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JOURNAL ARTICLE
Daniela Dudysová, Karolina Janků, Marek Piorecký, Veronika Hantáková, Mária Orendáčová, Václava Piorecká, Jan Štrobl, Monika Kliková, Hong-Viet V Ngo, Jana Kopřivová
Insomnia is a prevalent and disabling condition whose treatment is not always effective. This pilot study explores the feasibility and effects of closed-loop auditory stimulation (CLAS) as a potential non-invasive intervention to improve sleep, its subjective quality, and memory consolidation in patients with insomnia. A total of 27 patients with chronic insomnia underwent a crossover, sham-controlled study with 2 nights of either CLAS or sham stimulation. Polysomnography was used to record sleep parameters, while questionnaires and a word-pair memory task were administered to assess subjective sleep quality and memory consolidation...
March 11, 2024: Journal of Sleep Research
#2
JOURNAL ARTICLE
Clara Sayk, Sophia Saftien, Nicole Koch, Hong-Viet V Ngo, Klaus Junghanns, Ines Wilhelm
Nightmares are common among the general population and psychiatric patients and have been associated with signs of nocturnal arousal such as increased heart rate or increased high-frequency electroencephalographic (EEG) activity. However, it is still unclear, whether these characteristics are more of a trait occurring in people with frequent nightmares or rather indicators of the nightmare state. We compared participants with frequent nightmares (NM group; n = 30) and healthy controls (controls; n = 27) who spent 4 nights in the sleep laboratory over the course of 8 weeks...
September 9, 2023: Journal of Sleep Research
#3
REVIEW
Mahdad Jafarzadeh Esfahani, Soha Farboud, Hong-Viet V Ngo, Jules Schneider, Frederik D Weber, Lucia Talamini, Martin Dresler
Sleep is essential for our physical and mental well-being. During sleep, despite the paucity of overt behavior, our brain remains active and exhibits a wide range of coupled brain oscillations. In particular slow oscillations are characteristic for sleep, however whether they are directly involved in the functions of sleep, or are mere epiphenomena, is not yet fully understood. To disentangle the causality of these relationships, experiments utilizing techniques to detect and manipulate sleep oscillations in real time are essential...
September 1, 2023: Neuroscience and Biobehavioral Reviews
#4
MULTICENTER STUDY
Tuan Anh Nguyen, Ton Duy Mai, Luu Dang Vu, Co Xuan Dao, Hung Manh Ngo, Hai Bui Hoang, Tuan Anh Tran, Trang Quynh Pham, Dung Thi Pham, My Ha Nguyen, Linh Quoc Nguyen, Phuong Viet Dao, Duong Ngoc Nguyen, Hien Thi Thu Vuong, Hung Dinh Vu, Dong Duc Nguyen, Thanh Dang Vu, Dung Tien Nguyen, Anh Le Ngoc Do, Quynh Thi Pham, Nhung Hong Khuat, Ninh Van Duong, Cong Chi Ngo, Son Ngoc Do, Hao The Nguyen, Chi Van Nguyen, Anh Dat Nguyen, Chinh Quoc Luong
OBJECTIVES: To investigate the impact of intracerebral haematoma (ICH) on the outcomes and the factors related to an ICH in patients with aneurysmal subarachnoid haemorrhage (aSAH) in a low- and middle-income country. DESIGN: A multicentre prospective cohort study. SETTING: Three central hospitals in Hanoi, Vietnam. PARTICIPANTS: This study included all patients (≥18 years) presenting with aSAH to the three central hospitals within 4 days of ictus, from August 2019 to June 2021, and excluded patients for whom the admission Glasgow Coma Scale was unable to be scored or patients who became lost at 90 days of follow-up during the study...
