622 results match your criteria Crigler-Najjar Syndrome
Drug Metab Dispos 2019 Jan 1;47(1):45-48. Epub 2018 Nov 1.
Department of Pediatrics, Milton S. Hershey Penn State Medical Center, Hershey, Pennsylvania (W.E.); Division of Pharmaceutical Chemistry and Technology, University of Helsinki, Helsinki, Finland (E.J., J.M., M.F.); Pediatric Genomics Discovery Program, Department of Pediatrics, Yale University School of Medicine, New Haven, Connecticut (W.J., A.G.S., M.K., S.A.L.); Departments of Pathology and Cell Biology (A.C.I.) and Surgery (S.J.L.), Columbia University Medical Center, New York, New York; and Department of Pediatrics, University of Rochester Medical Center, Rochester, New York (A.C.)
Uridine diphosphate glucuronosyltransferases (UGTs) are key enzymes responsible for the body's ability to process a variety of endogenous and exogenous compounds. Significant gains in understanding UGT function have come from the analysis of variants seen in patients. We cared for a Sudanese child who showed clinical features of type 1 Crigler-Najjar syndrome (CN-1), namely severe unconjugated hyperbilirubinemia leading to liver transplantation. Read More
JIMD Rep 2018 Oct 12. Epub 2018 Oct 12.
Institute of Liver Disease and Transplantation, Gleneagles Global Health City, Chennai, India.
Purpose: Auxiliary partial orthotopic liver transplantation (APOLT) in metabolic liver disease (MLD) has the advantage of correcting the metabolic defect, preserving the native liver for gene therapy in the future with the possibility of withdrawal of immunosuppression.
Methods: Retrospective analysis of safety and efficacy of APOLT in correcting the underlying defect and its impact on neurological status of children with MLD.
Results: A total of 13 APOLT procedures were performed for MLD during the study period. Read More
BMC Pediatr 2018 Oct 3;18(1):317. Epub 2018 Oct 3.
Scientific Laboratory of Molecular Genetics, Riga Stradiņš University, Dzirciema Street 16, Riga, LV 1007, Latvia.
Background: Inherited unconjugated hyperbilirubinemia is caused by variants in the gene UGT1A1 leading to Gilbert's syndrome and Crigler-Najjar syndrome types I and II. These syndromes are differentiated on the basis of UGT1A1 residual enzymatic activity and its affected bilirubin levels and responsiveness to phenobarbital treatment.
Case Presentation: In this report, we present a boy with Crigler-Najjar syndrome type II with high unconjugated bilirubin levels that decreased after phenobarbital treatment but increased in adolescence. Read More
Stem Cells Dev 2018 Nov 20. Epub 2018 Nov 20.
1 Institute for Stem Cell Research and Regenerative Medicine, Neonatolgy and Pediatric Cardiology, Heinrich Heine University , Düsseldorf, Germany .
Gunn rats bear a mutation within the uridine diphosphate glucuronosyltransferase-1a1 (Ugt1a1) gene resulting in high serum bilirubin levels as seen in Crigler-Najjar syndrome. In this study, the Gunn rat was used as an animal model for heritable liver dysfunction. Induced mesenchymal stem cells (iMSCs) derived from embryonic stem cells (H1) and induced pluripotent stem cells were transplanted into Gunn rats after partial hepatectomy. Read More
J Coll Physicians Surg Pak 2018 Oct;28(10):806-808
Department of Medicine, King Edward Medical University, Lahore, Pakistan.
Crigler-Najjar syndrome type II is caused by mutations in the UGT1A1 gene resulting in severely reduced hepatic activity of UDP-glucoronyltransferase - an enzyme required to convert bilirubin into a more soluble form that can then be removed from the body. Absence or severe deficiency of this enzyme can lead to bilirubin accumulation in the body resulting in yellow skin and eyes (jaundice). The earliest signs of this disease can be apparent in the neonatal period. Read More
Fetal Pediatr Pathol 2018 Sep 27:1-6. Epub 2018 Sep 27.
c Department of Pathology , Baskent University Faculty of Medicine , Ankara , Turkey.
