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https://www.readbyqxmd.com/read/28325029/noninvasive-eeg-correlates-of-overground-and-stair-walking
#1
Justin A Brantley, Trieu Phat Luu, Recep Ozdemir, Fangshi Zhu, Anna T Winslow, Helen Huang, Jose L Contreras-Vidal
Automated walking intention detection remains a challenge in lower-limb neuroprosthetic systems. Here, we assess the feasibility of extracting motor intent from scalp electroencephalography (EEG). First, we evaluated the corticomuscular coherence between central EEG electrodes (C1, Cz, C2) and muscles of the shank and thigh during walking on level ground and stairs. Second, we trained decoders to predict the linear envelope of the surface electromyogram (EMG). We observed significant EEG-led corticomuscular coupling between electrodes and sEMG (tibialis anterior) in the high delta (3-4 Hz) and low theta (4-5 Hz) frequency bands during level walking, indicating efferent signaling from the cortex to peripheral motor neurons...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324024/thyroid-hormone-receptor-%C3%AE-controls-developmental-timing-and-regulates-the-rate-and-coordination-of-tissue-specific-metamorphosis-in-xenopus-tropicalis
#2
Luan Wen, Yuki Shibata, Dan Su, Liezhen Fu, Nga Luu, Yun-Bo Shi
Thyroid hormone (T3) receptor (TR) mediates the effects of T3 on organ metabolism and animal development. There are two TR genes, TRα and TRβ, in all vertebrates. During animal development, TRα expression is activated earlier than zygotic T3 synthesis and secretion into the plasma, implicating a developmental role of TRα both in the presence and absence of T3. Using T3-dependend amphibian metamorphosis as a model, we have previously proposed a dual functional model for TRs, in particular TRα, during development...
March 14, 2017: Endocrinology
https://www.readbyqxmd.com/read/28323994/direct-regulation-of-histidine-ammonia-lyase-2-gene-by-thyroid-hormone-in-the-developing-adult-intestinal-stem-cells
#3
Nga Luu, Liezhen Fu, Kenta Fujimoto, Yun-Bo Shi
Most vertebrate organs utilize adult stem cells to maintain homeostasis and ensure proper repair when damaged. How such organ-specific stem cells are formed during vertebrate development is largely unexplored. We have been using the thyroid hormone (T3)-dependent amphibian metamorphosis to address this issue. Early studies in Xenopus laevis have shown that intestinal remodeling involves complete degeneration of the larval epithelium and de novo formation of adult stem cells through dedifferentiation of some larval epithelial cells...
February 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28320379/mirnas-associated-with-prostate-cancer-risk-and-progression
#4
REVIEW
Hung N Luu, Hui-Yi Lin, Karina Dalsgaard Sørensen, Olorunseun O Ogunwobi, Nagi Kumar, Ganna Chornokur, Catherine Phelan, Dominique Jones, LaCreis Kidd, Jyotsna Batra, Kosj Yamoah, Anders Berglund, Robert J Rounbehler, Mihi Yang, Sang Haak Lee, Nahyeon Kang, Seung Joon Kim, Jong Y Park, Giuliano Di Pietro
Prostate cancer is the most common malignancy among men in the US. Though considerable improvement in the diagnosis of prostate cancer has been achieved in the past decade, predicting disease outcome remains a major clinical challenge. Recent expression profiling studies in prostate cancer suggest microRNAs (miRNAs) may serve as potential biomarkers for prostate cancer risk and disease progression. miRNAs comprise a large family of about 22-nucleotide-long non-protein coding RNAs, regulate gene expression post-transcriptionally and participate in the regulation of numerous cellular processes...
March 20, 2017: BMC Urology
https://www.readbyqxmd.com/read/28306414/cross-sectional-comparison-of-sleep-disordered-breathing-in-native-peruvian-highlanders-and-lowlanders
#5
Luu V Pham, Christopher Meinzen, Rafael S Arias, Noah G Schwartz, Adi Rattner, Catherine H Miele, Philip L Smith, Hartmut Schneider, J Jaime Miranda, Robert H Gilman, Vsevolod Y Polotsky, William Checkley, Alan R Schwartz
Pham, Luu V., Christopher Meinzen, Rafael S. Arias, Noah G. Schwartz, Adi Rattner, Catherine H. Miele, Philip L. Smith, Hartmut Schneider, J. Jaime Miranda, Robert H. Gilman, Vsevolod Y. Polotsky, William Checkley, and Alan R. Schwartz. Cross-sectional comparison of sleep-disordered breathing in native Peruvian highlanders and lowlanders. High Alt Med Biol. 18:11-19, 2017. BACKGROUND: Altitude can accentuate sleep disordered breathing (SDB), which has been linked to cardiovascular and metabolic diseases...
