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Timmins J, van Wyk N, Kroukamp H, Walker R, Fritsch S, Rauhut D, Wallbrunn C, Pretorius I, Paulsen I. Engineering a fermenting yeast able to produce the fragrant β-ionone apocarotenoid for enhanced aroma properties in wine. FEMS Yeast Res 2023; 23:7008492. [PMID: 36708173 DOI: 10.1093/femsyr/foad001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 12/14/2022] [Accepted: 01/25/2023] [Indexed: 01/29/2023] Open
Abstract
Wine is composed of multitudinous flavour components and volatile organic compounds that provide this beverage with its attractive properties of taste and aroma. The perceived quality of a wine can be attributed to the absolute and relative concentrations of favourable aroma compounds; hence, increasing the detectable levels of an attractive aroma, such as β-ionone with its violet and berry notes, can improve the organoleptic qualities of given wine styles. We here describe the generation of a new grape-must fermenting strain of Saccharomyces cerevisiae that is capable of releasing β-ionone through the heterologous expression of both the enzyme carotenoid cleavage dioxygenase 1 (CCD1) and its substrate, β-carotene. Haploid laboratory strains of S. cerevisiae were constructed with and without integrated carotenogenic genes and transformed with a plasmid containing the genes of CCD1. These strains were then mated with a sporulated diploid wine industry yeast, VIN13, and four resultant crosses-designated MQ01-MQ04-which were capable of fermenting the must to dryness were compared for their ability to release β-ionone. Analyses of their fermentation products showed that the MQ01 strain produced a high level of β-ionone and offers a fermenting hybrid yeast with the potential to enhance the organoleptic qualities of wine.
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Affiliation(s)
- John Timmins
- ARC Centre of Excellence in Synthetic Biology, School of Natural Sciences, Macquarie University, 6 Wallys Way, Macquarie University, Macquarie Park, NSW 2109, Australia
| | - Niel van Wyk
- ARC Centre of Excellence in Synthetic Biology, School of Natural Sciences, Macquarie University, 6 Wallys Way, Macquarie University, Macquarie Park, NSW 2109, Australia.,Institut für Mikrobiologie und Biochemie, Hochschule Geisenheim University, von-Lade-Str. 1, D-65366 Geisenheim, Germany
| | - Heinrich Kroukamp
- ARC Centre of Excellence in Synthetic Biology, School of Natural Sciences, Macquarie University, 6 Wallys Way, Macquarie University, Macquarie Park, NSW 2109, Australia
| | - Roy Walker
- ARC Centre of Excellence in Synthetic Biology, School of Natural Sciences, Macquarie University, 6 Wallys Way, Macquarie University, Macquarie Park, NSW 2109, Australia
| | - S Fritsch
- Institut für Mikrobiologie und Biochemie, Hochschule Geisenheim University, von-Lade-Str. 1, D-65366 Geisenheim, Germany
| | - Doris Rauhut
- Institut für Mikrobiologie und Biochemie, Hochschule Geisenheim University, von-Lade-Str. 1, D-65366 Geisenheim, Germany
| | - Christian Wallbrunn
- Institut für Mikrobiologie und Biochemie, Hochschule Geisenheim University, von-Lade-Str. 1, D-65366 Geisenheim, Germany
| | - Isak Pretorius
- ARC Centre of Excellence in Synthetic Biology, School of Natural Sciences, Macquarie University, 6 Wallys Way, Macquarie University, Macquarie Park, NSW 2109, Australia
| | - Ian Paulsen
- ARC Centre of Excellence in Synthetic Biology, School of Natural Sciences, Macquarie University, 6 Wallys Way, Macquarie University, Macquarie Park, NSW 2109, Australia
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Gardoni E, Benito S, Scansani S, Brezina S, Fritsch S, Rauhut D. Biological Deacidification Strategies for White Wines. S AFR J ENOL VITIC 2021. [DOI: 10.21548/42-2-4474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Traditionally, the use of malolactic fermentation gives rise to microbiologically stable wines. However, malolactic fermentation is not free from possible collateral effects that can take place under specific scenarios. The present work tests the influence of different biological deacidification strategies on the volatile and non-volatile components of white must from Germany. The study compared mixed cultures of Lachancea thermotolerans and Schizosaccharomyces pombe and a pure culture of Sc. pombe to the classical biological deacidification process performed by lactic acid bacteria. Strains of Oenococcus oeni and Lactiplantibacillus plantarum were co- or sequentially inoculated with S. cerevisiae to carry out malolactic fermentation. Different fermentation treatments took place at a laboratory scale of 0.6 L in vessels of 0.75 L. The instrumental techniques Fourier-transform mid-infrared spectroscopy (FT-MIR), high performance liquid chromatography (HPLC) and gas chromatography–mass spectrometry (GC-MS) were used to evaluate different chemical parameters in the final wines. The results showed the ability of Sc. pombe to consume malic acid in combination with L. thermotolerans without using S. cerevisiae or lactic acid bacteria. Fermentations involving Sc. pombe consumed all the malic acid, although they reduced the concentrations of higher alcohols, fatty acids and acetic acid. Simultaneous alcoholic and malolactic fermentations reduced malic acid by about 80%, while classical malolactic fermentation reduced it by 100%. Fermentations involving L. thermotolerans produced the highest lactic acid, ester and glycerol concentrations.
