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Busch J, Kaplan J, Merk T, Köhler R, Neumann W, Kühn A. P 43 Optimizing beta-burst driven adaptive deep brain stimulation for Parkinson's disease. Clin Neurophysiol 2022. [DOI: 10.1016/j.clinph.2022.01.074] [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: 11/29/2022]
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2
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Grushko M, Goldstein J, ElSeht Z, Alarcon A, Jones N, Samizadeh M, Zhu Y, Kaplan J, Arline K. 1146P Closing the target gap: A computational approach to optimizing therapeutic selection for cancer patients. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.787] [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: 11/30/2022] Open
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3
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Moreno-Artero E, Morice-Picard F, Bremond-Gignac D, Drumare-Bouvet I, Duncombe-Poulet C, Leclerc-Mercier S, Dufresne H, Kaplan J, Jouanne B, Arveiler B, Taieb A, Hadj-Rabia S. Management of albinism: French guidelines for diagnosis and care. J Eur Acad Dermatol Venereol 2021; 35:1449-1459. [PMID: 34042219 DOI: 10.1111/jdv.17275] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 03/22/2021] [Indexed: 12/12/2022]
Abstract
Albinism is a worldwide genetic disorder caused by mutations in at least 20 genes, identified to date, that affect melanin production or transport in the skin, hair and eyes. Patients present with variable degrees of diffuse muco-cutaneous and adnexal hypopigmentation, as well as ocular features including nystagmus, misrouting of optic nerves and foveal hypoplasia. Less often, albinism is associated with blood, immunological, pulmonary, digestive and/or neurological anomalies. Clinical and molecular characterizations are essential in preventing potential complications. Disease-causing mutations remain unknown for about 25% of patients with albinism. These guidelines have been developed for the diagnosis and management of syndromic and non-syndromic forms of albinism, based on a systematic review of the scientific literature. These guidelines comprise clinical and molecular characterization, diagnosis, therapeutic approach and management.
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Affiliation(s)
- E Moreno-Artero
- Department of Dermatology, Reference Center for Genodermatoses and Rare Skin Diseases (MAGEC), Hôpital Universitaire Necker- Enfants Malades, Assistance Publique - Hôpitaux de Paris-Centre (AP-HP5), Paris, France
| | - F Morice-Picard
- Pediatric Dermatology Unit, National Centre for Rare Skin Disorders, Hôpital Pellegrin-Enfants, CHU de Bordeaux, Bordeaux, France
| | - D Bremond-Gignac
- Department of Ophthalmology, Reference Centre for Rare Ocular Diseases (OPHTARA), Hôpital Necker-Enfants Malades, APHP5, Paris, France.,Université de Paris-Centre, Paris, France
| | - I Drumare-Bouvet
- Service d'exploration de la vision et neuro-ophtalmologie, CHRU de Lille, Lille, France
| | | | - S Leclerc-Mercier
- Department of Pathology, Hôpital Necker-Enfants Malades, APHP5, Reference Center for Genodermatoses and Rare Skin Diseases (MAGEC), Université de Paris-Centre, Paris, France
| | - H Dufresne
- Department of Dermatology, Reference Center for Genodermatoses and Rare Skin Diseases (MAGEC), Hôpital Universitaire Necker- Enfants Malades, Assistance Publique - Hôpitaux de Paris-Centre (AP-HP5), Paris, France.,Service Social Pédiatrique, Hôpital Necker-Enfants Malades, APHP5, Université de Paris-Centre, Paris, France
| | - J Kaplan
- Laboratory of Genetics in Ophthalmology, Imagine Institute, Paris, France
| | - B Jouanne
- French Association for Albinism (Genespoir), Rennes, France
| | - B Arveiler
- Molecular Genetics Laboratory, CHU de Bordeaux, Bordeaux, France.,INSERM U1211, Maladies Rares, Génétique et Métabolisme, Bordeaux, France
| | - A Taieb
- Pediatric Dermatology Unit, National Centre for Rare Skin Disorders, Hôpital Pellegrin-Enfants, CHU de Bordeaux, Bordeaux, France
| | - S Hadj-Rabia
- Department of Dermatology, Reference Center for Genodermatoses and Rare Skin Diseases (MAGEC), Hôpital Universitaire Necker- Enfants Malades, Assistance Publique - Hôpitaux de Paris-Centre (AP-HP5), Paris, France.,Université de Paris-Centre, Paris, France
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Kaplan J, Gero A, Simmons R, Kaiser J, Fay K, Turok D. P82 Feasibility of randomization to the copper or levonorgestrel IUD. Contraception 2020. [DOI: 10.1016/j.contraception.2020.07.102] [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: 11/27/2022]
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Seguin A, Jia X, Earl AM, Li L, Wallace J, Qiu A, Bradley T, Shrestha R, Troadec MB, Hockin M, Titen S, Warner DE, Dowdle PT, Wohlfahrt ME, Hillas E, Firpo MA, Phillips JD, Kaplan J, Paw BH, Barasch J, Ward DM. The mitochondrial metal transporters mitoferrin1 and mitoferrin2 are required for liver regeneration and cell proliferation in mice. J Biol Chem 2020; 295:11002-11020. [PMID: 32518166 DOI: 10.1074/jbc.ra120.013229] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [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: 02/26/2020] [Revised: 06/04/2020] [Indexed: 01/31/2023] Open
Abstract
Mitochondrial iron import is essential for iron-sulfur cluster formation and heme biosynthesis. Two nuclear-encoded vertebrate mitochondrial high-affinity iron importers, mitoferrin1 (Mfrn1) and Mfrn2, have been identified in mammals. In mice, the gene encoding Mfrn1, solute carrier family 25 member 37 (Slc25a37), is highly expressed in sites of erythropoiesis, and whole-body Slc25a37 deletion leads to lethality. Here, we report that mice with a deletion of Slc25a28 (encoding Mfrn2) are born at expected Mendelian ratios, but show decreased male fertility due to reduced sperm numbers and sperm motility. Mfrn2 -/- mice placed on a low-iron diet exhibited reduced mitochondrial manganese, cobalt, and zinc levels, but not reduced iron. Hepatocyte-specific loss of Slc25a37 (encoding Mfrn1) in Mfrn2 -/- mice did not affect animal viability, but resulted in a 40% reduction in mitochondrial iron and reduced levels of oxidative phosphorylation proteins. Placing animals on a low-iron diet exaggerated the reduction in mitochondrial iron observed in liver-specific Mfrn1/2-knockout animals. Mfrn1 -/-/Mfrn2 -/- bone marrow-derived macrophages or skin fibroblasts in vitro were unable to proliferate, and overexpression of Mfrn1-GFP or Mfrn2-GFP prevented this proliferation defect. Loss of both mitoferrins in hepatocytes dramatically reduced regeneration in the adult mouse liver, further supporting the notion that both mitoferrins transport iron and that their absence limits proliferative capacity of mammalian cells. We conclude that Mfrn1 and Mfrn2 contribute to mitochondrial iron homeostasis and are required for high-affinity iron import during active proliferation of mammalian cells.
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Affiliation(s)
- Alexandra Seguin
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, Utah, USA
| | - Xuan Jia
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, Utah, USA
| | - Aubree M Earl
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, Utah, USA
| | - Liangtao Li
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, Utah, USA
| | - Jared Wallace
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, Utah, USA
| | - Andong Qiu
- Columbia University, New York, New York, USA
| | - Thomas Bradley
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, Utah, USA
| | - Rishna Shrestha
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, Utah, USA
| | - Marie-Bérengère Troadec
- University Brest, Inserm, EFS, UMR 1078, GGB, F-29200, Brest, France.,CHRU Brest, Service of Genetics, Laboratory of Chromosome Genetics, Brest, France
| | - Matt Hockin
- Department of Human Genetics, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| | - Simon Titen
- Department of Human Genetics, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| | - Dave E Warner
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, Utah, USA
| | - P Tom Dowdle
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, Utah, USA
| | - Martin E Wohlfahrt
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| | - Elaine Hillas
- Department of General Surgery, University of Utah School of Medicine, Salt Lake City, Utah, USA
| | - Matthew A Firpo
- Department of General Surgery, University of Utah School of Medicine, Salt Lake City, Utah, USA
| | - John D Phillips
- Department of Medicine, University of Utah School of Medicine, Salt Lake City, Utah
| | - Jerry Kaplan
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, Utah, USA
| | - Barry H Paw
- Harvard Medical School, Children's Hospital, Boston, Massachusetts, USA
| | | | - Diane M Ward
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, Utah, USA
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Rotenberg O, Fridman D, Doulaveris G, Renz M, Kaplan J, Gebb J, Xie X, Goldberg GL, Dar P. Long-term outcome of postmenopausal women with non-atypical endometrial hyperplasia on endometrial sampling. Ultrasound Obstet Gynecol 2020; 55:546-551. [PMID: 31389091 DOI: 10.1002/uog.20421] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 07/15/2019] [Accepted: 07/26/2019] [Indexed: 06/10/2023]
Abstract
OBJECTIVE To assess the long-term outcome of postmenopausal women diagnosed with non-atypical endometrial hyperplasia (NEH). METHODS This was a retrospective study of women aged 55 or older who underwent endometrial sampling in our academic medical center between 1997 and 2008. Women who had a current or recent (< 2 years) histological diagnosis of NEH were included in the study group and were compared with those diagnosed with atrophic endometrium (AE). Outcome data were obtained until February 2018. The main outcomes were risk of progression to endometrial carcinoma and risk of persistence, recurrence or new development of endometrial hyperplasia (EH) ('persistent EH'). Logistic regression analysis was used to identify covariates that were independent risk factors for progression to endometrial cancer or persistent EH. RESULTS During the study period, 1808 women aged 55 or older underwent endometrial sampling. The median surveillance time was 10.0 years. Seventy-two women were found to have a current or recent diagnosis of NEH and were compared with 722 women with AE. When compared to women with AE, women with NEH had significantly higher body mass index (33.9 kg/m2 vs 30.6 kg/m2 ; P = 0.01), greater endometrial thickness (10.00 mm vs 6.00 mm; P = 0.01) and higher rates of progression to type-1 endometrial cancer (8.3% vs 0.8%; P = 0.0003) and persistent NEH (22.2% vs 0.7%; P < 0.0001). They also had a higher rate of progression to any type of uterine cancer or persistent EH (33.3% vs 3.5%; P < 0.0001). Women with NEH had a significantly higher rate of future surgical intervention (51.4% vs 15.8%; P < 0.0001), including future hysterectomy (34.7% vs 9.8%; P < 0.0001). On multivariable logistic regression analysis, only NEH remained a significant risk factor for progression to endometrial cancer or persistence of EH. CONCLUSIONS Postmenopausal women with NEH are at significant risk for persistent EH and progression to endometrial cancer, at rates higher than those reported previously. Guidelines for the appropriate management of postmenopausal women with NEH are needed in order to decrease the rate of persistent disease or progression to cancer. Copyright © 2019 ISUOG. Published by John Wiley & Sons Ltd.
