1
|
Zheng Y, Rao Q, Han Y, He J. A novel heterozygous deletion in ABCB4 gene in a Chinese family with intrahepatic cholestasis of pregnancy, neonatal hyperbilirubinemia, and cholelithiasis: Case reports and literature review. Mol Genet Genomic Med 2024; 12:e2291. [PMID: 37787087 PMCID: PMC10767586 DOI: 10.1002/mgg3.2291] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 08/31/2023] [Accepted: 09/19/2023] [Indexed: 10/04/2023] Open
Abstract
BACKGROUND ABCB4 gene (OMIM *171060) variant is associated with a wide clinical spectrum of hepatobiliary diseases, including familial intrahepatic cholestasis of pregnancy (ICP), progressive familial intrahepatic cholestasis type 3 (PFIC3), and neonatal hyperbilirubinemia due to impaired protection of the bile duct. The majority of reported cases, however, were missense or nonsense variants, with few deletion variant findings in the Chinese population. METHOD We performed whole genome sequencing and confirmed it with Sanger sequencing of the proband infant and his families. Clinical courses and laboratory results were documented and collected from the proband infant and his mother. We also reviewed other published cases related to genetic variants in ABCB4 in the Chinese population. RESULTS A 26-year-old Chinese female (II.2) who had recurrent intrahepatic cholestasis of pregnancy and her 49-day-old son (III.4) who had hyperbilirubinemia, both presented with extremely elevated total bile acid, cholestatic dominant pattern liver function abnormalities. They were able to stay relatively stable with mild pruritus on ursodeoxycholic acid treatment. After ruling out other possibilities, genetic sequencing revealed a diagnosis of heterozygous deletion variant NM_018849.3:c.1452_1454del (NP_061337.1:p.Thr485del) in ABCB4, which was not reported before, in the symptomatic mother (II.2), index patient (III.4), and the symptomatic grandmother (I.2). This variant resulted in clinical spectrums of ICP, neonatal hyperbilirubinemia, and cholelithiasis in our pedigree. CONCLUSION We reported a novel heterozygous deletion variant of the ABCB4 gene in a Chinese family, as well as a literature review of ABCB4-related disorders. We aim to facilitate healthcare professionals to better understand genetic factors as an uncommon cause of hepatobiliary diseases, as well as improve therapeutic strategies in challenging clinical situations such as pregnancy and neonatal care.
Collapse
Affiliation(s)
- Yang Zheng
- Department of General Practice, The First Affiliated Hospital, School of MedicineZhejiang UniversityHangzhouChina
| | - Qunfang Rao
- Department of Infectious Diseases, The First Affiliated HospitalNanchang UniversityNanchangChina
| | - Yiru Han
- Department of Health Care, The First Affiliated Hospital, School of MedicineZhejiang UniversityHangzhouChina
| | - Jianqin He
- Department of Health Care, The First Affiliated Hospital, School of MedicineZhejiang UniversityHangzhouChina
- Department of Infectious Diseases, The First Affiliated Hospital, School of MedicineZhejiang UniversityHangzhouChina
| |
Collapse
|
2
|
Cheng K, Rosenthal P. Diagnosis and management of Alagille and progressive familial intrahepatic cholestasis. Hepatol Commun 2023; 7:e0314. [PMID: 38055640 PMCID: PMC10984671 DOI: 10.1097/hc9.0000000000000314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 09/12/2023] [Indexed: 12/08/2023] Open
Abstract
Alagille syndrome and progressive familial intrahepatic cholestasis are conditions that can affect multiple organs. Advancements in molecular testing have aided in the diagnosis of both. The impairment of normal bile flow and secretion leads to the various hepatic manifestations of these diseases. Medical management of Alagille syndrome and progressive familial intrahepatic cholestasis remains mostly targeted on supportive care focusing on quality of life, cholestasis, and fat-soluble vitamin deficiency. The most difficult therapeutic issue is typically related to pruritus, which can be managed by various medications such as ursodeoxycholic acid, rifampin, cholestyramine, and antihistamines. Surgical operations were previously used to disrupt enterohepatic recirculation, but recent medical advancements in the use of ileal bile acid transport inhibitors have shown great efficacy for the treatment of pruritus in both Alagille syndrome and progressive familial intrahepatic cholestasis.
