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Aldrian D, Bochdansky C, Kavallar AM, Mayerhofer C, Deeb A, Habeb A, Romera Rabasa A, Khadilkar A, Uçar A, Knoppke B, Zafeiriou D, Lang-Muritano M, Miqdady M, Judmaier S, McLin V, Furdela V, Müller T, Vogel GF. Natural history of Wolcott-Rallison syndrome: A systematic review and follow-up study. Liver Int 2024; 44:811-822. [PMID: 38230874 DOI: 10.1111/liv.15834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 12/19/2023] [Accepted: 12/22/2023] [Indexed: 01/18/2024]
Abstract
BACKGROUND AND AIMS To systematically review the literature for reports on Wolcott-Rallison syndrome, focusing on the spectrum and natural history, genotype-phenotype correlations, patient and native liver survival, and long-term outcomes. METHODS PubMed, Livio, Google Scholar, Scopus and Web of Science databases were searched. Data on genotype, phenotype, therapy, cause of death and follow-up were extracted. Survival and correlation analyses were performed. RESULTS Sixty-two studies with 159 patients met the inclusion criteria and additional 30 WRS individuals were collected by personal contact. The median age of presentation was 2.5 months (IQR 2) and of death was 36 months (IQR 50.75). The most frequent clinical feature was neonatal diabetes in all patients, followed by liver impairment in 73%, impaired growth in 72%, skeletal abnormalities in 59.8%, the nervous system in 37.6%, the kidney in 35.4%, insufficient haematopoiesis in 34.4%, hypothyroidism in 14.8% and exocrine pancreas insufficiency in 10.6%. Episodes of acute liver failure were frequently reported. Liver transplantation was performed in six, combined liver-pancreas in one and combined liver-pancreas-kidney transplantation in two individuals. Patient survival was significantly better in the transplant cohort (p = .0057). One-, five- and ten-year patient survival rates were 89.4%, 65.5% and 53.1%, respectively. Liver failure was reported as the leading cause of death in 17.9% of cases. Overall survival was better in individuals with missense mutations (p = .013). CONCLUSION Wolcott-Rallison syndrome has variable clinical courses. Overall survival is better in individuals with missense mutations. Liver- or multi-organ transplantation is a feasible treatment option to improve survival.
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Affiliation(s)
- Denise Aldrian
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Clemens Bochdansky
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Anna M Kavallar
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Christoph Mayerhofer
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Asma Deeb
- Paediatric Endocrinology Division, Sheikh Shakhbout Medical City, Khalifa University, Abu Dhabi, United Arab Emirates
| | - Abdelhadi Habeb
- Department of Pediatrics, Prince Mohamed bin Abdulaziz Hospital, National Guard Health Affairs, Madinah, Saudi Arabia
| | - Andrea Romera Rabasa
- Department of Pediatric Anesthesia, Gregorio Marañón University Hospital, Madrid, Spain
| | - Anuradha Khadilkar
- Hirabai Cowasji Jehangir Medical Research Institute, Jehangir Hospital, Pune, India
| | - Ahmet Uçar
- Department of Pediatric Endocrinology & Diabetes, University of Health Sciences, Şişli Hamidiye Etfal Health Practices & Research Centre, Istanbul, Turkey
| | - Birgit Knoppke
- University Children's Hospital Regensburg (KUNO), University Medical Center Regensburg, Regensburg, Germany
| | - Dimitrios Zafeiriou
- 1st Department of Pediatrics, Hippokratio General Hospital, Aristotle University, Thessaloniki, Greece
| | - Mariarosaria Lang-Muritano
- Department of Endocrinology and Diabetology and Children's Research Centre, University Children's Hospital, Zurich, Switzerland
| | - Mohamad Miqdady
- Division of Pediatric Gastroenterology, Sheikh Khalifa Medical City, Abu Dhabi, United Arab Emirates
| | - Sylvia Judmaier
- Department of Paediatrics, LKH Hochsteiermark/Standort Leoben, Leoben, Austria
| | - Valerié McLin
- Department of Pediatrics, Gynecology and Obstetrics, Swiss Pediatric Liver Center, University of Geneva, Geneva, Switzerland
| | - Viktoriya Furdela
- Department of Pediatrics, I. Horbachevsky Ternopil National Medical University, Ternopil, Ukraine
| | - Thomas Müller
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Georg F Vogel
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
- Institute of Cell Biology, Medical University of Innsbruck, Innsbruck, Austria
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Aldrian D, Waldner B, Vogel GF, El-Gharbawy AH, McKiernan P, Vockley J, Landau YE, Al Mutairi F, Stepien KM, Kwok AMK, Yıldız Y, Honzik T, Kelifova S, Ellaway C, Lund AM, Mori M, Grünert SC, Scholl-Bürgi S, Zöggeler T, Oberhuber R, Schneeberger S, Müller T, Karall D. Impact of citrulline substitution on clinical outcome after liver transplantation in carbamoyl phosphate synthetase 1 and ornithine transcarbamylase deficiency. J Inherit Metab Dis 2024; 47:220-229. [PMID: 38375550 DOI: 10.1002/jimd.12717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 01/12/2024] [Accepted: 01/18/2024] [Indexed: 02/21/2024]
Abstract
Carbamoyl phosphate synthetase 1 (CPS1) and ornithine transcarbamylase (OTC) deficiencies are rare urea cycle disorders, which can lead to life-threatening hyperammonemia. Liver transplantation (LT) provides a cure and offers an alternative to medical treatment and life-long dietary restrictions with permanent impending risk of hyperammonemia. Nevertheless, in most patients, metabolic aberrations persist after LT, especially low plasma citrulline levels, with questionable clinical impact. So far, little is known about these alterations and there is no consensus, whether l-citrulline substitution after LT improves patients' symptoms and outcomes. In this multicentre, retrospective, observational study of 24 patients who underwent LT for CPS1 (n = 11) or OTC (n = 13) deficiency, 25% did not receive l-citrulline or arginine substitution. Correlation analysis revealed no correlation between substitution dosage and citrulline levels (CPS1, p = 0.8 and OTC, p = 1). Arginine levels after liver transplantation were normal after LT independent of citrulline substitution. Native liver survival had no impact on mental impairment (p = 0.67). Regression analysis showed no correlation between l-citrulline substitution and failure to thrive (p = 0.611) or neurological outcome (p = 0.701). Peak ammonia had a significant effect on mental impairment (p = 0.017). Peak plasma ammonia levels correlate with mental impairment after LT in CPS1 and OTC deficiency. Growth and intellectual impairment after LT are not significantly associated with l-citrulline substitution.
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Affiliation(s)
- Denise Aldrian
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Birgit Waldner
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Georg F Vogel
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
- Institute of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Areeg H El-Gharbawy
- Division of Medical Genetics, University of Pittsburgh School of Medicine, Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Patrick McKiernan
- Department of Pediatrics, University of Pittsburgh School of Medicine, UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Jerard Vockley
- Department of Pediatrics, University of Pittsburgh School of Medicine, UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Yuval E Landau
- Metabolic Disease Unit, Schneider Children's Medical Center of Israel, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Fuad Al Mutairi
- Genetics and Precision Medicine Department, King Abdullah Specialized Children Hospital, King Abdulaziz Medical City MNG-HA, Riyadh, Saudi Arabia
- King Abdullah International Medical Research Center, King Saud Bin Abdulaziz University for Health Sciences, Ministry of National Guard-Health Affairs, Riyadh, Saudi Arabia
| | - Karolina M Stepien
- Adult Inherited Metabolic Diseases, Salford Royal Organisation, Northern Care Alliance NHS Foundation Trust, Salford, Greater Manchester, UK
| | - Anne Mei-Kwun Kwok
- Department of Pediatrics and Adolescent Medicine, Hong Kong Children's Hospital, Kowloon, Hong Kong
| | - Yılmaz Yıldız
- Division of Pediatric Metabolism, Department of Pediatrics, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Tomas Honzik
- Department of Pediatrics and Inherited Metabolic Disorders, First Faculty of Medicine, Charles University, General University Hospital in Prague, Prague, Czech Republic
| | - Silvie Kelifova
- Department of Pediatrics and Inherited Metabolic Disorders, First Faculty of Medicine, Charles University, General University Hospital in Prague, Prague, Czech Republic
| | - Carolyn Ellaway
- Genetic Metabolic Disorders Service, Sydney Children's Hospital Network, Sydney, New South Wales, Australia
- Disciplines of Child and Adolescent Health and Genomic Medicine, University of Sydney, Sydney, Australia
| | - Allan M Lund
- Departments of Clinical Genetics and Pediatrics, Center for Inherited Metabolic Diseases, Rigshospitalet, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Mari Mori
- Department of Pediatrics, The Ohio State University College of Medicine, Columbus, Ohio, USA
- Division of Genetic and Genomic Medicine, Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Sarah C Grünert
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Centre-University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Sabine Scholl-Bürgi
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Thomas Zöggeler
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Rupert Oberhuber
- Department of Visceral, Transplant and Thoracic Surgery, Center of Operative Medicine, Medical University of Innsbruck, Innsbruck, Austria
| | - Stefan Schneeberger
- Department of Visceral, Transplant and Thoracic Surgery, Center of Operative Medicine, Medical University of Innsbruck, Innsbruck, Austria
| | - Thomas Müller
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Daniela Karall
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
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Vogel GF, Feichtinger RG, Mayr JA, Wortmann SB. Response to Kulseth. Genet Med 2024; 26:101040. [PMID: 38226982 DOI: 10.1016/j.gim.2023.101040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 11/30/2023] [Accepted: 11/30/2023] [Indexed: 01/17/2024] Open
Affiliation(s)
- Georg F Vogel
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria; Institute of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria.
| | - René G Feichtinger
- University Children's Hospital, Salzburger Landeskliniken and Paracelsus Medical University, Salzburg, Austria
| | - Johannes A Mayr
- University Children's Hospital, Salzburger Landeskliniken and Paracelsus Medical University, Salzburg, Austria
| | - Saskia B Wortmann
- University Children's Hospital, Salzburger Landeskliniken and Paracelsus Medical University, Salzburg, Austria; Amalia Children's Hospital, Radboudumc, Nijmegen, The Netherlands
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4
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Koelink PJ, Gómez-Mellado VE, Duijst S, van Roest M, Meisner S, Ho-Mok KS, Frank S, Appelman BS, Ten Bloemendaal L, Vogel GF, van de Graaf SFJ, Bosma PJ, Oude Elferink RPJ, Wildenberg ME, Paulusma CC. The phospholipid flippase ATP8B1 is involved in the pathogenesis of Ulcerative Colitis via establishment of intestinal barrier function. J Crohns Colitis 2024:jjae024. [PMID: 38366839 DOI: 10.1093/ecco-jcc/jjae024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Indexed: 02/18/2024]
Abstract
OBJECTIVE Patients with mutations in ATP8B1 develop Progressive Familial Intrahepatic Cholestasis type 1 (PFIC1), a severe liver disease that requires life-saving liver transplantation. PFIC1 patients also present with gastrointestinal problems, including intestinal inflammation and diarrhea, which are aggravated after liver transplantation. Here we investigate the intestinal function of ATP8B1 in relation to inflammatory bowel diseases. DESIGN ATP8B1 expression was investigated in intestinal samples of patients with Crohn's Disease (CD) or Ulcerative Colitis (UC) as well as in murine models of intestinal inflammation. Colitis was induced in ATP8B1-deficient mice with Dextran Sodium Sulphate (DSS) and intestinal permeability was investigated. Epithelial barrier function was assessed in ATP8B1 knock-down Caco2-BBE cells. Co-immunoprecipitation experiments were performed in Caco2-BBE cells overexpressing ATP8B1-eGFP. Expression and localization of ATP8B1 and tight junction proteins were investigated in cells and in biopsies of UC and PFIC1 patients. RESULTS ATP8B1 expression was decreased in UC and DSS-treated mice, and associated with a decreased Tight Junctional pathway transcriptional program. ATP8B1-deficient mice were extremely sensisitve to DSS-induced colitis, evidenced by increased intestinal barrier leakage. ATP8B1 knockdown cells showed delayed barrier establishment that associated with affected Claudin-4 (CLDN4) levels and localization.. CLDN4 immunohistochemistry showed a tight-junctional staining in control tissue, whereas in UC and intestinal PFIC1 samples, CLDN4 was not properly localized. CONCLUSION ATP8B1 is important in the establishment of the intestinal barrier Downregulation of ATP8B1 levels in UC, and subsequent altered localization of tight junctional proteins, including CLDN4, might therefore be an important mechanism in UC pathophysiology.