Introduction: Crigler Najjar (CN) disease is a genetic disorder which results in increased unconjugated bilirubin level. Liver parenchyma was previously considered structurally normal. Recent reports describe significant fibrosis in the liver parenchyma of patients with CN syndrome. Read More
Mol Ther Methods Clin Dev 2018 Sep 21;10:237-244. Epub 2018 Jul 21.
Gene Therapy Program, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
Liver metabolism disorders are attractive targets for gene therapy, because low vector doses can reverse the buildup of toxic metabolites in the blood. Crigler-Najjar syndrome is an inherited disorder of bilirubin metabolism that is caused by the absence of uridine diphosphate glucuronosyl transferase 1A1 (UGT1A1) activity. This syndrome is characterized by hyperbilirubinemia and jaundice. Read More
Sci Rep 2018 May 10;8(1):7444. Epub 2018 May 10.
Institute of Medical Biochemistry and Laboratory Diagnostics, 1st Faculty of Medicine, Charles University, Prague, Czech Republic.
Phototherapy was introduced in the early 1950's, and is the primary treatment of severe neonatal jaundice or Crigler-Najjar syndrome. Nevertheless, the potential biological effects of the products generated from the photodegradation of bilirubin during phototherapy remain unknown. This is very relevant in light of recent clinical observations demonstrating that the use of aggressive phototherapy can increase morbidity or even mortality, in extremely low birthweight (ELBW) infants. Read More
J Pediatr Genet 2018 Jun 16;7(2):67-73. Epub 2018 Feb 16.
Pediatric Surgery Unit, Department of Surgery, Prince of Songkla University, Hat Yai, Songkhla, Thailand.
Biliary atresia (BA) is the most severe form of obstructive cholangiopathy occurring in infants. Definitive diagnosis of BA usually relies on operative findings together with supporting pathological patterns found in the extrahepatic bile duct. In infancy, overlapping clinical patterns of cholestasis can be found in other diseases including biliary hypoplasia and progressive familial intrahepatic cholestasis. Read More
CPT Pharmacometrics Syst Pharmacol 2018 Jun 26;7(6):404-412. Epub 2018 Apr 26.
Alexion Pharmaceuticals, Inc., New Haven, Connecticut, USA.
Crigler-Najjar syndrome type 1 (CN1) is an autosomal recessive disease caused by a marked decrease in uridine-diphosphate-glucuronosyltransferase (UGT1A1) enzyme activity. Delivery of hUGT1A1-modRNA (a modified messenger RNA encoding for UGT1A1) as a lipid nanoparticle is anticipated to restore hepatic expression of UGT1A1, allowing normal glucuronidation and clearance of bilirubin in patients. To support translation from preclinical to clinical studies, and first-in-human studies, a quantitative systems pharmacology (QSP) model was developed. Read More
Hum Gene Ther 2018 Jul;29(7):763-770
Gene Therapy Program, Department of Medicine, University of Pennsylvania , Philadelphia, Pennsylvania.
Adeno-associated viral (AAV) vectors can target the liver, making them an attractive platform for gene therapy approaches that require the correction of hepatocytes. Crigler-Najjar syndrome is an autosomal recessive disorder of bilirubin metabolism that occurs when the liver's uridine diphosphate glucuronosyl transferase 1A1 (UGT1A1) enzyme activity is partially or completely absent. This syndrome is characterized by elevated bilirubin levels in the blood. Read More
Hepatol Commun 2017 Oct 10;1(8):792-802. Epub 2017 Aug 10.
Laboratory of Environmental Toxicology, Department of Pharmacology, University of California San Diego, La Jolla, CA.
Neurotoxic bilirubin is solely conjugated by UDP-glucuronosyltransferase (UGT) 1A1. Due to an inadequate function of UGT1A1, human neonates develop mild to severe physiological hyperbilirubinemia. Accumulation of bilirubin in the brain leads to the onset of irreversible brain damage called kernicterus. Read More
Crit Rev Clin Lab Sci 2018 03 1;55(2):129-139. Epub 2018 Feb 1.
b School of Medical Science and Menzies Health Institute Queensland , Griffith University , Gold Coast , Australia.
