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J Thomas Brenna

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https://www.readbyqxmd.com/read/28960904/high-volume-steroid-isotopic-standards-developed-as-working-standards-for-gas-chromatography-combustion-isotope-ratio-mass-spectrometry
#1
Herbert J Tobias, J Thomas Brenna
High precision carbon isotope ratio analysis of urinary steroids by gas chromatography combustion isotope ratio mass spectrometry (GCC-IRMS) is the official test to detect illicit doping of synthetic versions of endogenous steroids such as testosterone. Our group created the first steroid isotopic standards (SIS) specifically for the World Anti-Doping Agency (WADA) accredited laboratories. The standards contain mixtures of steroids as acetates or free steroids at ~400 μg each per ampoule and have been widely distributed to anti-doping laboratories to facilitate comparability of inter-laboratory results...
September 28, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28931587/maternal-choline-supplementation-modulates-placental-nutrient-transport-and-metabolism-in-late-gestation-of-mouse-pregnancy
#2
Sze Ting Cecilia Kwan, Julia H King, Jian Yan, Zhen Wang, Xinyin Jiang, Jason S Hutzler, Hallie R Klein, J Thomas Brenna, Mark S Roberson, Marie A Caudill
Background: Fetal growth is dependent on placental nutrient supply, which is influenced by placental perfusion and transporter abundance. Previous research indicates that adequate choline nutrition during pregnancy improves placental vascular development, supporting the hypothesis that choline may affect placental nutrient transport.Objective: The present study sought to determine the impact of maternal choline supplementation (MCS) on placental nutrient transporter abundance and nutrient metabolism during late gestation...
September 20, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28838557/fads3-modulates-docosahexaenoic-acid-in-liver-and-brain
#3
Ji Yao Zhang, Xia Qin, Allison Liang, Ellen Kim, Peter Lawrence, Woo Jung Park, Kumar S D Kothapalli, J Thomas Brenna
Fatty acid desaturase 3 (FADS3) is the third member of the FADS gene cluster. FADS1 and FADS2 code for enzymes required for highly unsaturated fatty acid (HUFA) biosynthesis, but FADS3 function remains elusive. We generated the first Fads3 knockout (KO) mouse with an aim to characterize its metabolic phenotype and clues to in vivo function. All mice (wild type (WT) and KO) were fed facility rodent chow devoid of HUFA. No differences in overt phenotypes (survival, fertility, growth rate) were observed. Docosahexaenoic acid (DHA, 22:6n-3) levels in the brain of postnatal day 1 (P1) KO mice were lower than the WT (P < 0...
August 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28807493/homocysteine-and-cognitive-function-in-parkinson-s-disease
#4
Nicole Licking, Charles Murchison, Brenna Cholerton, Cyrus P Zabetian, Shu-Ching Hu, Thomas J Montine, Amie L Peterson-Hiller, Kathryn A Chung, Karen Edwards, James B Leverenz, Joseph F Quinn
INTRODUCTION: Increased plasma homocysteine (HC) is a risk factor for dementia in the general population. Levodopa therapy causes increased plasma HC, but it remains unclear whether elevated plasma HC is associated with cognitive impairment in Parkinson's disease (PD). METHODS: The study population includes all participants in the Pacific Northwest Udall Center (PANUC) Clinical cohort at the time of the study, consisting of 294 individuals with PD who had a standardized neuropsychological assessment and plasma collection for HC measurement...
August 9, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28659301/metabolism-of-uniformly-labeled-13-c-eicosapentaenoic-acid-and-13-c-arachidonic-acid-in-young-and-old-men
#5
Pauline Léveillé, Raphaël Chouinard-Watkins, Anthony Windust, Peter Lawrence, Stephen C Cunnane, J Thomas Brenna, Mélanie Plourde
Background: Plasma eicosapentaenoic acid (EPA) and arachidonic acid (AA) concentrations increase with age.Objective: The aim of this study was to evaluate EPA and AA metabolism in young and old men by using uniformly labeled carbon-13 ((13)C) fatty acids.Design: Six young (∼25 y old) and 6 old (∼75 y old) healthy men were recruited. Each participant consumed a single oral dose of 35 mg (13)C-EPA and its metabolism was followed in the course of 14 d in the plasma and 28 d in the breath. After the washout period of ≥28 d, the same participants consumed a single oral dose of 50 mg (13)C-AA and its metabolism was followed for 28 d in plasma and breath...