Collapse
Affiliation(s)
- Katherine Cheng
- Department of Pediatrics Gastroenterology, Hepatology and Nutrition, University of California San Francisco, San Francisco, California, USA
| | - Philip Rosenthal
- Department of Pediatrics Gastroenterology, Hepatology and Nutrition, University of California San Francisco, San Francisco, California, USA
- Department of Surgery, University of California, San Francisco, San Francisco, California, USA
| |
Collapse
|
3
|
Qiao F, Ren F, Lu W, Yang H, Mo G, Wang S, Liu L, Xu X. A female of progressive familial intrahepatic cholestasis type 3 caused by heterozygous mutations of ABCB4 gene and her cirrhosis improved after treatment of ursodeoxycholic acid: a case report. BMC Med Genomics 2023; 16:171. [PMID: 37488596 PMCID: PMC10367406 DOI: 10.1186/s12920-023-01602-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 07/04/2023] [Indexed: 07/26/2023] Open
Abstract
BACKGROUND Progressive familial intrahepatic cholestasis (PFIC) is a group of rapidly progressive autosomal recessive disorders characterized by intrahepatic cholestasis. PFIC-3 is caused by mutations in the ATP-binding cassette subfamily B member 4 gene (ABCB4), which encodes multidrug resistance protein 3 (MDR3/ABCB4). Patients are usually in infancy or childhood, but cirrhosis and portal hypertension may be the first manifestation in older children or young adults. CASE PRESENTATION A 25-year-old young woman with recurrent abnormal hepatic function was mainly characterized by increased gamma glutamyl transpeptidase (GGT) and bile acid with cryptogenic cirrhosis. After 7 months of treatment with ursodeoxycholic acid (UDCA), her hepatic pathology suggested there were also obvious widening and venous fibrosis around the portal vein, and slight bile duct hyperplasia at the edge of the portal area. Infiltration of inflammatory cells around the portal vein and hepatocyte ABCB4/MDR3 protein was basically normal. Sequencing indicated the patient had heterozygous mutations in the ABCB4 gene: c.2696C > G and wes [hg19]7q21.12(87032513-87033422) × 1. Through SWISS-MODEL Predict for protein structures, the missense mutation results in protein side chain missing a methyl group (-CH3), and the deletion mutation results in the serious damage to the structure of MDR3 protein which lead to phosphatidylcholine deficiency of bile in the capillary bile ducts. The toxic effect of bile salts then damages the bile ducts, causing cholestasis and cholangitis, which can then develop into biliary cirrhosis. Through the analysis of pathogenicity prediction software, the mutations led to PFIC3. After treatment of UDCA for 29 months, her cirrhosis was improved, hepatic function was close to normal. CONCLUSION Novel heterozygous mutations are the molecular pathological cause of PFIC3 in this patient. All young adult patients with occult cirrhosis should be tested for ABCB4. Early diagnosis of PFIC3 and continued treatment with UDCA are key to improving prognosis and delaying the onset of end-stage liver disease.
Collapse
Affiliation(s)
- Fei Qiao
- Department of Hepatology, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Feng Ren
- First Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, China
| | - Weiting Lu
- Department of Hepatology, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Haoran Yang
- First Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, China
| | - Guiling Mo
- Medical Laboratory Science, Guangzhou KingMed Center For Clinical Laboratory Co, Ltd, Guangzhou, China
| | - Shuangshuang Wang
- Department of Pathology, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Lina Liu
- Department of Hepatology, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China.
- College of Traditional Chinese Medicine and Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China.
| | - Xiangtao Xu
- Department of Hepatology, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China.
