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Brendel C, Negre O, Rothe M, Guda S, Parsons G, Harris C, McGuinness M, Abriss D, Tsytsykova A, Klatt D, Bentler M, Pellin D, Christiansen L, Schambach A, Manis J, Trebeden-Negre H, Bonner M, Esrick E, Veres G, Armant M, Williams DA. Preclinical Evaluation of a Novel Lentiviral Vector Driving Lineage-Specific BCL11A Knockdown for Sickle Cell Gene Therapy. Mol Ther Methods Clin Dev 2020; 17:589-600. [PMID: 32300607 PMCID: PMC7150438 DOI: 10.1016/j.omtm.2020.03.015] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 03/12/2020] [Indexed: 01/09/2023]
Abstract
In this work we provide preclinical data to support initiation of a first-in-human trial for sickle cell disease (SCD) using an approach that relies on reversal of the developmental fetal-to-adult hemoglobin switch. Erythroid-specific knockdown of BCL11A via a lentiviral-encoded microRNA-adapted short hairpin RNA (shRNAmiR) leads to reactivation of the gamma-globin gene while simultaneously reducing expression of the pathogenic adult sickle β-globin. We generated a refined lentiviral vector (LVV) BCH-BB694 that was developed to overcome poor vector titers observed in the manufacturing scale-up of the original research-grade LVV. Healthy or sickle cell donor CD34+ cells transduced with Good Manufacturing Practices (GMP)-grade BCH-BB694 LVV achieved high vector copy numbers (VCNs) >5 and gene marking of >80%, resulting in a 3- to 5-fold induction of fetal hemoglobin (HbF) compared with mock-transduced cells without affecting growth, differentiation, and engraftment of gene-modified cells in vitro or in vivo. In vitro immortalization assays, which are designed to measure vector-mediated genotoxicity, showed no increased immortalization compared with mock-transduced cells. Together these data demonstrate that BCH-BB694 LVV is non-toxic and efficacious in preclinical studies, and can be generated at a clinically relevant scale in a GMP setting at high titer to support clinical testing for the treatment of SCD.
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Affiliation(s)
- Christian Brendel
- Division of Hematology/Oncology, Boston Children’s Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
- Harvard Stem Cell Institute, Cambridge, MA, USA
| | | | - Michael Rothe
- Institute of Experimental Hematology, Hannover Medical School, Hannover, Germany
| | - Swaroopa Guda
- Division of Hematology/Oncology, Boston Children’s Hospital, Boston, MA, USA
| | | | - Chad Harris
- Division of Hematology/Oncology, Boston Children’s Hospital, Boston, MA, USA
| | - Meaghan McGuinness
- Division of Hematology/Oncology, Boston Children’s Hospital, Boston, MA, USA
| | - Daniela Abriss
- Division of Hematology/Oncology, Boston Children’s Hospital, Boston, MA, USA
| | - Alla Tsytsykova
- Division of Hematology/Oncology, Boston Children’s Hospital, Boston, MA, USA
| | - Denise Klatt
- Division of Hematology/Oncology, Boston Children’s Hospital, Boston, MA, USA
- Institute of Experimental Hematology, Hannover Medical School, Hannover, Germany
| | - Martin Bentler
- Division of Hematology/Oncology, Boston Children’s Hospital, Boston, MA, USA
- Institute of Experimental Hematology, Hannover Medical School, Hannover, Germany
| | - Danilo Pellin
- Division of Hematology/Oncology, Boston Children’s Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | | | - Axel Schambach
- Institute of Experimental Hematology, Hannover Medical School, Hannover, Germany
| | - John Manis
- Department of Laboratory Medicine, Boston Children’s Hospital, Boston, MA, USA
| | - Helene Trebeden-Negre
- Connell & O’Reilly Families Cell Manipulation Core Facility, Dana-Farber Cancer Institute, Boston, MA, USA
| | | | - Erica Esrick
- Division of Hematology/Oncology, Boston Children’s Hospital, Boston, MA, USA
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | | | - Myriam Armant
- Division of Hematology/Oncology, Boston Children’s Hospital, Boston, MA, USA
| | - David A. Williams
- Division of Hematology/Oncology, Boston Children’s Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
- Harvard Stem Cell Institute, Cambridge, MA, USA
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2
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Fischer J, Schlaghaufer F, Lottner EM, Slenczka A, Christiansen L, Stapelfeldt H, Karra M, Friedrich B, Mullan T, Schütz M, Usvyat D. Heterogeneous Clusters of Phthalocyanine and Water Prepared and Probed in Superfluid Helium Nanodroplets. J Phys Chem A 2019; 123:10057-10064. [PMID: 31670512 DOI: 10.1021/acs.jpca.9b07302] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Superfluid helium nanodroplets comprised of thousands to millions of helium atoms can serve as a reactor for the synthesis of heterogeneous molecular clusters at cryogenic conditions. The cluster synthesis occurs via consecutive pick-up of the cluster building blocks by the helium droplet and their subsequent coalescence within the droplet. The effective collision cross section of the building blocks is determined by the helium droplet size and thus exceeds by orders of magnitude that of a reactive collision in the gas phase. Moreover, the cryogenic helium environment (at 0.38 K) as a host promotes the formation of metastable cluster configurations. The question arises as to the extent of the actual involvement of the helium environment in the cluster formation. The present study deals with clusters of single phthalocyanine (Pc) molecules with single water molecules. A large fluorophore such as Pc offers several sites where the water molecule can attach. The resulting isomeric variants of the Pc-H2O complex can be selectively identified by electronic spectroscopy. We compare the experimental electronic spectra of the Pc-H2O complex generated in superfluid helium nanodroplets with the results of quantum-chemical calculations on the same cluster but under gas-phase conditions. The number of isomeric variants observed in the helium droplet experiment comes out the same as that obtained from our gas-phase calculations.
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Affiliation(s)
- J Fischer
- Institut für Physikalische und Theoretische Chemie , Universität Regensburg , 93053 Regensburg , Germany
| | - F Schlaghaufer
- Institut für Physikalische und Theoretische Chemie , Universität Regensburg , 93053 Regensburg , Germany
| | - E-M Lottner
- Institut für Physikalische und Theoretische Chemie , Universität Regensburg , 93053 Regensburg , Germany
| | - A Slenczka
- Institut für Physikalische und Theoretische Chemie , Universität Regensburg , 93053 Regensburg , Germany
| | - L Christiansen
- Department of Chemistry , Aarhus University , Langelandsgade 140 , 8000 Aarhus C , Denmark
| | - H Stapelfeldt
- Department of Chemistry , Aarhus University , Langelandsgade 140 , 8000 Aarhus C , Denmark
| | - M Karra
- Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , 14195 Berlin , Germany
| | - B Friedrich
- Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , 14195 Berlin , Germany
| | - Th Mullan
- Institut für Chemie , Humboldt-Universität zu Berlin , Unter den Linden 6 , 10099 Berlin , Germany
| | - M Schütz
- Institut für Chemie , Humboldt-Universität zu Berlin , Unter den Linden 6 , 10099 Berlin , Germany
| | - D Usvyat
- Institut für Chemie , Humboldt-Universität zu Berlin , Unter den Linden 6 , 10099 Berlin , Germany
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3
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Lewis G, Christiansen L, McKenzie J, Luo M, Pasackow E, Smurnyy Y, Harrington S, Gregory P, Veres G, Negre O, Bonner M. Staurosporine Increases Lentiviral Vector Transduction Efficiency of Human Hematopoietic Stem and Progenitor Cells. Mol Ther Methods Clin Dev 2018; 9:313-322. [PMID: 30038935 PMCID: PMC6054695 DOI: 10.1016/j.omtm.2018.04.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Accepted: 04/01/2018] [Indexed: 11/19/2022]
Abstract
Lentiviral vector (LVV)-mediated transduction of human CD34+ hematopoietic stem and progenitor cells (HSPCs) holds tremendous promise for the treatment of monogenic hematological diseases. This approach requires the generation of a sufficient proportion of gene-modified cells. We identified staurosporine, a serine/threonine kinase inhibitor, as a small molecule that could be added to the transduction process to increase the proportion of genetically modified HSPCs by overcoming a LVV entry barrier. Staurosporine increased vector copy number (VCN) approximately 2-fold when added to mobilized peripheral blood (mPB) CD34+ cells prior to transduction. Limited staurosporine treatment did not affect viability of cells post-transduction, and there was no difference in in vitro colony formation compared to vehicle-treated cells. Xenotransplantation studies identified a statistically significant increase in VCN in engrafted human cells in mouse bone marrow at 4 months post-transplantation compared to vehicle-treated cells. Prostaglandin E2 (PGE2) is known to increase transduction efficiency of HSPCs through a different mechanism. Combining staurosporine and PGE2 resulted in further enhancement of transduction efficiency, particularly in short-term HSPCs. The combinatorial use of small molecules, such as staurosporine and PGE2, to enhance LVV transduction of human CD34+ cells is a promising method to improve transduction efficiency and subsequent potential therapeutic benefit of gene therapy drug products.
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Affiliation(s)
- Gretchen Lewis
- bluebird bio, Inc., 60 Binney St., Cambridge, MA 02142, USA
| | | | | | - Min Luo
- bluebird bio, Inc., 60 Binney St., Cambridge, MA 02142, USA
| | - Eli Pasackow
- bluebird bio, Inc., 60 Binney St., Cambridge, MA 02142, USA
| | - Yegor Smurnyy
- bluebird bio, Inc., 60 Binney St., Cambridge, MA 02142, USA
| | | | - Philip Gregory
- bluebird bio, Inc., 60 Binney St., Cambridge, MA 02142, USA
| | - Gabor Veres
- bluebird bio, Inc., 60 Binney St., Cambridge, MA 02142, USA
| | - Olivier Negre
- bluebird bio, Inc., 60 Binney St., Cambridge, MA 02142, USA
| | - Melissa Bonner
- bluebird bio, Inc., 60 Binney St., Cambridge, MA 02142, USA
- Corresponding author: Melissa Bonner, bluebird bio, Inc., 60 Binney St., Cambridge, MA 02142, USA.
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4
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Kurtzer I, Bouyer LJ, Bouffard J, Jin A, Christiansen L, Nielsen JB, Scott SH. Variable impact of tizanidine on the medium latency reflex of upper and lower limbs. Exp Brain Res 2018; 236:665-677. [PMID: 29299640 DOI: 10.1007/s00221-017-5162-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 08/29/2017] [Accepted: 12/22/2017] [Indexed: 01/05/2023]
Abstract
Sudden limb displacement evokes a complex sequence of compensatory muscle activity. Following the short-latency reflex and preceding voluntary reactions is an epoch termed the medium-latency reflex (MLR) that could reflect spinal processing of group II muscle afferents. One way to test this possibility is oral ingestion of tizanidine, an alpha-2 adrenergic agonist that inhibits the interneurons transmitting group II signals onto spinal motor neurons. We examined whether group II afferents contribute to MLR activity throughout the major muscles that span the elbow and shoulder. MLRs of ankle muscles were also tested during walking on the same day, in the same participants as well as during sitting in a different group of subjects. In contrast to previous reports, the ingestion of tizanidine had minimal impact on MLRs of arm or leg muscles during motor actions. A significant decrease in magnitude was observed for 2/16 contrasts in arm muscles and 0/4 contrasts in leg muscles. This discrepancy with previous studies could indicate that tizanidine's efficacy is altered by subtle changes in protocol or that group II afferents do not substantially contribute to MLRs.