Hyperbilirubinemia is a well-known condition in the clinical setting; however, the causes of elevated serum bilirubin are diverse, as are the clinical ramifications of this condition. For example, diagnoses of individuals vary depending on whether they exhibit an unconjugated or conjugated hyperbilirubinemia. Diagnoses can include conditions of disordered bilirubin metabolism (Gilbert's, Crigler-Najjar, Rotor, or Dubin-Johnson syndromes) or an acquired disease, including alcoholic/non-alcoholic fatty liver disease, hepatotropic hepatitis, cirrhosis, or hepato-biliary malignancy. Read More
Endocr Metab Immune Disord Drug Targets 2018 ;18(3):201-211
Health Research Institute, Thalassemia and Hemoglobinopathies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
Background: Crigler-Najjar syndrome (CNS, OMIM: 218800) is the paradigm of an inborn error of metabolism and a rare genetic disease with an estimated incidence of 0.6-1.0 per million live births. Read More
J Pediatr Gastroenterol Nutr 2018 Apr;66(4):588-594
Division of Gastroenterology, Hepatology and Nutrition.
Background: Crigler-Najjar syndrome type I (CNI) arises from biallelic variants of UGT1A1 that abrogate uridine diphosphate glucuronosyltransferase (UGT1A1) activity resulting in unconjugated hyperbilirubinemia. Historically, liver parenchyma in CNI was considered structurally and histologically normal. Recent review of CNI liver explants revealed fibrosis. Read More
Medicine (Baltimore) 2017 Nov;96(45):e8620
Department of Pathology, Beijing Ditan Hospital, Capital Medical University, Beijing, People's Republic of China.
Diagnosis of Crigler-Najjar syndrome type II (CNS-II) and Gilbert syndrome (GS) based on the serum bilirubin concentration is difficult, because this parameter can fluctuate under certain conditions. The aim of this study was to explore differences in UGT1A1 gene mutations, which cause both CNS and GS, and pathological changes between CNS-II and GS.Ninety-five Chinese patients with hereditary unconjugated hyperbilirubinemia were enrolled in this study. Read More
Iran J Basic Med Sci 2017 Aug;20(8):880-885
Division of Genetics, Department of Biology, Faculty of Sciences, University of Isfahan, Isfahan, Iran.
Objectives: Mutations in the UGT1A1 gene are responsible for hyperbilirubinemia syndromes including Crigler-Najjar type 1 and 2 and Gilbert syndrome. In view of the genetic heterogeneity and involvement of large numbers of the disease causing mutations, the application of polymorphic markers in the UGTA1 gene could be useful in molecular diagnosis of the disease.
Materials And Methods: In the present study, two polymorphic markers including rs4148326 and rs4124874 in the UGT1A1 gene region were characterized. Read More
J Clin Diagn Res 2017 Jul 1;11(7):OD05-OD06. Epub 2017 Jul 1.
Consultant, Department of Genetic Medicine, Sir Ganga Ram Hospital, New Delhi, India.
Crigler Najjar Syndrome (CNS) Type 2 is an uncommon genetic disorder characterised by non-haemolytic unconjugated hyperbilirubinemia. It is caused by mutations in the UGT1A1 gene which codes for the enzyme uridine diphosphate glucoronosyl transferase- 1, required for the conjugation and further excretion of bilirubin from the body. Affected individuals are usually asymptomatic apart from the jaundice and investigations reveal isolated indirect hyperbilirubinemia. Read More
Gene Ther 2017 10 14;24(10):649-660. Epub 2017 Aug 14.
Mouse Molecular Genetics, Molecular Medicine and Cellular Immunology Groups, International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, Italy.
Adeno-associated virus (AAV) -mediated gene therapy is a promising strategy to treat liver-based monogenic diseases. However, two major obstacles limit its success: first, vector dilution in actively dividing cells, such as hepatocytes in neonates/children, due to the non-integrating nature of the vector; second, development of an immune response against the transgene and/or viral vector. Crigler-Najjar Syndrome Type I is a rare monogenic disease with neonatal onset, caused by mutations in the liver-specific UGT1 gene, with toxic accumulation of unconjugated bilirubin in plasma, tissues and brain. Read More
EMBO Mol Med 2017 10;9(10):1346-1355
International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, Italy
Crigler-Najjar syndrome type I (CNSI) is a rare monogenic disease characterized by severe neonatal unconjugated hyperbilirubinemia with a lifelong risk of neurological damage and death. Liver transplantation is the only curative option, which has several limitations and risks. We applied an gene targeting approach based on the insertion, without the use of nucleases, of a promoterless therapeutic cDNA into the albumin locus of a mouse model reproducing all major features of CNSI Neonatal transduction with the donor vector resulted in the complete rescue from neonatal lethality, with a therapeutic reduction in plasma bilirubin lasting for at least 12 months, the latest time point analyzed. Read More
Pediatr Dev Pathol 2017 Nov-Dec;20(6):522-525. Epub 2017 Mar 14.
