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Unconjugated bilirubin

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
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
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
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...
September 21, 2016: Regulatory Toxicology and Pharmacology: RTP
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
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...
September 7, 2016: Clinical Biochemistry
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
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
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
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
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
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
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
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
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
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
Ping Xu, Zhao-Li Ling, Ji Zhang, Ying Li, Nan Shu, Ze-Yu Zhong, Yang Chen, Xin-Yu Di, Zhong-Jian Wang, Li Liu, Xiao-Dong Liu
AIM: Liver failure is associated with dyshomeostasis of efflux transporters at the blood-brain barrier (BBB), which contributes to hepatic encephalopathy. In this study we examined whether breast cancer resistance protein (BCRP), a major efflux transporter at the BBB, was altered during liver failure in rats. METHODS: Rats underwent bile duct ligation (BDL) surgery, and then were sacrificed after intravenous injection of prazosin on d3, d7 and d14. The brains and blood samples were collected...
August 2016: Acta Pharmacologica Sinica
Qian-Qian Yu, Hong Qiu, Ming-Sheng Zhang, Guang-Yuan Hu, Bo Liu, Liu Huang, Xin Liao, Qian-Xia Li, Zhi-Huan Li, Xiang-Lin Yuan
AIM: To examine the predictive effects of baseline serum bilirubin levels and UDP-glucuronosyltransferase (UGT) 1A1*28 polymorphism on response of colorectal cancer to irinotecan-based chemotherapy. METHODS: The present study was based on a prospective multicenter longitudinal trial of Chinese metastatic colorectal cancer (mCRC) patients treated with irinotecan-based chemotherapy (NCT01282658). Baseline serum bilirubin levels, including total bilirubin (TBil) and unconjugated bilirubin (UBil), were measured, and genotyping of UGT1A1*28 polymorphism was performed...
April 28, 2016: World Journal of Gastroenterology: WJG
Alisha Nitin Chaubal, Ruchir Patel, Dhaval Choksi, Kaivan Shah, Meghraj Ingle, Prabha Sawant
Crigler Najjar syndrome is associated with indirect hyperbilirubinemia due to a deficiency of enzyme Uridine Di Phospho Glucoronosyl Transferase (UDPGT). Presented here is a case of a female in the first trimester of pregnancy, who was diagnosed to have type 2 Crigler Najjar syndrome. We also discuss the management of this rare disease especially in pregnancy. Unconjugated bilirubin can cross the placental barrier causing neurological damage in the newborn. Patient was carefully monitored during pregnancy and treatment with phenobarbitone in low doses was adjusted such that the serum bilirubin levels were below 10 mg/dL...
April 18, 2016: World Journal of Hepatology
Hanan S Sherbiny, Doaa M Youssef, Ahmad S Sherbini, Rabab El-Behedy, Laila M Sherief
BACKGROUND: Special blue fluorescent tubes are recommended by the American Academy of Pediatrics (AAP) as the most effective light source for lowering serum bilirubin. A high-intensity light-emitting diode ('super LED') could render intensive phototherapy more effective than the above conventional methods. This study compared the efficacy and safety of a high-intensity light-emitting diode bed vs conventional intensive phototherapy with triple fluorescent tube units as a rescue treatment for severe unconjugated neonatal hyperbilirubinaemia...
January 6, 2016: Paediatrics and International Child Health
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