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Affiliation(s)
- Isaac Kurtzer
- Department of Biomedical Science, New York Institute of Technology-College of Osteopathic Medicine, Old Westbury, USA.
| | | | - J Bouffard
- Department of Rehabilitation, Université Laval, Quebec, Canada
| | - A Jin
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Canada.,Department of Medicine, Queen's University, Kingston, Canada
| | - L Christiansen
- Department of Neuroscience and Pharmacology, University of Copenhagen, Copenhagen, Denmark
| | - J B Nielsen
- Department of Neuroscience and Pharmacology, University of Copenhagen, Copenhagen, Denmark
| | - S H Scott
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Canada.,Department of Medicine, Queen's University, Kingston, Canada
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5
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Heffner GC, Bonner M, Christiansen L, Pierciey FJ, Campbell D, Smurnyy Y, Zhang W, Hamel A, Shaw S, Lewis G, Goss KA, Garijo O, Torbett BE, Horton H, Finer MH, Gregory PD, Veres G. Prostaglandin E 2 Increases Lentiviral Vector Transduction Efficiency of Adult Human Hematopoietic Stem and Progenitor Cells. Mol Ther 2017; 26:320-328. [PMID: 29102562 PMCID: PMC5763075 DOI: 10.1016/j.ymthe.2017.09.025] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [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: 11/22/2016] [Revised: 09/22/2017] [Accepted: 09/29/2017] [Indexed: 12/15/2022] Open
Abstract
Gene therapy currently in development for hemoglobinopathies utilizes ex vivo lentiviral transduction of CD34+ hematopoietic stem and progenitor cells (HSPCs). A small-molecule screen identified prostaglandin E2 (PGE2) as a positive mediator of lentiviral transduction of CD34+ cells. Supplementation with PGE2 increased lentiviral vector (LVV) transduction of CD34+ cells approximately 2-fold compared to control transduction methods with no effect on cell viability. Transduction efficiency was consistently increased in primary CD34+ cells from multiple normal human donors and from patients with β-thalassemia or sickle cell disease. Notably, PGE2 increased transduction of repopulating human HSPCs in an immune-deficient (nonobese diabetic/severe combined immunodeficiency/interleukin-2 gamma receptor null [NSG]) xenotransplantation mouse model without evidence of in vivo toxicity, lineage bias, or a de novo bias of lentiviral integration sites. These data suggest that PGE2 improves lentiviral transduction and increases vector copy number, therefore resulting in increased transgene expression. As a result, PGE2 may be useful in clinical gene therapy applications using lentivirally modified HSPCs.
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Affiliation(s)
| | - Melissa Bonner
- bluebird bio, Inc., 60 Binney Street, Cambridge, MA 02142, USA
| | | | | | - Dakota Campbell
- bluebird bio, Inc., 60 Binney Street, Cambridge, MA 02142, USA
| | - Yegor Smurnyy
- bluebird bio, Inc., 60 Binney Street, Cambridge, MA 02142, USA
| | - Wenliang Zhang
- bluebird bio, Inc., 60 Binney Street, Cambridge, MA 02142, USA
| | - Amanda Hamel
- bluebird bio, Inc., 60 Binney Street, Cambridge, MA 02142, USA
| | - Seema Shaw
- bluebird bio, Inc., 60 Binney Street, Cambridge, MA 02142, USA
| | - Gretchen Lewis
- bluebird bio, Inc., 60 Binney Street, Cambridge, MA 02142, USA
| | - Kendrick A Goss
- bluebird bio, Inc., 60 Binney Street, Cambridge, MA 02142, USA
| | - Olivia Garijo
- Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Bruce E Torbett
- Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Holly Horton
- bluebird bio, Inc., 60 Binney Street, Cambridge, MA 02142, USA
| | | | | | - Gabor Veres
- bluebird bio, Inc., 60 Binney Street, Cambridge, MA 02142, USA
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6
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Starnawska A, Tan Q, Lenart A, McGue M, Mors O, Børglum AD, Christensen K, Nyegaard M, Christiansen L. Blood DNA methylation age is not associated with cognitive functioning in middle-aged monozygotic twins. Neurobiol Aging 2016; 50:60-63. [PMID: 27889677 DOI: 10.1016/j.neurobiolaging.2016.10.025] [Citation(s) in RCA: 26] [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: 02/08/2016] [Revised: 09/23/2016] [Accepted: 10/25/2016] [Indexed: 10/20/2022]
Abstract
The epigenetic clock, also known as DNA methylation age (DNAmAge), represents age-related changes of DNA methylation at multiple sites of the genome and is suggested to be a biomarker for biological age. Elevated blood DNAmAge is associated with all-cause mortality, with the strongest effects reported in a recent intrapair twin study where epigenetically older twins had increased mortality risk in comparison to their co-twins. In the study presented here, we hypothesize that DNAmAge in blood is associated with cross-sectional and longitudinal cognitive abilities in middle-aged individuals. In 486 monozygotic twins, we investigated the association of DNAmAge, difference between DNAmAge and chronological age and age acceleration with cognition. Despite using a powerful paired twin design, we found no evidence for association of blood DNAmAge with cognitive abilities. This observation was confirmed in unpaired analyses, where DNAmAge initially correlated with cognitive abilities, until adjusting for chronological age. Overall, our study shows that for middle-aged individuals DNAmAge calculated in blood does not correlate with cognitive abilities.
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Affiliation(s)
- A Starnawska
- Department of Biomedicine, Aarhus University, Aarhus, Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research, iPSYCH, Aarhus, Denmark; Center for Integrative Sequencing, iSEQ, Aarhus University, Aarhus, Denmark.
| | - Q Tan
- The Danish Aging Research Center, and The Danish Twin Registry, Institute of Public Health, University of Southern Denmark, Odense, Denmark; Department of Clinical Genetics, Odense University Hospital, Odense, Denmark
| | - A Lenart
- Max Planck Odense Center on the Biodemography of Aging, Institute of Public Health, University of Southern Denmark, Odense, Denmark
| | - M McGue
- The Danish Aging Research Center, and The Danish Twin Registry, Institute of Public Health, University of Southern Denmark, Odense, Denmark; Department of Psychology, University of Minnesota, Minneapolis, MN, USA
| | - O Mors
- The Lundbeck Foundation Initiative for Integrative Psychiatric Research, iPSYCH, Aarhus, Denmark; Psychosis Research Unit, Aarhus University Hospital, Risskov, Denmark
| | - A D Børglum
- Department of Biomedicine, Aarhus University, Aarhus, Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research, iPSYCH, Aarhus, Denmark; Center for Integrative Sequencing, iSEQ, Aarhus University, Aarhus, Denmark
| | - K Christensen
- The Danish Aging Research Center, and The Danish Twin Registry, Institute of Public Health, University of Southern Denmark, Odense, Denmark; Department of Clinical Genetics, Odense University Hospital, Odense, Denmark; Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Odense, Denmark
| | - M Nyegaard
- Department of Biomedicine, Aarhus University, Aarhus, Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research, iPSYCH, Aarhus, Denmark; Center for Integrative Sequencing, iSEQ, Aarhus University, Aarhus, Denmark
| | - L Christiansen
- The Danish Aging Research Center, and The Danish Twin Registry, Institute of Public Health, University of Southern Denmark, Odense, Denmark
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7
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Thomas R, Flindtgaard M, Skriver K, Geertsen SS, Christiansen L, Korsgaard Johnsen L, Busk DVP, Bojsen-Møller E, Madsen MJ, Ritz C, Roig M, Lundbye-Jensen J. Acute exercise and motor memory consolidation: Does exercise type play a role? Scand J Med Sci Sports 2016; 27:1523-1532. [DOI: 10.1111/sms.12791] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/30/2016] [Indexed: 11/28/2022]
Affiliation(s)
- R. Thomas
- Department of Nutrition, Exercise and Sports; Centre for Team Sport & Health; University of Copenhagen; Kobenhavn Denmark
- Department of Neuroscience & Pharmacology; University of Copenhagen; Kobenhavn Denmark
| | - M. Flindtgaard
- Department of Nutrition, Exercise and Sports; Centre for Team Sport & Health; University of Copenhagen; Kobenhavn Denmark
| | - K. Skriver
- Department of Nutrition, Exercise and Sports; Centre for Team Sport & Health; University of Copenhagen; Kobenhavn Denmark
- Department of Neuroscience & Pharmacology; University of Copenhagen; Kobenhavn Denmark
| | - S. S. Geertsen
- Department of Nutrition, Exercise and Sports; Centre for Team Sport & Health; University of Copenhagen; Kobenhavn Denmark
- Department of Neuroscience & Pharmacology; University of Copenhagen; Kobenhavn Denmark
| | - L. Christiansen
- Department of Nutrition, Exercise and Sports; Centre for Team Sport & Health; University of Copenhagen; Kobenhavn Denmark
- Department of Neuroscience & Pharmacology; University of Copenhagen; Kobenhavn Denmark
- Department of Neurological Surgery; The Miami Project to Cure Paralysis; University of Miami; Miami Florida USA
| | - L. Korsgaard Johnsen
- Department of Nutrition, Exercise and Sports; Centre for Team Sport & Health; University of Copenhagen; Kobenhavn Denmark
- Department of Neuroscience & Pharmacology; University of Copenhagen; Kobenhavn Denmark
| | - D. V. P. Busk
- Department of Nutrition, Exercise and Sports; Centre for Team Sport & Health; University of Copenhagen; Kobenhavn Denmark
- Department of Neuroscience & Pharmacology; University of Copenhagen; Kobenhavn Denmark
| | - E. Bojsen-Møller
- Department of Nutrition, Exercise and Sports; Centre for Team Sport & Health; University of Copenhagen; Kobenhavn Denmark
- Department of Neuroscience & Pharmacology; University of Copenhagen; Kobenhavn Denmark
| | - M. J. Madsen
- Department of Nutrition, Exercise and Sports; Centre for Team Sport & Health; University of Copenhagen; Kobenhavn Denmark
- Department of Neuroscience & Pharmacology; University of Copenhagen; Kobenhavn Denmark
| | - C. Ritz
- Department of Nutrition, Exercise and Sports; Centre for Team Sport & Health; University of Copenhagen; Kobenhavn Denmark
| | - M. Roig
- School of Physical & Occupational Therapy; Faculty of Medicine; McGill University; Montréal Québec Canada
- Memory and Motor Rehabilitation Laboratory (MEMORY-LAB); Jewish Rehabilitation Hospital; Montreal Center for Interdisciplinary Research in Rehabilitation (CRIR); Montréal Quebec Canada
| | - J. Lundbye-Jensen
- Department of Nutrition, Exercise and Sports; Centre for Team Sport & Health; University of Copenhagen; Kobenhavn Denmark
- Department of Neuroscience & Pharmacology; University of Copenhagen; Kobenhavn Denmark
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8
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Munk H, Fakih D, Sorensen G, Tan Q, Christiansen L, Christensen A, Ejstrup L, Loft A, Kyvik K, Jounblat R, Holmskov U, Junker P. SAT0028 Circulating Surfactant Protein-D (SP-D) Molecular Size Profile Differs between Patients with Untreated Axial Spondyloarthritis and Healthy Control Subjects. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.1936] [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: 11/03/2022]
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9
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Tinggaard J, Wohlfahrt-Veje C, Husby S, Christiansen L, Skakkebaek NE, Jensen TK, Grandjean P, Main KM, Andersen HR. Prenatal pesticide exposure and PON1 genotype associated with adolescent body fat distribution evaluated by dual X-ray absorptiometry (DXA). Andrology 2016; 4:735-44. [PMID: 27230552 DOI: 10.1111/andr.12194] [Citation(s) in RCA: 8] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 02/16/2016] [Accepted: 03/09/2016] [Indexed: 12/16/2022]
Abstract
Many modern pesticides have endocrine disrupting abilities and early-life exposure may affect growth and disease risk later in life. Previously, we reported associations between prenatal pesticide exposure and higher childhood body fat content measured by anthropometry. The associations were affected by child PON1 Q192R genotype. We aimed to study whether prenatal pesticide exposure was still associated with body fat content and distribution in the children at puberty and the potential impact of both maternal and child PON1 Q192R genotype. In this prospective cohort study of 247 children born by occupationally exposed or unexposed women (greenhouse workers and controls) two follow-up examinations (age 10-15 and 11-16 years) including simple anthropometry, skinfold measurements, pubertal staging and blood sampling were performed. Total and regional fat% was determined by dual X-ray absorptiometry (DXA) at age 10-15. Prenatal pesticide exposure was associated with increased total, android, and gynoid fat percentage (DXA) at age 10-15 years after adjustment for sex, socioeconomic status, and puberty (all β = 0.5 standard deviation score (SDS) p < 0.05). Stratified by sex, the associations were significant in girls (total fat: β = 0.7 SDS, android-gynoid ratio: β = 0.1, both p < 0.05), but not in boys. Carrying the R-allele (child or mother, separately, or both) augmented the differences between exposed and unexposed children (total fat: β = 1.0 SDS, β = 0.8 SDS, p < 0.05, respectively, and β = 1.2 SDS, p < 0.01). No exposure-related differences were found if either the child or mother had the QQ wild-type. At age 11-16, exposed children tended to have a higher total fat% estimated by skinfolds than unexposed children (p = 0.06). No significant associations between prenatal exposure and body mass index or waist circumference were found. Prenatal pesticide exposure was associated with higher adolescent body fat content, including android fat deposition, independent of puberty. Girls appeared more susceptible than boys. Furthermore, the association depended on maternal and child PON1 Q192R genotype.
