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Ihle R, Fridman B, Strollo S, Stephens B, Kemper S. EP01.02-006 Excuse Me? Patient Perceptions of Lung Cancer Screening Results. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.280] [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: 10/14/2022]
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2
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Ihle R, Fridman B, Strollo S, Stephens B, Kemper S. EP01.02-007 It’s Not How You Start, It’s How You Finish: Patient Motivators to Follow Low-Dose Screening Recommendations. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.281] [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: 10/14/2022]
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3
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Tarallo A, Damiano C, Strollo S, Minopoli N, Indrieri A, Polishchuk E, Zappa F, Nusco E, Fecarotta S, Porto C, Coletta M, Iacono R, Moracci M, Polishchuk R, Medina DL, Imbimbo P, Monti DM, De Matteis MA, Parenti G. Correction of oxidative stress enhances enzyme replacement therapy in Pompe disease. EMBO Mol Med 2021; 13:e14434. [PMID: 34606154 PMCID: PMC8573602 DOI: 10.15252/emmm.202114434] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 04/15/2021] [Revised: 09/15/2021] [Accepted: 09/20/2021] [Indexed: 02/06/2023] Open
Abstract
Pompe disease is a metabolic myopathy due to acid alpha-glucosidase deficiency. In addition to glycogen storage, secondary dysregulation of cellular functions, such as autophagy and oxidative stress, contributes to the disease pathophysiology. We have tested whether oxidative stress impacts on enzyme replacement therapy with recombinant human alpha-glucosidase (rhGAA), currently the standard of care for Pompe disease patients, and whether correction of oxidative stress may be beneficial for rhGAA therapy. We found elevated oxidative stress levels in tissues from the Pompe disease murine model and in patients' cells. In cells, stress levels inversely correlated with the ability of rhGAA to correct the enzymatic deficiency. Antioxidants (N-acetylcysteine, idebenone, resveratrol, edaravone) improved alpha-glucosidase activity in rhGAA-treated cells, enhanced enzyme processing, and improved mannose-6-phosphate receptor localization. When co-administered with rhGAA, antioxidants improved alpha-glucosidase activity in tissues from the Pompe disease mouse model. These results indicate that oxidative stress impacts on the efficacy of enzyme replacement therapy in Pompe disease and that manipulation of secondary abnormalities may represent a strategy to improve the efficacy of therapies for this disorder.
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Affiliation(s)
- Antonietta Tarallo
- Telethon Institute of Genetics and MedicinePozzuoliItaly
- Department of Translational Medical SciencesFederico II UniversityNaplesItaly
| | - Carla Damiano
- Telethon Institute of Genetics and MedicinePozzuoliItaly
- Department of Translational Medical SciencesFederico II UniversityNaplesItaly
| | - Sandra Strollo
- Telethon Institute of Genetics and MedicinePozzuoliItaly
| | - Nadia Minopoli
- Telethon Institute of Genetics and MedicinePozzuoliItaly
- Department of Translational Medical SciencesFederico II UniversityNaplesItaly
| | - Alessia Indrieri
- Telethon Institute of Genetics and MedicinePozzuoliItaly
- Institute for Genetic and Biomedical Research (IRGB)National Research Council (CNR)MilanItaly
| | | | - Francesca Zappa
- Telethon Institute of Genetics and MedicinePozzuoliItaly
- Present address:
Department of Molecular, Cellular, and Developmental BiologyUniversity of CaliforniaSanta BarbaraCAUSA
| | - Edoardo Nusco
- Telethon Institute of Genetics and MedicinePozzuoliItaly
| | - Simona Fecarotta
- Department of Translational Medical SciencesFederico II UniversityNaplesItaly
| | - Caterina Porto
- Department of Translational Medical SciencesFederico II UniversityNaplesItaly
| | - Marcella Coletta
- Department of Translational Medical SciencesFederico II UniversityNaplesItaly
- Present address:
IInd Division of NeurologyMultiple Sclerosis CenterUniversity of Campania "Luigi Vanvitelli"NaplesItaly
| | - Roberta Iacono
- Department of BiologyUniversity of Naples "Federico II", Complesso Universitario di Monte S. AngeloNaplesItaly
- Institute of Biosciences and BioResources ‐ National Research Council of ItalyNaplesItaly
