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https://www.readbyqxmd.com/read/28818092/associations-of-thyroid-hormone-serum-levels-with-in-vivo-alzheimer-s-disease-pathologies
#1
Hyo Jung Choi, Min Soo Byun, Dahyun Yi, Bo Kyung Sohn, Jun Ho Lee, Jun-Young Lee, Yu Kyung Kim, Dong Young Lee
BACKGROUND: The present study investigated the relationships between thyroid hormone serum levels or thyroid-stimulating hormone (TSH) and two Alzheimer's disease (AD)-specific biomarkers, cerebral amyloid beta (Aβ) burden and glucose metabolism, in AD-signature brain regions in cognitively normal (CN) middle-aged and older individuals. METHODS: This study assessed 148 CN individuals who received comprehensive clinical and neuropsychological assessments that included (11)C-Pittsburgh Compound B (PiB)-positron emission tomography (PET) scans, (18)F-deoxyglucose (FDG)-PET scans, and the quantification of serum triiodothyronine (T3), free T3, free thyroxine (fT4), and TSH levels...
August 17, 2017: Alzheimer's Research & Therapy
https://www.readbyqxmd.com/read/28790908/multi-kernel-learning-with-dartel-improves-combined-mri-pet-classification-of-alzheimer-s-disease-in-aibl-data-group-and-individual-analyses
#2
Vahab Youssofzadeh, Bernadette McGuinness, Liam P Maguire, KongFatt Wong-Lin
Magnetic resonance imaging (MRI) and positron emission tomography (PET) are neuroimaging modalities typically used for evaluating brain changes in Alzheimer's disease (AD). Due to their complementary nature, their combination can provide more accurate AD diagnosis or prognosis. In this work, we apply a multi-modal imaging machine-learning framework to enhance AD classification and prediction of diagnosis of subject-matched gray matter MRI and Pittsburgh compound B (PiB)-PET data related to 58 AD, 108 mild cognitive impairment (MCI) and 120 healthy elderly (HE) subjects from the Australian imaging, biomarkers and lifestyle (AIBL) dataset...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28780367/differential-effects-of-blood-insulin-and-hba1c-on-cerebral-amyloid-burden-and-neurodegeneration-in-nondiabetic-cognitively-normal-older-adults
#3
Min Soo Byun, Hyun Jung Kim, Dahyun Yi, Hyo Jung Choi, Hyewon Baek, Jun Ho Lee, Young Min Choe, Bo Kyung Sohn, Jun-Young Lee, Younghwa Lee, Hyunwoong Ko, Yu Kyeong Kim, Yun-Sang Lee, Chul-Ho Sohn, Jong Inn Woo, Dong Young Lee
We tested the hypothesis that lower insulin or higher glycated hemoglobin (HbA1c) levels in blood are associated with increased cerebral beta amyloid (Aβ) deposition and neurodegeneration in nondiabetic cognitively normal (CN) older adults. A total of 205 nondiabetic CN older adults underwent comprehensive clinical assessment, [(11)C]Pittsburgh compound B (PiB)-positron emission tomography (PET), [(18)F]fluorodeoxyglucose-PET, magnetic resonance imaging, and blood sampling for fasting insulin and HbA1c measurement...
July 20, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28777752/urine-ad7c-ntp-predicts-amyloid-deposition-and-symptom-of-agitation-in-patients-with-alzheimer-s-disease-and-mild-cognitive-impairment
#4
Nan Zhang, Liling Zhang, Yan Li, Marc L Gordon, Li Cai, Ying Wang, Mengya Xing, Yan Cheng
BACKGROUND: Expression of neuronal thread protein (NTP), which is considered to be related to neuritic sprouting and neuronal death, may be elevated in brain tissue, cerebrospinal fluid, and even urine in patients with Alzheimer's disease (AD). OBJECTIVE: In this study, we analyzed the correlation between urine AD-associated NTP (AD7c-NTP) level, and amyloid-β (Aβ) deposition, and clinical symptoms in AD and mild cognitive impairment (MCI). METHODS: Twenty-two patients with mild to moderate AD and 8 subjects with MCI were recruited...
July 29, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28760847/the-tetr-family-transcriptional-regulator-pccd-negatively-controls-propionyl-coenzyme-a-assimilation-in-saccharopolyspora-erythraea
#5
Zhen Xu, Miaomiao Wang, Bang-Ce Ye
Propanol stimulates erythromycin biosynthesis by increasing the supply of propionyl-CoA, a starter unit of erythromycin production in Saccharopolyspora erythraea Propionyl-CoA is assimilated via propionyl-CoA carboxylase to methylmalonyl-CoA, an extender unit of erythromycin. We found that the addition of n-propanol or propionate caused a 4-16 fold increase in the transcriptional levels of the SACE_3398-3400 locus encoding propionyl-CoA carboxylase, a key enzyme in propionate metabolism. The regulator PccD was proved to be directly involved in the transcription regulation of SACE_3398-3400 locus by EMSAs and DNase I footprint analysis...
