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Affiliation(s)
- E. Schwab
- Department of Applied Natural Sciences and Industrial Engineering, Deggendorf Institute of Technology, Deggendorf, Germany
| | - S. Pogrebnoj
- Department of Applied Natural Sciences and Industrial Engineering, Deggendorf Institute of Technology, Deggendorf, Germany
| | - M. Freund
- Department of Applied Natural Sciences and Industrial Engineering, Deggendorf Institute of Technology, Deggendorf, Germany
| | - F. Flossmann
- Department of Applied Natural Sciences and Industrial Engineering, Deggendorf Institute of Technology, Deggendorf, Germany
| | - S. Vogl
- Department of Computer Science and Mathematics, University of Applied Sciences Munich, Munich, Germany
| | - K.-H. Frommolt
- Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Berlin, Germany
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Vissing J, Johnson K, Töpf A, Nafissi S, Díaz-Manera J, French VM, Schindler RF, Sarathchandra P, Løkken N, Rinné S, Freund M, Decher N, Müller T, Duno M, Krag T, Brand T, Straub V. POPDC3 Gene Variants Associate with a New Form of Limb Girdle Muscular Dystrophy. Ann Neurol 2019; 86:832-843. [PMID: 31610034 DOI: 10.1002/ana.25620] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [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: 08/16/2018] [Revised: 10/07/2019] [Accepted: 10/07/2019] [Indexed: 12/26/2022]
Abstract
OBJECTIVE The Popeye domain containing 3 (POPDC3) gene encodes a membrane protein involved in cyclic adenosine monophosphate (cAMP) signaling. Besides gastric cancer, no disease association has been described. We describe a new muscular dystrophy associated with this gene. METHODS We screened 1,500 patients with unclassified limb girdle weakness or hyperCKemia for pathogenic POPDC3 variants. Five patients carrying POPDC3 variants were examined by muscle magnetic resonance imaging (MRI), muscle biopsy, and cardiac examination. We performed functional analyses in a zebrafish popdc3 knockdown model and heterologous expression of the mutant proteins in Xenopus laevis oocytes to measure TREK-1 current. RESULTS We identified homozygous POPDC3 missense variants (p.Leu155His, p.Leu217Phe, and p.Arg261Gln) in 5 patients from 3 ethnically distinct families. Variants affected highly conserved residues in the Popeye (p.Leu155 and p.Leu217) and carboxy-terminal (p.Arg261) domains. The variants were almost absent from control populations. Probands' muscle biopsies were dystrophic, and serum creatine kinase levels were 1,050 to 9,200U/l. Muscle weakness was proximal with adulthood onset in most patients and affected lower earlier than upper limbs. Muscle MRI revealed fat replacement of paraspinal and proximal leg muscles; cardiac investigations were unremarkable. Knockdown of popdc3 in zebrafish, using 2 different splice-site blocking morpholinos, resulted in larvae with tail curling and dystrophic muscle features. All 3 mutants cloned in Xenopus oocytes caused an aberrant modulation of the mechano-gated potassium channel, TREK-1. INTERPRETATION Our findings point to an important role of POPDC3 for skeletal muscle function and suggest that pathogenic variants in POPDC3 are responsible for a novel type of autosomal recessive limb girdle muscular dystrophy. ANN NEUROL 2019;86:832-843.
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Affiliation(s)
- John Vissing
- Copenhagen Neuromuscular Center, Rigshospitalet, University of Copenhagen, Denmark
| | - Katherine Johnson
- John Walton Muscular Dystrophy Research Centre, Institute of Genetic Medicine, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Ana Töpf
- John Walton Muscular Dystrophy Research Centre, Institute of Genetic Medicine, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom
| | - Shahriar Nafissi
- Department of Neurology, Iranian Center of Neurological Research, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Jordi Díaz-Manera
- Unitat de Malalties Neuromusculars, Servei de Neurologia, Hospital de la Santa Creu i Sant Pau de Barcelona and CIBERER, Madrid, Spain
| | - Vanessa M French
- Developmental Dynamics, Myocardial Function, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Roland F Schindler
- Developmental Dynamics, Myocardial Function, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Padmini Sarathchandra
- Heart Science Centre, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Nicoline Løkken
- Copenhagen Neuromuscular Center, Rigshospitalet, University of Copenhagen, Denmark
| | - Susanne Rinné
- Institute for Physiology and Pathophysiology, AG Vegetative Physiology, Philipps-University of Marburg, Marburg, Germany
| | - Max Freund
- Institute for Physiology and Pathophysiology, AG Vegetative Physiology, Philipps-University of Marburg, Marburg, Germany
| | - Niels Decher
- Institute for Physiology and Pathophysiology, AG Vegetative Physiology, Philipps-University of Marburg, Marburg, Germany
| | - Thomas Müller
- Institute for Molecular Plant Physiology and Biophysics, Julius-von-Sachs Platz 2, 97082, Würzburg, Germany
| | - Morten Duno
- Department of Clinical Genetics, Rigshospitalet, University of Copenhagen, Denmark
| | - Thomas Krag
- Copenhagen Neuromuscular Center, Rigshospitalet, University of Copenhagen, Denmark
| | - Thomas Brand
- Developmental Dynamics, Myocardial Function, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Volker Straub
- John Walton Muscular Dystrophy Research Centre, Institute of Genetic Medicine, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
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Ravanat C, Freund M, Schuhler S, Grunert P, Meyer L, Cazenave JP. Species Specific Immunoassays to Measure Blood Platelet and Coagulation Activation in the Rat. Thromb Haemost 2018. [DOI: 10.1055/s-0038-1650711] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
SummaryThe purpose of this study was to develop specific and sensitive immunoassays to detect early indices of hypercoagulability in the rat. Rat platelet factor 4 (rPF4) and rat fibrinopeptide A (rFPA) assays, tools for the detection of activation of platelets and coagulation respectively, were designed using antibodies raised against purified rPF4 and against synthetic rFPA. The relevance of these new assays and of the commercially available ELISA kit for thrombin-antithrombin III (TAT) complexes was demonstrated in a rat model of a prethrombotic state induced by intravenous infusion of varying doses of thromboplastin (90 to 2400 μl/kg/h). In this model, the immunoassays allowed simultaneous detection of low levels of rFPA and rPF4 which were correlated with fibrinogen and platelet consumption and TAT generation and further proved to be of higher sensitivity than the classical methods of platelet count or measurement of fibrinogen levels. Plasma concentrations of rFPA, rPF4 and TAT were dependent on infusion time and thromboplastin dose, while hirudin (1 mg/kg) prevented their appearance. Thus the new specific immunoassays for rPF4 and rFPA and the commercial human TAT assay represent useful tools for pathophysiological studies or the screening of antithrombotic drugs in rats.