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Affiliation(s)
- O Rotenberg
- Department of Obstetrics and Gynecology and Women's Health, Albert Einstein College of Medicine/Montefiore Medical Canter, Bronx, New York, NY, USA
| | - D Fridman
- Department of Obstetrics and Gynecology, Duke University, Durham, NC, USA
| | - G Doulaveris
- Department of Obstetrics and Gynecology and Women's Health, Albert Einstein College of Medicine/Montefiore Medical Canter, Bronx, New York, NY, USA
| | - M Renz
- Department of Obstetrics and Gynecology, Gynecologic Oncology, Stanford University, Stanford, CA, USA
| | - J Kaplan
- Department of Obstetrics and Gynecology and Women's Health, Albert Einstein College of Medicine/Montefiore Medical Canter, Bronx, New York, NY, USA
| | - J Gebb
- Department of Obstetrics and Gynecology, University of Pennsylvania, Philadelphia, PA, USA
| | - X Xie
- Department of Obstetrics and Gynecology and Women's Health, Albert Einstein College of Medicine/Montefiore Medical Canter, Bronx, New York, NY, USA
| | - G L Goldberg
- Department of Obstetrics and Gynecology, Gynecologic Oncology, Northwell Health, LIJ Medical Center, New Hyde Park, New York, NY, USA
| | - P Dar
- Department of Obstetrics and Gynecology and Women's Health, Albert Einstein College of Medicine/Montefiore Medical Canter, Bronx, New York, NY, USA
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Li L, Bertram S, Kaplan J, Jia X, Ward DM. The mitochondrial iron exporter genes MMT1 and MMT2 in yeast are transcriptionally regulated by Aft1 and Yap1. J Biol Chem 2020; 295:1716-1726. [PMID: 31896574 PMCID: PMC7008362 DOI: 10.1074/jbc.ra119.011154] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 12/30/2019] [Indexed: 12/12/2022] Open
Abstract
Budding yeast (Saccharomyces cerevisiae) responds to low cytosolic iron by up-regulating the expression of iron import genes; iron import can reflect iron transport into the cytosol or mitochondria. Mmt1 and Mmt2 are nuclearly encoded mitochondrial proteins that export iron from the mitochondria into the cytosol. Here we report that MMT1 and MMT2 expression is transcriptionally regulated by two pathways: the low-iron-sensing transcription factor Aft1 and the oxidant-sensing transcription factor Yap1. We determined that MMT1 and MMT2 expression is increased under low-iron conditions and decreased when mitochondrial iron import is increased through overexpression of the high-affinity mitochondrial iron importer Mrs3. Moreover, loss of iron-sulfur cluster synthesis induced expression of MMT1 and MMT2 We show that exposure to the oxidant H2O2 induced MMT1 expression but not MMT2 expression and identified the transcription factor Yap1 as being involved in oxidant-mediated MMT1 expression. We defined Aft1- and Yap1-dependent transcriptional sites in the MMT1 promoter that are necessary for low-iron- or oxidant-mediated MMT1 expression. We also found that the MMT2 promoter contains domains that are important for regulating its expression under low-iron conditions, including an upstream region that appears to partially repress expression under low-iron conditions. Our findings reveal that MMT1 and MMT2 are induced under low-iron conditions and that the low-iron regulator Aft1 is required for this induction. We further uncover an Aft1-binding site in the MMT1 promoter sufficient for inducing MMT1 transcription and identify an MMT2 promoter region required for low iron induction.
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Affiliation(s)
- Liangtao Li
- Department of Pathology, Division of Microbiology and Immunology, University of Utah School of Medicine, Salt Lake City, Utah 84132
| | - Sophie Bertram
- Department of Pathology, Division of Microbiology and Immunology, University of Utah School of Medicine, Salt Lake City, Utah 84132
| | - Jerry Kaplan
- Department of Pathology, Division of Microbiology and Immunology, University of Utah School of Medicine, Salt Lake City, Utah 84132
| | - Xuan Jia
- Department of Pathology, Division of Microbiology and Immunology, University of Utah School of Medicine, Salt Lake City, Utah 84132
| | - Diane M Ward
- Department of Pathology, Division of Microbiology and Immunology, University of Utah School of Medicine, Salt Lake City, Utah 84132.
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8
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Yien YY, Shi J, Chen C, Cheung JTM, Grillo AS, Shrestha R, Li L, Zhang X, Kafina MD, Kingsley PD, King MJ, Ablain J, Li H, Zon LI, Palis J, Burke MD, Bauer DE, Orkin SH, Koehler CM, Phillips JD, Kaplan J, Ward DM, Lodish HF, Paw BH. FAM210B is an erythropoietin target and regulates erythroid heme synthesis by controlling mitochondrial iron import and ferrochelatase activity. J Biol Chem 2018; 293:19797-19811. [PMID: 30366982 DOI: 10.1074/jbc.ra118.002742] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [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: 03/05/2018] [Revised: 09/11/2018] [Indexed: 01/01/2023] Open
Abstract
Erythropoietin (EPO) signaling is critical to many processes essential to terminal erythropoiesis. Despite the centrality of iron metabolism to erythropoiesis, the mechanisms by which EPO regulates iron status are not well-understood. To this end, here we profiled gene expression in EPO-treated 32D pro-B cells and developing fetal liver erythroid cells to identify additional iron regulatory genes. We determined that FAM210B, a mitochondrial inner-membrane protein, is essential for hemoglobinization, proliferation, and enucleation during terminal erythroid maturation. Fam210b deficiency led to defects in mitochondrial iron uptake, heme synthesis, and iron-sulfur cluster formation. These defects were corrected with a lipid-soluble, small-molecule iron transporter, hinokitiol, in Fam210b-deficient murine erythroid cells and zebrafish morphants. Genetic complementation experiments revealed that FAM210B is not a mitochondrial iron transporter but is required for adequate mitochondrial iron import to sustain heme synthesis and iron-sulfur cluster formation during erythroid differentiation. FAM210B was also required for maximal ferrochelatase activity in differentiating erythroid cells. We propose that FAM210B functions as an adaptor protein that facilitates the formation of an oligomeric mitochondrial iron transport complex, required for the increase in iron acquisition for heme synthesis during terminal erythropoiesis. Collectively, our results reveal a critical mechanism by which EPO signaling regulates terminal erythropoiesis and iron metabolism.
