Publications by authors named "Downie M"

Introduction: Carcinoid heart disease (CHD), a complication of carcinoid syndrome (CS), is a rare condition that can lead to right sided valvular heart disease and has been traditionally associated with a poor prognosis. We conducted a systematic review and meta-analysis to explore the accuracy of biomarkers and echocardiography in diagnosing CHD amongst patients who are already known to have neuroendocrine tumours and to assess whether surgical management of CHD leads to a reduction in mortality.

Methods: A systematic literature search of MEDLINE, EMBASE, EBM Reviews, Google Scholar, ClinicalTrials.

View Article and Find Full Text PDF

Class 2 HLA and PLA2R1 alleles are exceptionally strong genetic risk factors for membranous nephropathy (MN), leading, through an unknown mechanism, to a targeted autoimmune response. Introgressed archaic haplotypes (introduced from an archaic human genome into the modern human genome) might influence phenotypes through gene dysregulation. Here, we investigated the genomic region surrounding the PLA2R1 gene.

View Article and Find Full Text PDF

Purpose Of Review: Diabetic kidney disease (DKD) is a leading cause of chronic kidney disease (CKD) for which many treatments exist that have been shown to prevent CKD progression and kidney failure. However, DKD is a complex and heterogeneous etiology of CKD with a spectrum of phenotypes and disease trajectories. In this narrative review, we discuss precision medicine approaches to DKD, including genomics, metabolomics, proteomics, and their potential role in the management of diabetes mellitus and DKD.

View Article and Find Full Text PDF

Introduction: Steroid-sensitive nephrotic syndrome (SSNS) is the most common form of kidney disease in children worldwide. Genome-wide association studies (GWAS) have demonstrated the association of SSNS with genetic variation at and have identified several non- loci that aid in further understanding of disease pathophysiology. We sought to identify additional genetic loci associated with SSNS in children of Sri Lankan and European ancestry.

View Article and Find Full Text PDF

Purpose: LGBTQ + medical trainees experience significant discrimination. These individuals are stigmatized within a hetero- and cis-normative system, resulting in poorer outcomes in mental health and increased stress regarding career trajectory compared with their hetero- and cis-identifying counterparts. However, literature on the barriers experienced during medical training in this marginalized group is limited to small heterogeneous studies.

View Article and Find Full Text PDF

Background: Despite MN being one of the most common causes of nephrotic syndrome worldwide, its biological and environmental determinants are poorly understood in large-part due to it being a rare disease. Making use of the UK Biobank, a unique resource holding a clinical dataset and stored DNA, serum and urine for ~500,000 participants, this study aims to address this gap in understanding.

Methods: The primary outcome was putative MN as defined by ICD-10 codes occurring in the UK Biobank.

View Article and Find Full Text PDF
Article Synopsis
  • Membranous nephropathy (MN) is the main cause of nephrotic syndrome in adults, distinguished by autoantibodies against specific glomerular antigens like PLA2R1 and THSD7A.
  • Researchers genotyped 1,409 MN patients to compare genetic risk factors associated with different autoantibody statuses against a control group.
  • The findings show that patients with anti-PLA2R1 antibodies have a higher genetic risk score (GRS) compared to controls and those with anti-THSD7A antibodies, indicating distinct genetic influences and suggesting some antibody-negative MN cases might still be linked to autoimmunity against PLA2R1.
View Article and Find Full Text PDF

Context: Observational studies investigating the role of vitamin D in renal function have yielded inconsistent results.

Objective: We tested whether 25-hydroxyvitamin D (25[OH]D) serum levels are associated with renal function, and inversely, whether altered renal function causes changes in 25(OH)D, using Mendelian randomization (MR).

Methods: In this two-sample MR study, we used single nucleotide polymorphisms (SNP) associated with 25(OH)D in 443 734 Europeans and evaluated their effects on estimated glomerular filtration rate (eGFR), blood urea nitrogen (BUN), chronic kidney disease (CKD) risk and progression in genome-wide association studies totaling over 1 million Europeans.