| | - Marco Moracci
- Department of BiologyUniversity of Naples "Federico II", Complesso Universitario di Monte S. AngeloNaplesItaly
- Institute of Biosciences and BioResources ‐ National Research Council of ItalyNaplesItaly
| | | | - Diego Luis Medina
- Telethon Institute of Genetics and MedicinePozzuoliItaly
- Department of Translational Medical SciencesFederico II UniversityNaplesItaly
| | - Paola Imbimbo
- Department of Chemical SciencesFederico II UniversityNaplesItaly
| | | | - Maria Antonietta De Matteis
- Telethon Institute of Genetics and MedicinePozzuoliItaly
- Department of Molecular Medicine and Medical BiotechnologiesFederico II UniversityNaplesItaly
| | - Giancarlo Parenti
- Telethon Institute of Genetics and MedicinePozzuoliItaly
- Department of Translational Medical SciencesFederico II UniversityNaplesItaly
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4
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Iacono R, Minopoli N, Ferrara MC, Tarallo A, Damiano C, Porto C, Strollo S, Roig-Zamboni V, Peluso G, Sulzenbacher G, Cobucci-Ponzano B, Parenti G, Moracci M. Carnitine is a pharmacological allosteric chaperone of the human lysosomal α-glucosidase. J Enzyme Inhib Med Chem 2021; 36:2068-2079. [PMID: 34565280 PMCID: PMC8477953 DOI: 10.1080/14756366.2021.1975694] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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] [Indexed: 11/22/2022] Open
Abstract
Pompe disease is an inherited metabolic disorder due to the deficiency of the lysosomal acid α-glucosidase (GAA). The only approved treatment is enzyme replacement therapy with the recombinant enzyme (rhGAA). Further approaches like pharmacological chaperone therapy, based on the stabilising effect induced by small molecules on the target enzyme, could be a promising strategy. However, most known chaperones could be limited by their potential inhibitory effects on patient’s enzymes. Here we report on the discovery of novel chaperones for rhGAA, L- and D-carnitine, and the related compound acetyl-D-carnitine. These drugs stabilise the enzyme at pH and temperature without inhibiting the activity and acted synergistically with active-site directed pharmacological chaperones. Remarkably, they enhanced by 4-fold the acid α-glucosidase activity in fibroblasts from three Pompe patients with added rhGAA. This synergistic effect of L-carnitine and rhGAA has the potential to be translated into improved therapeutic efficacy of ERT in Pompe disease.
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Affiliation(s)
- Roberta Iacono
- Department of Biology, University of Naples "Federico II", Complesso Universitario di Monte S. Angelo, Naples, Italy.,Institute of Biosciences and Bioresources - CNR, Naples, Italy
| | - Nadia Minopoli
- Telethon Institute of Genetics & Medicine, Pozzuoli, Italy
| | | | | | - Carla Damiano
- Telethon Institute of Genetics & Medicine, Pozzuoli, Italy
| | - Caterina Porto
- Telethon Institute of Genetics & Medicine, Pozzuoli, Italy
| | - Sandra Strollo
- Telethon Institute of Genetics & Medicine, Pozzuoli, Italy
| | - Véronique Roig-Zamboni
- Centre National de la Recherche Scientifique (CNRS), Aix-Marseille University, AFMB, Marseille, France
| | - Gianfranco Peluso
- Research Institute on Terrestrial Ecosystems, UOS Naples-CNR, Naples, Italy
| | - Gerlind Sulzenbacher
- Centre National de la Recherche Scientifique (CNRS), Aix-Marseille University, AFMB, Marseille, France
| | | | - Giancarlo Parenti
- Telethon Institute of Genetics & Medicine, Pozzuoli, Italy.,Department of Translational Medical Sciences, Federico II University, Naples, Italy
| | - Marco Moracci
- Department of Biology, University of Naples "Federico II", Complesso Universitario di Monte S. Angelo, Naples, Italy.,Institute of Biosciences and Bioresources - CNR, Naples, Italy
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Sorrentino NC, Cacace V, De Risi M, Maffia V, Strollo S, Tedesco N, Nusco E, Romagnoli N, Ventrella D, Huang Y, Liu N, Kalled SL, Choi VW, De Leonibus E, Fraldi A. Enhancing the Therapeutic Potential of Sulfamidase for the Treatment of Mucopolysaccharidosis IIIA. Mol Ther Methods Clin Dev 2019; 15:333-342. [PMID: 31788497 PMCID: PMC6881609 DOI: 10.1016/j.omtm.2019.10.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 10/21/2019] [Indexed: 12/12/2022]
Abstract