1 Department of Pathology, Microbiology & Immunology, Vanderbilt University Medical Center, Nashville, Tennessee.
Crigler-Najjar syndrome is a hereditary unconjugated hyperbilirubinemia. Two forms of the disease are recognized. Type I is more severe and results in kernicterus if left untreated, and Type II is less severe and responds to phenobarbital. Read More
J Neuroinflammation 2017 03 24;14(1):64. Epub 2017 Mar 24.
International Centre for Genetic Engineering and Biotechnology (ICGEB), Padriciano, 99, 34149, Trieste, Italy.
Background: Severe hyperbilirubinemia is toxic during central nervous system development. Prolonged and uncontrolled high levels of unconjugated bilirubin lead to bilirubin-induced neurological damage and eventually death by kernicterus. Bilirubin neurotoxicity is characterized by a wide array of neurological deficits, including irreversible abnormalities in motor, sensitive and cognitive functions, due to bilirubin accumulation in the brain. Read More
Pharmgenomics Pers Med 2017 28;10:61-68. Epub 2017 Feb 28.
Department of Obstetrics and Gynecology, Iwate Medical University, Morioka, Iwate, Japan.
Mutations in the gene have been implicated in Gilbert syndrome, which shows mild hyperbilirubinemia, and a more aggressive childhood subtype, Crigler-Najjar syndrome. To date, more than 100 variants have been found in the gene. Among them, and have been reported to be associated with severe toxicities in patients treated with irinotecan-based chemotherapy by increasing the dose of SN-38 (7-ethyl-10-hydroxycamptothecin), an active form of irinotecan. Read More
Exp Clin Transplant 2017 Feb;15(Suppl 1):128-132
Department of General Surgery, Baskent University, Ankara, Turkey.
Objectives: This study sought to evaluate the efficacy of liver transplant for unusual liver diseases.
Materials And Methods: The results of 476 patients who underwent liver transplant from 1988 to January 2015 were retrospectively analyzed. Two hundred forty-five of them were adult patients and 231 of them were pediatric. Read More
Endocr Regul 2017 Jan;51(1):31-34
Objective: Melatonin is a hormone predominantly synthesized and secreted during the night by the pineal gland. Artificial light at night, especially its blue part, acutely suppresses the melatonin production. Th e aim of the present study was to find out, whether an intense blue light phototherapy of severe hyperbilirubinemia, may suppress the melatonin production during the night when the eyes will be properly protected by a sleep mask. Read More
Mol Diagn Ther 2017 06;21(3):327-335
Department of Laboratory Medicine and Pathology, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA.
Background: Neonatal hyperbilirubinemia can be severe or prolonged and warrant exploration into the underlying etiology, which may include genetic assessment of UGT1A1 for inherited disorders (i.e. Crigler-Najjar syndrome or Gilbert syndrome). Read More
Forensic Sci Med Pathol 2017 Mar 14;13(1):82-85. Epub 2017 Jan 14.
Victorian Institute of Forensic Medicine, 65 Kavanagh Street, Southbank, Victoria, 3006, Australia.
We present the case of a 25 year old woman with a complex past medical history including Crigler-Najjar syndrome (Type 1) with a liver transplant in 1993 and subsequent development of cirrhosis with portal hypertension in the transplanted liver. The deceased presented to hospital with hematemesis and investigations showed a large gastric varix. The varix was injected with cyanoacrylate glue. Read More
Zhonghua Gan Zang Bing Za Zhi 2016 Nov;24(11):863-866
Department of Pathology, Beijing Ditan Hospital, Capital Medical University, Beijing 100015, China.
Methods Mol Biol 2017 ;1506:131-147
Division of Gastroenterology and Liver Diseases, Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA.
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. Read More
Exp Clin Transplant 2018 Jun 20;16(3):352-354. Epub 2016 Oct 20.
