Publications by authors named "Lennon A"

This work describes the design and implementation of optics for EXCLAIM, the EXperiment for Cryogenic Large-Aperture Intensity Mapping. EXCLAIM is a balloon-borne telescope that will measure integrated line emission from carbon monoxide at redshifts z < 1 and ionized carbon ([CII]) at redshifts z = 2.5 - 3.

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  • This study assessed Oral Health Behaviour (OHB) in 2-year-old children using a questionnaire, focusing on factors like health, socioeconomic status, and psychosocial elements.
  • The research included 730 participants and found that overall OHB was good, with a significant percentage eating fruits/vegetables, brushing regularly, and having dental check-ups.
  • Results indicated that single-parent households and parents with mental health issues were linked to lower OHB scores, highlighting the importance of social support and parental health in promoting better oral health habits in children.*
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Crystal structure and morphology dictate the mechanical, thermal, and degradation properties of poly l-lactide (PLLA), the structural polymer of the first clinically approved bioresorbable vascular scaffolds (BVS). New experimental methods are developed to reveal the underlying mechanisms governing structure formation during the crimping step of the BVS manufacturing process. Our research specifically examines the "U-bends" - the region where the curvature is highest and stress is maximised during crimping, which can potentially lead to failure of the device with dramatic consequences on patient life.

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  • Molecular studies indicate that ALT is a crucial prognostic marker for shorter relapse-free survival (RFS) in pancreatic neuroendocrine tumors (PanNETs) and other neoplasms.
  • The development of a new chromogenic ALT assay (ALT-CISH) was initiated to address clinical limitations of the traditional fluorescence in situ hybridization (FISH) method, showing a 100% agreement with FISH results in validating that ALT is present in 31% of primary PanNETs.
  • The study demonstrated that ALT status is significantly associated with poorer RFS in both PanNET and leiomyosarcoma (LMS) patients, with ALT being an independent prognostic factor
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Blood-based tests for multi-cancer early detection (MCED) are being developed to facilitate the detection of various cancer types. The Detecting cancers Earlier Through Elective mutation-based blood Collection and Testing study (DETECT-A) study evaluated an MCED test in 9,911 women, age 65-75, without personal history of cancer. In a analysis, we report on the detection of precancerous neoplasms consequent to MCED testing and follow-up.

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  • - Persistent postconcussion symptoms (PPCS) can negatively impact various aspects of a youth's life, including daily activities, education, and social interactions.
  • - The review aimed to provide occupational therapists with evidence-based interventions for helping youth with PPCS, analyzing studies published between 2013 and 2023 that focused on interventions pertinent to occupational therapy.
  • - Findings indicated that Cognitive Behavioral Therapy (CBT) had strong evidence for improving sleep and educational outcomes, while psychoeducation and active rehabilitation showed moderate effectiveness; however, more research is needed on vision-related interventions, the CO-OP, and music therapy.
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Objectives: The aim of this study was to analyze the precipitation of Cerium(III)nitrate hexahydrate [Ce(NO)] or Samarium(III)nitrate hexahydrate [Sm(NO)] solutions on human enamel with and without a salivary pellicle. Investigated parameters were At%Ce and At%Sm measured using energy dispersive x-ray spectroscopy (EDX) after test solution (two concentrations) application.

Materials And Methods: Precipitation of Ce(NO) and Sm(NO) solutions was examined on human enamel with and without a salivary pellicle.

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  • The study investigates how AI models, specifically explainable boosting machines (EBMs), improve the management of pancreatic cysts by assessing risk levels for malignant transformation compared to standard clinical practices.
  • Two different EBM models were evaluated, with one incorporating clinical features and cyst fluid molecular markers (CFMM), based on a dataset of 850 cases.
  • Results showed that the models provided higher accuracy in guiding patient management decisions, such as monitoring and surgery, and could significantly reduce unnecessary surgeries and improve classification for discharge compared to traditional clinical approaches.
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Solid-state electrochemical energy systems have attracted numerous attentions for their excellent performance, high safety, and low cost. Recently, ice of aqueous electrolytes is reported as a new kind solid-state electrolyte for low-temperature solid-state devices. However, the lack of kinetically favorable electrodes hampers the performance of this new class of icy electrolyte-based solid-state devices at sub-zero temperatures.

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  • Pancreatic ductal adenocarcinoma (PDAC) is a highly fatal cancer with most cases being diagnosed at an advanced stage, and there's no recommended population-wide screening despite some benefits from monitoring high-risk individuals.
  • This study aimed to compare survival rates of patients who detected their PDAC through surveillance with a national database, using data from the Cancer of the Pancreas Screening program and matched SEER patients.
  • Results showed that individuals in the screening group were diagnosed at an earlier stage with smaller tumor sizes compared to the control group, but overall survival benefits remain uncertain and require further investigation.
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Guideline recommended standard of care screening is available for four cancer types; most cancer-related deaths are caused by cancers without standard of care screening. DETECT-A is the first prospective interventional trial evaluating a multi-cancer early detection (MCED) blood test (CancerSEEK) in women without a history of cancer, providing the first opportunity to assess the long-term outcomes of individuals with false-positive (FP) MCED results. This prospective analysis of DETECT-A participants with FP results evaluates the performance of an imaging-based diagnostic workflow and examines cancer risk following a FP result.

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In the US, <20% of cancers are diagnosed by standard-of-care (SoC) screening. Multicancer early detection (MCED) tests offer the opportunity to expand cancer screening. Understanding the characteristics and clinical outcomes of MCED-detected cancers is critical to clarifying MCED tests' potential impact.