April 21, 2023: BMJ Open
#5
JOURNAL ARTICLE
Muzamil Mahdi Abdel Hamid, Mohamed Hassan Abdelraheem, Desmond Omane Acheampong, Ambroise Ahouidi, Mozam Ali, Jacob Almagro-Garcia, Alfred Amambua-Ngwa, Chanaki Amaratunga, Lucas Amenga-Etego, Ben Andagalu, Tim Anderson, Voahangy Andrianaranjaka, Ifeyinwa Aniebo, Enoch Aninagyei, Felix Ansah, Patrick O Ansah, Tobias Apinjoh, Paulo Arnaldo, Elizabeth Ashley, Sarah Auburn, Gordon A Awandare, Hampate Ba, Vito Baraka, Alyssa Barry, Philip Bejon, Gwladys I Bertin, Maciej F Boni, Steffen Borrmann, Teun Bousema, Marielle Bouyou-Akotet, Oralee Branch, Peter C Bull, Huch Cheah, Keobouphaphone Chindavongsa, Thanat Chookajorn, Kesinee Chotivanich, Antoine Claessens, David J Conway, Vladimir Corredor, Erin Courtier, Alister Craig, Umberto D'Alessandro, Souleymane Dama, Nicholas Day, Brigitte Denis, Mehul Dhorda, Mahamadou Diakite, Abdoulaye Djimde, Christiane Dolecek, Arjen Dondorp, Seydou Doumbia, Chris Drakeley, Eleanor Drury, Patrick Duffy, Diego F Echeverry, Thomas G Egwang, Sonia Maria Mauricio Enosse, Berhanu Erko, Rick M Fairhurst, Abdul Faiz, Caterina A Fanello, Mark Fleharty, Matthew Forbes, Mark Fukuda, Dionicia Gamboa, Anita Ghansah, Lemu Golassa, Sonia Goncalves, G L Abby Harrison, Sara Anne Healy, Jason A Hendry, Anastasia Hernandez-Koutoucheva, Tran Tinh Hien, Catherine A Hill, Francis Hombhanje, Amanda Hott, Ye Htut, Mazza Hussein, Mallika Imwong, Deus Ishengoma, Scott A Jackson, Chris G Jacob, Julia Jeans, Kimberly J Johnson, Claire Kamaliddin, Edwin Kamau, Jon Keatley, Theerarat Kochakarn, Drissa S Konate, Abibatou Konaté, Aminatou Kone, Dominic P Kwiatkowski, Myat P Kyaw, Dennis Kyle, Mara Lawniczak, Samuel K Lee, Martha Lemnge, Pharath Lim, Chanthap Lon, Kovana M Loua, Celine I Mandara, Jutta Marfurt, Kevin Marsh, Richard James Maude, Mayfong Mayxay, Oumou Maïga-Ascofaré, Olivo Miotto, Toshihiro Mita, Victor Mobegi, Abdelrahim Osman Mohamed, Olugbenga A Mokuolu, Jaqui Montgomery, Collins Misita Morang'a, Ivo Mueller, Kathryn Murie, Paul N Newton, Thang Ngo Duc, Thuy Nguyen, Thuy-Nhien Nguyen, Tuyen Nguyen Thi Kim, Hong Nguyen Van, Harald Noedl, Francois Nosten, Rintis Noviyanti, Vincent Ntui-Njock Ntui, Alexis Nzila, Lynette Isabella Ochola-Oyier, Harold Ocholla, Abraham Oduro, Irene Omedo, Marie A Onyamboko, Jean-Bosco Ouedraogo, Kolapo Oyebola, Wellington Aghoghovwia Oyibo, Richard Pearson, Norbert Peshu, Aung P Phyo, Christopher V Plowe, Ric N Price, Sasithon Pukrittayakamee, Huynh Hong Quang, Milijaona Randrianarivelojosia, Julian C Rayner, Pascal Ringwald, Anna Rosanas-Urgell, Eduard Rovira-Vallbona, Valentin Ruano-Rubio, Lastenia Ruiz, David Saunders, Alex Shayo, Peter Siba, Victoria J Simpson, Mahamadou S Sissoko, Christen Smith, Xin-Zhuan Su, Colin Sutherland, Shannon Takala-Harrison, Arthur Talman, Livingstone Tavul, Ngo Viet Thanh, Vandana Thathy, Aung Myint Thu, Mahamoudou Toure, Antoinette Tshefu, Federica Verra, Joseph Vinetz, Thomas E Wellems, Jason Wendler, Nicholas J White, Georgia Whitton, William Yavo, Rob W van der Pluijm
We describe the MalariaGEN Pf7 data resource, the seventh release of Plasmodium falciparum genome variation data from the MalariaGEN network. It comprises over 20,000 samples from 82 partner studies in 33 countries, including several malaria endemic regions that were previously underrepresented. For the first time we include dried blood spot samples that were sequenced after selective whole genome amplification, necessitating new methods to genotype copy number variations. We identify a large number of newly emerging crt mutations in parts of Southeast Asia, and show examples of heterogeneities in patterns of drug resistance within Africa and within the Indian subcontinent...
