Publications by authors named "Cohen Daniel"

Objective: To validate a universal neuropsychological model that suggests that disorders of the self are best conceptualized as disintegrated neuropsychological processes (i.e., sensations, mental experiences) that lack a sense of relationship to the unified experience/sense of self.

View Article and Find Full Text PDF

We used molecular testing to examine the causes of bloody diarrhea in a multicenter study of pediatric gastroenteritis. Pathogens typically associated with bloody diarrhea were detected in less than half of cases, and inappropriate antibiotic use was common, supporting the use of stool testing in patients with bloody diarrhea.

View Article and Find Full Text PDF

Age-dependent changes in DNA methylation allow chronological and biological age inference, but the underlying mechanisms remain unclear. Using ultra-deep sequencing of >300 blood samples from healthy individuals, we show that age-dependent DNA methylation changes are regional and occur at multiple adjacent CpG sites, either stochastically or in a coordinated block-like manner. Deep learning analysis of single-molecule patterns in two genomic loci achieved accurate age prediction with a median error of 1.

View Article and Find Full Text PDF

Despite the widespread popularity of the "scratch assay," where a pipette is dragged manually through cultured tissue to create a gap to study cell migration and healing, it carries significant drawbacks. Its heavy reliance on manual technique can complicate quantification, reduce throughput, and limit the versatility and reproducibility. We present an open-source, low-cost, accessible, robotic scratching platform that addresses all of the core issues.

View Article and Find Full Text PDF
Article Synopsis
  • Intramedullary stem extensions are added during revision total knee arthroplasty (TKA) to improve component fixation and longevity, often using hybrid fixation methods.
  • The study involved a retrospective review of 153 patients re-evaluating the prevalence and impact of radiographic sclerotic lines at the bone-implant interface over a follow-up period of 15 years.
  • Results showed that while 7.8% of patients had sclerotic lines, they did not significantly affect the rates of aseptic loosening, with a notable long-term survivorship rate of 94.8% free from failure due to loosening.
View Article and Find Full Text PDF

Introduction: There is limited data on the histopathological effects of hemostatic agents (HAs) used during endoscopic submucosal dissection (ESD). We used an porcine model to compare the tissue effects of tranexamic acid (TXA) and adrenaline (epinephrine) compared to controls.

Methods: Standard ESD, using a 2 mm flash-knife, was performed in three pigs.

View Article and Find Full Text PDF

The ability to precisely pattern cells and proteins is crucial in various scientific disciplines, including cell biology, bioengineering, and materials chemistry. Current techniques, such as microcontact stamping, 3D bioprinting, and direct photopatterning, have limitations in terms of cost, versatility, and throughput. In this Article, we present an accessible approach that combines the throughput of photomask systems with the versatility of programmable light patterning using a low-cost consumer LCD resin printer.

View Article and Find Full Text PDF
Article Synopsis
  • A study investigated sex-based differences in colonoscopy indications and findings by analyzing data from 287,930 colonoscopy procedures performed between 2016 and 2021.
  • Results showed that women were more likely to undergo colonoscopies due to abdominal pain, constipation, diarrhea, and anemia, while men had more procedures related to positive FOBT, rectal bleeding, and surveillance.
  • In terms of findings, men had higher rates of colorectal cancer and polyps, while women had better bowel preparation, underscoring the need for tailored approaches in diagnosing and managing gastrointestinal diseases based on sex.
View Article and Find Full Text PDF

Aim: We aimed to investigate the association between Glucagon-like-peptide-1 receptors agonists (GLP1-RA) use and gastric residue on esophagogastroduodenoscopy (EGD).

Methods: A multicenter, retrospective study included all EGDs conducted across seven gastroenterology departments. EGDs with the diagnosis of "poor preparation" or described as a poor preparation in the endoscopist's report were considered as gastric residue.

View Article and Find Full Text PDF

Esophageal high-resolution manometry (HRM) is the gold standard for diagnosing esophageal motility disorders, but it may be poorly tolerated and unsuccessful. We sought to evaluate a protocol for sedation and endoscopy-assisted (SEA) HRM in patients who previously failed standard HRM and assess patient perspectives towards it. Adult patients who previously failed HRM were prospectively enrolled.

View Article and Find Full Text PDF
Article Synopsis
  • GLP-1 receptor agonists (GLP-1RAs) slow down gastric emptying and may affect bowel preparation for colonoscopy, but their impact on bowel preparation adequacy was under-studied.
  • A multicenter study compared 4,876 patients using GLP-1RAs with 4,876 matched controls, finding that 10% of GLP-1RA users had inadequate bowel preparation (IBP), compared to just 4% of controls.
  • Results indicated that both diabetes and GLP-1RA usage independently increased the risk of IBP, suggesting that special attention is needed for these patients.
View Article and Find Full Text PDF
Article Synopsis
  • - This study focused on community-acquired pneumonia (CAP) in children, aiming to identify mucosal biomarkers that can aid in determining the severity and cause of the illness.
  • - Researchers analyzed cytokine levels in nasopharyngeal samples from 182 children with CAP and 26 healthy controls, finding that those with atypical bacteria and influenza virus had significantly elevated cytokine concentrations compared to those with typical bacteria.
  • - The findings suggest that differences in inflammatory and antiviral cytokine levels correlate with disease severity in CAP, indicating that mucosal biomarkers might be helpful for better assessing and classifying the condition in pediatric patients.
View Article and Find Full Text PDF
Article Synopsis
  • The text discusses the traditional "scratch assay," a method used to study cell migration and healing by creating injury gaps in cultured tissue, highlighting the challenges of manual techniques that affect reproducibility and efficiency.
  • It introduces a new open-source, low-cost robotic scratching platform that overcomes these limitations, allowing for precise and reproducible scratches in various tissue types while maintaining high throughput.
  • The robotic system also offers innovative features like sculpting specific tissue shapes and facilitating complex co-culture experiments, enhancing its utility for advanced tissue engineering and cell research.
View Article and Find Full Text PDF

Pre-existing anti-AAV antibodies can be detected using ligand binding-based assay formats. One such format is the MSD-based bridging assay, which uses sulfo-tag-labeled AAV vectors as detection reagents. However, no method has been developed to accurately measure the degree of sulfo-tag labeling on AAV vectors.

