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Nguyen U, Strik M, Abu-Arib S, Bruekers A, Nguyen T, Massud A, Willems R, Dekker S, Spaetgens B, Engels E, Crijns HGJM, Koopmans R, Henry R, Stehouwer CDA. Electrocardiographic characteristics of patients with coronavirus disease 2019 (COVID-2019) related pneumonia at first presentation. Europace 2021. [PMCID: PMC8194544 DOI: 10.1093/europace/euab116.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Funding Acknowledgements Type of funding sources: None. Purpose To evaluate electrocardiographic (ECG) characteristics at first presentation in patients with possible coronavirus disease (COVID-19) pneumonia. Methods and results 356 patients presenting at the emergency room with possible COVID-19 pneumonia based on clinical presentation and computed tomography findings were included and subdivided into a COVID-19 positive group ([COVID-19-positive], n = 231, 65%) and a COVID-19 negative group ([COVID-19-negative], n = 125, 35%) based on polymerase chain reaction tests. The study population was predominantly middle aged-elderly (67 ± 14 year; n = 235, 66% male). Mortality rate was 24% after 1-month follow-up. There were no significant (NS) differences in sex, age, and mortality between the COVID-19-positive and COVID-19-negative group. Atrial fibrillation (AF) was common (9%), though its prevalence was NS (regression analyses adjusted for age and sex) different in the COVID-19-positive vs. the COVID-19-negative group. ECG characteristics reflecting atrial enlargement and repolarization abnormalities were frequently present (<38% and 14% respectively). No significant differences were found between the COVID-19-positive vs. the COVID-19-negative group for the majority of morphological ECG characteristics (Figure 1 for more detailed data). Conclusion AF and ECG characteristics reflecting atrial enlargement and repolarization abnormalities are commonly present in COVID-19 patients. The prevalence of these ECG characteristics however do NS differ from their COVID-19-negative counterparts.
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Ahn C, Yang YA, Neupane DP, Nguyen T, Richards AF, Sim JH, Mantis NJ, Song J. Mechanisms of typhoid toxin neutralization by antibodies targeting glycan receptor binding and nuclease subunits. iScience 2021; 24:102454. [PMID: 34113815 PMCID: PMC8169802 DOI: 10.1016/j.isci.2021.102454] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 03/09/2021] [Accepted: 04/19/2021] [Indexed: 12/18/2022] Open
Abstract
Nearly all clinical isolates of Salmonella Typhi, the cause of typhoid fever, are antibiotic resistant. All S. Typhi isolates secrete an A2B5 exotoxin called typhoid toxin to benefit the pathogen during infection. Here, we demonstrate that antibiotic-resistant S. Typhi secretes typhoid toxin continuously during infection regardless of antibiotic treatment. We characterize typhoid toxin antibodies targeting glycan-receptor-binding PltB or nuclease CdtB, which neutralize typhoid toxin in vitro and in vivo, as demonstrated by using typhoid toxin secreted by antibiotic-resistant S. Typhi during human cell infection and lethal dose typhoid toxin challenge to mice. TyTx11 generated in this study neutralizes typhoid toxin effectively, comparable to TyTx4 that binds to all PltB subunits available per holotoxin. Cryoelectron microscopy explains that the binding of TyTx11 to CdtB makes this subunit inactive through CdtB catalytic-site conformational change. The identified toxin-neutralizing epitopes are conserved across all S. Typhi clinical isolates, offering critical insights into typhoid toxin-neutralizing strategies.
