Publications by authors named "Lennon R"

ACTB encodes β-actin, an abundant cytoskeletal housekeeping protein. In humans, postulated gain-of-function missense mutations cause Baraitser-Winter syndrome (BRWS), characterized by intellectual disability, cortical malformations, coloboma, sensorineural deafness, and typical facial features. To date, the consequences of loss-of-function ACTB mutations have not been proven conclusively.

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Steroid-resistant nephrotic syndrome (SRNS) is a common cause of chronic kidney disease in childhood and has a significant risk of rapid progression to end-stage renal disease. The identification of over 50 monogenic causes of SRNS has revealed dysfunction in podocyte-associated proteins in the pathogenesis of proteinuria, highlighting their essential role in glomerular function. Recent technological advances in high-throughput sequencing have enabled indication-driven genetic panel testing for patients with SRNS.

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Article Synopsis
  • The study explores the effects of darapladib, a drug that inhibits Lp-PLA2, on plaque characteristics in patients with coronary endothelial dysfunction over six months.
  • The research involved 54 patients who were randomized to receive either darapladib or a placebo, with imaging assessments conducted to measure plaque vulnerability.
  • The results indicated no significant changes in plaque progression or vulnerability markers between the darapladib and placebo groups, suggesting that Lp-PLA2 may not directly influence early atherosclerosis in humans.
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Mutations in the NPHS2 gene, encoding podocin, cause hereditary nephrotic syndrome. The most common podocin mutation, R138Q, is associated with early disease onset and rapid progression to end-stage renal disease. Knock-in mice carrying a R140Q mutation, the mouse analogue of human R138Q, show developmental arrest of podocytes and lethal renal failure at neonatal age.

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Background: Participation in cardiac rehabilitation (CR) is an essential component of care for patients with coronary artery disease. However, little is known about its benefit on cardiovascular outcomes in patients with diabetes mellitus (DM) who have undergone percutaneous coronary intervention. The aim of our study was to evaluate the impact of CR in this high-risk group of patients.

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Article Synopsis
  • Researchers created a methodology to systematically review mechanistic studies that link exposure and cancer, addressing gaps in existing methods.
  • A multidisciplinary team held workshops and applied their new framework, which involves identifying mechanisms in a two-stage process.
  • They developed innovative tools, including TeMMPo for mechanism prioritization and the Albatross plot for displaying diverse data, providing guidelines for future research in exposure-disease relationships.
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Aims And Objectives: To explore the experiences of nurse prescribers in an acute service setting.

Design: A descriptive phenomenological design underpinned by Husserl's philosophy was used as the guiding framework.

Methods: Data were collected using semistructured interviews and purposive sampling of 11 current registered nurse prescribers from two acute hospitals.

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Aims/hypothesis: Podocytes are insulin-responsive cells of the glomerular filtration barrier and are key in preventing albuminuria, a hallmark feature of diabetic nephropathy. While there is evidence that a loss of insulin signalling to podocytes is detrimental, the molecular mechanisms underpinning the development of podocyte insulin resistance in diabetes remain unclear. Thus, we aimed to further investigate podocyte insulin responses early in the context of diabetic nephropathy.

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Background: Takotsubo cardiomyopathy (TTC) is a syndrome characterized by transient regional systolic dysfunction of the left ventricle (LV). However, far fewer reports focused on the prevalence of left ventricular diastolic function (DF) and its impact on an adverse prognosis in TTC.

Methods: From January 2005 to October 2014, 205 consecutive TTC patients (mean age, 70±12years; 95% female) were studied.

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Phospholipase A receptor (PLAR) is a member of the mannose receptor family found in podocytes in human kidney. PLAR is the target of the autoimmune disease, membranous nephropathy, characterised by production of anti-PLAR autoantibodies which bind to the podocyte. However the function of PLAR in health and in disease remains unclear.

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Background: Coronary endothelial dysfunction (CED) is an early stage of atherosclerosis and is associated with adverse cardiovascular events. Inflammation may play a role in the development of endothelial dysfunction. To date no study has evaluated the relationship between C-reactive protein and CED.

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Article Synopsis
  • Nephrotic syndrome (NS) occurs when the kidney's filtration barrier is too permeable, leading to significant protein loss in urine and is often linked to immune system issues in children.
  • Glucocorticoid (Gc) therapy, a steroid treatment, is traditionally used for NS, but its exact mechanism and target cells are not well-defined.
  • Recent research shows that Gc acts directly on podocytes to improve their barrier function by regulating certain genes and inhibiting a protein (Rac1) that promotes cell movement, suggesting potential for developing more targeted Gc treatments.
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Acute kidney injury in children is associated with adverse outcomes, although much of our current understanding originates from studies in intensive care units. Holmes et al. used an automated acute kidney injury detection method to obtain epidemiologic data on pediatric acute kidney injury at a national level in outpatient, inpatient, and intensive care unit settings.

