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Unconjugated bilirubin

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https://www.readbyqxmd.com/read/27905522/circulating-cell-free-dna-telomere-length-and-bilirubin-in-the-vienna-active-ageing-study-exploratory-analysis-of-a-randomized-controlled-trial
#1
Anela Tosevska, Bernhard Franzke, Marlene Hofmann, Immina Vierheilig, Barbara Schober-Halper, Stefan Oesen, Oliver Neubauer, Barbara Wessner, Karl-Heinz Wagner
Telomere length (TL) in blood cells is widely used in human studies as a molecular marker of ageing. Circulating cell-free DNA (cfDNA) as well as unconjugated bilirubin (UCB) are dynamic blood constituents whose involvement in age-associated diseases is largely unexplored. To our knowledge, there are no published studies integrating all three parameters, especially in individuals of advanced age. Here we present a secondary analysis from the Vienna Active Aging Study (VAAS), a randomized controlled intervention trial in institutionalized elderly individuals (n = 101)...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27904243/a-systematic-approach-to-patients-with-jaundice
#2
REVIEW
Bilal Gondal, Andrew Aronsohn
Jaundice is a clinical manifestation of disorders of underlying bilirubin metabolism, hepatocellular dysfunction, or biliary obstruction. As clinical presentations of yellowing of eyes or skin can be somewhat nonspecific for the underlying etiology of disease, a stepwise approach to evaluation is necessary for accurate diagnosis and effective treatment plan. In this review, we discuss underlying mechanisms of cholestasis and jaundice as well as laboratory and imaging modalities needed to evaluate a patient presenting with hyperbilirubinemia...
December 2016: Seminars in Interventional Radiology
https://www.readbyqxmd.com/read/27892440/urinary-tract-infection-in-asymptomatic-newborns-with-prolonged-unconjugated-hyperbilirubunemia-a-hospital-based-observational-study-from-western-region-of-nepal
#3
T Malla, B Sathian, K Karmacharya Malla, S Adhikari
Background Urine culture is usually not a part of work-up for neonatal unconjugated hyperbilirubinemia; hence its prevalence remains unknown. Objective This study was done to determine the incidence of urinary tract infection (UTI) in asymptomatic newborns with prolonged unconjugated hyperbilirubinemia and to evaluate which other laboratory parameters are associated with UTIs. Method A prospective observational study where jaundiced newborns otherwise clinically well, were evaluated for UTI. The study was carried out in neonatal intensive care unit of Manipal Teaching Hospital, Pokhara from June 2012 -April 2013...
January 2016: Kathmandu University Medical Journal (KUMJ)
https://www.readbyqxmd.com/read/27830550/gunn-rats-as-a-surrogate-model-for-evaluation-of-hepatocyte-transplantation-based-therapies-of-crigler-najjar-syndrome-type-1
#4
Zsuzsanna Polgar, Yanfeng Li, Xia Li Wang, Chandan Guha, Namita Roy-Chowdhury, Jayanta Roy-Chowdhury
Liver transplantation has been established as a curative therapy for acute and chronic liver failure, as well as liver-based inherited metabolic diseases. Because of the complexity of organ transplantation and the worldwide shortage of donor organs, hepatocyte transplantation is being developed as a bridging therapy until donor organs become available, or for amelioration of inherited liver-based diseases. The Gunn rat is a molecular and metabolic model of Crigler-Najjar syndrome type 1, which is characterized by lifelong unconjugated hyperbilirubinemia due to the lack of uridinediphosphoglucuronate glucuronosyltransferase-1 (UGT1A1)-mediated bilirubin glucuronidation...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27710263/mechanisms-of-hyperbilirubinemia-during-peginterferon-lambda-1a-therapy-for-chronic-hepatitis-c-infection-a-retrospective-investigation
#5
Ricardo Zwirtes, Premkumar Narasimhan, Megan M Wind-Rotolo, Dong Xu, Matthew W Hruska, Narendra Kishnani, Elizabeth M Colston, Subasree Srinivasan
The phase 2b EMERGE study compared the efficacy/safety of peginterferon lambda-1a (Lambda) and peginterferon alfa-2a (Alfa), both with ribavirin (RBV), for treatment of chronic hepatitis C virus (HCV) infection. A key safety finding was a higher frequency of hyperbilirubinemia with Lambda/RBV versus Alfa/RBV. To characterize mechanisms of hyperbilirubinemia associated with Lambda/RBV, we conducted a retrospective analysis of safety data from the HCV genotype 1 and genotype 4 cohort of the EMERGE study. Subjects were randomized to once-weekly Lambda (120/180/240 μg) or Alfa (180 μg), with daily RBV, for 48 weeks...