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Affiliation(s)
- C Ravanat
- NSERM U.311, Etablissement de Transfusion Sanguine de Strasbourg, Strasbourg
| | - M Freund
- NSERM U.311, Etablissement de Transfusion Sanguine de Strasbourg, Strasbourg
- Laboratoire Centeon, Lingolsheim, France
| | - S Schuhler
- NSERM U.311, Etablissement de Transfusion Sanguine de Strasbourg, Strasbourg
| | - P Grunert
- NSERM U.311, Etablissement de Transfusion Sanguine de Strasbourg, Strasbourg
| | - L Meyer
- Laboratoire Centeon, Lingolsheim, France
| | - J-P Cazenave
- NSERM U.311, Etablissement de Transfusion Sanguine de Strasbourg, Strasbourg
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Léger P, Magues JP, Freund M, Cazenave JP, Boneu B. Comparison of the Antithrombotic Effects of Heparin, Hirudin and Clopidogrel according to the Nature of the Thrombogenic Surface in an Arterioarterial Shunt in Rats. Thromb Haemost 2017. [DOI: 10.1055/s-0037-1614358] [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: 10/17/2022]
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Metse AP, Wiggers J, Wye P, Wolfenden L, Freund M, Clancy R, Stockings E, Terry M, Allan J, Colyvas K, Prochaska JJ, Bowman JA. An integrated smoking intervention for mental health patients: a randomised controlled trial. Eur J Public Health 2016. [DOI: 10.1093/eurpub/ckw172.067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Strassel C, Bull A, Moog S, Receveur N, Mallo L, Mangin P, Eckly A, Freund M, Dubart-Kupperschmitt A, Gachet C, Lanza F. Lentiviral gene rescue of a Bernard-Soulier mouse model to study platelet glycoprotein Ibβ function. J Thromb Haemost 2016; 14:1470-9. [PMID: 27148783 DOI: 10.1111/jth.13355] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 03/29/2016] [Indexed: 12/01/2022]
Abstract
UNLABELLED Essentials A signaling role of glycoprotein (GP)Ibβ is postulated but not formally demonstrated in platelets. Lentiviral-mediated rescue in knock-out mice can be used to evaluate GPIbβ function in vivo. Transduction of the native subunit corrected the main defects associated with GPIb-IX deficiency Deletion of intracellular 159-170 segment increased thrombosis, 150-160 removal increased bleeding. SUMMARY Background The platelet glycoprotein (GP)Ib-V-IX complex is required for normal hemostasis and megakaryopoiesis. A role in GPIb-dependent responses has been ascribed to the less well characterized GPIbβ subunit using a specific antibody and GPIb-IX transfected cells. Objectives Our aim was to evaluate, in vivo, the role of the GPIbβ in hemostasis and thrombosis. Methods GPIbβ(null) Sca-1(+) progenitors transduced with viral particles harboring hGPIbβ were transplanted into lethally irradiated GPIbβ(-/-) recipient mice. Results hGPIbβ transplanted into the bone marrow of GPIbβ(null) mice rescued GPIb-IX expression in 97% of circulating platelets. These platelets efficiently bound von Willebrand factor (VWF) and extended filopodia on a VWF matrix, demonstrating the restoration of GPIb-dependent adhesive and signaling properties. These mice exhibited less severe macrothrombocytopenia and had normal tail bleeding times as compared with GPIbβ(null) mice. This strategy was employed to manipulate and evaluate the role of the GPIbβ intracellular domain. Removal of the membrane proximal segment (Δ(150-160) ) decreased GPIb-IX expression by 43%, confirming its involvement in receptor assembly and biosynthesis, and resulted in increased bleeding times and decreased thrombosis in a mechanical injury model in the aorta. On the other hand, deletion of the C-flanking 159-170 segment allowed normal GPIb-IX expression, VWF-dependent responses and bleeding times, but resulted in enhanced arterial thrombosis. Conclusion This pointed to a repressor role of GPIbβ in thrombus formation in vivo that was not predicted in studies of heterologous cells. These results highlight the utility of this lentiviral strategy for the structure-function evaluation of GPIb-IX in platelets.
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Affiliation(s)
- C Strassel
- UMR_S949 INSERM, Strasbourg, France
- Etablissement Français du Sang (EFS)-Alsace, Strasbourg, France
- Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
- Université de Strasbourg, Strasbourg, France
| | - A Bull
- Etablissement Français du Sang (EFS)-Alsace, Strasbourg, France
- Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
- Université de Strasbourg, Strasbourg, France
| | - S Moog
- UMR_S949 INSERM, Strasbourg, France
- Etablissement Français du Sang (EFS)-Alsace, Strasbourg, France
- Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
- Université de Strasbourg, Strasbourg, France
| | - N Receveur
- UMR_S949 INSERM, Strasbourg, France
- Etablissement Français du Sang (EFS)-Alsace, Strasbourg, France
- Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
- Université de Strasbourg, Strasbourg, France
| | - L Mallo
- UMR_S949 INSERM, Strasbourg, France
- Etablissement Français du Sang (EFS)-Alsace, Strasbourg, France
- Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
- Université de Strasbourg, Strasbourg, France
| | - P Mangin
- UMR_S949 INSERM, Strasbourg, France
- Etablissement Français du Sang (EFS)-Alsace, Strasbourg, France
- Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
- Université de Strasbourg, Strasbourg, France
| | - A Eckly
- UMR_S949 INSERM, Strasbourg, France
- Etablissement Français du Sang (EFS)-Alsace, Strasbourg, France
- Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
- Université de Strasbourg, Strasbourg, France
| | - M Freund
- UMR_S949 INSERM, Strasbourg, France
- Etablissement Français du Sang (EFS)-Alsace, Strasbourg, France
- Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
- Université de Strasbourg, Strasbourg, France
| | - A Dubart-Kupperschmitt
- INSERM U1193, Hôpital Paul Brousse, Villejuif, France
- UMR_S1193, Université Paris-Sud, Hôpital Paul Brousse, Villejuif, France
- Département hospitalo-universitaire Hepatinov, Hôpital Paul Brousse, Villejuif, France
| | - C Gachet
- UMR_S949 INSERM, Strasbourg, France
- Etablissement Français du Sang (EFS)-Alsace, Strasbourg, France
- Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
- Université de Strasbourg, Strasbourg, France
| | - F Lanza
- UMR_S949 INSERM, Strasbourg, France
- Etablissement Français du Sang (EFS)-Alsace, Strasbourg, France
- Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
- Université de Strasbourg, Strasbourg, France
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Petersen J, Rehwald R, Freund M, Schönherr E, Haslauer M, Grams A, Loizides A, Glodny B. Verhinderung von Luftembolien bei der transthoracalen Biopsie durch Lagerungsmaßnahmen. ROFO-FORTSCHR RONTG 2016. [DOI: 10.1055/s-0036-1581518] [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: 10/22/2022]
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Caspi-Fluger A, Inbar M, Steinberg S, Friedmann Y, Freund M, Mozes-Daube N, Zchori-Fein E. Characterization of the symbiont Rickettsia in the mirid bug Nesidiocoris tenuis (Reuter) (Heteroptera: Miridae). Bull Entomol Res 2014; 104:681-688. [PMID: 25062354 DOI: 10.1017/s0007485314000492] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Nesidiocoris tenuis (Reuter) (Heteroptera: Miridae) is an omnivorous insect used for biological control. Augmentative release and conservation of N. tenuis have been used for pest control in tomato crops. Intracellular bacterial symbionts of arthropods are common in nature and have diverse effects on their hosts; in some cases they can dramatically affect biological control. Fingerprinting methods showed that the symbiotic complex associated with N. tenuis includes Wolbachia and Rickettsia. Rickettsia of N. tenuis was further characterized by sequencing the 16S rRNA and gltA bacterial genes, measuring its amount in different developmental stages of the insect by real-time polymerase chain reaction, and localizing the bacteria in the insect's body by fluorescence in situ hybridization. The Rickettsia in N. tenuis exhibited 99 and 96% similarity of both sequenced genes to Rickettsia bellii and Rickettsia reported from Bemisia tabaci, respectively. The highest amount of Rickettsia was measured in the 5th instar and adult, and the symbionts could be detected in the host gut and ovaries. Although the role played by Rickettsia in the biology of N. tenuis is currently unknown, their high amount in the adults and localization in the gut suggest that they may have a nutritional role in this insect.
