Publications by authors named "Clark G"

Schlemm's canal endothelial cells (SECs) serve as the final barrier to aqueous humor (AQH) drainage from the eye. SECs adjust permeability to AQH outflow to modulate intraocular pressure (IOP). The broad identification of IOP-related genes implicates SECs in glaucoma.

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Introduction: Total knee arthroplasty (TKA) in severe varus deformity still remains a challenge. Alternative alignment TKA aims to improve outcomes and satisfaction. The purpose of this study is to report on the outcomes of a functionally aligned TKA in severe varus deformity.

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Aims: Unicompartmental knee arthroplasty (UKA) and total knee arthroplasty (TKA) have both been shown to be effective treatments for osteoarthritis (OA) of the knee. Many studies have compared the outcomes of the two treatments, but less so with the use of robotics, or individualized TKA alignment techniques. Functional alignment (FA) is a novel technique for performing a TKA and shares many principles with UKA.

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Programmed cell death (PCD) is a crucial, genetically-encoded, and evolutionarily-conserved process required for development and homeostasis. We previously identified a genetically non-apoptotic, highly ordered, and stereotyped killing program called Compartmentalized Cell Elimination (CCE) in the C. elegans tail-spike epithelial cell (TSC).

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Aims: Functional alignment (FA) in total knee arthroplasty (TKA) aims to achieve balanced gaps by adjusting implant positioning while minimizing changes to constitutional joint line obliquity (JLO). Although FA uses kinematic alignment (KA) as a starting point, the final implant positions can vary significantly between these two approaches. This study used the Coronal Plane Alignment of the Knee (CPAK) classification to compare differences between KA and final FA positions.

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Magnetic reconnection has been commonly reported between the solar wind IMF and the magnetic field of Earth and other planets. A similar phenomenon is expected between Jupiter's magnetosphere and Ganymede's mini magnetosphere inside the Jovian magnetosphere. This article is the first report of a reconnection event in the tail region of Ganymede.

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Coxsackievirus A6 (CVA6) has become increasingly clinically relevant as a cause of Hand, Foot and Mouth Disease (HFMD) globally since 2008. However, most laboratories do not routinely determine the enteroviral type of positive samples. The non-pharmaceutical measures introduced to curb transmission during the COVID-19 pandemic may also have perturbed CVA6 epidemiology.

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Article Synopsis
  • The study investigates ancient microbiomes in archaeological dental calculus from 102 individuals across 10 Pacific islands and one island in Southeast Asia over ~3000 years, revealing insights into human migration patterns.
  • DNA from oral microbiomes in dental calculus is better preserved than human DNA from bones, allowing for a clearer analysis of historical microbial communities.
  • The oral microbial communities from the Pacific and Island Southeast Asia are distinct from those in Europe, Africa, and Asia, indicating that geographic factors influence the composition of these ancient microbiomes.
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Neuroprostheses typically operate under supervised learning, in which a machine-learning algorithm is trained to correlate neural or myoelectric activity with an individual's motor intent. Due to the stochastic nature of neuromyoelectric signals, algorithm performance decays over time. This decay is accelerated when attempting to regress proportional control of multiple joints in parallel, compared with the more typical classification-based pattern recognition control.

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The study of invertebrate pathology relies on histopathological tools to define visible internal structures and processes in understudied taxa like spiders. Histopathology involves the infiltration of tissues and organ structures with wax or resin, allowing for the visualisation of cellular anatomy and morphological structure, which can lead to the identification of abnormalities (e.g.

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Study Objective: This study investigates the potential to improve emergency department (ED) triage using machine learning models by comparing their predictive performance with the Canadian Triage Acuity Scale (CTAS) in identifying the need for critical care within 12 h of ED arrival.

Methods: Three machine learning models (LASSO regression, gradient-boosted trees, and a deep learning model with embeddings) were developed using retrospective data from 670,841 ED visits to the Jewish General Hospital from June 2012 to Jan 2021. The model outcome was the need for critical care within the first 12 h of ED arrival.

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High-resolution computed tomography (HRCT) has become a widely used tool for studying the inner ear morphology of vertebrates. Amphisbaenians are one of the most specialized groups of fossorial reptiles but are poorly understood relative to other squamate reptile. In this paper we survey the anatomy of the inner and middle ear of these fossorial reptiles using HRCT models and we describe qualitatively and quantitatively (using 3D morphometrics) the anatomy of the inner ear.