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Meaidi A, Heimustovu BH, Nguyen H, Nguyen T. Declining risk of surgical intervention following early medical abortion: A time trend analysis. Contraception 2021; 104:492-495. [PMID: 33979650 DOI: 10.1016/j.contraception.2021.04.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 04/24/2021] [Accepted: 04/27/2021] [Indexed: 12/01/2022]
Abstract
OBJECTIVE To evaluate the time trend in risk of surgical intervention following early medical abortion. STUDY DESIGN We conducted a retrospective observational study including all medical abortions induced before a gestational age of 63 days during the period 2008-2012 in a Danish gynecology clinic with a single provider deciding the necessity of subsequent surgical intervention. All included abortions were followed for 8 weeks from first medical administration. We extracted information on surgical intervention during follow-up and potential confounding variables from local and national health registers and assessed these according to calendar time. Multiple logistic regression provided an adjusted odds ratio of the association between calendar time and risk of surgical intervention. RESULTS A total of 1372 abortions were induced on site during the study period. Surgical interventions on site decreased from 10.2% in 2008 to 2.6% in 2012 (p < 0.001). The decline was significant after adjustment of gestational age, maternal age, and reproductive history, odds ratio for 1-year increase 0.71 (95% CI: 0.59-0.86). CONCLUSION Risk of surgical intervention following early medical abortion declined by time independent of known risk factors for surgical intervention in a setting with a single provider deciding the necessity of surgical intervention.
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Gowda N, Gutti S, Iyer D, Nguyen T, Sharma K, Scher D. Abstract No. 505 Validating the registration accuracy of a multimodal registration device to enhance computed tomography–guided percutaneous biopsy and ablation procedures. J Vasc Interv Radiol 2021. [DOI: 10.1016/j.jvir.2021.03.314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Nguyen T, Lestienne F, Cousy A, Mengeaud V, Castex-Rizzi N. Effective inhibition of Th17/Th22 pathway in 2D and 3D human models of psoriasis by Celastrol enriched plant cell culture extract. J Eur Acad Dermatol Venereol 2021; 34 Suppl 6:3-9. [PMID: 32783265 DOI: 10.1111/jdv.16475] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 04/03/2020] [Indexed: 01/13/2023]
Abstract
BACKGROUND Psoriasis is an immune-mediated inflammatory disease in which the Th17 pathway is mainly involved. Systemic interventions with biologics that specifically block the Th17 pathway are effective to treat severe psoriasis. However, for efficient topical treatment, small molecules are more suitable than antibodies to penetrate and target epidermal keratinocytes, the key players in psoriasis. Celastrol, a well-described triterpene, is present in low amounts in Tripterygium wilfordii roots. By using plant cell culture (PCC), we were able to boost Celastrol production in bioreactors. Here, we evaluated immune modulator effect of Celastrol enriched extract (CEE) in Th17/Th22 psoriasis induced in 2D and 3D human models in vitro in view of its dermatological usage. METHODS Human CD4+ T cells (hCD4), Normal Human Epidermal Keratinocytes (NHEK), micro-epidermis and reconstructed human epidermis (RHE) were preincubated with CEE and reference controls. Then, hCD4 were stimulated by anti-[CD3/CD28] while others were stimulated by Th17/22 cytokines cocktails. Psoriasis biomarkers were assessed by ELISA (hCD4 and RHE), by RT-qPCR (NHEK) or by ICH/ELISA (micro-epidermis). RESULTS In 2D stimulated models (hCD4 and NHEK), CEE dose dependently inhibited, respectively, the expression of Th17 cytokines and psoriasis induced biomarkers. In 3D models (RHE and micro-epidermis), IL-8 expression was significantly reduced (RHE) and native phenotype was restored by CEE (micro-epidermis). CONCLUSION These results clearly showed that Th17/Th22 cytokines, main inflammatory parameters, and psoriasis associated key biomarkers were inhibited by CEE in both 2D and 3D human in vitro models. Therefore, skin homeostasis could be restored by these modulator effects. Moreover, this high added value CEE was obtained by an ecofriendly bioprocess in contrast to traditional roots extracts. This is the first time that a well-defined CEE immune modulator has been proposed for psoriasis adjuvant care to reduce inflammation.