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Affiliation(s)
- A Caspi-Fluger
- Department of Entomology, Newe-Ya'ar Research Center,ARO,Ramat-Yishay 30095,Israel
| | - M Inbar
- Department of Evolutionary and Environmental Biology,University of Haifa,Haifa 31905,Israel
| | - S Steinberg
- BioBee Sde Eliyahu Ltd,Kibbutz Sde Eliyahu 10810,Israel
| | - Y Friedmann
- Bio-Imaging Unit, The Alexander Silberman Institute of Life Sciences,The Hebrew University of Jerusalem,Jerusalem 91904,Israel
| | - M Freund
- BioBee Sde Eliyahu Ltd,Kibbutz Sde Eliyahu 10810,Israel
| | - N Mozes-Daube
- Department of Entomology, Newe-Ya'ar Research Center,ARO,Ramat-Yishay 30095,Israel
| | - E Zchori-Fein
- Department of Entomology, Newe-Ya'ar Research Center,ARO,Ramat-Yishay 30095,Israel
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Kock L, Bertram H, Boekenkamp R, DeWolf D, Ditkivsky I, Freund M, Gewillig M, Happel C, Herberg U, Kampmann C, Karthasyan E, Kozlik-Feldmann R, Kretschmar O, Kuzmenko Y, Milanesi O, Mueller G, Pongiglione G, Schubert S, Tarusinov G, Haas N. Interventional VSD-closure with the Nit-Occlud® Lé VSD-coil in 111 patients - results of the EUREVECO-registry. Thorac Cardiovasc Surg 2014. [DOI: 10.1055/s-0034-1393981] [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: 10/24/2022]
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Freund M. Fallstricke für Chefärzte. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1373243] [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: 10/25/2022]
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Freund M. Wie wird man heute Chefarzt? – Wie suchen Krankenhausleitungen heute Chefärzte? ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1373231] [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: 10/25/2022]
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Freund M, Walther T, von Bohlen Und Halbach O. Effects of the angiotensin-(1-7) receptor Mas on cell proliferation and on the population of doublecortin positive cells within the dentate gyrus and the piriform cortex. Eur Neuropsychopharmacol 2014; 24:302-8. [PMID: 23860355 DOI: 10.1016/j.euroneuro.2013.06.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [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: 01/25/2013] [Revised: 06/19/2013] [Accepted: 06/23/2013] [Indexed: 02/08/2023]
Abstract
Aside from the well-known biologically active angiotensin II, other biologically active angiotensins have been discovered, including angiotensin IV and angiotensin-(1-7). Some years ago, we and others discovered that the Mas proto-oncogene encodes a G protein-coupled receptor being essential for angiotensin-(1-7) signaling. Mas is not only expressed in the periphery but also within the brain, e.g. in the dentate gyrus (DG) and the piriform cortex (PC). Since the DG is capable of adult neurogenesis, we examined the impact of a deletion of Mas upon adult neurogenesis. Deletion of Mas did not alter cell proliferation in the adult DG (as monitored with phosphohistone H3) and did not alter cell death (as monitored with activated Caspase 3). However, Mas deficiency resulted in an increase in the number of doublecortin (DCX) positive cells, indicating that lack of Mas increases the number of this cell population. Concerning the PC, it is discussed whether adult neurogenesis occurs under physiological conditions in this area. We could demonstrate that Mas deficiency has an impact on cell division and on the population of DCX-positive cells within the PC. Since Mas is not expressed before birth within the brain, our data may suggest that adult hippocampal neurogenesis and neurogenesis occurring during prenatal development share several common mechanisms, but are, at least in part, differentially regulated. Moreover, since deficiency for Mas increases the numbers of DCX-positive young neurons, blockage of Mas might be beneficial in stimulating neurogenesis in adults.
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Affiliation(s)
- M Freund
- Institute of Anatomy and Cell Biology, Universitätsmedizin Greifswald, Friedrich Löffler Straße 23c, 17487 Greifswald, Germany
| | - T Walther
- Department of Pharmacology and Therapeutics, University College Cork, Cork, Ireland; Department of Pediatric Surgery, Centre for Fetal Medicine, Division of Women and Child Health, University of Leipzig, Leipzig, Germany; Department of Obstetrics, Centre for Fetal Medicine, Division of Women and Child Health, University of Leipzig, Leipzig, Germany
| | - O von Bohlen Und Halbach
- Institute of Anatomy and Cell Biology, Universitätsmedizin Greifswald, Friedrich Löffler Straße 23c, 17487 Greifswald, Germany.
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Park JY, Singh TR, Nassar N, Zhang F, Freund M, Hanenberg H, Meetei AR, Andreassen PR. Breast cancer-associated missense mutants of the PALB2 WD40 domain, which directly binds RAD51C, RAD51 and BRCA2, disrupt DNA repair. Oncogene 2013; 33:4803-12. [PMID: 24141787 PMCID: PMC3994186 DOI: 10.1038/onc.2013.421] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [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: 02/11/2013] [Revised: 08/29/2013] [Accepted: 09/05/2013] [Indexed: 12/13/2022]
Abstract
Heterozygous carriers of germ-line mutations in the BRCA2/FANCD1, PALB2/FANCN and RAD51C/FANCO DNA repair genes have an increased lifetime risk of developing breast, ovarian and other cancers; bi-allelic mutations in these genes clinically manifest as Fanconi anemia (FA). Here, we demonstrate that RAD51C is part of a novel protein complex that contains PALB2 and BRCA2. Further, the PALB2 WD40 domain can directly and independently bind RAD51C and BRCA2. To understand the role of these homologous recombination (HR) proteins in DNA repair, we functionally characterize effects of missense mutants of the PALB2 WD40 domain that have been reported in breast cancer patients. In contrast to large truncations of PALB2, which display a complete loss of interaction, the L939W, T1030I and L1143P missense mutants/variants of the PALB2 WD40 domain are associated with altered patterns of direct binding to the RAD51C, RAD51 and BRCA2 HR proteins in biochemical assays. Further, the T1030I missense mutant is unstable, whereas the L939W and L1143P proteins are stable but partially disrupt the PALB2-RAD51C-BRCA2 complex in cells. Functionally, the L939W and L1143P mutants display a decreased capacity for DNA double-strand break-induced HR and an increased cellular sensitivity to ionizing radiation. As further evidence for the functional importance of the HR complex, RAD51C mutants that are associated with cancer susceptibility and FA also display decreased complex formation with PALB2. Together, our results suggest that three different cancer susceptibility and FA proteins function in a DNA repair pathway based upon the PALB2 WD40 domain binding to RAD51C and BRCA2.