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Affiliation(s)
- Pim J Koelink
- Amsterdam University Medical Centers, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Amsterdam, The Netherlands
- Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam, The Netherlands
| | - Valentina E Gómez-Mellado
- Amsterdam University Medical Centers, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Amsterdam, The Netherlands
- Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam, The Netherlands
| | - Suzanne Duijst
- Amsterdam University Medical Centers, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Amsterdam, The Netherlands
- Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam, The Netherlands
| | - Manon van Roest
- Amsterdam University Medical Centers, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Amsterdam, The Netherlands
- Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam, The Netherlands
| | - Sander Meisner
- Amsterdam University Medical Centers, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Amsterdam, The Netherlands
- Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam, The Netherlands
| | - Kam S Ho-Mok
- Amsterdam University Medical Centers, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Amsterdam, The Netherlands
- Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam, The Netherlands
| | - Sabrina Frank
- Amsterdam University Medical Centers, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Amsterdam, The Netherlands
| | - Babette S Appelman
- Amsterdam University Medical Centers, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Amsterdam, The Netherlands
| | - Lysbeth Ten Bloemendaal
- Amsterdam University Medical Centers, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Amsterdam, The Netherlands
- Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam, The Netherlands
| | - Georg F Vogel
- Department of Paediatrics I, Medical University of Innsbruck, 6020 Innsbruck, Austria
- Institute of Cell Biology, Biocenter, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Stan F J van de Graaf
- Amsterdam University Medical Centers, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Amsterdam, The Netherlands
- Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam, The Netherlands
- Department of Gastroenterology and Hepatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Piter J Bosma
- Amsterdam University Medical Centers, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Amsterdam, The Netherlands
- Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam, The Netherlands
- Department of Gastroenterology and Hepatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Ronald P J Oude Elferink
- Amsterdam University Medical Centers, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Amsterdam, The Netherlands
- Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam, The Netherlands
- Department of Gastroenterology and Hepatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Manon E Wildenberg
- Amsterdam University Medical Centers, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Amsterdam, The Netherlands
- Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam, The Netherlands
- Department of Gastroenterology and Hepatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Coen C Paulusma
- Amsterdam University Medical Centers, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Amsterdam, The Netherlands
- Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam, The Netherlands
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5
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Alfares BA, van der Doef HPJ, Wildhaber BE, Casswall T, Nowak G, Delle M, Aldrian D, Berchtold V, Vogel GF, Kaliciński P, Markiewicz-Kijewska M, Kolesnik A, Bernabeu JQ, Hally MM, Larrarte K M, Marra P, Bravi M, Pinelli D, Kasahara M, Sakamoto S, Uchida H, Mali V, Aw M, Franchi-Abella S, Gonzales E, Guérin F, Cervio G, Minetto J, Sierre S, de Santibañes M, Ardiles V, Uno JW, Evans H, Duncan D, McCall J, Hartleif S, Sturm E, Patel J, Mtegha M, Prasad R, Ferreira CT, Nader LS, Farina M, Jaramillo C, Rodriguez-Davalos MI, Feola P, Shah AA, Wood PM, Acord MR, Fischer RT, Mullapudi B, Hendrickson RJ, Khanna R, Pamecha V, Mukund A, Sharif K, Gupte G, McGuirk S, Porta G, Spada M, Alterio T, Maggiore G, Hardikar W, Beretta M, Dierckx R, de Kleine RHJ, Bokkers RPH. Prevalence, management and efficacy of treatment in portal vein obstruction after paediatric liver transplantation: protocol of the retrospective international multicentre PORTAL registry. BMJ Open 2023; 13:e066343. [PMID: 37500271 PMCID: PMC10387733 DOI: 10.1136/bmjopen-2022-066343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/29/2023] Open
Abstract
INTRODUCTION Portal vein obstruction (PVO) consists of anastomotic stenosis and thrombosis, which occurs due to a progression of the former. The aim of this large-scale international study is to assess the prevalence, current management practices and efficacy of treatment in patients with PVO. METHODS AND ANALYSIS The Portal vein Obstruction Revascularisation Therapy After Liver transplantation registry will facilitate an international, retrospective, multicentre, observational study, with 25 centres around the world already actively involved. Paediatric patients (aged <18 years) with a diagnosed PVO between 1 January 2001 and 1 January 2021 after liver transplantation will be eligible for inclusion. The primary endpoints are the prevalence of PVO, primary and secondary patency after PVO intervention and current management practices. Secondary endpoints are patient and graft survival, severe complications of PVO and technical success of revascularisation techniques. ETHICS AND DISSEMINATION Medical Ethics Review Board of the University Medical Center Groningen has approved the study (METc 2021/072). The results of this study will be disseminated via peer-reviewed publications and scientific presentations at national and international conferences. TRIAL REGISTRATION NUMBER Netherlands Trial Register (NL9261).
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Affiliation(s)
- Bader A Alfares
- Department of Radiology, Medical Imaging Center, University Medical Centre Groningen, Groningen, The Netherlands
- King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Hubert P J van der Doef
- Division of Paediatric Gastroenterology and Hepatology, Department of Paediatrics, University Medical Centre Groningen, Groningen, The Netherlands
| | - Barbara E Wildhaber
- Swiss Paediatric Liver Centre, Division of Child and Adolescent Surgery, Geneva University Hospitals, Geneve, Switzerland
| | - Thomas Casswall
- Department Clinical Interventions and Technology Clintec, Division for Paediatrics, Karolinska Institute, Stockholm, Sweden
| | - Greg Nowak
- Department Clinical Interventions and Technology Clintec, Division for Transplantation Surgery, Karolinska Institute, Stockholm, Sweden
| | - Martin Delle
- Department Clinical Science, Intervention and Technology Clintec, Division for Interventional Radiology, Karolinska Institute, Stockholm, Sweden
| | - Denise Aldrian
- Department of Paediatrics, Medical University of Innsbruck, Innsbruck, Austria
| | - Valeria Berchtold
- Department of Visceral, Transplant and Thoracic Surgery, Medical University of Innsbruck, Innsbruck, Austria
| | - Georg F Vogel
- Department of Paediatrics, Medical University of Innsbruck, Innsbruck, Austria
- Institute of Cell Biology, Medical University of Innsbruck, Innsbruck, Austria
| | - Piotr Kaliciński
- Department of Paediatric Surgery and Organ Transplantation, The Children's Memorial Health Institute, Warsaw, Poland
| | | | - Adam Kolesnik
- Cardiovascular Interventions Laboratory, The Children's Memorial Health Institute, Warsaw, Poland
| | - Jesús Q Bernabeu
- Department of Paediatric Gastroenterology, Hepatology and Nutrition, Vall d'Hebron Hospital (HVH), Barcelona, Spain
| | - María Mercadal Hally
- Department of Paediatric Gastroenterology, Hepatology and Nutrition, Vall d'Hebron Hospital (HVH), Barcelona, Spain
| | - Mauricio Larrarte K
- Department of Paediatric Gastroenterology, Hepatology and Nutrition, Vall d'Hebron Hospital (HVH), Barcelona, Spain
| | - Paolo Marra
- Department of Radiology, ASST Papa Giovanni XXIII, Bergamo, Italy
| | - Michela Bravi
- Department of Paediatric Hepatology, Gastroenterology and Transplantation, ASST Papa Giovanni XXIII, Bergamo, Italy
| | - Domenico Pinelli
- Department of Organ Failure and Transplantation, ASST Papa Giovanni XXIII, Bergamo, Italy
| | - Mureo Kasahara
- Organ Transplantation Centre, National Center for Child Health and Development, Tokyo, Japan
| | - Seisuke Sakamoto
- Organ Transplantation Centre, National Center for Child Health and Development, Tokyo, Japan
| | - Hajime Uchida
- Organ Transplantation Centre, National Center for Child Health and Development, Tokyo, Japan
| | - Vidyadhar Mali
- Department of Paediatric Surgery, National University Hospital, Singapore
| | - Marion Aw
- Department of Paediatrics, National University Hospital, Singapore
| | | | - Emmanuel Gonzales
- Paediatric Hepatology and Paediatric Liver Transplantation Unit, Hôpital Bicêtre, Paris, France
| | - Florent Guérin
- Paediatric Surgery and Paediatric Liver Transplantation Unit, Hôpital Bicêtre, Paris, France
| | - Guillermo Cervio
- Division of Liver Transplant, Hospital de Pediatría Prof Dr Juan P Garrahan, Buenos Aires, Argentina
| | - Julia Minetto
- Division of Liver Transplant, Hospital de Pediatría Prof Dr Juan P Garrahan, Buenos Aires, Argentina
| | - Sergio Sierre
- Division of Interventional Radiology, Hospital de Pediatría Prof Dr Juan P Garrahan, Buenos Aires, Argentina
| | - Martin de Santibañes
- HPB and Liver Transplant Unit, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Victoria Ardiles
- HPB and Liver Transplant Unit, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Jimmy Walker Uno
- HPB and Liver Transplant Unit, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Helen Evans
- Department of Paediatric Gastroenterology, Starship Children's Health, Auckland, New Zealand
| | - David Duncan
- Department of Paediatric Radiology, Starship Children's Health, Auckland, New Zealand
| | - John McCall
- Liver Transplant Unit, Starship Children's Health, Auckland, New Zealand
| | - Steffen Hartleif
- Paediatric Gastroenterology and Hepatology, University Hospitals Tubingen, Tubingen, Germany
| | - Ekkehard Sturm
- Paediatric Gastroenterology and Hepatology, University Hospitals Tubingen, Tubingen, Germany
| | - Jai Patel
- Department of Radiology, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - Marumbo Mtegha
- Department of Paediatrics, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - Raj Prasad
- Department of Surgery and Transplantation, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | | | - Luiza S Nader
- Department of Paediatrics, Hospital Santo Antonio, Porto Alegre, Brazil
| | - Marco Farina
- Department of Paediatrics, Hospital Santo Antonio, Porto Alegre, Brazil
| | - Catalina Jaramillo
- Department of Paediatrics, Division of Paediatric Gastroenterology, Hepatology and Nutrition, The University of Utah School of Medicine, Salt Lake City, Utah, USA
| | | | - Peter Feola
- Paediatric Interventional Radiology, The University of Utah School of Medicine, Salt Lake City, Utah, USA
| | - Amit A Shah
- Division of Gastroenterology, Hepatology and Nutrition, Department of Paediatrics, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Phoebe M Wood
- Division of Gastroenterology, Hepatology and Nutrition, Department of Paediatrics, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Michael R Acord
- Department of Radiology, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Ryan T Fischer
- Division of Paediatric Gastroenterology and Hepatology, Department of Paediatrics, Children's Mercy Hospital Kansas, Overland Park, Kansas, USA
| | - Bhargava Mullapudi
- Department of Paediatric Surgery, Children's Mercy Hospital Kansas, Overland Park, Kansas, USA
| | - Richard J Hendrickson
- Department of Paediatric Surgery, Children's Mercy Hospital Kansas, Overland Park, Kansas, USA
| | - Rajeev Khanna
- Department of Paediatric Hepatology, Institute of Liver and Biliary Sciences, New Delhi, Delhi, India
| | - Viniyendra Pamecha
- Department Hepatobiliary Surgery and Liver transplantation, Institute of Liver and Biliary Sciences, New Delhi, Delhi, India
| | - Amar Mukund
- Department of Interventional Radiology, Institute of Liver and Biliary Sciences, New Delhi, Delhi, India
| | - Khalid Sharif
- Liver Unit, Birmingham Women's and Children's Hospitals NHS Foundation Trust, Birmingham, UK
| | - Girish Gupte
- Liver Unit, Birmingham Women's and Children's Hospitals NHS Foundation Trust, Birmingham, UK
| | - Simon McGuirk
- Department of Interventional Radiology, Birmingham Women's and Children's Hospitals NHS Foundation Trust, Birmingham, UK
| | - Gilda Porta
- Department of Paediatric Hepatology, Hospital Sírio-Libanês, Sao Paulo, Brazil
| | - Marco Spada
- Division of Abdominal Transplantation and Hepatobiliopancreatic Surgery, Ospedale Pediatrico Bambino Gesu, Roma, Italy
| | - Tommaso Alterio
- Gastrointestinal, Liver, Nutrition Disorders Unit, IRCCS Pediatric Hospital Bambino Gesù, Rome, Italy
| | - Giuseppe Maggiore
- Gastrointestinal, Liver, Nutrition Disorders Unit, IRCCS Pediatric Hospital Bambino Gesù, Rome, Italy
| | - Winita Hardikar
- Department of Pediatrics, Royal Children's Hospital Research Institute, Parkville, Victoria, Australia
| | - Marisa Beretta
- Faculty of Health Sciences, Wits Donald Gordon Medical Centre, Johannesburg, South Africa
| | - Rudi Dierckx
- Department of Radiology, Medical Imaging Center, University Medical Centre Groningen, Groningen, The Netherlands
| | - Ruben H J de Kleine
- Division of Hepatobiliary Surgery & Liver Transplantation, Department of Surgery, University Medical Centre Groningen, Groningen, The Netherlands
| | - Reinoud P H Bokkers
- Department of Radiology, Medical Imaging Center, University Medical Centre Groningen, Groningen, The Netherlands
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Hoşnut FÖ, Janecke AR, Şahin G, Vogel GF, Lafcı NG, Bichler P, Müller T, Huber LA, Valovka T, Aksu AÜ. SLC5A1 Variants in Turkish Patients with Congenital Glucose-Galactose Malabsorption. Genes (Basel) 2023; 14:1359. [PMID: 37510265 PMCID: PMC10379334 DOI: 10.3390/genes14071359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 06/02/2023] [Accepted: 06/20/2023] [Indexed: 07/30/2023] Open
Abstract
Congenital glucose-galactose malabsorption is a rare autosomal recessive disorder caused by mutations in SLC5A1 encoding the apical sodium/glucose cotransporter SGLT1. We present clinical and molecular data from eleven affected individuals with congenital glucose-galactose malabsorption from four unrelated, consanguineous Turkish families. Early recognition and timely management by eliminating glucose and galactose from the diet are fundamental for affected individuals to survive and develop normally. We identified novel SLC5A1 missense variants, p.Gly43Arg and p.Ala92Val, which were linked to disease in two families. Stable expression in CaCo-2 cells showed that the p.Ala92Val variant did not reach the plasma membrane, but was retained in the endoplasmic reticulum. The p.Gly43Arg variant, however, displayed processing and plasma membrane localization comparable to wild-type SGLT1. Glycine-43 displays nearly invariant conservation in the relevant structural family of cotransporters and exchangers, and localizes to SGLT1 transmembrane domain TM0. p.Gly43Arg represents the first disease-associated variant in TM0; however, the role of TM0 in the SGLT1 function has not been established. In summary, we are expanding the mutational spectrum of this rare disorder.