2023: Wellcome Open Research
#6
REVIEW
Hong-Viet V Ngo, Henrik Oster, Christina Andreou, Jonas Obleser
Circadian rhythms are imprinted in all organisms and influence virtually all aspects of physiology and behaviour in adaptation to the 24-hour day-night cycle. This recognition of a circadian timekeeping system permeating essentially all healthy functioning of body and mind quickly leads to the realisation that, in turn, human ailments should be probed for the degree to which they are rooted in or marked by disruptions and dysregulations of circadian clock functions in the human body. In this review, we will focus on psychosis as a key mental illness and foremost one of its cardinal symptoms: auditory hallucinations...
February 6, 2023: Acta Physiologica
#7
JOURNAL ARTICLE
Hong-Viet V Ngo, Bernhard P Staresina
Sleep constitutes a privileged state for new memories to reactivate and consolidate. Previous work has demonstrated that consolidation can be bolstered experimentally either via delivery of reminder cues (targeted memory reactivation [TMR]) or via noninvasive brain stimulation geared toward enhancing endogenous sleep rhythms. Here, we combined both approaches, controlling the timing of TMR cues with respect to ongoing slow-oscillation (SO) phases. Prior to sleep, participants learned associations between unique words and a set of repeating images (e...
November 2022: Proceedings of the National Academy of Sciences of the United States of America
#8
REVIEW
Hong-Viet V Ngo, James W Antony, Björn Rasch
Real-time brain stimulation is a powerful technique that continues to gain importance in the field of sleep and cognition. In this special issue, we collected 14 articles about real-time stimulation during sleep, including one review, 12 research articles and one letter covering both human and rodent research from various fields. We hope this special issue sparks greater interest and inspires fellow sleep researchers and clinicians to develop new ideas in the exciting topic of real-time stimulation.
December 2022: Journal of Sleep Research
#9
JOURNAL ARTICLE
Hong-Viet V Ngo, Jan Born, Jens G Klinzing
Several epilepsies are characterized by interictal spikes in the electroencephalogram occurring preferentially during sleep. We present a closed-loop auditory stimulation protocol with potential for treating sleep epilepsies. We describe the pre-sleep preparations, sleep recordings, the auditory stimulation, in which tones are triggered upon spike detection, and post-sleep procedures. This protocol has been shown to decrease likelihood and amplitude of subsequent spikes in patients with BECTS (Benign epilepsy with centrotemporal spikes) and can be applied to study non-pharmacological treatments of sleep epilepsies...
