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Nguyen H, Narayanan D, Limmer A, Simonette R, Rady P, Tyring S. 847 Modulation of the p38-MAPK/MSK/Histone H3 axis by select cutaneous polyomavirus small T antigens. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Axt JR, Nguyen H, Nosek BA. The Judgment Bias Task: A flexible method for assessing individual differences in social judgment biases. JOURNAL OF EXPERIMENTAL SOCIAL PSYCHOLOGY 2018. [DOI: 10.1016/j.jesp.2018.02.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Marcovecchio ML, Tossavainen PH, Owen K, Fullah C, Benitez-Aguirre P, Masi S, Ong K, Nguyen H, Chiesa ST, Dalton RN, Deanfield J, Dunger DB. Clustering of cardio-metabolic risk factors in parents of adolescents with type 1 diabetes and microalbuminuria. Pediatr Diabetes 2017; 18:947-954. [PMID: 28271589 PMCID: PMC6186416 DOI: 10.1111/pedi.12515] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 01/12/2017] [Accepted: 02/06/2017] [Indexed: 02/02/2023] Open
Abstract
OBJECTIVE To evaluate the association between a clustering of cardio-metabolic risk factors in parents and the development of microalbuminuria (MA) in their offspring with childhood-onset type 1 diabetes (T1D). METHODS The study population comprised 53 parents (mean age [±SD]: 56.7±6.2 years) of 35 T1D young people with MA (MA+) and 86 parents (age: 56.1±6.3 years) of 50 matched offspring with normoalbuminuria (MA-), who underwent clinical, biochemical and cardiovascular imaging assessments. The primary study endpoint was the difference between parents from the MA+ and MA- groups in a cardio-metabolic risk score, calculated as the average value of the standardized measures (z-scores) for waist circumference, blood pressure, fasting glucose, insulin, HDL-cholesterol and triglycerides levels. Cardiovascular parameters, including carotid intima-media thickness (cIMT), flow-mediated dilatation (FMD) and pulse wave velocity (PWV), were also assessed. A DXA scan was performed to assess body composition. RESULTS The cardio-metabolic risk score was significantly higher in parents of MA+ compared to parents of MA- offspring (mean [95% CI]: 1.066[0.076; 2.056] vs -0.268[-0.997; 0.460], P = .03). Parents of MA+ offspring had slightly higher values of waist circumference, lipids, insulin and blood pressure, although only diastolic blood pressure was statistically different between the 2 groups (P = .0085). FMD, cIMT, PWV (all P > .3), and DXA parameters (all P > .2) were not significantly different between the 2 groups. CONCLUSIONS Parents of young offspring with childhood-onset T1D and MA showed an abnormal metabolic profile, reflected by a calculated risk score. The finding supports the role of a familial predisposition to risk of developing diabetic nephropathy.
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Boreta L, Xu M, Wu S, Wu A, Nguyen H, Chang A, Roach M, Spratt D, Feng F, Carroll P, Hope T. Location of Recurrence by Gallium-68 PSMA PET Scan in Prostate Cancer Patients Eligible for Salvage Radiation Therapy. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Mathur R, de Korne D, Wong T, Chiang P, Wong E, Goh D, Chakraborty B, Nguyen H, Wai C, Tan D, Lamoureux E. Towards a shared care model for stable diabetic retinopathy patients: a feasibility trial in Singapore. Acta Ophthalmol 2017. [DOI: 10.1111/j.1755-3768.2017.02314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Joshi MD, O'Donnell JN, Venkatesan N, Chang J, Nguyen H, Rhodes NJ, Pais G, Chapman RL, Griffin B, Scheetz MH. High-Performance Liquid Chromatography Method for Rich Pharmacokinetic Sampling Schemes in Translational Rat Toxicity Models With Vancomycin. Clin Transl Sci 2017; 10:496-502. [PMID: 28675684 PMCID: PMC5698807 DOI: 10.1111/cts.12484] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 05/29/2017] [Indexed: 12/31/2022] Open
Abstract
A translational need exists to understand and predict vancomycin‐induced kidney toxicity. We describe: (i) a vancomycin high‐performance liquid chromatography (HPLC) method for rat plasma and kidney tissue homogenate; (ii) a rat pharmacokinetic (PK) study to demonstrate utility; and (iii) a catheter retention study to enable future preclinical studies. Rat plasma and pup kidney tissue homogenate were analyzed via HPLC for vancomycin concentrations ranging from 3–75 and 15.1–75.5 μg/mL, respectively, using a Kinetex Biphenyl column and gradient elution of water with 0.1% formic acid: acetonitrile (70:30 v/v). Sprague‐Dawley rats (n = 10) receiving 150 mg/kg of vancomycin intraperitoneally had plasma sampled for PK. Finally, a catheter retention study was performed on polyurethane catheters to assess adsorption. Precision was <6.1% for all intra‐assay and interassay HPLC measurements, with >96.3% analyte recovery. A two‐compartment model fit the data well, facilitating PK exposure estimates. Finally, vancomycin was heterogeneously retained by polyurethane catheters.