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Affiliation(s)
- J Tinggaard
- Department of Growth and Reproduction, University Hospital of Copenhagen, Rigshospitalet, Copenhagen, Denmark
| | - C Wohlfahrt-Veje
- Department of Growth and Reproduction, University Hospital of Copenhagen, Rigshospitalet, Copenhagen, Denmark
| | - S Husby
- Hans Christian Andersen Children's Hospital, University of Southern Denmark, Odense, Denmark
| | - L Christiansen
- Institute of Public Health, University of Southern Denmark, Odense, Denmark
| | - N E Skakkebaek
- Department of Growth and Reproduction, University Hospital of Copenhagen, Rigshospitalet, Copenhagen, Denmark
| | - T K Jensen
- Department of Growth and Reproduction, University Hospital of Copenhagen, Rigshospitalet, Copenhagen, Denmark.,Institute of Public Health, University of Southern Denmark, Odense, Denmark
| | - P Grandjean
- Institute of Public Health, University of Southern Denmark, Odense, Denmark
| | - K M Main
- Department of Growth and Reproduction, University Hospital of Copenhagen, Rigshospitalet, Copenhagen, Denmark
| | - H R Andersen
- Institute of Public Health, University of Southern Denmark, Odense, Denmark
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10
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Heffner G, Bonner M, Campbell D, Christiansen L, Pierciey FJ, Zhang W, Lewis G, Smurnyy Y, Hamel A, Shah S, Horton H, Ryu B, Goss K, Negre O, Veres G, Horvath C, Finer M, Gregory P. 229. PGE2 Increases Lentiviral Vector Transduction Efficiency of Human HSC. Mol Ther 2016. [DOI: 10.1016/s1525-0016(16)33038-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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11
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Negre O, Bartholomae C, Beuzard Y, Cavazzana M, Christiansen L, Courne C, Deichmann A, Denaro M, de Dreuzy E, Finer M, Fronza R, Gillet-Legrand B, Joubert C, Kutner R, Leboulch P, Maouche L, Paulard A, Pierciey FJ, Rothe M, Ryu B, Schmidt M, von Kalle C, Payen E, Veres G. Preclinical evaluation of efficacy and safety of an improved lentiviral vector for the treatment of β-thalassemia and sickle cell disease. Curr Gene Ther 2015; 15:64-81. [PMID: 25429463 PMCID: PMC4440358 DOI: 10.2174/1566523214666141127095336] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 11/05/2014] [Accepted: 11/14/2014] [Indexed: 01/27/2023]
Abstract
A previously published clinical trial demonstrated the benefit of autologous CD34(+) cells transduced with a selfinactivating lentiviral vector (HPV569) containing an engineered β-globin gene (β(A-T87Q)-globin) in a subject with β thalassemia major. This vector has been modified to increase transduction efficacy without compromising safety. In vitro analyses indicated that the changes resulted in both increased vector titers (3 to 4 fold) and increased transduction efficacy (2 to 3 fold). An in vivo study in which 58 β-thalassemic mice were transplanted with vector- or mock-transduced syngenic bone marrow cells indicated sustained therapeutic efficacy. Secondary transplantations involving 108 recipients were performed to evaluate long-term safety. The six month study showed no hematological or biochemical toxicity. Integration site (IS) profile revealed an oligo/polyclonal hematopoietic reconstitution in the primary transplants and reduced clonality in secondary transplants. Tumor cells were detected in the secondary transplant mice in all treatment groups (including the control group), without statistical differences in the tumor incidence. Immunohistochemistry and quantitative PCR demonstrated that tumor cells were not derived from transduced donor cells. This comprehensive efficacy and safety data provided the basis for initiating two clinical trials with this second generation vector (BB305) in Europe and in the USA in patients with β-thalassemia major and sickle cell disease.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Gabor Veres
- bluebird bio, 150 Second Street, Cambridge, MA 02141, USA.
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12
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Underwood JG, Procino I, Christiansen L, Maurer J, Stapelfeldt H. Velocity map imaging with non-uniform detection: Quantitative molecular axis alignment measurements via Coulomb explosion imaging. Rev Sci Instrum 2015; 86:073101. [PMID: 26233350 DOI: 10.1063/1.4922137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We present a method for inverting charged particle velocity map images which incorporates a non-uniform detection function. This method is applied to the specific case of extracting molecular axis alignment from Coulomb explosion imaging probes in which the probe itself has a dependence on molecular orientation which often removes cylindrical symmetry from the experiment and prevents the use of standard inversion techniques for the recovery of the molecular axis distribution. By incorporating the known detection function, it is possible to remove the angular bias of the Coulomb explosion probe process and invert the image to allow quantitative measurement of the degree of molecular axis alignment.
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Affiliation(s)
- Jonathan G Underwood
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
| | - I Procino
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
| | - L Christiansen
- Department of Chemistry, University of Aarhus, DK-8000 Århus C, Denmark
| | - J Maurer
- Department of Chemistry, University of Aarhus, DK-8000 Århus C, Denmark
| | - H Stapelfeldt
- Department of Chemistry, University of Aarhus, DK-8000 Århus C, Denmark
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13
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Zimmermann E, Ängquist LH, Mirza SS, Zhao JH, Chasman DI, Fischer K, Qi Q, Smith AV, Thinggaard M, Jarczok MN, Nalls MA, Trompet S, Timpson NJ, Schmidt B, Jackson AU, Lyytikäinen LP, Verweij N, Mueller-Nurasyid M, Vikström M, Marques-Vidal P, Wong A, Meidtner K, Middelberg RP, Strawbridge RJ, Christiansen L, Kyvik KO, Hamsten A, Jääskeläinen T, Tjønneland A, Eriksson JG, Whitfield JB, Boeing H, Hardy R, Vollenweider P, Leander K, Peters A, van der Harst P, Kumari M, Lehtimäki T, Meirhaeghe A, Tuomilehto J, Jöckel KH, Ben-Shlomo Y, Sattar N, Baumeister SE, Smith GD, Casas JP, Houston DK, März W, Christensen K, Gudnason V, Hu FB, Metspalu A, Ridker PM, Wareham NJ, Loos RJF, Tiemeier H, Sonestedt E, Sørensen TIA. Is the adiposity-associated FTO gene variant related to all-cause mortality independent of adiposity? Meta-analysis of data from 169,551 Caucasian adults. Obes Rev 2015; 16:327-340. [PMID: 25752329 PMCID: PMC4564522 DOI: 10.1111/obr.12263] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Accepted: 12/12/2014] [Indexed: 11/28/2022]
Abstract
Previously, a single nucleotide polymorphism (SNP), rs9939609, in the FTO gene showed a much stronger association with all-cause mortality than expected from its association with body mass index (BMI), body fat mass index (FMI) and waist circumference (WC). This finding implies that the SNP has strong pleiotropic effects on adiposity and adiposity-independent pathological pathways that leads to increased mortality. To investigate this further, we conducted a meta-analysis of similar data from 34 longitudinal studies including 169,551 adult Caucasians among whom 27,100 died during follow-up. Linear regression showed that the minor allele of the FTO SNP was associated with greater BMI (n = 169,551; 0.32 kg m(-2) ; 95% CI 0.28-0.32, P < 1 × 10(-32) ), WC (n = 152,631; 0.76 cm; 0.68-0.84, P < 1 × 10(-32) ) and FMI (n = 48,192; 0.17 kg m(-2) ; 0.13-0.22, P = 1.0 × 10(-13) ). Cox proportional hazard regression analyses for mortality showed that the hazards ratio (HR) for the minor allele of the FTO SNPs was 1.02 (1.00-1.04, P = 0.097), but the apparent excess risk was eliminated after adjustment for BMI and WC (HR: 1.00; 0.98-1.03, P = 0.662) and for FMI (HR: 1.00; 0.96-1.04, P = 0.932). In conclusion, this study does not support that the FTO SNP is associated with all-cause mortality independently of the adiposity phenotypes.