>From the Department of Pediatric Hematology and Oncology, Shiraz University of Medical Sciences, Shiraz, Iran.
Rigler sign is a double wall sign suggesting pneumoperitoneum and intestinal perforation, and it needs emergency surgical treatment. Early diagnosis of intestinal perforation by clinical symptoms, presence of Rigler sign in abdominal radiography, and then early surgical treatment can reduce mortality. Here, we report a patient with Crigler-Najjar syndrome who underwent liver transplant and then developed posttransplant lymphoproliferative disease and received chemotherapy with cyclophosphamide, doxorubicin, vincristine, and prednisone plus rituximab. Read More
Mol Ther Methods Clin Dev 2016 20;3:16049. Epub 2016 Jul 20.
Genethon, Evry, France; Universite' Pierre et Marie Curie - Paris 6, Paris, France; INSERM U951, Evry, France.
Crigler-Najjar syndrome is a severe metabolic disease of the liver due to a reduced activity of the UDP Glucuronosyltransferase 1A1 (UGT1A1) enzyme. In an effort to translate to the clinic an adeno-associated virus vector mediated liver gene transfer approach to treat Crigler-Najjar syndrome, we developed and optimized a vector expressing the UGT1A1 transgene. For this purpose, we designed and tested and multiple codon-optimized UGT1A1 transgene cDNAs. Read More
Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2016 Jun;33(3):328-31
Neonatal Department, Hunan Children's Hospital, Changsha, Hunan 410007, China.
Objective: To detect potential mutation of the UGT1A1 gene in a child affected with Crigler-Najjar syndrome type II.
Methods: Blood samples were collected from the patient and his parents for the extraction of genomic DNA. Potential mutation of the UGT1A1 gene was detected with polymerase chain reaction (PCR) and direct sequencing. Read More
An Pediatr (Barc) 2016 Aug 28;85(2):115-116. Epub 2016 Apr 28.
Servicio de Pediatría, Hospital de Poniente, El Ejido, Almería, España.
World J Hepatol 2016 Apr;8(11):530-2
Alisha Nitin Chaubal, Ruchir Patel, Dhaval Choksi, Kaivan Shah, Meghraj Ingle, Prabha Sawant, Department of Gastroenterology, LTMG Hospital, Mumbai 400022, India.
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. Read More
BMC Gastroenterol 2016 Mar 11;16:33. Epub 2016 Mar 11.
Serviço de Gastrenterologia e Hepatologia, Hospital de Santa Maria, Centro Hospitalar Lisboa Norte, Avenida Professor Egas Moniz, Lisboa, 1649-035, Portugal.
Background: Crigler-Najjar syndrome (CN) is a very rare genetic disorder characterized by an inability to conjugate bilirubin. Contrary to CN type I, patients with CN II exhibit residual capacity to conjugate bilirubin and may present a normal life expectancy.
Case Presentation: We report an unusual late diagnosis of CN type II in an 80-year-old female admitted with severe acute cholangitis. Read More
J Gastrointestin Liver Dis 2015 Dec;24(4):523-6
Division of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
Background: Crigler-Najjar syndrome type I (CN-1) and type II (CN-2) are rare hereditary unconjugated hyperbilirubinemia disorders. However, there have been no reports regarding the co-existence of CN-1 and CN-2 in one family. We experienced a case of an Iranian family that included members with either CN-1 or CN-2. Read More
Br J Clin Pharmacol 2016 May 7;81(5):1002-4. Epub 2016 Mar 7.
Division of Clinical Pharmacology & Toxicology, University Hospital Basel and Department of Biomedicine, University of Basel, Switzerland.
Aims: Crigler-Najjar syndrome (CN) type II is a congenital disease with unconjugated hyperbilirubinemia due to a deficiency of uridine 5'-diphospho-glucuronosyltransferase 1A1. Since the currently proposed treatment with phenobarbital is associated with adverse reactions, we investigated the effect of hypericum extract.
Methods: Repetitive determination of total serum bilirubin in a female with CN type II before, during and after daily treatment with 900 mg hypericum extract on two occasions for 8 weeks. Read More
Mol Med Rep 2016 Feb 10;13(2):1135-40. Epub 2015 Dec 10.
Department of Medical Genetics, Capital Institute of Pediatrics, Beijing 100020, P.R. China.