| |
Collapse
|
4
|
Wang HH, Portincasa P, Liu M, Wang DQH. Genetic Analysis of ABCB4 Mutations and Variants Related to the Pathogenesis and Pathophysiology of Low Phospholipid-Associated Cholelithiasis. Genes (Basel) 2022; 13:1047. [PMID: 35741809 PMCID: PMC9222727 DOI: 10.3390/genes13061047] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 06/08/2022] [Indexed: 12/28/2022] Open
Abstract
Clinical studies have revealed that the ABCB4 gene encodes the phospholipid transporter on the canalicular membrane of hepatocytes, and its mutations and variants are the genetic basis of low phospholipid-associated cholelithiasis (LPAC), a rare type of gallstone disease caused by a single-gene mutation or variation. The main features of LPAC include a reduction or deficiency of phospholipids in bile, symptomatic cholelithiasis at <40 years of age, intrahepatic sludge and microlithiasis, mild chronic cholestasis, a high cholesterol/phospholipid ratio in bile, and recurrence of biliary symptoms after cholecystectomy. Needle-like cholesterol crystals, putatively “anhydrous” cholesterol crystallization at low phospholipid concentrations in model and native bile, are characterized in ABCB4 knockout mice, a unique animal model for LPAC. Gallbladder bile with only trace amounts of phospholipids in these mice is supersaturated with cholesterol, with lipid composition plotting in the left two-phase zone of the ternary phase diagram, consistent with “anhydrous” cholesterol crystallization. In this review, we summarize the molecular biology and physiological functions of ABCB4 and comprehensively discuss the latest advances in the genetic analysis of ABCB4 mutations and variations and their roles in the pathogenesis and pathophysiology of LPAC in humans, based on the results from clinical studies and mouse experiments. To date, approximately 158 distinct LPAC-causing ABCB4 mutations and variants in humans have been reported in the literature, indicating that it is a monogenic risk factor for LPAC. The elucidation of the ABCB4 function in the liver, the identification of ABCB4 mutations and variants in LPAC patients, and the exploration of gene therapy for ABCB4 deficiency in animal models can help us to better understand the cellular, molecular, and genetic mechanisms underlying the onset of the disease, and will pave the way for early diagnosis and prevention of susceptible subjects and effective intervention for LPAC in patients.
Collapse
Affiliation(s)
- Helen H. Wang
- Department of Medicine and Genetics, Division of Gastroenterology and Liver Diseases, Marion Bessin Liver Research Center, Einstein-Mount Sinai Diabetes Research Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA;
| | - Piero Portincasa
- Department of Biomedical Sciences and Human Oncology, Clinica Medica “A. Murri”, University of Bari Medical School, 70124 Bari, Italy;
| | - Min Liu
- Department of Pathology and Laboratory Medicine, University of Cincinnati College of Medicine, Cincinnati, OH 45237, USA;
| | - David Q.-H. Wang
- Department of Medicine and Genetics, Division of Gastroenterology and Liver Diseases, Marion Bessin Liver Research Center, Einstein-Mount Sinai Diabetes Research Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA;
| |
Collapse
|
5
|
Choudhuri S, Klaassen CD. MOLECULAR REGULATION OF BILE ACID HOMEOSTASIS. Drug Metab Dispos 2021; 50:425-455. [PMID: 34686523 DOI: 10.1124/dmd.121.000643] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 10/20/2021] [Indexed: 11/22/2022] Open
Abstract
Bile acids have been known for decades to aid in the digestion and absorption of dietary fats and fat-soluble vitamins in the intestine. The development of gene knockout mice models and transgenic humanized mouse models have helped us understand other function of bile acids, such as their role in modulating fat, glucose, and energy metabolism, and in the molecular regulation of the synthesis, transport, and homeostasis of bile acids. The G-protein coupled receptor TGR5 regulates the bile acid induced alterations of intermediary metabolism, while the nuclear receptor FXR regulates bile acid synthesis and homeostasis. However, this review indicates that unidentified factors in addition to FXR must exist to aid in the regulation of bile acid synthesis and homeostasis. Significance Statement This review captures the present understanding of bile acid synthesis, the role of bile acid transporters in the enterohepatic circulation of bile acids, the role of the nuclear receptor FXR on the regulation of bile acid synthesis and bile acid transporters, and the importance of bile acids in activating GPCR signaling via TGR5 to modify intermediary metabolism. This information is useful for developing drugs for the treatment of various hepatic and intestinal diseases, as well as the metabolic syndrome.
Collapse
Affiliation(s)
| | - Curtis D Klaassen
- Environmental & Occupational Health Sciences, Univ Washington, United States
| |
Collapse
|
6
|
Felzen A, Verkade HJ. The spectrum of Progressive Familial Intrahepatic Cholestasis diseases: Update on pathophysiology and emerging treatments. Eur J Med Genet 2021; 64:104317. [PMID: 34478903 DOI: 10.1016/j.ejmg.2021.104317] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 08/11/2021] [Accepted: 08/22/2021] [Indexed: 02/07/2023]
Abstract
The Progressive Familial Intrahepatic Cholestasis (PFIC) disease spectrum encompasses a variety of genetic diseases that affect the bile production and the secretion of bile acids. Typically, the first presentation of these diseases is in early childhood, frequently followed by a severe course necessitating liver transplantation before adulthood. Except for transplantation, treatment modalities have been rather limited and frequently only aim at the symptoms of cholestasis, such as cholestatic pruritus. In recent years, progress has been made in understanding the pathophysiology of these diseases and new treatment modalities have been emerging. Herewith we summarize the latest developments in the field and formulate the current key questions and opportunities for further progress.
