
L Pizzuti, D Sergi, Chiara Mandoj, B Antoniani, Francesca Sperati, Andrea Chirico, Luigi Di Lauro, Mario Valle, Alfredo Garofalo, Enrico Vizza, Gabriele Corrado, Federica Tomao, Massimo Rinaldi, Silvia Carpano, M Maugeri-Saccà, Laura Conti, Giovanna Digiesi, Paolo Marchetti, Ruggero De Maria, A Giordano, Maddalena Barba, Maria Antonietta Carosi, Patrizia Vici
In recent years, the poorly remarkable goals achieved in terms of patients' important outcomes for ovarian cancer have fueled our interest towards the study of its metabolic roots. Within this research pipeline, we assessed the association between the expression of the glucose transporter GLUT1, as expressed at the tumor tissue level, and circulating pre-surgical levels of fasting glucose in a case series including data from 40 patients with high FIGO stage serous ovarian cancer. Patients who provided data to the current analysis were randomly selected from a larger cohort...
May 20, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28542616/regulation-of-acetyl-coa-synthetase-transcription-by-the-crbs-r-two-component-system-is-conserved-in-genetically-diverse-environmental-pathogens
#15
Kristin Jacob, Anna Rasmussen, Paul Tyler, Mariah M Servos, Mariame Sylla, Cecilia Prado, Elizabeth Daniele, Josh S Sharp, Alexandra E Purdy
The CrbS/R two-component signal transduction system is a conserved regulatory mechanism through which specific Gram-negative bacteria control acetate flux into primary metabolic pathways. CrbS/R governs expression of acetyl-CoA synthase (acsA), an enzyme that converts acetate to acetyl-CoA, a metabolite at the nexus of the cell's most important energy-harvesting and biosynthetic reactions. During infection, bacteria can utilize this system to hijack host acetate metabolism and alter the course of colonization and pathogenesis...
2017: PloS One
https://www.readbyqxmd.com/read/28542596/progressive-mitochondrial-protein-lysine-acetylation-and-heart-failure-in-a-model-of-friedreich-s-ataxia-cardiomyopathy
#16
Amanda R Stram, Gregory R Wagner, Brian D Fogler, P Melanie Pride, Matthew D Hirschey, R Mark Payne
INTRODUCTION: The childhood heart disease of Friedreich's Ataxia (FRDA) is characterized by hypertrophy and failure. It is caused by loss of frataxin (FXN), a mitochondrial protein involved in energy homeostasis. FRDA model hearts have increased mitochondrial protein acetylation and impaired sirtuin 3 (SIRT3) deacetylase activity. Protein acetylation is an important regulator of cardiac metabolism and loss of SIRT3 increases susceptibility of the heart to stress-induced cardiac hypertrophy and ischemic injury...
2017: PloS One
https://www.readbyqxmd.com/read/28542568/nesfatin-1-like-peptide-is-a-novel-metabolic-factor-that-suppresses-feeding-and-regulates-whole-body-energy-homeostasis-in-male-wistar-rats
#17
Kavishankar Gawli, Naresh Ramesh, Suraj Unniappan
Nucleobindin-1 has high sequence similarity to nucleobindin-2, which encodes the anorectic and metabolic peptide, nesfatin-1. We previously reported a nesfatin-1-like peptide (NLP), anorectic in fish and insulinotropic in mice islet beta-like cells. The main objective of this research was to determine whether NLP is a metabolic regulator in male Wistar rats. A single intraperitoneal (IP) injection of NLP (100 μg/kg BW) decreased food intake and increased ambulatory movement, without causing any change in total activity or energy expenditure when compared to saline-treated rats...
2017: PloS One
https://www.readbyqxmd.com/read/28542566/proteomic-analysis-in-the-dufour-s-gland-of-africanized-apis-mellifera-workers-hymenoptera-apidae
#18
Aparecida das Dores Teixeira, Patricia D Games, Benjamin B Katz, John M Tomich, José C Zanuncio, José Eduardo Serrão
The colony of eusocial bee Apis mellifera has a reproductive queen and sterile workers performing tasks such as brood care and foraging. Chemical communication plays a crucial role in the maintenance of sociability in bees with many compounds released by the exocrine glands. The Dufour's gland is a non-paired gland associated with the sting apparatus with important functions in the communication between members of the colony, releasing volatile chemicals that influence workers roles and tasks. However, the protein content in this gland is not well studied...
2017: PloS One
https://www.readbyqxmd.com/read/28542527/genomic-and-transcriptomic-analyses-reveal-adaptation-mechanisms-of-an-acidithiobacillus-ferrivorans-strain-yl15-to-alpine-acid-mine-drainage
#19
Tangjian Peng, Liyuan Ma, Xue Feng, Jiemeng Tao, Meihua Nan, Yuandong Liu, Jiaokun Li, Li Shen, Xueling Wu, Runlan Yu, Xueduan Liu, Guanzhou Qiu, Weimin Zeng
Acidithiobacillus ferrivorans is an acidophile that often occurs in low temperature acid mine drainage, e.g., that located at high altitude. Being able to inhabit the extreme environment, the bacterium must possess strategies to copy with the survival stress. Nonetheless, information on the strategies is in demand. Here, genomic and transcriptomic assays were performed to illuminate the adaptation mechanisms of an A. ferrivorans strain YL15, to the alpine acid mine drainage environment in Yulong copper mine in southwest China...
2017: PloS One
https://www.readbyqxmd.com/read/28542212/proteome-dynamics-of-cold-acclimating-rhododendron-species-contrasting-in-their-freezing-tolerance-and-thermonasty-behavior
#20
Jose V Die, Rajeev Arora, Lisa J Rowland
To gain a better understanding of cold acclimation in rhododendron and in woody perennials in general, we used the 2D-DIGE technique to analyze the rhododendron proteome during the seasonal development of freezing tolerance. We selected two species varying in their cold acclimation ability as well as their thermonasty response (folding of leaves in response to low temperature). Proteins were extracted from leaves of non-acclimated (NA) and cold acclimated (CA) plants of the hardier thermonastic species, R. catawbiense (Cata...
2017: PloS One
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