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Affiliation(s)
- Yvette Y Yien
- From the Department of Biological Sciences, University of Delaware, Newark, Delaware 19716, .,the Division of Hematology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115
| | - Jiahai Shi
- the Whitehead Institute and Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Caiyong Chen
- the Division of Hematology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115
| | - Jesmine T M Cheung
- the Department of Chemistry and Biochemistry, UCLA, Los Angeles, California 90095
| | - Anthony S Grillo
- the Department of Chemistry and Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
| | - Rishna Shrestha
- the Department of Pathology, University of Utah School of Medicine, Salt Lake City, Utah 84112
| | - Liangtao Li
- the Department of Pathology, University of Utah School of Medicine, Salt Lake City, Utah 84112
| | - Xuedi Zhang
- From the Department of Biological Sciences, University of Delaware, Newark, Delaware 19716
| | - Martin D Kafina
- the Division of Hematology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115
| | - Paul D Kingsley
- the Center for Pediatric Biomedical Research, Department of Pediatrics, University of Rochester Medical Center, Rochester, New York 14642
| | - Matthew J King
- the Division of Hematology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115
| | - Julien Ablain
- the Division of Hematology-Oncology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts 02115
| | - Hojun Li
- the Whitehead Institute and Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Leonard I Zon
- the Division of Hematology-Oncology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts 02115.,the Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts 02115, and
| | - James Palis
- the Center for Pediatric Biomedical Research, Department of Pediatrics, University of Rochester Medical Center, Rochester, New York 14642
| | - Martin D Burke
- the Department of Chemistry and Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
| | - Daniel E Bauer
- the Division of Hematology-Oncology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts 02115.,the Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts 02115, and
| | - Stuart H Orkin
- the Division of Hematology-Oncology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts 02115.,the Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts 02115, and
| | - Carla M Koehler
- the Department of Chemistry and Biochemistry, UCLA, Los Angeles, California 90095
| | - John D Phillips
- the Division of Hematology and Hematologic Malignancy, University of Utah School of Medicine, Salt Lake City, Utah 84112
| | - Jerry Kaplan
- the Department of Pathology, University of Utah School of Medicine, Salt Lake City, Utah 84112
| | - Diane M Ward
- the Department of Pathology, University of Utah School of Medicine, Salt Lake City, Utah 84112
| | - Harvey F Lodish
- the Whitehead Institute and Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Barry H Paw
- the Division of Hematology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115.,the Division of Hematology-Oncology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts 02115.,the Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts 02115, and
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9
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Plaisancié J, Tarilonte M, Ramos P, Jeanton-Scaramouche C, Gaston V, Dollfus H, Aguilera D, Kaplan J, Fares-Taie L, Blanco-Kelly F, Villaverde C, Francannet C, Goldenberg A, Arroyo I, Rozet JM, Ayuso C, Chassaing N, Calvas P, Corton M. Implication of non-coding PAX6 mutations in aniridia. Hum Genet 2018; 137:831-846. [PMID: 30291432 DOI: 10.1007/s00439-018-1940-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [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: 07/09/2018] [Accepted: 09/23/2018] [Indexed: 01/14/2023]
Abstract
There is an increasing implication of non-coding regions in pathological processes of genetic origin. This is partly due to the emergence of sophisticated techniques that have transformed research into gene expression by allowing a more global understanding of the genome, both at the genomic, epigenomic and chromatin levels. Here, we implemented the analysis of PAX6, whose coding loss-of-function variants are mainly implied in aniridia, by studying its non-coding regions (untranslated regions, introns and cis-regulatory sequences). In particular, we have taken advantage of the development of high-throughput approaches to screen the upstream and downstream regulatory regions of PAX6 in 47 aniridia patients without identified mutation in the coding sequence. This was made possible through the use of custom targeted resequencing and/or CGH array to analyze the entire PAX6 locus on 11p13. We found candidate variants in 30 of the 47 patients. 9/30 correspond to the well-known described 3' deletions encompassing SIMO and other enhancer elements. In addition, we identified numerous different variants in various non-coding regions, in particular untranslated regions. Among these latter, most of them demonstrated an in vitro functional effect using a minigene strategy, and 12/21 are thus considered as causative mutations or very likely to explain the phenotypes. This new analysis strategy brings molecular diagnosis to more than 90% of our aniridia patients. This study revealed an outstanding mutation pattern in non-coding PAX6 regions confirming that PAX6 remains the major gene for aniridia.
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Affiliation(s)
- Julie Plaisancié
- Service de Génétique Médicale, Pavillon Lefebvre, Hôpital Purpan, CHU Toulouse, Place du Dr Baylac, 31059, Toulouse Cedex 9, France.
- INSERM U1056, Université Toulouse III, Toulouse, France.
| | - M Tarilonte
- Department of Genetics, Instituto de Investigacion Sanitaria-Fundacion Jimenez Diaz University Hospital-Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Center for Biomedical Network Research on Rare Diseases (CIBERER), ISCIII, Madrid, Spain
| | - P Ramos
- Department of Genetics, Instituto de Investigacion Sanitaria-Fundacion Jimenez Diaz University Hospital-Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Center for Biomedical Network Research on Rare Diseases (CIBERER), ISCIII, Madrid, Spain
| | - C Jeanton-Scaramouche
- Service de Génétique Médicale, Pavillon Lefebvre, Hôpital Purpan, CHU Toulouse, Place du Dr Baylac, 31059, Toulouse Cedex 9, France
| | - V Gaston
- Service de Génétique Médicale, Pavillon Lefebvre, Hôpital Purpan, CHU Toulouse, Place du Dr Baylac, 31059, Toulouse Cedex 9, France
| | - H Dollfus
- Centre de Référence pour les affections rares en génétique ophtalmologique, CARGO, Filière SENSGENE, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - D Aguilera
- Department of Genetics, Instituto de Investigacion Sanitaria-Fundacion Jimenez Diaz University Hospital-Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Center for Biomedical Network Research on Rare Diseases (CIBERER), ISCIII, Madrid, Spain
| | - J Kaplan
- Laboratoire de Génétique Ophtalmologique INSERM U1163, Institut Imagine, Paris, France
| | - L Fares-Taie
- Laboratoire de Génétique Ophtalmologique INSERM U1163, Institut Imagine, Paris, France
| | - F Blanco-Kelly
- Department of Genetics, Instituto de Investigacion Sanitaria-Fundacion Jimenez Diaz University Hospital-Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Center for Biomedical Network Research on Rare Diseases (CIBERER), ISCIII, Madrid, Spain
| | - C Villaverde
- Department of Genetics, Instituto de Investigacion Sanitaria-Fundacion Jimenez Diaz University Hospital-Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Center for Biomedical Network Research on Rare Diseases (CIBERER), ISCIII, Madrid, Spain
| | - C Francannet
- Service de Génétique Médicale, CHU Estaing, Clermont-Ferrand, France
| | - A Goldenberg
- Service de Génétique, CHU de Rouen, Centre Normand de Génomique Médicale et Médecine Personnalisée, Rouen, France
| | - I Arroyo
- Center for Biomedical Network Research on Rare Diseases (CIBERER), ISCIII, Madrid, Spain
- Department of Genetics, Hospital of Cáceres, Cáceres, Spain
| | - J M Rozet
- Laboratoire de Génétique Ophtalmologique INSERM U1163, Institut Imagine, Paris, France
| | - C Ayuso
- Department of Genetics, Instituto de Investigacion Sanitaria-Fundacion Jimenez Diaz University Hospital-Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Center for Biomedical Network Research on Rare Diseases (CIBERER), ISCIII, Madrid, Spain
| | - N Chassaing
- Service de Génétique Médicale, Pavillon Lefebvre, Hôpital Purpan, CHU Toulouse, Place du Dr Baylac, 31059, Toulouse Cedex 9, France
- INSERM U1056, Université Toulouse III, Toulouse, France
| | - P Calvas
- Service de Génétique Médicale, Pavillon Lefebvre, Hôpital Purpan, CHU Toulouse, Place du Dr Baylac, 31059, Toulouse Cedex 9, France
- INSERM U1056, Université Toulouse III, Toulouse, France
| | - M Corton
- Department of Genetics, Instituto de Investigacion Sanitaria-Fundacion Jimenez Diaz University Hospital-Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Center for Biomedical Network Research on Rare Diseases (CIBERER), ISCIII, Madrid, Spain
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10
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Ward DM, Chen OS, Li L, Kaplan J, Bhuiyan SA, Natarajan SK, Bard M, Cox JE. Altered sterol metabolism in budding yeast affects mitochondrial iron-sulfur (Fe-S) cluster synthesis. J Biol Chem 2018; 293:10782-10795. [PMID: 29773647 DOI: 10.1074/jbc.ra118.001781] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [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: 01/05/2018] [Revised: 05/11/2018] [Indexed: 01/05/2023] Open
Abstract
Ergosterol synthesis is essential for cellular growth and viability of the budding yeast Saccharomyces cerevisiae, and intracellular sterol distribution and homeostasis are therefore highly regulated in this species. Erg25 is an iron-containing C4-methyl sterol oxidase that contributes to the conversion of 4,4-dimethylzymosterol to zymosterol, a precursor of ergosterol. The ERG29 gene encodes an endoplasmic reticulum (ER)-associated protein, and here we identified a role for Erg29 in the methyl sterol oxidase step of ergosterol synthesis. ERG29 deletion resulted in lethality in respiring cells, but respiration-incompetent (Rho- or Rho0) cells survived, suggesting that Erg29 loss leads to accumulation of oxidized sterol metabolites that affect cell viability. Down-regulation of ERG29 expression in Δerg29 cells indeed led to accumulation of methyl sterol metabolites, resulting in increased mitochondrial oxidants and a decreased ability of mitochondria to synthesize iron-sulfur (Fe-S) clusters due to reduced levels of Yfh1, the mammalian frataxin homolog, which is involved in mitochondrial iron metabolism. Using a high-copy genomic library, we identified suppressor genes that permitted growth of Δerg29 cells on respiratory substrates, and these included genes encoding the mitochondrial proteins Yfh1, Mmt1, Mmt2, and Pet20, which reversed all phenotypes associated with loss of ERG29 Of note, loss of Erg25 also resulted in accumulation of methyl sterol metabolites and also increased mitochondrial oxidants and degradation of Yfh1. We propose that accumulation of toxic intermediates of the methyl sterol oxidase reaction increases mitochondrial oxidants, which affect Yfh1 protein stability. These results indicate an interaction between sterols generated by ER proteins and mitochondrial iron metabolism.
