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https://www.readbyqxmd.com/read/28926512/orthosiphon-stamineus-misai-kucing-ameliorated-postmenopausal-osteoporosis-in-rat-model
#1
Rubiatul Adawiyah Bokhari, Seng Fong Lau, Suhaila Mohamed
OBJECTIVE: Orthosiphon stamineus (OS) or Misai Kucing (Java tea) is a popular herbal supplement from Southeast Asia for various metabolic, age-related diseases. This study investigated the potential use of OS leaf extracts to ameliorate osteoporosis in ovariectomized rats. METHODS: Fifty-six female Sprague-Dawley rats were randomly allocated into eight groups (n = 7): SHAM (healthy sham control); OVX (ovarietomized) nontreated rats (negative control); OVX + Remifemin (100 mg/kg body weight), and 2% green tea extract (positive controls); OVX + OS 50% ethanolic and aqueous extracts, both at either 150 or 300 mg/kg...
September 18, 2017: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/28925409/metabolic-and-genomic-adaptations-to-winter-fattening-in-a-primate-species-the-grey-mouse-lemur-microcebus-murinus
#2
J Terrien, M Gaudubois, D Champeval, V Zaninotto, L Roger, J F Riou, F Aujard
AIM: To understand the mechanisms underlying the development of metabolic changes leading to obesity remains a major world health issue. Among such mechanisms, seasonality is quite underestimated although it corresponds to the manifestation of extreme metabolic flexibility in response to a changing environment. Nevertheless, the changes induced by such flexibility are far to be understood, especially at the level of insulin signaling, genomic stability or inflammation. METHODS: Here, we investigated the metabolic regulations displayed by a seasonal primate species, the grey mouse lemur (Microcebus murinus) that exhibits pronounced changes in body mass during the 6-month winter season: a fattening period followed by a spontaneous fat loss, without ever reaching pathological stages...
August 14, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28923167/cyclic-bouts-of-extreme-bradycardia-counteract-the-high-metabolism-of-frugivorous-bats
#3
M Teague O'Mara, Martin Wikelski, Christian C Voigt, Andries Ter Maat, Henry S Pollock, Gary Burness, Lanna M Desantis, Dina Kn Dechmann
Active flight requires the ability to efficiently fuel bursts of costly locomotion while maximizing energy conservation during non-flying times. We took a multi-faceted approach to estimate how fruit-eating bats (Uroderma bilobatum) manage a high-energy lifestyle fueled primarily by fig juice. Miniaturized heart rate telemetry shows that they use a novel, cyclic, bradycardic state that reduces daily energetic expenditure by 10% and counteracts heart rates as high as 900 bpm during flight. Uroderma bilobatum support flight with some of the fastest metabolic incorporation rates and dynamic circulating cortisol in vertebrates...
September 19, 2017: ELife
https://www.readbyqxmd.com/read/28917932/rewiring-neutral-lipids-production-for-the-de-novo-synthesis-of-wax-esters-in-rhodococcus-opacus-pd630
#4
Mariana P Lanfranconi, Héctor M Alvarez
Rhodococcus opacus PD630 accumulates significant amounts of triacylglycerols (TAG), but is not able to de novo synthesize wax esters (WE) from structural unrelated carbon sources, such as gluconate. In this study, strain PD630 was engineered to produce WE by heterologous expression of maqu_2220 gene, which encodes a fatty acyl-CoA reductase for the production of fatty alcohols in Marinobacter hydrocarbonoclasticus. Recombinant cells produced ca. 46% of WE and 54% of TAG (of total WE+TAG) from gluconate compared with the wild type, which produced 100% of TAG...
September 13, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28911768/natural-isotope-abundance-in-metabolites-techniques-and-kinetic-isotope-effect-measurement-in-plant-animal-and-human-tissues
#5
Illa Tea, Guillaume Tcherkez
The natural isotope abundance in bulk organic matter or tissues is not a sufficient base to investigate physiological properties, biosynthetic mechanisms, and nutrition sources of biological systems. In fact, isotope effects in metabolism lead to a heterogeneous distribution of (2)H, (18)O, (13)C, and (15)N isotopes in metabolites. Therefore, compound-specific isotopic analysis (CSIA) is crucial to biological and medical applications of stable isotopes. Here, we review methods to implement CSIA for (15)N and (13)C from plant, animal, and human samples and discuss technical solutions that have been used for the conversion to CO2 and N2 for IRMS analysis, derivatization and isotope effect measurements...
