Publications by authors named "Tracy Dew"

Objective: Faecal calprotectin (fCAL) is an established marker of intestinal inflammation in inflammatory bowel disease (IBD). Disproportionally high fCAL levels, for the severity of intestinal inflammation, have been previously observed in primary sclerosing cholangitis associated IBD (PSC-IBD). The aim of this study was to test the hypothesis that fCAL is a marker of biliary injury in PSC-IBD.

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Objective: Fractures in Charcot neuro-osteoarthropathy (CN) often fail to heal despite prolonged immobilization with below-knee casting. The aim of the study was to assess the efficacy of recombinant human parathyroid hormone (PTH) in reducing time to resolution of CN and healing of fractures.

Research Design And Methods: People with diabetes and acute (active) Charcot foot were randomized (double-blind) to either full-length PTH (1-84) or placebo therapy, both in addition to below-knee casting and calcium and vitamin D3 supplementation.

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Background: Acute kidney injury (AKI) is a frequent complication of transcatheter aortic valve implantation (TAVI) and has been linked to preexisting comorbidities, peri-procedural hypotension, and systemic inflammation. The extent of systemic inflammation after TAVI is not fully understood. Our aim was to characterize the inflammatory response after TAVI and evaluate its contribution to the mechanism of post-procedural AKI.

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Article Synopsis
  • Advanced liver fibrosis is a serious health risk commonly associated with cirrhosis, and people with severe psoriasis have an elevated risk for liver disease.
  • A study involving 400 adults with severe psoriasis found that 14.1% had advanced liver fibrosis, with key risk factors including central obesity, insulin resistance, and severity of psoriasis.
  • The research highlights the need for ongoing monitoring of liver health in individuals with severe psoriasis, pointing to abdominal obesity and metabolic disturbances as significant contributors to advanced liver fibrosis.
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Introduction: The replacement of 24-h urine collection by protein-creatinine ratio (PCR) for the diagnosis of preeclampsia has been recently recommended. However, the literature is conflicting and there are concerns about the impact of demographic characteristics on the performance of PCR.

Material And Methods: This was an implementation audit of the introduction of PCR in a London Tertiary obstetric unit.

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Aims: Acute graft-versus-host disease (aGVHD) is a leading cause of morbidity and mortality following allogeneic haematopoietic stem cell transplantation (HSCT). The aim of this study was to evaluate the clinical utility of a composite biomarker panel to help identify individuals at risk of developing aGVHD, and to help predict and differentiate between severity of aGVHD following T-cell-depleted allogeneic HSCT.

Methods: We retrospectively analysed our cohort of biopsy confirmed patients with aGVHD, who underwent T-cell-depleted HSCT and matched them with negative controls without any evidence of aGVHD.

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The aim of this study was to investigate the effect of asymptomatic rectal bacterial sexually transmitted infections (STIs) on rectal HIV viral load (VL). A prospective cohort study of HIV-positive men who have sex with men attending a tertiary centre in London, UK, for their routine HIV care was performed. Forty-two HIV-positive men who have sex with men were recruited between January and August 2014.

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Background: The outcomes of intragastric balloon (IGB) placement to achieve weight loss in obese patients with chronic kidney disease (CKD) have not been reported to date. This study aimed to assess the safety and efficacy of the IGB as a weight-loss treatment among this patient population.

Methods: A prospective, single-arm, 'first in CKD' interventional study was conducted in patients with a body mass index >35 kg/m2 and CKD stages 3-4, referred for weight loss.

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Article Synopsis
  • Roux-en-Y gastric bypass surgery leads to significant weight loss and increased bile acid concentrations, which typically help suppress bone resorption markers.
  • Despite improvements in vitamin D levels after surgery, patients experienced an increase in C-terminal telopeptide (a marker for bone resorption), indicating ongoing bone loss.
  • The study suggests that monitoring C-terminal telopeptide levels could be important for assessing bone health risks in individuals post-surgery.
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Background: Anorexia nervosa (AN) is associated with morbid fear of fatness, extreme food restriction and altered self-regulation. Neuroimaging data implicate fronto-striatal circuitry, including the dorsolateral prefrontal cortex (DLPFC).

Methods: In this double-blind parallel group study, we investigated the effects of one session of sham-controlled high-frequency repetitive transcranial magnetic stimulation (rTMS) to the left DLPFC (l-DLPFC) in 60 individuals with AN.

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Glutathione is the major intracellular redox buffer in the liver and is critical for hepatic detoxification of xenobiotics and other environmental toxins. Hepatic glutathione is also a major systemic store for other organs and thus impacts on pathologies such as Alzheimer's disease, Sickle Cell Anaemia and chronic diseases associated with aging. Glutathione levels are determined in part by the availability of cysteine, generated from homocysteine through the transsulfuration pathway.