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Affiliation(s)
- Ferda Ö. Hoşnut
- Department of Pediatric Gastroenterology, Hepatology and Nutrition, Dr. Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, University of Health Sciences, 06080 Ankara, Turkey
| | - Andreas R. Janecke
- Department of Pediatrics I, Medical University of Innsbruck, 6020 Innsbruck, Austria (T.V.)
- Institute of Human Genetics, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Gülseren Şahin
- Department of Pediatric Gastroenterology, Hepatology and Nutrition, Dr. Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, University of Health Sciences, 06080 Ankara, Turkey
| | - Georg F. Vogel
- Department of Pediatrics I, Medical University of Innsbruck, 6020 Innsbruck, Austria (T.V.)
- Institute of Cell Biology, Biocenter, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Naz G. Lafcı
- Department of Medical Genetics, Faculty of Medicine, Hacettepe University, 06230 Ankara, Turkey
- Department of Medical Genetics, Dr. Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, University of Health Sciences, 06080 Ankara, Turkey
| | - Paul Bichler
- Department of Pediatrics I, Medical University of Innsbruck, 6020 Innsbruck, Austria (T.V.)
- Institute of Cell Biology, Biocenter, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Thomas Müller
- Department of Pediatrics I, Medical University of Innsbruck, 6020 Innsbruck, Austria (T.V.)
| | - Lukas A. Huber
- Institute of Cell Biology, Biocenter, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Taras Valovka
- Department of Pediatrics I, Medical University of Innsbruck, 6020 Innsbruck, Austria (T.V.)
- Institute of Cell Biology, Biocenter, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Aysel Ü. Aksu
- Department of Pediatric Gastroenterology, Hepatology and Nutrition, Ankara Bilkent Hospital, University of Health Sciences, 06800 Ankara, Turkey;
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Waldner B, Aldrian D, Zöggeler T, Oberacher H, Oberhuber R, Schneeberger S, Messner F, Schneider AM, Kohlmaier B, Lanzersdorfer R, Huber WD, Entenmann A, Müller T, Vogel GF. The influence of liver transplantation on the interplay between gut microbiome and bile acid homeostasis in children with biliary atresia. Hepatol Commun 2023; 7:02009842-202306010-00002. [PMID: 37184522 DOI: 10.1097/hc9.0000000000000151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 02/18/2023] [Indexed: 05/16/2023] Open
Abstract
BACKGROUND Biliary atresia (BA) causes neonatal cholestasis and rapidly progresses into cirrhosis if left untreated. Kasai portoenterostomy may delay cirrhosis. BA remains among the most common indications for liver transplantation (LT) during childhood. Liver function and gut microbiome are interconnected. Disturbed liver function and enterohepatic signaling influence microbial diversity. We, herein, investigate the impact of LT and reestablishment of bile flow on gut microbiome-bile acid homeostasis in children with BA before (pre, n = 10), 3 months (post3m, n = 12), 12 months (post12m, n = 9), and more than 24 months (post24 + m, n = 12) after LT. METHODS We analyzed the intestinal microbiome of BA patients before and after LT by 16S-rRNA-sequencing and bioinformatics analyses, and serum primary and secondary bile acid levels. RESULTS The gut microbiome in BA patients exhibits a markedly reduced alpha diversity in pre (p = 0.015) and post3m group (p = 0.044), and approximated healthy control groups at later timepoints post12m (p = 1.0) and post24 + m (p = 0.74). Beta diversity analysis showed overall community structure similarities of pre and post3m (p = 0.675), but both differed from the post24 + m (p < 0.001). Longitudinal analysis of the composition of the gut microbiome revealed the Klebsiella genus to show increased abundance in the post24 + m group compared with an age-matched control (p = 0.029). Secondary bile acid production increased 2+ years after LT (p = 0.03). Multivariable associations of microbial communities and clinical metadata reveal several significant associations of microbial genera with tacrolimus and mycophenolate mofetil-based immunosuppressive regimens. CONCLUSIONS In children with BA, the gut microbiome shows strongly reduced diversity before and shortly after LT, and approximates healthy controls at later timepoints. Changes in diversity correlate with altered secondary bile acid synthesis at 2+ years and with the selection of different immunosuppressants.
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Affiliation(s)
- Birgit Waldner
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Denise Aldrian
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Thomas Zöggeler
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Herbert Oberacher
- Institute of Legal Medicine and Core Facility Metabolomics, Medical University of Innsbruck, Innsbruck, Austria
| | - Rupert Oberhuber
- Department of Transplant Surgery, Medical University of Innsbruck, Innsbruck, Austria
| | - Stefan Schneeberger
- Department of Transplant Surgery, Medical University of Innsbruck, Innsbruck, Austria
| | - Franka Messner
- Department of Transplant Surgery, Medical University of Innsbruck, Innsbruck, Austria
| | - Anna M Schneider
- Department of Pediatrics, Salzburger Landeskliniken and Paracelsus Medical University, Salzburg, Austria
| | - Benno Kohlmaier
- Department of General Paediatrics, Medical University of Graz, Graz, Austria
| | - Roland Lanzersdorfer
- Department of Paediatrics and Adolescent Medicine, Johannes Keppler University Linz, Linz, Austria
| | - Wolf-Dietrich Huber
- Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Vienna, Austria
| | - Andreas Entenmann
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Thomas Müller
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Georg F Vogel
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
- Institute of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
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8
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Vogel GF, Mozer-Glassberg Y, Landau YE, Schlieben LD, Prokisch H, Feichtinger RG, Mayr JA, Brennenstuhl H, Schröter J, Pechlaner A, Alkuraya FS, Baker JJ, Barcia G, Baric I, Braverman N, Burnyte B, Christodoulou J, Ciara E, Coman D, Das AM, Darin N, Della Marina A, Distelmaier F, Eklund EA, Ersoy M, Fang W, Gaignard P, Ganetzky RD, Gonzales E, Howard C, Hughes J, Konstantopoulou V, Kose M, Kerr M, Khan A, Lenz D, McFarland R, Margolis MG, Morrison K, Müller T, Murayama K, Nicastro E, Pennisi A, Peters H, Piekutowska-Abramczuk D, Rötig A, Santer R, Scaglia F, Schiff M, Shagrani M, Sharrard M, Soler-Alfonso C, Staufner C, Storey I, Stormon M, Taylor RW, Thorburn DR, Teles EL, Wang JS, Weghuber D, Wortmannd S. Genotypic and phenotypic spectrum of infantile liver failure due to pathogenic TRMU variants. Genet Med 2023; 25:100828. [PMID: 37272928 DOI: 10.1016/j.gim.2023.100828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023] Open
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9
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Gollmann-Tepeköylü C, Graber M, Hirsch J, Mair S, Naschberger A, Pölzl L, Nägele F, Kirchmair E, Degenhart G, Demetz E, Hilbe R, Chen HY, Engert JC, Böhm A, Franz N, Lobenwein D, Lener D, Fuchs C, Weihs A, Töchterle S, Vogel GF, Schweiger V, Eder J, Pietschmann P, Seifert M, Kronenberg F, Coassin S, Blumer M, Hackl H, Meyer D, Feuchtner G, Kirchmair R, Troppmair J, Krane M, Weiss G, Tsimikas S, Thanassoulis G, Grimm M, Rupp B, Huber LA, Zhang SY, Casanova JL, Tancevski I, Holfeld J. Toll-Like Receptor 3 Mediates Aortic Stenosis Through a Conserved Mechanism of Calcification. Circulation 2023; 147:1518-1533. [PMID: 37013819 DOI: 10.1161/circulationaha.122.063481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
Abstract
BACKGROUND Calcific aortic valve disease (CAVD) is characterized by a phenotypic switch of valvular interstitial cells to bone-forming cells. Toll-like receptors (TLRs) are evolutionarily conserved pattern recognition receptors at the interface between innate immunity and tissue repair. Type I interferons (IFNs) are not only crucial for an adequate antiviral response but also implicated in bone formation. We hypothesized that the accumulation of endogenous TLR3 ligands in the valvular leaflets may promote the generation of osteoblast-like cells through enhanced type I IFN signaling. METHODS Human valvular interstitial cells isolated from aortic valves were challenged with mechanical strain or synthetic TLR3 agonists and analyzed for bone formation, gene expression profiles, and IFN signaling pathways. Different inhibitors were used to delineate the engaged signaling pathways. Moreover, we screened a variety of potential lipids and proteoglycans known to accumulate in CAVD lesions as potential TLR3 ligands. Ligand-receptor interactions were characterized by in silico modeling and verified through immunoprecipitation experiments. Biglycan (Bgn), Tlr3, and IFN-α/β receptor alpha chain (Ifnar1)-deficient mice and a specific zebrafish model were used to study the implication of the byglycan (BGN)-TLR3-IFN axis in both CAVD and bone formation in vivo. Two large-scale cohorts (GERA [Genetic Epidemiology Research on Adult Health and Aging], n=55 192 with 3469 aortic stenosis cases; UK Biobank, n=257 231 with 2213 aortic stenosis cases) were examined for genetic variation at genes implicated in BGN-TLR3-IFN signaling associating with CAVD in humans. RESULTS Here, we identify TLR3 as a central molecular regulator of calcification in valvular interstitial cells and unravel BGN as a new endogenous agonist of TLR3. Posttranslational BGN maturation by xylosyltransferase 1 (XYLT1) is required for TLR3 activation. Moreover, BGN induces the transdifferentiation of valvular interstitial cells into bone-forming osteoblasts through the TLR3-dependent induction of type I IFNs. It is intriguing that Bgn-/-, Tlr3-/-, and Ifnar1-/- mice are protected against CAVD and display impaired bone formation. Meta-analysis of 2 large-scale cohorts with >300 000 individuals reveals that genetic variation at loci relevant to the XYLT1-BGN-TLR3-interferon-α/β receptor alpha chain (IFNAR) 1 pathway is associated with CAVD in humans. CONCLUSIONS This study identifies the BGN-TLR3-IFNAR1 axis as an evolutionarily conserved pathway governing calcification of the aortic valve and reveals a potential therapeutic target to prevent CAVD.
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Affiliation(s)
- Can Gollmann-Tepeköylü
- Department of Cardiac Surgery, Medical University of Innsbruck, Austria. (C.G.-T., M.G, J.H., S.M., L.P., F.N., E.K., N.F., D. Lobenwein, V.S., J.E., M.G., J.H.)
| | - Michael Graber
- Department of Cardiac Surgery, Medical University of Innsbruck, Austria. (C.G.-T., M.G, J.H., S.M., L.P., F.N., E.K., N.F., D. Lobenwein, V.S., J.E., M.G., J.H.)
| | - Jakob Hirsch
- Department of Cardiac Surgery, Medical University of Innsbruck, Austria. (C.G.-T., M.G, J.H., S.M., L.P., F.N., E.K., N.F., D. Lobenwein, V.S., J.E., M.G., J.H.)
| | - Sophia Mair
- Department of Cardiac Surgery, Medical University of Innsbruck, Austria. (C.G.-T., M.G, J.H., S.M., L.P., F.N., E.K., N.F., D. Lobenwein, V.S., J.E., M.G., J.H.)
| | - Andreas Naschberger
- Institute of Genetic Epidemiology, Department of Genetics and Pharmacology, Medical University of Innsbruck, Austria. (A.N., F.K., S.C., B.R.)
- Division of Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal4 Saudi Arabia (A.N.)
| | - Leo Pölzl
- Department of Cardiac Surgery, Medical University of Innsbruck, Austria. (C.G.-T., M.G, J.H., S.M., L.P., F.N., E.K., N.F., D. Lobenwein, V.S., J.E., M.G., J.H.)
| | - Felix Nägele
- Department of Cardiac Surgery, Medical University of Innsbruck, Austria. (C.G.-T., M.G, J.H., S.M., L.P., F.N., E.K., N.F., D. Lobenwein, V.S., J.E., M.G., J.H.)
| | - Elke Kirchmair
- Department of Cardiac Surgery, Medical University of Innsbruck, Austria. (C.G.-T., M.G, J.H., S.M., L.P., F.N., E.K., N.F., D. Lobenwein, V.S., J.E., M.G., J.H.)
| | - Gerald Degenhart
- Department of Radiology, Core Facility for Micro-CT, Medical University of Innsbruck, Austria. (G.D., G..F.)
| | - Egon Demetz
- Department of Internal Medicine III, Medical University of Innsbruck, Austria. (E.D., R.H., A.B., D. Lener, M.S., R.K., G.W., I.T.)
| | - Richard Hilbe
- Department of Internal Medicine III, Medical University of Innsbruck, Austria. (E.D., R.H., A.B., D. Lener, M.S., R.K., G.W., I.T.)
| | - Hao-Yu Chen
- Preventive and Genomic Cardiology, McGill University Health Centre Research Institute, Montreal, Quebec, Canada (J.C.E., H.-Y.C., G.T.)
| | - James C Engert
- Preventive and Genomic Cardiology, McGill University Health Centre Research Institute, Montreal, Quebec, Canada (J.C.E., H.-Y.C., G.T.)
| | - Anna Böhm
- Department of Internal Medicine III, Medical University of Innsbruck, Austria. (E.D., R.H., A.B., D. Lener, M.S., R.K., G.W., I.T.)
| | - Nadja Franz
- Department of Cardiac Surgery, Medical University of Innsbruck, Austria. (C.G.-T., M.G, J.H., S.M., L.P., F.N., E.K., N.F., D. Lobenwein, V.S., J.E., M.G., J.H.)
| | - Daniela Lobenwein
- Department of Cardiac Surgery, Medical University of Innsbruck, Austria. (C.G.-T., M.G, J.H., S.M., L.P., F.N., E.K., N.F., D. Lobenwein, V.S., J.E., M.G., J.H.)