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VerMilyea M, Hall JMM, Diakiw SM, Johnston A, Nguyen T, Perugini D, Miller A, Picou A, Murphy AP, Perugini M. Development of an artificial intelligence-based assessment model for prediction of embryo viability using static images captured by optical light microscopy during IVF. Hum Reprod 2021; 35:770-784. [PMID: 32240301 PMCID: PMC7192535 DOI: 10.1093/humrep/deaa013] [Citation(s) in RCA: 125] [Impact Index Per Article: 41.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Revised: 12/23/2019] [Accepted: 01/16/2020] [Indexed: 11/17/2022] Open
Abstract
STUDY QUESTION Can an artificial intelligence (AI)-based model predict human embryo viability using images captured by optical light microscopy? SUMMARY ANSWER We have combined computer vision image processing methods and deep learning techniques to create the non-invasive Life Whisperer AI model for robust prediction of embryo viability, as measured by clinical pregnancy outcome, using single static images of Day 5 blastocysts obtained from standard optical light microscope systems. WHAT IS KNOWN ALREADY Embryo selection following IVF is a critical factor in determining the success of ensuing pregnancy. Traditional morphokinetic grading by trained embryologists can be subjective and variable, and other complementary techniques, such as time-lapse imaging, require costly equipment and have not reliably demonstrated predictive ability for the endpoint of clinical pregnancy. AI methods are being investigated as a promising means for improving embryo selection and predicting implantation and pregnancy outcomes. STUDY DESIGN, SIZE, DURATION These studies involved analysis of retrospectively collected data including standard optical light microscope images and clinical outcomes of 8886 embryos from 11 different IVF clinics, across three different countries, between 2011 and 2018. PARTICIPANTS/MATERIALS, SETTING, METHODS The AI-based model was trained using static two-dimensional optical light microscope images with known clinical pregnancy outcome as measured by fetal heartbeat to provide a confidence score for prediction of pregnancy. Predictive accuracy was determined by evaluating sensitivity, specificity and overall weighted accuracy, and was visualized using histograms of the distributions of predictions. Comparison to embryologists’ predictive accuracy was performed using a binary classification approach and a 5-band ranking comparison. MAIN RESULTS AND THE ROLE OF CHANCE The Life Whisperer AI model showed a sensitivity of 70.1% for viable embryos while maintaining a specificity of 60.5% for non-viable embryos across three independent blind test sets from different clinics. The weighted overall accuracy in each blind test set was >63%, with a combined accuracy of 64.3% across both viable and non-viable embryos, demonstrating model robustness and generalizability beyond the result expected from chance. Distributions of predictions showed clear separation of correctly and incorrectly classified embryos. Binary comparison of viable/non-viable embryo classification demonstrated an improvement of 24.7% over embryologists’ accuracy (P = 0.047, n = 2, Student’s t test), and 5-band ranking comparison demonstrated an improvement of 42.0% over embryologists (P = 0.028, n = 2, Student’s t test). LIMITATIONS, REASONS FOR CAUTION The AI model developed here is limited to analysis of Day 5 embryos; therefore, further evaluation or modification of the model is needed to incorporate information from different time points. The endpoint described is clinical pregnancy as measured by fetal heartbeat, and this does not indicate the probability of live birth. The current investigation was performed with retrospectively collected data, and hence it will be of importance to collect data prospectively to assess real-world use of the AI model. WIDER IMPLICATIONS OF THE FINDINGS These studies demonstrated an improved predictive ability for evaluation of embryo viability when compared with embryologists’ traditional morphokinetic grading methods. The superior accuracy of the Life Whisperer AI model could lead to improved pregnancy success rates in IVF when used in a clinical setting. It could also potentially assist in standardization of embryo selection methods across multiple clinical environments, while eliminating the need for complex time-lapse imaging equipment. Finally, the cloud-based software application used to apply the Life Whisperer AI model in clinical practice makes it broadly applicable and globally scalable to IVF clinics worldwide. STUDY FUNDING/COMPETING INTEREST(S) Life Whisperer Diagnostics, Pty Ltd is a wholly owned subsidiary of the parent company, Presagen Pty Ltd. Funding for the study was provided by Presagen with grant funding received from the South Australian Government: Research, Commercialisation and Startup Fund (RCSF). ‘In kind’ support and embryology expertise to guide algorithm development were provided by Ovation Fertility. J.M.M.H., D.P. and M.P. are co-owners of Life Whisperer and Presagen. Presagen has filed a provisional patent for the technology described in this manuscript (52985P pending). A.P.M. owns stock in Life Whisperer, and S.M.D., A.J., T.N. and A.P.M. are employees of Life Whisperer.