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Rineau F, Lmalem H, Ahren D, Shah F, Johansson T, Coninx L, Ruytinx J, Nguyen H, Grigoriev I, Kuo A, Kohler A, Morin E, Vangronsveld J, Martin F, Colpaert JV. Comparative genomics and expression levels of hydrophobins from eight mycorrhizal genomes. MYCORRHIZA 2017; 27:383-396. [PMID: 28066872 DOI: 10.1007/s00572-016-0758-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 12/22/2016] [Indexed: 06/06/2023]
Abstract
Hydrophobins are small secreted proteins that are present as several gene copies in most fungal genomes. Their properties are now well understood: they are amphiphilic and assemble at hydrophilic/hydrophobic interfaces. However, their physiological functions remain largely unexplored, especially within mycorrhizal fungi. In this study, we identified hydrophobin genes and analysed their distribution in eight mycorrhizal genomes. We then measured their expression levels in three different biological conditions (mycorrhizal tissue vs. free-living mycelium, organic vs. mineral growth medium and aerial vs. submerged growth). Results confirmed that the size of the hydrophobin repertoire increased in the terminal orders of the fungal evolutionary tree. Reconciliation analysis predicted that in 41% of the cases, hydrophobins evolved from duplication events. Whatever the treatment and the fungal species, the pattern of expression of hydrophobins followed a reciprocal function, with one gene much more expressed than others from the same repertoire. These most-expressed hydrophobin genes were also among the most expressed of the whole genome, which suggests that they play a role as structural proteins. The fine-tuning of the expression of hydrophobin genes in each condition appeared complex because it differed considerably between species, in a way that could not be explained by simple ecological traits. Hydrophobin gene regulation in mycorrhizal tissue as compared with free-living mycelium, however, was significantly associated with a calculated high exposure of hydrophilic residues.
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Djonlagic I, Weng J, Johnson D, Marani S, Purcell S, Fitzpatrick A, Frazier-Wood A, Seeman T, Nguyen H, Luchsinger J, Rapp S, Redline S. 0754 ASSOCIATIONS BETWEEN SLEEP EFFICIENCY AND COGNITIVE FUNCTION IN THE MULTI-ETHNIC STUDY OF ATHEROSCLEROSIS (MESA). Sleep 2017. [DOI: 10.1093/sleepj/zsx050.753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Ma C, Nguyen H, Paradiso L, Putz U, Luwor R, Kaye A, Morokoff A. P08.35 Exosomes derived from Glioma Stem Cells (GSCs) promote cell migration, proliferation and radiation resistance in brain cancer. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox036.224] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Jiu Z, Wismer WV, Juárez M, Nguyen H, Fitzsimmons C, Li C, Bruce HL. Effect of Residual Feed Intake Status, Breed and Post Mortem Aging on Consumer Perception of and Preference for Beef Ribeye Steaks. MEAT AND MUSCLE BIOLOGY 2017. [DOI: 10.22175/rmc2017.111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Senay A, Delisle J, Giroux M, Laflamme GY, Leduc S, Malo M, Nguyen H, Ranger P, Fernandes JC. The impact of a standardized order set for the management of non-hip fragility fractures in a Fracture Liaison Service. Osteoporos Int 2016; 27:3439-3447. [PMID: 27368699 PMCID: PMC5118409 DOI: 10.1007/s00198-016-3669-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 06/13/2016] [Indexed: 01/05/2023]
Abstract
UNLABELLED We analysed the impact of a standardized order set empowering staff nurses to independently manage a Fracture Liaison Service over a 9-month period. Nurses identified between 30 and 70 % of non-hip fragility fractures to the unit in charge of management over time. The latter managed 58 % of referred patients. INTRODUCTION The main goal of this study was to evaluate the impact of a standardized order set empowering nurses to independently manage a fracture liaison service (FLS). METHODS Since November 2014, an order set allowed nurses of a Montreal hospital, Quebec, Canada to entirely manage an FLS on their own. Nurses followed an 6-h training program on-site. Emergency department (ED) and orthopaedic outpatient clinic (OC) nurses identified non-hip fragility fractures. Medical day treatment unit (MDTU) nurses were in charge of the management (investigation and treatment initiation). The list of patients, 50 years and older, with a fracture were retrieved for the period of November 2014 to July 2015. Performance was assessed with the rate of identification over time and the rate of management of non-hip fragility fractures. RESULTS Over the 9-month period, 346 patients of ≥50 years old were seen for a fracture, of which 190 met fragility criteria (excluding hip fractures). A sinusoid pattern of rates of identification between 30-70 % was observed over time. An average proportion of 58.1 % of fracture patients were managed by MDTU nurses. CONCLUSIONS A standardized order set legally allowing nurses to manage an FLS led to identification rates varying from 30-70 % and a management rate close to 60 % for referred patients over a 9-month period, which largely exceeds that of standard care. Identification was mostly compromised by difficulty integrating the order set into routine practice. Enforcement of the hospital policy on fragility fractures could help yield efficiency of identification of osteoporosis-related fractures by the staff.
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Assadi-Khansari B, Chua S, Chapman M, Ali O, Nguyen H, Horowitz J, Sverdlov A, Ngo D. Follistatin-like 3 Predicts Aortic Root Enlargement in Patients with Bicuspid Aortic Valve. Heart Lung Circ 2016. [DOI: 10.1016/j.hlc.2016.06.179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Nguyen H, Doan N, Shabani S, Gelsomino M, Zaidat O. E-017 Pure Tentorial Subdural Hematoma from Rupture of Aneurysm along the Transmastoid Branches of the Occipital Artery. J Neurointerv Surg 2016. [DOI: 10.1136/neurintsurg-2016-012589.89] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Costedoat-Chalumeau N, Houssiau F, Izmirly P, Le Guern V, Navarra S, Jolly M, Ruiz-Irastorza G, Hachulla E, Agmon-Levin N, Shoenfeld Y, Dall'Ara F, Buyon J, Deligny C, Cervera R, Lazaro E, Bezanahary H, Leroux G, Morel N, Viallard JF, Pineau C, Galicier L, Van Vollenhoven R, Tincani A, Nguyen H, Gondran G, Zahr N, Pouchot J, Piette JC, Petri M, Isenberg D. THU0304 Adherence To Hydroxychloroquine as Assessed by Measurements of Drug and Metabolite Blood Levels in An International Prospective Study of Sle Patients in Flare. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.3610] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Chaisson LH, Reber C, Phan H, Switz N, Nilsson LM, Myers F, Nhung NV, Luu L, Pham T, Vu C, Nguyen H, Nguyen A, Dinh T, Nahid P, Fletcher DA, Cattamanchi A. Evaluation of mobile digital light-emitting diode fluorescence microscopy in Hanoi, Viet Nam. Int J Tuberc Lung Dis 2016; 19:1068-72. [PMID: 26260826 DOI: 10.5588/ijtld.15.0018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
SETTING Hanoi Lung Hospital, Hanoi, Viet Nam. OBJECTIVE To compare the accuracy of CellScopeTB, a manually operated mobile digital fluorescence microscope, with conventional microscopy techniques. DESIGN Patients referred for sputum smear microscopy to the Hanoi Lung Hospital from May to September 2013 were included. Ziehl-Neelsen (ZN) smear microscopy, conventional light-emitting diode (LED) fluorescence microscopy (FM), CellScopeTB-based LED FM and Xpert(®) MTB/RIF were performed on sputum samples. The sensitivity and specificity of microscopy techniques were determined in reference to Xpert results, and differences were compared using McNemar's paired test of proportions. RESULTS Of 326 patients enrolled, 93 (28.5%) were Xpert-positive for TB. The sensitivity of ZN microscopy, conventional LED FM, and CellScopeTB-based LED FM was respectively 37.6% (95%CI 27.8-48.3), 41.9% (95%CI 31.8-52.6), and 35.5% (95%CI 25.8-46.1). The sensitivity of CellScopeTB was similar to that of conventional LED FM (difference -6.5%, 95%CI -18.2 to 5.3, P = 0.33) and ZN microscopy (difference -2.2%, 95%CI -9.2 to 4.9, P = 0.73). The specificity was >99% for all three techniques. DISCUSSION CellScopeTB performed similarly to conventional microscopy techniques in the hands of experienced TB microscopists. However, the sensitivity of all sputum microscopy techniques was low. Options enabled by digital microscopy, such as automated imaging with real-time computerized analysis, should be explored to increase sensitivity.