| | - Daniela Lener
- Department of Internal Medicine III, Medical University of Innsbruck, Austria. (E.D., R.H., A.B., D. Lener, M.S., R.K., G.W., I.T.)
| | - Christiane Fuchs
- Department Life Science Engineering, University of Applied Sciences Technikum Wien, Vienna, Austria. (C.F., A.W.)
| | - Anna Weihs
- Department Life Science Engineering, University of Applied Sciences Technikum Wien, Vienna, Austria. (C.F., A.W.)
| | - Sonja Töchterle
- Institute of Molecular Biology/CMBI, University of Innsbruck, Austria. (S.T., D.M.)
| | - Georg F Vogel
- Department of Pediatrics/Institute of Cell Biology, Medical University of Innsbruck, Austria. (G.V.F.)
| | - Victor Schweiger
- Department of Cardiac Surgery, Medical University of Innsbruck, Austria. (C.G.-T., M.G, J.H., S.M., L.P., F.N., E.K., N.F., D. Lobenwein, V.S., J.E., M.G., J.H.)
| | - Jonas Eder
- Department of Cardiac Surgery, Medical University of Innsbruck, Austria. (C.G.-T., M.G, J.H., S.M., L.P., F.N., E.K., N.F., D. Lobenwein, V.S., J.E., M.G., J.H.)
| | - Peter Pietschmann
- Division of Cellular and Molecular Pathophysiology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Austria (P.P.)
| | - Markus Seifert
- Department of Internal Medicine III, Medical University of Innsbruck, Austria. (E.D., R.H., A.B., D. Lener, M.S., R.K., G.W., I.T.)
| | - Florian Kronenberg
- Institute of Genetic Epidemiology, Department of Genetics and Pharmacology, Medical University of Innsbruck, Austria. (A.N., F.K., S.C., B.R.)
| | - Stefan Coassin
- Institute of Genetic Epidemiology, Department of Genetics and Pharmacology, Medical University of Innsbruck, Austria. (A.N., F.K., S.C., B.R.)
| | - Michael Blumer
- Institute of Clinical and Functional Anatomy, Innsbruck Medical University, Austria (M.B.)
| | - Hubert Hackl
- Institute of Bioinformatics, Medical University of Innsbruck, Austria. (H.H.)
| | - Dirk Meyer
- Institute of Molecular Biology/CMBI, University of Innsbruck, Austria. (S.T., D.M.)
| | - Gudrun Feuchtner
- Department of Radiology, Core Facility for Micro-CT, Medical University of Innsbruck, Austria. (G.D., G..F.)
| | - Rudolf Kirchmair
- Department of Internal Medicine III, Medical University of Innsbruck, Austria. (E.D., R.H., A.B., D. Lener, M.S., R.K., G.W., I.T.)
| | - Jakob Troppmair
- Daniel Swarovski Research Laboratory, Department of Visceral, Transplant and Thoracic Surgery, University of Innsbruck, Austria. (J.T.)
| | - Markus Krane
- Department of Cardiovascular Surgery, German Heart Center Munich at the Technical University Munich, Germany (M.K.)
| | - Günther Weiss
- Department of Internal Medicine III, Medical University of Innsbruck, Austria. (E.D., R.H., A.B., D. Lener, M.S., R.K., G.W., I.T.)
| | - Sotirios Tsimikas
- Division of Cardiovascular Diseases, University of California, San Diego, La Jolla (S.T.)
| | - George Thanassoulis
- Preventive and Genomic Cardiology, McGill University Health Centre Research Institute, Montreal, Quebec, Canada (J.C.E., H.-Y.C., G.T.)
| | - Michael Grimm
- Department of Cardiac Surgery, Medical University of Innsbruck, Austria. (C.G.-T., M.G, J.H., S.M., L.P., F.N., E.K., N.F., D. Lobenwein, V.S., J.E., M.G., J.H.)
| | - Bernhard Rupp
- Institute of Genetic Epidemiology, Department of Genetics and Pharmacology, Medical University of Innsbruck, Austria. (A.N., F.K., S.C., B.R.)
| | - Lukas A Huber
- Institute of Cell Biology, Medical University of Innsbruck, Austria. (L.A.H.)
- Austrian Drug Screening Institute, ADSI, Innsbruck (L.A.H.)
| | - Shen-Ying Zhang
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, Rockefeller University, New York, NY (S.-Y.Z., J.-L.C.)
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Necker Hospital for Sick Children, Paris, France (S.-Y.Z., J.-L.C.)
- University of Paris, Imagine Institute, France (S.-Y.Z., J.-L.C.)
| | - Jean-Laurent Casanova
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, Rockefeller University, New York, NY (S.-Y.Z., J.-L.C.)
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Necker Hospital for Sick Children, Paris, France (S.-Y.Z., J.-L.C.)
- University of Paris, Imagine Institute, France (S.-Y.Z., J.-L.C.)
- Howard Hughes Medical Institute, New York, NY (J.-L.C.)
| | - Ivan Tancevski
- Department of Internal Medicine III, Medical University of Innsbruck, Austria. (E.D., R.H., A.B., D. Lener, M.S., R.K., G.W., I.T.)
| | - Johannes Holfeld
- Department of Cardiac Surgery, Medical University of Innsbruck, Austria. (C.G.-T., M.G, J.H., S.M., L.P., F.N., E.K., N.F., D. Lobenwein, V.S., J.E., M.G., J.H.)
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Klee KMC, Hess MW, Lohmüller M, Herzog S, Pfaller K, Müller T, Vogel GF, Huber LA. A CRISPR screen in intestinal epithelial cells identifies novel factors for polarity and apical transport. eLife 2023; 12:e80135. [PMID: 36661306 PMCID: PMC9889089 DOI: 10.7554/elife.80135] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 01/19/2023] [Indexed: 01/21/2023] Open
Abstract
Epithelial polarization and polarized cargo transport are highly coordinated and interdependent processes. In our search for novel regulators of epithelial polarization and protein secretion, we used a genome-wide CRISPR/Cas9 screen and combined it with an assay based on fluorescence-activated cell sorting (FACS) to measure the secretion of the apical brush-border hydrolase dipeptidyl peptidase 4 (DPP4). In this way, we performed the first CRISPR screen to date in human polarized epithelial cells. Using high-resolution microscopy, we detected polarization defects and mislocalization of DPP4 to late endosomes/lysosomes after knockout of TM9SF4, anoctamin 8, and ARHGAP33, confirming the identification of novel factors for epithelial polarization and apical cargo secretion. Thus, we provide a powerful tool suitable for studying polarization and cargo secretion in epithelial cells. In addition, we provide a dataset that serves as a resource for the study of novel mechanisms for epithelial polarization and polarized transport and facilitates the investigation of novel congenital diseases associated with these processes.
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Affiliation(s)
- Katharina MC Klee
- Institute of Cell Biology, Medical University of InnsbruckInnsbruckAustria
- Institute of Histology and Embryology, Medical University of InnsbruckInnsbruckAustria
| | - Michael W Hess
- Institute of Histology and Embryology, Medical University of InnsbruckInnsbruckAustria
| | - Michael Lohmüller
- Institute of Developmental Immunology, Medical University of InnsbruckInnsbruckAustria
| | - Sebastian Herzog
- Institute of Developmental Immunology, Medical University of InnsbruckInnsbruckAustria
| | - Kristian Pfaller
- Institute of Histology and Embryology, Medical University of InnsbruckInnsbruckAustria
| | - Thomas Müller
- Department of Paediatrics I, Medical University of InnsbruckInnsbruckAustria
| | - Georg F Vogel
- Institute of Cell Biology, Medical University of InnsbruckInnsbruckAustria
- Department of Paediatrics I, Medical University of InnsbruckInnsbruckAustria
| | - Lukas A Huber
- Institute of Cell Biology, Medical University of InnsbruckInnsbruckAustria
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11
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Kavallar AM, Messner F, Scheidl S, Oberhuber R, Schneeberger S, Aldrian D, Berchtold V, Sanal M, Entenmann A, Straub S, Gasser A, Janecke AR, Müller T, Vogel GF. Internal Ileal Diversion as Treatment for Progressive Familial Intrahepatic Cholestasis Type 1-Associated Graft Inflammation and Steatosis after Liver Transplantation. Children (Basel) 2022; 9:children9121964. [PMID: 36553407 PMCID: PMC9777440 DOI: 10.3390/children9121964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 12/07/2022] [Accepted: 12/12/2022] [Indexed: 12/16/2022]
Abstract
BACKGROUND Progressive Familial Intrahepatic cholestasis type I (PFIC1) is a rare congenital hepatopathy causing cholestasis with progressive liver disease. Surgical interruption of the enterohepatic circulation, e.g., surgical biliary diversion (SBD) can slow down development of liver cirrhosis. Eventually, end stage liver disease necessitates liver transplantation (LT). PFIC1 patients might develop diarrhea, graft steatosis and inflammation after LT. SBD after LT was shown to be effective in the alleviation of liver steatosis and graft injury. CASE REPORT Three PFIC1 patients received LT at the ages of two, two and a half and five years. Shortly after LT diarrhea and graft steatosis was recognized, SBD to the terminal ileum was opted to prevent risk for ascending cholangitis. After SBD, inflammation and steatosis was found to be reduced to resolved, as seen by liver biochemistry and ultrasounds. Diarrhea was reported unchanged. CONCLUSION We present three PFIC1 cases for whom SBD to the terminal ileum successfully helped to resolve graft inflammation and steatosis.
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Affiliation(s)
- Anna M. Kavallar
- Department of Paediatrics I, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Franka Messner
- Department of Visceral, Transplant and Thoracic Surgery, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Stefan Scheidl
- Department of Visceral, Transplant and Thoracic Surgery, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Rupert Oberhuber
- Department of Visceral, Transplant and Thoracic Surgery, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Stefan Schneeberger
- Department of Visceral, Transplant and Thoracic Surgery, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Denise Aldrian
- Department of Paediatrics I, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Valeria Berchtold
- Department of Visceral, Transplant and Thoracic Surgery, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Murat Sanal
- Department of Visceral, Transplant and Thoracic Surgery, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Andreas Entenmann
- Department of Paediatrics I, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Simon Straub
- Department of Paediatrics I, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Anna Gasser
- Department of Paediatrics I, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Andreas R. Janecke
- Department of Paediatrics I, Medical University of Innsbruck, 6020 Innsbruck, Austria
- Institute of Human Genetics, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Thomas Müller
- Department of Paediatrics I, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Georg F. Vogel
- Department of Paediatrics I, Medical University of Innsbruck, 6020 Innsbruck, Austria
- Institute of Cell Biology, Biocenter, Medical University of Innsbruck, 6020 Innsbruck, Austria
- Correspondence: ; Tel.: +43-(0)-512-504-23501; Fax: +43-(0)-512-504-23491
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12
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Vogel GF, Mozer-Glassberg Y, Landau YE, Schlieben LD, Prokisch H, Feichtinger RG, Mayr JA, Brennenstuhl H, Schröter J, Pechlaner A, Alkuraya FS, Baker JJ, Barcia G, Baric I, Braverman N, Burnyte B, Christodoulou J, Ciara E, Coman D, Das AM, Darin N, Della Marina A, Distelmaier F, Eklund EA, Ersoy M, Fang W, Gaignard P, Ganetzky RD, Gonzales E, Howard C, Hughes J, Konstantopoulou V, Kose M, Kerr M, Khan A, Lenz D, McFarland R, Margolis MG, Morrison K, Müller T, Murayama K, Nicastro E, Pennisi A, Peters H, Piekutowska-Abramczuk D, Rötig A, Santer R, Scaglia F, Schiff M, Shagrani M, Sharrard M, Soler-Alfonso C, Staufner C, Storey I, Stormon M, Taylor RW, Thorburn DR, Teles EL, Wang JS, Weghuber D, Wortmann S. Genotypic and phenotypic spectrum of infantile liver failure due to pathogenic TRMU variants. Genet Med 2022:S1098-3600(22)00953-4. [DOI: 10.1016/j.gim.2022.09.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 09/27/2022] [Accepted: 09/28/2022] [Indexed: 11/06/2022] Open
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13
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Duclaux-Loras R, Lebreton C, Berthelet J, Charbit-Henrion F, Nicolle O, Revenu de Courtils C, Waich S, Valovka T, Khiat A, Rabant M, Racine C, Guerrera IC, Baptista J, Mahe MM, Hess MW, Durel B, Lefort N, Banal C, Parisot M, Talbotec C, Lacaille F, Ecochard-Dugelay E, Demir AM, Vogel GF, Faivre L, Rodrigues A, Fowler D, Janecke AR, Müller T, Huber LA, Rodrigues-Lima F, Ruemmele FM, Uhlig HH, Del Bene F, Michaux G, Cerf-Bensussan N, Parlato M. UNC45A deficiency causes microvillus inclusion disease-like phenotype by impairing myosin VB-dependent apical trafficking. J Clin Invest 2022; 132:154997. [PMID: 35575086 PMCID: PMC9106349 DOI: 10.1172/jci154997] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 03/29/2022] [Indexed: 01/03/2023] Open
Abstract
Variants in the UNC45A cochaperone have been recently associated with a syndrome combining diarrhea, cholestasis, deafness, and bone fragility. Yet the mechanism underlying intestinal failure in UNC45A deficiency remains unclear. Here, biallelic variants in UNC45A were identified by next-generation sequencing in 6 patients with congenital diarrhea. Corroborating in silico prediction, variants either abolished UNC45A expression or altered protein conformation. Myosin VB was identified by mass spectrometry as client of the UNC45A chaperone and was found misfolded in UNC45AKO Caco-2 cells. In keeping with impaired myosin VB function, UNC45AKO Caco-2 cells showed abnormal epithelial morphogenesis that was restored by full-length UNC45A, but not by mutant alleles. Patients and UNC45AKO 3D organoids displayed altered luminal development and microvillus inclusions, while 2D cultures revealed Rab11 and apical transporter mislocalization as well as sparse and disorganized microvilli. All those features resembled the subcellular abnormalities observed in duodenal biopsies from patients with microvillus inclusion disease. Finally, microvillus inclusions and shortened microvilli were evidenced in enterocytes from unc45a-deficient zebrafish. Taken together, our results provide evidence that UNC45A plays an essential role in epithelial morphogenesis through its cochaperone function of myosin VB and that UNC45A loss causes a variant of microvillus inclusion disease.