X-linked ichthyosis (XLI) is an X-linked recessive skin disorder generally restricted to males, which arises from mutations in the steroid sulfatase (STS) gene located on Xp22.3. Crigler-Najjar syndrome (CN-I) is a rare autosomal recessive disease caused by the homozygous or compound heterozygous mutations in the UPD‑glucuronosyltransferase 1 family, polypeptide A1 (UGT1A1) gene on chromosome 2q37. Read More
Tidsskr Nor Laegeforen 2015 Dec 15;135(23-24):2167-70. Epub 2015 Dec 15.
Barne- og ungdomsklinikken Akershus universitetssykehus.
We describe an infant who was readmitted from home at 14 days of age with jaundice and a history of apnoea and episodes of retrocollis/opisthotonos. He had been only mildly jaundiced on discharge from the maternity clinic at 2 days of age. The total serum bilirubin (TSB) on admission was 542 µmol/L, and the infant was treated intensively with triple phototherapy and exchange transfusion. Read More
Pediatr Res 2016 Mar 23;79(3):378-86. Epub 2015 Nov 23.
Department of Pharmacology and Toxicology, Rutgers University, Piscataway, New Jersey.
Inherited disorders of hyperbilirubinemia may be caused by increased bilirubin production or decreased bilirubin clearance. Reduced hepatic bilirubin clearance can be due to defective (i) unconjugated bilirubin uptake and intrahepatic storage, (ii) conjugation of glucuronic acid to bilirubin (e.g. Read More
Am J Transplant 2016 Mar 2;16(3):1021-30. Epub 2015 Nov 2.
Department of Clinical Science, Intervention and Technology (CLINTEC), Division of Transplantation Surgery, Karolinska Institute, Karolinska University Hospital Huddinge, Stockholm, Sweden.
Clinical hepatocyte transplantation is hampered by low engraftment rates and gradual loss of function resulting in incomplete correction of the underlying disease. Preconditioning with partial hepatectomy improves engraftment in animal studies. Our aim was to study safety and efficacy of partial hepatectomy preconditioning in clinical hepatocyte transplantation. Read More
Am J Ther 2017 Nov/Dec;24(6):e653-e658
1Department of Internal Medicine, Westchester Medical Center, New York Medical College, Valhalla, NY; 2Department of Medicine, Sinai Hospital of Baltimore, Johns Hopkins University, Baltimore, MD; 3Department of Medicine, Englewood Hospital and Medical Center, Mount Sinai School of Medicine, Englewood, NJ; 4Government Medical College, Amritsar, India; and 5Department of Medicine, Division of Gastroenterology and Hepatobiliary Disease, New York Medical College, Westchester Medical Center, Valhalla, NY.
We aimed to determine the predictors of coronary artery disease (CAD) in patients with abnormal bilirubin excretion, that is, Gilbert syndrome, Crigler-Najjar syndrome, Dubin-Johnson syndrome, and Rotor syndrome. We analyzed data from the Healthcare Cost and Utilization Project (HCUP) of the Agency for Healthcare Research and Quality, Rockville, MD for the period 2009 to 2010. All patients ≥18 years of age with a primary diagnosis of "disorders of bilirubin excretion" [International Classification of Diseases, Ninth Edition, Clinical Modification (ICD-9CM) code 277. Read More
Hum Mutat 2015 Dec 5;36(12):1215-25. Epub 2015 Oct 5.
UCIBIO/REQUIMTE, Laboratório de Bioquímica, Departamento de Ciências Biológicas, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal.
Variations in the gene encoding uridine diphosphate glucuronosyltransferase 1A1 (UGT1A1) are particularly important because they have been associated with hyperbilirubinemia in Gilbert's and Crigler-Najjar syndromes as well as with changes in drug metabolism. Several variants associated with these phenotypes are nonsynonymous single-nucleotide polymorphisms (nsSNPs). Bioinformatics approaches have gained increasing importance in predicting the functional significance of these variants. Read More
J Gastroenterol Hepatol 2016 Feb;31(2):403-8
Department of Pediatrics, Shiga University of Medical Science, Otsu, Shiga, Japan.