July 31, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28753552/overexpression-of-c-myc-enhances-recombinant-protein-production-in-high-five-cells-after-baculovirus-infection
#6
Xiaoli Ju, Meijia Ren, Keping Chen, Qiang Wang
Due to their numerous advantages, baculovirus expression vector systems (BEVS) have been widely used to express recombinant proteins for different purposes. Different strategies have been adopted to increase recombinant protein production. In this study, we transiently or stably expressed mouse c-Myc in High Five cells using a commercial pIB/V5 vector. Under the control of the OpIE2 promoter, this vector could enhance recombinant protein production. We found that transient expression of c-Myc in High Five cells improved recombinant protein production...
July 28, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28721032/-11-c-pib-pet-imaging-reveals-that-amyloid-deposition-in-cases-with-early-onset-alzheimer-s-disease-in-the-absence-of-known-mutations-retains-higher-levels-of-pib-in-the-basal-ganglia
#7
Young Chul Youn, Jae-Won Jang, Su-Hyun Han, HyeRyoun Kim, Ju-Won Seok, Jun Soo Byun, Kwang-Yeol Park, Seong Soo A An, In Kook Chun, SangYun Kim
PURPOSE: Early-onset Alzheimer's disease (EOAD) has a different pathologic burden and clinical features compared with late-onset Alzheimer's disease (LOAD). We examined the effects of age at onset on the burden and distribution of β-amyloid in patients with EOAD, in whom well-characterized mutations associated with Alzheimer's disease were absent. METHODS: We genotyped ApoE, APP, PSEN1 and PSEN2 in the patients with Alzheimer's disease: 9 patients with EOAD (age <65), 11 with LOAD (age >70) and 8 normal controls (NCs), all of whom had undergone (11)C-labeled Pittsburgh compound B-positron emission tomography imaging...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/28715708/the-evaluation-of-brain-perfusion-spect-using-an-easy-z-score-imaging-system-in-the-mild-cognitive-impairment-subjects-with-brain-amyloid-%C3%AE-deposition
#8
Makoto Takemaru, Noriyuki Kimura, Yoshitake Abe, Megumi Goto, Etsuro Matsubara
OBJECTIVE: The analysis of (99)mTc-ECD single-photon emission computed tomography (SPECT) images using the easy Z-score imaging system (eZIS) program is useful for the diagnosis of early AD in daily medical practice. However, it remains unclear whether eZIS analysis can identify the amnestic mild cognitive impairment (MCI) subjects with brain amyloid-β deposition. The aim of this study was to evaluate the usefulness of an eZIS analysis for predicting amnestic MCI subjects with brain amyloid β deposition...
September 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28715661/cognitive-decline-and-brain-amyloid-%C3%AE-accumulation-across-3-years-in-adults-with-down-syndrome
#9
Sigan L Hartley, Benjamin L Handen, Darlynne Devenny, Iulia Mihaila, Regina Hardison, Patrick J Lao, William E Klunk, Peter Bulova, Sterling C Johnson, Bradley T Christian
Adults with Down syndrome (DS) have a high incidence of Alzheimer's disease (AD), providing a unique opportunity to explore the early, preclinical stages of AD neuropathology. We examined change in brain amyloid-β accumulation via the positron emission tomography tracer [11C] Pittsburgh compound B (PiB) across 2 data collection cycles, spaced 3 years apart, and decline in cognitive functioning in 58 adults with DS without clinical AD. PiB retention increased in the anterior cingulate gyrus, precuneus cortex, parietal cortex, and anterior ventral striatum...
June 2, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28702566/a-titanium-based-metal-organic-framework-as-an-ultralong-cycle-life-anode-for-pibs
#10
Yongling An, Huifang Fei, Zhen Zhang, Lijie Ci, Shenglin Xiong, Jinkui Feng
We achieved excellent anode performance for PIBs based on a metal-organic framework MIL-125(Ti) for the first time. It can deliver a capacity of 208 mA h g(-1) at a rate of 10 mA g(-1) and a high capacity retention of 90.2% after 2000 cycles at a high rate of 200 mA g(-1) with a high coulombic efficiency. The K(+) storage mechanism is investigated by the ex situ XRD and IR techniques and confirms that potassium ions are reversibly inserted into the organic moiety without direct engagement of Ti ions.