September 16, 2022: STAR protocols
#10
REVIEW
Tuan D Tran, Phuc M Vu, Hong T M Pham, Luan N Au, Hung P Do, Hoa T T Doan, Nghia Huynh, Quynh T V Huynh, Bao K Le, Dat Q Ngo, Hanh T M Nguyen, Khanh D Nguyen, Nghia A Nguyen, Phong H Nguyen, Tuan A Nguyen, Thang C Tran, Hoa N Chau, Lan N Vuong, Nu V Vu
The competency-based undergraduate curriculum reform at the University of Medicine and Pharmacy at Ho Chi Minh City, Faculty of Medicine (UMP-FM) is detailed and reviewed in reference to the instructional and institutional reforms, and enabling actions recommended by the Lancet 2010 Commission for Health Professional Education. Key objectives are to: revise the overall 6-year curriculum to be more integrated and competency-based; reinforce students' knowledge application, problem-solving, clinical competence, self-directed learning and soft skills; develop a comprehensive and performance-based student assessment programme; and establish a comprehensive quality monitoring programme to facilitate changes and improvements...
October 2022: The Lancet Regional Health. Western Pacific
#11
JOURNAL ARTICLE
Thanh V Kim, Duc H Le, Diem V B Dao, Trang Ngoc Doan Pham, Gary W Mize, Loc T B Phan, Dan X Nguyen, Thi-Thuy-Dung Ngo, Robert G Gish, William M Lee, Amy Trang, Anh N Le, Moon Chen, Hai T Phan, Binh T Nguyen, Hong K Tang, Doan Y Dao
Background: A baseline of hepatitis C virus (HCV) burden and other HCV epidemiological profiles is necessary for HCV micro-elimination in Ho Chi Minh City (HCMC), Viet Nam. This study aimed to determine HCV exposure and prevalence of HCV viremia as well as the proportion of HCV testing and treatment uptake among participants. Methods: From 2019 to 2020, the probability proportionate to size sampling method was deployed to representatively invite approximately 20,000 adults (18 or older) throughout HCMC to free screening and linkage to care for HCV...
October 2022: The Lancet Regional Health. Western Pacific
#12
JOURNAL ARTICLE
Sara Lena Weinhold, Julia Lechinger, Nele Timm, Anja Hansen, Hong-Viet V Ngo, Robert Göder
Sleep-dependent memory consolidation is disturbed in patients with schizophrenia, who furthermore show reductions in sleep spindles and probably also in delta power during sleep. The memory dysfunction in these patients is one of the strongest markers for worse long-term functional outcome. However, therapeutic interventions to normalise memory functions, e.g., with medication, still do not exist. Against this backdrop, we investigated to what extent a non-invasive approach enhancing sleep with real-time auditory stimulation in-phase with slow oscillations might affect overnight memory consolidation in patients with schizophrenia...
June 9, 2022: Journal of Sleep Research
#13
JOURNAL ARTICLE
Hoang Nhan Ho, Hoang Hao Le, Thien Giap Le, Thi Hong Anh Duong, Viet Quynh Tram Ngo, Cong Thuan Dang, Van Minh Nguyen, Tuan Hiep Tran, Chien Ngoc Nguyen
Local delivery of drug is a promising strategy to manage periodontitis characterized by chronic inflammation of the soft tissue surrounding the teeth. An optimized system should prolong the drug retention time and exhibit controlled drug permeation through the buccal mucosal layer. This study was aimed to develop hydroxyethyl cellulose (HEC)-based gel containing metronidazole (MTZ) loaded in solid lipid nanoparticles (SLNs), and to enhance the antimicrobial activity of MTZ. SLNs were prepared using a combination method of solvent evaporation and hot homogenization...
January 1, 2022: International Journal of Biological Macromolecules
#14
JOURNAL ARTICLE
Jens G Klinzing, Lilian Tashiro, Susanne Ruf, Markus Wolff, Jan Born, Hong-Viet V Ngo
Benign epilepsy with centrotemporal spikes (BECTS) is a common form of childhood epilepsy linked to diverse cognitive abnormalities. The electroencephalogram of patients shows focal interictal epileptic spikes, particularly during non-rapid eye movement (NonREM) sleep. Spike formation involves thalamocortical networks, which also contribute to the generation of sleep slow oscillations (SOs) and spindles. Motivated by evidence that SO-spindle activity can be controlled through closed-loop auditory stimulation, here, we show in seven patients that auditory stimulation also reduces spike rates in BECTS...