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Article Synopsis
  • Schlemm's canal (SC) plays a crucial role in regulating intraocular pressure, but its detailed biology is not fully understood, leading researchers to conduct extensive RNA sequencing on significant numbers of Schlemm's canal endothelial cells (SECs).
  • The study identified three distinct molecular classes of SECs, differentiating between the inner and outer walls, and discovered variations in the inner wall cells that suggest their functions may be influenced by their local environment.
  • Findings highlight the importance of cell junctions in fluid permeability and reveal interactions between SECs and adjacent trabecular meshwork cells, laying a new molecular groundwork for understanding glaucomatous processes and potential treatments.
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Article Synopsis
  • - The study evaluates the effectiveness of two myoelectric prosthetic wrists (a commercial one and a new affordable "Utah wrist") in improving task performance for transradial amputees during a specific task.
  • - Results showed a significant reduction in task failure rates and compensatory movements when participants used the prosthetic wrists compared to when they did not use them.
  • - Importantly, using the prosthetic wrists did not increase cognitive load for users, suggesting they enhance dexterity without making the task mentally more challenging.
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AbstractSuccessional dynamics can vary because of a range of ecological and environmental factors, but our understanding of biogeographic variation in succession, and the processes contributing to community development across ecosystems, is limited. The pattern and rate of recruitment of dispersive propagules likely differs over large spatial scales and can be an important predictor of successional trajectory. Over a 20° tropical-temperate latitudinal gradient, we measured sessile invertebrates over 12 months of community development and successive 3-month recruitment windows to understand succession and how it is influenced by recruitment.

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In pandemic mitigation, strategies such as social distancing and mask-wearing are vital to prevent disease resurgence. Yet, monitoring adherence is challenging, as individuals might be reluctant to share behavioral data with public health authorities. To address this challenge and demonstrate a framework for conducting observational research with sensitive data in a privacy-conscious manner, we employ a privacy-centric epidemiological study design: the federated cohort.

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NORE1A (RASSF5) is a tumor suppressor that is frequently down-regulated in liver tumors. It is an upstream component of the HIPPO pathway, a key regulator of liver development and metabolism. HIPPO disruption can lead to the development of MASLD/MASH.

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Introduction: The COVID-19 pandemic disrupted normal pathways to cancer diagnosis, particularly for screening and non-acute symptomatic patients. While reductions in overall cancer diagnoses have been reported elsewhere, any differential effects on emergency presentations, which are associated with poorer outcomes, have not been described.

Material And Methods: Cross-sectional descriptive study from 2015 to 2021, based on International Cancer Benchmarking Partnership methods, where emergency route to diagnosis is defined as presenting as an emergency admission in the 30 days prior to cancer incidence date.

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The behavioral health workforce has been experiencing deepening problems with recruitment and retention, particularly in publicly funded settings serving individuals with serious mental illnesses. This quality improvement project gathered Assertive Community Treatment (ACT) participant (service user) and provider perspectives on workforce challenges. The authors conducted 8 interviews with ACT participants and 9 focus groups with ACT current staff, team leaders, and former staff.

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Objective: The cannabidiol (CBD) Expanded Access Program provided compassionate access to CBD for patients with treatment-resistant epilepsy, including tuberous sclerosis complex (TSC), at 35 US epilepsy centers. Here, we present the long-term efficacy and safety outcomes for add-on CBD treatment in patients with TSC.

Methods: Patients received plant-derived, highly purified CBD (Epidiolex® 100 mg/mL, oral solution), increasing from 2 to 10 mg/kg/d to tolerance or maximum of 25-50 mg/kg/d.

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Light availability and habitat complexity are two key drivers of community assembly. Urbanisation has been shown to affect both, with important consequences to ecological communities. On the intertidal, for instance, studies have shown that light intensity is greater on natural rocky shores than on less complex artificial habitats (seawalls), though different habitats can also experience similar light intensities, for example when shaded by urban structures.

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Implicit visuomotor sequence learning is crucial for acquiring skills that result in automated behaviors. The oscillatory dynamics underpinning this learning process are not well understood. To address this gap, the current study employed electroencephalography with a medium-density array (64 electrodes) to investigate oscillatory activity associated with implicit visuomotor sequence learning in the Serial Reaction Time task.

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Objective: Approximately 10% of patients with mild traumatic brain injury (TBI) present with intracranial bleeding, and only 3.5% eventually require neurosurgical intervention, which often necessitates interhospital transfer. Better guidelines and recommendations are needed to manage complicated mild TBI in the emergency department (ED).

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Pepino () is an herbaceous crop phylogenetically related to tomato and potato. Pepino fruit vary in color, size and shape, and are eaten fresh. In this study, we use pepino as a fruit model to understand the transcriptional regulatory mechanisms controlling fruit quality.

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Purpose: Mid-flexion instability has been identified as a cause for dissatisfaction following total knee arthroplasty (TKA). Robotic-assisted surgery using the Mako robot only allows for assessment of stability at 10° and 90°. This study aimed to investigate any evidence of mid-flexion instability in Mako-assisted TKA.

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