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Followill D, Kry S, Molineu A, Lowenstein J, Alvarez P, Taylor P, Nguyen H, Hernandez N, Nguyen T, Lujano C, Keith T. EP-1916: The IROC Houston QA Center’s international activities outside North America. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)33167-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Nguyen A, Nghiem N, Tran T, Hoang V, Le N, Phan Q, Le N, Ho V, Do V, Ha T, Nguyen H, Van Vinh CN, Thwaites G, van Doorn H, Le T. Development and evaluation of a vral-specific random PCR and next-generation sequencing based assay for detection and sequencing of hand, foot, and mouth disease pathogens. Int J Infect Dis 2016. [DOI: 10.1016/j.ijid.2016.02.435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Nguyen H, Silk M, Nakazawa M, Hunt S, Nadolski G, Soulen M, Simon M, Gade T. Targeting the metabolic stress response in hepatocellular carcinoma through inhibition of the unfolded protein response. J Vasc Interv Radiol 2016. [DOI: 10.1016/j.jvir.2015.12.073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Huynh KC, Nguyen H, Stoldt V, Scharf RE. Shear-induced fibrillar-like supramolecule of plasma fibronectin: A new form of fibronectin with enhanced activity in platelet adhesion and aggregation. ZEITSCHRIFT FUR GASTROENTEROLOGIE 2015. [DOI: 10.1055/s-0035-1567966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Neofytos D, Ostrander D, Shoham S, Laverdiere M, Hiemenz J, Nguyen H, Clarke W, Brass L, Lu N, Marr KA. Voriconazole therapeutic drug monitoring: results of a prematurely discontinued randomized multicenter trial. Transpl Infect Dis 2015; 17:831-7. [PMID: 26346408 DOI: 10.1111/tid.12454] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 04/24/2015] [Accepted: 08/15/2015] [Indexed: 11/28/2022]
Abstract
BACKGROUND Voriconazole (VOR) levels are highly variable, with potential implications to both efficacy and safety. We hypothesized that VOR therapeutic drug monitoring (TDM) will decrease the incidence of treatment failures and adverse events (AEs). METHODS We initiated a prospective, randomized, non-blinded multicenter study to compare clinical outcomes in adult patients randomized to standard dosing (clinician-driven) vs. TDM (doses adjusted based on levels). VOR trough levels were obtained on day 5, 14, 28, and 42 (or at completion of drug; ± 3 days). Real-time dose adjustments were made to maintain a range between 1-5 μg/mL on the TDM-arm, while levels were assessed retrospectively in the standard-arm. Patient questionnaires were administered to assess subjective AEs. RESULTS The study was discontinued prematurely, after 29 patients were enrolled. Seventeen (58.6%) patients experienced 38 AEs: visual changes (22/38, 57.9%), neurological symptoms (13/38, 34.2%), and liver abnormalities (3/38, 7.9%). VOR was discontinued in 7 (25%) patients because of an AE (4 standard-arm, 3 TDM-arm). VOR levels were frequently out of range in the standard-arm (8 tests >5 μg/mL; 9 tests <1 μg/mL). Three dose changes occurred in the TDM-arm for VOR levels <1 μg/mL. Levels decreased over time in the standard-arm, with mean VOR levels lower at end of therapy compared to TDM (1.3 vs. 4.6 μg/mL, P = 0.008). CONCLUSIONS VOR TDM has become widespread clinical practice, based on known variability in drug levels, which impaired accrual in this study. Although comparative conclusions are limited, observations of variability and waning levels over time support TDM.