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Purpose: The purpose of this study was to examine the relationship between metabolic and inflammatory markers in patients with diabetic retinopathy (DR).

Methods: 208 adult patients with type 2 diabetes participated in this study and were categorized into (1) mild nonproliferative diabetic retinopathy (NPDR) without clinically significant macular edema (CSME), (2) NPDR with CSME, (3) proliferative diabetic retinopathy (PDR) without CSME, and (4) PDR with CSME. Variable serum metabolic markers were assessed using immunoassays.

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Background: Cardiovascular disease remains the leading cause of death in kidney transplant recipients. This pilot study examined the potential effect of aerobic training or resistance training on vascular health and indexes of cardiovascular risk in kidney transplant recipients.

Study Design: Single-blind, randomized, controlled, parallel trial.

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Background: Bile acids [BA] are usually reabsorbed by the terminal ileum, but this process is frequently abnormal in Crohn’s disease [CD]. BA malabsorption occurs, and excess colonic BA cause secretory diarrhea. Furthermore, the hormone fibroblast growth factor 19 [FGF19] is synthesized in the ileum in response to BA absorption and regulates BA synthesis.

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Objective: Major depressive disorder has been linked with inflammatory processes, but it is unclear whether individual differences in levels of inflammatory biomarkers could help match patients to treatments that are most likely to be beneficial. The authors tested the hypothesis that C-reactive protein (CRP), a commonly available marker of systemic inflammation, predicts differential response to escitalopram (a serotonin reuptake inhibitor) and nortriptyline (a norepinephrine reuptake inhibitor).

Method: The hypothesis was tested in the Genome-Based Therapeutic Drugs for Depression (GENDEP) study, a multicenter open-label randomized clinical trial.

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Article Synopsis
  • Survivors of critical illness often experience significant skeletal muscle wasting that impacts their overall function, which is the focus of this study.
  • The study involved 63 critically ill patients from two hospitals in England, with data collected on muscle loss through serial ultrasounds and multiple other measurement techniques within the first ten days of ICU admission.
  • Results showed a notable reduction in muscle size, particularly in patients with multiorgan failure, highlighting the importance of understanding protein synthesis and breakdown in managing critical illness recovery.
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Background & Aims: Ammonia is recognized as a toxin central to complications of liver failure. Hyperammonaemia has important clinical consequences, but optimal means to reduce circulating levels are uncertain. In patients with liver disease, continuous renal replacement therapy (CRRT) with haemofiltration (HF) is often required to treat concurrent kidney injury, but its effects upon ammonia levels are poorly characterized.

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Fibroblast growth factor 19 (FGF19) is proposed to be a negative feedback regulator of hepatic bile acid (BA) synthesis. We aimed to clarify the distribution of FGF19 expression in human intestine and to investigate induction in a novel explant system. Ileal and colonic mucosal biopsies were obtained at endoscopy and analyzed for FGF19 transcript expression.

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Objectives: Increased colonic bile acids can cause chronic diarrhea. Bile acid diarrhea (BAD) is treatable by sequestrants, and may be secondary to ileal disease or primary BAD. It is underdiagnosed, partly because the selenium-75-homocholic acid taurine (SeHCAT) retention test is not available in many countries, and is underutilized in others.

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Objective: To investigate early haemodynamic changes after transfemoral transcatheter aortic valve implantation (TAVI) and the relationship with myocardial injury and neurohormonal activation.

Design: Single-centre prospective observational study.

Setting: Tertiary cardiac centre.

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Background: Chronic kidney disease is common in HIV positive patients and renal tubular dysfunction has been reported in those receiving combination antiretroviral therapy (cART). Tenofovir (TFV) in particular has been linked to severe renal tubular disease as well as proximal tubular dysfunction. Markedly elevated urinary concentrations of retinal-binding protein (RBP) have been reported in patients with severe renal tubular disease, and low-molecular-weight proteins (LMWP) such as RBP may be useful in clinical practice to assess renal tubular function in patients receiving TFV.

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Background: Several biomarkers of penetrating infections vs. rejection in liver transplant (LT) have been suggested; however, baseline values in paediatric LT recipients have not been studied.

Aim: We evaluated the baseline concentration of procalcitonin (PCT), C-reactive protein (CRP) and interleukin-6 (IL-6) in a post-LT paediatric group.

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Background/aims: Elevated levels of total homocysteine (tHcy) are associated with an increased risk of many common diseases. Supplementation with folic acid has been shown to significantly reduce tHcy levels. We used the classical twin model to partition the variability in changes in plasma tHcy levels through folic acid supplementation into genetic, environmental, and confounding epidemiological factors.

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