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Affiliation(s)
- E Zimmermann
- Institute of Preventive Medicine, Bispebjerg and Frederiksberg Hospitals, The Capital Region, Copenhagen, Denmark
| | - L H Ängquist
- Institute of Preventive Medicine, Bispebjerg and Frederiksberg Hospitals, The Capital Region, Copenhagen, Denmark
| | - S S Mirza
- Department of Epidemiology, Erasmus Medical Centre, Rotterdam, The Netherlands
| | - J H Zhao
- MRC Epidemiology Unit, Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
| | - D I Chasman
- Division of Preventive Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA.,Harvard Medical School, Boston, Massachusetts, USA
| | - K Fischer
- Estonian Genome Center, University of Tartu, Tartu, Estonia
| | - Q Qi
- Department of Epidemiology and Population Health, Albert Einstein College of Medicine, New York, New York, USA
| | - A V Smith
- Icelandic Heart Association, Kopavogur, Iceland.,University of Icelandic, Reykajvik, Iceland
| | - M Thinggaard
- The Danish Aging Research Center and The Danish Twin Registry, Epidemiology, Biostatistics and Biodemography, Institute of Public Health, University of Southern Denmark, Odense, Denmark
| | - M N Jarczok
- Mannheim Institute of Public Health, Social and Preventive Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - M A Nalls
- Laboratory of Neurogenetics, Intramural Research Program, National Institute on Aging, Bethesda, Maryland, USA
| | - S Trompet
- Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands.,Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands
| | - N J Timpson
- MRC Integrative Epidemiology Unit (IEU), University of Bristol, Bristol, UK
| | - B Schmidt
- Institute for Medical Informatics, Biometry and Epidemiology, University of Duisburg-Essen, Essen, Germany
| | - A U Jackson
- Department of Biostatistics and Center for Statistical Genetics, University of Michigan, Ann Arbor, Michigan, USA
| | - L P Lyytikäinen
- Department of Clinical Chemistry, Fimlab Laboratories, Tampere, Finland.,School of Medicine, University of Tampere, Tampere, Finland
| | - N Verweij
- Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - M Mueller-Nurasyid
- Department of Medicine I, Ludwig-Maximilians-University, Munich, Germany.,Institute of Medical Informatics, Biometry and Epidemiology, Chair of Genetic Epidemiology, Ludwig-Maximilians-Universität, Munich, Germany.,Institute of Genetic Epidemiology, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany.,Deutsches Forschungszentrum für Herz-Kreislauferkrankungen (DZHK), Partner site Munich Heart Alliance, Munich, Germany
| | - M Vikström
- Karolinska Institutet, Institute of Environmental Medicine, Unit of Cardiovascular Epidemiology, Stockholm, Sweden
| | - P Marques-Vidal
- Department of Internal Medicine, Internal Medicine, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | - A Wong
- MRC Unit for Lifelong Health and Ageing, University College London, London, UK
| | - K Meidtner
- Department of Molecular Epidemiology, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany.,Department of Epidemiology, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany
| | - R P Middelberg
- QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - R J Strawbridge
- Atherosclerosis Research Unit, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
| | - L Christiansen
- The Danish Aging Research Center and The Danish Twin Registry, Epidemiology, Biostatistics and Biodemography, Institute of Public Health, University of Southern Denmark, Odense, Denmark
| | | | - K O Kyvik
- Institute of Regional Health Services Research and Odense Patient data Explorative Network, Odense University Hospital, Odense, Denmark
| | - A Hamsten
- Atherosclerosis Research Unit, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
| | - T Jääskeläinen
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
| | - A Tjønneland
- Danish Cancer Society Research Centre, Copenhagen, Denmark
| | - J G Eriksson
- Diabetes Prevention Unit, Department of Chronic Disease Prevention, National Institute for Health and Welfare, Helsinki, Finland.,Department of General Practice and Primary Health Care, Institute of Clinical Medicine, University of Helsinki, Helsinki, Finland.,Folkhälsan Research Centre, Helsinki, Finland.,Unit of General Practice, Helsinki University Central Hospital, Helsinki, Finland
| | - J B Whitfield
- QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - H Boeing
- Department of Epidemiology, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany
| | - R Hardy
- MRC Unit for Lifelong Health and Ageing, University College London, London, UK
| | - P Vollenweider
- Department of Internal Medicine, Internal Medicine, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | - K Leander
- Karolinska Institutet, Institute of Environmental Medicine, Unit of Cardiovascular Epidemiology, Stockholm, Sweden
| | - A Peters
- Deutsches Forschungszentrum für Herz-Kreislauferkrankungen (DZHK), Partner site Munich Heart Alliance, Munich, Germany.,Institute of Epidemiology II, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany
| | - P van der Harst
- Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.,Department of Genetic, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.,Durrer Center for Cardiogenetic Research, ICIN-Neterlands Heart Institute, Utrecht, The Netherlands
| | - M Kumari
- Department of Epidemiology and Public Health, University College London, London, UK.,ISER, University of Essex, Colchester, UK
| | - T Lehtimäki
- Department of Clinical Chemistry, Fimlab Laboratories, Tampere, Finland.,School of Medicine, University of Tampere, Tampere, Finland
| | - A Meirhaeghe
- Inserm, U744, Institut Pasteur de Lille, University Lille Nord de France, Lille, France
| | - J Tuomilehto
- Diabetes Prevention Unit, National Institute for Health and Welfare, Helsinki, Finland.,Centre for Vascular Prevention, Danube-University Krems, Krems, Austria.,Instituto de Investigacion Sanitaria del Hospital Universario LaPaz (IdiPAZ), Madrid, Spain.,Diabetes Research Group, King Abdulaziz University, Jeddah, Saudi Arabia
| | - K-H Jöckel
- Institute for Medical Informatics, Biometry and Epidemiology, University of Duisburg-Essen, Essen, Germany
| | - Y Ben-Shlomo
- School of Social and Community Medicine, University of Bristol, Bristol, UK
| | - N Sattar
- BHF Glasgow Cardiovascular Research Centre, Faculty of Medicine, Glasgow, UK
| | - S E Baumeister
- Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany
| | - G Davey Smith
- MRC Integrative Epidemiology Unit (IEU), University of Bristol, Bristol, UK
| | - J P Casas
- Department of Non-Communicable Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, UK.,Institute of Cardiovascular Science, University College London, London, UK
| | - D K Houston
- Department of Internal Medicine, Section on Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston Salem, North Carolina, USA
| | - W März
- Vth Department of Medicine (Nephrology, Hypertensiology, Endocrinology, Diabetology, Rheumatology), Medical Faculty of Mannheim, University of Heidelberg, Mannheim, Germany.,Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria.,Synlab Academy, Synlab Services GmbH, Mannheim, Germany
| | - K Christensen
- The Danish Aging Research Center and The Danish Twin Registry, Epidemiology, Biostatistics and Biodemography, Institute of Public Health, University of Southern Denmark, Odense, Denmark.,Department of Clinical Genetics, Odense University Hospital, Odense, Denmark.,Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Odense, Denmark
| | - V Gudnason
- Icelandic Heart Association, Kopavogur, Iceland.,University of Icelandic, Reykajvik, Iceland
| | - F B Hu
- Department of Nutrition, Harvard School of Public Health, Boston, Massachusetts, USA.,Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, USA
| | - A Metspalu
- Estonian Genome Center, University of Tartu, Tartu, Estonia
| | - P M Ridker
- Division of Preventive Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA.,Harvard Medical School, Boston, Massachusetts, USA
| | - N J Wareham
- MRC Epidemiology Unit, Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
| | - R J F Loos
- MRC Epidemiology Unit, Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK.,The Charles Bronfman Institute for Personalized Medicine, The Mindich Child Health and Development Institute, The Genetics of Obesity and Related Metabolic Traits Program, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - H Tiemeier
- Department of Epidemiology, Erasmus Medical Centre, Rotterdam, The Netherlands.,Department of Child and Adolescent Psychiatry, Erasmus Medical Centre, Rotterdam, The Netherlands.,Department of Psychiatry, Erasmus Medical Centre, Rotterdam, The Netherlands
| | - E Sonestedt
- Department of Clinical Sciences Malmö, Lund University, Malmö, Sweden
| | - T I A Sørensen
- Institute of Preventive Medicine, Bispebjerg and Frederiksberg Hospitals, The Capital Region, Copenhagen, Denmark.,MRC Integrative Epidemiology Unit (IEU), University of Bristol, Bristol, UK.,Novo Nordisk Foundation Centre for Basic Metabolic Research, Section on Metabolic Genetics, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
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14
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Dato S, Soerensen M, Lagani V, Montesanto A, Passarino G, Christensen K, Tan Q, Christiansen L. Contribution of genetic polymorphisms on functional status at very old age: a gene-based analysis of 38 genes (311 SNPs) in the oxidative stress pathway. Exp Gerontol 2014; 52:23-9. [PMID: 24462499 DOI: 10.1016/j.exger.2014.01.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2013] [Revised: 01/03/2014] [Accepted: 01/11/2014] [Indexed: 01/08/2023]
Abstract
Preservation of functional ability is a well-recognized marker of longevity. At a molecular level, a major determinant of the physiological decline occurring with aging is the imbalance between production and accumulation of oxidative damage to macromolecules, together with a decreased efficiency of stress response to avoid or repair such damage. In this paper we investigated the association of 38 genes (311 SNPs) belonging to the pro-antioxidant pathways with physical and cognitive performances, by analyzing single SNP and gene-based associations with Hand Grip strength (HG), Activities of Daily Living (ADL), Walking Speed (WS), Mini Mental State Examination (MMSE) and Composite Cognitive Score (CCS) in a Cohort of 1089 Danish nonagenarians. Moreover, for each gene analyzed in the pro-antioxidant pathway, we tested the influence on longitudinal survival. In the whole sample, nominal associations were found for TXNRD1 variability with ADL and WS, NDUFS1 and UCP3 with HG and WS, GCLC and UCP2 with WS (p<0.05). Stronger associations although not holding the multiple comparison correction, were observed between MMSE and NDUFV1, MT1A and GSTP1 variability (p<0.009). Moreover, we found that association between genetic variability in the pro-antioxidant pathway and functional status at old age is influenced by sex. In particular, most significant associations were observed in nonagenarian females, between HG scores and GLRX and UCP3 variability, between ADL levels and TXNRD1, MMSE and MT1A genetic variability. In males, a borderline statistically significant association with ADL level was found for UQCRFS1 gene. Nominally significant associations in relation to survival were found in the female sample only with SOD2, NDUFS1, UCP3 and TXNRD1 variability, the latter two confirming previous observations reported in the same cohort. Overall, our work supports the evidence that genes belonging to the pro-anti-oxidant pathway are able to modulate physical and cognitive performance after the ninth decade of life, finally influencing extreme survival.
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Affiliation(s)
- S Dato
- Department of Biology, Ecology and Heart Sciences, University of Calabria, Ponte Pietro Bucci cubo 4C, 87036 Rende, CS, Italy; The Danish Aging Research Center, Epidemiology, Institute of Public Health, University of Southern Denmark, J.B. Winslows Vej 9B, 5000 Odense C, Denmark.
| | - M Soerensen
- The Danish Aging Research Center, Epidemiology, Institute of Public Health, University of Southern Denmark, J.B. Winslows Vej 9B, 5000 Odense C, Denmark; Department of Clinical Genetics, Odense University Hospital, Sdr. Boulevard 29, 5000 Odense C, Denmark.
| | - V Lagani
- Bio Informatics Laboratory, Institute of Computer Science, Foundation for Research and Technology (Hellas), Heraklion, Greece.
| | - A Montesanto
- Department of Biology, Ecology and Heart Sciences, University of Calabria, Ponte Pietro Bucci cubo 4C, 87036 Rende, CS, Italy.
| | - G Passarino
- Department of Biology, Ecology and Heart Sciences, University of Calabria, Ponte Pietro Bucci cubo 4C, 87036 Rende, CS, Italy.
| | - K Christensen
- The Danish Aging Research Center, Epidemiology, Institute of Public Health, University of Southern Denmark, J.B. Winslows Vej 9B, 5000 Odense C, Denmark; Department of Clinical Genetics, Odense University Hospital, Sdr. Boulevard 29, 5000 Odense C, Denmark; Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Sdr. Boulevard 29, 5000 Odense C, Denmark.
| | - Q Tan
- The Danish Aging Research Center, Epidemiology, Institute of Public Health, University of Southern Denmark, J.B. Winslows Vej 9B, 5000 Odense C, Denmark; Department of Clinical Genetics, Odense University Hospital, Sdr. Boulevard 29, 5000 Odense C, Denmark.
| | - L Christiansen
- The Danish Aging Research Center, Epidemiology, Institute of Public Health, University of Southern Denmark, J.B. Winslows Vej 9B, 5000 Odense C, Denmark; Department of Clinical Genetics, Odense University Hospital, Sdr. Boulevard 29, 5000 Odense C, Denmark.