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Affiliation(s)
- Rémi Duclaux-Loras
- Université Paris Cité, Imagine Institute, Laboratory of Intestinal Immunity, INSERM, UMR1163, Paris, France
- Department of Pediatric Gastroenterology, Assistance Publique-Hopitaux de Paris, Hopital Necker–Enfants Malades, F-75015, Paris, France
| | - Corinne Lebreton
- Université Paris Cité, Imagine Institute, Laboratory of Intestinal Immunity, INSERM, UMR1163, Paris, France
| | | | - Fabienne Charbit-Henrion
- Université Paris Cité, Imagine Institute, Laboratory of Intestinal Immunity, INSERM, UMR1163, Paris, France
- Department of Pediatric Gastroenterology, Assistance Publique-Hopitaux de Paris, Hopital Necker–Enfants Malades, F-75015, Paris, France
| | - Ophelie Nicolle
- Université de Rennes, CNRS, Institut de Génétique et Développement de Rennes (IGDR)–UMR 6290, Rennes, France
| | - Céline Revenu de Courtils
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
- Institut Curie, PSL Research University, INSERM U934, CNRS UMR3215, Paris, France
| | - Stephanie Waich
- Universitätsklinik für Pädiatrie I and
- Institute of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Taras Valovka
- Universitätsklinik für Pädiatrie I and
- Institute of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Anis Khiat
- Université Paris Cité, Imagine Institute, Laboratory of Intestinal Immunity, INSERM, UMR1163, Paris, France
| | - Marion Rabant
- Department of Pathology, Assistance Publique–Hopitaux de Paris, Hopital Necker–Enfants Malades, Paris, France
| | - Caroline Racine
- Centre de Référence Anomalies du Développement et Syndromes Malformatifs, Fédération Hospitalo–Universitaire Médecine Translationnelle et Anomalies du Développement (TRANSLAD), Centre Hospitalier Universitaire, and Equipe GAD, Université de Bourgogne Franche-Comté, Faculté de Médecine, INSERM LNC UMR 1231, Dijon, France
| | - Ida Chiara Guerrera
- Proteomics Platform 3P5-Necker, Université Paris Descartes-Structure Fédérative de Recherche Necker, INSERM US24/CNRS UMS3633, Paris, France
| | - Júlia Baptista
- Peninsula Medical School, Faculty of Health, University of Plymouth, Plymouth, United Kingdom
- Royal Devon and Exeter NHS Foundation Trust, Exeter, United Kingdom
| | - Maxime M. Mahe
- Université de Nantes, INSERM, TENS, The Enteric Nervous System in Gut and Brain Diseases, IMAD, Nantes, France
| | - Michael W. Hess
- Institut für Histologie und Embryologie Medical University of Innsbruck, Innsbruck, Austria
| | - Béatrice Durel
- Cell Imaging Platform, INSERM-US24-CNRS UMS 3633 Structure Fédérative de Recherche Necker, Université Paris Cité, Paris, France
| | - Nathalie Lefort
- iPS Core Facility, Imagine Institute, INSERM U1163, Paris Descartes University, Paris, France
| | - Céline Banal
- iPS Core Facility, Imagine Institute, INSERM U1163, Paris Descartes University, Paris, France
| | - Mélanie Parisot
- Genomics Core Facility, Institut Imagine–Structure Fédérative de Recherche Necker, INSERM U1163 et INSERM US24/CNRS UMS3633, Paris Descartes Sorbonne Paris Cite University, Paris, France
| | - Cecile Talbotec
- Department of Pediatric Gastroenterology, Assistance Publique-Hopitaux de Paris, Hopital Necker–Enfants Malades, F-75015, Paris, France
| | - Florence Lacaille
- Department of Pediatric Gastroenterology, Assistance Publique-Hopitaux de Paris, Hopital Necker–Enfants Malades, F-75015, Paris, France
| | | | - Arzu Meltem Demir
- Ankara Child Health and Diseases, Training and Research Hospital, Pediatric Gastroenterology, Ankara, Turkey
| | - Georg F. Vogel
- Universitätsklinik für Pädiatrie I and
- Institute of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Laurence Faivre
- Department of Pathology, Assistance Publique–Hopitaux de Paris, Hopital Necker–Enfants Malades, Paris, France
| | | | | | | | | | - Lukas A. Huber
- Institute of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | | | - Frank M. Ruemmele
- Department of Pediatric Gastroenterology, Assistance Publique-Hopitaux de Paris, Hopital Necker–Enfants Malades, F-75015, Paris, France
| | - Holm H. Uhlig
- Translational Gastroenterology Unit and Department of Paediatrics, John Radcliffe Hospital, NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, United Kingdom
| | - Filippo Del Bene
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
- Institut Curie, PSL Research University, INSERM U934, CNRS UMR3215, Paris, France
| | - Grégoire Michaux
- Université de Rennes, CNRS, Institut de Génétique et Développement de Rennes (IGDR)–UMR 6290, Rennes, France
| | - Nadine Cerf-Bensussan
- Université Paris Cité, Imagine Institute, Laboratory of Intestinal Immunity, INSERM, UMR1163, Paris, France
| | - Marianna Parlato
- Université Paris Cité, Imagine Institute, Laboratory of Intestinal Immunity, INSERM, UMR1163, Paris, France
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14
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Demetz E, Tymoszuk P, Hilbe R, Volani C, Haschka D, Heim C, Auer K, Lener D, Zeiger LB, Pfeifhofer-Obermair C, Boehm A, Obermair GJ, Ablinger C, Coassin S, Lamina C, Kager J, Petzer V, Asshoff M, Schroll A, Nairz M, Dichtl S, Seifert M, von Raffay L, Fischer C, Barros-Pinkelnig M, Brigo N, Valente de Souza L, Sopper S, Hirsch J, Graber M, Gollmann-Tepeköylü C, Holfeld J, Halper J, Macheiner S, Gostner J, Vogel GF, Pechlaner R, Moser P, Imboden M, Marques-Vidal P, Probst-Hensch NM, Meiselbach H, Strauch K, Peters A, Paulweber B, Willeit J, Kiechl S, Kronenberg F, Theurl I, Tancevski I, Weiss G. The haemochromatosis gene Hfe and Kupffer cells control LDL cholesterol homeostasis and impact on atherosclerosis development. Eur Heart J 2020; 41:3949-3959. [PMID: 32227235 DOI: 10.1093/eurheartj/ehaa140] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 10/16/2019] [Accepted: 02/18/2020] [Indexed: 12/12/2022] Open
Abstract
AIMS Imbalances of iron metabolism have been linked to the development of atherosclerosis. However, subjects with hereditary haemochromatosis have a lower prevalence of cardiovascular disease. The aim of our study was to understand the underlying mechanisms by combining data from genome-wide association study analyses in humans, CRISPR/Cas9 genome editing, and loss-of-function studies in mice. METHODS AND RESULTS Our analysis of the Global Lipids Genetics Consortium (GLGC) dataset revealed that single nucleotide polymorphisms (SNPs) in the haemochromatosis gene HFE associate with reduced low-density lipoprotein cholesterol (LDL-C) in human plasma. The LDL-C lowering effect could be phenocopied in dyslipidaemic ApoE-/- mice lacking Hfe, which translated into reduced atherosclerosis burden. Mechanistically, we identified HFE as a negative regulator of LDL receptor expression in hepatocytes. Moreover, we uncovered liver-resident Kupffer cells (KCs) as central players in cholesterol homeostasis as they were found to acquire and transfer LDL-derived cholesterol to hepatocytes in an Abca1-dependent fashion, which is controlled by iron availability. CONCLUSION Our results disentangle novel regulatory interactions between iron metabolism, KC biology and cholesterol homeostasis which are promising targets for treating dyslipidaemia but also provide a mechanistic explanation for reduced cardiovascular morbidity in subjects with haemochromatosis.
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Affiliation(s)
- Egon Demetz
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Piotr Tymoszuk
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Richard Hilbe
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Chiara Volani
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - David Haschka
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Christiane Heim
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Kristina Auer
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Daniela Lener
- Department of Internal Medicine III, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Lucas B Zeiger
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Christa Pfeifhofer-Obermair
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Anna Boehm
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Gerald J Obermair
- Department of Physiology and Medical Physics, Medical University of Innsbruck, Fritz-Pregl-Straße 3, 6020 Innsbruck, Austria
- Division of Physiology, Karl Landsteiner University of Health Sciences, Dr.-Karl-Dorrek-Straße 30, 3500 Krems, Austria
| | - Cornelia Ablinger
- Department of Physiology and Medical Physics, Medical University of Innsbruck, Fritz-Pregl-Straße 3, 6020 Innsbruck, Austria
| | - Stefan Coassin
- Department of Genetics and Pharmacology, Institute of Genetic Epidemiology, Medical University of Innsbruck, Schöpfstraße 41, 6020 Innsbruck, Austria
| | - Claudia Lamina
- Department of Genetics and Pharmacology, Institute of Genetic Epidemiology, Medical University of Innsbruck, Schöpfstraße 41, 6020 Innsbruck, Austria
| | - Juliane Kager
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Verena Petzer
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Malte Asshoff
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Andrea Schroll
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Manfred Nairz
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Stefanie Dichtl
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Markus Seifert
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
- Christian Doppler Laboratory for Iron Metabolism and Anemia Research, Medical University of Innsbruck, Innsbruck, Austria
| | - Laura von Raffay
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Christine Fischer
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Marina Barros-Pinkelnig
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Natascha Brigo
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Lara Valente de Souza
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
- Christian Doppler Laboratory for Iron Metabolism and Anemia Research, Medical University of Innsbruck, Innsbruck, Austria
| | - Sieghart Sopper
- Department of Internal Medicine V, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Jakob Hirsch
- Department of Cardiac Surgery, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Michael Graber
- Department of Cardiac Surgery, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Can Gollmann-Tepeköylü
- Department of Cardiac Surgery, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Johannes Holfeld
- Department of Cardiac Surgery, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Julia Halper
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Sophie Macheiner
- Department of Internal Medicine I, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Johanna Gostner
- Division of Medical Biochemistry, Medical University of Innsbruck, Innrain 80/IV, 6020 Innsbruck, Austria
| | - Georg F Vogel
- Department of Pediatrics I, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Raimund Pechlaner
- Department of Neurology, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Patrizia Moser
- Department of Pathology, Innsbruck University Hospital, Anichstraße 35, 6020 Innsbruck, Austria
| | - Medea Imboden
- Swiss Tropical and Public Health Institute, Socinstraße 57, 4051 Basel, Switzerland
- Department of Public Health, University of Basel, Bernoullistraße 28, 4056 Basel, Switzerland
| | - Pedro Marques-Vidal
- Department of Internal Medicine, Lausanne University Hospital, Rue du Bugnon 46, 1011 Lausanne, Switzerland
| | - Nicole M Probst-Hensch
- Swiss Tropical and Public Health Institute, Socinstraße 57, 4051 Basel, Switzerland
- Department of Public Health, University of Basel, Bernoullistraße 28, 4056 Basel, Switzerland
| | - Heike Meiselbach
- Department of Nephrology and Hypertension, University Hospital Erlangen, Maximiliansplatz 2, 91054 Erlangen, Germany
| | - Konstantin Strauch
- Institute of Genetic Epidemiology, Helmholtz Zentrum München-German Research Center for Environmental Health, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany
- Institute of Medical Informatics, Biometry and Epidemiology, Ludwig-Maximilians-Universität, Marchioninistraße 15, 81377 Munich, Germany
| | - Annette Peters
- Institute of Epidemiology II, Helmholtz Zentrum München-German Research Center for Environmental Health, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany
- German Center for Diabetes Research, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany
- German Center for Cardiovascular Research, Lazarettstraße 36, 80636 Munich, Germany
| | - Bernhard Paulweber
- First Department of Medicine, Paracelsus Medical University Salzburg, Strubergasse 21, 5020 Salzburg, Austria
| | - Johann Willeit
- Department of Neurology, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Stefan Kiechl
- Department of Neurology, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Florian Kronenberg
- Department of Genetics and Pharmacology, Institute of Genetic Epidemiology, Medical University of Innsbruck, Schöpfstraße 41, 6020 Innsbruck, Austria
| | - Igor Theurl
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Ivan Tancevski
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Guenter Weiss
- Department of Internal Medicine II, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
- Christian Doppler Laboratory for Iron Metabolism and Anemia Research, Medical University of Innsbruck, Innsbruck, Austria
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15
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Yordanov TE, Hipolito VEB, Liebscher G, Vogel GF, Stasyk T, Herrmann C, Geley S, Teis D, Botelho RJ, Hess MW, Huber LA. Biogenesis of lysosome-related organelles complex-1 (BORC) regulates late endosomal/lysosomal size through PIKfyve-dependent phosphatidylinositol-3,5-bisphosphate. Traffic 2019; 20:674-696. [PMID: 31314175 PMCID: PMC6771566 DOI: 10.1111/tra.12679] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 07/15/2019] [Indexed: 01/02/2023]
Abstract
Mechanisms that control lysosomal function are essential for cellular homeostasis. Lysosomes adapt in size and number to cellular needs but little is known about the underlying molecular mechanism. We demonstrate that the late endosomal/lysosomal multimeric BLOC-1-related complex (BORC) regulates the size of these organelles via PIKfyve-dependent phosphatidylinositol-3,5-bisphosphate [PI(3,5)P2 ] production. Deletion of the core BORC component Diaskedin led to increased levels of PI(3,5)P2 , suggesting activation of PIKfyve, and resulted in enhanced lysosomal reformation and subsequent reduction in lysosomal size. This process required AMP-activated protein kinase (AMPK), a known PIKfyve activator, and was additionally dependent on the late endosomal/lysosomal adaptor, mitogen-activated protein kinases and mechanistic target of rapamycin activator (LAMTOR/Ragulator) complex. Consistently, in response to glucose limitation, AMPK activated PIKfyve, which induced lysosomal reformation with increased baseline autophagy and was coupled to a decrease in lysosomal size. These adaptations of the late endosomal/lysosomal system reversed under glucose replete growth conditions. In summary, our results demonstrate that BORC regulates lysosomal reformation and size in response to glucose availability.