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Affiliation(s)
- J-Y Park
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Research Foundation, Cincinnati, OH, USA
| | - T R Singh
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Research Foundation, Cincinnati, OH, USA
| | - N Nassar
- 1] Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Research Foundation, Cincinnati, OH, USA [2] Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - F Zhang
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Research Foundation, Cincinnati, OH, USA
| | - M Freund
- Department of Otorhinolaryngology and Head/Neck Surgery, Heinrich Heine University School of Medicine, Duesseldorf, Germany
| | - H Hanenberg
- 1] Department of Otorhinolaryngology and Head/Neck Surgery, Heinrich Heine University School of Medicine, Duesseldorf, Germany [2] Unit of Pediatric Hematology/Oncology, Wells Center for Pediatric Research, Department of Pediatrics, The Riley Hospital, Indiana University School of Medicine, Indianapolis, IN, USA [3] Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - A R Meetei
- 1] Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Research Foundation, Cincinnati, OH, USA [2] Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - P R Andreassen
- 1] Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Research Foundation, Cincinnati, OH, USA [2] Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
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Abstract
OBJECTIVES The microRNA 142 (miR-142) is expressed at high levels in mature hematopoietic cells and has a crucial role during T-lymphocyte development. Its role in leukemogenesis is unclear. PATIENTS AND METHODS Expression of miR-142 was analyzed in acute myeloid and lymphoblastic leukemia cells (de novo, cell lines). Data were compared to expression in CD34+ hematopoietic cells. Based on the miR-142 expression, clinical data such as overall survival was analyzed. RESULTS MiR-142 expression in all leukemia cell lines and 86 % of the de novo samples was higher than in CD34+ cells. This difference could be detected in both, myeloid and lymphoid neoplastic cells. In AML patients with intermediate cytogenetic risk a high miR-142 expression was associated with a better overall survival. CONCLUSIONS MiR-142 expression in acute lymphoblastic as well as myeloid leukemia cells is higher than in CD34+ cells. Additionally, miR-142 expression might have prognostic relevance in AML-patients with otherwise an intermediate cytogenetic risk.
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Affiliation(s)
- M Dahlhaus
- Department of Hematology, University of Rostock, Rostock, Germany
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Weidmann J, Freund M, McGeever-Rubin B. Cytologic Observations on Trypsinized Cells Obtained from Human Endometrial Epithelium in Tissue Culture. J Histotechnol 2013. [DOI: 10.1179/his.1987.10.4.233] [Citation(s) in RCA: 2] [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: 10/31/2022]
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Freund M. Kennzahlen und Ihre Realität - Erfahrungen aus dem Chefarztforum. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1345828] [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: 10/26/2022]
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Freund M. „Endlich Chefarzt in der Radiologie! Was man auf jeden Fall unterlassen sollte“. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346093] [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: 10/26/2022]
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Schmitt M, Xu X, Hilgendorf I, Schneider C, Borchert K, Gläser D, Freund M, Schmitt A. Mobilization of PBSC for allogeneic transplantation by the use of the G-CSF biosimilar XM02 in healthy donors. Bone Marrow Transplant 2013; 48:922-5. [PMID: 23318540 PMCID: PMC3701262 DOI: 10.1038/bmt.2012.270] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [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: 06/28/2012] [Revised: 10/19/2012] [Accepted: 11/21/2012] [Indexed: 11/17/2022]
Abstract
The human recombinant G-CSF filgrastim has been widely used for the mobilization of CD34+ stem cells of healthy donors (HD). In 2008, the G-CSF biosimilar XM02 (Ratiograstim, Tevagrastim and Biograstim) was approved by the European Medicines Agency (EMA) for the mobilization of PBSC. However, there is limited experience in the application of biosimilar G-CSF for the mobilization of PBSC especially in HD. Therefore, we investigated in two cohorts (n=22), the efficacy and safety of PBSC mobilization by either biosimilar G-CSF or reference G-CSF. We observed a similar yield of CD34+ stem cells as well as CD3+ T-cells and nucleated cells in both groups and a safe engraftment in all patients with similar reconstitution of hematopoiesis in all hosts. In summary, we found a comparable efficacy and safety of biosimilar G-CSF when compared with reference G-CSF.
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Affiliation(s)
- M Schmitt
- Department of Hematology, Oncology and Palliative Care, University of Rostock, Rostock, Germany
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Bell C, Finch M, Wolfenden L, Morgan P, Freund M, Jones J, Wiggers J. Predictors of preschool age children's physical activity at long day care. J Sci Med Sport 2012. [DOI: 10.1016/j.jsams.2012.11.271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Herzberg PY, Lee SJ, Heussner P, Mumm FHA, Hilgendorf I, von Harsdorf S, Hemmati P, Rieger K, Greinix HT, Freund M, Holler E, Wolff D. Personality influences quality-of-life assessments in adult patients after allogeneic hematopoietic SCT: results from a joint evaluation of the prospective German Multicenter Validation Trial and the Fred Hutchinson Cancer Research Center. Bone Marrow Transplant 2012; 48:129-34. [PMID: 22609882 DOI: 10.1038/bmt.2012.83] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The influence of personality on health related quality of life (QoL) and physical functioning in the setting of allogeneic hematopoietic SCT (alloHSCT) is unknown. We conducted a joint evaluation within two independent cohorts of alloHSCT recipients to investigate the impact of personality on reported QoL and physical functioning. Two-hundred-eight patients (median age 44 years, range 18-72) of cohort 1 and 93 patients (median age 55 years, range 19-79) of cohort 2 after alloHSCT were evaluated. Personality was assessed using the 24-adjective measure (AM), which measures the Big-Five personality domains and the Life Orientation Test-Revised (LOT-R), measuring optimism and pessimism. QoL was measured using the Functional Assessment of Cancer Therapy with bone marrow transplantation subscale (FACT-BMT), Short Form 36 (SF-36), the human activity profile (HAP), as well as the NIH criteria-based cGVHD activity assessment form and the Lee cGVHD symptom scale. Neuroticism was significantly associated with worse function measured by the HAP and FACT-BMT. Optimism significantly improved QoL captured by the FACT-BMT. Pessimism significantly impaired physical function captured by the HAP and SF-36. Extraversion was significantly associated with reduced depression and lower severity of cGVHD symptoms reported by the patient and the physician. The results suggest that personality traits and pre-treatment QoL assessments should be measured in clinical trials to facilitate the interpretation of QoL data.
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Affiliation(s)
- P Y Herzberg
- Personality Psychology Unit, Faculty of Humanities and Social Sciences, Helmut Schmidt University/University of the Federal Armed Forces Hamburg, Hamburg, Germany
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Freund M. Ärztliche Mitarbeiter finden und binden. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1310603] [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: 10/28/2022]
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22
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Freund M. Endlich Chefarzt in der Radiologie! Was man auf jeden Fall unterlassen sollte - Überlebenstipps aus der Praxis. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1310840] [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: 10/28/2022]
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Scheckenbach K, Wagenmann M, Freund M, Schipper J, Hanenberg H. Squamous cell carcinomas of the head and neck in Fanconi anemia: risk, prevention, therapy, and the need for guidelines. Klin Padiatr 2012; 224:132-8. [PMID: 22504776 DOI: 10.1055/s-0032-1308989] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Fanconi anemia (FA) is a rare recessive DNA repair disorder that is clinically characterized by congenital malformations, progressive bone marrow failure, and increased incidence of malignancies, especially acute myeloid leukemia and squamous cell carcinomas of the head and neck (HNSCCs) and the anogenital regions. On a cellular level, typical features of the disorder are a high degree of genomic instability and an increased sensitivity to bi-functionally alkylating agents. So far, germ-line defects in 15 different FA genes have been identified. Some of these FA genes are also established as tumor susceptibility genes for familiar cancers.In recent years, the prevention and therapy of HNSCCs in FA patients has become more important as the percentage of patients surviving into adulthood is rising. HNSCCs appear in very young FA patients without common risk factors. Since cisplatin-based chemotherapy in combination with radiotherapy, essential parts of the standard treatment approach for sporadic HNSCCs, cannot be used in FA patients due to therapy-associated toxicities and mortalities even with reduced dosing, surgery is the most important treatment option for HNSCCs, in FA patients and requires an early and efficient detection of malignant lesions. So far, no uniform treatment protocol for the management of HNSCCs in FA patients exists. Therefore, we propose that the information on affected FA patients should be collected worldwide, practical therapeutic guidelines developed and national treatment centers established.