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15
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Christiansen L, Toftager M, Linke B, Ersbøll A, Troelsen J. Adolescent walking and biking to school in the Danish SPACE Study: The influence of individual, social and school site factors. J Sci Med Sport 2012. [DOI: 10.1016/j.jsams.2012.11.508] [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: 10/27/2022]
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16
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Frost M, Petersen I, Brixen K, Beck-Nielsen H, Holst JJ, Christiansen L, Højlund K, Christensen K. Adult glucose metabolism in extremely birthweight-discordant monozygotic twins. Diabetologia 2012; 55:3204-12. [PMID: 22955993 DOI: 10.1007/s00125-012-2695-x] [Citation(s) in RCA: 21] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Accepted: 06/21/2012] [Indexed: 01/20/2023]
Abstract
AIMS/HYPOTHESIS Low birthweight (BW) is associated with increased risk of type 2 diabetes. We compared glucose metabolism in adult BW-discordant monozygotic (MZ) twins, thereby controlling for genetic factors and rearing environment. METHODS Among 77,885 twins in the Danish Twin Registry, 155 of the most BW-discordant MZ twin pairs (median BW difference 0.5 kg) were assessed using a 2 h oral glucose tolerance test with sampling of plasma (p-)glucose, insulin, C-peptide, glucose-dependent insulinotropic polypeptide and glucagon-like peptide-1. HOMA for beta cell function (HOMA-β) and insulin resistance (HOMA-IR), and also insulin sensitivity index (BIGTT-SI) and acute insulin response (BIGTT-AIR), were calculated. Subgroup analyses were performed in those with: (1) double verification of BW difference; (2) difference in BW >0.5 kg; and (3) no overt metabolic disease (type 2 diabetes, hyperlipidaemia or thyroid disease). RESULTS No intra-pair differences in p-glucose, insulin, C-peptide, incretin hormones, HOMA-β, HOMA-IR or BIGTT-SI were identified. p-Glucose at 120 min was higher in the twins with the highest BW without metabolic disease, and BIGTT-AIR was higher in those with the highest BW although not in pairs with a BW difference of >0.5 kg. CONCLUSIONS/INTERPRETATION BW-discordant MZ twins provide no evidence for a detrimental effect of low BW on glucose metabolism in adulthood once genetic factors and rearing environment are controlled for.
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Affiliation(s)
- M Frost
- The Danish Twin Registry, Department of Epidemiology, University of Southern Denmark, JB Winsløvsvej 9, Odense C, Denmark.
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17
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Madsen T, Christiansen L, Nielsen T, Troelsen J, Schipperijn J, Duncan S. Associations between a walkability index and bicycle use in Denmark. J Sci Med Sport 2012. [DOI: 10.1016/j.jsams.2012.11.657] [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: 10/27/2022]
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18
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Toftager M, Duncan S, Oliver M, Kristensen P, Christiansen L, Troelsen J. Physical activity in adolescents–Accelerometer data reduction criteria: Number of valid days, minimum daily wear time, and non-wear time. J Sci Med Sport 2012. [DOI: 10.1016/j.jsams.2012.11.159] [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: 10/27/2022]
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19
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Mengel-From J, Christensen K, Thinggaard M, McGue M, Christiansen L. Genetic variants in the choline acetyltransferase (ChAT) gene are modestly associated with normal cognitive function in the elderly. Genes Brain Behav 2011; 10:876-82. [PMID: 21883924 DOI: 10.1111/j.1601-183x.2011.00728.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Genetic variants in the choline acetyltransferase (ChAT) gene have been suggested as risk factors for neurodegenerative Alzheimer's disease (AD). Here we tested the importance of genetic variants in the ChAT gene in normal cognitive function of elderly in a study sample of Danish twins and singletons (N = 2070). The ChAT rs3810950 A allele, which has been associated with increased risk for AD, was found to be associated with a decrease cognitive status evaluated by a five-component cognitive composite score [P = 0.03, regression coefficient -0.30, 95% confidence interval (CI) -0.57 to -0.02], and the rs3810950 and rs8178990 ancestral GC haplotype was also associated with better cross-sectional cognitive composite score (P = 0.04, regression coefficient 0.59, 95% CI 0.03 to 1.16). Growth curve model analyses applied to up to 10 years of follow-up data showed that the rs3810950 A allele was associated with a lower cognitive composite score and Mini Mental State Examination at the lowest age (73 years of age), and was lower in the whole interval 73-82 although the absolute difference became smaller with age. Stratification by the presence of the APOE ε4 allele showed that rs3810950 AG/non-APOE ε4 carriers and rs3810950 AA/APOE ε4 carriers were associated with a lower cognitive composite score in younger elderly 73-83 years of age, similar to previous reports of association with AD.
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Affiliation(s)
- J Mengel-From
- The Danish Aging Research Center, Epidemiology Unit, Institute of Public Health, University of Southern Denmark, Odense, Denmark.
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20
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Krustrup P, Hansen PR, Andersen LJ, Jakobsen MD, Sundstrup E, Randers MB, Christiansen L, Helge EW, Pedersen MT, Søgaard P, Junge A, Dvorak J, Aagaard P, Bangsbo J. Long-term musculoskeletal and cardiac health effects of recreational football and running for premenopausal women. Scand J Med Sci Sports 2010; 20 Suppl 1:58-71. [PMID: 20546545 DOI: 10.1111/j.1600-0838.2010.01111.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We examined long-term musculoskeletal and cardiac adaptations elicited by recreational football (FG, n=9) and running (RG, n=10) in untrained premenopausal women in comparison with a control group (CG, n=9). Training was performed for 16 months ( approximately 2 weekly 1-h sessions). For FG, right and left ventricular end-diastolic diameters were increased by 24% and 5% (P<0.05), respectively, after 16 months. Right ventricular systolic function measured by tricuspid annular plane systolic excursion (TAPSE) increased (P<0.05) in FG after 4 months and further (P<0.05) after 16 months (15% and 32%, respectively). In RG and CG, cardiac structure, E/A and TAPSE remained unchanged. For FG, whole-body bone mineral density (BMD) was 2.3% and 1.3% higher (P<0.05) after 16 months, than after 4 and 0 months, respectively, with no changes for RG and CG. FG demonstrated substantial improvements (P<0.05) in fast (27% and 16%) and slow (16% and 17%) eccentric muscle strength and rapid force capacity (Imp30ms: 66% and 65%) after 16 months compared with 4 and 0 months, with RG improving Imp30ms by 64% and 46%. In conclusion, long-term recreational football improved muscle function, postural balance and BMD in adult women with a potential favorable influence on the risk of falls and fractures. Moreover, football training induced consistent cardiac adaptations, which may have implications for long-term cardiovascular health.
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Affiliation(s)
- P Krustrup
- Department of Exercise and Sport Sciences, Section of Human Physiology, University of Copenhagen, Copenhagen, Denmark.
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Randers MB, Nybo L, Petersen J, Nielsen JJ, Christiansen L, Bendiksen M, Brito J, Bangsbo J, Krustrup P. Activity profile and physiological response to football training for untrained males and females, elderly and youngsters: influence of the number of players. Scand J Med Sci Sports 2010; 20 Suppl 1:14-23. [DOI: 10.1111/j.1600-0838.2010.01069.x] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.1] [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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22
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Christiansen L, Tan Q, Kruse T, McGue M, Christensen K. Candidate region linkage analysis in twins discordant or concordant for depression symptomatology. Am J Med Genet B Neuropsychiatr Genet 2009; 150B:581-4. [PMID: 18698577 PMCID: PMC3622891 DOI: 10.1002/ajmg.b.30841] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Genetic risk factors contribute considerably to both clinical affective disorders and subsyndromal mood level. There is moreover evidence to suggest that the genetic basis of bipolar disorder and unipolar depression overlap to some extent, and several linkage analyses have suggested evidence for a common susceptibility locus in affective disorders on chromosome 12q24. In this study we investigated the chromosome 12 candidate region for linkage to the mean level of depression symptomatology, over a 10-year follow-up, using a highly informative sample of concordant and discordant twin pairs selected from 4,731 participants of the Longitudinal Study of Ageing Danish Twins. Our results showed suggestive evidence of linkage to this region with a peak LOD score of 1.91 for marker D12S1634 located at 148 cM, and thus indicates that the previously identified disease locus at 12q24 is also a general vulnerability locus affecting the normal range of mood.
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Affiliation(s)
- L. Christiansen
- Epidemiology, Institute of Public Health, University of Southern Denmark, Odense, Denmark,Department of Biochemistry, Pharmacology and Genetics, Odense University Hospital, Odense, Denmark,Correspondence to: Dr. L. Christiansen, Department of Biochemistry, Pharmacology and Genetics, Odense University Hospital, Sdr. Boulevard 29, 5000 Odense C, Denmark.
| | - Q. Tan
- Epidemiology, Institute of Public Health, University of Southern Denmark, Odense, Denmark,Department of Biochemistry, Pharmacology and Genetics, Odense University Hospital, Odense, Denmark
| | - T.A. Kruse
- Department of Biochemistry, Pharmacology and Genetics, Odense University Hospital, Odense, Denmark
| | - M. McGue
- Epidemiology, Institute of Public Health, University of Southern Denmark, Odense, Denmark,Department of Psychology, University of Minnesota, Minneapolis, Minnesota
| | - K. Christensen
- Epidemiology, Institute of Public Health, University of Southern Denmark, Odense, Denmark
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23
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Krabbe KS, Mortensen EL, Avlund K, Pilegaard H, Christiansen L, Pedersen AN, Schroll M, Jørgensen T, Pedersen BK, Bruunsgaard H. Genetic priming of a proinflammatory profile predicts low IQ in octogenarians. Neurobiol Aging 2007; 30:769-81. [PMID: 17913303 DOI: 10.1016/j.neurobiolaging.2007.08.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2007] [Revised: 07/11/2007] [Accepted: 08/21/2007] [Indexed: 01/22/2023]
Abstract
The purpose of the study was to test the hypothesis that single nucleotide polymorphisms (SNPs) within interleukin (IL)-18, TNF-alpha, IL-6 and IL-10 gene promoter regions are risk factors for cognitive decline in healthy octogenarians, and to isolate the strongest inflammatory biomarkers of cognitive function in the peripheral blood. The Wechsler Adult Intelligence Scale was administered to 112 individuals at ages 80 and 85. An IL-18 haplotype was an independent risk factor of poor Performance IQ. The TNF-308GA genotype was related to individual declines in Verbal IQ, and the IL-10-592 CC genotype was related to better Verbal IQ at the age of 80. Circulating levels of TNF-alpha, sTNFRs, and IL-6 were negatively correlated with IQ at age 85 and less strongly to IQ at age 80 with activation of the TNF system as the strongest biomarker. In conclusion, SNPs related to high proinflammatory or low anti-inflammatory activity are independent risk factors of reduced cognitive function in octogenarians. Only the IL-18 haplotype was associated with inflammation in the peripheral blood and only with regard to circulating TNF-alpha.