2017: Methods in Enzymology
https://www.readbyqxmd.com/read/28910145/the-clinical-pharmacokinetics-of-amphetamines-utilized-in-the-treatment-of-attention-deficit-hyperactivity-disorder
#6
John S Markowitz, Kennerly S Patrick
Amphetamine (AMP), an indirectly acting psychostimulant approved for the treatment of attention-deficit/hyperactivity disorder (ADHD) in children, adolescents, and adults, is among the most long-standing therapeutic agents in all of clinical psychopharmacology. This review focuses on AMP absorption, metabolism, and elimination brought to bear on comparative pharmacokinetics in its various formulations. A comprehensive search of the published literature was conducted using MEDLINE (PubMed) and Google Scholar databases through April 2017 to retrieve all pertinent in vitro and human studies for review and synthesis...
September 14, 2017: Journal of Child and Adolescent Psychopharmacology
https://www.readbyqxmd.com/read/28905000/transcriptome-analysis-of-polyhydroxybutyrate-cycle-mutants-reveals-discrete-loci-connecting-nitrogen-utilization-and-carbon-storage-in-sinorhizobium-meliloti
#7
Maya D'Alessio, Ricardo Nordeste, Andrew C Doxey, Trevor C Charles
Polyhydroxybutyrate (PHB) and glycogen polymers are produced by bacteria as carbon storage compounds under unbalanced growth conditions. To gain insights into the transcriptional mechanisms controlling carbon storage in Sinorhizobium meliloti, we investigated the global transcriptomic response to the genetic disruption of key genes in PHB synthesis and degradation and in glycogen synthesis. Under both nitrogen-limited and balanced growth conditions, transcriptomic analysis was performed with genetic mutants deficient in PHB synthesis (phbA, phbB, phbAB, and phbC), PHB degradation (bdhA, phaZ, and acsA2), and glycogen synthesis (glgA1)...
September 2017: MSystems
https://www.readbyqxmd.com/read/28900721/effects-of-per3-clock-gene-polymorphisms-on-aging-related-changes-of-the-cerebral-cortex
#8
Delphine Dewandre, Mercedes Atienza, Mayely P Sanchez-Espinosa, Jose L Cantero
Considerable evidence suggests that circadian rhythmicity is progressively disrupted in senescence. Among clock genes, Period3 (PER3) has been associated with circadian phenotypes, homeostatic regulation of sleep, and cognitive performance in young adults. However, the effects of PER3 genotype on aging-related changes in both cognitive function and cortical integrity remain largely unknown. To shed light into this issue, we have investigated differences in cognitive performance, patterns of cortical thickness, and cortical glucose consumption in normal elderly subjects homozygous carriers of the short (PER3(4/4), n = 32) and long repeat alleles (PER3(5/5), n = 32)...
September 12, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28894932/genomic-insights-into-temperature-dependent-transcriptional-responses-of-kosmotoga-olearia-a-deep-biosphere-bacterium-that-can-grow-from-20-to-79%C3%A2-%C3%A2-c
#9
Stephen M J Pollo, Abigail A Adebusuyi, Timothy J Straub, Julia M Foght, Olga Zhaxybayeva, Camilla L Nesbø
Temperature is one of the defining parameters of an ecological niche. Most organisms thrive within a temperature range that rarely exceeds ~30 °C, but the deep subsurface bacterium Kosmotoga olearia can grow over a temperature range of 59 °C (20-79 °C). To identify genes correlated with this flexible phenotype, we compared transcriptomes of K. olearia cultures grown at its optimal 65 °C to those at 30, 40, and 77 °C. The temperature treatments affected expression of 573 of 2224 K. olearia genes. Notably, this transcriptional response elicits re-modeling of the cellular membrane and changes in metabolism, with increased expression of genes involved in energy and carbohydrate metabolism at high temperatures and up-regulation of amino acid metabolism at lower temperatures...
September 11, 2017: Extremophiles: Life Under Extreme Conditions
https://www.readbyqxmd.com/read/28892300/thermodynamically-diverse-syntrophic-aromatic-compound-catabolism
#10
Masaru Konishi Nobu, Takashi Narihiro, Miaomiao Liu, Kyohei Kuroda, Ran Mei, Wen-Tso Liu
Specialized organotrophic Bacteria "syntrophs" and methanogenic Archaea "methanogens" form a unique metabolic interaction to accomplish cooperative mineralization of organic compounds to CH4 and CO2 . Due to challenges in cultivation of syntrophs, mechanisms for how their organotrophic catabolism circumvents thermodynamic restrictions remain unclear. In this study, we investigate two communities hosting diverse syntrophic aromatic compound metabolizers (Syntrophus, Syntrophorhabdus, Pelotomaculum, and an uncultivated Syntrophorhabdacaeae member) to uncover their catabolic diversity and flexibility...
