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Wen X, Zhu D, Cheng A, Wang M, Chen S, Jia R, Liu M, Sun K, Zhao X, Yang Q, Wu Y, Chen X. Molecular epidemiology of duck hepatitis a virus types 1 and 3 in China, 2010-2015. Transbound Emerg Dis 2017; 65:10-15. [DOI: 10.1111/tbed.12741] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Indexed: 01/07/2023]
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77
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Khatib B, Cuddy K, Gelesko S, Amundson M, Cheng A, Patel A, Dierks E, Bell R. Application of Virtual Surgical Planning to Staged Management of Self-Inflicted Gunshot Wounds to the Maxillofacial Skeleton: The Oregon Protocol. J Oral Maxillofac Surg 2017. [DOI: 10.1016/j.joms.2017.07.070] [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]
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78
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Cheng A, Chen H, Schwartz Z, Boyan BD. Imaging analysis of the interface between osteoblasts and microrough surfaces of laser-sintered titanium alloy constructs. J Microsc 2017; 270:41-52. [PMID: 28960365 DOI: 10.1111/jmi.12648] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 08/07/2017] [Accepted: 09/07/2017] [Indexed: 11/30/2022]
Abstract
Previous work using focused ion beam (FIB) analysis of osteoblasts on smooth and microrough Ti surfaces showed that the average cell aspect ratio and distance from the surface are greater on the rough surface. In order to better interrogate the relationship between individual cells and their substrate using multiple imaging modalities, we developed a method that tracks the same cell across confocal laser scanning microscopy (CLSM) to correlate surface microroughness with cell morphology and cytoskeleton; scanning electron microscopy (SEM) to provide higher resolution for observation of nanoroughness as well as chemical mapping via energy dispersive X-ray spectroscopy; and transmission electron microscopy (TEM) for high-resolution imaging. FIB was used to prepare thin sections of the cell-material interface for TEM, or for three-dimensional electron tomography. Cells were cultured on laser-sintered Ti-6Al-4V substrates with polished or etched surfaces. Direct cell to surface attachments were observed across surfaces, though bridging across macroscale surface features occurred on rough substrates. Our results show that surface roughness, cell cytoskeleton and gross morphology can be correlated with the cell-material cross-sectional interface at the single cell level across multiple high-resolution imaging modalities. This work provides a platform method for further investigating mechanisms of the cell-material interface.
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79
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Lee YS, Biddle S, Chan MF, Cheng A, Cheong M, Chong YS, Foo LL, Lee CH, Lim SC, Ong WS, Pang J, Pasupathy S, Sloan R, Seow M, Soon G, Tan B, Tan TC, Teo SL, Tham KW, van Dam RM, Wang J. Health Promotion Board-Ministry of Health Clinical Practice Guidelines: Obesity. Singapore Med J 2017; 57:472. [PMID: 27550044 DOI: 10.11622/smedj.2016141] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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80
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Cheng A, Auricchio A, Schloss E, Sterns L, Gerritse B, Kurita T, Meijer A, Brown M, Ellenbogen K. P3261SVT discrimination algorithms significantly reduce the rates of inappropriate therapies in the setting of modern day delayed high-rate detection programming. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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81
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Boyan BD, Cheng A, Olivares-Navarrete R, Schwartz Z. Implant Surface Design Regulates Mesenchymal Stem Cell Differentiation and Maturation. Adv Dent Res 2017; 28:10-7. [PMID: 26927483 DOI: 10.1177/0022034515624444] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Changes in dental implant materials, structural design, and surface properties can all affect biological response. While bulk properties are important for mechanical stability of the implant, surface design ultimately contributes to osseointegration. This article reviews the surface parameters of dental implant materials that contribute to improved cell response and osseointegration. In particular, we focus on how surface design affects mesenchymal cell response and differentiation into the osteoblast lineage. Surface roughness has been largely studied at the microscale, but recent studies have highlighted the importance of hierarchical micron/submicron/nanosurface roughness, as well as surface roughness in combination with surface wettability. Integrins are transmembrane receptors that recognize changes in the surface and mediate downstream signaling pathways. Specifically, the noncanonical Wnt5a pathway has been implicated in osteoblastic differentiation of cells on titanium implant surfaces. However, much remains to be elucidated. Only recently have studies been conducted on the differences in biological response to implants based on sex, age, and clinical factors; these all point toward differences that advocate for patient-specific implant design. Finally, challenges in implant surface characterization must be addressed to optimize and compare data across studies. An understanding of both the science and the biology of the materials is crucial for developing novel dental implant materials and surface modifications for improved osseointegration.