Background And Aims: Hereditary unconjugated hyperbilirubinemias, Crigler-Najjar syndrome type I, Crigler-Najjar syndrome type II (CN-2), and Gilbert syndrome (GS) all result from mutations of the bilirubin uridine 5'-diphosphate (UDP)-glucuronosyltransferase gene (UGT1A1). Often, to distinguish between CN-2 and GS is difficult because the borderline of the two syndromes is unclear. We analyzed the genotypes and phenotypes of 163 Japanese patients with CN-2 or GS. Read More
J Hepatol 2015 Dec 26;63(6):1525-9. Epub 2015 Jul 26.
Department of Gastroenterology and Hepatology and Tytgat Institute for Liver and Intestinal Research, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands. Electronic address:
Crigler-Najjar syndrome presents as severe unconjugated hyperbilirubinemia and is characteristically caused by a mutation in the UGT1A1 gene, encoding the enzyme responsible for bilirubin glucuronidation. Here we present a patient with Crigler-Najjar syndrome with a completely normal UGT1A1 coding region. Instead, a homozygous 3 nucleotide insertion in the UGT1A1 promoter was identified that interrupts the HNF1α binding site. Read More
Stem Cell Reports 2015 Jul 11;5(1):22-30. Epub 2015 Jun 11.
Department of Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA; Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA; Department of Genetics, Albert Einstein College of Medicine, Bronx, NY 10461, USA. Electronic address:
Hepatocyte transplantation has the potential to cure inherited liver diseases, but its application is impeded by a scarcity of donor livers. Therefore, we explored whether transplantation of hepatocyte-like cells (iHeps) differentiated from human induced pluripotent stem cells (iPSCs) could ameliorate inherited liver diseases. iPSCs reprogrammed from human skin fibroblasts were differentiated to iHeps, which were transplanted into livers of uridinediphosphoglucuronate glucuronosyltransferase-1 (UGT1A1)-deficient Gunn rats, a model of Crigler-Najjar syndrome 1 (CN1), where elevated unconjugated bilirubin causes brain injury and death. Read More
PLoS One 2015 20;10(5):e0126263. Epub 2015 May 20.
Department of Infectious Diseases, Southwest Hospital, Third Military Medical University, Chongqing, China; The Chongqing Key Laboratory for Research of Infectious Diseases, Chongqing, China.
Crigler-Najjar Syndrome type II (CNS-II) is an autosomal recessive hereditary condition of unconjugated hyperbilirubinemia without hemolysis, with bilirubin levels ranging from 102.6 μmol/L to 342 μmol/L. CNS-II is caused by a deficiency of UDP-glucuronyl transferase (UGT), which is encoded by the UDP-glucuronyl transferase 1A1 gene (UGT1A1). Read More
Genet Mol Res 2015 Apr 13;14(2):3293-9. Epub 2015 Apr 13.
Center of Excellence in Clinical Virology, Department of Pediatrics, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
Mutations in the UGT1A1 gene cause Crigler-Najjar syndrome (CN), which causes non-hemolytic unconjugated hyperbilirubinemia, and is categorized as CN1 and CN2 according to the severity of bilirubin levels. The UGT1A1 gene is responsible for encoding the liver enzyme uridine diphosphate-glucuronosyltransferase, UGT1A1. This protein adds glucuronic acid to unconjugated bilirubin in bilirubin metabolism to form conjugated bilirubin. Read More
Pediatr Blood Cancer 2015 Sep 27;62(9):1680-1. Epub 2015 Mar 27.
Department of Laboratory Medicine, Laboratory of Clinical Molecular and Personalized Diagnostics, Roma, Italy.
Liver Transpl 2015 Jun;21(6):801-11
Unidad de Hepatología Experimental, Instituto de Investigación Sanitaria La Fe, Valencia, Spain.
Crigler-Najjar type 1 disease is a rare inherited metabolic disease characterized by high levels of unconjugated bilirubin due to the complete absence of hepatic uridine diphosphoglucuronate-glucuronosyltransferase activity. Hepatocyte transplantation (HT) has been proposed as an alternative treatment for Crigler-Najjar syndrome, but it is still limited by the quality and the low engraftment and repopulation ability of the cells used. Because of their attachment capability and expression of adhesion molecules as well as the higher proportion of hepatic progenitor cells, neonatal hepatocytes may have an advantage over adult cells. Read More