September 11, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28881863/disrupting-igf-signaling-in-adult-mice-conditions-leanness-resilient-energy-metabolism-and-high-growth-hormone-pulses
#11
Jean-Christophe François, Saba Aïd, Zayna Chaker, Philippe Lacube, Jie Xu, Racha Fayad, Francine Côté, Patrick Even, Martin Holzenberger
Growth hormone (GH) and insulinlike growth factor (IGF) promote aging and age-related pathologies. Inhibiting this pathway by targeting IGF receptor (IGF-1R) is a promising strategy to extend life span, alleviate age-related diseases, and reduce tumor growth. Although anti-IGF-1R agents are being developed, long-term effects of IGF-1R blockade remain unknown. In this study, we used ubiquitous inducible IGF-1R knockout (UBIKOR) to suppress signaling in all adult tissues and screened health extensively. Surprisingly, UBIKOR mice showed no overt defects and presented with rather inconspicuous health, including normal cognition...
July 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28879466/involvement-of-metabolic-components-volatile-compounds-pr-proteins-and-mechanical-strengthening-in-multilayer-protection-of-cucumber-plants-against-rhizoctonia-solani-activated-by-trichoderma-atroviride-trs25
#12
Justyna Nawrocka, U Małolepsza, K Szymczak, M Szczech
In the present study, the spread of Rhizoctonia solani-induced disease was limited when cucumber plants were pretreated with Trichoderma atroviride TRS25. The systemic disease suppression was related to TRS25-induced resistance (TISR) induction with simultaneous plant growth promotion. Protection of cucumber was related to enhanced activity of defense enzymes, e.g., guaiacol peroxidase (GPX), syringaldazine peroxidase (SPX), phenylalanine ammonia lyase (PAL), and polyphenol oxidase (PPO) as well as phenolic (PC) concentration increases in the conditions of hydrogen peroxide (H2O2) accumulation, resulting in thiobarbituric acid reactive substance (TBARS) decrease...
September 6, 2017: Protoplasma
https://www.readbyqxmd.com/read/28872189/vascular-inflammatory-and-metabolic-factors-associated-with-cognition-in-aging-persons-with-chronic-epilepsy
#13
Bruce P Hermann, Mark A Sager, Rebecca L Koscik, Kate Young, Keith Nakamura
We examined cognition in aging persons with chronic epilepsy; characterized targeted vascular, inflammatory, and metabolic risk factors associated with abnormal cognitive aging in the general population; and examined associations between cognition and vascular, inflammatory, and metabolic health. Participants included 40 persons with chronic localization-related epilepsy and 152 controls, aged 54.6 and 55.3, respectively. Participants underwent neuropsychological assessment, clinical examination, and fasting blood evaluation for quantification of vascular status (systolic and diastolic blood pressure, obesity/body mass index [BMI], total and high-density lipoprotein [HDL] cholesterol level, and homocysteine), inflammatory markers (high sensitivity C-reactive protein [hs-CRP], and interleukin-6 [IL-6]), and metabolic status (insulin resistance [Homeostatic Model Assessment of Insulin Resistance (HOMA-IR)], glucose)...
September 4, 2017: Epilepsia
https://www.readbyqxmd.com/read/28867926/quantum-dot-light-emitting-devices-for-photomedical-applications
#14
Hao Chen, Juan He, Raymond Lanzafame, Istvan Stadler, Hamid El Hamidi, Hui Liu, Jonathan Celli, Michael R Hamblin, Yingying Huang, Emily Oakley, Gal Shafirstein, Ho-Kyoon Chung, Shin-Tson Wu, Yajie Dong
While OLEDs have struggled to find a niche lighting application that can fully take advantage of their unique form factors as thin, flexible, lightweight and uniformly large-area luminaire, photomedical researchers have been in search of low-cost, effective illumination devices with such form factors that could facilitate widespread clinical applications of photodynamic therapy (PDT) or photobiomodulation (PBM). Although existing OLEDs with either fluorescent or phosphorescent emitters cannot achieve the required high power density at the right wavelength windows for photomedicine, the recently developed ultrabright and efficient deep red quantum dot light emitting devices (QLEDs) can nicely fit into this niche...
March 2017: Journal of the Society for Information Display
https://www.readbyqxmd.com/read/28867330/silencing-of-juvenile-hormone-epoxide-hydrolase-gene-nljheh-enhances-short-wing-formation-in-a-macropterous-strain-of-the-brown-planthopper-nilaparvata-lugens
#15
Jing Zhao, Yunlong Zhou, Xiang Li, Wanlun Cai, Hongxia Hua
The rice brown planthopper, Nilaparvata lugens, is an important migratory pest in many rice planting areas of Asia. The typical wing dimorphism of N. lugens gives them flexibility to adapt to different environmental cues. As an important hormone in the insect's endocrine regulation, juvenile hormone (JH) has previously been shown to participate in the wing morph determination of N. lugens. In this paper, we investigated the possible wing morph determination roles of two JH metabolic enzymes, JH esterase (JHE) and JH epoxide hydrolase (JHEH)...