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Affiliation(s)
- K Scheckenbach
- Department of Otorhinolaryngology/Head and Neck Surgery, Heinrich Heine University, Düsseldorf, Germany
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Kahl C, Sayer HG, Hinke A, Freund M, Casper J. Early versus late administration of pegfilgrastim after high-dose chemotherapy and autologous hematopoietic stem cell transplantation. J Cancer Res Clin Oncol 2011; 138:513-7. [PMID: 22198675 DOI: 10.1007/s00432-011-1116-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2011] [Accepted: 12/05/2011] [Indexed: 11/29/2022]
Abstract
PURPOSE Single-dose pegylated filgrastim (pegfilgrastim) after autologous hematopoietic stem cell transplantation (AHSCT) showed similar efficacy compared to daily lenograstim. To address the question of the optimal application time, we randomly assigned patients (pts) to pegfilgrastim on day + 1 (Peg1) or day + 4 (Peg4) after AHSCT. METHOD Fifty-three pts with different hematological malignancies were included in this prospective randomized multicenter study. Primary endpoint of this study was time to neutrophil recovery (>500 Gpt/l), and secondary endpoint was time to neutrophil recovery (>1,000 Gpt/l), platelet recovery (>20,000 Gpt/l), number and duration of febrile episodes, i.v. antibiotics, and number of transfusions. Time to engraftment endpoints were estimated according to Kaplan-Meier. RESULTS Median time to neutrophil recovery (>500 Gpt/l) was 10 days (95% CI: 10-11) in Peg1 versus 10 days (95% CI: 10-11) in Peg4 (P = 0.68, logrank test; hazard ratio: 0.93). The corresponding mean values were 10.2 and 10.4 days. Median time to platelet recovery (>20,000 Gpt/l) was 10 (95% CI: 10-11) in Peg1 versus 10 (95% CI: 9-11) in Peg4, again not significantly different (P = 0.54). There was no difference regarding the incidence (67% vs. 60%, P = 0.77, Fisher's exact test) or duration of febrile neutropenia episodes in both groups (median: 1 vs. 1; mean: 2.8 vs. 2.4 days; P = 0.73, Wilcoxon test). CONCLUSION In terms of neutrophil or platelet recovery after AHSCT, number and duration of febrile episodes, the use of i.v. antibiotics, early and late administration of pegfilgrastim are equally effective.
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Affiliation(s)
- C Kahl
- Department of Hematology and Oncology, Klinikum Magdeburg, Birkenallee 34, 39130 Magdeburg, Germany.
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Casper J, Holowiecki J, Trenschel R, Wandt H, Schaefer-Eckart K, Ruutu T, Volin L, Einsele H, Stuhler G, Uharek L, Blau I, Bornhaeuser M, Zander AR, Larsson K, Markiewicz M, Giebel S, Kruzel T, Mylius HA, Baumgart J, Pichlmeier U, Freund M, Beelen DW. Allogeneic hematopoietic SCT in patients with AML following treosulfan/fludarabine conditioning. Bone Marrow Transplant 2011; 47:1171-7. [PMID: 22158386 DOI: 10.1038/bmt.2011.242] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
An alternative reduced-toxicity conditioning regimen for allogeneic transplantation, based on treosulfan and fludarabine, has recently been identified. The safety and efficacy of this new conditioning regimen has been investigated prospectively in patients with AML. A total number of 75 patients with AML in CR were treated with 3 × 14 g/m(2) treosulfan and 5 × 30 mg/m(2) fludarabine, followed by matched sibling or unrelated SCT. Patients were evaluated for engraftment, adverse events, GVHD, and for non-relapse mortality, relapse incidence, overall and disease-free survival (DFS). All patients showed primary engraftment of neutrophils after a median of 20 days. Non-hematological adverse events grade III-IV in severity included mainly infections (59%) and gastrointestinal symptoms (7%). Acute GVHD grade II-IV occurred in 21% and extensive chronic GVHD occurred in 16% of the patients. After a median follow-up of 715 days, the 2-year overall and DFS estimates were 61% and 55%, respectively. The 2-year incidences of relapse and non-relapse mortality reached 34% and 11%, respectively. In summary, our data confirm promising safety and efficacy of the treosulfan-based conditioning therapy in AML patients, ClinicalTrials.gov Identifier: NCT01063660.
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Affiliation(s)
- J Casper
- Division of Hematology and Oncology, University of Rostock, Rostock, Germany.
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Kahl C, Jost K, Knauerhase A, Leithäuser M, Freund M, Bunke D, Rothacker D, Hampel R. [Recurrent hypoglycemia and a large intraabdominal tumor in a 61-year-old woman]. Dtsch Med Wochenschr 2011; 136:2542-6. [PMID: 22131074 DOI: 10.1055/s-0031-1292841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Abstract
HISTORY AND ADMISSION FINDINGS A 61-year-old woman was found unconscious by her husband. The emergency doctor detected hypoglycemia (blood glucose 1.7 mmol/l). This was the first such event, the patient had not been known to have diabetes mellitus. At admission the physical examination and the laboratory findings revealed no abnormalities. INVESTIGATIONS A fasting test was aborted shortly after the start because of the onset of neurological symptoms. An insulinoma was excluded by detecting suppressed levels of insulin and C-peptide. Computed tomography of the abdomen revealed a mesenteric tumour of 9 cm in diameter, which was identified immunhistologically as a grade 1 follicular lymphoma (FL). After exclusion of endocrinological causes the recurrent hypoglycaemia was diagnozed as part of a paraneoplastic syndrome associated with a non-islet cell tumour hypoglycaemia (NICTH) with a newly diagnosed FL. TREATMENT AND COURSE Specific medication with the CD20 antibody rituximab (375 mg/m2, once per week for a total of four cycles) was initiated. There were no further episodes of hypoglycaemia. After one year the patient remains free of any symptoms. CONCLUSIONS After exclusion of any endocrinological reasons for hypoglycemia, differential diagnosis should include NICTH as paraneoplastic syndrome. In rare cases a hematological malignancy may be the underlying disease. The specific treatment of this disease likewise represents the causal treatment of NICTH.
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Affiliation(s)
- C Kahl
- Klinik für Innere Medizin III, Klinikum Magdeburg gGmbH.
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Faiman R, Kirstein O, Freund M, Guetta H, Warburg A. Exclusion of phlebotomine sand flies from inhabited areas by means of vertical mesh barriers. Trans R Soc Trop Med Hyg 2011; 105:512-8. [PMID: 21752415 DOI: 10.1016/j.trstmh.2011.05.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Revised: 05/24/2011] [Accepted: 05/24/2011] [Indexed: 11/25/2022] Open
Abstract
Vector control constitutes an important component of integrated disease control campaigns. Source reduction is not an option for phlebotomine sand fly vectors of leishmaniasis, because larval breeding sites remain either unknown or inaccessible. Thus, all control efforts are directed against the adult sand flies, mostly attempting to limit their contact with humans. We describe experiments using an insecticide-treated vertical barrier to prevent sand flies from reaching inhabited areas of an agricultural settlement. A 400 meter long section of the peripheral fence of Kibbutz Sde Eliyahu, Jordan Valley, Israel was draped with a deltamethrin-impregnated net that is impenetrable to sand flies (polyester net, 450 holes/inch(2)). Sand flies were captured before and after construction of the barrier using CO(2)-baited CDC traps. Sand fly numbers, as monitored around three houses internal to the barrier, exhibited an 84.9% decrease once the barrier was erected (P=0.003). Concurrently, the neighboring control group of three houses, not protected by the barrier, exhibited a 15.9% increase in sand fly numbers (P=0.974). These results corroborate previous findings of field tests conducted on a smaller scale in an arid suburban setting. Campaigns for reducing the burden of sand fly bites and curtailing the transmission of leishmaniasis, should consider integrating vertical fine-mesh nets with other sand fly control measures.