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Philipp JK, Fritsch S, Ludwig R. Front Cover: Cyclic Octamer of Hydroxyl‐functionalized Cations with Net Charge
Q
=+8
e
Kinetically Stabilized by a ‘Molecular Island’ of Cooperative Hydrogen Bonds (ChemPhysChem 21/2020). Chemphyschem 2020. [DOI: 10.1002/cphc.202000842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- J. K. Philipp
- Universität Rostock Institut für Chemie Abteilung Physikalische und Theoretische Chemie Dr.-Lorenz-Weg 2 18059 Rostock Germany
| | - S. Fritsch
- Universität Rostock Institut für Chemie Abteilung Physikalische und Theoretische Chemie Dr.-Lorenz-Weg 2 18059 Rostock Germany
| | - R. Ludwig
- Universität Rostock Institut für Chemie Abteilung Physikalische und Theoretische Chemie Dr.-Lorenz-Weg 2 18059 Rostock Germany
- Universität Rostock Department LL&M Albert-Einstein-Str. 25 18059 Rostock Germany
- Leibniz-Institut für Katalyse an der Universität Rostock e.V. Albert-Einstein-Str. 29a 18059 Rostock Germany
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Philipp JK, Fritsch S, Ludwig R. Cyclic Octamer of Hydroxyl‐functionalized Cations with Net Charge
Q
=+8
e
Kinetically Stabilized by a ‘Molecular Island’ of Cooperative Hydrogen Bonds. Chemphyschem 2020; 21:2367. [DOI: 10.1002/cphc.202000841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- J. K. Philipp
- Universität Rostock Institut für Chemie Abteilung Physikalische und Theoretische Chemie Dr.-Lorenz-Weg 2 18059 Rostock Germany
| | - S. Fritsch
- Universität Rostock Institut für Chemie Abteilung Physikalische und Theoretische Chemie Dr.-Lorenz-Weg 2 18059 Rostock Germany
| | - R. Ludwig
- Universität Rostock Institut für Chemie Abteilung Physikalische und Theoretische Chemie Dr.-Lorenz-Weg 2 18059 Rostock Germany
- Universität Rostock Department LL&M Albert-Einstein-Str. 25 18059 Rostock Germany
- Leibniz-Institut für Katalyse an der Universität Rostock e.V. Albert-Einstein-Str. 29a 18059 Rostock Germany
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Bickenbach J, Czaplik M, Fritsch S, Cornellissen CG, Dreher M. EIT zur Optimierung des Spontanatemversuches im prolongierten Weaning. Pneumologie 2017. [DOI: 10.1055/s-0037-1598432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- J Bickenbach
- Klinik für Operative Intensivmedizin und Intermediate Care, Uniklinik RWTH Aachen
| | - M Czaplik
- Klinik für Anästhesiologie, Uniklinik RWTH Aachen
| | - S Fritsch
- Klinik für Operative Intensivmedizin und Intermediate Care
| | - CG Cornellissen
- Klinik für Kardiologie, Pneumologie, Angiologie und Internistische Intensivmedizin, Uniklinik RWTH Aachen
| | - M Dreher
- Klinik für Kardiologie, Pneumologie, Angiologie und Internistische Intensivmedizin, Uniklinik RWTH Aachen
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Zoellner AK, Fritsch S, Prevalsek D, Engel N, Hubmann M, Reibke R, Rieger CT, Hellmuth JC, Haas M, Mumm F, Herold T, Ledderose G, Hiddemann W, Dreyling M, Hausmann A, Tischer J. Sequential therapy combining clofarabine and T-cell-replete HLA-haploidentical haematopoietic SCT is feasible and shows efficacy in the treatment of refractory or relapsed aggressive lymphoma. Bone Marrow Transplant 2015; 50:679-84. [PMID: 25642765 DOI: 10.1038/bmt.2014.328] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 12/04/2014] [Accepted: 12/17/2014] [Indexed: 01/25/2023]
Abstract
Prognosis is poor for patients with biologically aggressive Non-Hodgkin lymphoma (NHL), refractory to chemotherapy or relapsed after autologous transplantation, especially when no disease control before allogeneic transplantation is achieved. In 16 patients (median age 53, median prior regimes 5) with relapsed or refractory non-remission NHL, we analysed retrospectively the efficacy of a sequential therapy comprising clofarabine re-induction followed by a reduced-intensity conditioning with fludarabine, CY and melphalan, and T-cell-replete HLA-haploidentical transplantation. High-dose CY was utilized