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Vanstapel A, Goldschmeding R, Broekhuizen R, Nguyen T, Sacreas A, Kaes J, Heigl T, Verleden S, Verleden G, Weynand B, Verbeken E, Ceulemans L, Van Raemdonck D, Neyrinck A, Schoemans H, Vanaudenaerde B, Vos R. Connective Tissue Growth Factor in Chronic Lung Allograft Dysfunction: An Explorative Study. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Singh H, Nguyen T, Pho C, Giles E. Early Infliximab in Crohn's is associated with decreased intestinal surgery and similar health care costs. Scand J Gastroenterol 2021; 56:397-402. [PMID: 33595389 DOI: 10.1080/00365521.2021.1880626] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Using Infliximab early in Crohn's disease can provide a window of opportunity in children for restoration of growth and achievement of puberty. We aimed to compare clinical outcomes and costs of a retrospective pediatric Crohn's disease (pCD) cohort treated with early use Infliximab (EUI) within 12 months compared with later use Infliximab (LUI). METHODS Retrospective review of all children with pCD commenced on Infliximab was undertaken in a tertiary Australian pediatric center. RESULTS pCD progressing to Infliximab was identified in 70 children: 38 (54%) in the EUI cohort versus 32 (46%) in the LUI cohort. Intestinal surgery had a higher risk of occurring in EUI when compared with LUI (2 (5%) versus 9 (28%), HR 5.67 (95% CI 1.21-26.38); p = .027). No patients in EUI underwent intestinal surgery post Infliximab commencement compared with 3 (9%) in LUI (p = .09). Escalation of Infliximab in luminal Crohn's disease was not significantly different in EUI when compared with LUI (3 (10.3%) versus 9 (39.1%) (p = .1)). EUI was more frequently used than LUI in 2015-2018 (27 (71%) versus 14 (44%)) p = .029, with the inverse occurring in 2010-2014 (11 (29%) versus 18 (56%)). Hospital admissions per person per year in EUI and LUI were 43 (0.23 visits/person/year) versus 84 (0.67 visits/person/year); IRR 2.51 (95% CI 0.9-7.01); p = .078). Health costs were not significantly different between cohorts. CONCLUSION EUI in pCD is associated with an increased likelihood of being diagnosed in more recent years, less intestinal surgery and a trend toward decreased hospital admissions than LUI.
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Akhtar H, Nguyen T, Jairath V. A200 VEDOLIZUMAB IS AN EFFECTIVE TREATMENT OPTION FOR NON INFLAMMATORY BOWEL DISEASE RELATED ENTEROPATHY. J Can Assoc Gastroenterol 2021. [DOI: 10.1093/jcag/gwab002.198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Vedolizumab is an α4β7 integrin antagonist which inhibits intestinal T-cell translocation by blocking integrin interactions with mucosal vascular addressin cell adhesion molecule 1, reducing lymphocyte mediated inflammation. Its gut selective mode of action and safety profile have lead to reports of off-label use of vedolizumab for non-IBD related inflammatory intestinal disorders.
Aims
We conducted a literature review to assess clinical, endoscopic and histologic improvement in patients treated with Vedolizumab for non-IBD enteropathies refractory to conventional therapy.
Methods
EMBASE, Medline, Clinicaltrials.gov and Cochrane CENTRAL were searched on September 12, 2019 for case studies, case series and cohort studies without language restriction yielding 356 studies with 164 duplicates, 74 non-applicable studies, leaving 118 studies. After full text review, 98 studies were excluded, leaving 20 included studies.
Results
65% of patients (51/79) achieved clinical response. 40.5% (15/37) of patients experienced endoscopic improvement and 33% (17/51) of patients experienced histologic improvement. The duration of treatment varied from patients receiving only induction doses to up to 70 months for maintenance therapy. There were four reported cases of withdrawal due to adverse events from Vedolizumab.
Conclusions
In a treatment refractory population, over 60% of patients reported to have a clinical response and one-third endoscopic/histologic response, indicating that Vedolizumab is a viable option for patients with refractory non-IBD enteropathy.