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Affiliation(s)
- R Faiman
- Department of Molecular Genetics and Microbiology, The Institute for Medical Research Israel-Canada, The Kuvin Centre for the Study of Infectious and Tropical Diseases, The Hebrew University-Hadassah Medical School, The Hebrew University of Jerusalem, 91120, Israel
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Hilgendorf I, Freund M, Kropp P, Hartmann S, Krogmann D, Daunke A, Klasen J, Klöcking S, Zettl H, Classen C. Onkologische Erkrankungen bei Jugendlichen und jungen Erwachsenen - Zahlen aus dem Klinischen Krebsregister Rostock als Arbeitsgrundlage für eine interdisziplinäre Herausforderung. ACTA ACUST UNITED AC 2011. [DOI: 10.1055/s-0029-1246000] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Abstract
BACKGROUND The FeCl(3)-induced vascular injury model is widely used to study thrombogenesis in vivo, but the processes leading to vascular injury and thrombosis are poorly defined. OBJECTIVES The aim of our study was to better characterize the mechanisms of FeCl(3)-induced vascular injury and thrombus formation, in order to evaluate the pathophysiological relevance of this model. METHODS FeCl(3) was applied at different concentrations (from 7.5% to 20%) and for different time periods (up to 5 min) to mouse carotid or mesenteric arteries. RESULTS Under all the conditions tested, ultrastructural analysis revealed that FeCl(3) diffused through the vessel wall, resulting in endothelial cell denudation without exposure of the inner layers. Hence, only the basement membrane components were exposed to circulating blood cells and might have contributed to thrombus formation. Shortly after FeCl(3) application, numerous ferric ion-filled spherical bodies appeared on the endothelial cells. Interestingly, platelets could adhere to these spheres and form aggregates. Immunogold labeling revealed important amounts of tissue factor at their surface, suggesting that these spheres may play a role in thrombin generation. In vitro experiments indicated that FeCl(3) altered the ability of adhesive proteins, including collagen, fibrinogen and von Willebrand factor, to support platelet adhesion. Finally, real-time intravital microscopy showed no protection against thrombosis in GPVI-immunodepleted and β(1)(-/-) mice, suggesting that GPVI and β(1) integrins, known to be involved in initial platelet adhesion and activation, do not play a critical role in FeCl(3)-induced thrombus formation. CONCLUSION This model should be used cautiously, in particular to study the earliest stage of thrombus formation.
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Affiliation(s)
- A Eckly
- UMR-S949 Inserm-Université de Strasbourg, Strasbourg, France
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Glass B, Ziepert M, Reiser M, Freund M, Trümper L, Metzner B, Feller A, Loeffler M, Pfreundschuh M, Schmitz N. High-dose therapy followed by autologous stem-cell transplantation with and without rituximab for primary treatment of high-risk diffuse large B-cell lymphoma. Ann Oncol 2010; 21:2255-2261. [DOI: 10.1093/annonc/mdq235] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Goetz M, Schult C, Dahlhaus M, Fischer K, Freund M, Junghanss C. 168 MiR-155 expression in acute leukemia cells treated with the multikinase inhibitor sorafenib. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)71873-5] [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: 10/18/2022] Open
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Hilgendorf I, Wolff D, Gromke T, Trenschel R, Elmaagacli AH, Pichlmeier U, Junghanss C, Freund M, Beelen DW, Casper J. Retrospective analysis of treosulfan-based conditioning in comparison with standard conditioning in patients with myelodysplastic syndrome. Bone Marrow Transplant 2010; 46:502-9. [DOI: 10.1038/bmt.2010.153] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Hilbe W, Pall G, Schmid T, Forstner B, Zabernigg A, Jamnig H, Gaechter A, Freund M, Kendler D, Woell E. Multicenter phase II study evaluating docetaxel, CDDP, and cetuximab as induction regimen prior to surgery in chemotherapy-naive patients with NSCLC stage IB-IIIA (INN06-study): Preliminary results. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.7062] [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: 11/20/2022] Open
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Margreiter C, Mark W, Wiedemann D, Sucher R, Öllinger R, Bösmüller C, Freund M, Maier HT, Greiner A, Fritsch H, Pratschke J, Margreiter R, Aigner F. Pancreatic graft survival despite partial vascular graft thrombosis due to splenocephalic anastomoses. Am J Transplant 2010; 10:846-851. [PMID: 20420640 DOI: 10.1111/j.1600-6143.2010.03060.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Thrombotic complications following pancreas transplantation are still the most common cause of nonimmunologic graft loss. The aim of this study was to analyze pancreatic graft function after partial arterial graft thrombosis and the investigation of the pancreatic arterial anatomy with regard to intraparenchymal anastomoses. We retrospectively analyzed the data for 175 consecutive pancreas transplants performed between January 2002 and October 2007. Selective Y-graft angiography was performed in 10 and rubber-milk injection in 5 fresh pancreas specimens. Thrombosis of one leg of the Y-graft was diagnosed in 18 (10.3%) patients. Only one of these patients with thrombosis of the splenic artery required exogenous insulin. Sufficient graft perfusion was demonstrated in all of the remaining grafts. One graft was lost due to acute rejection. In all specimens angiography showed an excellent perfusion of the pancreaticoduodenal arcade, even after selective cannulation of the splenic artery. Arterial collaterals between the gastroduodenal, splenic artery and the superior mesenteric artery were demonstrated. Our results demonstrate that global perfusion of the pancreatic graft and sufficient graft function is sustained after the thrombotic occlusion of one branch of the Y-graft by a complex system of intraparenchymal anastomoses. These anatomical findings may have consequences for resection strategies in pancreas surgery.
