Publications by authors named "Alex Mercer"

Key Points: In nephrotic syndrome, diagnosis was associated with kidney failure risk: very high in monogenic cases, substantial in FSGS, and less but not zero in minimal change disease. Early control of proteinuria was associated with lower kidney failure risk, and in FSGS levels <1.5 g/g are associated with good kidney outcomes at 10 years.

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Background: The importance of albuminuria as opposed to proteinuria in predicting kidney outcomes in primary immunoglobulin A nephropathy (IgAN) is not well established.

Methods: From 2010 to 2012, 421 patients with biopsy-proven IgAN have been enrolled into the German Chronic Kidney Disease (GCKD) cohort, a prospective observational cohort study ( = 5217). Adjudicated endpoints include a composite kidney endpoint (CKE) consisting of eGFR decline >40%, eGFR <15 ml/min/1.

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Article Synopsis
  • Focal segmental glomerulosclerosis (FSGS) can progress to kidney failure, and this study investigates its progression in a cohort of German patients with the condition.
  • The research involved 159 patients from the GCKD study, monitoring their kidney function and associated health outcomes over a 6.5-year follow-up.
  • Results showed that higher urinary albumin levels were linked to worse kidney outcomes and cardiovascular events, while higher baseline eGFR was protective, with patients having secondary FSGS declining more rapidly than those with primary FSGS.
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  • The phase 3 DUPLEX trial is testing sparsentan, a new medication for patients with focal segmental glomerulosclerosis (FSGS), focusing on its safety and effectiveness.
  • This global study involves 371 patients aged 8 to 75, comparing sparsentan 800 mg to irbesartan 300 mg, while analyzing their baseline characteristics related to FSGS severity.
  • As the largest interventional study of its kind, DUPLEX aims to provide valuable insights into sparsentan's treatment effects across a diverse, worldwide patient population.
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  • The PROTECT trial, a phase 3 study, evaluated the effectiveness of sparsentan, a dual receptor antagonist, in reducing proteinuria compared to irbesartan in patients with immunoglobulin A nephropathy over 110 weeks.* -
  • A total of 406 patients were randomly assigned to either sparsentan or irbesartan, with the primary goal being the change in proteinuria at 36 weeks and secondary goals related to kidney function and safety over the trial duration.* -
  • The findings from the trial, which included a significant reduction in proteinuria with sparsentan, provide important insights into potential treatment strategies for patients with kidney conditions.*
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  • - A phase 3 trial investigated the long-term effects of sparsentan versus irbesartan in treating focal segmental glomerulosclerosis (FSGS) over 108 weeks, enrolling 371 patients aged 8 to 75.
  • - At 36 weeks, sparsentan showed a significantly higher rate of partial remission of proteinuria (42%) compared to irbesartan (26%), and this positive response continued up to 108 weeks.
  • - However, there were no significant differences in the estimated glomerular filtration rate (eGFR) slopes between the two groups at the final analysis, indicating that while proteinuria improved, kidney function as measured by eGFR remained similar with both treatments. *
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  • Sparsentan is a new type of medication being tested in the ongoing PROTECT trial for adults with IgA nephropathy (IgAN), with potential benefits in reducing inflammation and improving blood flow, without suppressing the immune system.
  • The PROTECT trial is a large, international study comparing the effectiveness and safety of sparsentan against the active drug irbesartan in patients with significant proteinuria who have not found success with previous treatments.
  • Results from 404 enrolled patients showed a mix of demographics and health statuses, which will help understand how sparsentan works across different populations and stages of chronic kidney disease (CKD).
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Background: IgA nephropathy can progress to kidney failure, and risk assessment soon after diagnosis has advantages both for clinical management and the development of new therapeutics. We present relationships among proteinuria, eGFR slope, and lifetime risks for kidney failure.

Methods: The IgA nephropathy cohort (2299 adults and 140 children) of the UK National Registry of Rare Kidney Diseases (RaDaR) was analyzed.

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Background: Sparsentan is a novel, non-immunosuppressive, single-molecule, dual endothelin and angiotensin receptor antagonist being examined in an ongoing phase 3 trial in adults with IgA nephropathy. We report the prespecified interim analysis of the primary proteinuria efficacy endpoint, and safety.

Methods: PROTECT is an international, randomised, double-blind, active-controlled study, being conducted in 134 clinical practice sites in 18 countries.

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Rationale & Objective: An early change in proteinuria is considered a reasonably likely surrogate end point in immunoglobulin A nephropathy (IgAN) and can be used as a basis for accelerated approval of therapies, with verification in a postmarketing confirmatory trial. Glomerular filtration rate (GFR) slope is a recently validated surrogate end point for chronic kidney disease progression and may be considered as the end point used for verification. We undertook a meta-analysis of clinical trials in IgAN to compare treatment effects on change in proteinuria versus change in estimated GFR (eGFR) slope.