Mucopolysaccharidosis type IIIA (MPS-IIIA) is a lysosomal storage disorder (LSD) caused by inherited defect of sulfamidase, a lysosomal sulfatase. MPS-IIIA is one of the most common and severe forms of LSDs with CNS involvement. Presently there is no cure. Here we have developed a new gene delivery approach for the treatment of MPS-IIIA based on the use of a modified version of sulfamidase expression cassette. This cassette encodes both a chimeric sulfamidase containing an alternative signal peptide (sp) to improve enzyme secretion and sulfatase-modifying factor 1 (SUMF1) to increase sulfamidase post-translational activation rate. We demonstrate that improved secretion and increased activation of sulfamidase act synergistically to enhance enzyme biodistribution in wild-type (WT) pigs upon intrathecal adeno-associated virus serotype 9 (AAV9)-mediated gene delivery. Translating such gene delivery strategy to a mouse model of MPS-IIIA results in a rescue of brain pathology, including memory deficit, as well as improvement in somatic tissues. These data may pave the way for developing effective gene delivery replacement protocols for the treatment of MPS-IIIA patients.
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Affiliation(s)
| | - Vincenzo Cacace
- Telethon Institute of Genetics and Medicine, Via Campi Flegrei 34, Pozzuoli, Naples, Italy
| | - Maria De Risi
- Telethon Institute of Genetics and Medicine, Via Campi Flegrei 34, Pozzuoli, Naples, Italy
| | - Veronica Maffia
- Telethon Institute of Genetics and Medicine, Via Campi Flegrei 34, Pozzuoli, Naples, Italy
| | - Sandra Strollo
- Telethon Institute of Genetics and Medicine, Via Campi Flegrei 34, Pozzuoli, Naples, Italy
| | - Novella Tedesco
- Telethon Institute of Genetics and Medicine, Via Campi Flegrei 34, Pozzuoli, Naples, Italy
| | - Edoardo Nusco
- Telethon Institute of Genetics and Medicine, Via Campi Flegrei 34, Pozzuoli, Naples, Italy
| | - Noemi Romagnoli
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra 50, Ozzano dell'Emilia, Bologna, Italy
| | - Domenico Ventrella
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra 50, Ozzano dell'Emilia, Bologna, Italy
| | - Yan Huang
- Takeda Pharmaceuticals, Cambridge, MA, USA
| | - Nan Liu
- Takeda Pharmaceuticals, Cambridge, MA, USA
| | | | | | - Elvira De Leonibus
- Telethon Institute of Genetics and Medicine, Via Campi Flegrei 34, Pozzuoli, Naples, Italy.,Institute of Cellular Biology and Neurobiology (IBCN), National Research Council (CNR), Via Ramarini 32, Monterotondo, Rome, Italy
| | - Alessandro Fraldi
- Telethon Institute of Genetics and Medicine, Via Campi Flegrei 34, Pozzuoli, Naples, Italy.,Department of Translational Medicine, University of Naples "Federico II," Naples, Italy
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Fleshner M, Olivier KN, Shaw PA, Adjemian J, Strollo S, Claypool RJ, Folio L, Zelazny A, Holland SM, Prevots DR. Mortality among patients with pulmonary non-tuberculous mycobacteria disease. Int J Tuberc Lung Dis 2017; 20:582-7. [PMID: 27084809 DOI: 10.5588/ijtld.15.0807] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
SETTING Tertiary referral center, National Institutes of Health (NIH), USA. OBJECTIVE To estimate the mortality rate and its correlates among persons with pulmonary non-tuberculous mycobacteria (PNTM) disease. DESIGN A retrospective review of 106 patients who were treated at the NIH Clinical Center and met American Thoracic Society/Infectious Diseases Society of America criteria for PNTM. Eligible patients were aged ⩾18 years and did not have cystic fibrosis or human immunodeficiency virus (HIV) infection. RESULTS Of 106 patients followed for a median of 4.9 years, 27 (25%) died during follow-up, for a mortality rate of 4.2 per 100 person-years. The population was predominantly female (88%) and White (88%), with infrequent comorbidities. Fibrocavitary disease (adjusted hazard ratio [aHR] 3.3, 95% confidence interval [CI] 1.3-8.3) and pulmonary hypertension (aHR 2.1, 95%CI 0.9-5.1) were associated with a significantly elevated risk of mortality in survival analysis. CONCLUSIONS PNTM remains a serious public health concern, with a consistently elevated mortality rate across multiple populations. Significant risk factors for death include fibrocavitary disease and pulmonary hypertension. Further research is needed to more specifically identify clinical and microbiologic factors that jointly influence disease outcome.