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Affiliation(s)
- K S Krabbe
- The Centre of Inflammation and Metabolism, Department of Infectious Diseases and CMRC, Rigshospitalet, Faculty of Health Sciences, University of Copenhagen, Denmark.
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24
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Lambert JC, Ferreira S, Gussekloo J, Christiansen L, Brysbaert G, Slagboom E, Cottel D, Petit T, Hauw JJ, DeKosky ST, Richard F, Berr C, Lendon C, Kamboh MI, Mann D, Christensen K, Westendorp R, Amouyel P. Evidence for the association of the S100beta gene with low cognitive performance and dementia in the elderly. Mol Psychiatry 2007; 12:870-80. [PMID: 17579612 DOI: 10.1038/sj.mp.4001974] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Variations in the S100beta gene may be instrumental in producing a continuum from mild cognitive decline to overt dementia. After screening 25 single nucleotide polymorphisms (SNPs) in S100beta, we observed association of the rs2300403 intron 2 SNP with poorer cognitive function in three independent populations. Moreover, we detected a significant association of this SNP with increased risk of developing dementia or Alzheimer's disease (AD) in six independent populations, especially in women and in the oldest. Furthermore, we characterised a new primate-specific exon within intron 2 (the corresponding mRNA isoform was called S100beta2). S100beta2 expression was increased in AD brain compared with controls, and the rs2300403 SNP was associated with elevated levels of S100beta2 mRNA in AD brains, especially in women. Therefore, this genetic variant in S100beta increases the risk of low cognitive performance and dementia, possibly by favouring a splicing event increasing S100beta2 isoform expression in the brain.
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Affiliation(s)
- J-C Lambert
- INSERM U744, Institut Pasteur de Lille, Université de Lille 2, Lille, France.
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Zyskin AG, Avetisov AK, Kuchaev VL, Shapatina EN, Christiansen L. Simulation of the kinetics of complex heterogeneous catalytic reactions under diffusion limitations. Kinet Catal 2007. [DOI: 10.1134/s0023158407030019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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26
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Christiansen L, Brasch-Andersen C, Bathum L, Kruse TA, Christensen K. A longitudinal study of the effect of GSTT1 and GSTM1 gene copy number on survival. Mech Ageing Dev 2006; 127:597-9. [PMID: 16574194 DOI: 10.1016/j.mad.2006.02.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2005] [Revised: 02/10/2006] [Accepted: 02/23/2006] [Indexed: 10/24/2022]
Abstract
Deletions of the glutathione S-transferase superfamily genes GSTT1 and GSTM1 has been associated with oxidative stress related diseases and recently explored as factors implicated in longevity as well. Reported results have been conflicting, which may partially be caused by the traditional use of assays unable to discriminate between carriers of one or two functional genes. Using a quantitative realtime PCR method facilitating quantification of gene copy number, we evaluated the influence of GSTT1 and GSTM1 gene deletions on longevity in a longitudinal study of 681 elderly Danish twins. The mean follow-up time was 7.6 years and during this time a total of 294 deaths occurred. The results demonstrated a non-significant trend for carriage of two copies of the GSTM1 functional gene to be a protective factor, whereas both heterozygosity and homozygosity for the GSTT1 functional gene was associated with a moderate but significant increased mortality in women (hazard rate 2.46 (CI95: 1.43-4.23) and 2.22 (CI95: 1.25-3.94) for one and two alleles, respectively). To our knowledge, this is the first longitudinal study exploring the influence of GST gene polymorphisms on longevity and these data implies that GST gene copy numbers do affect mortality risk in the elderly.
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Affiliation(s)
- L Christiansen
- Department of Epidemiology, Institute of Public Health, University of Southern Denmark, Denmark.
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Lovell JM, Moate RM, Christiansen L, Findlay MM. The relationship between body size and evoked potentials from the statocysts of the prawn Palaemon serratus. J Exp Biol 2006; 209:2480-5. [PMID: 16788031 DOI: 10.1242/jeb.02211] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [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: 11/20/2022]
Abstract
SUMMARY
The organisation of the statocyst hair cells and auditory evoked potentials(AEPs) generated by the afferents in three body size classes of prawn(Palaemon serratus) have been studied using a combination of anatomical, electron microscopic and electrophysiological approaches. The statistical examination of the relationship between the sensory setae and body size showed an increase in both the length and number of statocyst hair cells as the animal grows. In view of this finding, the response of the statocyst organ to a 500 Hz tone burst was recorded from four specimens from each size class using two subcutaneous electrodes, positioned in the carapace close to the supraoesophageal ganglion and statocyst. Neither body size nor the number of afferents in the statocyst has any significant impact on the amplitude of AEPs in response to the 500 Hz tone burst. The findings of this study show that P. serratus is capable of hearing a 500 Hz tone regardless of body size, a finding that is of ecological importance when considering the effect of anthropogenic sound on crustaceans.
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Affiliation(s)
- J M Lovell
- School of Earth, Ocean and Environmental Sciences and University of Plymouth, Drake Circus, Plymouth PL4 8AA, UK.
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Tan Q, Christiansen L, Bathum L, Zhao JH, Vach W, Vaupel JW, Christensen K, Kruse TA. Haplotype Effects on Human Survival: Logistic Regression Models Applied to Unphased Genotype Data. Ann Hum Genet 2005. [DOI: 10.1046/j.1469-1809.2004.00143.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Christiansen L, Brøns-Poulsen J, Hørder M, Brock A, Petersen NE. Expression and characterization of six clinically relevant uroporphyrinogen decarboxylase gene mutations. Scand J Clin Lab Invest 2005; 65:227-35. [PMID: 16095052 DOI: 10.1080/00365510510013631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The functional consequence of six uroporphyrinogen decarboxylase (UROD) gene mutations found in Danish patients with familial porphyria cutanea tarda was investigated. Wild-type UROD and the 6 mutants (3 missense, 1 nonsense and 2 frameshift mutants) were cloned and expressed using the prokaryotic gGEX-6P system, in which the protein is produced in fusion with glutathione S-transferase (GST). Enzymatic activity of the purified recombinant mutant fusion proteins ranged from undetectable to less than 12% of the recombinant wild-type protein. Mutant proteins cleaved from the GST part did not retain any catalytic activity. These observations can be ascribed to the structure/function relationships of the enzyme, and the fact that the enzyme is a dimer in its active form. Although the clinical manifestation of familial porphyria cutanea tarda is complex, the findings support the notion that different mutations may affect individuals differently.
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Affiliation(s)
- L Christiansen
- Department of Clinical Biochemistry and Clinical Genetics, Odense University Hospital, Odense, Denmark.
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Brøns-Poulsen J, Christiansen L, Petersen NE, Hørder M, Kristiansen K. Characterization of two isoalleles and three mutations in both isoforms of purified recombinant human porphobilinogen deaminase. Scand J Clin Lab Invest 2005; 65:93-105. [PMID: 16025832 DOI: 10.1080/00365510410003075] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Defects in the enzyme porphobilinogen deaminase (PBG-D) are associated with acute intermittent porphyria (AIP). Human PBG-D is transcribed into a housekeeping or an erythroid form as a result of differential promoter usage and splicing. In addition, three pairs of isoallelic forms have been described. However, whether the enzymatic properties of housekeeping and erythroid forms differ is unknown. In this study the two isoallelic forms, K210 and E210, were cloned and expressed in Escherichia coli together with three mutations associated with a clinical AIP phenotype. The mutations were introduced in the K210 isoallelic background and expressed as both the housekeeping and the erythroid form. The proteins were expressed as GST fusions and purified to homogeneity. Initial experiments revealed that the GST-PBG-D fusions and the purified PBG-D obtained by proteolytic removal of the GST moiety had enzymatic properties that were indistinguishable. Consequently, all analyses with mutant PBG-D were performed on the GST-fusion proteins. Comparison of the wild-type proteins revealed a significant difference in Km between isoalleles with a Km of 9 microM for K210 and 7 microM for E210, whereas no significant difference in activity or kinetics between the housekeeping and the erythroid isoforms was observed. The mutant proteins showed 0.3-1.0% wild-type activity, depending on mutation. There was a clear correlation between yield of recombinant protein and CRIM status of patients. Furthermore, co-expression of the mutant proteins with the bacterial chaperone GroESL did not affect protein yield or function to any significant extent, supporting the view that the investigated mutations primarily influence structure and function and not folding of the proteins.
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Tan Q, Christiansen L, Bathum L, Zhao JH, Vach W, Vaupel JW, Christensen K, Kruse TA. Haplotype effects on human survival: logistic regression models applied to unphased genotype data. Ann Hum Genet 2005; 69:168-75. [PMID: 15720298 DOI: 10.1046/j.1529-8817.2004.00143.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
Haplotype based linkage disequilibrium (LD) mapping exhibits higher power than the single locus approach because it makes use of the LD information contained in the flanking markers. New statistical methods have been proposed to help to infer haplotype effects on human diseases using multi-locus genotype data collected from unrelated individuals. In this paper, we introduce a statistical procedure for measuring haplotype effects on human survival using the popular logistic regression model with haplotype based parameterizations. By modeling haplotype frequency as a function of age, our model infers haplotype effects by estimating and testing the slope parameters under different genetic mechanisms (multiplicative, dominant, or recessive). In addition, by estimating the sex-specific slope parameters, our model allows the detection of sex-specific haplotype effects or haplotype-sex interactions. As an example, we apply our model to an empirical dataset on a stress related gene, interleukin-6, to look for haplotypes that affect individual survival and for haplotype-sex interactions. We show that our logistic regression based haplotype model can be a helpful tool for researchers interested in the genetics of human aging and longevity.
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Affiliation(s)
- Q Tan
- Department of Clinical Biochemistry and Genetics, Odense University Hospital, Sdr. Boulevard 29, DK-5000 Odense C, Denmark.