Funding Agencies
None
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Kugananthan S, Nguyen T, Patel J, Anthonappa R. Knowledge, experiences and attitudes of dental health professionals towards reporting child abuse in Western Australia. Aust Dent J 2021; 66:194-200. [PMID: 33450084 DOI: 10.1111/adj.12823] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/06/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Up to 50% of child abuse (CA) victims exhibit evidence of traumatic facial or intraoral injuries. Dental health professionals (DHPs) are therefore well-positioned to detect and report incidences of CA. This study aimed to assess the knowledge and attitudes of Western Australian DHPs towards identifying and reporting CA. METHODS General dentists, specialists, hygienists and oral health therapists completed an online questionnaire which assessed their knowledge and experience in identifying and reporting CA. RESULTS A total of 228 participants completed the questionnaire (representing 7% of DHPs, 60% of paediatric dentists and 11% of all dental hygienists and therapists in Western Australia). The majority of participants (66.2%, P < 0.05) felt that they were unlikely to recognize a patient with physical abuse, or detect signs of sexual abuse (90.8%, P < 0.001). Uncertainty around diagnosing abuse was a barrier towards reporting cases (86.4%, P < 0.05) and most participants (78.0%, P < 0.05) felt that they did not have adequate safeguarding training to report CA. CONCLUSIONS Self-reported confidence in identifying and reporting CA cases was low; with the majority of the dental professionals participating in this study unlikely to recognize signs of CA. Inadequate training and knowledge around correct reporting protocols were identified as barriers, which warrants an appropriate change to improve child safeguarding.
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McClure MJ, Olson LC, Cohen DJ, Huang YC, Zhang S, Nguyen T, Boyan BD, Schwartz Z. RNU ( Foxn1
RNU-Nude) Rats Demonstrate an Improved Ability to Regenerate Muscle in a Volumetric Muscle Injury Compared to Sprague Dawley Rats. Bioengineering (Basel) 2021; 8:bioengineering8010012. [PMID: 33467489 PMCID: PMC7830033 DOI: 10.3390/bioengineering8010012] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 01/07/2021] [Accepted: 01/12/2021] [Indexed: 01/13/2023] Open
Abstract
Products developed for skeletal muscle regeneration frequently incorporate allogeneic and xenogeneic materials to elicit a regenerative response to heal skeletal muscle wounds. To avoid graft rejection in preclinical studies, immunodeficient rodents are used. Whether the immunodeficiency alters the host response to the material in skeletal muscle has not been studied. In this study, we hypothesized that an allogeneic acellular skeletal muscle grafts implanted in an immunodeficient rat (RNU, Foxn1-deficient) would exhibit better new muscle fiber formation compared to grafts implanted in immunocompetent Sprague Dawley (SD) rats. Decellularized SD skeletal muscle matrix (DMM) was implanted in the gastrocnemius (N = 8 rats/group). 56 days after surgery, animal gait was examined and animals were euthanized. Muscle force was assessed and fiber number as well as immune cell infiltrate was measured by histomorphometry and immunohistochemistry. Animal gait and percent recovery of muscle force were unchanged in both groups, but newly regenerated muscle fibers increased in RNU rats. Macrophage staining for CD68 was higher in RNU rats than in SD rats. These data show differences in muscle regeneration between animal models using the same biomaterial treatment, but these differences could not be ascribed to the immune response. Overall, our data provide awareness that more studies are needed to understand how host responses to biomaterials differ based on the animal model used.
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Nguyen T, Pham H. A Maximal Theorem of Hardy--Littlewood Type for Pairwise I.I.D. Random Variables and the Law of Large Numbers. THEORY OF PROBABILITY AND ITS APPLICATIONS 2021. [DOI: 10.1137/s0040585x97t990502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Dao H, Burns M, Chow C, Nguyen T. Meta-analysis on Metabolic Syndrome and Frailty in Older People. Heart Lung Circ 2021. [DOI: 10.1016/j.hlc.2021.06.413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Cho K, Shugman I, Veale K, Femia G, Nguyen T, Premawardhana U. The Role of Tilt-Table Testing in the Diagnostic Evaluation of Syncope–A Single Centre Experience. Heart Lung Circ 2021. [DOI: 10.1016/j.hlc.2021.06.172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Castagnola E, Thongpang S, Hirabayashi M, Nava G, Nimbalkar S, Nguyen T, Lara S, Oyawale A, Bunnell J, Moritz C, Kassegne S. Glassy carbon microelectrode arrays enable voltage-peak separated simultaneous detection of dopamine and serotonin using fast scan cyclic voltammetry. Analyst 2021; 146:3955-3970. [DOI: 10.1039/d1an00425e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Glassy carbon (GC) microelectrode arrays can simultaneously discriminate the reduction and oxidation peaks of dopamine and serotonin at low concentrations (10–200 nM). They demonstrated fast electron transfer kinetics and good fouling properties.