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Affiliation(s)
- M Fleshner
- Epidemiology Unit, Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health (NIH), Bethesda, Maryland, USA
| | - K N Olivier
- Cardiovascular and Pulmonary Branch, National Heart, Lung and Blood Institute, NIH, Bethesda, Maryland, USA
| | - P A Shaw
- Biostatistics Research Branch, Division of Clinical Research, Department of Biostatistics and Epidemiology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - J Adjemian
- Epidemiology Unit, Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health (NIH), Bethesda, USA
| | - S Strollo
- Epidemiology Unit, Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health (NIH), Bethesda, USA
| | - R J Claypool
- Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health (NIH), Bethesda, USA
| | - L Folio
- Department of Radiology and Imaging Sciences, Clinical Center, NIH, Bethesda, USA
| | - A Zelazny
- Department of Laboratory Medicine, Clinical Center, NIH, Bethesda, Maryland, USA
| | - S M Holland
- Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health (NIH), Bethesda, USA
| | - D R Prevots
- Epidemiology Unit, Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health (NIH), Bethesda, USA
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7
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Fernandez Vallone V, Leprovots M, Strollo S, Vasile G, Lefort A, Libert F, Vassart G, Garcia MI. Trop2 marks transient gastric fetal epithelium and adult regenerating cells after epithelial damage. Development 2016; 143:1452-63. [PMID: 26989172 PMCID: PMC4986166 DOI: 10.1242/dev.131490] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 03/04/2016] [Indexed: 01/10/2023]
Abstract
Mouse fetal intestinal progenitors lining the epithelium prior to villogenesis grow as spheroids when cultured ex vivo and express the transmembrane glycoprotein Trop2 as a marker. Here, we report the characterization of Trop2-expressing cells from fetal pre-glandular stomach, growing as immortal undifferentiated spheroids, and their relationship with gastric development and regeneration. Trop2+ cells generating gastric spheroids differed from adult glandular Lgr5+ stem cells, but appeared highly related to fetal intestinal spheroids. Although they shared a common spheroid signature, intestinal and gastric fetal spheroid-generating cells expressed organ-specific transcription factors and were committed to intestinal and glandular gastric differentiation, respectively. Trop2 expression was transient during glandular stomach development, being lost at the onset of gland formation, whereas it persisted in the squamous forestomach. Undetectable under homeostasis, Trop2 was strongly re-expressed in glands after acute Lgr5+ stem cell ablation or following indomethacin-induced injury. These highly proliferative reactive adult Trop2+ cells exhibited a transcriptome displaying similarity with that of gastric embryonic Trop2+ cells, suggesting that epithelium regeneration in adult stomach glands involves the partial re-expression of a fetal genetic program. Summary: Trop2, a marker of gastric fetal glandular epithelium grown ex vivo, is re-expressed upon injury in adult regenerative cells together with a partial fetal-like genetic program.