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Luong Thi TT, Nguyen Bich N, Nguyen H, Van Meervelt L. Planar geometry of 4-substituted-2,2'-bipyridines synthesized by Sonogashira and Suzuki cross-coupling reactions. CRYSTALLOGR REP+ 2015. [DOI: 10.1134/s1063774515070160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Fisher J, Tran T, Nguyen TT, Nguyen H, Tran TD. Common mental disorders among women, social circumstances and toddler growth in rural Vietnam: a population-based prospective study. Child Care Health Dev 2015; 41:843-52. [PMID: 25708782 DOI: 10.1111/cch.12235] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/17/2015] [Indexed: 11/29/2022]
Abstract
BACKGROUND Common mental disorders (CMD) and adverse social circumstances are widespread among mothers of infants and toddlers in resource-constrained settings. These can undermine early childhood development through compromised caregiving and insufficient access to essential resources. The aim was to examine the effect of maternal CMD and social adversity in the post-partum year on toddler's length-for-age index in a rural low-income setting. METHODS A population-based prospective cohort study of women in Ha Nam province, Vietnam who completed baseline assessments in either late pregnancy or 4-6 weeks post partum and were followed up, with their toddlers, 15 months later. CMD were assessed at both points by psychiatrist-administered Structured Clinical Interviews for Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition Diagnoses. Anthropometric indices were calculated from toddler's age, sex, weight and length using World Health Organization Child Growth Standards. Social adversities were assessed by study-specific questions and locally validated psychometric instruments. The hypothesized model of factors governing toddler's length-for-age Z score (LAZ) was tested using path analysis. RESULTS In total, 211/234 (90.1%) mother-toddler pairs provided complete data. Baseline prevalence of CMD among women was 33.6% and follow-up was 18.5%. The mean LAZ among toddlers was -1.03 and stunting prevalence (LAZ < -2) was 15.6%. Maternal CMD at baseline were indirectly related to toddler LAZ via maternal CMD at follow-up (regression coefficient = -0.05, 95% CI -0.11 to -0.01). Maternal CMD at follow-up was associated significantly with toddler LAZ (regression coefficient = -0.15, 95% CI -0.28 to -0.05). Poorer quality of marital relationship, mothers' experiences of childhood abuse and <30 days dedicated post-partum care were associated indirectly with lower toddler LAZ via maternal CMD. CONCLUSIONS Maternal post-natal CMD are associated with child growth measured by LAZ in this resource-constrained setting. Social adversities affect child growth indirectly through increasing the risk of maternal CMD. Interventions to reduce stunting in low-income settings may need to address maternal CMD and social adversities in order to improve impact.
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Kamimura A, Al-Obaydi S, Nguyen H, Trinh H, Mo W, Doan P, Franchek-Roa K. Intimate partner violence education for medical students in the USA, Vietnam and China. Public Health 2015; 129:1452-8. [DOI: 10.1016/j.puhe.2015.04.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Revised: 12/21/2014] [Accepted: 04/27/2015] [Indexed: 11/16/2022]
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Kaitu'u-Lino T, Hastie R, Cannon P, Nguyen H, Lee S, Hannan N, Tong S. Transcription factors E2F1 and E2F3 are expressed in placenta but do not regulate MMP14. Placenta 2015; 36:932-7. [DOI: 10.1016/j.placenta.2015.06.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 06/09/2015] [Accepted: 06/14/2015] [Indexed: 01/22/2023]
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Ng BJL, Hutyra LR, Nguyen H, Cobb AR, Kai FM, Harvey C, Gandois L. Carbon fluxes from an urban tropical grassland. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2015; 203:227-234. [PMID: 24998996 DOI: 10.1016/j.envpol.2014.06.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Revised: 05/29/2014] [Accepted: 06/03/2014] [Indexed: 06/03/2023]
Abstract
Turfgrass covers a large fraction of the urbanized landscape, but the carbon exchange of urban lawns is poorly understood. We used eddy covariance and flux chambers in a grassland field manipulative experiment to quantify the carbon mass balance in a Singapore tropical turfgrass. We also assessed how management and variations in environmental factors influenced CO2 respiration. Standing aboveground turfgrass biomass was 80 gC m(-2), with a mean ecosystem respiration of 7.9 ± 1.1 μmol m(-2) s(-1). The contribution of autotrophic respiration was 49-76% of total ecosystem respiration. Both chamber and eddy covariance measurements suggest the system was in approximate carbon balance. While we did not observe a significant relationship between the respiration rates and soil temperature or moisture, daytime fluxes increased during the rainy interval, indicating strong overall moisture sensitivity. Turfgrass biomass is small, but given its abundance across the urban landscape, it significantly influences diurnal CO2 concentrations.
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