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82
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Proctor L, Pradhan M, Leung S, Cheng A, Lee CH, Soslow RA, Gilks CB, Talhouk A, McAlpine JM, Danielsen HE, Hoang LN. Assessment of DNA Ploidy in the ProMisE molecular subgroups of endometrial cancer. Gynecol Oncol 2017. [PMID: 28647100 DOI: 10.1016/j.ygyno.2017.06.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
OBJECTIVE We sought to determine whether DNA ploidy correlates with the four molecular subgroups of endometrial carcinoma (EC) as determined using ProMisE (Proactive Molecular Risk Classifier for Endometrial Cancer). METHODS 90 cases of EC previously characterized by clinicopathological parameters, outcomes, and ProMisE molecular subgroup (POLE EDM, MMR-D, p53 wt or p53 abn) were assessed for DNA ploidy using image cytometry. Associations of ploidy with traditional clinicopathological parameters were also tested. RESULTS Abnormal DNA ploidy status differed amongst the ProMisE groups (p<0.001) and was found in 80.9% (17/21) of p53 abn, 37.0% (10/27) of p53 wt, 28.6% (4/14) of POLE EDM and 14.3% (4/28) of MMR-D. Abnormal DNA content was significantly associated with lower BMI (p=0.034) and grade 3 tumors (p=0.001). In the entire cohort, abnormal DNA content was significantly associated with worse progression free survival (p=0.0094) but not disease specific survival (p=0.249) or overall survival (p=0.187). When examining ploidy within each of the ProMisE groups, abnormal DNA content correlated with worse overall survival (p=0.041) and progression free survival (p=0.011) in the MMR-D group. No statistically significant relationship was seen in the remaining 3 groups. CONCLUSION Abnormal DNA ploidy status did correlate with the molecular subgroups of EC; abnormal DNA content was seen in the large majority of p53 abn cases. Abnormal ploidy however was also seen in smaller numbers in the p53 wt, POLE EDM and MMR-D groups; therefore abnormal DNA content was not a specific marker for any one molecular group. The addition of ploidy to the ProMisE molecular categories conferred additional prognostic value within the MMR-D group, which merits further study.
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83
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Bayetto K, Cheng A, Sambrook P. Necrotizing fasciitis as a complication of odontogenic infection: a review of management and case series. Aust Dent J 2017; 62:317-322. [PMID: 28241379 DOI: 10.1111/adj.12508] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/22/2017] [Indexed: 12/15/2022]
Abstract
BACKGROUND The aims of the present study were to establish the incidence of head and neck necrotizing fasciitis (NF) in the Adelaide Oral and Maxillofacial Surgery Unit; review the current literature regarding the management of head and neck NF; and determine the evidence for the role of hyperbaric oxygen therapy in the management of NF. METHODS A retrospective audit of all patients admitted to the Royal Adelaide Hospital Oral and Maxillofacial Surgery Unit 2006-2015 with severe odontogenic infections was carried out. Patient demographics were recorded and treatment details were collected and analysed. RESULTS A total of 672 patients were admitted for management of severe odontogenic infections. Of these, three were identified as NF. One case was treated using hyperbaric oxygen as an adjunct to conventional surgical and medical management. Two cases were managed using aggressive surgical management alone. Two patients survived. The incidence of head and neck NF in South Australia is 48/100 000 infections per year. CONCLUSIONS The first-line treatment of severe odontogenic infections remains conventional surgical and medical management; however, hyperbaric oxygen therapy may have an additional role in the management of NF and other rare severe infections in medically complex patients.