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Affiliation(s)
- Valeria Fernandez Vallone
- Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire (IRIBHM), Faculty of Medicine, Université Libre de Bruxelles ULB, Route de Lennik 808, Brussels 1070, Belgium
| | - Morgane Leprovots
- Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire (IRIBHM), Faculty of Medicine, Université Libre de Bruxelles ULB, Route de Lennik 808, Brussels 1070, Belgium
| | - Sandra Strollo
- Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire (IRIBHM), Faculty of Medicine, Université Libre de Bruxelles ULB, Route de Lennik 808, Brussels 1070, Belgium
| | - Gabriela Vasile
- Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire (IRIBHM), Faculty of Medicine, Université Libre de Bruxelles ULB, Route de Lennik 808, Brussels 1070, Belgium
| | - Anne Lefort
- Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire (IRIBHM), Faculty of Medicine, Université Libre de Bruxelles ULB, Route de Lennik 808, Brussels 1070, Belgium
| | - Frederick Libert
- Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire (IRIBHM), Faculty of Medicine, Université Libre de Bruxelles ULB, Route de Lennik 808, Brussels 1070, Belgium
| | - Gilbert Vassart
- Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire (IRIBHM), Faculty of Medicine, Université Libre de Bruxelles ULB, Route de Lennik 808, Brussels 1070, Belgium
| | - Marie-Isabelle Garcia
- Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire (IRIBHM), Faculty of Medicine, Université Libre de Bruxelles ULB, Route de Lennik 808, Brussels 1070, Belgium
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8
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Sorrentino NC, Maffia V, Strollo S, Cacace V, Romagnoli N, Manfredi A, Ventrella D, Dondi F, Barone F, Giunti M, Graham AR, Huang Y, Kalled SL, Auricchio A, Bacci ML, Surace EM, Fraldi A. A Comprehensive Map of CNS Transduction by Eight Recombinant Adeno-associated Virus Serotypes Upon Cerebrospinal Fluid Administration in Pigs. Mol Ther 2015; 24:276-286. [PMID: 26639405 DOI: 10.1038/mt.2015.212] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Accepted: 11/22/2015] [Indexed: 12/16/2022] Open
Abstract
Cerebrospinal fluid administration of recombinant adeno-associated viral (rAAV) vectors has been demonstrated to be effective in delivering therapeutic genes to the central nervous system (CNS) in different disease animal models. However, a quantitative and qualitative analysis of transduction patterns of the most promising rAAV serotypes for brain targeting in large animal models is missing. Here, we characterize distribution, transduction efficiency, and cellular targeting of rAAV serotypes 1, 2, 5, 7, 9, rh.10, rh.39, and rh.43 delivered into the cisterna magna of wild-type pigs. rAAV9 showed the highest transduction efficiency and the widest distribution capability among the vectors tested. Moreover, rAAV9 robustly transduced both glia and neurons, including the motor neurons of the spinal cord. Relevant cell transduction specificity of the glia was observed after rAAV1 and rAAV7 delivery. rAAV7 also displayed a specific tropism to Purkinje cells. Evaluation of biochemical and hematological markers suggested that all rAAV serotypes tested were well tolerated. This study provides a comprehensive CNS transduction map in a useful preclinical large animal model enabling the selection of potentially clinically transferable rAAV serotypes based on disease specificity. Therefore, our data are instrumental for the clinical evaluation of these rAAV vectors in human neurodegenerative diseases.
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Affiliation(s)
| | - Veronica Maffia
- Telethon Institute of Genetics and Medicine (TIGEM), Naples, Italy
| | - Sandra Strollo
- Telethon Institute of Genetics and Medicine (TIGEM), Naples, Italy
| | - Vincenzo Cacace
- Telethon Institute of Genetics and Medicine (TIGEM), Naples, Italy
| | - Noemi Romagnoli
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, Bologna, Italy
| | - Anna Manfredi
- Telethon Institute of Genetics and Medicine (TIGEM), Naples, Italy
| | - Domenico Ventrella
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, Bologna, Italy
| | - Francesco Dondi
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, Bologna, Italy
| | - Francesca Barone
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, Bologna, Italy
| | - Massimo Giunti
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, Bologna, Italy
| | - Anne-Renee Graham
- Shire, Discovery Biology and Translational Research, Lexington, Massachusetts, USA
| | - Yan Huang
- Shire, Discovery Biology and Translational Research, Lexington, Massachusetts, USA
| | - Susan L Kalled
- Shire, Discovery Biology and Translational Research, Lexington, Massachusetts, USA
| | - Alberto Auricchio
- Telethon Institute of Genetics and Medicine (TIGEM), Naples, Italy; Medical Genetics, Department of Translational Medicine, "FEDERICO II" University, Naples, Italy
| | - Maria Laura Bacci
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, Bologna, Italy
| | - Enrico Maria Surace
- Telethon Institute of Genetics and Medicine (TIGEM), Naples, Italy; Medical Genetics, Department of Translational Medicine, "FEDERICO II" University, Naples, Italy.