post-transplantation. All patients engrafted. Early response (day +30) was achieved in 94%. Treatment-related grade III-IV toxicity occurred in 56%, most commonly transient elevation of transaminases (36%), while there was a low incidence of infections (19% CMV reactivation, 19% invasive fungal infection) and GVHD (GVHD: acute III-IV: 6%; mild chronic: 25%). One-year non-relapse mortality was 19%. After a median follow-up of 21 months, estimated 1- and 2-year PFS was 56 and 50%, respectively, with 11 patients (69%) still alive after 2 years. In summary, sequential therapy is feasible and effective and provides an acceptable toxicity profile in high-risk non-remission NHL. Presumably, cytotoxic reinduction with clofarabine provides enough remission time for the graft-versus lymphoma effect of HLA-haploidentical transplantation to kick in, even in lymphomas that are otherwise chemo-refractory.
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Affiliation(s)
- A-K Zoellner
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - S Fritsch
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - D Prevalsek
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - N Engel
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - M Hubmann
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - R Reibke
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - C T Rieger
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - J C Hellmuth
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - M Haas
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - F Mumm
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - T Herold
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - G Ledderose
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - W Hiddemann
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - M Dreyling
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - A Hausmann
- 1] Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany [2] Department I of Internal Medicine, Klinikum München-Schwabing, Munich, Germany
| | - J Tischer
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
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Hanoun N, Fritsch S, Gayet O, Gigoux V, Cordelier P, Dusetti N, Torrisani J, Dufresne M. The E3 ubiquitin ligase thyroid hormone receptor-interacting protein 12 targets pancreas transcription factor 1a for proteasomal degradation. J Biol Chem 2014; 289:35593-604. [PMID: 25355311 DOI: 10.1074/jbc.m114.620104] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Pancreas transcription factor 1a (PTF1a) plays a crucial role in the early development of the pancreas and in the maintenance of the acinar cell phenotype. Several transcriptional mechanisms regulating expression of PTF1a have been identified. However, regulation of PTF1a protein stability and degradation is still unexplored. Here, we report that inhibition of proteasome leads to elevated levels of PTF1a and to the existence of polyubiquitinated forms of PTF1a. We used the Sos recruitment system, an alternative two-hybrid system method to detect protein-protein interactions in the cytoplasm and to map the interactome of PTF1a. We identified TRIP12 (thyroid hormone receptor-interacting protein 12), an E3 ubiquitin-protein ligase as a new partner of PTF1a. We confirmed PTF1a/TRIP12 interaction in acinar cell lines and in co-transfected HEK-293T cells. The protein stability of PTF1a is significantly increased upon decreased expression of TRIP12. It is reduced upon overexpression of TRIP12 but not a catalytically inactive TRIP12-C1959A mutant. We identified a region of TRIP12 required for interaction and identified lysine 312 of PTF1a as essential for proteasomal degradation. We also demonstrate that TRIP12 down-regulates PTF1a transcriptional and antiproliferative activities. Our data suggest that an increase in TRIP12 expression can play a part in PTF1a down-regulation and indicate that PTF1a/TRIP12 functional interaction may regulate pancreatic epithelial cell homeostasis.