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Objectives: Our goal was to compare the rates of in-hospital and 30-day major adverse cardiac and cerebrovascular events (MACCE) including death, stroke, myocardial infarction and repeat revascularization in patients with multivessel disease undergoing multiarterial (MultArt) coronary artery bypass grafting (CABG) with the left internal mammary artery/saphenous vein (LIMA/SV) CABG or percutaneous coronary intervention (PCI).

Methods: From 1 January 1993 to 31 December 2009, 12 615 consecutive patients underwent isolated primary CABG (n = 6667) with LIMA/SV (n = 5712) or MultArt (n = 955) or were treated by PCI (n = 5948) with balloon angioplasty (n = 1020), bare metal stent (n = 3242), and drug-eluting stent (n = 1686). We excluded patients with acute myocardial infarction.

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Background: Digital health interventions (DHI) have been shown to improve intermediates of cardiovascular health, but their impact on cardiovascular (CV) outcomes has not been fully explored. The aim of this study was to determine whether DHI administered during cardiac rehabilitation (CR) would reduce CV-related emergency department (ED) visits and rehospitalizations in patients after percutaneous coronary intervention (PCI) for acute coronary syndrome (ACS).

Methods: We randomized patients undergoing CR following ACS and PCI to standard CR (n=40) or CR+DHI (n=40) for 3 months with 3 patients withdrawing from CR prior to initiation in the treatment arm and 6 in the control group.

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Objectives: To assess coronary revascularization outcomes in patients with previous thoracic radiation therapy (XRT).

Background: Previous chest radiation has been reported to adversely affect long term survival in patients with coronary disease treated with percutaneous coronary interventions (PCI).

Methods: Retrospective, single center cohort study of patients previously treated with thoracic radiation and PCI.

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Purpose: To establish whether the association between milk intake and prostate cancer operates via the insulin-like growth factor (IGF) pathway (including IGF-I, IGF-II, IGFBP-1, IGFBP-2, and IGFBP-3).

Methods: Systematic review, collating data from all relevant studies examining associations of milk with IGF, and those examining associations of IGF with prostate cancer risk and progression. Data were extracted from experimental and observational studies conducted in either humans or animals, and analyzed using meta-analysis where possible, with summary data presented otherwise.

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Understanding how two-dimensional (2D) nanomaterials interact with the biological milieu is fundamental for their development toward biomedical applications. When thin, individualized graphene oxide (GO) sheets were administered intravenously in mice, extensive urinary excretion was observed, indicating rapid transit across the glomerular filtration barrier (GFB). A detailed analysis of kidney function, histopathology, and ultrastructure was performed, along with the in vitro responses of two highly specialized GFB cells (glomerular endothelial cells and podocytes) following exposure to GO.

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Objective: To define the effect of a history of cancer on in-hospital and long-term mortality after primary percutaneous coronary intervention (PCI) for ST-segment elevation myocardial infarction (STEMI).

Patients And Methods: In this retrospective cohort study of 2346 patients with STEMI enrolled in the Mayo Clinic PCI registry from November 1, 2000, through October 31, 2010, we identified 261 patients (11.1%) with a history of cancer.

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Rapamycin, an mTOR inhibitor affects senescence through suppression of senescence-associated secretory phenotype (SASP). We studied the safety and feasibility of low-dose rapamycin and its effect on SASP and frailty in elderly undergoing cardiac rehabilitation (CR). 13 patients; 6 (0.

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Background: There is increasing evidence implying that the early and functionally highly active circulating endothelial progenitor cell (CEPC) phenotype (CD34-/CD133+/KDR+) with osteogenic potential (OCN+) might link between vascular atherosclerotic calcification and mechanisms of bone metabolism. We sought to evaluate the early OCN+ CEPC counts as an independent biomarker for the severity of coronary artery disease (CAD).

Methods: Peripheral blood samples were drawn from 593 patients undergoing clinically indicated coronary angiography.

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Background: Low body mass index (BMI) and serum creatinine are surrogate markers of frailty and sarcopenia. Their relationship with cause-specific mortality in elderly patients undergoing percutaneous coronary intervention is not well studied.

Methods And Results: We determined long-term cardiovascular and noncardiovascular mortality in 9394 consecutive patients aged ≥65 years who underwent percutaneous coronary intervention from 2000 to 2011.

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Glomeruli are highly sophisticated filters and glomerular disease is the leading cause of kidney failure. Morphological change in glomerular podocytes and the underlying basement membrane are frequently observed in disease, irrespective of the underlying molecular etiology. Standard electron microscopy techniques have enabled the identification and classification of glomerular diseases based on two-dimensional information, however complex three-dimensional ultrastructural relationships between cells and their extracellular matrix cannot be easily resolved with this approach.

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It is estimated that in the United States, each year, approximately 620,000 persons will experience an acute coronary syndrome and approximately 70% of these will have non-ST-elevation acute coronary syndrome. Cardiovascular disease still accounts for 1 of every 3 deaths in the United States, and there is an urgent need to improve the prognosis of patients presenting with acute coronary syndrome. Cardiovascular mortality and ischemic complications are common after acute coronary syndrome, and the advent of newer antithrombotic therapies has reduced ischemic complications, but at the expense of greater bleeding.

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