development of the lc-ms/ms method for determining the p-cresol level in plasma

Publication date: Available online 31 January 2019Source: Journal of Pharmaceutical and Biomedical AnalysisAuthor(s): Natalia Korytowska, Aleksandra Wyczałkowska-Tomasik, Agnieszka Wiśniewska, Leszek Pączek, Joanna GiebułtowiczAbstractp-Cresol is a protein-bound uremic retention solute that originates in the intestine through bacterial metabolism and accumulates throughout the body in case of kidney failure. To date, there has been no method to analyze unconjugated p-cresol concentration in the blood with a limit of detection lower than 75 pg. Thus, the aim of this study was to develop and validate a novel liquid chromatography-tandem mass spectrometry method for the determination of unconjugated p-cresol in plasma with a lower detection limit than what has been determined using previously described methods. Sample preparation included derivatization of p-cresol with dansyl chloride (derivatization reagent) showed to be a better approach to analyze the compound. The method optimization involved various pH, time of the reaction, and concentration of derivatization reagent. The validation process was performed according to the procedures prescribed by the European Medicines Agency. All analyzed validation criteria were fulfilled. The novel validated method was applied to compare the level of p-cresol in patients with chronic renal failure before and after dialysis (n = 24). Additionally, the concentration of p-cresol was determined in patients with mult...
Source: Journal of Pharmaceutical and Biomedical Analysis - Category: Drugs & Pharmacology Source Type: research

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Conclusion: In PD patients, expression of peritoneal TJ proteins can be estimated from the dialysis effluent and may be used as novel peritoneal biomarkers. PMID: 31724477 [PubMed - in process]
Source: Renal Failure - Category: Urology & Nephrology Tags: Ren Fail Source Type: research
This study aims to analyze the prevalence and to concentrate on the key risk factors that are responsible for hepatitis B virus (HBV), hepatitis C virus (HCV), and human immunodeficiency virus (HIV) infection in patients on HD visiting two dialysis centers in the city of Quetta in southwestern Pakistan. The overall incidence of HBV was found to be 16.1%, the overall incidence of HCV was found to be 43.2%, and two patients (1.6%) were found to be positive for both HBV and HCV. HIV was not found among patients seen at both hospitals during the study period. The main risk factors for development of a viral infection were the ...
Source: Drug Discoveries and Therapeutics - Category: Drugs & Pharmacology Tags: Drug Discov Ther Source Type: research
Publication date: Available online 14 November 2019Source: Diabetes &Metabolic Syndrome: Clinical Research &ReviewsAuthor(s): S. Gentile, F. Strollo, E. Satta, T. Della-Corte, C. Romano, G. Guarino, Nefrocenter Research Study Group: Nephrologists, Diabetologists, NursesSummaryDiabetes Mellitus (DM) is the most common cause of renal failure and ESRD all over the world, and often requires an individualized insulin treatment regimen. Malnutrition, depression-related eating behavior changes, high on-off-dialysis day-to-day glycemic variability and frequent hypoglycemic events occurring during or immediately after dialy...
Source: Diabetes and Metabolic Syndrome: Clinical Research and Reviews - Category: Endocrinology Source Type: research
We present a female case with congenital cataracts, severe intellectual impairment, sensorineural hearing loss, and renal tubular dysfunction as Lowe syndrome. A 9-year-old Japanese girl visited our hospital due to prolonged proteinuria. Her renal biopsy revealed diffuse mesangium proliferation, sclerosis and dilatation of renal tubules, and mild IgA deposition in the mesangial region. Furthermore, she had congenital cataracts, severe intellectual impairment, and sensorineural hearing loss. Genetic screening did not identify mutations of theORCL gene encoding inositol polyphosphate 5-phosphatase (IPP-5P) (46 XX, female). H...
Source: CEN Case Reports - Category: Urology & Nephrology Source Type: research
Conclusions:Supplementing conventional glucose-based PD solutions with a binder could efficiently increase the removal of PBUTs. This preliminary study suggested that LSPD may be a promising alternative to albumin PD for increasing PBUT removal in the development of next-generation PD solutions for PD patients. PMID: 31690700 [PubMed - in process]
Source: Peritoneal Dialysis International - Category: Urology & Nephrology Tags: Perit Dial Int Source Type: research
2017 ended as a banner year for my family, but things didn’t look great at the start. A death sentence met us in a boxing ring, and we had to school ourselves on fighting to live. I never thought much about the 37 million American adults who suffer from kidney disease until my husband Neil became one of them. Celebrating our first year of marriage in 2001, we learned by accident through an unrelated medical exam that my husband has polycystic kidney disease, an illness which causes the kidneys to fill with cysts over time, rendering the organs unable to function properly. There is no cure. There was nothing to do but...
Source: TIME: Health - Category: Consumer Health News Authors: Tags: Uncategorized health Healthcare medicine public health Source Type: news
Publication date: November 2019Source: The Journal of Foot and Ankle Surgery, Volume 58, Issue 6Author(s): Peter Kaiser, Thomas Vincent Häller, Ilker Uçkay, Dominik Kaiser, Martin Berli, Thomas Böni, Felix WaibelAbstractTotal transmetatarsal amputation (TMA) can be an option for foot salvage in gangrene, sepsis, or infected necrosis. However, the literature concerning predictive outcome factors and bacterial sampling is scarce. To identify potential associations between revision surgery and underlying bacteria or other preoperative selection criteria, we reviewed all patients with TMA who were treated at o...
Source: The Journal of Foot and Ankle Surgery - Category: Orthopaedics Source Type: research
We report a case of a man with ESRF with a delayed diagnosis of dengue viral infection, who admitted at the critical phase of the illness. Despite that, he managed to recover uneventfully with tailored management in his fluid replacement, medication adjustment, and dialysis prescription. Hence, a high index of suspicion is needed when an ESRF patient presents with fever in a dengue-endemic area. A multidisciplinary approach with good collaboration between physician and nephrologist is needed to ensure the best outcome. Renal replacement therapy and medications should be individually tailored according to the patient's clin...
Source: Infectious Diseases in Clinical Practice - Category: Infectious Diseases Tags: Review Articles Source Type: research
Conclusion Patients with ESRF had preserved endothelial-dependent function however compared to controls, demonstrated significantly attenuated microvascular reserve. An impaired response to adenosine may not only represent a component of the pathophysiological milieu in patients with ESRF but may also provide a basis for the suboptimal diagnostic performance of vasodilatory stress in this population.
Source: Coronary Artery Disease - Category: Cardiology Tags: Coronary Artery Disease Source Type: research
Publication date: Available online 28 October 2019Source: Respiratory Medicine Case ReportsAuthor(s): Aayesha J. Soni, Alan PeterAbstractLegionella causes 2–15% of community acquired pneumonia cases that require hospitalization and it is the second most common cause of serious pneumonia that needs admission in an intensive care unit. Since the first published case in 1980, there are a further 22 published case reports on the direct correlation between rhabdomyolysis, renal failure and Legionnaires' disease. All but two patients survived with antibiotics and dialysis. Clinicians should be cognisant of this established...
Source: Respiratory Medicine Case Reports - Category: Respiratory Medicine Source Type: research
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