July 12, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28700216/accelerated-lifetime-testing-of-organic-inorganic-perovskite-solar-cells-encapsulated-by-polyisobutylene
#11
Lei Shi, Trevor L Young, Jincheol Kim, Yun Sheng, Lei Wang, Yifeng Chen, Zhiqiang Feng, Mark J Keevers, Xiaojing Hao, Pierre J Verlinden, Martin A Green, Anita W Y Ho-Baillie
Metal halide perovskite solar cells (PSCs) have undergone rapid progress. However, unstable performance caused by sensitivity to environmental moisture and high temperature is a major impediment to commercialization of PSCs. In the present work, a low-temperature, glass-glass encapsulation technique using high performance polyisobutylene (PIB) as the moisture barrier is investigated on planar glass/FTO/TiO2/FAPbI3/PTAA/gold perovskite solar cells. PIB was applied as either an edge seal or blanket layer. Electrical connections to the encapsulated PSCs were provided by either the FTO or Au layers...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28671117/a-cross-validation-of-fdg-and-amyloid-pet-biomarkers-in-mild-cognitive-impairment-for-the-risk-prediction-to-dementia-due-to-alzheimer-s-disease-in-a-clinical-setting
#12
Leonardo Iaccarino, Konstantinos Chiotis, Pierpaolo Alongi, Ove Almkvist, Anders Wall, Chiara Cerami, Valentino Bettinardi, Luigi Gianolli, Agneta Nordberg, Daniela Perani
Assessments of brain glucose metabolism (18F-FDG-PET) and cerebral amyloid burden (11C-PiB-PET) in mild cognitive impairment (MCI) have shown highly variable performances when adopted to predict progression to dementia due to Alzheimer's disease (ADD). This study investigates, in a clinical setting, the separate and combined values of 18F-FDG-PET and 11C-PiB-PET in ADD conversion prediction with optimized data analysis procedures. Respectively, we investigate the accuracy of an optimized SPM analysis for 18F-FDG-PET and of standardized uptake value ratio semiquantification for 11C-PiB-PET in predicting ADD conversion in 30 MCI subjects (age 63...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28671114/associations-of-caide-dementia-risk-score-with-mri-pib-pet-measures-and%C3%A2-cognition
#13
Ruth Stephen, Yawu Liu, Tiia Ngandu, Juha O Rinne, Nina Kemppainen, Riitta Parkkola, Tiina Laatikainen, Teemu Paajanen, Tuomo Hänninen, Timo Strandberg, Riitta Antikainen, Jaakko Tuomilehto, Sirkka Keinänen Kiukaanniemi, Ritva Vanninen, Seppo Helisalmi, Esko Levälahti, Miia Kivipelto, Hilkka Soininen, Alina Solomon
BACKGROUND: CAIDE Dementia Risk Score is the first validated tool for estimating dementia risk based on a midlife risk profile. OBJECTIVES: This observational study investigated longitudinal associations of CAIDE Dementia Risk Score with brain MRI, amyloid burden evaluated with PIB-PET, and detailed cognition measures. METHODS: FINGER participants were at-risk elderly without dementia. CAIDE Risk Score was calculated using data from previous national surveys (mean age 52...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28670464/diagnostic-value-of-blood-thiamine-metabolites-in-alzheimer-s-disease-examined-by-11-c-pib-pet-scanning
#14
Zhichun Chen, Xiaoli Pan, Guoqiang Fei, Shumei Pan, Weiqi Bao, Shuhua Ren, Yihui Guan, Chunjiu Zhong
AIM: We evaluated the diagnostic value of blood thiamine metabolites for Alzheimer's disease (AD) by using positron emission tomography with (11)C-Pittsburgh compound B ((11)C-PiB PET) scanning. METHODS: Thirty-eight clinically diagnosed AD patients were voluntarily recruited. Blood thiamine metabolites were measured by high-performance liquid chromatography. All the patients received (11)C-PiB PET scanning for the measurement of cerebral amyloid deposition. RESULTS: Thiamine diphosphate (TDP) had 66...
June 2017: Future Science OA
https://www.readbyqxmd.com/read/28661060/decreased-glutamate-levels-in-patients-with-amnestic-mild-cognitive-impairment-an-slaser-proton-mr-spectroscopy-and-pib-pet-study
#15
Burcu Zeydan, Dinesh K Deelchand, Nirubol Tosakulwong, Timothy G Lesnick, Orhun H Kantarci, Mary M Machulda, David S Knopman, Val J Lowe, Clifford R Jack, Ronald C Petersen, Gülin Öz, Kejal Kantarci
BACKGROUND AND PURPOSE: Glutamate levels may be informative about the declining neuronal health in the central nervous system. We used an advanced proton MR spectroscopy ((1) H-MRS) protocol composed of semi-localization by adiabatic selective refocusing (sLASER) localization and FAST(EST)MAP shimming for detection of alterations in brain glutamate concentrations in patients with amnestic mild cognitive impairment. METHODS: Participants with amnestic mild cognitive impairment (n = 14; median age = 80) and age- and sex-matched clinically normal controls (n = 32; median age = 79) from the population-based Mayo Clinic Study of Aging were recruited prospectively to the 3T single-voxel (1) H-MRS study that examined metabolite changes in the posterior cingulate gyri...