View Article and Find Full Text PDF

This article considers mediation as a means of resolving decision-making disputes between clinicians and parents in paediatric end-of-life cases. It examines the legal tests applied in England and Wales and notes the lack of precedent in Scotland. The advantages, disadvantages and the most appropriate style of mediation are analysed.

View Article and Find Full Text PDF

Background: Idiop athic nephrotic syndrome (INS) is classified in children according to response to initial corticosteroid therapy into steroid-sensitive (SSNS) and steroid-resistant nephrotic syndrome (SRNS), and in adults according to histology into minimal change disease (MCD) and focal segmental glomerulosclerosis (FSGS). However, there is well-recognised phenotypic overlap between these entities. Genome-wide association studies (GWAS) have shown a strong association between SSNS and variation at HLA, suggesting an underlying immunological basis.

View Article and Find Full Text PDF

Diabetic ketoacidosis (DKA) accounts for up to a third of all new presentations of Type 1 Diabetes Mellitus (T1DM) in children and adolescents. While most cases are relatively uncomplicated new onset presentations, if DKA is compounded with an additional underlying severe illness, such as appendicitis or severe infection, diagnostic delays may be experienced, and treatment response and outcomes may be compromised. We report an atypical case of new onset diabetes with severe DKA and underlying severe sepsis, which responded poorly to traditional therapy resulting in maximal intensive care management including mechanical ventilation, inotropes, extracorporeal membrane oxygenation (ECMO) for cardiorespiratory support, and kidney replacement therapy.

View Article and Find Full Text PDF

Introduction: Membranous nephropathy (MN) is the most common cause of nephrotic syndrome (NS) in adults and is a leading cause of end-stage renal disease due to glomerulonephritis. Primary MN has a strong male predominance, accounting for approximately 65% of cases; yet, currently associated genetic loci are all located on autosomes. Previous reports of familial MN have suggested the existence of a potential X-linked susceptibility locus.

View Article and Find Full Text PDF

The majority of calcium filtered by the glomerulus is reabsorbed along the nephron. Most is reabsorbed from the proximal tubule (> 60%) via a paracellular pathway composed of the tight junction proteins claudins-2 and -12, a process driven by sodium and consequently water reabsorption. The thick ascending limb reabsorbs the next greatest amount of calcium (20-25%), also by a paracellular pathway composed of claudins-16 and -19.

View Article and Find Full Text PDF

Background: Primary nephrogenic diabetes insipidus (NDI) is a rare disorder and little is known about treatment practices and long-term outcome.

Methods: Paediatric and adult nephrologists contacted through European professional organizations entered data in an online form.

Results: Data were collected on 315 patients (22 countries, male 84%, adults 35%).

View Article and Find Full Text PDF

Steroid-sensitive nephrotic syndrome (SSNS) is the most common form of nephrotic syndrome in childhood and there is growing evidence that genetics play a role in the susceptibility for the disease. Familial clustering has been observed and has led to several studies on familial SSNS trying to identify a monogenic cause of the disease. Until now, however, none of these have provided convincing evidence for Mendelian inheritance.

View Article and Find Full Text PDF

The kidney tubules provide homeostasis by maintaining the external milieu that is critical for proper cellular function. Without homeostasis, there would be no heartbeat, no muscle movement, no thought, sensation, or emotion. The task is achieved by an orchestra of proteins, directly or indirectly involved in the tubular transport of water and solutes.

View Article and Find Full Text PDF

The aerial epidermis of plants plays a major role in environmental interactions, yet the development of the cellular components of the aerial epidermis-trichomes, stomata, and pavement cells-is still not fully understood. We have performed a detailed screen of the leaf epidermis in two generations of the well-established cv M82 × ac. LA716 introgression line (IL) population using a combination of scanning electron microscopy (SEM) techniques.

View Article and Find Full Text PDF

Background: Successful treatments for gestational diabetes mellitus (GDM) have the potential to improve health outcomes for women with GDM and their babies.

Objectives: To provide a comprehensive synthesis of evidence from Cochrane systematic reviews of the benefits and harms associated with interventions for treating GDM on women and their babies.

Methods: We searched the Cochrane Database of Systematic Reviews (5 January 2018) for reviews of treatment/management for women with GDM.

View Article and Find Full Text PDF