October 6, 2016: Journal of Interferon & Cytokine Research
https://www.readbyqxmd.com/read/27704083/fiber-enhanced-raman-spectroscopic-analysis-as-a-novel-method-for-diagnosis-and-monitoring-of-diseases-related-to-hyperbilirubinemia-and-hyperbiliverdinemia
#6
Di Yan, Christian Domes, Robert Domes, Timea Frosch, Jürgen Popp, Mathias W Pletz, Torsten Frosch
Fiber enhanced resonance Raman spectroscopy (FERS) is introduced for chemically selective and ultrasensitive analysis of the biomolecules hematin, hemoglobin, biliverdin, and bilirubin. The abilities for analyzing whole intact, oxygenated erythrocytes are proven, demonstrating the potential for the diagnosis of red blood cell related diseases, such as different types of anemia and hemolytic disorders. The optical fiber enables an efficient light-guiding within a miniaturized sample volume of only a few micro-liters and provides a tremendously improved analytical sensitivity (LODs of 0...
October 17, 2016: Analyst
https://www.readbyqxmd.com/read/27664801/is-the-unbound-concentration-of-atazanavir-of-interest-in-therapeutic-drug-monitoring
#7
David Metsu, Patrick Seraissol, Pierre Delobel, Christel Cinq-Frais, Lise Cuzin, Jacques Izopet, Etienne Chatelut, Peggy Gandia
To date, therapeutic drug monitoring (TDM) is carried out with anti-retrovirals and is usually based on total concentrations (Ct). However, for some patients, TDM does not reflect efficacy or the avoidance of toxicity as is the case for atazanavir (ATV), a HIV protease inhibitor. As the unbound concentration (Cu) is the pharmacological active form, the aim of the study was to evaluate the value of Cu and the unbound fraction (fu, fu = Cu / Ct) for the TDM of ATV. The variability of Cu and the corresponding fu of ATV were explored in 43 patients treated with ATV for an average of 13...
September 24, 2016: Fundamental & Clinical Pharmacology
https://www.readbyqxmd.com/read/27664321/polymeric-nanocapsules-as-a-technological-alternative-to-reduce-the-toxicity-caused-by-meloxicam-in-mice
#8
Benonio T Villalba, Francine R Ianiski, Ane G Vogt, Mikaela P Pinz, Angélica S Reis, Rodrigo A Vaucher, Mauro P Soares, Ethel A Wilhelm, Cristiane Luchese
This study determined whether meloxicam in nanocapsules modifies stomach and liver damage caused by free meloxicam in mice. Male Swiss mice were treated with blank nanocapsules or meloxicam in nanocapsules or free meloxicam (10 mg/kg, intragastrically, daily for five days). On the seventh day, blood was collected to determine biochemical markers (glutamic oxaloacetic transaminase, glutamic pyruvic transaminase, total bilirubin, unconjugated bilirubin, albumin and alkaline phosphatase). Stomachs and livers were removed for histological analysis...
November 2016: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/27617068/evaluation-of-serum-zinc-levels-in-hyperbilirubinemic-neonates-before-and-after-phototherapy
#9
Ziba Mosayebi, Maral Rahmani, Shahin Behjati Ardakani, Mahdi Sheikh, Mamak Shariat, Golnaz Rezaeizadeh
BACKGROUND: The existing therapeutic methods for neonatal jaundice are costly, time-consuming and potentially risky. Zinc salts can reduce phototherapy duration by precipitating unconjugated bilirubin in the intestine (bilirubin and zinc can form a complex in physiologic pH); however, zinc toxicity is an issue that must be considered since theoretically bilirubin reduction by phototherapy may increase serum zinc levels, making additional zinc supplementation the potential cause of zinc toxicity...
June 2016: Iranian Journal of Pediatrics
https://www.readbyqxmd.com/read/27614215/direct-bilirubin-in-clinical-practice-interpretation-and-haemolysis-interference-guidance-reassessed
#10
M S Devgun, C Richardson
OBJECTIVE: Diagnosis of hyperbilirubinaemia may rely on direct bilirubin (DBIL) measurement. Specimen suitability for DBIL depends on the degree of haemolysis present and method specifications. Our study reassesses the empiric, syncretised haemolysis guidance for DBIL measurement. METHODS: Diazo and vanadate-oxidation assays for DBIL are compared, using sera from adults and neonates. Subsequent data analyses and statistics guide our conclusions on the clinical utility of haemolysed sera...