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Cho K, Hopkins A, Shugman I, Akrawi D, Nguyen T, Nguyen P, Premawardhana U. Supraventricular and Atrial Tachycardia Radiofrequency Catheter Ablation Without On-Site Surgical Backup – Single Centre Experience. Heart Lung Circ 2021. [DOI: 10.1016/j.hlc.2021.06.170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Sharma L, Faour A, Nguyen T, Burgess S, Juergens C, French J. Simple Indices of Infarct Size Post ST-Elevation Myocardial Infarction (STEMI) Provides Similar Risk Stratification to Cardiac MRI. Heart Lung Circ 2021. [DOI: 10.1016/j.hlc.2021.06.330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Cuoco E, Powell J, Cavaglià M, Ackley K, Bejger M, Chatterjee C, Coughlin M, Coughlin S, Easter P, Essick R, Gabbard H, Gebhard T, Ghosh S, Haegel L, Iess A, Keitel D, Márka Z, Márka S, Morawski F, Nguyen T, Ormiston R, Pürrer M, Razzano M, Staats K, Vajente G, Williams D. Enhancing gravitational-wave science with machine learning. MACHINE LEARNING: SCIENCE AND TECHNOLOGY 2020. [DOI: 10.1088/2632-2153/abb93a] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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Nguyen T, Dermauw V, Dahma H, Bui-Thi D, Le T, Phi N, Lempereur L, Losson B, Vandenberg O, Do D, Dorny P. Clonorchis sinensis in rural communities in northern Vietnam and associated risk factors. Int J Infect Dis 2020. [DOI: 10.1016/j.ijid.2020.09.1125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Congiu E, Sow A, Nguyen T, Baouche S, Dulieu F. A new multi-beam apparatus for the study of surface chemistry routes to formation of complex organic molecules in space. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2020; 91:124504. [PMID: 33379980 DOI: 10.1063/5.0018926] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 11/07/2020] [Indexed: 06/12/2023]
Abstract
A multi-beam ultra-high vacuum apparatus is presented. In this article, we describe the design and construction of a new laboratory astrophysics experiment-VErs de NoUvelles Synthèses (VENUS)-that recreates the solid-state non-energetic formation conditions of complex organic molecules in dark clouds and circumstellar environments. The novel implementation of four operational differentially pumped beam lines will be used to determine the feasibility and the rates for the various reactions that contribute to formation of molecules containing more than six atoms. Data are collected by means of Fourier transform infrared spectroscopy and quadrupole mass spectrometry. The gold-coated sample holder reaches temperatures between 7 K and 400 K. The apparatus was carefully calibrated and the acquisition system was developed to ensure that experimental parameters are recorded as accurately as possible. A great effort has been made to have the beam lines converge toward the sample. Experiments have been developed to check the beam alignment using reacting systems of neutral species (NH3 and H2CO). Preliminary original results were obtained for the {NO + H} system, which shows that chemistry occurs only in the very first outer layer of the deposited species, that is, the chemical layer and the physical layer coincide. This article illustrates the characteristics, performance, and future potential of the new apparatus in view of the forthcoming launch of the James Webb Space Telescope. We show that VENUS will have a major impact through its contributions to surface science and astrochemistry.