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Affiliation(s)
- C Margreiter
- Department of Visceral, Transplant and Thoracic Surgery
| | - W Mark
- Department of Visceral, Transplant and Thoracic Surgery
| | | | - R Sucher
- Department of Visceral, Transplant and Thoracic Surgery
| | - R Öllinger
- Department of Visceral, Transplant and Thoracic Surgery
| | - C Bösmüller
- Department of Visceral, Transplant and Thoracic Surgery
| | - M Freund
- Department of Diagnostic Radiology
| | - H T Maier
- Department of Visceral, Transplant and Thoracic Surgery
| | | | - H Fritsch
- Department of Anatomy, Histology and Embryology, Division of Clinical and Functional Anatomy, Innsbruck Medical University, Innsbruck, Austria
| | - J Pratschke
- Department of Visceral, Transplant and Thoracic Surgery
| | - R Margreiter
- Department of Visceral, Transplant and Thoracic Surgery
| | - F Aigner
- Department of Visceral, Transplant and Thoracic Surgery
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Selder J, Algra S, Evens F, Freund M, Strengers J, Schouten T, Haas F. Minimizing circulatory arrest by using antegrade cerebral perfusion for aortic arch reconstruction in infants causes fewer postoperative adverse events. Thorac Cardiovasc Surg 2010; 58:17-22. [PMID: 20072971 DOI: 10.1055/s-0029-1186242] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND Because deep hypothermic circulatory arrest (DHCA) carries a risk for neurological damage, antegrade cerebral perfusion (ACP) is used increasingly for aortic arch surgery in infants. We assessed the short-term effects of minimal DHCA (< 30 minutes) versus prolonged DHCA (> 30 minutes) during biventricular aortic arch reconstruction. METHODS Twenty-six infants (< 3 months of age) who had undergone aortic arch reconstruction were retrospectively analyzed: 15 infants without DHCA (group A) and 11 infants with DHCA (group B). Group B was further divided into < 30 minutes DHCA (group B1, n = 6), and >or= 30 minutes DHCA (group B2, n = 5). Additionally, minimal DHCA (group A + B1) was compared to prolonged DHCA (group B2). RESULTS In the minimal DHCA group (A + B1), 29 % of the patients had a postoperative adverse event, compared to 80 % in the prolonged DHCA group (B2) ( P < 0.05). Average length of stay in hospital was 25 days shorter for the minimal DHCA group (15 days versus 40 days, P < 0.01). CONCLUSION Minimal DHCA results in fewer adverse events and a reduced length of stay, compared with prolonged DHCA. Therefore, during aortic arch surgery in infants, DHCA should be minimized by using antegrade cerebral perfusion.
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Affiliation(s)
- J Selder
- Cardio Thoracic Surgery, University Medical Center Utrecht, Utrecht, Netherlands.
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Hechler B, Nonne C, Eckly A, Magnenat S, Rinckel JY, Denis CV, Freund M, Cazenave JP, Lanza F, Gachet C. Arterial thrombosis: relevance of a model with two levels of severity assessed by histologic, ultrastructural and functional characterization. J Thromb Haemost 2010; 8:173-84. [PMID: 19874458 DOI: 10.1111/j.1538-7836.2009.03666.x] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [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: 11/27/2022]
Abstract
BACKGROUND We previously described a model of laser-induced thrombosis in mesenteric arterioles with superficial and deep levels of injury producing a transient thrombus resolving within 2 min and a larger almost occlusive thrombus, respectively. Both types of lesion were sensitive to platelet GPIIb-IIIa and P2Y(12) inhibition, whereas only deep injuries were sensitive to thrombin blockade. OBJECTIVE The aim of the present study was to use histologic methods and electron and intravital microscopy to characterize the lesions and thrombi and to extend our knowledge of the sensitivity of this model to genetic and pharmacologic inhibition. RESULTS A superficial injury was found to detach the endothelial cells and expose a collagen III- and IV-rich subendothelium where platelets could adhere. Tissue factor and fibrin were not detected. Deeper penetration of the external elastic lamina occurred in deep injuries, with exposure of collagen I, III and IV. Here the thrombus was composed of platelets exhibiting a decreasing gradient of degranulation from the deepest lesion area to the surface. Fibrin was found close to the most activated platelets. Consistently, glycoprotein VI (GPVI)-collagen and GPIb-von Willebrand factor (VWF) interactions were found to be critical in superficial injuries. After deep lesion, thrombus formation was modestly reduced in GPVI-immunodepleted mice and still strongly inhibited in VWF(-/-) mice. Combined hirudin infusion and GPVI depletion further inhibited thrombosis after deep injury. CONCLUSIONS This study confirms the feasibility of inducing arterial thrombosis with distinct levels of severity and establishes the central roles of collagen and VWF in thrombus formation after superficial injury. Collagen, VWF and thrombin all appear to contribute to thrombosis after deep arterial lesion.
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Affiliation(s)
- B Hechler
- UMR S949 INSERM, Université de Strasbourg, Etablissement Français du Sang-Alsace, Strasbourg, France
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Leithauser M, Kahl C, Aepinus C, Prall F, Maruschke M, Riemer H, Wolff D, Jost K, Hilgendorf I, Freund M, Junghanss C. Invasive zygomycosis in patients with graft-versus-host disease after allogeneic stem cell transplantation. Transpl Infect Dis 2009; 12:251-7. [PMID: 20002357 DOI: 10.1111/j.1399-3062.2009.00480.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M Leithauser
- Department of Medicine, Division of Hematology/Oncology, University of Rostock, Rostock, Germany.
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Freund M. [Therapy optimization studies torn between science and funding]. Z Rheumatol 2009; 61 Suppl 2:II/17-25. [PMID: 12491118 DOI: 10.1007/s00393-002-1205-9] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
There is no doubt that clinical studies are valuable cornerstones in the development of rational diagnostics and therapy, for the patients' safety, for quality assurance as well as for the development of a body of evidence in medicine. Well recognized multicentric study groups are active in several medical disciplines in Germany. Public funding resources however are miserable as compared to other countries. For example in hematology and oncology funds are almost exclusively available by private foundations as the Deutsche Krebshilfe only. Additionally physicians and institutions who are actively promoting clinical studies have to pay charges for patients' insurance and for registration of studies by the authorities. Furthermore there are increasing difficulties obtaining reimbursement for patients' care in clinical studies. In this context outdated regulations of the German Sozialgesetzbuch V lawbook play an important role. In summary a pronounced reform deficit paired with bureocratic tendencies has become manifested. The most important demands are in this situation: a reliable and realistic regulatory basis for treatment-related clinical studies has to be created. Studies on treatment strategies with registered drugs have to be free from the obligatory patients' insurance which is required for study with non-registered drugs. It has to be clarified that in these studies some regulations of good clinical practice as obligatory external monitoring and source data verification are not feasible and will not be required. The Sozialgesetzbuch V has to be adapted and the actual ban of clinical studies in private practice has to be ended. Treatment related clinical studies have to be free from charges of ethical committees and regulatory authorities. Thereby the financial overload of clinical studies could be reduced and some motivation for further bureocratic proliferation is removed. Finally a longterm, reliable funding resource has to be created independently from the pharmaceutical industry. A possible model could be a foundation for treatment-related studies which is financed by public funds and by funds from the reimbursement companies.
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Affiliation(s)
- M Freund
- Abteilung Hämatologie und Onkologie, Klinik und Poliklinik für Innere Medizin, Universität Rostock, Ernst-Heydemann-Str. 6, 18055 Rostock, Germany.
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Andriamampandry MD, Leray C, Gutbier G, Freund M, Cassel D, Cazenave JP, Gachet C. Diets rich in saturated n-9 and n-3 fatty acids differentially affect the fatty acid composition of phospholipids and function of rat platelets. Platelets 2009; 7:269-76. [DOI: 10.3109/09537109609023588] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Leray C, Freund M, Wiesel ML, Gutbier G, Cazenave JP, Gachet C. Effects of clopidogrel and its inactive form, SR 25989, on plasma, liver and platelet lipids in the rat. Platelets 2009; 9:49-54. [PMID: 16793745 DOI: 10.1080/09537109877004] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
The aim of the present study was to determine whether clopidogrel, one of the most potent antiplatelet compounds in vivo, could alter the lipid composition of plasma, liver tissue or platelet membranes in the rat. Animals treated (10 mg/kg per day for 7 days) with clopidogrel and its inactive analogue (R form, SR 25989) were compared with control animals. Neither compound altered plasma concentrations of triglycerides or free and esterified cholesterol, and no changes were observed in liver lipids. Clopidogrel treatment significantly lowered platelet cholesterol content and cholesterol to phospholipid ratio, while SR 25989 had comparatively smaller effects. Concerning platelet phospholipids, clopidogrel treatment reduced phosphatidylcholine(PC) but increased sphingomyelin (SP) content, whereas SR 25989 lowered PC and phosphatidylserine (PS) but raised phosphatidylethanolamine (PE) content. A significant increase in the arachidonic acid content of PE was observed only in the SR 25989 group. Clopidogrel and SR 25989 both induced an increase in the unsaturation level of platelet PC, accompanied by a decrease in the level of unsaturation in platelet SP, while a similar decrease was observed for phosphatidylinositol only in the clopidogrel group. These changes in platelet membrane composition in the clopidogrel group are probably unrelated to the antiaggregating properties of the drug, but could influence other platelet functions under long-term treatment.
