Publications by authors named "Brandon Ho"

Purpose: To evaluate the effectiveness of lifitegrast ophthalmic solution 5% in alleviating end-of-day dryness and discomfort in symptomatic contact lens (CL) wearers.

Patients And Methods: This was an open-label study in symptomatic CL wearers with ratings of ≥40 for end-of-day dryness on a visual analog scale (VAS; 0-100 scale; 100 worst). Participants wore their habitual CLs and instilled lifitegrast twice daily for 12 weeks with lenses removed.

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Purpose: The aim of this study was to develop a 3D-printed eye model to simulate measuring intraocular pressure (IOP) as a training device, and to assess the correlation between measured IOP using common clinical techniques and actual internal pressure.

Methods: The IOP eye model was designed using CAD software and printed with a resin stereolithography (SLA) 3D-printer (Formlabs 3B, Formlabs Inc., MA, USA).

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Background And Purpose: Identifying amyloid-beta (Aβ)-positive patients is essential for Alzheimer's disease (AD) clinical trials and disease-modifying treatments but currently requires PET or cerebrospinal fluid sampling. Previous MRI-based deep learning models, using only T1-weighted (T1w) images, have shown moderate performance.

Materials And Methods: Multi-contrast MRI and PET-based quantitative Aβ deposition were retrospectively obtained from three public datasets: ADNI, OASIS3, and A4.

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Significance: Contact lens wettability is potentially correlated with friction, which is linked to lens comfort. However, measuring wettability can be highly variable. This study assessed wettability using three techniques for a more accurate profile.

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Background: Triage nurse-initiated imaging orders (TNIO) are a promising strategy to improve emergency department (ED) efficiency and length of stay (LOS). However, limited data exists on the impact of TNIO ultrasounds in pediatric appendicitis and testicular torsion.

Objectives: This study aimed to measure the utilization of TNIO for appendix and testicular ultrasounds and evaluate their impact on LOS.

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Congenital anomalies of the inferior vena cava can predispose adolescents to deep vein thrombosis. A 13-year-old male with left hip pain after a sports injury was found to have extensive deep vein thromobis due to an interrupted inferior vena cava. The diagnosis led to catheter-directed thrombolysis and anticoagulation, resolving symptoms.

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Purpose: Effective diversity, equity, and inclusion (DEI) education is imperative to combat bias across health care organizations. The authors evaluated the effectiveness of interprofessional, simulation-based DEI training in improving clinicians' awareness, attitudes, and abilities regarding bias, racism, inclusion, microaggressions, and equity in the workforce.

Method: From October 2021 to June 2022, interprofessional clinicians at Children's National Hospital in Washington, DC, completed the Interprofessional Debrief on Racism, Equity, and Microaggressions (I-DREAM) training.

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Objective: Evaluate the accuracy and reliability of various generative artificial intelligence (AI) models (ChatGPT-3.5, ChatGPT-4.0, T5, Llama-2, Mistral-Large, and Claude-3 Opus) in predicting Emergency Severity Index (ESI) levels for pediatric emergency department patients and assess the impact of medically oriented fine-tuning.

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Purpose: To characterize the population of surgeons performing anterior cruciate ligament reconstructions (ACLRs) in the United States and investigate the relationships between surgeon volume, career duration, and practice setting on surgical outcomes.

Methods: A large nationwide insurance database was queried for patients undergoing primary ACLR. Provider gender, degree type (allopathic vs osteopathic), practice setting (academic vs private as defined by ACGME affiliation), surgeon volume per year, and career duration were obtained.

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Purpose Of Review: Youth sports are increasingly shifting towards a "pay to play" model which has introduced financial barriers to participation. The Amateur Athletic Union (AAU) is the main organization for club basketball, serving as a platform where young athletes can compete beyond the recreational level. Outside the realm of athletes who have access to state-of-the-art facilities and top-tier coaching, the pathway to playing basketball at the next level may be predominantly available to those who can afford the considerable costs of AAU participation.

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This study attempts to address the challenge of accurately measuring the degradation of biodegradable hydrogels, which are frequently employed in drug delivery for controlled and sustained release. The traditional method utilizes a mass-loss approach, which is cumbersome and time consuming. The aim of this study was to develop an innovative screening platform using a millifluidic device coupled with automated image analysis to measure the degradation of Gelatin methacrylate (GelMA) and the subsequent release of an entrapped wetting agent, polyvinyl alcohol (PVA).

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Analyzing hydrogel microstructure through scanning electron microscopy (SEM) images is crucial in understanding hydrogel properties. However, the analysis of SEM images in hydrogel research heavily relies on the intuition of individual researchers and is constrained by the limited size of the dataset. To address this, we propose SEMPro, a data-driven solution using web-scraping and deep learning (DL) to compile and analyze the structure-property relationships of hydrogels through SEM images.