Collapse
Affiliation(s)
- Antonia Felzen
- Pediatric Gastroenterology and Hepatology, University Medical Center Groningen, University of Groningen, the Netherlands
| | - Henkjan J Verkade
- Pediatric Gastroenterology and Hepatology, University Medical Center Groningen, University of Groningen, the Netherlands.
| |
Collapse
|
7
|
Abstract
INTRODUCTION NAFLD has grown to become the most prevalent liver disease in the world, with a quarter of the general population estimated to have the disease. NASH, characterized as NAFLD with inflammation, is associated with worsening fibrosis along with increased incidence of HCC. Despite high prevalence of this disease, no pharmacologic treatments approved by regulatory agencies are available. AREAS COVERED This review briefly discusses present understanding of NASH pathology and currently available treatments. We also discuss data on the role of OCA as an FXR agonist in modulating disease in NASH. A comprehensive literature search of review articles, original research articles, and prospective clinical trials from 1998 to the present was performed. EXPERT OPINION Based on 18-month interim findings of the REGENERATE trial, OCA likely improves fibrosis in NASH and therefore may have a beneficial effect in delaying or even preventing cirrhosis. The side effect of an atherogenic lipoprotein profile may adversely affect long-term outcomes, though studies have shown that co-administration of statins is able to mitigate this effect. OCA is likely to become an option for treatment, but the specific context within which it may be prescribed still needs to be clarified.
Collapse
Affiliation(s)
- Raj A Shah
- Liver Institute Northwest , Seattle, WA, USA
| | | |
Collapse
|
8
|
Wang HH, Portincasa P, Liu M, Tso P, Wang DQH. Similarities and differences between biliary sludge and microlithiasis: Their clinical and pathophysiological significances. LIVER RESEARCH 2018; 2:186-199. [PMID: 34367716 PMCID: PMC8341470 DOI: 10.1016/j.livres.2018.10.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The terms biliary sludge and cholesterol microlithiasis (hereafter referred to as microlithiasis) were originated from different diagnostic techniques and may represent different stages of cholesterol gallstone disease. Although the pathogenesis of biliary sludge and microlithiasis may be similar, microlithiasis could be preceded by biliary sludge, followed by persistent precipitation and aggregation of solid cholesterol crystals, and eventually, gallstone formation. Many clinical conditions are clearly associated with the formation of biliary sludge and microlithiasis, including total parenteral nutrition, rapid weight loss, pregnancy, organ transplantation, administration of certain medications, and a variety of acute and chronic illnesses. Numerous studies have demonstrated complete resolution of biliary sludge in approximately 40% of patients, a cyclic pattern of disappearing and reappearing in about 40%, and progression to gallstones in nearly 20%. Although only a minority of patients with ultrasonographic demonstration of biliary sludge develop gallstones, it is still a matter of controversy whether microlithiasis could eventually evolve to cholesterol gallstones. Biliary sludge and microlithiasis are asymptomatic in the vast majority of patients; however, they can cause biliary colic, acute cholecystitis, and acute pancreatitis. Biliary sludge and microlithiasis are most often diagnosed ultrasonographically and bile microscopy is considered the gold standard for their diagnosis. Specific measures to prevent the development of biliary sludge are not practical or cost-effective in the general population. Laparoscopic cholecystectomy offers the most definitive therapy on biliary sludge. Endoscopic sphincterotomy or surgical intervention is effective for microlithiasis-induced pancreatitis. Ursodeoxycholic acid can effectively prevent the recurrence of solid cholesterol crystals and significantly reduce the risk of recurrent pancreatitis.