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Affiliation(s)
- Teodor E. Yordanov
- Division of Cell Biology, BiocenterMedical University of InnsbruckInnsbruckAustria
| | - Victoria E. B. Hipolito
- Department of Chemistry and Biology and the Graduate Program in Molecular ScienceRyerson UniversityTorontoOntarioCanada
| | - Gudrun Liebscher
- Division of Cell Biology, BiocenterMedical University of InnsbruckInnsbruckAustria
| | - Georg F. Vogel
- Division of Cell Biology, BiocenterMedical University of InnsbruckInnsbruckAustria
- Department of Pediatrics IMedical University of InnsbruckInnsbruckAustria
| | - Taras Stasyk
- Division of Cell Biology, BiocenterMedical University of InnsbruckInnsbruckAustria
| | - Caroline Herrmann
- Division of Cell Biology, BiocenterMedical University of InnsbruckInnsbruckAustria
| | - Stephan Geley
- Division of Molecular Pathophysiology, BiocenterMedical University of InnsbruckInnsbruckAustria
| | - David Teis
- Division of Cell Biology, BiocenterMedical University of InnsbruckInnsbruckAustria
| | - Roberto J. Botelho
- Department of Chemistry and Biology and the Graduate Program in Molecular ScienceRyerson UniversityTorontoOntarioCanada
| | - Michael W. Hess
- Division of Histology and EmbryologyMedical University of InnsbruckInnsbruckAustria
| | - Lukas A. Huber
- Division of Cell Biology, BiocenterMedical University of InnsbruckInnsbruckAustria
- Austrian Drug Screening Institute, ADSIInnsbruckAustria
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16
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Hess MW, Vogel GF, Yordanov TE, Witting B, Gutleben K, Ebner HL, de Araujo MEG, Filipek PA, Huber LA. Combining high-pressure freezing with pre-embedding immunogold electron microscopy and tomography. Traffic 2018; 19:639-649. [PMID: 29673018 DOI: 10.1111/tra.12575] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 04/13/2018] [Accepted: 04/13/2018] [Indexed: 12/11/2022]
Abstract
Immunogold labeling of permeabilized whole-mount cells or thin-sectioned material is widely used for the subcellular localization of biomolecules at the high spatial resolution of electron microscopy (EM). Those approaches are well compatible with either 3-dimensional (3D) reconstruction of organelle morphology and antigen distribution or with rapid cryofixation-but not easily with both at once. We describe here a specimen preparation and labeling protocol for animal cell cultures, which represents a novel blend of specifically adapted versions of established techniques. It combines the virtues of reliably preserved organelle ultrastructure, as trapped by rapid freezing within milliseconds followed by freeze-substitution and specimen rehydration, with the advantages of robust labeling of intracellular constituents in 3D through means of pre-embedding NANOGOLD-silver immunocytochemistry. So obtained thin and semi-thick epoxy resin sections are suitable for transmission EM imaging, as well as tomographic reconstruction and modeling of labeling patterns in the 3D cellular context.
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Affiliation(s)
- Michael W Hess
- Division of Histology and Embryology, Medical University of Innsbruck, Innsbruck, Austria
| | - Georg F Vogel
- Division of Histology and Embryology, Medical University of Innsbruck, Innsbruck, Austria.,Division of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria.,Department of Pediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Teodor E Yordanov
- Division of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Barbara Witting
- Division of Histology and Embryology, Medical University of Innsbruck, Innsbruck, Austria
| | - Karin Gutleben
- Division of Histology and Embryology, Medical University of Innsbruck, Innsbruck, Austria
| | - Hannes L Ebner
- Division of Histology and Embryology, Medical University of Innsbruck, Innsbruck, Austria
| | - Mariana E G de Araujo
- Division of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Przemyslaw A Filipek
- Division of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Lukas A Huber
- Division of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
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17
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Adell MAY, Migliano SM, Upadhyayula S, Bykov YS, Sprenger S, Pakdel M, Vogel GF, Jih G, Skillern W, Behrouzi R, Babst M, Schmidt O, Hess MW, Briggs JA, Kirchhausen T, Teis D. Recruitment dynamics of ESCRT-III and Vps4 to endosomes and implications for reverse membrane budding. eLife 2017; 6:31652. [PMID: 29019322 PMCID: PMC5665648 DOI: 10.7554/elife.31652] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Accepted: 09/25/2017] [Indexed: 12/18/2022] Open
Abstract
The ESCRT machinery mediates reverse membrane scission. By quantitative fluorescence lattice light-sheet microscopy, we have shown that ESCRT-III subunits polymerize rapidly on yeast endosomes, together with the recruitment of at least two Vps4 hexamers. During their 3–45 s lifetimes, the ESCRT-III assemblies accumulated 75–200 Snf7 and 15–50 Vps24 molecules. Productive budding events required at least two additional Vps4 hexamers. Membrane budding was associated with continuous, stochastic exchange of Vps4 and ESCRT-III components, rather than steady growth of fixed assemblies, and depended on Vps4 ATPase activity. An all-or-none step led to final release of ESCRT-III and Vps4. Tomographic electron microscopy demonstrated that acute disruption of Vps4 recruitment stalled membrane budding. We propose a model in which multiple Vps4 hexamers (four or more) draw together several ESCRT-III filaments. This process induces cargo crowding and inward membrane buckling, followed by constriction of the nascent bud neck and ultimately ILV generation by vesicle fission.
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Affiliation(s)
- Manuel Alonso Y Adell
- Division of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Simona M Migliano
- Division of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Srigokul Upadhyayula
- Department of Pediatrics, Harvard Medical School, Boston, United States.,Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, United States.,Department of Cell Biology, Harvard Medical School, Boston, United States
| | - Yury S Bykov
- Structural and Computational Unit, European Molecular Biology Laboratory, Heidelberg, Germany
| | - Simon Sprenger
- Division of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Mehrshad Pakdel
- Division of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria.,Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Georg F Vogel
- Division of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria.,Division of Histology and Embryology, Medical University of Innsbruck, Innsbruck, Austria
| | - Gloria Jih
- Department of Cell Biology, Harvard Medical School, Boston, United States
| | - Wesley Skillern
- Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, United States
| | - Reza Behrouzi
- Department of Cell Biology, Harvard Medical School, Boston, United States
| | - Markus Babst
- Department of Biology, University of Utah, Utah, United States.,Center for Cell and Genome Science, University of Utah, Utah, United States
| | - Oliver Schmidt
- Division of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Michael W Hess
- Division of Histology and Embryology, Medical University of Innsbruck, Innsbruck, Austria
| | - John Ag Briggs
- Structural and Computational Unit, European Molecular Biology Laboratory, Heidelberg, Germany.,Cell Biology and Biophysics Unit, European Molecular Biology Laboratory, Heidelberg, Germany
| | - Tomas Kirchhausen
- Department of Pediatrics, Harvard Medical School, Boston, United States.,Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, United States.,Department of Cell Biology, Harvard Medical School, Boston, United States
| | - David Teis
- Division of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria.,Austrian Drug Screening Institute, Innsbruck, Austria
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18
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Filipek PA, de Araujo MEG, Vogel GF, De Smet CH, Eberharter D, Rebsamen M, Rudashevskaya EL, Kremser L, Yordanov T, Tschaikner P, Fürnrohr BG, Lechner S, Dunzendorfer-Matt T, Scheffzek K, Bennett KL, Superti-Furga G, Lindner HH, Stasyk T, Huber LA. LAMTOR/Ragulator is a negative regulator of Arl8b- and BORC-dependent late endosomal positioning. J Cell Biol 2017; 216:4199-4215. [PMID: 28993467 PMCID: PMC5716276 DOI: 10.1083/jcb.201703061] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 07/28/2017] [Accepted: 09/11/2017] [Indexed: 12/18/2022] Open
Abstract
Signaling from lysosomes controls cellular clearance and energy metabolism. Lysosomal malfunction has been implicated in several pathologies, including neurodegeneration, cancer, infection, immunodeficiency, and obesity. Interestingly, many functions are dependent on the organelle position. Lysosomal motility requires the integration of extracellular and intracellular signals that converge on a competition between motor proteins that ultimately control lysosomal movement on microtubules. Here, we identify a novel upstream control mechanism of Arl8b-dependent lysosomal movement toward the periphery of the cell. We show that the C-terminal domain of lyspersin, a subunit of BLOC-1-related complex (BORC), is essential and sufficient for BORC-dependent recruitment of Arl8b to lysosomes. In addition, we establish lyspersin as the linker between BORC and late endosomal/lysosomal adaptor and mitogen activated protein kinase and mechanistic target of rapamycin activator (LAMTOR) complexes and show that epidermal growth factor stimulation decreases LAMTOR/BORC association, thereby promoting BORC- and Arl8b-dependent lysosomal centrifugal transport.
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Affiliation(s)
- Przemyslaw A Filipek
- Division of Cell Biology, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - Mariana E G de Araujo
- Division of Cell Biology, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - Georg F Vogel
- Division of Cell Biology, Biocenter, Innsbruck Medical University, Innsbruck, Austria.,Department of Pediatrics I, Innsbruck Medical University, Innsbruck, Austria
| | - Cedric H De Smet
- Division of Cell Biology, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - Daniela Eberharter
- Division of Cell Biology, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - Manuele Rebsamen
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Elena L Rudashevskaya
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria.,Leibniz-Institut für Analytische Wissenschaften-ISAS-e.V., Dortmund, Germany
| | - Leopold Kremser
- Division of Clinical Biochemistry, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - Teodor Yordanov
- Division of Cell Biology, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - Philipp Tschaikner
- Institute for Molecular Biology, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innsbruck, Austria
| | - Barbara G Fürnrohr
- Division of Biological Chemistry, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - Stefan Lechner
- Division of Biological Chemistry, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | | | - Klaus Scheffzek
- Division of Biological Chemistry, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - Keiryn L Bennett
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Giulio Superti-Furga
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria.,Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Herbert H Lindner
- Division of Clinical Biochemistry, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - Taras Stasyk
- Division of Cell Biology, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - Lukas A Huber
- Division of Cell Biology, Biocenter, Innsbruck Medical University, Innsbruck, Austria
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19
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Vogel GF, van Rijn JM, Krainer IM, Janecke AR, Posovszky C, Cohen M, Searle C, Jantchou P, Escher JC, Patey N, Cutz E, Müller T, Middendorp S, Hess MW, Huber LA. Disrupted apical exocytosis of cargo vesicles causes enteropathy in FHL5 patients with Munc18-2 mutations. JCI Insight 2017; 2:94564. [PMID: 28724787 DOI: 10.1172/jci.insight.94564] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Accepted: 06/06/2017] [Indexed: 01/07/2023] Open
Abstract
Familial hemophagocytic lymphohistiocytosis 5 (FHL5) is an autosomal recessive disease caused by mutations in STXBP2, coding for Munc18-2, which is required for SNARE-mediated membrane fusion. FHL5 causes hematologic and gastrointestinal symptoms characterized by chronic enteropathy that is reminiscent of microvillus inclusion disease (MVID). However, the molecular pathophysiology of FHL5-associated diarrhea is poorly understood. Five FHL5 patients, including four previously unreported patients, were studied. Morphology of duodenal sections was analyzed by electron and fluorescence microscopy. Small intestinal enterocytes and organoid-derived monolayers displayed the subcellular characteristics of MVID. For the analyses of Munc18-2-dependent SNARE-protein interactions, a Munc18-2 CaCo2-KO model cell line was generated by applying CRISPR/Cas9 technology. Munc18-2 is required for Slp4a/Stx3 interaction in fusion of cargo vesicles with the apical plasma membrane. Cargo trafficking was investigated in patient biopsies, patient-derived organoids, and the genome-edited model cell line. Loss of Munc18-2 selectively disrupts trafficking of certain apical brush-border proteins (NHE3 and GLUT5), while transport of DPPIV remained unaffected. Here, we describe the molecular mechanism how the loss of function of Munc18-2 leads to cargo-selective mislocalization of brush-border components and a subapical accumulation of cargo vesicles, as it is known from the loss of polarity phenotype in MVID.