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Guideline recommended standard of care (SoC) screening is available for four cancer types; most cancer-related deaths are caused by cancers without SoC screening. DETECT-A is the first prospective interventional trial evaluating an MCED blood test (CancerSEEK) in women without a history of cancer, providing the first opportunity to assess the long-term outcomes of individuals with false positive (FP) MCED results. This prospective analysis of DETECT-A participants with FP results evaluates the performance of an imaging-based diagnostic workflow and examines cancer risk following a FP result.

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Background: Recruiting large cohorts efficiently can speed the translation of findings into care across a range of scientific disciplines and medical specialties. Recruitment can be hampered by factors such as financial barriers, logistical concerns, and lack of resources for patients and clinicians. These and other challenges can lead to underrepresentation in groups such as rural residents and racial and ethnic minorities.

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  • The study explores how levels of the carbohydrate antigen CA19-9 and a related glycan, DUPAN-2, can aid in diagnosing pancreatic cancer, particularly highlighting differences based on genetic variants in fucosyltransferase (FUT) enzymes.
  • It involved analyzing genetic data from 938 individuals to determine how these variants affect serum levels of DUPAN-2 and CA19-9, with findings suggesting improved diagnostic sensitivity for early-stage pancreatic cancer.
  • The conclusion emphasizes the potential of combining genetic testing with tumor markers to enhance diagnostic accuracy for pancreatic cancer, showing promising results when using a combination of FUT, CA19-9, and DUPAN-2 tests.
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We previously described an approach called RealSeqS to evaluate aneuploidy in plasma cell-free DNA through the amplification of ~350,000 repeated elements with a single primer. We hypothesized that an unbiased evaluation of the large amount of sequencing data obtained with RealSeqS might reveal other differences between plasma samples from patients with and without cancer. This hypothesis was tested through the development of a machine learning approach called Alu Profile Learning Using Sequencing (A-PLUS) and its application to 7615 samples from 5178 individuals, 2073 with solid cancer and the remainder without cancer.

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Background: Venous thromboembolism (VTE) remains a significant cause of morbidity and mortality worldwide. Rivaroxaban, a direct oral factor Xa inhibitor, mediates anti-inflammatory and cardiovascular-protective effects besides its well-established anticoagulant properties; yet, these remain poorly characterized. Extracellular vesicles (EVs) are considered proinflammatory messengers regulating a myriad of (patho)physiological processes and may be highly relevant to the pathophysiology of VTE.

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  • The study group revised the 2017 guidelines for managing intraductal papillary mucinous neoplasm (IPMN) of the pancreas, focusing on high-risk features, surveillance strategies, and molecular markers in cyst fluid.* -
  • The updated guidelines now include systematic reviews for evidence-based recommendations, highlighting the importance of imaging findings from endoscopic ultrasound (EUS) and cytological analysis in assessing high-risk cases.* -
  • Key discussions also covered surveillance options for small unchanged BD-IPMNs, high-risk features in resected non-invasive cases, and the role of cyst fluid markers in differentiating IPMNs from other cysts and identifying potential cancers.*
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Background: Main-duct (MD-) and mixed-type (MT-) IPMNs harbor an increased risk of pancreatic cancer and warrant surgical resection. Preoperative endoscopic retrograde cholangiopancreatography (ERCP) and endoscopic ultrasound-guided fine-needle aspiration (EUS-FNA) are important in the diagnosis of IPMNs. The aim of this study was to investigate whether endoscopic procedures manipulating the MD impact postoperative adverse events in patients with MD- and MT-IPMNs.

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Metagenomic next-generation sequencing (mNGS) is an untargeted technique capable of detecting all microbial nucleic acid within a sample. This protocol outlines our wet laboratory method for mNGS of cerebrospinal fluid (CSF) specimens and tissues from sterile sites. We use this method routinely in our clinical service, processing 178 specimens over the past 2.

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Red-fluorescing dentine indicates bacterial contamination [Caries Res 2002; 36: 315-319]. We investigated effect of removal of red fluorescent dentine caries on shear bond strength and fracture mode of 4 adhesive approaches. Sixty-five carious teeth and 50 noncarious controls were distributed into 4 groups: Clearfil™ self-etch (CSE), OptiBond™ FL total etch (OTE), Scotchbond™ Universal total etch (STE) and self-etch (SSE).

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Purpose: CA19-9 synthesis is influenced by common variants in the fucosyltransferase (FUT) enzymes FUT3 and FUT2. We developed a clinical test to detect FUT variants, and evaluated its diagnostic performance for pancreatic ductal adenocarcinoma (PDAC).

Experimental Design: A representative set of controls from the Cancer of the Pancreas Screening study was identified for each FUT functional group.

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A novel method aimed at evaluating the active drag profile during front-crawl swimming is proposed. Fourteen full trials were conducted with each trial using a stationary load cell set-up and a commercial resistance trainer to record the tension force in a rope, caused by an athlete swimming. Seven different stroke cycles in each experiment were identified for resampling time dependent data into position dependent data.

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Background & Aims: Currently, most patients with branch duct intraductal papillary mucinous neoplasms (BD-IPMN) are offered indefinite surveillance, resulting in health care costs with questionable benefits regarding cancer prevention. This study sought to identify patients in whom the risk of cancer is equivalent to an age-matched population, thereby justifying discontinuation of surveillance.

Methods: International multicenter study involving presumed BD-IPMN without worrisome features (WFs) or high-risk stigmata (HRS) at diagnosis who underwent surveillance.

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