Collapse
Affiliation(s)
- Helen H. Wang
- Department of Medicine, Division of Gastroenterology and Liver Diseases, Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Piero Portincasa
- Department of Biomedical Sciences and Human Oncology, Clinica Medica “A. Murri”, University of Bari “Aldo Moro” Medical School, Bari, Italy
| | - Min Liu
- Department of Pathology and Laboratory Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Patrick Tso
- Department of Pathology and Laboratory Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - David Q.-H. Wang
- Department of Medicine, Division of Gastroenterology and Liver Diseases, Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, NY, USA,Corresponding author. Department of Medicine, Division of Gastroenterology and Liver Diseases, Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, NY, USA., (D.Q.-H. Wang)
| |
Collapse
|
9
|
Tan YW, Ji HL, Lu ZH, Ge GH, Sun L, Zhou XB, Sheng JH, Gong YH. Ductopenia and cirrhosis in a 32-year-old woman with progressive familial intrahepatic cholestasis type 3: A case report and review of the literature. World J Gastroenterol 2018; 24:4716-4720. [PMID: 30416319 PMCID: PMC6224472 DOI: 10.3748/wjg.v24.i41.4716] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 08/31/2018] [Accepted: 10/05/2018] [Indexed: 02/06/2023] Open
Abstract
Progressive familial intrahepatic cholestasis type 3 is caused by a mutation in the ATP-binding cassette, subfamily B, member 4 (ABCB4) gene encoding multidrug resistance protein 3. A 32-year-old woman with a history of acute hepatitis at age 9 years was found to have jaundice during pregnancy in 2008, and was diagnosed as having intrahepatic cholestasis of pregnancy. In 2009, she underwent cholecystectomy for gallstones and chronic cholecystitis. However, itching and jaundice did not resolve postoperatively. She was admitted to our hospital with fatigue, jaundice, and a recently elevated γ-glutamyl transpeptidase level. Liver biopsy led to the diagnosis of biliary cirrhosis with ductopenia. Genetic testing revealed a pathogenic heterozygous mutation, ex13 c.1531G > A (p.A511T), in the ABCB4 gene. Her father did not carry the mutation, but her mother’s brother carried the heterozygous mutation. We made a definitive diagnosis of familial intrahepatic cholestasis type 3. Her symptoms and liver function improved after 3 mo of treatment with ursodeoxycholic acid.
Collapse
Affiliation(s)
- You-Wen Tan
- Department of Hepatology, The Third Hospital of Zhenjiang Affiliated Jiangsu University, Zhenjiang 212003, Jiangsu Province, China
| | - Hai-Lei Ji
- Department of Hepatology, The Third Hospital of Zhenjiang Affiliated Jiangsu University, Zhenjiang 212003, Jiangsu Province, China
| | - Zhong-Hua Lu
- Department of Liver Disease, Wuxi No. 5 People’s Hospital Affiliated to Jiangnan University, Wuxi 214000, Jiangsu Province, China
| | - Guo-Hong Ge
- Department of Hepatology, The Third Hospital of Zhenjiang Affiliated Jiangsu University, Zhenjiang 212003, Jiangsu Province, China
| | - Li Sun
- Department of Hepatology, The Third Hospital of Zhenjiang Affiliated Jiangsu University, Zhenjiang 212003, Jiangsu Province, China
| | - Xin-Bei Zhou
- Department of Hepatology, The Third Hospital of Zhenjiang Affiliated Jiangsu University, Zhenjiang 212003, Jiangsu Province, China
| | - Jian-Hui Sheng
- Department of Hepatology, The Third Hospital of Zhenjiang Affiliated Jiangsu University, Zhenjiang 212003, Jiangsu Province, China
| | - Yu-Hua Gong
- Department of Hepatology, The Third Hospital of Zhenjiang Affiliated Jiangsu University, Zhenjiang 212003, Jiangsu Province, China
| |
Collapse
|
10
|
Khabou B, Mahjoub B, Barbu V, Balhoudi N, Wardani A, Sfar MT, Fakhfakh F. Phenotypic variability in Tunisian PFIC3 patients harboring a complex genotype with a differential clinical outcome of UDCA treatment. Clin Chim Acta 2018; 486:122-128. [DOI: 10.1016/j.cca.2018.07.035] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 07/09/2018] [Accepted: 07/19/2018] [Indexed: 12/27/2022]
|
11
|
Shagrani M, Burkholder J, Broering D, Abouelhoda M, Faquih T, El-Kalioby M, Subhani SN, Goljan E, Albar R, Monies D, Mazhar N, AlAbdulaziz BS, Abdelrahman KA, Altassan N, Alkuraya FS. Genetic profiling of children with advanced cholestatic liver disease. Clin Genet 2017; 92:52-61. [PMID: 28039895 DOI: 10.1111/cge.12959] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Accepted: 12/27/2016] [Indexed: 12/12/2022]
Abstract
Advanced cholestatic liver disease is a leading referral to pediatric liver transplant centers. Recent advances in the genetic classification of this group of disorders promise a highly personalized management although the genetic heterogeneity also poses a diagnostic challenge. Using a next-generation sequencing-based multi-gene panel, we performed retrospective analysis of 98 pediatric patients who presented with advanced cholestatic liver disease. A likely causal mutation was identified in the majority (61%), spanning many genes including ones that have only rarely been reported to cause cholestatic liver disease, e.g. TJP2 and VIPAS39. We find no evidence to support mono-allelic phenotypic expression in the carrier parents despite the severe nature of the respective mutations, and no evidence of oligogenicity. The high-carrier frequency of the founder mutations identified in our cohort (1 in 87) suggests a minimum incidence of 1:7246, an alarmingly high disease burden that calls for the primary prevention through carrier screening.