March 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28302851/structural-basis-of-the-day-night-transition-in-a-bacterial-circadian-clock
#6
Roger Tseng, Nicolette F Goularte, Archana Chavan, Jansen Luu, Susan E Cohen, Yong-Gang Chang, Joel Heisler, Sheng Li, Alicia K Michael, Sarvind Tripathi, Susan S Golden, Andy LiWang, Carrie L Partch
Circadian clocks are ubiquitous timing systems that induce rhythms of biological activities in synchrony with night and day. In cyanobacteria, timing is generated by a posttranslational clock consisting of KaiA, KaiB, and KaiC proteins and a set of output signaling proteins, SasA and CikA, which transduce this rhythm to control gene expression. Here, we describe crystal and nuclear magnetic resonance structures of KaiB-KaiC,KaiA-KaiB-KaiC, and CikA-KaiB complexes. They reveal how the metamorphic properties of KaiB, a protein that adopts two distinct folds, and the post-adenosine triphosphate hydrolysis state of KaiC create a hub around which nighttime signaling events revolve, including inactivation of KaiA and reciprocal regulation of the mutually antagonistic signaling proteins, SasA and CikA...
March 17, 2017: Science
https://www.readbyqxmd.com/read/28293132/stokes-phenomena-in-discrete-painlev%C3%A3-ii
#7
N Joshi, C J Lustri, S Luu
We consider the asymptotic behaviour of the second discrete Painlevé equation in the limit as the independent variable becomes large. Using asymptotic power series, we find solutions that are asymptotically pole-free within some region of the complex plane. These asymptotic solutions exhibit Stokes phenomena, which is typically invisible to classical power series methods. We subsequently apply exponential asymptotic techniques to investigate such phenomena, and obtain mathematical descriptions of the rapid switching behaviour associated with Stokes curves...
February 2017: Proceedings. Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/28288013/new-developments-in-surgery-for-endometriosis-and-pelvic-pain
#8
Thanh Ha Luu, M Jean Uy-Kroh
Endometriosis is a common disease affecting reproductive age women. Pain is one of the most common symptoms associated with endometriosis. When medical therapy has failed or in known deeply infiltrating endometriosis, surgical management is warranted. Laparoscopy is the gold standard for diagnosis and treatment of endometriosis. Recent developments in surgery have shown the feasibility of robotic surgery for endometriosis, although these methods have not been shown to be superior to conventional laparoscopy...
March 10, 2017: Clinical Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28284445/removal-of-antibiotics-in-sponge-membrane-bioreactors-treating-hospital-wastewater-comparison-between-hollow-fiber-and-flat-sheet-membrane-systems
#9
Thanh-Tin Nguyen, Xuan-Thanh Bui, Vinh-Phuc Luu, Phuoc-Dan Nguyen, Wenshan Guo, Huu-Hao Ngo
Hollow fiber (HF) and flat sheet (FS) Sponge MBRs were operated at 10-20 LMH flux treating hospital wastewater. Simultaneous nitrification denitrification (SND) occurred considerably with TN removal rate of 0.011-0.020mg TN mgVSS(-1)d(-1). Furthermore, there was a remarkable removal of antibiotics in both Sponge MBRs, namely Norfloxacin (93-99% (FS); 62-86% (HF)), Ofloxacin (73-93% (FS); 68-93% (HF)), Ciprofloxacin (76-93% (FS); 54-70% (HF)), Tetracycline (approximately 100% for both FS and HF) and Trimethoprim (60-97% (FS); 47-93% (HF)...
March 1, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28281681/chemogenetic-stimulation-of-the-hypoglossal-neurons-improves-upper-airway-patency
#10
Thomaz Fleury Curado, Kenneth Fishbein, Huy Pho, Michael Brennick, Olga Dergacheva, Luiz U Sennes, Luu V Pham, Ellen E Ladenheim, Richard Spencer, David Mendelowitz, Alan R Schwartz, Vsevolod Y Polotsky
Obstructive sleep apnea (OSA) is characterized by recurrent upper airway obstruction during sleep. OSA leads to high cardiovascular morbidity and mortality. The pathogenesis of OSA has been linked to a defect in neuromuscular control of the pharynx. There is no effective pharmacotherapy for OSA. The objective of this study was to determine whether upper airway patency can be improved using chemogenetic approach by deploying designer receptors exclusively activated by designer drug (DREADD) in the hypoglossal motorneurons...
