Publications by authors named "Rock J"

Background: As many as 95% of individuals across the lifespan with autism spectrum disorder (ASD) have at least one comorbidity. While research focused only on the health of autistic adolescents is limited, we do know that fewer than 14% of these youth receive appropriate transition services to self-manage their health. These limitations have resulted in poor outcomes and premature mortality.

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  • Idiopathic intracranial hypertension (IIH) primarily affects overweight or obese women of reproductive age, making it crucial to investigate its relationship with pregnancy.
  • A study examined the incidence of IIH development during pregnancy and its association with hypertensive disorders, finding that 7% of IIH patients experienced new onset IIH during their pregnancies.
  • IIH patients had significantly higher risks for various hypertensive disorders like eclampsia, preeclampsia, and HELLP syndrome, as well as complications like ectopic pregnancies and miscarriages, even when controlling for obesity and migraine factors.
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Single-cell RNA-seq (scRNA-seq) has profiled hundreds of millions of human cells across organs, diseases, development, and perturbations to date. Mining these growing atlases could reveal cell-disease associations, discover cell states in unexpected tissue contexts, and relate in vivo biology to in vitro models. These require a common measure of cell similarity across the body and an efficient way to search.

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In the earliest days of the COVID-19 pandemic, the collection of dried blood spots (DBS) enabled public health laboratories to undertake population-scale seroprevalence studies used to estimate rates of SARS-CoV-2 exposure. With SARS-CoV-2 seropositivity levels now estimated to exceed 94% in the United States, attention has turned to using DBS to assess neutralizing antibodies within cohorts of interest. With this goal in mind, we generated contrived DBS (cDBS) and whole blood-derived DBS from convalescent and vaccinated individuals and subjected DBS eluates to a battery of assays, including a SARS-CoV-2 multiplexed microsphere immunoassay (MIA), a receptor binding domain (RBD)-human ACE2 inhibition assay (iACE2), a cell-based pseudovirus neutralization assay, and real-time PCR-based surrogate neutralization assay (NAB-Sure).

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  • This study aimed to evaluate the accuracy of Beta-2 transferrin (B2Tf) gel electrophoresis in diagnosing cerebrospinal fluid (CSF) rhinorrhea among patients with unilateral thin clear rhinorrhea (UTCR), a condition that can indicate various medical issues. !* -
  • Conducted from 2016 to 2024, the study involved 105 patients and showed B2Tf GE had a sensitivity of 89.5% and specificity of 78.3%, with certain causes for false results identified, such as sinusitis and contamination during sample collection. !* -
  • While the findings align with previous literature on test accuracy, the study highlights the need for further research
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Over the past few decades, the global healthcare community has achieved remarkable success in controlling many communicable diseases across various regions. However, non-communicable diseases now constitute a significant portion of disease morbidity and mortality, particularly in low- and middle-income countries (LMICs). Among these, cancer, in particular, is witnessing a notable increase in incidence in many LMICs.

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Neurosurgeons require post-graduate training to deliver safe, effective, and evidence-based care; to continually improve and adapt their methods through assessing the effect of their care and patient outcomes; and to train the future neurosurgeons of tomorrow to surpass current standards of care. We describe methods used by global collaborations to address these training needs on a worldwide scale, their risks, and their perceived benefits.

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  • Nail bed injuries are common, but there is no agreement on whether to replace the nail plate after repair, as it may lead to complications like infection.
  • A study compared outcomes between patients who had nail plate replacement and those who didn’t, measuring aspects like nail growth and patient satisfaction.
  • Results showed no significant differences in nail growth, pain, or satisfaction between the two groups, indicating that nail plate replacement may not be necessary for optimal recovery.
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  • Tetracyclines and vitamin A derivatives, commonly used for acne and anti-aging, are linked to drug-induced intracranial hypertension (DIIH), but treatment practices and visual outcomes have not been well studied.
  • This study examined 839 patients diagnosed with IIH, finding that 8.10% developed DIIH, most of whom (83%) were using medication for acne, predominantly females with an average age of about 25.
  • Only 3 patients experienced poor visual outcomes, and they all used vitamin A derivatives; the study emphasizes the need for immediate intervention if headaches or visual changes occur in patients taking DIIH medications.
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International bootcamps are important for providing access to advanced education and training to physicians around the world. In countries where resources are scarce, the opportunity to be exposed to advanced training and the latest technologies is limited. We set out to evaluate the educational value of integrating augmented reality (AR) into the curriculum of a global neurosurgery bootcamp.

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Wound healing in response to acute injury is mediated by the coordinated and transient activation of parenchymal, stromal, and immune cells that resolves to homeostasis. Environmental, genetic, and epigenetic factors associated with inflammation and aging can lead to persistent activation of the microenvironment and fibrosis. Here, we identify opposing roles of interleukin-4 (IL-4) cytokine signaling in interstitial macrophages and type II alveolar epithelial cells (ATIIs).

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Macrophages are critical for maintenance and repair of mucosal tissues. While functionally distinct subtypes of macrophage are known to have important roles in injury response and repair in the lungs, little is known about macrophages in the proximal conducting airways. Single-cell RNA sequencing and flow cytometry demonstrated murine tracheal macrophages are largely monocyte-derived and are phenotypically distinct from lung macrophages at homeostasis.