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84
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Sax P, Dejesus E, Ward D, Benson P, Wei X, White K, Martin H, Cheng A, Durand F, Quirk E. Essai randomisé de bictégravir ou dolutégravir en association avec FTC/TAF en initiation de traitement du VIH. Med Mal Infect 2017. [DOI: 10.1016/j.medmal.2017.03.336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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85
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Liau I, Cheng A, Sambrook P. Minimally invasive endoscopically-assisted middle cranial fossa reconstruction following traumatic intrusion of mandibular condyle. Int J Oral Maxillofac Surg 2017. [DOI: 10.1016/j.ijom.2017.02.886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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86
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Bayetto K, Davis J, Sambrook P, Stein B, Cheng A. Multidisciplinary team meetings frequently encounter potential medicolegal risks: an audit and consideration of the legal duties involved. Int J Oral Maxillofac Surg 2017. [DOI: 10.1016/j.ijom.2017.02.406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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87
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Sim F, Cheng A, Patel A, Kaleem A, Dierks E, Bell R. Virtual surgical planning in head and neck tumour and reconstructive surgery. Int J Oral Maxillofac Surg 2017. [DOI: 10.1016/j.ijom.2017.02.656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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88
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Sim F, Ying Y, Patel A, Cheng A, Bell R, Bui T, Dierks E. Onlay Adipofascial Flap for Pharyngotomy Defects Post Salvage Laryngectomy: A Case Series Review. J Oral Maxillofac Surg 2016. [DOI: 10.1016/j.joms.2016.06.081] [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]
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89
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Vail G, Cheng A, Han YR, Zhao T, Du S, Loy MMT, Herrup K, Plummer MR. ATM protein is located on presynaptic vesicles and its deficit leads to failures in synaptic plasticity. J Neurophysiol 2016; 116:201-9. [PMID: 27075534 PMCID: PMC4961758 DOI: 10.1152/jn.00006.2016] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 04/12/2016] [Indexed: 01/07/2023] Open
Abstract
Ataxia telangiectasia is a multisystemic disorder that includes a devastating neurodegeneration phenotype. The ATM (ataxia-telangiectasia mutated) protein is well-known for its role in the DNA damage response, yet ATM is also found in association with cytoplasmic vesicular structures: endosomes and lysosomes, as well as neuronal synaptic vesicles. In keeping with this latter association, electrical stimulation of the Schaffer collateral pathway in hippocampal slices from ATM-deficient mice does not elicit normal long-term potentiation (LTP). The current study was undertaken to assess the nature of this deficit. Theta burst-induced LTP was reduced in Atm(-/-) animals, with the reduction most pronounced at burst stimuli that included 6 or greater trains. To assess whether the deficit was associated with a pre- or postsynaptic failure, we analyzed paired-pulse facilitation and found that it too was significantly reduced in Atm(-/-) mice. This indicates a deficit in presynaptic function. As further evidence that these synaptic effects of ATM deficiency were presynaptic, we used stochastic optical reconstruction microscopy. Three-dimensional reconstruction revealed that ATM is significantly more closely associated with Piccolo (a presynaptic marker) than with Homer1 (a postsynaptic marker). These results underline how, in addition to its nuclear functions, ATM plays an important functional role in the neuronal synapse where it participates in the regulation of presynaptic vesicle physiology.
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Cheng A, Tan YZ, Dandey VP, Potter CS, Carragher B. Strategies for Automated CryoEM Data Collection Using Direct Detectors. Methods Enzymol 2016; 579:87-102. [PMID: 27572724 DOI: 10.1016/bs.mie.2016.04.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/01/2023]
Abstract
The new generation of direct electron detectors has been a major contributor to the recent resolution revolution in cryo-electron microscopy. Optimal use of these new cameras using automated data collection software is critical for high-throughput near-atomic resolution cryo-electron microscopy research. We present an overview of the practical aspects of automated data collection in the context of this new generation of direct detectors, highlighting the differences, challenges, and opportunities the new detectors provide compared to the previous generation of data acquisition media.