September 1, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28862046/glucose-metabolism-and-metabolic-flexibility-in-cultured-skeletal-muscle-cells-is-related-to-exercise-status-in-young-male-subjects
#16
Jenny Lund, Daniel S Tangen, Håvard Wiig, Hans K Stadheim, Siw A Helle, Jesper B Birk, Thorsten Ingemann-Hansen, Arild C Rustan, G Hege Thoresen, Jørgen F P Wojtaszewski, Eili T Kase, Jørgen Jensen
We hypothesised that skeletal muscles of healthy young people have a large variation in oxidative capacity and fibre-type composition, and aimed therefore to investigate glucose metabolism in biopsies and myotubes isolated from musculus vastus lateralis from healthy males with varying degrees of maximal oxygen uptake. Trained and intermediary trained subjects showed higher carbohydrate oxidation in vivo. Fibre-type distribution in biopsies and myotubes did not differ between groups. There was no correlation between fibre-type I expression in biopsies and myotubes...
September 1, 2017: Archives of Physiology and Biochemistry
https://www.readbyqxmd.com/read/28861523/monodeuterated-methane-an-isotopic-tool-to-assess-biological-methane-metabolism-rates
#17
Jeffrey J Marlow, Joshua A Steele, Wiebke Ziebis, Silvan Scheller, David Case, Linda M Reynard, Victoria J Orphan
Biological methane oxidation is a globally relevant process that mediates the flux of an important greenhouse gas through both aerobic and anaerobic metabolic pathways. However, measuring these metabolic rates presents many obstacles, from logistical barriers to regulatory hurdles and poor precision. Here we present a new approach for investigating microbial methane metabolism based on hydrogen atom dynamics, which is complementary to carbon-focused assessments of methanotrophy. The method uses monodeuterated methane (CH3D) as a metabolic substrate, quantifying the aqueous D/H ratio over time using off-axis integrated cavity output spectroscopy...
July 2017: MSphere
https://www.readbyqxmd.com/read/28861127/multi-parameter-comparison-of-a-standardized-mixed-meal-tolerance-test-in-healthy-and-type-2-diabetic-subjects-the-phenflex-challenge
#18
Suzan Wopereis, Johanna H M Stroeve, Annette Stafleu, Gertruud C M Bakker, Jacobus Burggraaf, Marjan J van Erk, Linette Pellis, Ruud Boessen, Alwine A F Kardinaal, Ben van Ommen
BACKGROUND: A key feature of metabolic health is the ability to adapt upon dietary perturbations. Recently, it was shown that metabolic challenge tests in combination with the new generation biomarkers allow the simultaneous quantification of major metabolic health processes. Currently, applied challenge tests are largely non-standardized. A systematic review defined an optimal nutritional challenge test, the "PhenFlex test" (PFT). This study aimed to prove that PFT modulates all relevant processes governing metabolic health thereby allowing to distinguish subjects with different metabolic health status...
2017: Genes & Nutrition
https://www.readbyqxmd.com/read/28861071/tetrathionate-and-elemental-sulfur-shape-the-isotope-composition-of-sulfate-in-acid-mine-drainage
#19
Nurgul Balci, Benjamin Brunner, Alexandra V Turchyn
Sulfur compounds in intermediate valence states, for example elemental sulfur, thiosulfate, and tetrathionate, are important players in the biogeochemical sulfur cycle. However, key understanding about the pathways of oxidation involving mixed-valance state sulfur species is still missing. Here we report the sulfur and oxygen isotope fractionation effects during the oxidation of tetrathionate (S4O6(2-)) and elemental sulfur (S°) to sulfate in bacterial cultures in acidic conditions. Oxidation of tetrathionate by Acidithiobacillus thiooxidans produced thiosulfate, elemental sulfur and sulfate...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28860122/exercise-induced-changes-in-glucose-metabolism-promote-physiologic-cardiac-growth
#20
Andrew A Gibb, Paul N Epstein, Shizuka Uchida, Yuting Zheng, Lindsey A McNally, Detlef Obal, Kartik Katragadda, Patrick J Trainor, Daniel J Conklin, Kenneth R Brittian, Michael T Tseng, Jianxun Wang, Steven P Jones, Aruni Bhatnagar, Bradford G Hill
Background -Exercise promotes metabolic remodeling in the heart, which is associated with physiologic cardiac growth; however, it is not known whether or how physical activity-induced changes in cardiac metabolism cause myocardial remodeling. In this study, we tested whether exercise-mediated changes in cardiomyocyte glucose metabolism are important for physiologic cardiac growth. Methods -We used radiometric, immunologic, metabolomic, and biochemical assays to measure changes in myocardial glucose metabolism in mice subjected to acute and chronic treadmill exercise...
August 31, 2017: Circulation
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