August 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28538087/total-brain-and-hippocampal-volumes-and-cognition-in-older-american-indians-the-strong-heart-study
#6
Brenna Cholerton, Adam Omidpanah, Tara M Madhyastha, Thomas J Grabowski, Astrid M Suchy-Dicey, Dean K Shibata, Lonnie A Nelson, Steven P Verney, Barbara V Howard, William T Longstreth, Thomas J Montine, Dedra Buchwald
BACKGROUND: Estimates of hippocampal volume by magnetic resonance imaging have clinical and cognitive correlations and can assist in early Alzheimer disease diagnosis. However, little is known about the relationship between global or regional brain volumes and cognitive test performance in American Indians. MATERIALS AND METHODS: American Indian participants (N=698; median age, 72 y) recruited for the Cerebrovascular Disease and its Consequences in American Indians study, an ancillary study of the Strong Heart Study cohort, were enrolled...
April 2017: Alzheimer Disease and Associated Disorders
https://www.readbyqxmd.com/read/28526295/large-scale-exploratory-genetic-analysis-of-cognitive-impairment-in-parkinson-s-disease
#7
Ignacio F Mata, Catherine O Johnson, James B Leverenz, Daniel Weintraub, John Q Trojanowski, Vivianna M Van Deerlin, Beate Ritz, Rebecca Rausch, Stewart A Factor, Cathy Wood-Siverio, Joseph F Quinn, Kathryn A Chung, Amie L Peterson-Hiller, Alberto J Espay, Fredy J Revilla, Johnna Devoto, Dora Yearout, Shu-Ching Hu, Brenna A Cholerton, Thomas J Montine, Karen L Edwards, Cyrus P Zabetian
Cognitive impairment is a common and disabling problem in Parkinson's disease (PD). Identification of genetic variants that influence the presence or severity of cognitive deficits in PD might provide a clearer understanding of the pathophysiology underlying this important nonmotor feature. We genotyped 1105 PD patients from the PD Cognitive Genetics Consortium for 249,336 variants using the NeuroX array. Participants underwent assessments of learning and memory (Hopkins Verbal Learning Test-Revised [HVLT-R]), working memory/executive function (Letter-Number Sequencing and Trail Making Test [TMT] A and B), language processing (semantic and phonemic verbal fluency), visuospatial abilities (Benton Judgment of Line Orientation [JoLO]), and global cognitive function (Montreal Cognitive Assessment)...
August 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28372335/effects-of-regular-and-long-acting-insulin-on-cognition-and-alzheimer-s-disease-biomarkers-a-pilot-clinical-trial
#8
Suzanne Craft, Amy Claxton, Laura D Baker, Angela J Hanson, Brenna Cholerton, Emily H Trittschuh, Deborah Dahl, Erin Caulder, Bryan Neth, Thomas J Montine, Youngkyoo Jung, Joseph Maldjian, Christopher Whitlow, Seth Friedman
BACKGROUND: Long acting insulin detemir administered intranasally for three weeks enhanced memory for adults with Alzheimer's disease dementia (AD) or amnestic mild cognitive impairment (MCI). The investigation of longer-term administration is necessary to determine whether benefits persist, whether they are similar to benefits provided by regular insulin, and whether either form of insulin therapy affects AD biomarkers. OBJECTIVE: The present study aimed to determine whether four months of treatment with intranasal insulin detemir or regular insulin improves cognition, daily functioning, and AD biomarkers for adults with MCI or AD...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28170420/sustainable-production-of-housefly-musca-domestica-larvae-as-a-protein-rich-feed-ingredient-by-utilizing-cattle-manure
#9
Mahmoud Hussein, Viju V Pillai, Joshua M Goddard, Hui G Park, Kumar S Kothapalli, Deborah A Ross, Quirine M Ketterings, J Thomas Brenna, Mark B Milstein, Helene Marquis, Patricia A Johnson, Jan P Nyrop, Vimal Selvaraj
The common housefly, Musca domestica, is a considerable component of nutrient recycling in the environment. Use of housefly larvae to biodegrade manure presents an opportunity to reduce waste disposal while the rapidly assimilated insect biomass can also be used as a protein rich animal feed. In this study, we examine the biodegradation of dairy cattle manure using housefly larvae, and the nutritional value of the resulting larva meal as a feed ingredient. Our results demonstrated that dairy cattle manure presents a balanced substrate for larval growth, and the spent manure showed reductions in concentration of total nitrogen (24...