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Affiliation(s)
- Diane M Ward
- From the Department of Pathology, Division of Microbiology and Immunology, and
| | - Opal S Chen
- the DNA Sequencing Core, University of Utah School of Medicine, Salt Lake City, Utah 84132
| | - Liangtao Li
- From the Department of Pathology, Division of Microbiology and Immunology, and
| | - Jerry Kaplan
- From the Department of Pathology, Division of Microbiology and Immunology, and
| | - Shah Alam Bhuiyan
- the Department of Biology, Indiana University-Purdue University, Indianapolis, Indiana 46202, and
| | - Selvamuthu K Natarajan
- the Department of Biology, Indiana University-Purdue University, Indianapolis, Indiana 46202, and
| | - Martin Bard
- the Department of Biology, Indiana University-Purdue University, Indianapolis, Indiana 46202, and
| | - James E Cox
- the Department of Biochemistry and.,Metabolomics Core Research Facility, University of Utah School of Medicine, Salt Lake City, Utah 84112
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11
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Plaisancié J, Ragge N, Dollfus H, Kaplan J, Lehalle D, Francannet C, Morin G, Colineaux H, Calvas P, Chassaing N. FOXE3
mutations: genotype-phenotype correlations. Clin Genet 2018; 93:837-845. [DOI: 10.1111/cge.13177] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Revised: 08/21/2017] [Accepted: 08/22/2017] [Indexed: 01/25/2023]
Affiliation(s)
- J. Plaisancié
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse; Toulouse France
- INSERM U1056; Université Toulouse III; Toulouse France
| | - N.K. Ragge
- Faculty of Health and Life Sciences; Oxford Brookes University; Oxford UK
- West Midlands Regional Genetics Service; Birmingham Women and Children’s NHS Foundation Trust; Birmingham UK
| | - H. Dollfus
- Centre de Référence pour les affections rares en génétique ophtalmologique; CARGO, Filière SENSGENE, Hôpitaux Universitaires de Strasbourg; Strasbourg France
| | - J. Kaplan
- INSERM U1163; Génétique Ophtalmologique; Paris France
| | - D. Lehalle
- Centre de Génétique et Centre de Référence "Anomalies du Développement et Syndromes Malformatifs; Hôpital d'Enfants; Dijon France
| | - C. Francannet
- Service de Génétique Médicale; CHU Estaing; Clermont-Ferrand France
| | - G. Morin
- Service de génétique; Hôpital nord d’Amiens; Amiens France
| | - H. Colineaux
- Department of Epidemiology, Health Economics and Public Health; Toulouse University Hospital; France
- LEASP UMR1027, INSERM; Université Toulouse III; Toulouse France
| | - P. Calvas
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse; Toulouse France
- INSERM U1056; Université Toulouse III; Toulouse France
| | - N. Chassaing
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse; Toulouse France
- INSERM U1056; Université Toulouse III; Toulouse France
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12
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Souied EH, Rozet JM, Gerber S, Dufier JL, Soubrane G, Coscas G, Munnich A, Kaplan J. Two Novel Missense Mutations in the Peripherin/RDS Gene in two Unrelated French Patients with Autosomal Dominant Retinitis Pigmentosa. Eur J Ophthalmol 2018; 8:98-101. [PMID: 9673478 DOI: 10.1177/112067219800800208] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Purpose To report the identification of two novel RDS mutations in the peripherin/RDS gene of two unrelated French patients affected by autosomal dominant retinitis pigmentosa (ADRP). Methods Fifty-eight unrelated patients affected by ADRP were analyzed. Our diagnostic criteria for RP were bilateral fundus involvement, concentric depression of the visual field and severe involvement on electroretinogram. Transmission of the trait was unambiguous. Our strategy was to analyze the coding sequence of the gene using a combination of single-strand conformation polymorphism (SSCP) and direct sequence analysis of the exons of the gene. Exons that displayed conformational polymorphisms were sequenced on an automated DNA sequencer. Results The sequence analyses revealed two previously unreported missense mutations: Cys165Tyr and Phe211Leu in exons 1 and 2, respectively. None of the 70 controls analyzed carried these base changes. Cosegregation of the base substitution with the disease could be tested in both families presenting the Cys165Tyr and Phe211Leu mutations. Conclusions Several lines of evidence support the idea that these base substitutions are disease-causing mutations. To the best of our knowledge, no peripherin/RDS gene analysis has been previously reported in ADRP in France.
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Affiliation(s)
- E H Souied
- Service de Génétique I'Enfant INSERM-U-393 Hôpital des Enfants-Malades, Paris
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13
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Malca N, Serror K, Mimoun M, Chatelain S, Kaplan J, Chaouat M, Marco O, Boccara D. Our 35 years' experience on postburn heterotopic ossification: A three-step treatment. ANN CHIR PLAST ESTH 2018; 63:316-322. [PMID: 29289387 DOI: 10.1016/j.anplas.2017.11.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 09/25/2017] [Accepted: 11/30/2017] [Indexed: 11/18/2022]
Abstract
Our retrospective study of burn patients presents a three-step treatment of heterotopic ossification: excision surgery, early rehabilitation, and analgesia. We included patients admitted to the department for treatment of postburn heterotopic ossification between January 1, 1979, and September 30, 2015. The mean age at the time of the burn was 43.3 years. Men accounted for the majority of burn patients who developed an osteoma (70.8%). The mean total skin area burned was 38.4%. No osteoma justifying surgery was found for any patient with a total burned skin area less than 19%. The burned zones were related to the osteoma development in 94.3% of cases. On average, the surgery took place 10.8 months after the burn. The osteotomy was accompanied by surgical treatment of a contracture in 37.1% of patients. Most of the osteomata were found at the elbows (30), followed by the shoulders (3), and finally the knees (2). Rehabilitation began on D0 after the surgery, except if a flap or a thin-skin graft was used. Regarding analgesia, opiates were prescribed systematically during the immediate postoperative period. Elbow range of motion on flexion improved by a mean of 84.1°. During the postoperative period, we found 2 recurrences of osteoma and 1 elbow hematoma in two separate patients. There were no postoperative infections or neurological sequelae. Our retrospective French study confirmed results found in the international literature. The three-step treatment - excision surgery, early rehabilitation, and antalgia - seems to be the best means of treating osteoma with satisfactory results. Surgery is indicated only in the case of functional impairment and not simply based on imaging.
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Affiliation(s)
- N Malca
- Department of plastic surgery, Burn center (centre de traitement des brûlés), hôpital Saint-Louis, 1, avenue Claude-Vellefaux, 75010 Paris, France.
| | - K Serror
- Department of plastic surgery, Burn center (centre de traitement des brûlés), hôpital Saint-Louis, 1, avenue Claude-Vellefaux, 75010 Paris, France
| | - M Mimoun
- Department of plastic surgery, Burn center (centre de traitement des brûlés), hôpital Saint-Louis, 1, avenue Claude-Vellefaux, 75010 Paris, France
| | - S Chatelain
- Department of plastic surgery, Burn center (centre de traitement des brûlés), hôpital Saint-Louis, 1, avenue Claude-Vellefaux, 75010 Paris, France
| | - J Kaplan
- NewYork-Presbyterian hospital, Columbia university medical center, New York, USA
| | - M Chaouat
- Department of plastic surgery, Burn center (centre de traitement des brûlés), hôpital Saint-Louis, 1, avenue Claude-Vellefaux, 75010 Paris, France
| | - O Marco
- Department of plastic surgery, Burn center (centre de traitement des brûlés), hôpital Saint-Louis, 1, avenue Claude-Vellefaux, 75010 Paris, France
| | - D Boccara
- Department of plastic surgery, Burn center (centre de traitement des brûlés), hôpital Saint-Louis, 1, avenue Claude-Vellefaux, 75010 Paris, France
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14
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Luca R, Rizzo M, Mando P, Perez de La Puente C, Blanco A, Rivero S, Lutter G, Cappuccio F, Amat M, Kaplan J, Chacon R, Chacon M. Independent prognostic impact of lympho-vascular invasion in cutaneous melanoma patients with sentinel lymph node biopsy. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx377.024] [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: 11/14/2022] Open
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15
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Seguin A, Takahashi-Makise N, Yien YY, Huston NC, Whitman JC, Musso G, Wallace JA, Bradley T, Bergonia HA, Kafina MD, Matsumoto M, Igarashi K, Phillips JD, Paw BH, Kaplan J, Ward DM. Reductions in the mitochondrial ABC transporter Abcb10 affect the transcriptional profile of heme biosynthesis genes. J Biol Chem 2017; 292:16284-16299. [PMID: 28808058 DOI: 10.1074/jbc.m117.797415] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 08/09/2017] [Indexed: 11/06/2022] Open
Abstract
ATP-binding cassette subfamily B member 10 (Abcb10) is a mitochondrial ATP-binding cassette (ABC) transporter that complexes with mitoferrin1 and ferrochelatase to enhance heme biosynthesis in developing red blood cells. Reductions in Abcb10 levels have been shown to reduce mitoferrin1 protein levels and iron import into mitochondria, resulting in reduced heme biosynthesis. As an ABC transporter, Abcb10 binds and hydrolyzes ATP, but its transported substrate is unknown. Here, we determined that decreases in Abcb10 did not result in protoporphyrin IX accumulation in morphant-treated zebrafish embryos or in differentiated Abcb10-specific shRNA murine Friend erythroleukemia (MEL) cells in which Abcb10 was specifically silenced with shRNA. We also found that the ATPase activity of Abcb10 is necessary for hemoglobinization in MEL cells, suggesting that the substrate transported by Abcb10 is important in mediating increased heme biosynthesis during erythroid development. Inhibition of 5-aminolevulinic acid dehydratase (EC 4.2.1.24) with succinylacetone resulted in both 5-aminolevulinic acid (ALA) accumulation in control and Abcb10-specific shRNA MEL cells, demonstrating that reductions in Abcb10 do not affect ALA export from mitochondria and indicating that Abcb10 does not transport ALA. Abcb10 silencing resulted in an alteration in the heme biosynthesis transcriptional profile due to repression by the transcriptional regulator Bach1, which could be partially rescued by overexpression of Alas2 or Gata1, providing a mechanistic explanation for why Abcb10 shRNA MEL cells exhibit reduced hemoglobinization. In conclusion, our findings rule out that Abcb10 transports ALA and indicate that Abcb10's ATP-hydrolysis activity is critical for hemoglobinization and that the substrate transported by Abcb10 provides a signal that optimizes hemoglobinization.