Collapse
Affiliation(s)
- M Shagrani
- Organ Transplant Centre, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia.,Department of Medicine, College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
| | - J Burkholder
- Organ Transplant Centre, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - D Broering
- Organ Transplant Centre, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - M Abouelhoda
- Saudi Human Genome Project, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia.,Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - T Faquih
- Saudi Human Genome Project, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia.,Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - M El-Kalioby
- Saudi Human Genome Project, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia.,Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - S N Subhani
- Saudi Human Genome Project, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia.,Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - E Goljan
- Saudi Human Genome Project, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia.,Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - R Albar
- Saudi Human Genome Project, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia
| | - D Monies
- Saudi Human Genome Project, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia.,Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - N Mazhar
- Saudi Human Genome Project, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia
| | - B S AlAbdulaziz
- Saudi Human Genome Project, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia
| | - K A Abdelrahman
- Saudi Human Genome Project, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia
| | - N Altassan
- Saudi Human Genome Project, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia.,Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - F S Alkuraya
- Saudi Human Genome Project, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia.,Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia.,Department of Anatomy and Cell Biology, College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
| |
Collapse
|
12
|
Mosedale M, Watkins PB. Drug-induced liver injury: Advances in mechanistic understanding that will inform risk management. Clin Pharmacol Ther 2017; 101:469-480. [PMID: 27861792 DOI: 10.1002/cpt.564] [Citation(s) in RCA: 141] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 10/26/2016] [Accepted: 11/06/2016] [Indexed: 12/11/2022]
Abstract
Drug-induced liver injury (DILI) is a major public health problem. Intrinsic (dose-dependent) DILI associated with acetaminophen overdose is the number one cause of acute liver failure in the US. However, the most problematic type of DILI impacting drug development is idiosyncratic, occurring only very rarely among treated patients and often only after several weeks or months of treatment with the offending drug. Recent advances in our understanding of the pathogenesis of DILI suggest that three mechanisms may underlie most hepatocyte effects in response to both intrinsic and idiosyncratic DILI drugs: mitochondrial dysfunction, oxidative stress, and alterations in bile acid homeostasis. However, in some cases hepatocyte stress promotes an immune response that results in clinically important idiosyncratic DILI. This review discusses recent advances in our understanding of the pathogenesis of both intrinsic and idiosyncratic DILI as well as emerging tools and techniques that will likely improve DILI risk identification and management.
Collapse
Affiliation(s)
- M Mosedale
- Institute for Drug Safety Sciences, University of North Carolina at Chapel Hill, Research Triangle Park, North Carolina, USA; Division of Pharmacotherapy and Experimental Therapeutics, UNC Eshelman School of Pharmacy, Chapel Hill, North Carolina, USA
| | - P B Watkins
- Institute for Drug Safety Sciences, University of North Carolina at Chapel Hill, Research Triangle Park, North Carolina, USA; Division of Pharmacotherapy and Experimental Therapeutics, UNC Eshelman School of Pharmacy, Chapel Hill, North Carolina, USA
| |
Collapse
|
13
|
Khabou B, Siala-Sahnoun O, Gargouri L, Mkaouar-Rebai E, Keskes L, Hachicha M, Fakhfakh F. In silico investigation of the impact of synonymous variants in ABCB4 gene on mRNA stability/structure, splicing accuracy and codon usage: Potential contribution to PFIC3 disease. Comput Biol Chem 2016; 65:103-109. [PMID: 27788395 DOI: 10.1016/j.compbiolchem.2016.10.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 09/28/2016] [Accepted: 10/21/2016] [Indexed: 12/12/2022]
Abstract
Progressive Familial Intrahepatic Cholestasis type 3 (PFIC3) is an autosomal-recessive liver disease due to mutations in the ABCB4 gene encoding for the MDR3 protein. In the present study, we performed molecular and bioinformatic analyses in PFIC3 patients in order to understand the molecular basis of the disease. The three studied patients with PFIC3 were screened by PCR amplification followed by direct sequencing of the 27 coding exons of ABCB4. In silico analysis was performed by bioinformatic programs. We revealed three synonymous polymorphisms c.175C>T, c.504C>T, c.711A>T respectively in exon 4, 6, 8 and an intronic c.3487-16T>C variation in intron 26. The computational study of these polymorphic variants using Human Splicing Finder, ex-skip, Mfold and kineFold tools showed the putative impact on the composition of the cis-acting regulatory elements of splicing as well as on the mRNA structure and stability. Moreover, the protein level was affected by codon usage changes estimated by the calculation of ΔRSCU and ΔLog Ratio of codon frequencies interfering as consequence with the accurate folding of the MDR3 protein. As the first initiative of the mutational study of ABCB4 genes in Tunisia, our results are suggestive of a potential downstream molecular effect for the described polymorphisms on the expression pattern of the ABCB4 underlining the importance of synonymous variants.