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9
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Mustata RC, Van Loy T, Lefort A, Libert F, Strollo S, Vassart G, Garcia MI. Lgr4 is required for Paneth cell differentiation and maintenance of intestinal stem cells ex vivo. EMBO Rep 2011; 12:558-64. [PMID: 21508962 DOI: 10.1038/embor.2011.52] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2010] [Revised: 03/11/2011] [Accepted: 03/11/2011] [Indexed: 12/27/2022] Open
Abstract
Gene inactivation of the orphan G protein-coupled receptor LGR4, a paralogue of the epithelial-stem-cell marker LGR5, results in a 50% decrease in epithelial cell proliferation and an 80% reduction in terminal differentiation of Paneth cells in postnatal mouse intestinal crypts. When cultured ex vivo, LGR4-deficient crypts or progenitors, but not LGR5-deficient progenitors, die rapidly with marked downregulation of stem-cell markers and Wnt target genes, including Lgr5. Partial rescue of this phenotype is achieved by addition of LiCl to the culture medium, but not Wnt agonists. Our results identify LGR4 as a permissive factor in the Wnt pathway in the intestine and, as such, as a potential target for intestinal cancer therapy.
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Affiliation(s)
- Roxana C Mustata
- Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire, Faculty of Medicine, Université Libre de Bruxelles, Route de Lennik 808, Brussels 1070, Belgium
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10
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Cunha BA, Syed U, Strollo S. Non-specific laboratory test indicators of severity in hospitalized adults with swine influenza (H1N1) pneumonia. Eur J Clin Microbiol Infect Dis 2010; 29:1583-8. [DOI: 10.1007/s10096-010-1069-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2009] [Accepted: 09/19/2010] [Indexed: 11/28/2022]
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11
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Cunha B, Syed U, Strollo S. During the "herald wave" of the pandemic bacterial pneumonia relatively rare with fatal swine influenza (H1N1) pneumonia: if chest films have no focal segmental/lobar infiltrates, antibiotic therapy is unnecessary. J Chemother 2010; 21:584-9. [PMID: 19933051 DOI: 10.1179/joc.2009.21.5.584] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Affiliation(s)
- B Cunha
- Infectious Disease Division, Winthrop-University Hospital, Mineola, New York 11501, USA
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12
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Garcia MI, Ghiani M, Lefort A, Libert F, Strollo S, Vassart G. LGR5 deficiency deregulates Wnt signaling and leads to precocious Paneth cell differentiation in the fetal intestine. Dev Biol 2009; 331:58-67. [PMID: 19394326 DOI: 10.1016/j.ydbio.2009.04.020] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2009] [Revised: 04/16/2009] [Accepted: 04/20/2009] [Indexed: 12/17/2022]
Abstract
The orphan Leucine-rich repeat G protein-coupled receptor 5 (LGR5/GPR49), a target of Wnt signaling, is a marker of adult intestinal stem cells (SC). However, neither its function in the adults, nor during development of the intestine have been addressed yet. In this report, we investigated the role of LGR5 during ileal development by using LGR5 null/LacZ-NeoR knock-in mice. X-gal staining experiments showed that, after villus morphogenesis, Lgr5 expression becomes restricted to dividing cells clustered in the intervillus region and is more pronounced in the distal small intestine. At day E18.5, LGR5 deficiency leads to premature Paneth cell differentiation in the small intestine without detectable effects on differentiation of other cell lineages, nor on epithelial cell proliferation or migration. Quantitative RT-PCR experiments showed that expression from the LGR5 promoter was upregulated in LGR5-null mice, pointing to the existence of an autoregulatory negative feedback loop in intact animals. This deregulation was associated with overexpression of Wnt target genes in the intervillus epithelium. Transcriptional profiling of mutant mice ileums revealed that LGR5 function is associated with expression of SC and SC niche markers. Together, our data identify LGR5 as a negative regulator of the Wnt pathway in the developing intestine.
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Affiliation(s)
- Marie Isabelle Garcia
- Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire (IRIBHM), Faculty of Medicine, Université Libre de Bruxelles, 1070 Brussels, Belgium
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