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Tan Q, De Benedictis G, Yashin AI, Bathum L, Christiansen L, Dahlgaard J, Frizner N, Vach W, Vaupel JW, Christensen K, Kruse TA. Assessing genetic association with human survival at multi-allelic loci. Biogerontology 2005; 5:89-97. [PMID: 15105583 DOI: 10.1023/b:bgen.0000025072.30441.1c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Genetic variation plays an important role in natural selection and population evolution. However, it also presents geneticists interested in aging research with problems in data analysis because of the large number of alleles and their various modes of action. Recently, a new statistical method based on survival analysis (the relative risk model or the RR model) has been introduced to assess gene-longevity associations [Yashin et al. (1999) Am J Hum Genet 65: 1178-1193] which outperforms the traditional gene frequency method. Here we extend the model to deal with polymorphic genes or gene markers. Assuming the Hardy-Weinberg equilibrium at birth, we first introduce an allele-based parameterization on gene frequency which helps to cut down the number of frequency parameters to be estimated. We then propose both the genotype and allele-based parameterizations on risk parameters to estimate genotype and allelic relative risks (the GRR and ARR models). While the GRR model allows us to investigate whether the alleles are recessive, dominant or codominant, the ARR model further minimizes the number of parameters to be estimated. As an example, we apply the methods to empirical data on Renin gene polymorphism and longevity. We show that our models can serve as useful tools in searching for important genetic variations implicated in human aging and longevity.
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Affiliation(s)
- Qihua Tan
- Department of Clinical Biochemistry and Genetics, KKA, Odense University Hospital, Odense, Denmark.
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Christiansen L, Bathum L, Andersen-Ranberg K, Jeune B, Christensen K. Modest implication of interleukin-6 promoter polymorphisms in longevity. Mech Ageing Dev 2005; 125:391-5. [PMID: 15130757 DOI: 10.1016/j.mad.2004.03.004] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2004] [Revised: 03/01/2004] [Accepted: 03/05/2004] [Indexed: 10/26/2022]
Abstract
The multifunctional interleukin-6 has been suggested to contribute to a chronic low-grade inflammatory status, thereby conferring susceptibility to age-related pathological conditions as well as functional decline and increased mortality. Several polymorphisms have been identified in the interleukin-6 promoter, but investigation of the effect of these on interleukin-6 levels and disease susceptibility have led to contradictory results. This study investigates the significance of the three single-point polymorphisms (-597G/A, -572G/C and -174G/C) and the AT-stretch polymorphism (-373(A)n(T)m) in ageing, by comparison of the frequency of each single polymorphism separately as well as the entire promoter haplotype in a total of 1710 Danish subjects ranging in age from 47 to 100 years. We found a modest, but significant, increase in the frequency of interleukin-6 -174GG homozygotes with age suggesting that this genotype is advantageous for longevity.
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Affiliation(s)
- L Christiansen
- Department of Epidemiology, Institute of Public Health, University of Southern Denmark, Odense, Denmark.
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Tan Q, Bathum L, Christiansen L, De Benedictis G, Dahlgaard J, Frizner N, Vach W, Vaupel JW, Yashin AI, Christensen K, Kruse TA. Logistic regression models for polymorphic and antagonistic pleiotropic gene action on human aging and longevity. Ann Hum Genet 2004; 67:598-607. [PMID: 14641247 DOI: 10.1046/j.1529-8817.2003.00051.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In this paper, we apply logistic regression models to measure genetic association with human survival for highly polymorphic and pleiotropic genes. By modelling genotype frequency as a function of age, we introduce a logistic regression model with polytomous responses to handle the polymorphic situation. Genotype and allele-based parameterization can be used to investigate the modes of gene action and to reduce the number of parameters, so that the power is increased while the amount of multiple testing minimized. A binomial logistic regression model with fractional polynomials is used to capture the age-dependent or antagonistic pleiotropic effects. The models are applied to HFE genotype data to assess the effects on human longevity by different alleles and to detect if an age-dependent effect exists. Application has shown that these methods can serve as useful tools in searching for important gene variations that contribute to human aging and longevity.
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Affiliation(s)
- Qihua Tan
- Department of Clinical Biochemistry and Genetics, KKA, Odense University Hospital, Odense, Denmark.
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Abstract
The antioxidant enzyme paraoxonase 1 (PON1) has previously been suggested to confer protection against coronary heart disease (CHD), one of the main causes of death in the Western world. Two coding polymorphisms, 55M/L and 192Q/R, and a promoter variant, -107C/T, has been extensively studied with respect to susceptibility to CHD. In this study, we have investigated the impact of these three polymorphisms on mortality using a sample of 1932 Danish individuals aged 47-93 years, previously used in gene-longevity studies. A cross-sectional study comparing the genotype distribution of the three polymorphisms separately as well as the haplotype distribution in different age groups did not reveal any difference. However, a longitudinal follow-up study on survival in the same sample indicated that 192RR homozygotes have a poorer survival compared to QQ homozygotes (hazard rate: 1.38, P = 0.04). We hereafter used an independent sample of 541 Danish individuals from the oldest cohort and confirmed the initial findings (hazard rate: 1.38, P = 0.09). In both samples, the effect was most pronounced in women. Using self-reported data on ischemic heart disease to evaluate the impact of the PON 192Q/R polymorphism on susceptibility to CHD, we found only a nonsignificant trend of 192RR homozygosity in women being a risk factor. Our results thus indicates that PON1 192RR homozygosity is associated with increased mortality in women in the second half of life and that this increased mortality is possibly related to CHD severity and survival after CHD rather than susceptibility to development of CHD.
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Affiliation(s)
- L Christiansen
- Epidemiology, Institute of Public Health, University of Southern Denmark, Odense, Denmark.
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Xu L, Chi N, Yvind K, Christiansen L, Oxenløwe L, Mørk J, Jeppesen P, Hanberg J. 7x 40 Gb/s base-rate RZ all-optical broadcasting utilizing an electroabsorption modulator. Opt Express 2004; 12:416-420. [PMID: 19474839 DOI: 10.1364/opex.12.000416] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We experimentally demonstrate all-optical broadcasting through simultaneous 7 x 40 Gb/s base-rate wavelength conversion in RZ format based on cross absorption modulation in an electroabsorption modulator. In this experiment the original intensity-modulated information is successfully duplicated onto seven wavelengths that comply with the ITU-T proposal. The advantages of the proposed wavelength conversion scheme are also discussed.
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Kuchaev VL, Shapatina EN, Zyskin AG, Christiansen L, Avetisov AK. Method for Estimating Efficiency Factors for Complex Reactions: I. Reactions Occurring via Several Stoichiometric Equations. Kinetics and Catalysis 2003. [DOI: 10.1023/b:kica.0000009061.98806.38] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Christiansen L, Karjalainen M, Seppänen-Laakso T, Hiltunen R, Yliruusi J. Effect of beta-sitosterol on precipitation of cholesterol from non-aqueous and aqueous solutions. Int J Pharm 2003; 254:155-66. [PMID: 12623191 DOI: 10.1016/s0378-5173(03)00007-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [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: 10/27/2022]
Abstract
The aim of the present work was to study the solubility and phase behaviour of the beta-sitosterol-cholesterol mixed crystals in the presence and absence of water. Cholesterol, beta-sitosterol and 3:1, 1:1 and 1:3 mixtures of these were co-precipitated from acetone and acetone-water solutions. Precipitated crystals were analysed using powder X-ray diffraction (PXRD), differential scanning calorimetry (DSC), optical microscopy and Karl-Fischer titrimetry. The quantification of the sterols in solutions was preformed using GC-MS. The solubility of the sterols was mutually limiting. In the aqueous system, the solubility of both the sterols were significantly lower than in the absence of water, but the decrease in the solubility was considerably greater with the more hydrophobic beta-sitosterol. In the aqueous system, the total sterol solubility decreased with the increasing proportion of beta-sitosterol. The formation of new crystal structures, solid solutions of cholesterol and beta-sitosterol, was observed in non-aqueous as well as in aqueous environments except with the lowest cholesterol proportion in the system, in which case mixed crystals with eutectic behaviour were formed.
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Affiliation(s)
- L Christiansen
- Department of Pharmacy, Division of Pharmaceutical Technology, University of Helsinki, PO Box 56, FIN-00014 University of Helsinki, Finland.
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Fisher AT, Davis EE, Hutnak M, Spiess V, Zühlsdorff L, Cherkaoui A, Christiansen L, Edwards K, Macdonald R, Villinger H, Mottl MJ, Wheat CG, Becker K. Hydrothermal recharge and discharge across 50 km guided by seamounts on a young ridge flank. Nature 2003; 421:618-21. [PMID: 12571592 DOI: 10.1038/nature01352] [Citation(s) in RCA: 194] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2002] [Accepted: 11/26/2002] [Indexed: 11/09/2022]
Abstract
Hydrothermal circulation within the sea floor, through lithosphere older than one million years (Myr), is responsible for 30% of the energy released from plate cooling, and for 70% of the global heat flow anomaly (the difference between observed thermal output and that predicted by conductive cooling models). Hydrothermal fluids remove significant amounts of heat from the oceanic lithosphere for plates typically up to about 65 Myr old. But in view of the relatively impermeable sediments that cover most ridge flanks, it has been difficult to explain how these fluids transport heat from the crust to the ocean. Here we present results of swath mapping, heat flow, geochemistry and seismic surveys from the young eastern flank of the Juan de Fuca ridge, which show that isolated basement outcrops penetrating through thick sediments guide hydrothermal discharge and recharge between sites separated by more than 50 km. Our analyses reveal distinct thermal patterns at the sea floor adjacent to recharging and discharging outcrops. We find that such a circulation through basement outcrops can be sustained in a setting of pressure differences and crustal properties as reported in independent observations and modelling studies.
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Affiliation(s)
- A T Fisher
- Earth Sciences Department, University of California, Santa Cruz, California 95064, USA.
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Bathum L, Christiansen L, Nybo H, Ranberg KA, Gaist D, Jeune B, Petersen NE, Vaupel J, Christensen K. Association of mutations in the hemochromatosis gene with shorter life expectancy. Arch Intern Med 2001; 161:2441-4. [PMID: 11700156 DOI: 10.1001/archinte.161.20.2441] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
BACKGROUND To investigate whether the frequency of carriers of mutations in the HFE gene associated with hereditary hemochromatosis diminishes with age as an indication that HFE mutations are associated with increased mortality. It is of value in the debate concerning screening for hereditary hemochromatosis to determine the significance of heterozygosity. METHODS Genotyping for mutations in exons 2 and 4 of the HFE gene using denaturing gradient gel electrophoresis in 1784 participants aged 45 to 100 years from 4 population-based studies: all 183 centenarians from the Danish Centenarian Study, 601 people aged 92 to 93 years from the Danish 1905 Cohort, 400 aged 70 to 94 years from the Longitudinal Study of Aging Danish Twins, and 600 aged 45 to 67 years from a study of middle-aged Danish twins. RESULTS All participants (N=1784) were screened for mutations in exon 4, and a trend toward fewer heterozygotes for the C282Y mutation-the mutation most often associated with hereditary hemochromatosis-was found. This was significant for the whole population (P=.005) and for women (P=.004) but not for men (P=.26). A group of 599 participants was screened for mutations in exon 2, and there was no variation in the distribution of mutations in exon 2 in the different age groups. CONCLUSIONS In a high-carrier frequency population like Denmark, mutations in HFE show an age-related reduction in the frequency of heterozygotes for C282Y, which suggests that carrier status is associated with shorter life expectancy.
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Affiliation(s)
- L Bathum
- Department of Clinical Biochemistry, Odense University Hospital, Sdr. Blvd 29, DK-5000 Odense C, Denmark.