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Affiliation(s)
- Georg F Vogel
- Department of Paediatrics I and.,Division of Cell Biology, Medical University of Innsbruck, Innsbruck, Austria
| | - Jorik M van Rijn
- Division of Paediatrics, Department of Paediatric Gastroenterology and Regenerative Medicine Center Utrecht, Wilhelmina Children's Hospital, University Medical Centre (UMC) Utrecht, Utrecht, The Netherlands
| | - Iris M Krainer
- Department of Paediatrics I and.,Division of Cell Biology, Medical University of Innsbruck, Innsbruck, Austria
| | | | - Carsten Posovszky
- Department of Pediatrics and Adolescent Medicine, University Medical Center Ulm, Ulm, Germany
| | - Marta Cohen
- Sheffield Children's Hospital NHS Trust, Western Bank, Sheffield, United Kingdom
| | - Claire Searle
- Clinical Genetics, Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom
| | - Prevost Jantchou
- Gastroentérologie Hépatologie et Nutrition Pédiatrique Hôpital Sainte-Justine, Université de Montréal, Montréal, Quebec, Canada
| | - Johanna C Escher
- Department of Pediatric Gastroenterology, Sophia Children's Hospital, Erasmus MC, Rotterdam, The Netherlands
| | - Natalie Patey
- Clinical Genetics, Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom
| | - Ernest Cutz
- The Hospital for Sick Children, Toronto, Canada
| | | | - Sabine Middendorp
- Division of Paediatrics, Department of Paediatric Gastroenterology and Regenerative Medicine Center Utrecht, Wilhelmina Children's Hospital, University Medical Centre (UMC) Utrecht, Utrecht, The Netherlands
| | - Michael W Hess
- Division of Histology and Embryology, Medical University of Innsbruck, Innsbruck, Austria
| | - Lukas A Huber
- Division of Cell Biology, Medical University of Innsbruck, Innsbruck, Austria
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20
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Vogel GF, Janecke AR, Krainer IM, Gutleben K, Witting B, Mitton SG, Mansour S, Ballauff A, Roland JT, Engevik AC, Cutz E, Müller T, Goldenring JR, Huber LA, Hess MW. Abnormal Rab11-Rab8-vesicles cluster in enterocytes of patients with microvillus inclusion disease. Traffic 2017; 18:453-464. [PMID: 28407399 DOI: 10.1111/tra.12486] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 04/05/2017] [Accepted: 04/05/2017] [Indexed: 12/14/2022]
Abstract
Microvillus inclusion disease (MVID) is a congenital enteropathy characterized by accumulation of vesiculo-tubular endomembranes in the subapical cytoplasm of enterocytes, historically termed "secretory granules." However, neither their identity nor pathophysiological significance is well defined. Using immunoelectron microscopy and tomography, we studied biopsies from MVID patients (3× Myosin 5b mutations and 1× Syntaxin3 mutation) and compared them to controls and genome-edited CaCo2 cell models, harboring relevant mutations. Duodenal biopsies from 2 patients with novel Myosin 5b mutations and typical clinical symptoms showed unusual ultrastructural phenotypes: aberrant subapical vesicles and tubules were prominent in the enterocytes, though other histological hallmarks of MVID were almost absent (ectopic intra-/intercellular microvilli, brush border atrophy). We identified these enigmatic vesiculo-tubular organelles as Rab11-Rab8-positive recycling compartments of altered size, shape and location harboring the apical SNARE Syntaxin3, apical transporters sodium-hydrogen exchanger 3 (NHE3) and cystic fibrosis transmembrane conductance regulator. Our data strongly indicate that in MVID disrupted trafficking between cargo vesicles and the apical plasma membrane is the primary cause of a defect of epithelial polarity and subsequent facultative loss of brush border integrity, leading to malabsorption. Furthermore, they support the notion that mislocalization of transporters, such as NHE3 substantially contributes to the reported sodium loss diarrhea.
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Affiliation(s)
- Georg F Vogel
- Division of Histology and Embryology, Medical University of Innsbruck, Innsbruck, Austria.,Division of Cell Biology, Medical University of Innsbruck, Innsbruck, Austria.,Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Andreas R Janecke
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Iris M Krainer
- Division of Cell Biology, Medical University of Innsbruck, Innsbruck, Austria.,Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Karin Gutleben
- Division of Histology and Embryology, Medical University of Innsbruck, Innsbruck, Austria
| | - Barbara Witting
- Division of Histology and Embryology, Medical University of Innsbruck, Innsbruck, Austria
| | | | - Sahar Mansour
- Human Genetics Research Center, St. George's University of London, London, UK
| | | | - Joseph T Roland
- Section of Surgical Sciences, Vanderbilt University School of Medicine, Nashville, Tennessee.,Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, Tennessee.,Departments of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Amy C Engevik
- Section of Surgical Sciences, Vanderbilt University School of Medicine, Nashville, Tennessee.,Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, Tennessee.,Departments of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Ernest Cutz
- Division of Pathology, Department of Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, Canada
| | - Thomas Müller
- Department of Paediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - James R Goldenring
- Section of Surgical Sciences, Vanderbilt University School of Medicine, Nashville, Tennessee.,Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, Tennessee.,Departments of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Lukas A Huber
- Division of Cell Biology, Medical University of Innsbruck, Innsbruck, Austria
| | - Michael W Hess
- Division of Histology and Embryology, Medical University of Innsbruck, Innsbruck, Austria
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21
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Vogel GF, Klee KMC, Janecke AR, Müller T, Hess MW, Huber LA. Cargo-selective apical exocytosis in epithelial cells is conducted by Myo5B, Slp4a, Vamp7, and Syntaxin 3. J Cell Biol 2016; 211:587-604. [PMID: 26553929 PMCID: PMC4639860 DOI: 10.1083/jcb.201506112] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The motor protein Myo5B and t-SNARE Stx3 drive cargo-selective apical exocytosis in polarized epithelial cells in a pathway dependent on v-SNARE–like Slp4a, v-SNARE Vamp7, Sec1/Munc18-like protein Munc18-2, and the Rab11/8 cascade. Mutations in the motor protein Myosin Vb (Myo5B) or the soluble NSF attachment protein receptor Syntaxin 3 (Stx3) disturb epithelial polarity and cause microvillus inclusion disease (MVID), a lethal hereditary enteropathy affecting neonates. To understand the molecular mechanism of Myo5B and Stx3 interplay, we used genome editing to introduce a defined Myo5B patient mutation in a human epithelial cell line. Our results demonstrate a selective role of Myo5B and Stx3 for apical cargo exocytosis in polarized epithelial cells. Apical exocytosis of NHE3, CFTR (cystic fibrosis transmembrane conductance regulator), and GLUT5 required an interaction cascade of Rab11, Myo5B, Slp4a, Munc18-2, and Vamp7 with Stx3, which cooperate in the final steps of this selective apical traffic pathway. The brush border enzymes DPPIV and sucrase-isomaltase still correctly localize at the apical plasma membrane independent of this pathway. Hence, our work demonstrates how Myo5B, Stx3, Slp4a, Vamp7, Munc18-2, and Rab8/11 cooperate during selective apical cargo trafficking and exocytosis in epithelial cells and thereby provides further insight into MVID pathophysiology.
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Affiliation(s)
- Georg F Vogel
- Division of Cell Biology, Biocenter, Medical University of Innsbruck, 6020 Innsbruck, Austria Division of Histology and Embryology, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Katharina M C Klee
- Division of Cell Biology, Biocenter, Medical University of Innsbruck, 6020 Innsbruck, Austria Institute of Molecular Biology, University of Innsbruck, 6020 Innsbruck, Austria Center for Molecular Biosciences Innsbruck, University of Innsbruck, 6020 Innsbruck, Austria
| | - Andreas R Janecke
- Department of Paediatrics I, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Thomas Müller
- Department of Paediatrics I, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Michael W Hess
- Division of Histology and Embryology, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Lukas A Huber
- Division of Cell Biology, Biocenter, Medical University of Innsbruck, 6020 Innsbruck, Austria
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22
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Vogel GF, Ebner HL, de Araujo MEG, Schmiedinger T, Eiter O, Pircher H, Gutleben K, Witting B, Teis D, Huber LA, Hess MW. Ultrastructural Morphometry Points to a New Role for LAMTOR2 in Regulating the Endo/Lysosomal System. Traffic 2015; 16:617-34. [DOI: 10.1111/tra.12271] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Revised: 02/09/2015] [Accepted: 02/09/2015] [Indexed: 12/13/2022]
Affiliation(s)
- Georg F. Vogel
- Division of Histology and Embryology; Medical University of Innsbruck; Müllerstrasse 59 A-6020 Innsbruck Austria
- Division of Cell Biology, Biocenter; Medical University of Innsbruck; Innrain 80-82 A-6020 Innsbruck Austria
| | - Hannes L. Ebner
- Division of Histology and Embryology; Medical University of Innsbruck; Müllerstrasse 59 A-6020 Innsbruck Austria
- Current address: Department for Trauma Surgery; Medical University of Innsbruck; Anichstrasse 35 A-6020 Innsbruck Austria
| | - Mariana E. G. de Araujo
- Division of Cell Biology, Biocenter; Medical University of Innsbruck; Innrain 80-82 A-6020 Innsbruck Austria
| | - Thomas Schmiedinger
- Department of Therapeutic Radiology and Oncology; Medical University of Innsbruck; Anichstrasse 35 A-6020 Innsbruck Austria
| | - Oliver Eiter
- Department of Therapeutic Radiology and Oncology; Medical University of Innsbruck; Anichstrasse 35 A-6020 Innsbruck Austria
| | - Haymo Pircher
- Research Institute for Biomedical Aging Research; University of Innsbruck; Rennweg 10 A-6020 Innsbruck Austria
| | - Karin Gutleben
- Division of Histology and Embryology; Medical University of Innsbruck; Müllerstrasse 59 A-6020 Innsbruck Austria
| | - Barbara Witting
- Division of Histology and Embryology; Medical University of Innsbruck; Müllerstrasse 59 A-6020 Innsbruck Austria
| | - David Teis
- Division of Cell Biology, Biocenter; Medical University of Innsbruck; Innrain 80-82 A-6020 Innsbruck Austria
| | - Lukas A. Huber
- Division of Cell Biology, Biocenter; Medical University of Innsbruck; Innrain 80-82 A-6020 Innsbruck Austria
| | - Michael W. Hess
- Division of Histology and Embryology; Medical University of Innsbruck; Müllerstrasse 59 A-6020 Innsbruck Austria
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23
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Csiszar A, Kutay B, Wirth S, Schmidt U, Macho-Maschler S, Schreiber M, Alacakaptan M, Vogel GF, Aumayr K, Huber LA, Beug H. Interleukin-like epithelial-to-mesenchymal transition inducer activity is controlled by proteolytic processing and plasminogen-urokinase plasminogen activator receptor system-regulated secretion during breast cancer progression. Breast Cancer Res 2014; 16:433. [PMID: 25212966 PMCID: PMC4303039 DOI: 10.1186/s13058-014-0433-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Accepted: 08/27/2014] [Indexed: 12/27/2022] Open
Abstract
Introduction Interleukin-like epithelial-to-mesenchymal transition inducer (ILEI) is an essential cytokine in tumor progression that is upregulated in several cancers, and its altered subcellular localization is a predictor of poor survival in human breast cancer. However, the regulation of ILEI activity and the molecular meaning of its altered localization remain elusive. Methods The influence of serum withdrawal, broad-specificity protease inhibitors, different serine proteases and plasminogen depletion on the size and amount of the secreted ILEI protein was investigated by Western blot analysis of EpRas cells. Proteases with ILEI-processing capacity were identified by carrying out an in vitro cleavage assay. Murine mammary tumor and metastasis models of EpC40 and 4T1 cells overexpressing different mutant forms of ILEI were used—extended with in vivo aprotinin treatment for the inhibition of ILEI-processing proteases—to test the in vivo relevance of proteolytic cleavage. Stable knockdown of urokinase plasminogen activator receptor (uPAR) in EpRas cells was performed to investigate the involvement of uPAR in ILEI secretion. The subcellular localization of the ILEI protein in tumor cell lines was analyzed by immunofluorescence. Immunohistochemistry for ILEI localization and uPAR expression was performed on two human breast cancer arrays, and ILEI and uPAR scores were correlated with the metastasis-free survival of patients. Results We demonstrate that secreted ILEI requires site-specific proteolytic maturation into its short form for its tumor-promoting function, which is executed by serine proteases, most efficiently by plasmin. Noncleaved ILEI is tethered to fibronectin-containing fibers of the extracellular matrix through a propeptide-dependent interaction. In addition to ILEI processing, plasmin rapidly increases ILEI secretion by mobilizing its intracellular protein pool in a uPAR-dependent manner. Elevated ILEI secretion correlates with an altered subcellular localization of the protein, most likely representing a shift into secretory vesicles. Moreover, altered subcellular ILEI localization strongly correlates with high tumor cell–associated uPAR protein expression, as well as with poor survival, in human breast cancer. Conclusions Our findings point out extracellular serine proteases, in particular plasmin, and uPAR as valuable therapeutic targets against ILEI-driven tumor progression and emphasize the prognostic relevance of ILEI localization and a combined ILEI-uPAR marker analysis in human breast cancer. Electronic supplementary material The online version of this article (doi:10.1186/s13058-014-0433-7) contains supplementary material, which is available to authorized users.
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24
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Wiegerinck CL, Janecke AR, Schneeberger K, Vogel GF, van Haaften-Visser DY, Escher JC, Adam R, Thöni CE, Pfaller K, Jordan AJ, Weis CA, Nijman IJ, Monroe GR, van Hasselt PM, Cutz E, Klumperman J, Clevers H, Nieuwenhuis EES, Houwen RHJ, van Haaften G, Hess MW, Huber LA, Stapelbroek JM, Müller T, Middendorp S. Loss of syntaxin 3 causes variant microvillus inclusion disease. Gastroenterology 2014; 147:65-68.e10. [PMID: 24726755 DOI: 10.1053/j.gastro.2014.04.002] [Citation(s) in RCA: 126] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Revised: 04/04/2014] [Accepted: 04/06/2014] [Indexed: 01/07/2023]
Abstract
Microvillus inclusion disease (MVID) is a disorder of intestinal epithelial differentiation characterized by life-threatening intractable diarrhea. MVID can be diagnosed based on loss of microvilli, microvillus inclusions, and accumulation of subapical vesicles. Most patients with MVID have mutations in myosin Vb that cause defects in recycling of apical vesicles. Whole-exome sequencing of DNA from patients with variant MVID showed homozygous truncating mutations in syntaxin 3 (STX3). STX3 is an apical receptor involved in membrane fusion of apical vesicles in enterocytes. Patient-derived organoid cultures and overexpression of truncated STX3 in Caco-2 cells recapitulated most characteristics of variant MVID. We conclude that loss of STX3 function causes variant MVID.