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The molecular mechanisms and evolutionary changes accompanying synapse development are still poorly understood. Here we generate a cross-species proteomic map of synapse development in the human, macaque and mouse neocortex. By tracking the changes of more than 1,000 postsynaptic density (PSD) proteins from midgestation to young adulthood, we find that PSD maturation in humans separates into three major phases that are dominated by distinct pathways.

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Article Synopsis
  • Breast cancer with BRCA1/2 mutations often recurs and resists treatments like PARP inhibitors, leading to a search for new targeted therapies.
  • Researchers found that losing RNF8 can protect against breast tumors in Brca1-mutant mice, while in human cancer cells, RNF8 deficiency increases DNA damage and leads to cancer cell death through R-loop accumulation.
  • The study reveals that RNF8 interacts with XRN2 to resolve R-loops, and its absence disrupts this process, causing genomic instability and highlighting a synthetic lethal relationship between RNF8 and BRCA1.
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The dual functions of TMEM16F as Ca-activated ion channel and lipid scramblase raise intriguing questions regarding their molecular basis. Intrigued by the ability of the FDA-approved drug niclosamide to inhibit TMEM16F-dependent syncytia formation induced by SARS-CoV-2, we examined cryo-EM structures of TMEM16F with or without bound niclosamide or 1PBC, a known blocker of TMEM16A Ca-activated Cl channel. Here, we report evidence for a lipid scrambling pathway along a groove harboring a lipid trail outside the ion permeation pore.

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The replication checkpoint is essential for accurate DNA replication and repair, and maintenance of genomic integrity when a cell is challenged with genotoxic stress. Several studies have defined the complement of proteins that change subcellular location in the budding yeast following chemically induced DNA replication stress using methyl methanesulfonate (MMS) or hydroxyurea (HU). How these protein movements are regulated remains largely unexplored.

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Information on vaccination rates and factors associated with adherence in persons with HIV (PWH) is limited. We report vaccine adherence in 653 adult PWH attending an urban Infectious Disease Clinic from January 2015 to December 2021. Vaccines evaluated included influenza, pneumococcal, tetanus, hepatitis A virus (HAV) and hepatitis B virus (HBV), human papillomavirus (HPV), and zoster vaccines.

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Background: Over the 70 years since the introduction of plastic into everyday items, plastic waste has become an increasing problem. With over 360 million tonnes of plastics produced every year, solutions for plastic recycling and plastic waste reduction are sorely needed. Recently, multiple enzymes capable of degrading PET (polyethylene terephthalate) plastic have been identified and engineered.

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Article Synopsis
  • - This study presents a new type of flexible electrode array designed for non-invasive monitoring of cervical nerve activity, using silver-silver chloride electrodes and a custom data acquisition system with real-time visualization.
  • - Preliminary tests showed that this electrode design provides a high signal-to-noise ratio for capturing cervical neural recordings, and it has been named Cervical Electroneurography (CEN).
  • - The research identified distinct firing patterns during stress tests on the autonomic nervous system, suggesting potential for future development of a portable CEN device for tracking autonomic regulation changes in both healthy individuals and patients with clinical conditions.
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The budding yeast has long been an outstanding platform for understanding the biology of eukaryotic cells. Robust genetics, cell biology, molecular biology, and biochemistry complement deep and detailed genome annotation, a multitude of genome-scale strain collections for functional genomics, and substantial gene conservation with Metazoa to comprise a powerful model for modern biological research. Recently, the yeast model has demonstrated its utility in a perhaps unexpected area, that of eukaryotic virology.

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Objectives: To evaluate the association between the Child Opportunity Index (COI) and food insecurity.

Study Design: This was a secondary analysis of a comprehensive screening instrument for social determinants of health and behavioral health risks. It was administered in 2 urban pediatric emergency departments to adolescents aged 13-21 years and caregivers of children aged 0-17 years.

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Article Synopsis
  • The TMEM16 family consists of ten related proteins that play various roles in the body, some of which are linked to cancer and respiratory diseases.
  • Two important modulators with potential therapeutic applications are 1PBC, which inhibits tumor growth, and the FDA-approved drug niclosamide, which prevents a specific viral infection by targeting TMEM16F.
  • Researchers have mapped the structures of TMEM16F when bound to these drugs, revealing a common binding site and demonstrating that the drug's interaction can vary between TMEM16A and TMEM16F, paving the way for better-targeted treatments.
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Germline mutations in BRCA1 and BRCA2 (BRCA1/2) genes considerably increase breast and ovarian cancer risk. Given that tumors with these mutations have elevated genomic instability, they exhibit relative vulnerability to certain chemotherapies and targeted treatments based on poly (ADP-ribose) polymerase (PARP) inhibition. However, the molecular mechanisms that influence cancer risk and therapeutic benefit or resistance remain only partially understood.

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The mechanisms generating cancer-initiating mutations are not well understood. Sonic hedgehog (SHH) pathway activation is frequent in medulloblastoma (MB), with PTCH1 mutations being a common initiating event. Here we investigated the role of the developmental mitogen SHH in initiating carcinogenesis in the cells of origin: granule cell progenitors (GCPs).

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