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Affiliation(s)
- Naïma Hanoun
- From the INSERM UMR1037, Cancer Research Center of Toulouse (CRCT), University of Toulouse III Paul Sabatier, 31037 Toulouse, France
| | - Samuel Fritsch
- From the INSERM UMR1037, Cancer Research Center of Toulouse (CRCT), University of Toulouse III Paul Sabatier, 31037 Toulouse, France
| | - Odile Gayet
- the Cancer Research Center of Marseille, INSERM UMR1068, Paoli-Calmettes Institute, University of Aix-Marseille, CNRS UMR7258, 13273 Marseille, France
| | - Véronique Gigoux
- EA 4552, University of Toulouse III Paul Sabatier, 31432 Toulouse, France, and
| | - Pierre Cordelier
- From the INSERM UMR1037, Cancer Research Center of Toulouse (CRCT), University of Toulouse III Paul Sabatier, 31037 Toulouse, France
| | - Nelson Dusetti
- the Cancer Research Center of Marseille, INSERM UMR1068, Paoli-Calmettes Institute, University of Aix-Marseille, CNRS UMR7258, 13273 Marseille, France
| | - Jérôme Torrisani
- From the INSERM UMR1037, Cancer Research Center of Toulouse (CRCT), University of Toulouse III Paul Sabatier, 31037 Toulouse, France
| | - Marlène Dufresne
- From the INSERM UMR1037, Cancer Research Center of Toulouse (CRCT), University of Toulouse III Paul Sabatier, 31037 Toulouse, France,
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Windyga J, Lissitchkov T, Stasyshyn O, Mamonov V, Ghandehari H, Chapman M, Fritsch S, Wong WY, Pavlova BG, Abbuehl BE. Efficacy and safety of a recombinant factor IX (Bax326) in previously treated patients with severe or moderately severe haemophilia B undergoing surgical or other invasive procedures: a prospective, open-label, uncontrolled, multicentre, phase III study. Haemophilia 2014; 20:651-8. [PMID: 24697870 DOI: 10.1111/hae.12419] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/15/2014] [Indexed: 12/25/2022]
Abstract
Haemostatic management of haemophilia B patients undergoing surgery is critical to patient safety. The aim of this ongoing prospective trial was to investigate the haemostatic efficacy and safety of a recombinant factor IX (rFIX) (Bax326) in previously treated subjects (12-65 years, without history of FIX inhibitors) with severe or moderately severe haemophilia B, undergoing surgical, dental or other invasive procedures. Haemostatic efficacy was assessed according to a predefined scale. Blood loss was compared to the average and maximum blood loss predicted preoperatively. Haemostatic FIX levels were achieved peri- and postoperatively in 100% of subjects (n = 14). Haemostasis was 'excellent' intraoperatively in all patients and postoperatively in those without a drain, and 'excellent' or 'good' at the time of drain removal and day of discharge in those with a drain employed. Following the initial dose, the mean FIX activity level rose from 6.55% to 107.58% for major surgeries and from 3.60% to 81.4% for minor surgeries. Actual vs. predicted blood loss matched predicted intraoperative blood loss but was equal to or higher than (but less than 150%) the maximum predicted postoperative blood loss reflecting the severity of procedure and FIX requirements. There were no related adverse events, severe allergic reactions or thrombotic events. There was no evidence that BAX326 increased the risk of inhibitor or binding antibody development to FIX. BAX326 was safe and effective for peri-operative management of 14 subjects with severe and moderately severe haemophilia B.