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Affiliation(s)
- C Leray
- INSERM U.311, Biologie et pharmacologie des interactions dusang avec les vaisseaux et les biomatériaux, Etablissement de Transfusion Sanguine, 10 rue Spielmann, B. P. 36, 67065 Strasbourg Cédex, France
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Bauer E, Danhauser-Riedl S, De Riese W, Raab HR, Sandner S, Meyer HJ, Neukam D, Hanauske U, Freund M, Poliwoda H, Rastetter J, Hanauske AR. Effects of Recombinant Human Erythropoietin on Clonogenic Growth of Primary Human Tumor Specimens in vitro. Oncol Res Treat 2009. [DOI: 10.1159/000217366] [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: 11/19/2022]
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Hanauske AR, De Riese W, Joraschkewitz M, Freund M, Poliwoda H. Effects of Cytokines on Clonogenic Growth of Primary Renal Cancer Cells: An in vitro Phase II Study. Oncol Res Treat 2009. [DOI: 10.1159/000217348] [Citation(s) in RCA: 3] [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: 11/19/2022]
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Steinke B, Manegold C, Freund M, Reinold HM, Fischer JT, Arnold H, Lengfelder E, Lutz M, Zwingers T, Münz A, Hecht T. G-CSF for Treatment Intensification in High-Grade Malignant Non-Hodgkin’s Lymphomas. Oncol Res Treat 2009. [DOI: 10.1159/000217332] [Citation(s) in RCA: 3] [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: 11/19/2022]
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Maschek H, Georgii A, Kaloutsi V, Werner M, Bandecar K, Kressel MG, Choritz H, Freund M, Hufnagl D. Myelofibrosis in primary myelodysplasic syndromes. Eur J Haematol 2009. [DOI: 10.1111/j.1600-0609.1992.tb01587.x] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Brunner J, Freund M, Prelog M, Binder E, Sailer-Hoeck M, Jungraithmayr T, Huemer C, Sergi C, Zimmerhackl LB. Successful treatment of severe juvenile microscopic polyangiitis with rituximab. Clin Rheumatol 2009; 28:997-9. [PMID: 19390907 DOI: 10.1007/s10067-009-1177-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2009] [Accepted: 03/27/2009] [Indexed: 01/19/2023]
Abstract
Microscopic polyangiitis (MPA) previously called hypersensitivity angiitis is a systemic necrotizing vasculitis affecting predominantly small vessels. MPA involves multiple organ systems including the lung, the kidneys, the joints, and the skin. MPA mostly affects adults in their fourth and fifth decade of life. MPA and Wegener;s granulomatosis are grouped together as ANCA-associated vasculitis. MPA is associated with high titre of myeloperoxidase antineutrophil cytoplasmic antibodies (MPO)-ANCA. We present a 14-year-old female patient presented with MPA. She was treated with steroids and cyclophosphamide. After the complication of severe lung involvement, rituximab was administered as immune-modulating treatment. The MPA came to remission. This is the first report of a pediatric patient with MPA treated with rituximab. Rituximab might be a potential therapeutic option for relapsing ANCA associated vasculitis in childhood.
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Affiliation(s)
- J Brunner
- Department of Paediatrics, Innsbruck Medical University, Anichstrasse 35, Innsbruck 6020, Austria.
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Böckle BC, Willeit J, Freund M, Sepp NT. Neurological picture. Unexplained muscle atrophy as the unique preceding symptom of bilateral linear morphea. J Neurol Neurosurg Psychiatry 2009; 80:310-1. [PMID: 19228672 DOI: 10.1136/jnnp.2008.153734] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- B C Böckle
- Department of Dermatology, Innsbruck Medical University, Anichstrasse 35, 6020 Innsbruck, Austria.
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Kahl C, Leithäuser M, Junghanss C, Prall F, Freund M. [Pancytopenia and lymph node swelling. Cardinal symptoms of an unusual differential diagnosis]. Internist (Berl) 2009; 50:734-9. [PMID: 19214464 DOI: 10.1007/s00108-008-2279-5] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
A 47-year-old woman was admitted to our emergency room because of anemia and acute tonsillitis. She reported recurrent fever and a sore throat. Clinical examination and CT scans showed general lymph node swelling and liver enlargement. In the course of the disease she developed pancytopenia with neutropenic fever, pleuropneumonia, and deep vein thrombosis. The histological examination of a lymph node showed a reactive, EBV-associated lymphadenitis. The examination of the bone marrow showed an activated marrow. The diagnosis of an active EBV infection was established with 2 x 10(6)/ml EBV gene copies in the blood. In addition, systemic lupus erythematosus was diagnosed because of the typical autoantibody constellation and clinical findings. The immunohematological examination showed autoantibodies against the three blood cell compartments. Because of the severe pancytopenia as a result of the EBV- and SLE-associated autoantibodies and despite recurrent infections, we initiated immunosuppressive therapy with low-dose corticosteroids. This therapy resulted in normalization of the blood counts. Anitibody levels and the EBV genome levels became negative.
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Affiliation(s)
- C Kahl
- Abteilung Hämatologie und Onkologie, Klinik und Poliklinik für Innere Medizin, Ernst-Heydemann-Strasse 6, 18055 Rostock.
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Brunner J, Freund M, Prelog M, Binder E, Sailer-Höck M, Jungraithmayr T, Mayer G, Zimmerhackl LB. Rituximab is a therapeutical option for juvenile microscopic polyangiitis. Pediatr Rheumatol Online J 2008; 6. [PMCID: PMC3334076 DOI: 10.1186/1546-0096-6-s1-p268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- J Brunner
- Department of Pediatrics, Innsbruck Medical University, Innsbruck, Austria
| | - M Freund
- Department of Radiology, Innsbruck Medical University, Innsbruck, Austria
| | - M Prelog
- Department of Pediatrics, Innsbruck Medical University, Innsbruck, Austria
| | - E Binder
- Department of Pediatrics, Innsbruck Medical University, Innsbruck, Austria
| | - M Sailer-Höck
- Department of Pediatrics, Innsbruck Medical University, Innsbruck, Austria
| | - T Jungraithmayr
- Department of Pediatrics, Innsbruck Medical University, Innsbruck, Austria
| | - G Mayer
- Department of Nephrology, Innsbruck Medical University, Innsbruck, Austria
| | - LB Zimmerhackl
- Department of Pediatrics, Innsbruck Medical University, Innsbruck, Austria
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Freund M, Stoutenbeek P, ter Heide H, Pistorius L. 'Tobacco pipe' sign in the fetus: patent left superior vena cava with absent right superior vena cava. Ultrasound Obstet Gynecol 2008; 32:593-594. [PMID: 18690613 DOI: 10.1002/uog.5392] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
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