View Article and Find Full Text PDF

: Terminal ileitis (TI) is often identified on CT scans in emergency settings. Diagnosing Crohn's disease (CD) as a cause of TI is crucial due to its significant long-term implications. This study aimed to differentiate CD from other causes of acute TI and develop a predictive model for CD diagnosis.

View Article and Find Full Text PDF

Unlabelled: Ileocolic intussusception, a major cause of acute intestinal obstruction in young children, necessitates rapid diagnosis and a multidisciplinary treatment approach. A recent large study identified variations in pain management, sedation, and non-operative reduction methods in these patients. We aimed to explore variability within the diagnostic and treatment pathways of ileocolic intussusception.

View Article and Find Full Text PDF
Article Synopsis
  • Gastrointestinal angiodysplasia (GIAD) is a rare condition, with an overall prevalence of 0.092%, primarily affecting older adults, particularly those aged 71-80, where the prevalence peaks at 0.37%.
  • A study identified significant risk factors for GIAD, including liver cirrhosis, hypertension, and aortic stenosis, along with demographic factors like female gender, and noted that GIADs are less common in patients with malignancies.
  • Understanding the associated clinical conditions and demographics of GIAD can aid in better recognizing its causes and developing effective treatment strategies for this rare gastrointestinal issue.
View Article and Find Full Text PDF
Article Synopsis
  • Cell-cell interactions are more realistic in 3D environments compared to traditional 2D Petri dish setups.
  • The authors present a simple method for creating a 3D cell environment using a 2D extracellular matrix and a vertical boundary treated with E-cadherin.
  • This approach allows biology labs to study cell adhesion in a more natural, three-dimensional way without the need for complex equipment.
View Article and Find Full Text PDF
Article Synopsis
  • This study focused on developing composite scores for two new cognitive assessments aimed at early-stage Alzheimer's disease (AD) to evaluate their effectiveness and compare them with traditional measures.
  • Researchers analyzed data from 291 older adults to assess the reliability and validity of the new assessments, utilizing exploratory factor analyses to understand their structure.
  • The findings indicated that the new measures, No Practice Effect (NPE) and Miami Computerized Functional Skills Assessment, have superior psychometric properties and stronger links to AD risk markers, suggesting their potential use in clinical trials for early Alzheimer's detection.
View Article and Find Full Text PDF
Article Synopsis
  • - This study explored how different foot positions affect the mechanics of the ankle joint and vertical ground reaction forces during jump landings in professional ballet dancers across various starting positions.
  • - Using a high-tech motion capture system, researchers analyzed the jumps of 27 dancers, looking specifically at ankle mechanics, landing forces, and jump height across positions like parallel, first, second, fourth, and fifth.
  • - Results showed that ankle mechanics, especially power in the transverse plane during jumps in the fourth position, significantly impacted performance, suggesting that dancers should regain ankle motion before jumping in those positions post-injury, and that specific training for ankle stability is important.
View Article and Find Full Text PDF
Article Synopsis
  • Epithelial monolayers are important for studying how groups of cells move together, and they can be influenced by electric fields in a phenomenon called electrotaxis.
  • This research develops a mathematical model to predict how these cell layers respond to electric fields and uses optimal control theory to find the best electric field designs for various movement goals.
  • The study creates a comprehensive approach for controlling collective cell migration, which can help inform strategies for guiding cells with different external signals in the future.
View Article and Find Full Text PDF

A novel deep-ridge laser structure with atomic-layer deposition (ALD) sidewall passivation was proposed that enhances the optical characteristics of 8-µm ridge width III-nitride violet lasers on freestanding m-plane GaN substrates. The internal loss was determined using the variable stripe length method, where the laser structure with ALD sidewall passivation showed lower internal loss compared to the conventional shallow-ridge laser design. ALD sidewall passivation plays a critical role in device improvements; compared to the lasers without ALD sidewall passivation, the lasers with ALD sidewall passivation yield improved optoelectrical performance and longer lifetime under continuous-wave operation at high current density.

View Article and Find Full Text PDF

Receptor tyrosine kinases (RTKs) are thought to play key roles in coordinating cell movement at single-cell and tissue scales. The recent development of optogenetic tools for controlling RTKs and their downstream signaling pathways suggested these responses may be amenable to engineering-based control for sculpting tissue shape and function. Here, we report that a light-controlled EGF receptor (OptoEGFR) can be deployed in epithelial cell lines for precise, programmable control of long-range tissue movements.

View Article and Find Full Text PDF

Background: Hematuria is a cardinal symptom of urinary tract cancer and would require further investigations.

Objective: To determine the ability of renal bladder ultrasound (RBUS) with the Hematuria Cancer Risk Score (HCRS) to inform cystoscopy use in patients with hematuria.

Design, Setting, And Participants: The development cohort comprised 1984 patients with hematuria from 40 UK hospitals (DETECT 1; ClinicalTrials.

View Article and Find Full Text PDF