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Affiliation(s)
- J Windyga
- Institute of Hematology and Transfusion Medicine, Warsaw, Poland
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9
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Junge S, Dittrich AM, Dopfer C, Sauer-Heilborn A, Berger C, Fritsch S, Hansen G, Welte T, Tümmler B. Die Mukoviszidose Transitionsambulanz an der Medizinischen Hochschule Hannover. Pneumologie 2014. [DOI: 10.1055/s-0034-1368030] [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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Windyga J, Lissitchkov T, Stasyshyn O, Mamonov V, Rusen L, Lamas JL, Oh MS, Chapman M, Fritsch S, Pavlova BG, Wong WY, Abbuehl BE. Pharmacokinetics, efficacy and safety of BAX326, a novel recombinant factor IX: a prospective, controlled, multicentre phase I/III study in previously treated patients with severe (FIX level <1%) or moderately severe (FIX level ≤2%) haemophilia B. Haemophilia 2013; 20:15-24. [DOI: 10.1111/hae.12228] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/14/2013] [Indexed: 12/31/2022]
Affiliation(s)
- J. Windyga
- Institute of Hematology and Transfusion Medicine; Warsaw Poland
| | - T. Lissitchkov
- Specialized Hematological Hospital “Joan Pavel”; Sofia Bulgaria
| | - O. Stasyshyn
- State Institution “Institute of Blood Pathology and Transfusion Medicine of the Academy of Medical Sciences of Ukraine”; Lviv Ukraine
| | - V. Mamonov
- Hematological Research Center; Moscow Russia
| | - L. Rusen
- Prof. Dr. C. T. Nicolau National Institute for Transfusional Hematology; Bucharest Romania
| | | | - M.-S. Oh
- Global Clinical Research and Development; Baxter BioScience; Westlake Village CA USA
| | - M. Chapman
- Global Clinical Research and Development; Baxter BioScience; Vienna Austria
| | - S. Fritsch
- Global Clinical Research and Development; Baxter BioScience; Vienna Austria
| | - B. G. Pavlova
- Global Clinical Research and Development; Baxter BioScience; Vienna Austria
| | - W.-Y. Wong
- Global Clinical Research and Development; Baxter BioScience; Westlake Village CA USA
| | - B. E. Abbuehl
- Global Clinical Research and Development; Baxter BioScience; Vienna Austria
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Fritsch S, Poblete S, Junghans C, Ciccotti G, Delle Site L, Kremer K. Adaptive resolution molecular dynamics simulation through coupling to an internal particle reservoir. Phys Rev Lett 2012; 108:170602. [PMID: 22680848 DOI: 10.1103/physrevlett.108.170602] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Indexed: 05/04/2023]
Abstract
For simulation studies of (macro) molecular liquids it would be of significant interest to be able to adjust or increase the level of resolution within one region of space, while allowing for the free exchange of molecules between open regions of different resolution or representation. We generalize the adaptive resolution idea and suggest an interpretation in terms of an effective generalized grand canonical approach. The method is applied to liquid water at ambient conditions.
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Affiliation(s)
- S Fritsch
- Max Planck Institut für Polymerforschung, Ackermannweg 10, D-55128 Mainz, Germany
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Duclot F, Lapierre M, Fritsch S, White R, Parker MG, Maurice T, Cavaillès V. Cognitive impairments in adult mice with constitutive inactivation of RIP140 gene expression. Genes Brain Behav 2011; 11:69-78. [PMID: 21906262 DOI: 10.1111/j.1601-183x.2011.00731.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Receptor-interacting protein 140 (RIP140) is a negative transcriptional coregulator of nuclear receptors such as estrogen, retinoic acid or glucocorticoid receptors. Recruitment of RIP140 results in an inhibition of target gene expression through different repressive domains interacting with histone deacetylases or C-terminal binding proteins. In this study, we analyzed the role of RIP140 activity in memory processes using RIP140-deficient transgenic mice. Although the RIP140 protein was clearly expressed in the brain (cortical and hippocampus areas), the morphological examination of RIP140(-/-) mouse brain failed to show grossly observable alterations. Using male 2-month-old RIP140(-/-) , RIP140(+/-) or RIP140(+/+) mice, we did not observe any significant differences in the open-field test, rotarod test and in terms of spontaneous alternation in the Y-maze. By contrast, RIP140(-/-) mice showed long-term memory deficits, with an absence of decrease in escape latencies when animals were tested using a fixed platform position procedure in the water maze and in the passive avoidance test. Noteworthy, RIP140(-/-) mice showed decreased swimming speed, suggesting swimming alterations that may in part account for the marked alterations measured in the water maze. Moreover, RIP140(+/-) and RIP140(-/-) mice showed a significant increase in immobility time in the forced swimming test as compared with wild-type animals. These observations showed that RIP140 gene depletion results in learning and memory deficits as well as stress response, bringing to light a major role for this transcriptional coregulator in the neurophysiological developmental mechanisms underlying cognitive functions.
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Affiliation(s)
- F Duclot
- INSERM U710, Montpellier, France
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Fischer K, Collins P, Björkman S, Blanchette V, Oh M, Fritsch S, Schroth P, Spotts G, Ewenstein B. Trends in bleeding patterns during prophylaxis for severe haemophilia: observations from a series of prospective clinical trials. Haemophilia 2011; 17:433-8. [PMID: 21299740 DOI: 10.1111/j.1365-2516.2010.02450.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [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)
- K Fischer
- Van Creveldkliniek, Department of Hematology, and Julius Center for Health Sciences and Primary Care, University Medical Center, Utrecht, The Netherlands.