June 29, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28659161/associations-between-cerebral-amyloid-and-changes-in-cognitive-function-and-falls-risk-in-subcortical-ischemic-vascular-cognitive-impairment
#16
Elizabeth Dao, John R Best, Ging-Yuek Robin Hsiung, Vesna Sossi, Claudia Jacova, Roger Tam, Teresa Liu-Ambrose
BACKGROUND: To determine the association between amyloid-beta (Aβ) plaque deposition and changes in global cognition, executive functions, information processing speed, and falls risk over a 12-month period in older adults with a primary clinical diagnosis of subcortical ischemic vascular cognitive impairment (SIVCI). METHODS: This is a secondary analysis of data acquired from a subset of participants (N = 22) who were enrolled in a randomized controlled trial of aerobic exercise (NCT01027858)...
June 28, 2017: BMC Geriatrics
https://www.readbyqxmd.com/read/28653036/assessment-of-amyloid-%C3%AE-in-pathologically-confirmed-frontotemporal-dementia-syndromes
#17
Rachel H Tan, Jillian J Kril, Yue Yang, Nicole Tom, John R Hodges, Victor L Villemagne, Christopher C Rowe, Cristian E Leyton, John B J Kwok, Lars M Ittner, Glenda M Halliday
INTRODUCTION: The diagnostic utility of in vivo amyloid β (Aβ) imaging to aid in the clinical distinction between frontotemporal dementia (FTD) and Alzheimer's disease remains unclear without data on the prevalence and severity of Aβ in pathologically confirmed FTD syndromes. METHODS: Aβ was assessed in 98 autopsy-confirmed FTD and 36 control cases, and the pathological accuracy of (11)C-Pittsburgh compound B (PiB)-positron emission tomography imaging was assessed in a subset of FTD cases (n = 15)...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28643043/-18-f-florbetaben-pet-beta-amyloid-binding-expressed-in-centiloids
#18
Christopher C Rowe, Vincent Doré, Gareth Jones, David Baxendale, Rachel S Mulligan, Santiago Bullich, Andrew W Stephens, Susan De Santi, Colin L Masters, Ludger Dinkelborg, Victor L Villemagne
PURPOSE: The Centiloid (CL) method enables quantitative values from Aβ-amyloid (Aβ) imaging to be expressed in a universal unit providing pathological, diagnostic and prognostic thresholds in clinical practice and research and allowing integration of multiple tracers and methods. The method was developed for (11)C-PiB scans with zero CL set as the average in young normal subjects and 100 CL the average in subjects with mild Alzheimer's disease (AD). The method allows derivation of equations to convert the uptake value of any tracer into the same standard CL units but first requires head-to-head comparison with (11)C-PiB results...
June 22, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28639126/a-comparison-of-five-partial-volume-correction-methods-for-tau-and-amyloid-pet-imaging-with-18-f-thk5351-and-11-c-pib
#19
Miho Shidahara, Benjamin A Thomas, Nobuyuki Okamura, Masanobu Ibaraki, Keisuke Matsubara, Senri Oyama, Yoichi Ishikawa, Shoichi Watanuki, Ren Iwata, Shozo Furumoto, Manabu Tashiro, Kazuhiko Yanai, Kohsuke Gonda, Hiroshi Watabe
PURPOSE: To suppress partial volume effect (PVE) in brain PET, there have been many algorithms proposed. However, each methodology has different property due to its assumption and algorithms. Our aim of this study was to investigate the difference among partial volume correction (PVC) method for tau and amyloid PET study. METHODS: We investigated two of the most commonly used PVC methods, Müller-Gärtner (MG) and geometric transfer matrix (GTM) and also other three methods for clinical tau and amyloid PET imaging...
June 21, 2017: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/28627077/phase-separable-polyisobutylene-palladium-peppsi-precatalysts-synthesis-and-application-in-buchwald-hartwig-amination
#20
Janos Balogh, Antsar Rih Hlil, Ibrahim El-Zoghbi, Muhammad Ghufran Rafique, Dalila Chouikhi, Mohammed Al-Hashimi, Hassan S Bazzi
This paper reports the efficient synthesis of the first class of polyisobutylene(PIB)-supported palladium-PEPPSI precatalyst (PEPPSI = pyridine-enhanced precatalyst preparation, stabilization, and initiation). The new complexes are employed in Buchwald-Hartwig amination of aryl chlorides and are found to be reasonably active in the titled cross-coupling reaction. The supported catalysts are tested in polar (1,4-dioxane and 1,2-dimethoxyethane) as well as in aliphatic reaction media (toluene and n-heptane) and display superior activity in the highly lipophilic solvent (n-heptane)...
August 2017: Macromolecular Rapid Communications
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