Collapse
Affiliation(s)
- Boudour Khabou
- Laboratory of Human Molecular Genetics, Faculty of Medicine, University of Sfax, Tunisia.
| | - Olfa Siala-Sahnoun
- Department of Life Science, Faculty of Science of Sfax, University of Sfax., Tunisia
| | | | - Emna Mkaouar-Rebai
- Department of Life Science, Faculty of Science of Sfax, University of Sfax., Tunisia.
| | - Leila Keskes
- Laboratory of Human Molecular Genetics, Faculty of Medicine, University of Sfax, Tunisia
| | | | - Faiza Fakhfakh
- Department of Life Science, Faculty of Science of Sfax, University of Sfax., Tunisia
| |
Collapse
|
14
|
Gordo-Gilart R, Hierro L, Andueza S, Muñoz-Bartolo G, López C, Díaz C, Jara P, Álvarez L. Heterozygous ABCB4 mutations in children with cholestatic liver disease. Liver Int 2016; 36:258-67. [PMID: 26153658 DOI: 10.1111/liv.12910] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Accepted: 07/01/2015] [Indexed: 02/13/2023]
Abstract
BACKGROUND & AIMS Monoallelic defects in ABCB4, which encodes the canalicular floppase for phosphatidylcholine MDR3, have been encountered in association with a variety of hepatobiliary disorders, particularly in adult subjects. In this study, we examined the presence of heterozygous ABCB4 variants in a cohort of children with chronic cholestasis and assessed the pathogenicity of the missense changes identified. METHODS Sixty-seven children with chronic liver dysfunction were studied by the sequencing of ABCB4 and multiplex ligation-dependent probe amplification analysis. The molecular defects arising from missense variants were analysed in MDCK-II and AD-293 cells. RESULTS Defects in a single allele of ABCB4 were identified in nine subjects. They included one small insertion (p.I1242Nfs), one nonsense mutation (p.R144X) and six missense changes (p.T175A, p.G228R, p.A250T, p.S320F, p.P352L and p.A934T). In four children, these defects in ABCB4 co-existed with various medical conditions. In vitro phenotyping of the six missense variants revealed that four (T175A, G228R, S320F and A934T) led to reduced MDR3 protein levels. Two mutations (G228R and A934T) resulted in trapping of the protein in the endoplasmic reticulum. Phosphatidylcholine efflux activity was decreased to 56-18% of reference levels for MDR3 mutants T175A, A250T and S320F. The G228R, P352L and A934T mutants were found to be non-functional. CONCLUSIONS These results illustrate the varying effects of ABCB4 missense mutations and suggest that even a modest reduction in MDR3 activity may contribute or predispose to the onset of cholestatic liver disease in the paediatric age.