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Affiliation(s)
- Caroline L Wiegerinck
- Division of Pediatrics, Department of Pediatric Gastroenterology, Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Andreas R Janecke
- Division of Human Genetics, Biocenter Innsbruck, Innsbruck, Austria; Department of Pediatrics I, Biocenter Innsbruck, Innsbruck, Austria
| | - Kerstin Schneeberger
- Division of Pediatrics, Department of Pediatric Gastroenterology, Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Georg F Vogel
- Division of Cell Biology, Biocenter Innsbruck, Innsbruck, Austria; Division of Histology and Embryology, Innsbruck Medical University, Innsbruck, Austria
| | - Désirée Y van Haaften-Visser
- Division of Pediatrics, Department of Pediatric Gastroenterology, Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht, The Netherlands; Department of Cell Biology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Johanna C Escher
- Pediatric Gastroenterology, Sophia Children's Hospital, Erasmus MC, Rotterdam, The Netherlands
| | - Rüdiger Adam
- Pediatric Gastroenterology, Department of Pediatric and Adolescent Medicine, University Medical Centre, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Cornelia E Thöni
- Division of Cell Biology, Biocenter Innsbruck, Innsbruck, Austria; Division of Pathology, Department of Pediatric Laboratory Medicine, Hospital for Sick Children, Toronto, Canada
| | - Kristian Pfaller
- Division of Histology and Embryology, Innsbruck Medical University, Innsbruck, Austria
| | - Alexander J Jordan
- Pediatric Gastroenterology, Department of Pediatric and Adolescent Medicine, University Medical Centre, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Cleo-Aron Weis
- Institute of Pathology, University Medical Centre, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Isaac J Nijman
- Department of Medical Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Glen R Monroe
- Department of Medical Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Peter M van Hasselt
- Division of Pediatrics, Department of Metabolic Diseases, Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Ernest Cutz
- Division of Pathology, Department of Pediatric Laboratory Medicine, Hospital for Sick Children, Toronto, Canada
| | - Judith Klumperman
- Department of Cell Biology, University Medical Center Utrecht, Utrecht, The Netherlands; University Medical Center Utrecht, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Hans Clevers
- Hubrecht Institute for Developmental Biology and Stem Cell Research, Royal Dutch Academy of Sciences, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Edward E S Nieuwenhuis
- Division of Pediatrics, Department of Pediatric Gastroenterology, Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Roderick H J Houwen
- Division of Pediatrics, Department of Pediatric Gastroenterology, Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Gijs van Haaften
- Department of Medical Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Michael W Hess
- Division of Histology and Embryology, Innsbruck Medical University, Innsbruck, Austria
| | - Lukas A Huber
- Division of Cell Biology, Biocenter Innsbruck, Innsbruck, Austria
| | - Janneke M Stapelbroek
- Division of Pediatrics, Department of Pediatric Gastroenterology, Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Thomas Müller
- Department of Pediatrics I, Biocenter Innsbruck, Innsbruck, Austria.
| | - Sabine Middendorp
- Division of Pediatrics, Department of Pediatric Gastroenterology, Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht, The Netherlands.
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Adell MAY, Vogel GF, Pakdel M, Müller M, Lindner H, Hess MW, Teis D. Coordinated binding of Vps4 to ESCRT-III drives membrane neck constriction during MVB vesicle formation. ACTA ACUST UNITED AC 2014; 205:33-49. [PMID: 24711499 PMCID: PMC3987140 DOI: 10.1083/jcb.201310114] [Citation(s) in RCA: 128] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Five endosomal sorting complexes required for transport (ESCRTs) mediate the degradation of ubiquitinated membrane proteins via multivesicular bodies (MVBs) in lysosomes. ESCRT-0, -I, and -II interact with cargo on endosomes. ESCRT-II also initiates the assembly of a ringlike ESCRT-III filament consisting of Vps20, Snf7, Vps24, and Vps2. The AAA-adenosine triphosphatase Vps4 disassembles and recycles the ESCRT-III complex, thereby terminating the ESCRT pathway. A mechanistic role for Vps4 in intraluminal vesicle (ILV) formation has been unclear. By combining yeast genetics, biochemistry, and electron tomography, we find that ESCRT-III assembly on endosomes is required to induce or stabilize the necks of growing MVB ILVs. Yet, ESCRT-III alone is not sufficient to complete ILV biogenesis. Rather, binding of Vps4 to ESCRT-III, coordinated by interactions with Vps2 and Snf7, is coupled to membrane neck constriction during ILV formation. Thus, Vps4 not only recycles ESCRT-III subunits but also cooperates with ESCRT-III to drive distinct membrane-remodeling steps, which lead to efficient membrane scission at the end of ILV biogenesis in vivo.
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Affiliation(s)
- Manuel Alonso Y Adell
- Division of Cell Biology and 2 Division of Clinical Biochemistry, Biocenter; and 3 Division of Histology and Embryology; Innsbruck Medical University, Innsbruck 6020, Austria
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26
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Amann A, Zwierzina M, Gamerith G, Bitsche M, Huber JM, Vogel GF, Blumer M, Koeck S, Pechriggl EJ, Kelm JM, Hilbe W, Zwierzina H. Development of an innovative 3D cell culture system to study tumour--stroma interactions in non-small cell lung cancer cells. PLoS One 2014; 9:e92511. [PMID: 24663399 PMCID: PMC3963897 DOI: 10.1371/journal.pone.0092511] [Citation(s) in RCA: 114] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Accepted: 02/24/2014] [Indexed: 11/18/2022] Open
Abstract
Introduction We describe a novel 3D co-culture model using non-small cell lung cancer (NSCLC) cell lines in combination with lung fibroblasts. This model allows the investigation of tumour-stroma interactions and addresses the importance of having a more in vivo like cell culture model. Methods Automation-compatible multi-well hanging drop microtiter plates were used for the production of 3D mono- and co-cultures. In these hanging drops the two NSCLC cell lines A549 and Colo699 were cultivated either alone or co-cultured with lung fibroblasts. The viability of tumour spheroids was confirmed after five and ten days by using Annexin V/Propidium Iodide staining for flow-cytometry. Tumour fibroblast spheroid formation was characterized by scanning electron microscope (SEM), semi-thin sections, fluorescence microscope and immunohistochemistry (IHC). In addition to conventional histology, protein expression of E-Cadherin, vimentin, Ki67, fibronectin, cytokeratin 7 and α-smooth muscle actin (α-SMA) was investigated by IHC. Results Lower viability was observed in A549 monocultures compared to co-cultures, whereas Colo699 monocultures showed better viability compared to co-cultures. Ki67 expression varied significantly between mono- and co-cultures in both tumour cell lines. An increase of vimentin and decreased E-Cadherin expression could be detected during the course of the cultivation suggesting a transition to a more mesenchymal phenotype. Furthermore, the fibroblast cell line showed an expression of α-SMA only in co-culture with the cancer cell line A549, thereby indicating a mesenchymal to mesenchymal shift to an even more myofibroblast phenotype. Conclusion We demonstrate that our method is a promising tool for the generation of tumour spheroid co-cultures. Furthermore, these spheroids allow the investigation of tumour-stroma interactions and a better reflection of in vivo conditions of cancer cells in their microenvironment. Our method holds potential to contribute to the development of anti-cancer agents and support the search for biomarkers.
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Affiliation(s)
- Arno Amann
- Department of Internal Medicine V, Medical University Innsbruck, Innsbruck, Tyrol, Austria
- * E-mail:
| | - Marit Zwierzina
- Department of Anatomy, Histology and Embryology, Medical University Innsbruck, Innsbruck, Tyrol, Austria
| | - Gabriele Gamerith
- Department of Internal Medicine V, Medical University Innsbruck, Innsbruck, Tyrol, Austria
| | - Mario Bitsche
- Department of Anatomy, Histology and Embryology, Medical University Innsbruck, Innsbruck, Tyrol, Austria
| | - Julia M. Huber
- Department of Internal Medicine V, Medical University Innsbruck, Innsbruck, Tyrol, Austria
| | - Georg F. Vogel
- Department of Anatomy, Histology and Embryology, Medical University Innsbruck, Innsbruck, Tyrol, Austria
| | - Michael Blumer
- Department of Anatomy, Histology and Embryology, Medical University Innsbruck, Innsbruck, Tyrol, Austria
| | - Stefan Koeck
- Department of Internal Medicine V, Medical University Innsbruck, Innsbruck, Tyrol, Austria
| | - Elisabeth J. Pechriggl
- Department of Anatomy, Histology and Embryology, Medical University Innsbruck, Innsbruck, Tyrol, Austria
| | - Jens M. Kelm
- InSphero AG, Schlieren, Canton of Zürich, Switzerland
| | - Wolfgang Hilbe
- Department of Internal Medicine V, Medical University Innsbruck, Innsbruck, Tyrol, Austria
| | - Heinz Zwierzina
- Department of Internal Medicine V, Medical University Innsbruck, Innsbruck, Tyrol, Austria
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Thoeni CE, Vogel GF, Tancevski I, Geley S, Lechner S, Pfaller K, Hess MW, Müller T, Janecke AR, Avitzur Y, Muise A, Cutz E, Huber LA. Microvillus inclusion disease: loss of Myosin vb disrupts intracellular traffic and cell polarity. Traffic 2013; 15:22-42. [PMID: 24138727 DOI: 10.1111/tra.12131] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Revised: 10/11/2013] [Accepted: 10/18/2013] [Indexed: 12/23/2022]
Abstract
Microvillus inclusion disease (MVID) is a congenital enteropathy characterized by loss of apical microvilli and formation of cytoplasmic inclusions lined by microvilli in enterocytes. MVID is caused by mutations in the MYO5B gene, coding for the myosin Vb motor protein. Although myosin Vb is implicated in the organization of intracellular transport and cell surface polarity in epithelial cells, its precise role in the pathogenesis of MVID is unknown. We performed correlative immunohistochemistry analyses of sections from duodenal biopsies of a MVID patient, compound heterozygous for two novel MYO5B mutations, predicting loss of function of myosin Vb in duodenal enterocytes together with a stable MYO5B CaCo2 RNAi cell system. Our findings show that myosin Vb-deficient enterocytes display disruption of cell polarity as reflected by mislocalized apical and basolateral transporter proteins, altered distribution of certain endosomal/lysosomal constituents including Rab GTPases. Together, this severe disturbance of epithelial cell function could shed light on the pathology and symptoms of MVID.
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Affiliation(s)
- Cornelia E Thoeni
- Division of Cell Biology, Biocenter Innsbruck, Medical University Innsbruck, Innsbruck, Austria; Division of Pathology, Department of Pediatric Laboratory Medicine, Hospital for Sick Children, Toronto, Canada
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Schmiedinger T, Vogel GF, Eiter O, Pfaller K, Kaufmann WA, Flörl A, Gutleben K, Schönherr S, Witting B, Lechleitner TW, Ebner HL, Seppi T, Hess MW. Cryo-immunoelectron microscopy of adherent cells improved by the use of electrospun cell culture substrates. Traffic 2013; 14:886-94. [PMID: 23631675 DOI: 10.1111/tra.12080] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Revised: 04/25/2013] [Accepted: 04/30/2013] [Indexed: 01/27/2023]
Abstract
Electrospun nanofibres are an excellent cell culture substrate, enabling the fast and non-disruptive harvest and transfer of adherent cells for microscopical and biochemical analyses. Metabolic activity and cellular structures are maintained during the only half a minute-long harvest and transfer process. We show here that such samples can be optimally processed by means of cryofixation combined either with freeze-substitution, sample rehydration and cryosection-immunolabelling or with freeze-fracture replica-immunolabelling. Moreover, electrospun fibre substrates are equally suitable for complementary approaches, such as biochemistry, fluorescence microscopy and cytochemistry.
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Affiliation(s)
- Thomas Schmiedinger
- Department of Therapeutic Radiology and Oncology, Innsbruck Medical University, Anichstrasse 35, A-6020, Innsbruck, Austria
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Heel T, Vogel GF, Lammirato A, Schneider R, Auer B. FlgM as a secretion moiety for the development of an inducible type III secretion system. PLoS One 2013; 8:e59034. [PMID: 23554966 PMCID: PMC3595227 DOI: 10.1371/journal.pone.0059034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Accepted: 02/11/2013] [Indexed: 11/18/2022] Open
Abstract
Regulation and assembly of the flagellar type III secretion system is one of the most investigated and best understood regulational cascades in molecular biology. Depending on the host organism, flagellar morphogenesis requires the interplay of more than 50 genes. Direct secretion of heterologous proteins to the supernatant is appealing due to protection against cellular proteases and simplified downstream processing. As Escherichia coli currently remains the predominant host organism used for recombinant prokaryotic protein expression, the generation of a strain that exhibits inducible flagellar secretion would be highly desirable for biotechnological applications. Here, we report the first engineered Escherichia coli mutant strain featuring flagellar morphogenesis upon addition of an external inducer. Using FlgM as a sensor for direct secretion in combination with this novel strain may represent a potent tool for significant improvements in future engineering of an inducible type III secretion for heterologous proteins.
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Affiliation(s)
- Thomas Heel
- Institute of Biochemistry, University of Innsbruck, Innsbruck, Austria.
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