March 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28275149/o-acyl-sugars-protect-a-wild-tobacco-from-both-native-fungal-pathogens-and-a-specialist-herbivore
#11
Van Thi Luu, Alexander Weinhold, Chhana Ullah, Stefanie Dressel, Matthias Schoettner, Klaus Gase, Emmanuel Gaquerel, Shuqing Xu, Ian T Baldwin
O-acyl sugars (O-AS) are abundant trichome-specific metabolites that function as indirect defenses against herbivores of the wild tobacco Nicotiana attenuata; whether they also function as generalized direct defenses against herbivores and pathogens remains unknown. We characterized natural variation in O-AS among 26 accessions and examined their influence on two native fungal pathogens, Fusarium brachygibbosum U4 and Alternaria sp. U10, and the specialist herbivore, Manduca sexta. At least 15 different O-AS structures belonging to three classes were found in N...
March 8, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28270189/characterization-of-the-hla-dr%C3%AE-1-third-hypervariable-region-amino-acid-sequence-according-to-charge-and-parental-inheritance-in-systemic-sclerosis
#12
Coline A Gentil, Hilary S Gammill, Christine T Luu, Maureen D Mayes, Dan E Furst, J Lee Nelson
BACKGROUND: Specific HLA class II alleles are associated with systemic sclerosis (SSc) risk, clinical characteristics, and autoantibodies. HLA nomenclature initially developed with antibodies as typing reagents defining DRB1 allele groups. However, alleles from different DRB1 allele groups encode the same third hypervariable region (3rd HVR) sequence, the primary T-cell recognition site, and 3rd HVR charge differences can affect interactions with T cells. We considered 3rd HVR sequences (amino acids 67-74) irrespective of the allele group and analyzed parental inheritance considered according to the 3rd HVR charge, comparing SSc patients with controls...
March 7, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28268622/unscented-kalman-filter-for-neural-decoding-of-human-treadmill-walking-from-non-invasive-electroencephalography
#13
Trieu Phat Luu, Yongtian He, Sho Nakagame, Jeffrey Gorges, Kevin Nathan, Jose L Contreras-Vidal
The feasibility of decoding lower limb kinematics in human treadmill walking from noninvasive electroencephalography (EEG) has been demonstrated with linear Wiener filter. However, nonlinear relationship between neural activities and limb movements may challenge the linear decoders in real-time brain computer interface (BCI) applications. In this study, we propose a nonlinear neural decoder using an Unscented Kalman Filter (UKF) to infer lower limb joint angles from noninvasive scalp EEG signals during human treadmill walking...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28265721/association-between-type-2-diabetes-and-risk-of-cancer-mortality-a-pooled-analysis-of-over-771-000-individuals-in-the-asia-cohort-consortium
#14
Yu Chen, Fen Wu, Eiko Saito, Yingsong Lin, Minkyo Song, Hung N Luu, Prakash C Gupta, Norie Sawada, Akiko Tamakoshi, Xiao-Ou Shu, Woon-Puay Koh, Yong-Bing Xiang, Yasutake Tomata, Kemmyo Sugiyama, Sue K Park, Keitaro Matsuo, Chisato Nagata, Yumi Sugawara, You-Lin Qiao, San-Lin You, Renwei Wang, Myung-Hee Shin, Wen-Harn Pan, Mangesh S Pednekar, Shoichiro Tsugane, Hui Cai, Jian-Min Yuan, Yu-Tang Gao, Ichiro Tsuji, Seiki Kanemura, Hidemi Ito, Keiko Wada, Yoon-Ok Ahn, Keun-Young Yoo, Habibul Ahsan, Kee Seng Chia, Paolo Boffetta, Wei Zheng, Manami Inoue, Daehee Kang, John D Potter
AIMS/HYPOTHESIS: The aims of the study were to evaluate the association between type 2 diabetes and the risk of death from any cancer and specific cancers in East and South Asians. METHODS: Pooled analyses were conducted of 19 prospective population-based cohorts included in the Asia Cohort Consortium, comprising data from 658,611 East Asians and 112,686 South Asians. HRs were used to compare individuals with diabetes at baseline with those without diabetes for the risk of death from any cancer and from site-specific cancers, including cancers of the oesophagus, stomach, colorectum, colon, rectum, liver, bile duct, pancreas, lung, breast, endometrium, cervix, ovary, prostate, bladder, kidney and thyroid, as well as lymphoma and leukaemia...
March 7, 2017: Diabetologia
https://www.readbyqxmd.com/read/28260422/pre-versus-posttransplant-treatment-of-hepatitis-c-virus-with-direct-acting-antivirals-in-liver-transplant-recipients-more-issues-to-be-solved
#15
Abdelhai Abdelqader, Gokhan Kabacam, Tinsay A Woreta, James P Hamilton, Harry Luu, Kawtar Al Khalloufi, Behnam Saberi, Benjamin Philosophe, Andrew M Cameron, Ahmet Gurakar
OBJECTIVES: Our goal was to investigate wait times related to hepatitis C virus treatment with direct acting antivirals before versus after liver transplant at a single center as well as wait times for insurance approval for preemptive treatment with these agents after liver transplant. MATERIALS AND METHODS: We retrospectively evaluated hepatitis C virus infections in transplant recipients of deceased liver donations in 2014 and 2015. Demographics, hepatocellular carcinoma incidence, Model for End-Stage Liver Disease scores, and transplant wait times were compared between patients treated before or after liver transplant...