2017: PloS One
https://www.readbyqxmd.com/read/28161800/a-strong-developmental-isotope-effect-in-caenorhabditis-elegans-induced-by-5-5-deuterated-lysine
#10
Tatyana V Korneenko, Nikolay B Pestov, Alaksiej L Hurski, Artsiom M Fedarkevich, Vadim V Shmanai, J Thomas Brenna, Mikhail S Shchepinov
Effects exerted by heavy isotope substitution in biopolymers on the functioning of whole organisms have not been investigated. We report on the decrease of permissive temperature of nematodes fed with bacteria containing 5,5-D2-lysine. We synthesized 5,5-dideuterolysine and, taking advantage of lysine being an essential amino acid, showed that C. elegans with modified lysine poorly develop from larvae into fertile adult hermaphrodites. This effect occurs only at high temperature within the permissible range for C...
February 4, 2017: Amino Acids
https://www.readbyqxmd.com/read/28088292/human-fetal-intestinal-epithelial-cells-metabolize-and-incorporate-branched-chain-fatty-acids-in-a-structure-specific-manner
#11
Lei Liu, Zhen Wang, Hui Gyu Park, Chuang Xu, Peter Lawrence, Xueli Su, Vasuki Wijendran, W Allan Walker, Kumar S D Kothapalli, J Thomas Brenna
BACKGROUND: Branched chain fatty acids (BCFA) are constituents of gastrointestinal (GI) tract in healthy newborn human infants, reduce the incidence of necrotizing enterocolitis (NEC) in a neonatal rat model, and are incorporated into small intestine cellular lipids in vivo. We hypothesize that BCFA are taken up, metabolized and incorporated into human fetal cells in vitro. METHODS: Human H4 cells, a fetal non-transformed primary small intestine cell line, were incubated with albumin-bound non-esterified anteiso-17:0, iso-16:0, iso-18:0 and/or iso-20:0, and FA profiles in lipid fractions were analyzed...
January 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/27903517/branched-chain-fatty-acid-composition-of-human-milk-and-the-impact-of-maternal-diet-the-global-exploration-of-human-milk-gehm-study
#12
COMPARATIVE STUDY
Kelly A Dingess, Christina J Valentine, Nicholas J Ollberding, Barbara S Davidson, Jessica G Woo, Suzanne Summer, Yongmei M Peng, M Lourdes Guerrero, Guillermo M Ruiz-Palacios, Rinat R Ran-Ressler, Robert J McMahon, J Thomas Brenna, Ardythe L Morrow
BACKGROUND: An understudied component of the diet, branched-chain fatty acids (BCFAs) are distinctive saturated fatty acids that may have an important influence on health. Human-milk fatty acid composition is known to differ worldwide, but comparative data are lacking on BCFAs. OBJECTIVE: We tested the hypotheses that concentrations of BCFAs in human milk differ between populations and are associated with maternal diet. DESIGN: We surveyed the BCFA composition of samples collected as part of a standardized, prospective study of human-milk composition...