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Background: IgA nephropathy is thought to be associated with mucosal immune system dysfunction, which manifests as renal IgA deposition that leads to impairment and end-stage renal disease in 20-40% of patients within 10-20 years. In this trial (NEFIGAN) we aimed to assess safety and efficacy of a novel targeted-release formulation of budesonide (TRF-budesonide), designed to deliver the drug to the distal ileum in patients with IgA nephropathy.

Methods: We did a randomised, double-blind, placebo-controlled phase 2b trial, comprised of 6-month run-in, 9-month treatment, and 3-month follow-up phases at 62 nephrology clinics across ten European countries.

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Background: The role of change in proteinuria as a surrogate end point for randomized trials in immunoglobulin A nephropathy (IgAN) has previously not been thoroughly evaluated.

Study Design: Individual patient-level meta-analysis.

Setting & Population: Individual-patient data for 830 patients from 11 randomized trials evaluating 4 intervention types (renin-angiotensin system [RAS] blockade, fish oil, immunosuppression, and steroids) examining associations between changes in urine protein and clinical end points at the individual and trial levels.

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We investigated the effects of exendin-4 on neural stem/progenitor cells in the subventricular zone of the adult rodent brain and its functional effects in an animal model of Parkinson's disease. Our results showed expression of GLP-1 receptor mRNA or protein in the subventricular zone and cultured neural stem/progenitor cells isolated from this region. In vitro, exendin-4 increased the number of neural stem/progenitor cells, and the number of cells expressing the neuronal markers microtubule-associated protein 2, beta-III-tubulin, and neuron-specific enolase.

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Objectives: This study aimed to ascertain the prevalence of sexual risk behavior among married men and women who had, or had not, lived apart from their spouse as a result of the husbands' work migration.

Methods: A cross-sectional survey was conducted among a random sample of 1,175 married women and 703 married men in 2 rural areas of Bangladesh.

Results: Extramarital sex was reported by 64.

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Neonatal deaths account for about half of all deaths among children under 5 years of age in Bangladesh, making prevention a major priority. This paper reports on a study of neonatal deaths in 12 areas of Bangladesh served by a large NGO programme, which had high coverage of reproductive health outreach services and relatively low neonatal mortality in recent years. The study aimed to identify the main factors associated with neonatal mortality in these areas, with a view to developing appropriate strategies for prevention.

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Article Synopsis
  • The neonatal mortality rate (NMR) in Bangladesh showed no change from 1995-2003 according to official stats, but an NGO’s data indicated a 50% decline between 1996 and 2002.
  • This study aimed to verify neonatal death records for registered births in 2003 and evaluate the actual decline in NMR across areas served by 12 NGOs.
  • By reviewing various records and conducting interviews, researchers found 210 neonatal deaths against 194 reported, leading to a corrected NMR of 19 deaths per 1,000 live births, suggesting a true decline from higher underreported rates in the past.
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Context: In rural Bangladesh, family planning services--previously provided through household visits and satellite clinics--were transferred to static community clinics under the government's sectoral program for 1998-2003, but the next sectoral program reversed the change without a formal evaluation. It is important to assess changes in utilization and coverage to inform further development of the service delivery system.

Methods: Longitudinal data on use of family planning services and contraceptive methods were collected quarterly in 1998-2002 from married women in about 11,000 households in two rural surveillance areas--Abhoynagar and Mirsarai.

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Background: The recently discovered adult neural stem cells, which maintain continuous generation of new neuronal and glial cells throughout adulthood, are a promising and expandable source of cells for use in cell replacement therapies within the central nervous system. These cells could either be induced to proliferate and differentiate endogenously, or expanded and differentiated in culture before being transplanted into the damaged site of the brain. In order to achieve these goals effective strategies to isolate, expand and differentiate neural stem cells into the desired specific phenotypes must be developed.

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Background: Neural stem cells (NSCs) can be isolated from the adult mammalian brain and expanded in culture, in the form of cellular aggregates called neurospheres. Neurospheres provide an in vitro model for studying NSC behaviour and give information on the factors and mechanisms that govern their proliferation and differentiation. They are also a promising source for cell replacement therapies of the central nervous system.

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In recent years, it has become evident that neural stem cells in the adult mammalian brain continuously generate new neurons, mainly in the hippocampus and olfactory bulb. Although different growth factors have been shown to stimulate neurogenesis in the adult brain, very little is known about the role of neuropeptides in this process. Pituitary adenylate cyclase-activating polypeptide (PACAP) is a neuropeptide with pleiotropic effects acting through three receptors to which it has high affinity, namely, PACAP receptor 1 (PAC1), vasoactive intestinal peptide (VIP) receptor 1, and VIP receptor 2.

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