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Fritsch S, Gigoux V, Clerc P, Da Costa De Jesus C, Dusetti N, Dufresne M. R20: La surexpression de la protéine E3UL dès les étapes précoces de la carcinogenèse pancréatique induit la dégradation du facteur de transcription Ptf1a par le protéasome. Bull Cancer 2010. [DOI: 10.1016/s0007-4551(15)30937-1] [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: 11/16/2022]
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Fritsch S, Azambuja AP. Cryoglobulinemic leukocytoclastic vasculitis secondary to multiple myeloma. QJM 2010; 103:619-20. [PMID: 19793872 DOI: 10.1093/qjmed/hcp139] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- S Fritsch
- Department of Internal Medicine, Hospital de Clínicas, Universidade Federal do Paraná (UFPR), Brazil.
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Affiliation(s)
- S Fritsch
- Department of Internal Medicine, Hospital de Clínicas, Universidade Federal do Paraná, Brazil
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Docquier A, Harmand PO, Fritsch S, Chanrion M, Darbon JM, Cavaillès V. The transcriptional coregulator RIP140 represses E2F1 activity and discriminates breast cancer subtypes. Clin Cancer Res 2010; 16:2959-70. [PMID: 20410059 DOI: 10.1158/1078-0432.ccr-09-3153] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
PURPOSE Receptor-interacting protein of 140 kDa (RIP140) is a transcriptional cofactor for nuclear receptors involved in reproduction and energy homeostasis. Our aim was to investigate its role in the regulation of E2F1 activity and target genes both in breast cancer cell lines and in tumor biopsies. EXPERIMENTAL DESIGN Glutathione S-transferase pull-down assays, coimmunoprecipitation experiments, and chromatin immunoprecipitation analysis were used to evidence interaction between RIP140 and E2F1. The effects of RIP140 expression on E2F1 activity were determined using transient transfection and quantification of E2F target mRNAs by quantitative real-time PCR. The effect on cell cycle was assessed by fluorescence-activated cell sorting analysis on cells overexpressing green fluorescent protein-tagged RIP140. A tumor microarray data set was used to investigate the expression of RIP140 and E2F1 target genes in 170 breast cancer patients. RESULTS We first evidenced the complex interaction between RIP140 and E2F1 and showed that RIP140 represses E2F1 transactivation on various transiently transfected E2F target promoters and inhibits the expression of several E2F1 target genes (such as CCNE1 and CCNB2). In agreement with a role for RIP140 in the control of E2F activity, we show that increasing RIP140 levels results in a reduction in the proportion of cells in S phase in various human cell lines. Finally, analysis of human breast cancers shows that low RIP140 mRNA expression was associated with high E2F1 target gene levels and basal-like tumors. CONCLUSION This study shows that RIP140 is a regulator of the E2F pathway, which discriminates luminal- and basal-like tumors, emphasizing the importance of these regulations for a clinical cancer phenotype.
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Affiliation(s)
- Aurélie Docquier
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, France
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Docquier A, Harmand PO, Fritsch S, Badia E, Fajas L, Augereau P, Cavailles V. Abstract 4970: Complex regulation of RIP140 gene expression by E2F transcription factors. Cancer Res 2010. [DOI: 10.1158/1538-7445.am10-4970] [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: 11/16/2022]
Abstract
Abstract
We recently showed that RIP140 (Receptor Interacting protein of 140 kDa), a regulator of nuclear receptor activity, was involved in the control of cell proliferation and able to repress E2F1 activity. We now demonstrate that RIP140 and E2F1 comprise a novel transcriptional regulatory loop. We first observed that RIP140 mRNA levels increased during the G1/S and G2/M transitions and were reduced in tissues from E2F1 null mice. Furthermore, we identified the RIP140 gene as a transcriptional target of E2F1, showing, by transient transfection, that overexpression of E2F1/DP1 strongly increased transcription of the RIP140 promoter. Bioinformatic analysis identified several binding sites for E2Fs in the proximal promoter region and we evidenced the direct binding of E2F1/DP1 on these sequences by gel shift analysis. However, site directed mutagenesis of these elements only modestly affected transactivation of the RIP140 promoter by E2F1/DP1, thus suggesting an indirect recruitment of E2Fs on the promoter. This was strengthened by the observation that overexpression of E2F1, 2 or 3 alone was very potent in increasing transcription from the RIP140 promoter. Moreover, overexpression of DP1 produced a negative effect on this regulation which was also strongly repressed by RIP140 itself. Altogether, these results revealed a complex control loop between E2Fs and RIP140 and the molecular mechanisms underlying these atypical regulations are currently under investigation.