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Affiliation(s)
- Alexandra Seguin
- From the Division of Microbiology and Immunology, Department of Pathology, and
| | | | | | | | | | - Gabriel Musso
- the Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115
| | - Jared A Wallace
- From the Division of Microbiology and Immunology, Department of Pathology, and
| | - Thomas Bradley
- From the Division of Microbiology and Immunology, Department of Pathology, and
| | - Hector A Bergonia
- the Division of Hematology-Oncology, Department of Medicine, University of Utah School of Medicine, Salt Lake City, Utah 84132
| | | | - Mitsuyo Matsumoto
- the Department of Biochemistry, Tohoku University Graduate School of Medicine, Sendai 980-8576, Japan
| | - Kazuhiko Igarashi
- the Department of Biochemistry, Tohoku University Graduate School of Medicine, Sendai 980-8576, Japan
| | - John D Phillips
- the Division of Hematology-Oncology, Department of Medicine, University of Utah School of Medicine, Salt Lake City, Utah 84132
| | - Barry H Paw
- the Division of Hematology and.,the Division of Hematology-Oncology, Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts 02115, and.,the Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts 02115
| | - Jerry Kaplan
- From the Division of Microbiology and Immunology, Department of Pathology, and
| | - Diane M Ward
- From the Division of Microbiology and Immunology, Department of Pathology, and
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16
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Li L, Kaplan J, Ward DM. The glucose sensor Snf1 and the transcription factors Msn2 and Msn4 regulate transcription of the vacuolar iron importer gene CCC1 and iron resistance in yeast. J Biol Chem 2017; 292:15577-15586. [PMID: 28760824 DOI: 10.1074/jbc.m117.802504] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [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: 06/15/2017] [Revised: 07/21/2017] [Indexed: 12/30/2022] Open
Abstract
The budding yeast Saccharomyces cerevisiae stores iron in the vacuole, which is a major resistance mechanism against iron toxicity. One key protein involved in vacuolar iron storage is the iron importer Ccc1, which facilitates iron entry into the vacuole. Transcription of the CCC1 gene is largely regulated by the binding of iron-sulfur clusters to the activator domain of the transcriptional activator Yap5. Additional evidence, however, suggests that Yap5-independent transcriptional activation of CCC1 also contributes to iron resistance. Here, we demonstrate that components of the signaling pathway involving the low-glucose sensor Snf1 regulate CCC1 transcription and iron resistance. We found that SNF1 deletion acts synergistically with YAP5 deletion to regulate CCC1 transcription and iron resistance. A kinase-dead mutation of Snf1 lowered iron resistance as did deletion of SNF4, which encodes a partner protein of Snf1. Deletion of all three alternative partners of Snf1 encoded by SIT1, SIT2, and GAL83 decreased both CCC1 transcription and iron resistance. The Snf1 complex is known to activate the general stress transcription factors Msn2 and Msn4. We show that Msn2 and Msn4 contribute to Snf1-mediated CCC1 transcription. Of note, SNF1 deletion in combination with MSN2 and MSN4 deletion resulted in additive effects on CCC1 transcription, suggesting that other activators contribute to the regulation of CCC1 transcription. In conclusion, we show that yeast have developed multiple transcriptional mechanisms to regulate Ccc1 expression and to protect against high cytosolic iron toxicity.
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Affiliation(s)
- Liangtao Li
- From the Department of Pathology, Division of Microbiology and Immunology, School of Medicine, University of Utah, Salt Lake City, Utah 84132-2501
| | - Jerry Kaplan
- From the Department of Pathology, Division of Microbiology and Immunology, School of Medicine, University of Utah, Salt Lake City, Utah 84132-2501
| | - Diane M Ward
- From the Department of Pathology, Division of Microbiology and Immunology, School of Medicine, University of Utah, Salt Lake City, Utah 84132-2501
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17
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Kaplan J, Gordon L, Infante J, Popat R, Rambaldi A, Madan S, Patel M, Gritti G, El-Sharkawi D, Chau I, Radford J, Perez De Oteyza J, Zinzani P, Iyer S, Faucette S, Sheldon-Waniga E, Stumpo K, Shou Y, Carpio C, Bosch F. TAK-659, AN INVESTIGATIONAL REVERSIBLE DUAL SYK/FLT-3 INHIBITOR, IN PATIENTS WITH LYMPHOMA: UPDATED RESULTS FROM DOSE-ESCALATION AND EXPANSION COHORTS OF a PHASE 1 STUDY. Hematol Oncol 2017. [DOI: 10.1002/hon.2437_60] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- J. Kaplan
- Department of Medicine; Northwestern University; Chicago USA
| | - L. Gordon
- Robert H Lurie Comprehensive Cancer Center; Northwestern University Feinberg School of Medicine; Chicago USA
| | - J. Infante
- Drug Development Unit; Sarah Cannon Research Institute/Tennessee Oncology; Nashville USA
| | - R. Popat
- NIHR Clinical Research Facility; UCLH; London UK
| | - A. Rambaldi
- Dipartimento di Oncologia ed Emato-Oncologia / Hematology and Bone Marrow Transplant Unit; Università degli Studi di Milano / Ospedale Papa Giovanni XXII; Bergamo Italy
| | - S. Madan
- Dipartimento di Oncologia ed Emato-Oncologia/Hematology and Bone Marrow Transplant Unit; Università degli Studi di Milano/Ospedale Papa Giovanni XXIII; Bergamo Italy
| | - M.R. Patel
- Hematology-Oncology; Florida Cancer Specialists/Sarah Cannon Research Institute; Sarasota USA
| | - G. Gritti
- Hematology and Bone Marrow Transplant Unit; Ospedale Papa Giovanni XXIII; Bergamo Italy
| | - D. El-Sharkawi
- Haematology; NIHR UCLH Clinical Research Facility; London UK
| | - I. Chau
- Department of Medicine; Royal Marsden Hospital; Surrey UK
| | - J. Radford
- Manchester Academic Health Science Centre; University of Manchester and the Christie NHS Foundation Trust; Manchester UK
| | | | - P. Zinzani
- Hematology, Institute of Hematology “Seragnoli”; University of Bologna; Bologna Italy
| | - S. Iyer
- Advanced Therapeutics, Institute of Academic Medicine; Houston Methodist Cancer Center; Houston USA
| | - S. Faucette
- Clinical Pharmacology; Takeda Pharmaceuticals International Co.; Cambridge USA
| | | | - K. Stumpo
- Oncology Clinical Research; Takeda Pharmaceuticals; Cambridge USA
| | - Y. Shou
- Oncology Clinical Research; Takeda Pharmaceuticals International Co.; Cambridge USA
| | - C. Carpio
- Hematology; University Hospital Vall d'Hebron; Barcelona Spain
| | - F. Bosch
- Hematology; University Hospital Vall d'Hebron; Barcelona Spain
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18
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Casasnovas R, Westin J, Thieblemont C, Zijlstra J, Hill B, De La Cruz Vicente F, Choquet S, Caimi P, Kaplan J, Canales M, Kuruvilla J, Follows G, van den Neste E, Meade J, Wrigley B, Devlin M, Saint-Martin J, Nippgen C, Gardner H, Shacham S, Kauffman M, Maerevoet M. A PHASE 2B RANDOMIZED STUDY OF SINGLE AGENT SELINEXOR IN PATIENTS WITH RELAPSED/REFRACTORY DIFFUSE LARGE B-CELL LYMPHOMA (DLBCL). Hematol Oncol 2017. [DOI: 10.1002/hon.2438_53] [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] [Indexed: 11/06/2022]
Affiliation(s)
| | - J. Westin
- Lymphoma & Myeloma, MD Anderson Cancer Center; Houston USA
| | - C. Thieblemont
- APHP, Hemato-Oncology; Hopital Saint-Louis; Paris France
| | - J. Zijlstra
- Lunenburg Lymphoma Phase-I Consortium; VU University Medical Center; Amsterdam The Netherlands
| | - B. Hill
- Taussig Cancer Institute; Cleveland Clinic; Cleveland USA
| | | | - S. Choquet
- Hematology; Hospital Pitie Salpetriere; Paris France
| | - P. Caimi
- Seidman Cancer Center; University Hospital; Cleveland USA
| | - J. Kaplan
- Feinberg School of Medicine; Northwestern University; Chicago USA
| | - M. Canales
- Hematology; Hospital Universitario La Paz; Madrid Spain
| | - J. Kuruvilla
- Hematology; Princess Margaret Hospital; Toronto Canada
| | - G. Follows
- NHS Foundation Trust; Cambridge University Teaching Hospitals; Cambridge UK
| | - E. van den Neste
- Hematology; Cliniques Universitaires UCL Saint-Luc; Brussels Belgium
| | - J. Meade
- Clinical, Karyopharm Therapeutics; Newton USA
| | - B. Wrigley
- Clinical, Karyopharm Therapeutics; Newton USA
| | - M. Devlin
- Clinical, Karyopharm Therapeutics; Newton USA
| | | | - C. Nippgen
- Clinical, Karyopharm Therapeutics; Newton USA
| | - H. Gardner
- Clinical, Karyopharm Therapeutics; Newton USA
| | - S. Shacham
- Clinical, Karyopharm Therapeutics; Newton USA
| | - M. Kauffman
- Clinical, Karyopharm Therapeutics; Newton USA
| | - M. Maerevoet
- Hematology; Institute Jules Bordet; Brussels Belgium
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19
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Chung J, Wittig JG, Ghamari A, Maeda M, Dailey TA, Bergonia H, Kafina MD, Coughlin EE, Minogue CE, Hebert AS, Li L, Kaplan J, Lodish HF, Bauer DE, Orkin SH, Cantor AB, Maeda T, Phillips JD, Coon JJ, Pagliarini DJ, Dailey HA, Paw BH. Erythropoietin signaling regulates heme biosynthesis. eLife 2017; 6. [PMID: 28553927 PMCID: PMC5478267 DOI: 10.7554/elife.24767] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [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: 12/30/2016] [Accepted: 05/28/2017] [Indexed: 11/13/2022] Open
Abstract