December 2016: Clinical Biochemistry
https://www.readbyqxmd.com/read/27610311/relation-between-unconjugated-bilirubin-and-rdw-neutrophil-to-lymphocyte-ratio-platelet-to-lymphocyte-ratio-in-gilbert-s-syndrome
#11
Hakan Sarlak, Erol Arslan, Mustafa Cakar, Mustafa Tanriseven, Salim Ozenc, Muharrem Akhan, Fatih Bulucu
BACKGROUND: Unconjugated bilirubin (UCB) plays a protective role in coronary artery disease. Red cell distribution width (RDW), neutrophil to lymphocyte ratio (NLR) and platelet to lymphocyte ratio (PLR) are inflammatory biomarkers and higher levels are related to atherosclerosis and adverse cardiovascular events. AIM: We aimed to investigate the relation between UCB levels and RDW, NLR, PLR in people with Gilbert's syndrome (GS). MATERIALS AND METHODS: We selected 2166 subjects (1082 with GS and 1084 healthy controls) from a database having 33,695 people...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27578021/bilirubin-induced-er-stress-contributes-to-the-inflammatory-response-and-apoptosis-in-neuronal-cells
#12
Mohammed Qaisiya, Cristina Brischetto, Jana Jašprová, Libor Vitek, Claudio Tiribelli, Cristina Bellarosa
Unconjugated bilirubin (UCB) in newborns may lead to bilirubin neurotoxicity. Few studies investigated the activation of endoplasmic reticulum stress (ER stress) by UCB. We performed an in vitro comparative study using undifferentiated SH-SY5Y, differentiated GI-ME-N neuronal cells and human U87 astrocytoma cells. ER stress and its contribution to inflammation and apoptosis induced by UCB were analyzed. Cytotoxicity, ER stress and inflammation were observed only in neuronal cells, despite intracellular UCB accumulation in all three cell types...
August 30, 2016: Archives of Toxicology
https://www.readbyqxmd.com/read/27539158/autoimmune-hemolytic-anemia-after-nivolumab-treatment-in-hodgkin-lymphoma-responsive-to-immunosuppressive-treatment-a-case-report
#13
Magalie P Tardy, Lauris Gastaud, Annick Boscagli, Frederic Peyrade, Andrea Gallamini, Antoine Thyss
The patients with refractory Hodgkin lymphoma have a poor prognosis. The nivolumab, an IgG4 monoclonal antibody inhibiting the program death 1 pathway has recently demonstrated its efficacy and its safety in patients with heavily pretreated refractory Hodgkin lymphoma. The side effects of this immunotherapy include autoimmune-like syndromes. A 75-year-old woman with no significant comorbidities was treated by nivolumab (3 mg/kg every 2 wk) as a third-line treatment for refractory Hodgkin lymphoma. A clinical response was observed with the first injection of nivolumab, with a reduction in superficial lymph nodes...
August 19, 2016: Hematological Oncology
https://www.readbyqxmd.com/read/27515064/a-novel-perspective-on-the-biology-of-bilirubin-in-health-and-disease
#14
REVIEW
Silvia Gazzin, Libor Vitek, Jon Watchko, Steven M Shapiro, Claudio Tiribelli
Unconjugated bilirubin (UCB) is known to be one of the most potent endogenous antioxidant substances. While hyperbilirubinemia has long been recognized as an ominous sign of liver dysfunction, recent data strongly indicate that mildly elevated bilirubin (BLB) levels can be protective against an array of diseases associated with increased oxidative stress. These clinical observations are supported by new discoveries relating to the role of BLB in immunosuppression and inhibition of protein phosphorylation, resulting in the modulation of intracellular signaling pathways in vascular biology and cancer, among others...
September 2016: Trends in Molecular Medicine
https://www.readbyqxmd.com/read/27511502/management-of-hyperbilirubinemia-in-preterm-infants-in-turkey
#15
Nilüfer Güzoğlu, Ümit Ayşe Tandircioğlu, Didem Aliefendioğlu
BACKGROUND/AIM: Prematurity is a significant risk factor for developing unconjugated hyperbilirubinemia. This study investigated the current approach to managing hyperbilirubinemia in preterm newborns in Turkey. MATERIALS AND METHODS: A study-specific questionnaire on the management of jaundice in preterm infants was sent to 100 level III neonatal intensive care units in Turkey. RESULTS: Responses were obtained from 84 centers from all regions of Turkey...