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  • CRISPR interference (CRISPRi) is used to identify chemical-genetic interactions (CGIs) by determining how genes react to antibiotic exposure, helping discover potential drug targets and resistance mechanisms.
  • The efficiency of different sgRNAs influences the growth rate of CRISPRi mutants, but optimal sgRNA for detecting drug interactions doesn't always correspond to the most efficient one. There exists a non-linear relationship between sgRNA strength and drug sensitivity.
  • The CRISPRi-DR statistical method improves analysis by integrating sgRNA efficiencies with drug concentrations, showing better precision on complex datasets relative to other methods while effectively identifying gene interactions in microorganisms like Mycobacterium tuberculosis and E. coli.
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Augmented reality (AR) is an emerging technology that can display three-dimensional patient anatomy in the surgeons' field of view. The use of this technology has grown considerably for both presurgical and intraoperative guidance. A patient diagnosed with breast cancer started to experience numbness in the left hand, which progressed to weakness in the left hand and arm.

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Mycobacterium tuberculosis remains the most common infectious killer worldwide despite decades of antitubercular drug development. Effectively controlling the tuberculosis (TB) pandemic will require innovation in drug discovery. In this review, we provide a brief overview of the two main approaches to discovering new TB drugs-phenotypic screens and target-based drug discovery-and outline some of the limitations of each method.

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Background: In the earliest days of COVID-19 pandemic, the collection of dried blood spots (DBS) enabled public health laboratories to undertake population-scale seroprevalence studies to estimate rates of SARS-CoV-2 exposure. With SARS-CoV-2 seropositivity levels now estimated to exceed 94% in the United States, attention has turned to using DBS to assess functional (neutralizing) antibodies within cohorts of interest.

Methods: Contrived DBS eluates from convalescent, fully vaccinated and pre-COVID-19 serum samples were evaluated in SARS-CoV-2 plaque reduction neutralization titer (PRNT) assays, a SARS-CoV-2 specific 8-plex microsphere immunoassay, a cell-based pseudovirus assay, and two different spike-ACE2 inhibition assays, an in-house Luminex-based RBD-ACE2 inhibition assay and a commercial real-time PCR-based inhibition assay (NAB-Sure).

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Drug-resistant bacteria are emerging as a global threat, despite frequently being less fit than their drug-susceptible ancestors. Here we sought to define the mechanisms that drive or buffer the fitness cost of rifampicin resistance (RifR) in the bacterial pathogen Mycobacterium tuberculosis (Mtb). Rifampicin inhibits RNA polymerase (RNAP) and is a cornerstone of modern short-course tuberculosis therapy.

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Augmented reality (AR) is an exciting technology that has garnered considerable attention in the field of neurosurgery. Despite this, clinical use of this technology is still in its infancy. An area of great potential for this technology is the ability to display 3D anatomy overlaid with the patient to assist with presurgical and intraoperative decision-making.

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Mycobacterium tuberculosis (Mtb) is a bacterial pathogen that causes tuberculosis (TB), an infectious disease that is responsible for major health and economic costs worldwide. Mtb encounters diverse environments during its life cycle and responds to these changes largely by reprogramming its transcriptional output. However, the mechanisms of Mtb transcription and how they are regulated remain poorly understood.

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Purpose: To compare the risks of adverse outcomes, including mortality, gastrointestinal bleeding, and venous thromboembolism, between COVID-19 patients with inflammatory bowel disease (IBD) and those without IBD.

Methods: We analyzed data from the National Inpatient Sample between January and December 2020. The study included adult patients with Crohn's disease (CD) and ulcerative colitis (UC) who contracted COVID-19.

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Objective: Objectively examine the effect of 3D-Augmented Reality anatomic review on craniotomy planning among neurosurgical residents as it pertains to craniotomy size, skull positioning, and knowledge of significant anatomic relationships.

Methods: Postgraduate year 1-7 neurosurgery residents were instructed to review standard 2D radiographs, pin a skull, and tailor a craniotomy for 6 different lesions and case vignettes. Participants then reviewed the lesion in a 3D-augmented reality (AR) environment, followed by repeating the craniotomy station for a variety of lesion types and locations (superficial, subcortical, deep, skull base).

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Pathogenic mycobacteria are a significant cause of morbidity and mortality worldwide. The conserved whiB7 stress response reduces the effectiveness of antibiotic therapy by activating several intrinsic antibiotic resistance mechanisms. Despite our comprehensive biochemical understanding of WhiB7, the complex set of signals that induce whiB7 expression remain less clear.

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Background: Augmented reality (AR) is an emerging technology in neurosurgery with the potential to become a strategic tool in the delivery of care and education for trainees. Advances in technology have demonstrated promising use for improving visualization and spatial awareness of critical neuroanatomic structures. In this report, we employ a novel AR registration system for the visualization and targeting of skull landmarks.

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Migratory species with disjunct and localized breeding distributions, including many colonial marine birds, pose challenges for management and conservation as their dynamics are shaped by both broad oceanographic changes and specific factors affecting individual breeding colonies. We compare six colonies of the declining Leach's storm-petrel, Hydrobates leucorhous, across their core range in Atlantic Canada using standard capture-mark-recapture methods to estimate annual survival of individually marked populations of breeding adults. Over the period analysed (5-20 years per colony; 2003-2022), mean annual survival varied among colonies (0.

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