Heme is required for survival of all cells, and in most eukaryotes, is produced through a series of eight enzymatic reactions. Although heme production is critical for many cellular processes, how it is coupled to cellular differentiation is unknown. Here, using zebrafish, murine, and human models, we show that erythropoietin (EPO) signaling, together with the GATA1 transcriptional target, AKAP10, regulates heme biosynthesis during erythropoiesis at the outer mitochondrial membrane. This integrated pathway culminates with the direct phosphorylation of the crucial heme biosynthetic enzyme, ferrochelatase (FECH) by protein kinase A (PKA). Biochemical, pharmacological, and genetic inhibition of this signaling pathway result in a block in hemoglobin production and concomitant intracellular accumulation of protoporphyrin intermediates. Broadly, our results implicate aberrant PKA signaling in the pathogenesis of hematologic diseases. We propose a unifying model in which the erythroid transcriptional program works in concert with post-translational mechanisms to regulate heme metabolism during normal development. DOI:http://dx.doi.org/10.7554/eLife.24767.001 Heme is an iron-containing compound that is important for all living things, from bacteria to humans. Our red blood cells use heme to carry oxygen and deliver it throughout the body. The amount of heme that is produced must be tightly regulated. Too little or too much heme in a person’s red blood cells can lead to blood-related diseases such as anemia and porphyria. Yet, while scientists knew the enzymes needed to make heme, they did not know how these enzymes were controlled. Now, Chung et al. show that an important signaling molecule called erythropoietin controls how much heme is produced when red blood cells are made. The experiments used a combination of red blood cells from humans and mice as well as zebrafish, which are useful model organisms because their blood develops in a similar way to humans. When Chung et al. inhibited components of erythropoietin signaling, heme production was blocked too and the red blood cells could not work properly. These new findings pave the way to look at human patients with blood-related disorders to determine if they have defects in the erythropoietin signaling cascade. In the future, this avenue of research might lead to better treatments for a variety of blood diseases in humans. DOI:http://dx.doi.org/10.7554/eLife.24767.002
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Affiliation(s)
- Jacky Chung
- Division of Hematology, Brigham and Women's Hospital, Harvard Medical School, Boston, United States
| | - Johannes G Wittig
- Division of Hematology, Brigham and Women's Hospital, Harvard Medical School, Boston, United States
| | - Alireza Ghamari
- Division of Hematology-Oncology, Boston Children's Hospital, Harvard Medical School, Boston, United States
| | - Manami Maeda
- Division of Hematology, Brigham and Women's Hospital, Harvard Medical School, Boston, United States
| | - Tamara A Dailey
- Department of Microbiology, University of Georgia, Athens, United States.,Department of Biochemistry and Molecular Biology, University of Georgia, Athens, United States
| | - Hector Bergonia
- Division of Hematology and Hematologic Malignancies, University of Utah School of Medicine, Salt Lake City, United States
| | - Martin D Kafina
- Division of Hematology, Brigham and Women's Hospital, Harvard Medical School, Boston, United States
| | | | - Catherine E Minogue
- Department of Chemistry, University of Wisconsin-Madison, Madison, United States
| | | | - Liangtao Li
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, United States
| | - Jerry Kaplan
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, United States
| | - Harvey F Lodish
- Whitehead Institute for Biomedical Research, Massachusetts Institute of Technology, Cambridge, United States
| | - Daniel E Bauer
- Division of Hematology-Oncology, Boston Children's Hospital, Harvard Medical School, Boston, United States.,Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, United States
| | - Stuart H Orkin
- Division of Hematology-Oncology, Boston Children's Hospital, Harvard Medical School, Boston, United States.,Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, United States
| | - Alan B Cantor
- Division of Hematology-Oncology, Boston Children's Hospital, Harvard Medical School, Boston, United States.,Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, United States
| | - Takahiro Maeda
- Division of Hematology, Brigham and Women's Hospital, Harvard Medical School, Boston, United States
| | - John D Phillips
- Division of Hematology and Hematologic Malignancies, University of Utah School of Medicine, Salt Lake City, United States
| | - Joshua J Coon
- Genome Center of Wisconsin, Madison, United States.,Department of Chemistry, University of Wisconsin-Madison, Madison, United States.,Department of Biomolecular Chemistry, University of Wisconsin-Madison, Madison, United States
| | - David J Pagliarini
- Department of Biochemistry, University of Wisconsin-Madison, Madison, United States
| | - Harry A Dailey
- Department of Microbiology, University of Georgia, Athens, United States.,Department of Biochemistry and Molecular Biology, University of Georgia, Athens, United States
| | - Barry H Paw
- Division of Hematology, Brigham and Women's Hospital, Harvard Medical School, Boston, United States.,Division of Hematology-Oncology, Boston Children's Hospital, Harvard Medical School, Boston, United States.,Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, United States
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Yaish HM, Farrell CP, Christensen RD, MacQueen BC, Jackson LK, Trochez-Enciso J, Kaplan J, Ward DM, Salah WK, Phillips JD. Two novel mutations in TMPRSS6 associated with iron-refractory iron deficiency anemia in a mother and child. Blood Cells Mol Dis 2017; 65:38-40. [PMID: 28460265 DOI: 10.1016/j.bcmd.2017.04.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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: 02/10/2017] [Revised: 04/07/2017] [Accepted: 04/08/2017] [Indexed: 01/06/2023]
Abstract
In an iron deficient child, oral iron repeatedly failed to improve the condition. Whole exome sequencing identified one previously reported plus two novel mutation in the TMPRSS6 gene, with no mutations in other iron-associated genes. We propose that these mutations result in a novel variety of iron-refractory iron deficiency anemia.
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Affiliation(s)
- Hassan M Yaish
- Division of Hematology/Oncology, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, USA.
| | - Colin P Farrell
- Center for Iron and Heme Disorders, University of Utah, and Division of Hematology/Oncology, Department of Medicine and Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Robert D Christensen
- Division of Hematology/Oncology, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, USA; Division of Neonatology, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Brianna C MacQueen
- Division of Neonatology, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Laurie K Jackson
- Center for Iron and Heme Disorders, University of Utah, and Division of Hematology/Oncology, Department of Medicine and Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Jesus Trochez-Enciso
- Center for Iron and Heme Disorders, University of Utah, and Division of Hematology/Oncology, Department of Medicine and Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Jerry Kaplan
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Diane M Ward
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Walid K Salah
- Division of Hematology/Oncology, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - John D Phillips
- Center for Iron and Heme Disorders, University of Utah, and Division of Hematology/Oncology, Department of Medicine and Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT, USA; Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT, USA
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21
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MacQueen BC, Christensen RD, Ward DM, Bennett ST, O’Brien EA, Sheffield MJ, Baer VL, Snow GL, Lewis KAW, Fleming RE, Kaplan J. The iron status at birth of neonates with risk factors for developing iron deficiency: a pilot study. J Perinatol 2017; 37:436-440. [PMID: 27977019 PMCID: PMC5389916 DOI: 10.1038/jp.2016.234] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [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: 07/27/2016] [Revised: 10/25/2016] [Accepted: 11/07/2016] [Indexed: 01/28/2023]
Abstract
OBJECTIVE Small-for-gestational-age (SGA) neonates, infants of diabetic mothers (IDM) and very-low-birth weight premature neonates (VLBW) are reported to have increased risk for developing iron deficiency and possibly associated neurocognitive delays. STUDY DESIGN We conducted a pilot study to assess iron status at birth in at-risk neonates by measuring iron parameters in umbilical cord blood from SGA, IDM, VLBW and comparison neonates. RESULTS Six of the 50 infants studied had biochemical evidence of iron deficiency at birth. Laboratory findings consistent with iron deficiency were found in one SGA, one IDM, three VLBW, and one comparison infant. None of the infants had evidence of iron deficiency anemia. CONCLUSIONS Evidence of biochemical iron deficiency at birth was found in 17% of screened neonates. Studies are needed to determine whether these infants are at risk for developing iron-limited erythropoiesis, iron deficiency anemia or iron-deficient neurocognitive delay.