Collapse
Affiliation(s)
| | - Loreto Hierro
- La Paz University Hospital Health Research Institute-IdiPAZ, Madrid, Spain.,Pediatric Liver Service, La Paz Children's University Hospital, Madrid, Spain
| | - Sara Andueza
- La Paz University Hospital Health Research Institute-IdiPAZ, Madrid, Spain
| | - Gema Muñoz-Bartolo
- La Paz University Hospital Health Research Institute-IdiPAZ, Madrid, Spain.,Pediatric Liver Service, La Paz Children's University Hospital, Madrid, Spain
| | - Carola López
- Pediatric Gastroenterology, Hepatology and Nutrition Unit, Pereira Rossell Hospital, Montevideo, Uruguay
| | - Carmen Díaz
- La Paz University Hospital Health Research Institute-IdiPAZ, Madrid, Spain.,Pediatric Liver Service, La Paz Children's University Hospital, Madrid, Spain
| | - Paloma Jara
- La Paz University Hospital Health Research Institute-IdiPAZ, Madrid, Spain.,Pediatric Liver Service, La Paz Children's University Hospital, Madrid, Spain
| | - Luis Álvarez
- La Paz University Hospital Health Research Institute-IdiPAZ, Madrid, Spain
| |
Collapse
|
15
|
Reversal of advanced fibrosis after long-term ursodeoxycholic acid therapy in a patient with residual expression of MdR3. Ann Hepatol 2015. [PMID: 26256905 DOI: 10.1016/s1665-2681(19)30771-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
|
16
|
Vij M, Safwan M, Shanmugam NP, Rela M. Liver pathology in severe multidrug resistant 3 protein deficiency: a series of 10 pediatric cases. Ann Diagn Pathol 2015; 19:277-82. [PMID: 26117383 DOI: 10.1016/j.anndiagpath.2015.06.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 05/30/2015] [Accepted: 06/03/2015] [Indexed: 12/12/2022]
Abstract
Multidrug resistance protein 3 (MDR3) is a hepatocyte canalicular membrane protein encoded by the ABCB4/MDR3 gene located on chromosome 7. Several liver diseases are known to be associated with MDR3 deficiency. The basic defect is reduced secretion of biliary phospholipid causing disturbance in the primary bile composition, leading to injury to biliary epithelium inducing cell death and inflammation. Severe MDR3 deficiency typically presents during the first year of life or early childhood, often progressing to chronic liver disease with cirrhosis and portal hypertension, requiring liver transplantation. Negative MDR3 immunostaining is suggestive of MDR3 deficiency. Herein, we report the clinical and histopathologic features of 10 cases (6 male/4 female) in infants and children with severe MDR3 deficiency (age range of 8 months to 7 years) diagnosed with negative MDR3 immunostaining in hepatic canaliculi. Three cases underwent liver transplantation. The cases showed periportal bridging fibrosis to micronodular cirrhosis, ductular proliferation with bile plugs, and lobular canalicular bile stasis with rosetting. All 3 explant livers demonstrated cystically dilated large ducts with crystallization of cholesterol. One case showed well-differentiated hepatocellular carcinoma. We conclude that MDR3 immunostaining on formalin-fixed and paraffin-embedded sections is a useful tool to diagnose severe MDR3 deficiency in pediatric liver cholestatic disease cases where genetic testing is not available.
Collapse
Affiliation(s)
- Mukul Vij
- Department of Pathology, Global Health City, Chennai, Tamil Nadu, India, 600100.
| | - Mohamed Safwan
- Institute of Liver Disease and Transplantation, Global Health City, Chennai, Tamil Nadu, India, 600100
| | - Naresh P Shanmugam
- Institute of Liver Disease and Transplantation, Global Health City, Chennai, Tamil Nadu, India, 600100
| | - Mohamed Rela
- Institute of Liver Disease and Transplantation, Global Health City, Chennai, Tamil Nadu, India, 600100; National Foundation for Liver Research, Chennai, Tamil Nadu, India
| |
Collapse
|
17
|
Elderman JH, ter Borg PCJ, Dees J, Dees A. Pregnancy and ABCB4 gene mutation: risk of recurrent cholelithiasis. BMJ Case Rep 2015; 2015:bcr-2014-206919. [PMID: 25612754 DOI: 10.1136/bcr-2014-206919] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Cholelithiasis is a common problem in the Western world. Recurrent gallstones after cholecystectomy, however, are rare. We describe a case of a young woman with recurrent gallstones after a laparoscopic cholecystectomy leading to cholangitis during pregnancy. Additional testing revealed an ATP-binding cassette B4 (ABCB4) gene mutation. ABCB4 gene mutations leading to a multidrug resistance (MDR)3-P-glycoprotein deficiency are related to, among other diseases, recurrent cholelithiasis. Medical treatment consists of administering oral ursodeoxycholic acid. If untreated, MDR3 deficiency can lead to progressive liver failure requiring liver transplantation.
Collapse
Affiliation(s)
- Jan H Elderman
- Department of Medicine, Ikazia Hospital, Rotterdam, The Netherlands
| | | | - Jan Dees
- Department of Gastroenterology, Erasmus MC, Rotterdam, The Netherlands
| | - Adriaan Dees
- Department of Medicine, Ikazia Hospital, Rotterdam, The Netherlands
| |
Collapse
|