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Gibbings A, Ray LB, Berberian N, Nguyen T, Shahidi Zandi A, Owen AM, Comeau FJE, Fogel SM. EEG and behavioural correlates of mild sleep deprivation and vigilance. Clin Neurophysiol 2020; 132:45-55. [PMID: 33248433 DOI: 10.1016/j.clinph.2020.10.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 09/15/2020] [Accepted: 10/16/2020] [Indexed: 10/23/2022]
Abstract
OBJECTIVE The current study investigated the behavioral, cognitive, and electrophysiological impact of mild (only a few hours) and acute (one night) sleep loss via simultaneously recorded behavioural and physiological measures of vigilance. METHODS Participants (N = 23) came into the lab for two testing days where their brain activity and vigilance were recorded and assessed. The night before the testing session, participants either slept from 12am to 9am (Normally Rested), or from 1am to 6am (Sleep Restriction). RESULTS Vigilance was reduced and sleepiness was increased in the Sleep Restricted vs. Normally Rested condition, and this was exacerbated over the course of performing the vigilance task. As well, sleep restriction resulted in more intense alpha bursts. Lastly, EEG spectral power differed in Sleep Restricted vs. Normally Rested conditions as sleep onset progressed, particularly for frequencies reflecting arousal (e.g., delta, alpha, beta). CONCLUSIONS The findings of this study suggest that only one night of mild sleep loss significantly increases sleepiness and, importantly, reduces vigilance. In addition, this sleep loss has a clear impact on the physiology of the brain in ways that reflect reduced arousal. SIGNIFICANCE Understanding the neural correlates and cognitive processes associated with loss of sleep may lead to important advancements in identifying and preventing deleterious or potentially dangerous, sleep-related lapses in vigilance.
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Law KH, Dimmock JA, Guelfi KJ, Nguyen T, Bennett E, Gibson L, Tan XH, Jackson B. A peer support intervention for first-time mothers: Feasibility and preliminary efficacy of the mummy buddy program. Women Birth 2020; 34:593-605. [PMID: 33160896 DOI: 10.1016/j.wombi.2020.10.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Revised: 09/15/2020] [Accepted: 10/18/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND The transition to motherhood, although joyous, can be highly stressful, and the availability of professional postpartum support for mothers is often limited. Peer volunteer support programs may offer a viable and cost-effective method to provide community-based support for new mothers. AIM To determine the feasibility of a peer volunteer support program-The Mummy Buddy Program-in which experienced volunteer mothers are paired with, and trained to offer social support to, first-time mothers. METHODS Using a single-group non-randomised feasibility trial, a total of 56 experienced mothers participated in the Mummy Buddy training program, which was focused on education and practical exercises relating to the provision of various forms of social support. Experienced mothers ('Mummy Buddies') were subsequently paired with expectant first-time mothers (n=47 pairs), and were encouraged to provide support until 24-weeks postpartum. FINDINGS In terms of key feasibility considerations, 95.1% of Mummy Buddies felt that they were trained sufficiently to perform their role, and 85.8% of New Mothers were satisfied with the support provided by their Buddy. Analyses of preliminary efficacy (i.e., program outcomes) revealed that the first-time mothers maintained normal levels of stress and depressive symptomology, and possessed relatively strong maternal functioning, across the program duration. CONCLUSION The Mummy Buddy Program appears to be a feasible and potentially valuable peer volunteer support program for first-time mothers. This study provides a foundation for program expansion and for work designed to examine program outcomes-for first-time mothers, Mummy Buddies, and entire family units-within a sufficiently-powered randomised controlled trial.
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Zayed S, Nguyen T, Beriwal S, Creutzberg C, Kamrava M, Leung E, D'Souza D. Red Blood Cell Transfusion Practices for Cervix Cancer Patients Undergoing Radiotherapy: An International Delphi Consensus Study. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.2590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Corkum M, Fakir H, Palma D, Nguyen T, Bauman G. Can Polymetastatic Disease Be Arrested Using SABR? A Dosimetric Analysis to Inform Development of a Phase I Trial. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Nguyen PA, Nguyen AVP, Dang-Bao T, Phan HP, Nguyen TTV, Tran BA, Huynh TLD, Hoang TC, Huynh VT, Nguyen T. Green synthesis of copper nanoparticles using Cocoa pod extract and its catalytic activity in deep oxidation of aromatic hydrocarbons. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-03539-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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