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Affiliation(s)
- BC MacQueen
- Division of Neonatology, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - RD Christensen
- Division of Neonatology, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, USA,Women and Newborn’s Clinical Program, Intermountain Healthcare, Salt Lake City, UT, USA,Division of Hematology/Oncology, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - DM Ward
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - ST Bennett
- Department of Pathology, Intermountain Medical Center, Murray, KY, USA
| | - EA O’Brien
- Division of Neonatology, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, USA,Women and Newborn’s Clinical Program, Intermountain Healthcare, Salt Lake City, UT, USA
| | - MJ Sheffield
- Women and Newborn’s Clinical Program, Intermountain Healthcare, Salt Lake City, UT, USA
| | - VL Baer
- Women and Newborn’s Clinical Program, Intermountain Healthcare, Salt Lake City, UT, USA
| | - GL Snow
- Statistical Data Center, LDS Hospital, Salt Lake City, UT, USA
| | - KA Weaver Lewis
- Women and Newborn’s Clinical Program, Intermountain Healthcare, Salt Lake City, UT, USA
| | - RE Fleming
- Department of Pediatrics and Edward A. Doisy Department of Biochemistry and Molecular Biology, St Louis University, St Louis, MO, USA
| | - J Kaplan
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT, USA
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Stinson S, He J, Hollenback D, Jia J, Kaplan J, Venkataramani C, Babusis D, Guevara F, Nelson T, Cavanaugh J, Asahina H, Ray A, Sicinska E, Fuchs C, Barbie D, Wong K, Ng K, Dornan D. Anti-tumor activity of a TBK1/IKBKE inhibitor in combination with a MEK inhibitor in KRAS mutant colorectal and non-small cell lung cancer models. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)33033-7] [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: 11/30/2022]
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Abstract
How will AI affect the law?
AI will significantly impact a wide variety of human activities and have a dramatic influence on many fields, professions, and markets. Any attempt to catalog these would necessarily be incomplete and go quickly out of date, so I...
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Abstract
What is the philosophy of AI?
You might wonder why a field like AI seems to attract so much controversy. After all, other engineering disciplines—such as civil, mechanical, or electrical engineering—aren’t typically the target of vociferous criticism from various branches of the humanities. Largely,...
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Abstract
What is artificial intelligence?
That’s an easy question to ask and a hard one to answer—for two reasons. First, there’s little agreement about what intelligence is. Second, there’s scant reason to believe that machine intelligence bears much relationship to human intelligence, at least so...
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Abstract
What are the main areas of research and development in AI?
Work in artificial intelligence is generally divided into a number of subfields that address common, though difficult, practical problems or require different tools or skills. Some of the more prominent are robotics, computer...
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Kaplan J. The Impact of Artificial Intelligence on Human Labor. ARTIF INTELL 2016. [DOI: 10.1093/wentk/9780190602383.003.0006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Are robots going to take away our jobs?
While it’s tempting to think of AI systems in general, and robots in particular, as mechanical laborers competing for employment, this isn’t a helpful perspective from which to explore their impact on labor markets. The image...
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Kaplan J. Possible Future Impacts of Artificial Intelligence. ARTIF INTELL 2016. [DOI: 10.1093/wentk/9780190602383.003.0008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Is progress in AI accelerating?
Not all subfields of AI proceed at the same pace, in part because they build on progress in other fields. For example, improvements in the physical capabilities of robots have been relatively slow, since they are dependent on advances...
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Kaplan J. The Impact of Artificial Intelligence on Social Equity. ARTIF INTELL 2016. [DOI: 10.1093/wentk/9780190602383.003.0007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Who’s going to benefit from this technological revolution?
Unfortunately, AI is accelerating the substitution of capital for labor, and so those with capital will benefit at the expense of those whose primary asset is their ability to work. Income inequality is already a pressing...
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Kaplan J. The Intellectual History of Artificial Intelligence. ARTIF INTELL 2016. [DOI: 10.1093/wentk/9780190602383.003.0002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Where did the term artificial intelligence come from?
The first use of “artificial intelligence” can be attributed to a specific individual—John McCarthy, in 1956 an assistant professor of mathematics at Dartmouth College in Hanover, New Hampshire. Along with three other, more senior researchers (Marvin...
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Lenaers G, Charif M, Amati-Bonneau P, Chao de la Barca J, Procaccio V, Gerber S, Kaplan J, Roubertie A, Meunier I, Reynier P, Rozet J, Hamel C, Bonneau D. The genetic pathophysiology of dominant optic atrophy. Acta Ophthalmol 2016. [DOI: 10.1111/j.1755-3768.2016.0117] [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: 11/29/2022]
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Rozet J, Fares-Taïe L, Chassaing N, Gerber S, Kaplan J, Ragge N, Calvas P. Specific gene in microphthalmia. Acta Ophthalmol 2016. [DOI: 10.1111/j.1755-3768.2016.0157] [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: 11/28/2022]
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Calvas P, Davis E, Ragge N, Fares-Taïe L, Srour M, Michaud J, Kaplan J, Rozet J, Chassaing N. Genetics in microphthalmia. Acta Ophthalmol 2016. [DOI: 10.1111/j.1755-3768.2016.0056] [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: 11/28/2022]
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34
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Perrault I, Halbritter J, Porath J, Gerard X, Braun D, Gee H, Fathy H, Saunier S, Cormier-Daire V, Thomas S, Attié-Bitach T, Boddaert N, Taschner M, Schueler M, Lorentzen E, Lifton R, Otto E, Bastin P, Kaplan J, Hildebrandt F, Rozet JM. Mutations of IFT81, encoding an IFT-B core protein, as a rare cause of a ciliopathy. Cilia 2015. [PMCID: PMC4519174 DOI: 10.1186/2046-2530-4-s1-p7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Calvas P, Chassaing N, Kaplan J, Rozet J. Syndromic manifestations in aniridia patients with PAX6 point mutations. Acta Ophthalmol 2015. [DOI: 10.1111/j.1755-3768.2015.0050] [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] [Indexed: 11/28/2022]
Affiliation(s)
| | - N. Chassaing
- Génétique Médicale; CHU & Université de Toulouse; Toulouse France
| | - J. Kaplan
- Institut Imagine- UMR1163 INSER-Univ Paris V; Laboratory of Ophthalmic Genetics; Paris France
| | - J.M. Rozet
- Institut IMAGINE- UMR1163 INSERM-Univ Paris V; Laboratory of Ophtalmic Genetics; Paris France
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Kamm J, Bailey K, Kaplan J, McConnell J, Ardolf B, Jaramillo J, Westhafer J, Boyars L, Zartman A. NEUROLOGICAL AND NEUROPSYCHIATRIC DISORDERS: TRAUMATIC BRAIN INJURYA-23Non-Neuropsychology Providers' Perception of Terminology, Recovery Time, and Treatment Needs in Mild Traumatic Brain Injury. Arch Clin Neuropsychol 2015. [DOI: 10.1093/arclin/acv047.23] [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: 11/13/2022] Open
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Kaplan J, Zartman A. B-17Performance on the Pillbox Test is Associated with a Neurocognitive Etiology. Arch Clin Neuropsychol 2015. [DOI: 10.1093/arclin/acv047.113] [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: 11/12/2022] Open
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39
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Perrault I, Hanein S, Nicouleau M, Saunier S, Bole C, Nitschké P, Xerri O, Delphin N, Munnich A, Kaplan J, Rozet JM. Ciliome resequencing: A lifeline for molecular diagnosis in LCA. Cilia 2015. [PMCID: PMC4519145 DOI: 10.1186/2046-2530-4-s1-p55] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Yien YY, Robledo RF, Schultz IJ, Takahashi-Makise N, Gwynn B, Bauer DE, Dass A, Yi G, Li L, Hildick-Smith GJ, Cooney JD, Pierce EL, Mohler K, Dailey TA, Miyata N, Kingsley PD, Garone C, Hattangadi SM, Huang H, Chen W, Keenan EM, Shah DI, Schlaeger TM, DiMauro S, Orkin SH, Cantor AB, Palis J, Koehler CM, Lodish HF, Kaplan J, Ward DM, Dailey HA, Phillips JD, Peters LL, Paw BH. TMEM14C is required for erythroid mitochondrial heme metabolism. J Clin Invest 2014; 124:4294-304. [PMID: 25157825 DOI: 10.1172/jci76979] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Accepted: 07/17/2014] [Indexed: 12/15/2022] Open
Abstract
The transport and intracellular trafficking of heme biosynthesis intermediates are crucial for hemoglobin production, which is a critical process in developing red cells. Here, we profiled gene expression in terminally differentiating murine fetal liver-derived erythroid cells to identify regulators of heme metabolism. We determined that TMEM14C, an inner mitochondrial membrane protein that is enriched in vertebrate hematopoietic tissues, is essential for erythropoiesis and heme synthesis in vivo and in cultured erythroid cells. In mice, TMEM14C deficiency resulted in porphyrin accumulation in the fetal liver, erythroid maturation arrest, and embryonic lethality due to profound anemia. Protoporphyrin IX synthesis in TMEM14C-deficient erythroid cells was blocked, leading to an accumulation of porphyrin precursors. The heme synthesis defect in TMEM14C-deficient cells was ameliorated with a protoporphyrin IX analog, indicating that TMEM14C primarily functions in the terminal steps of the heme synthesis pathway. Together, our data demonstrate that TMEM14C facilitates the import of protoporphyrinogen IX into the mitochondrial matrix for heme synthesis and subsequent hemoglobin production. Furthermore, the identification of TMEM14C as a protoporphyrinogen IX importer provides a genetic tool for further exploring erythropoiesis and congenital anemias.