February 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/28257856/the-role-of-global-histone-post-translational-modifications-during-mammalian-hibernation
#16
Shannon N Tessier, Bryan E Luu, Jeffrey C Smith, Kenneth B Storey
Mammalian hibernators must cope with hypothermia, ischemia-reperfusion, and finite fuel reserves during days or weeks of continuous torpor. One means of lowering ATP demands during hibernation involves substantial transcriptional controls. The present research analyzed epigenetic regulatory factors as a means of achieving transcriptional control over cycles of torpor-arousal. This study analyzes differential regulation of select histone modifications (e.g. phosphorylation, acetylation, methylation), and identifies post-translational modifications on purified histones using mass spectrometry from thirteen-lined ground squirrels (Ictidomys tridecemlineatus)...
February 28, 2017: Cryobiology
https://www.readbyqxmd.com/read/28253655/effective-fiber-diameter-for-modeling-the-acoustic-properties-of-polydisperse-fiber-networks
#17
Hoang Tuan Luu, Raymond Panneton, Camille Perrot
The purpose of this research is to determine whether the acoustic properties of polydisperse fibrous medium (PDFM) and bidisperse fibrous medium (BDFM) can be modeled by monodisperse fiber media (MDFM) with an effective fiber diameter. Multi-scale numerical simulations on representative elementary volumes of these media are performed to retrieve the transport and geometrical properties governing their acoustic properties. Results show no significant difference between predictions obtained by PDFM or BDFM, and their corresponding effective MDFM...
February 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28245363/anti-inflammatory-coumarins-from-paramignya-trimera
#18
Hoang Le Tuan Anh, Dong-Cheol Kim, Wonmin Ko, Tran Minh Ha, Nguyen Xuan Nhiem, Pham Hai Yen, Bui Huu Tai, Luu Hong Truong, Vu Ngoc Long, Tran Gioi, Tran Hong Quang, Chau Van Minh, Hyuncheol Oh, Youn-Chul Kim, Phan Van Kiem
CONTEXT: Paramignya trimera (Oliv.) Burkill (Rutaceae) has been used to treat liver diseases and cancer. However, the anti-inflammatory effects of this medicinal plant and its components have not been elucidated. OBJECTIVE: This study investigated chemical constituents of the P. trimera stems and evaluated anti-inflammatory effects of isolated compounds. MATERIALS AND METHODS: Cytotoxicity of isolated compounds (5-40 μM) toward BV2 cells was tested using 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT) for 24 h...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28242451/characterisation-of-the-bordetella-pertussis-secretome-under-different-media
#19
Laurence Don Wai Luu, Sophie Octavia, Ling Zhong, Mark Raftery, Vitali Sintchenko, Ruiting Lan
Our understanding of the Bordetella pertussis secretome remains limited including the role of different growth conditions in the secretome. In this study the secretome of L1423, a clinical isolate from the 2008-2012 Australian epidemic, cultured on Stainer-Scholte (SS) and Thalen-IJssel (THIJS) media for 12h was characterised using liquid chromatography-mass spectrometry (LC-MS/MS). In the supernatant, LC-MS/MS identified 260 proteins with 143 bioinformatically predicted to be secreted. Eighty percent of proteins were identified in both media...
February 24, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28240911/comprehensive-enhancement-of-nanostructured-lithium-ion-battery-cathode-materials-via-conformal-graphene-dispersion
#20
Kan-Sheng Chen, Rui Xu, Norman S Luu, Ethan B Secor, Koichi Hamamoto, Qianqian Li, Soo Kim, Vinod K Sangwan, Itamar Balla, Linda M Guiney, Jung-Woo T Seo, Xiankai Yu, Weiwei Liu, Jinsong Wu, Chris Wolverton, Vinayak P Dravid, Scott A Barnett, Jun Lu, Khalil Amine, Mark C Hersam
Efficient energy storage systems based on lithium-ion batteries represent a critical technology across many sectors including consumer electronics, electrified transportation, and a smart grid accommodating intermittent renewable energy sources. Nanostructured electrode materials present compelling opportunities for high-performance lithium-ion batteries, but inherent problems related to the high surface area to volume ratios at the nanometer-scale have impeded their adoption for commercial applications. Here, we demonstrate a materials and processing platform that realizes high-performance nanostructured lithium manganese oxide (nano-LMO) spinel cathodes with conformal graphene coatings as a conductive additive...
February 27, 2017: Nano Letters
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