November 16, 2021: Cell reports medicine
#15
JOURNAL ARTICLE
Marcus O Harrington, Hong-Viet V Ngo, Scott A Cairney
Auditory closed-loop stimulation has gained traction in recent years as a means of enhancing slow oscillatory activity and, consequently, sleep-associated memory consolidation. Previous studies on this topic have primarily focused on the consolidation of semantically-congruent associations. In this study, we investigated the effect of auditory closed-loop stimulation on the overnight retention of semantically-incongruent associations. Twelve healthy males (age: M=20.06, SD=2.02 years) participated in two experimental conditions (simulation and sham)...
June 25, 2021: Neurobiology of Learning and Memory
#16
JOURNAL ARTICLE
Hong-Viet V Ngo, Jurgen Claassen, Martin Dresler
The accumulation of amyloid-β, a metabolic residue found in the brain, has been linked to cognitive ageing and Alzheimer's disease. A longitudinal study reveals that the increase of amyloid-β can be predicted using simple sleep parameters.
November 16, 2020: Current Biology: CB
#17
JOURNAL ARTICLE
Marcus O Harrington, Jennifer E Ashton, Hong-Viet V Ngo, Scott A Cairney
Auditory closed-loop stimulation is a non-invasive technique that has been widely used to augment slow oscillations during non-rapid eye movement sleep. Based on the principles of closed-loop stimulation, we developed a novel protocol for manipulating theta activity (3-7 Hz) in rapid eye movement (REM) sleep. Sixteen healthy young adults were studied in two overnight conditions: Stimulation and Sham. In the Stimulation condition, 1 s of 5 Hz amplitude-modulated white noise was delivered upon detection of two supra-threshold theta cycles throughout REM sleep...
November 7, 2020: Sleep
#18
JOURNAL ARTICLE
Jules Schneider, Penelope A Lewis, Dominik Koester, Jan Born, Hong-Viet V Ngo
STUDY OBJECTIVES: Cortical slow oscillations (SOs) and thalamocortical sleep spindles hallmark slow wave sleep and facilitate memory consolidation, both of which are reduced with age. Experiments utilizing auditory closed-loop stimulation to enhance these oscillations showed great potential in young and older subjects. However, the magnitude of responses has yet to be compared between these age groups. We examined the possibility of enhancing SOs and performance on different memory tasks in a healthy middle-aged population using this stimulation and contrast effects to younger adults...
June 2, 2020: Sleep
#19
JOURNAL ARTICLE
Jennifer E Ashton, Marcus O Harrington, Diane Langthorne, Hong-Viet V Ngo, Scott A Cairney
Sleep deprivation increases rates of forgetting in episodic memory. Yet, whether an extended lack of sleep alters the qualitative nature of forgetting is unknown. We compared forgetting of episodic memories across intervals of overnight sleep, daytime wakefulness, and overnight sleep deprivation. Item-level forgetting was amplified across daytime wakefulness and overnight sleep deprivation, as compared to sleep. Importantly, however, overnight sleep deprivation led to a further deficit in associative memory that was not observed after daytime wakefulness...
April 2020: Learning & Memory
#20
JOURNAL ARTICLE
Alexander Prehn-Kristensen, Hong-Viet V Ngo, Luisa Lentfer, Julia Berghäuser, Lena Brandes, Larissa Schulze, Robert Göder, Matthias Mölle, Lioba Baving
STUDY OBJECTIVES: Slow oscillations (SO) during slow-wave sleep foster the consolidation of declarative memory. Children with ADHD display deficits in the sleep-associated consolidation of declarative memory, possibly due to an altered function of SO. The present study aimed at enhancing SO activity using closed-looped acoustic stimulation during slow wave sleep in children with ADHD. METHODS: Twenty nine male children (14 with ADHD; aged 8-12 yrs.) participated in a double-blind, placebo-controlled study trial...
February 8, 2020: Sleep
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