Note: This abstract was not presented at the AACR 101st Annual Meeting 2010 because the presenter was unable to attend.
Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 101st Annual Meeting of the American Association for Cancer Research; 2010 Apr 17-21; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2010;70(8 Suppl):Abstract nr 4970.
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Björkman S, Blanchette VS, Fischer K, Oh M, Spotts G, Schroth P, Fritsch S, Patrone L, Ewenstein BM, Collins PW. Comparative pharmacokinetics of plasma- and albumin-free recombinant factor VIII in children and adults: the influence of blood sampling schedule on observed age-related differences and implications for dose tailoring. J Thromb Haemost 2010; 8:730-6. [PMID: 20398185 PMCID: PMC2855866 DOI: 10.1111/j.1538-7836.2010.03757.x] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2009] [Accepted: 01/08/2010] [Indexed: 11/29/2022]
Abstract
BACKGROUND Dose tailoring of coagulation factors requires reliably estimated and reproducible pharmacokinetics (PK) in the individual patient. OBJECTIVES To investigate the contribution of both biological and methodological factors to the observed variability of factor VIII (FVIII) PK, with the focus on differences between children and adults, and to examine the implications for dosing. PATIENTS Data from 52 1-6-year-old and 100 10-65-year-old patients with hemophilia A (FVIII < or = 2 IU dL(-1)) in three clinical studies were included. RESULTS In vivo recovery was lower, weight-adjusted clearance was higher and FVIII half-life was on average shorter in children than in adults. However, a reduced blood sampling schedule for children was estimated to account for up to one half of the total observed differences. Intrapatient variance in PK was smaller than interpatient variance in 10-65-year-olds. Age and ratio of actual to ideal weight only showed weak relationships with PK parameters. Variance in PK caused large variance in the calculated dose required to maintain a target FVIII trough level during prophylactic treatment. CONCLUSION Differences in blood sampling schedules should be taken into account when results from different PK studies are compared. However, even with this consideration, PK cannot be predicted from observable patient characteristics but must be determined for the individual. Because the influence of reducing the blood sampling was minor in comparison to the true variance between patients, a reduced blood sampling protocol can be used. Low intrapatient variability supports the use of PK measurements for dose tailoring of FVIII.
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Affiliation(s)
- S Björkman
- Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden.
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Collins PW, Björkman S, Fischer K, Blanchette V, Oh M, Schroth P, Fritsch S, Casey K, Spotts G, Ewenstein BM. Factor VIII requirement to maintain a target plasma level in the prophylactic treatment of severe hemophilia A: influences of variance in pharmacokinetics and treatment regimens. J Thromb Haemost 2010; 8:269-75. [PMID: 19943875 DOI: 10.1111/j.1538-7836.2009.03703.x] [Citation(s) in RCA: 144] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Prophylactic factor (F)VIII has been shown to reduce bleeds and arthropathy in patients with severe hemophilia A. OBJECTIVES Assuming that the trough FVIII level is an important determinant of the efficacy of prophylaxis, this paper addresses the effect of the inter-patient variability in pharmacokinetics and different dosing regimens on trough levels. METHODS Simulations used FVIII half-lives and in vivo recoveries (IVR), observed during clinical trials with Advate [Antihemophilic Factor (Recombinant), Plasma/Albumin-Free Method], and commonly used prophylactic regimens to calculate their effect on FVIII levels during prophylaxis. RESULTS AND CONCLUSIONS Half-life and dose frequency had a larger effect on trough FVIII and time per week with FVIII<1 IU dL(-1) than IVR and infused dose per kg. The combined effect of these parameters resulted in substantial inter-patient variability in the amount of FVIII required to sustain a desired trough level. Prophylactic regimens based on Monday, Wednesday, Friday dosing were less cost effective in maintaining a desired trough level throughout the week. Dose escalation on Friday to cover the weekend would require potentially harmful doses of FVIII in many patients, especially in young children where more than 50% would require a Friday dose of over 100 IU kg(-1) and some would require more than 400 IU kg(-1). Knowledge of individual patients' half-lives and alteration of frequency of infusions may allow the more cost-effective use of FVIII and potentially expand access to prophylaxis to a greater number of patients, especially in regions where healthcare resources are scarce.