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91
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Ford T, Cheng A, Youssef G, Sader M, Rees D. PS164 Underdosing of Noacs for AF: Old Habits Die Hard. Glob Heart 2016. [DOI: 10.1016/j.gheart.2016.03.140] [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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92
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Raffi F, Slama L, Yazdanpanah Y, Chéret A, Reynes J, Mingjin Y, Cheng A, Rhee M. VIH-15 - Ténofovir alafénamide en remplacement de ténofovir disoproxil fumarate chez des adultes en succès virologique. Med Mal Infect 2016. [DOI: 10.1016/s0399-077x(16)30560-1] [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]
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93
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Zhao T, Lau SC, Wang Y, Su Y, Wang H, Cheng A, Herrup K, Ip NY, Du S, Loy MMT. Multicolor 4D Fluorescence Microscopy using Ultrathin Bessel Light Sheets. Sci Rep 2016; 6:26159. [PMID: 27189786 PMCID: PMC4870613 DOI: 10.1038/srep26159] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 04/26/2016] [Indexed: 01/06/2023] Open
Abstract
We demonstrate a simple and efficient method for producing ultrathin Bessel (‘non-diffracting’) light sheets of any color using a line-shaped beam and an annulus filter. With this robust and cost-effective technology, we obtained two-color, 3D images of biological samples with lateral/axial resolution of 250 nm/400 nm, and high-speed, 4D volume imaging of 20 μm sized live sample at 1 Hz temporal resolution.
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94
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Black M, Trivedi J, Schumer E, Cheng A, Massey H, Slaughter M. Treating the Failing Heart: An Evaluation of the Past Decade. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.170] [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] Open
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95
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Cheng A, Trivedi J, Schumer E, Slaughter M, Massey H. Prolonged Left Ventricular Assist Device Support Does Not Affect Post-Transplantation Survival. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.837] [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] Open
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96
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Cheng A, Trivedi J, Van Berkel V, Massey H, Slaughter M. Donor and Recipient Risk Factors for Combined Heart-Lung Transplantation. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.380] [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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97
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Bitar A, Abramov D, Vijayakrishnan R, Lenneman A, Trivedi J, Massey T, Cheng A, Slaughter M, Birks E. The Use of Integrilin Alone or in Combination with Heparin or Argatroban for Suspected Pump Thrombosis in Patients with Left Ventricular Assist Devices. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.716] [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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98
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Morrissey O, Snell G, Levvey B, Westall G, Cheng A, Bills H. Clinical Characteristics and Outcomes of Mycobacterium abscessus Isolation in Lung Transplant Candidates and Recipients: A Systematic Review. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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99
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Trivedi J, Schumer E, Black M, Massey H, Cheng A, Slaughter M. Risk Factors of Waiting List Mortality for Patients Awaiting Heart Transplant. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.602] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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100
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Daleu CL, Plant RS, Woolnough SJ, Sessions S, Herman MJ, Sobel A, Wang S, Kim D, Cheng A, Bellon G, Peyrille P, Ferry F, Siebesma P, van Ulft L. Intercomparison of methods of coupling between convection and large-scale circulation: 2. Comparison over nonuniform surface conditions. JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS 2016; 8:387-405. [PMID: 27642501 PMCID: PMC5008117 DOI: 10.1002/2015ms000570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Accepted: 02/25/2016] [Indexed: 06/06/2023]
Abstract
As part of an international intercomparison project, the weak temperature gradient (WTG) and damped gravity wave (DGW) methods are used to parameterize large-scale dynamics in a set of cloud-resolving models (CRMs) and single column models (SCMs). The WTG or DGW method is implemented using a configuration that couples a model to a reference state defined with profiles obtained from the same model in radiative-convective equilibrium. We investigated the sensitivity of each model to changes in SST, given a fixed reference state. We performed a systematic comparison of the WTG and DGW methods in different models, and a systematic comparison of the behavior of those models using the WTG method and the DGW method. The sensitivity to the SST depends on both the large-scale parameterization method and the choice of the cloud model. In general, SCMs display a wider range of behaviors than CRMs. All CRMs using either the WTG or DGW method show an increase of precipitation with SST, while SCMs show sensitivities which are not always monotonic. CRMs using either the WTG or DGW method show a similar relationship between mean precipitation rate and column-relative humidity, while SCMs exhibit a much wider range of behaviors. DGW simulations produce large-scale velocity profiles which are smoother and less top-heavy compared to those produced by the WTG simulations. These large-scale parameterization methods provide a useful tool to identify the impact of parameterization differences on model behavior in the presence of two-way feedback between convection and the large-scale circulation.
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