January 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/27899872/type-2-diabetes-cognition-and-dementia-in-older-adults-toward-a-precision-health-approach
#13
Brenna Cholerton, Laura D Baker, Thomas J Montine, Suzanne Craft
IN BRIEF There has been a concurrent dramatic rise in type 2 diabetes and dementia in the United States, and type 2 diabetes shares common genetic and environmental risk factors and underlying pathology with both vascular and Alzheimer's dementias. Given the ability to identify this at-risk population and a variety of potential targeted treatments, type 2 diabetes represents a promising focus for a precision health approach to reduce the impact of cognitive decline and dementia in older adults.
November 2016: Diabetes Spectrum: a Publication of the American Diabetes Association
https://www.readbyqxmd.com/read/27874023/methylphenidate-and-memory-and-attention-adaptation-training-for-persistent-cognitive-symptoms-after-traumatic-brain-injury-a-randomized-placebo-controlled-trial
#14
Brenna C McDonald, Laura A Flashman, David B Arciniegas, Robert J Ferguson, Li Xing, Jaroslaw Harezlak, Gwen C Sprehn, Flora M Hammond, Arthur C Maerlender, Carrie L Kruck, Karen L Gillock, Kim Frey, Rachel N Wall, Andrew J Saykin, Thomas W McAllister
The purpose of this multicenter, prospective, randomized, placebo-controlled study was to evaluate and compare the efficacy of two cognitive rehabilitation interventions (Memory and Attention Adaptation Training (MAAT) and Attention Builders Training (ABT)), with and without pharmacological enhancement (ie, with methylphenidate (MPH) or placebo), for treating persistent cognitive problems after traumatic brain injury (TBI). Adults with a history of TBI at least 4 months before study enrollment with either objective cognitive deficits or subjective cognitive complaints were randomized to receive MPH or placebo and MAAT or ABT, yielding four treatment combinations: MAAT/MPH (N=17), ABT/MPH (N=19), MAAT/placebo (N=17), and ABT/placebo (N=18)...
August 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/27643722/saturated-branched-chain-normal-odd-carbon-numbered-and-n-3-omega-3-polyunsaturated-fatty-acids-in-freshwater-fish-in-the-northeastern-united-states
#15
Dong Hao Wang, James R Jackson, Cornelia Twining, Lars G Rudstam, Emily Zollweg-Horan, Clifford Kraft, Peter Lawrence, Kumar Kothapalli, Zhen Wang, J Thomas Brenna
The fatty acid profiles of wild freshwater fish are poorly characterized as a human food source for several classes of fatty acids, particularly for branched chain fatty acids (BCFA), a major bioactive dietary component known to enter the US food supply primarily via dairy and beef fat. We evaluated the fatty acid content of 27 freshwater fish species captured in the northeastern US with emphasis on the BCFA and bioactive polyunsaturated fatty acids (PUFA) most associated with fish, specifically n-3 (omega-3) eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA)...
October 4, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/27638210/omega-3-long-chain-polyunsaturated-fatty-acids-support-aerial-insectivore-performance-more-than-food-quantity
#16
Cornelia W Twining, J Thomas Brenna, Peter Lawrence, J Ryan Shipley, Troy N Tollefson, David W Winkler
Once-abundant aerial insectivores, such as the Tree Swallow (Tachycineta bicolor), have declined steadily in the past several decades, making it imperative to understand all aspects of their ecology. Aerial insectivores forage on a mixture of aquatic and terrestrial insects that differ in fatty acid composition, specifically long-chain omega-3 polyunsaturated fatty acid (LCPUFA) content. Aquatic insects contain high levels of both LCPUFA and their precursor omega-3 PUFA, alpha-linolenic acid (ALA), whereas terrestrial insects contain much lower levels of both...