2016: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/27508136/brainstem-evoked-response-audiometry-bera-in-neonates-with-hyperbillirubinemia
#16
Annanya Soni, Surendra Kumar Kanaujia, Sandeep Kaushik
(1) To study the BERA changes in neonates with unconjugated hyperbilirubinemia. (2) To compare the BERA changes in the neonates with unconjugated hyperbilirubinemia before and after therapy. Thirty consecutive term appropriate for gestational age (AGA) neonates presenting to NICU with total serum bilirubin requiring intervention (using the American Academy of Pediatrics guidelines) were included in the study as cases and thirty normal term AGA neonates with uneventful peri-natal period and a maximum measured serum bilirubin <12 mg/dl in case of term baby were included as controls after obtaining informed consent...
September 2016: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/27367602/association-between-serum-bilirubin-and-acute-intraoperative-hyperglycemia-induced-by-prolonged-intermittent-hepatic-inflow-occlusion-in-living-liver-donors
#17
Sangbin Han, Sang-Man Jin, Justin Sangwook Ko, Young Ri Kim, Mi Sook Gwak, Hee Jeong Son, Jae-Won Joh, Gaab Soo Kim
BACKGROUND: Intermittent hepatic inflow occlusion (IHIO) is associated with acute hyperglycemia during living donor hepatectomy when the ischemia is prolonged. Bilirubin is a potent antioxidant to play an important role for maintaining insulin sensitivity and preventing hyperglycemia. Thus, we aimed to test whether serum bilirubin level is associated with prolonged IHIO-induced intraoperative hyperglycemia. METHODS: Seventy-five living liver donors who underwent a prolonged IHIO with a >30 minute cumulative ischemia were included...
2016: PloS One
https://www.readbyqxmd.com/read/27324682/fluorescent-protein-based-detection-of-unconjugated-bilirubin-in-newborn-serum
#18
Sota Iwatani, Hajime Nakamura, Daisuke Kurokawa, Keiji Yamana, Kosuke Nishida, Sachiyo Fukushima, Tsubasa Koda, Noriyuki Nishimura, Hisahide Nishio, Kazumoto Iijima, Atsushi Miyawaki, Ichiro Morioka
Increased serum levels of unconjugated bilirubin are associated with the development of brain damage in newborns. In current clinical settings, there are no methods for directly determining serum levels of unconjugated bilirubin. UnaG, a fluorescent protein from Japanese eel muscle that specifically binds to unconjugated bilirubin was used in this study. Linear regression analysis was carried out to compare unconjugated bilirubin levels measured by UnaG and conventional bilirubin oxidase methods. Unconjugated bilirubin levels in the serum of newborns who were untreated or treated with phototherapy were compared...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27323053/analysis-of-uridine-diphosphate-glucuronosyl-transferase-1a1-gene-mutations-in-neonates-with-unconjugated-hyperbilirubinemia
#19
X H Guo, Y F Sun, M Cui, J B Wang, S Z Han, J Miao
This study was carried out to analyze uridine diphosphate (UDP)-glucuronosyltransferase 1A1 (UGT1A1) gene mutations in neonates with unconjugated hyperbilirubinemia, from two different ethnic groups. Polymerase chain reaction and gene sequencing were used to analyze the differences in genotypes and allele frequencies of different gene mutations among the ethnic groups; this was followed by checking their correlation with the serum bilirubin level and the occurrence of unconjugated hyperbilirubinemia in neonates...
2016: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/27318112/association-between-the-specific-ugt1a1-promoter-sequence-variant-c-3279t-g-and-unconjugated-neonatal-hyperbilirubinemia
#20
Rania Hosny Tomerak, Nahed Fahmy Helal, Olfat Gameel Shaker, Mohamed Abdelhamid Yousef
We investigated the association between c-3279T>G and unconjugated neonatal hyperbilirubinemia. In all, 141 neonates were recruited; 63 had hyperbilirubinemia necessitating treatment, and 78 with bilirubin < 7 mg/dl served as the control group. The frequency of occurrence of c-3279T > G allele was significantly higher in the hyperbilirubinemic (49.2%) than in the control group (25.6%). The homozygous (p = 0.001, OR = 17.7 and CI = 3.9-79.3) rather than the heterozygous state (p = 0...
June 17, 2016: Journal of Tropical Pediatrics
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