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42
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Christiansen L, Bygum A, Käehne M, Jensen A, Hørder M, Petersen NE. Mutation screening of the entire coding region of the protoporphyrinogen oxidase gene using denaturing gradient gel electrophoresis and denaturing hplc. Clin Chem 2001; 47:1115-7. [PMID: 11375304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Affiliation(s)
- L Christiansen
- Department of Clinical Biochemistry and Clinical Genetics, Odense University Hospital, DK-5000 Odense C, Denmark.
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43
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Christiansen L, Bygum A, Jensen A, Thomsen K, Brandrup F, Hørder M, Petersen NE. Association between CYP1A2 polymorphism and susceptibility to porphyria cutanea tarda. Hum Genet 2000; 107:612-4. [PMID: 11153915 DOI: 10.1007/s004390000415] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.6] [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: 11/29/2022]
Abstract
Individuals with the most common form of the porphyrias, porphyria cutanea tarda (PCT), are believed to be genetically predisposed to development of clinically overt disease through mutations and polymorphisms in genes associated with known precipitating factors. In this study, we have examined a group of Danish patients with PCT for the presence of the C/A polymorphism in intron 1 of CYP1A2. The results demonstrate that the frequency of the highly inducible A/A genotype is increased in both familial and sporadic PCT. This suggests that inheritance of this genotype is a susceptibility factor in development of PCT.
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Affiliation(s)
- L Christiansen
- Department of Clinical Biochemistry and Clinical Genetics, Odense University Hospital, Denmark.
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44
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Christiansen L, Bygum A, Jensen A, Brandrup F, Thomsen K, Horder M, Petersen NE. Uroporphyrinogen decarboxylase gene mutations in Danish patients with porphyria cutanea tarda. Scand J Clin Lab Invest 2000; 60:611-5. [PMID: 11202053 DOI: 10.1080/003655100448365] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [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: 10/27/2022]
Abstract
Decreased uroporphyrinogen decarboxylase (UROD) activity is a characteristic feature of the most common of the porphyrias, porphyria cutanea tarda (PCT). A subgroup of the clinically overt PCT cases is associated with mutations in the gene encoding UROD and inherited as an autosomal-dominant trait. In this study, DNAs from 53 Danish PCT patients were subjected to genetic analysis for UROD mutations using denaturing gradient gel electrophoresis. Eleven genetic variations, seven of which are possible disease causing, were identified. All but one of these mutations were previously unknown, lending further support to the assumption that PCT is a heteroallelic disease. Only 11% of the examined patients were previously recognized as familial PCT cases. However, possible disease-related UROD mutations were identified in 24% of the examined patients, indicating that genetic analysis of PCT patients may improve differentiation between familial and sporadic PCT cases.
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Affiliation(s)
- L Christiansen
- Department of Clinical Biochemistry and Clinical Genetics, Odense University Hospital, Denmark.
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45
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Petersen NE, Käehne M, Christiansen L, Brock A, Hother-Nielsen O, Rasmussen K. DGGE analysis of the coproporphyrinogen oxidase gene: two new mutations in DNA from Danish patients with hereditary coproporphyria. Scand J Clin Lab Invest 2000; 60:617-25. [PMID: 11202054 DOI: 10.1080/003655100448374] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The knowledge of at least 21 different mutations and several polymorphisms in the coproporphyrinogen oxidase (CPO) gene demonstrates that the molecular basis of hereditary coproporphyria is heterogeneous. We developed a DGGE-based assay for the analysis of exons 2 to 7, including 14-96 nucleotides of the flanking intronic sequences of the CPO gene. To render it suitable for the clinical diagnostic laboratory, we designed the assay to allow use of identical PCR conditions and the same DGGE gel for analyses of all the regions. Using this assay, and subsequent sequencing of gene regions containing interallelic variations, two novel mutations in the CPO gene were identified: a missense mutation (607G-->A), leading to the substitution of an alanine with a threonine, and a nonsense mutation (1281G-->A), giving rise to a stop codon 28 codons upstream to the wild-type stop codon.
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Affiliation(s)
- N E Petersen
- Department for Clinical Biochemistry and Clinical Genetics, Odense University Hospital, Denmark.
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46
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Bygum A, Brandrup F, Christiansen L, Petersen NE. [Porphyria cutanea tarda]. Ugeskr Laeger 2000; 162:2020-4. [PMID: 10815515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Porphyria cutanea tarda (PCT), the most common porphyria disease, is characterized by blistering and skin fragility of sun-exposed skin. The symptoms are caused by lowered activity of uroporphyrinogen decarboxylase (URO-D) resulting in accumulation of water-soluble porphyrins in the skin. Most PCT cases are sporadic but can be familiar due to mutations in the URO-D gene located on chromosome number 1. The disease may be exacerbated by environmental factors. Iron accumulation is a characteristic finding and there is an association to hereditary haemochromatosis. Therapeutic venesection reduces the iron load and the uroporphyrins are mobilized by treatment with hydroxychloroquine. An increased risk of liver cirrhosis and hepatocellular carcinoma may presumably be reduced by early diagnosis and treatment.
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Affiliation(s)
- A Bygum
- Odense Universitetshospital, dermato-venerologisk afdeling I
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47
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Lane NE, Lin P, Christiansen L, Gore LR, Williams EN, Hochberg MC, Nevitt MC. Association of mild acetabular dysplasia with an increased risk of incident hip osteoarthritis in elderly white women: the study of osteoporotic fractures. Arthritis Rheum 2000; 43:400-4. [PMID: 10693881 DOI: 10.1002/1529-0131(200002)43:2<400::aid-anr21>3.0.co;2-d] [Citation(s) in RCA: 136] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE To determine if acetabular dysplasia increases the risk of incident hip osteoarthritis (OA) among elderly white women. METHODS Baseline and followup anteroposterior pelvic radiographs were obtained a mean of 8 years apart, and read for individual radiographic features (IRFs) of hip OA; summary grades (0-4) were then assigned based on the IRFs present. Acetabular dysplasia was defined by the results of measurements of the acetabular depth (<9 mm) or the center-edge angle (<30 degrees). Logistic regression analyses were performed to determine the association between acetabular dysplasia and incident hip OA, and all analyses were adjusted for age, current weight, body mass index, affected side, and investigational site. RESULTS The odds ratios for the association of abnormal center-edge angle and acetabular dysplasia with incident hip OA were 3.3 (95% confidence interval 1.1-10.1) and 2.8 (95% confidence interval 1.0-7.9), respectively. CONCLUSION Acetabular dysplasia, defined by a decrease in the center-edge angle, is associated with a modestly increased risk of incident hip OA in elderly white women.
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Affiliation(s)
- N E Lane
- Division of Rheumatology, University of California at San Francisco, 94143, USA
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48
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Nielsen HV, Lauemøller SL, Christiansen L, Buus S, Fomsgaard A, Petersen E. Complete protection against lethal Toxoplasma gondii infection in mice immunized with a plasmid encoding the SAG1 gene. Infect Immun 1999; 67:6358-63. [PMID: 10569750 PMCID: PMC97042 DOI: 10.1128/iai.67.12.6358-6363.1999] [Citation(s) in RCA: 103] [Impact Index Per Article: 4.1] [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: 11/20/2022] Open
Abstract
Infection with the protozoan parasite Toxoplasma gondii is transmitted to humans from infected animals by tissue cysts and oocysts excreted by cats. Immunization with inactivated parasites or recombinant proteins has at best shown partial protection. We constructed a plasmid expressing the SAG1 surface antigen of T. gondii, p1tPASAG1, and showed that animals immunized with the plasmid produce anti-SAG1 antibodies which recognize the native SAG1. Mice immunized with p1tPASAG1 showed 80 to 100% protection against challenge with the non-cyst-producing, virulent RH isolate, compared to an 80% mortality in mice immunized with empty plasmid, which is the greatest efficacy of any vaccine against T. gondii produced so far. The SAG1 molecule was analyzed for potential cytotoxic T-lymphocyte (CTL) epitopes, and four peptides with the best fit were synthesized. The ability of the peptides to stimulate gamma interferon production by CD8(+) T cells from p1tPASAG1-immunized mice was tested in an ELISPOT assay, and one new CTL epitope was identified. Adoptive transfer of CD8(+) T cells from p1tPASAG1-immunized to naïve mice showed partial protection. In conclusion, DNA vaccination with p1tPASAG1 gave effective protection in mice against T. gondii infection and the protection could be adoptively transferred by purified CD8(+) T cells.
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Affiliation(s)
- H V Nielsen
- Department of Mycobacteria and Parasitology, Statens Serum Institut, University of Copenhagen, Copenhagen, Denmark.
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49
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Christiansen L, Bygum A, Thomsen K, Brandrup F, Hørder M, Petersen NE. Denaturing gradient gel electrophoresis analysis of the hemochromatosis (HFE) gene: impact of HFE gene mutations on the manifestation of porphyria cutanea tarda. Clin Chem 1999; 45:2025-6. [PMID: 10545080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Affiliation(s)
- L Christiansen
- Department of Clinical Biochemistry and Clinical Genetics, Odense University Hospital, 5000 Odense C, Denmark.
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50
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Christiansen L, Ged C, Hombrados I, Brons-Poulsen J, Fontanellas A, de Verneuil H, Hørder M, Petersen NE. Screening for mutations in the uroporphyrinogen decarboxylase gene using denaturing gradient gel electrophoresis. Identification and characterization of six novel mutations associated with familial PCT. Hum Mutat 1999; 14:222-32. [PMID: 10477430 DOI: 10.1002/(sici)1098-1004(1999)14:3<222::aid-humu5>3.0.co;2-v] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [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: 11/05/2022]
Abstract
The two porphyrias, familial porphyria cutanea tarda (fPCT) and hepatoerythropoietic porphyria (HEP), are associated with mutations in the gene encoding the enzyme uroporphyrinogen decarboxylase (UROD). Several mutations, most of which are private, have been identified in HEP and fPCT patients, confirming the heterogeneity of the underlying genetic defects of these diseases. We have established a denaturing gradient gel electrophoresis (DGGE) assay for mutation detection in the UROD gene, enabling the simultaneous screening for known and unknown mutations. The established assay has proved able to detect the underlying UROD mutation in 10 previously characterized DNA samples as well as a new mutation in each of six previously unexamined PCT patients. The six novel UROD mutations comprise three missense mutations (M01T, F229L, and M324T), two splice mutations (IVS3-2A-->T and IVS5-2A-->G) leading to exon skipping, and a 2-bp deletion (415-416delTA) resulting in a frameshift and the introduction of a premature stop codon. Heterologous expression and enzymatic studies of the mutant proteins demonstrate that the three mutations leading to shortening or truncation of the UROD protein have no residual catalytic activity, whereas the two missense mutants retained some residual activity. Furthermore, the missense mutants exhibited a considerable increase in thermolability. The six new mutations bring to a total of 29 the number of disease-related mutations in the UROD gene. The DGGE assay presented greatly improves the genetic diagnosis of fPCT and HEP, thereby facilitating the detection of familial UROD deficient patients as well as the discrimination between familial and sporadic PCT cases.
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Affiliation(s)
- L Christiansen
- Department of Clinical Biochemistry and Clinical Genetics, Odense University Hospital, Odense, Denmark.
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