September 27, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27571329/association-of-gba-mutations-and-the-e326k-polymorphism-with-motor-and-cognitive-progression-in-parkinson-disease
#17
Marie Y Davis, Catherine O Johnson, James B Leverenz, Daniel Weintraub, John Q Trojanowski, Alice Chen-Plotkin, Vivianna M Van Deerlin, Joseph F Quinn, Kathryn A Chung, Amie L Peterson-Hiller, Liana S Rosenthal, Ted M Dawson, Marilyn S Albert, Jennifer G Goldman, Glenn T Stebbins, Bryan Bernard, Zbigniew K Wszolek, Owen A Ross, Dennis W Dickson, David Eidelberg, Paul J Mattis, Martin Niethammer, Dora Yearout, Shu-Ching Hu, Brenna A Cholerton, Megan Smith, Ignacio F Mata, Thomas J Montine, Karen L Edwards, Cyrus P Zabetian
Importance: Parkinson disease (PD) is heterogeneous in symptom manifestation and rate of progression. Identifying factors that influence disease progression could provide mechanistic insight, improve prognostic accuracy, and elucidate novel therapeutic targets. Objective: To determine whether GBA mutations and the E326K polymorphism modify PD symptom progression. Design, Setting, and Participants: The entire GBA coding region was screened for mutations and E326K in 740 patients with PD enrolled at 7 sites from the PD Cognitive Genetics Consortium...
October 1, 2016: JAMA Neurology
https://www.readbyqxmd.com/read/27478013/alpha-synuclein-snca-polymorphisms-exert-protective-effects-on-memory-after-mild-traumatic-brain-injury
#18
Kevin Shee, Alexandra Lucas, Laura A Flashman, Kwangsik Nho, Gregory J Tsongalis, Brenna C McDonald, Andrew J Saykin, Thomas W McAllister, C Harker Rhodes
Problems with attention and short-term learning and memory are commonly reported after mild traumatic brain injury (mTBI). Due to the known relationships between α-synuclein (SNCA), dopaminergic transmission, and neurologic deficits, we hypothesized that SNCA polymorphisms might be associated with cognitive outcome after mTBI. A cohort of 91 mTBI patients one month after injury and 86 healthy controls completed a series of cognitive tests assessing baseline intellectual function, attentional function, and memory, and was genotyped at 13 common single nucleotide polymorphisms (SNPs) in the SNCA gene...
September 6, 2016: Neuroscience Letters
https://www.readbyqxmd.com/read/27314201/development-of-an-emergency-department-trigger-tool-using-a-systematic-search-and-modified-delphi-process
#19
Richard Thomas Griffey, Ryan M Schneider, Lee M Adler, Roberta Capp, Christopher R Carpenter, Brenna M Farmer, Kathyrn Y Groner, Sheridan Hodkins, Craig A McCammon, Jonathan T Powell, Jonathan E Sather, Jeremiah D Schuur, Marc J Shapiro, Brian R Sharp, Arjun K Venkatesh, Marie C Vrablik, Jennifer L Wiler
OBJECTIVE: This study aimed to develop an emergency department (ED) trigger tool to improve the identification of adverse events in the ED and that can be used to direct patient safety and quality improvement. This work describes the first step toward the development of an ED all-cause harm measurement tool by experts in the field. METHODS: We identified a multidisciplinary group of emergency medicine safety experts from whom we solicited candidate triggers. We then conducted a modified Delphi process consisting of 4 stages as follows: (1) a systematic literature search and review, including an independent oversampling of review for inclusion, (2) solicitation of empiric triggers from participants, (3) a Web-based survey ranking triggers on specific performance constructs, and (4) a final in-person meeting to arrive at consensus triggers for testing...
June 16, 2016: Journal of Patient Safety
https://www.readbyqxmd.com/read/27216536/alternative-splicing-generates-novel-fads3-transcript-in-mice
#20
Ji Yao Zhang, Xia Qin, Hui Gyu Park, Ellen Kim, Guowen Liu, Kumar S D Kothapalli, J Thomas Brenna
Fads3 is the third member of the fatty acid desaturase gene cluster; with at least eight evolutionarily conserved alternative transcripts (AT), having no clearly established function as are known for FADS2 and FADS1. Here we present identification of a novel Fads3 transcript in mice (Fads3AT9), characterize Fads3AT9 expression in mouse tissues and evaluate correlations with metabolite profiles. Total RNA obtained from mouse tissues is reverse-transcribed into cDNA and used as template for PCR reactions. Tissue fatty acids were extracted and quantified by gas chromatography...
August 2016: Molecular Biology Reports
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