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De Domenico I, Nemeth E, Nelson JM, Phillips JD, Ajioka RS, Kay MS, Kushner JP, Ganz T, Ward DM, Kaplan J. Retraction notice to: The hepcidin-binding site on ferroportin is evolutionarily conserved. Cell Metab 2014; 19:1067. [PMID: 25025111 PMCID: PMC4383248 DOI: 10.1016/j.cmet.2014.05.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Li L, Miao R, Jia X, Ward DM, Kaplan J. Expression of the yeast cation diffusion facilitators Mmt1 and Mmt2 affects mitochondrial and cellular iron homeostasis: evidence for mitochondrial iron export. J Biol Chem 2014; 289:17132-41. [PMID: 24798331 DOI: 10.1074/jbc.m114.574723] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Mmt1 and Mmt2 are highly homologous yeast members of the cation diffusion facilitator transporter family localized to mitochondria. Overexpression of MMT1/2 led to changes in cellular metal homeostasis (increased iron sensitivity, decreased cobalt sensitivity, increased sensitivity to copper), oxidant generation, and increased sensitivity to H2O2. The phenotypes due to overexpression of MMT1&2 were similar to that seen in cells with deletions in MRS3 and MRS4, genes that encode the mitochondrial iron importers. Overexpression of MMT1&2 resulted in induction of the low iron transcriptional response, similar to that seen in Δmrs3Δmr4 cells. This low iron transcriptional response was suppressed by deletion of CCC1, the gene that encodes the vacuolar iron importer. Measurement of the activity of the iron-dependent gentisate 1,2-dioxygenase from Pseudaminobacter salicylatoxidans expressed in yeast cytosol, showed that changes in Mmt1/2 levels affected cytosol iron concentration even in the absence of Ccc1. Overexpression of MMT1 resulted in increased cytosolic iron whereas deletion of MMT1/MMT2 led to decreased cytosolic iron. These results support the hypothesis that Mmt1/2 function as mitochondrial iron exporters.
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Affiliation(s)
- Liangtao Li
- From the Department of Pathology, School of Medicine, University of Utah, Salt Lake City, Utah 84132
| | - Ren Miao
- From the Department of Pathology, School of Medicine, University of Utah, Salt Lake City, Utah 84132
| | - Xuan Jia
- From the Department of Pathology, School of Medicine, University of Utah, Salt Lake City, Utah 84132
| | - Diane M Ward
- From the Department of Pathology, School of Medicine, University of Utah, Salt Lake City, Utah 84132
| | - Jerry Kaplan
- From the Department of Pathology, School of Medicine, University of Utah, Salt Lake City, Utah 84132
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Chung J, Anderson SA, Gwynn B, Deck KM, Chen MJ, Langer NB, Shaw GC, Huston NC, Boyer LF, Datta S, Paradkar PN, Li L, Wei Z, Lambert AJ, Sahr K, Wittig JG, Chen W, Lu W, Galy B, Schlaeger TM, Hentze MW, Ward DM, Kaplan J, Eisenstein RS, Peters LL, Paw BH. Iron regulatory protein-1 protects against mitoferrin-1-deficient porphyria. J Biol Chem 2014. [DOI: 10.1074/jbc.a114.547778] [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: 11/06/2022] Open
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45
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Kaplan J. Regulation of iron acquisition and storage in yeast (360.1). FASEB J 2014. [DOI: 10.1096/fasebj.28.1_supplement.360.1] [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] [Indexed: 11/11/2022]
Affiliation(s)
- Jerry Kaplan
- Dept of Pathology Univ. of Utah Sch. of Med.Salt Lake CityUTUnited States
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Abstract
The facile ability of iron to gain and lose electrons has made iron an important participant in a wide variety of biochemical reactions. Binding of ligands to iron modifies its redox potential, thereby permitting iron to transfer electrons with greater or lesser facility. The ability to transfer electrons, coupled with its abundance, as iron is the fourth most abundant mineral in the earth's crust, have contributed to iron being an element required by almost all species in the six kingdoms of life. Iron became an essential element for both Eubacteria and Archeabacteria in the early oxygen-free stages of the earth's evolution. With the advent of an oxygen-rich environment, the redox properties of iron made it extremely useful, as much of iron utilization in eukaryotes is focused on oxygen metabolism, either as an oxygen carrier or as an electron carrier that can facilitate oxygen-based chemistry.
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Affiliation(s)
- Jerry Kaplan
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84132, USA.
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Chung J, Anderson SA, Gwynn B, Deck KM, Chen MJ, Langer NB, Shaw GC, Huston NC, Boyer LF, Datta S, Paradkar PN, Li L, Wei Z, Lambert AJ, Sahr K, Wittig JG, Chen W, Lu W, Galy B, Schlaeger TM, Hentze MW, Ward DM, Kaplan J, Eisenstein RS, Peters LL, Paw BH. Iron regulatory protein-1 protects against mitoferrin-1-deficient porphyria. J Biol Chem 2014; 289:7835-43. [PMID: 24509859 DOI: 10.1074/jbc.m114.547778] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Mitochondrial iron is essential for the biosynthesis of heme and iron-sulfur ([Fe-S]) clusters in mammalian cells. In developing erythrocytes, iron is imported into the mitochondria by MFRN1 (mitoferrin-1, SLC25A37). Although loss of MFRN1 in zebrafish and mice leads to profound anemia, mutant animals showed no overt signs of porphyria, suggesting that mitochondrial iron deficiency does not result in an accumulation of protoporphyrins. Here, we developed a gene trap model to provide in vitro and in vivo evidence that iron regulatory protein-1 (IRP1) inhibits protoporphyrin accumulation. Mfrn1(+/gt);Irp1(-/-) erythroid cells exhibit a significant increase in protoporphyrin levels. IRP1 attenuates protoporphyrin biosynthesis by binding to the 5'-iron response element (IRE) of alas2 mRNA, inhibiting its translation. Ectopic expression of alas2 harboring a mutant IRE, preventing IRP1 binding, in Mfrn1(gt/gt) cells mimics Irp1 deficiency. Together, our data support a model whereby impaired mitochondrial [Fe-S] cluster biogenesis in Mfrn1(gt/gt) cells results in elevated IRP1 RNA-binding that attenuates ALAS2 mRNA translation and protoporphyrin accumulation.
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Affiliation(s)
- Jacky Chung
- From the Division of Hematology, Brigham and Women's Hospital; Division of Hematology-Oncology, Boston Children's Hospital and Harvard Medical School, Boston, Massachusetts 02115
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Ben-Othman R, Flannery AR, Miguel DC, Ward DM, Kaplan J, Andrews NW. Leishmania-mediated inhibition of iron export promotes parasite replication in macrophages. PLoS Pathog 2014; 10:e1003901. [PMID: 24497831 PMCID: PMC3907422 DOI: 10.1371/journal.ppat.1003901] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2013] [Accepted: 12/10/2013] [Indexed: 12/20/2022] Open
Abstract
Leishmania parasites infect macrophages, cells that play an important role in organismal iron homeostasis. By expressing ferroportin, a membrane protein specialized in iron export, macrophages release iron stored intracellularly into the circulation. Iron is essential for the intracellular replication of Leishmania, but how the parasites compete with the iron export function of their host cell is unknown. Here, we show that infection with Leishmania amazonensis inhibits ferroportin expression in macrophages. In a TLR4-dependent manner, infected macrophages upregulated transcription of hepcidin, a peptide hormone that triggers ferroportin degradation. Parasite replication was inhibited in hepcidin-deficient macrophages and in wild type macrophages overexpressing mutant ferroportin that is resistant to hepcidin-induced degradation. Conversely, intracellular growth was enhanced by exogenously added hepcidin, or by expression of dominant-negative ferroportin. Importantly, dominant-negative ferroportin and macrophages from flatiron mice, a mouse model for human type IV hereditary hemochromatosis, restored the infectivity of mutant parasite strains defective in iron acquisition. Thus, inhibition of ferroportin expression is a specific strategy used by L. amazonensis to inhibit iron export and promote their own intracellular growth.
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Affiliation(s)
- Rym Ben-Othman
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland, United States of America
| | - Andrew R. Flannery
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland, United States of America
| | - Danilo C. Miguel
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland, United States of America
| | - Diane M. Ward
- Department of Pathology, University of Utah, Salt Lake City, Utah, United States of America
| | - Jerry Kaplan
- Department of Pathology, University of Utah, Salt Lake City, Utah, United States of America
| | - Norma W. Andrews
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland, United States of America
- * E-mail:
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Patat O, van Ravenswaaij-Arts CMA, Tantau J, Corsten-Janssen N, van Tintelen JP, Dijkhuizen T, Kaplan J, Chassaing N. Otocephaly-Dysgnathia Complex: Description of Four Cases and Confirmation of the Role of OTX2. Mol Syndromol 2013; 4:302-5. [PMID: 24167467 DOI: 10.1159/000353727] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/22/2013] [Indexed: 11/19/2022] Open
Abstract
Otocephaly-dysgnathia complex is characterized by mandibular hypo- or aplasia, ear abnormalities, microstomia, and microglossia. Mutations in the orthodenticle homeobox 2 (OTX2) and paired related homeobox 1 (PRRX1) genes have recently been identified in some cases. We screened 4 otocephalic cases for these 2 genes and identified OTX2 mutations in 2 of them, thus confirming OTX2 is implicated in otocephaly. No PRRX1 mutation was identified. Interestingly, ocular involvement is not a constant feature in otocephalic cases with an OTX2 mutation. In one case, the mutation was inherited from a microphthalmic mother. The mechanism underlying this intrafamilial phenotypic variability remains unclear, but other genetic factors are likely to be necessary for the manifestation of the otocephalic phenotype.
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Affiliation(s)
- O Patat
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse, Paris, France
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