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Affiliation(s)
- P W Collins
- University Hospital of Wales, Arthur Bloom Hemophilia centre, Cardiff, Wales, UK.
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Björkman S, Blanchette VS, Fischer K, Oh M, Spotts G, Schroth P, Fritsch S, Patrone L, Ewenstein BM, Collins PW. Comparative pharmacokinetics of plasma- and albumin-free recombinant factor VIII in children and adults: the influence of blood sampling schedule on observed age-related differences and implications for dose tailoring. J Thromb Haemost 2010. [DOI: 10.1111/j.1538-7933.2010.03757.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hackenthal E, Münter K, Fritsch S. Role of Nitric Oxide in the Control of Renin Release from the Normal and Hydronephrotic Rat Kidney. ACTA ACUST UNITED AC 2009. [DOI: 10.3109/10623329409053380] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Collins PW, Blanchette VS, Fischer K, Björkman S, Oh M, Fritsch S, Schroth P, Spotts G, Astermark J, Ewenstein B. Break-through bleeding in relation to predicted factor VIII levels in patients receiving prophylactic treatment for severe hemophilia A. J Thromb Haemost 2009; 7:413-20. [PMID: 19143924 DOI: 10.1111/j.1538-7836.2008.03270.x] [Citation(s) in RCA: 254] [Impact Index Per Article: 16.9] [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: 11/26/2022]
Abstract
BACKGROUND The role of prophylactic factor VIII (FVIII) to decrease hemophilic bleeding and arthropathy is well established. The rationale for this strategy is to convert patients with severe hemophilia A to a moderate clinical phenotype by reducing time spent with a FVIII level <1 IU dL(-1). Studies to date, however, have not demonstrated a strong link between FVIII level and the bleeding rate. OBJECTIVES To assess the effect of FVIII level on break-through bleeding in patients with severe hemophilia A on prophylaxis. PATIENTS/METHODS This study analysed data from 44 patients aged 1-6 and 99 patients aged 10-65 years with severe hemophilia A (FVIII <1 IU dL(-1)) who were treated with prophylactic FVIII as part of clinical studies assessing pharmacokinetics, safety and efficacy of a recombinant FVIII (Advate). Each patient had pharmacokinetic measurements and FVIII infusions recorded, and these were used to calculate time spent with a FVIII below 1, 2 and 5 IU dL(-1). RESULTS The data demonstrate that increasing time with a FVIII below 1 IU dL(-1) is associated with increased total bleeds and hemarthroses. Lack of adherence to the intended frequency of FVIII infusion was the most important determinant of low FVIII and increased bleeding. In children aged 1-6 years, the rate of bleeding was also influenced by FVIII half-life and clearance. CONCLUSIONS These data have important implications for the management of patients with severe hemophilia.
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Affiliation(s)
- P W Collins
- Arthur Bloom Haemophilia Centre, Department of Haematology, Medical School of Cardiff University, University Hospital of Wales, Heath Park, Cardiff, UK.
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Cavailles V, Harmand P, Augereau P, Badia E, Docquier A, Ambit A, Chanrion M, Darbon J, Parker M, Fritsch S. The transcriptional repressor RIP140 is a cell-cycle regulated gene which controls E2F1 activity and cell proliferation. EJC Suppl 2008. [DOI: 10.1016/s1359-6349(08)71304-1] [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: 10/21/2022] Open
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Fritsch S. R. H. Regamey, W. Hennessen, D. Ikič and J. Ungar (Editors), Progress in Immunobiological Standardization. Vol. 3. Recent Developments in Viral and Bacterial Vaccines. XII + 372 S., 85 Abb., 119 Tab. Basel-New York 1969: S. Karger DM 112,-. J Basic Microbiol 2007. [DOI: 10.1002/jobm.19700100615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Augereau P, Badia E, Carascossa S, Castet A, Fritsch S, Harmand PO, Jalaguier S, Cavaillès V. The nuclear receptor transcriptional coregulator RIP140. Nucl Recept Signal 2006; 4:e024. [PMID: 17088940 PMCID: PMC1630689 DOI: 10.1621/nrs.04024] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2006] [Accepted: 10/17/2006] [Indexed: 12/21/2022]
Abstract
The nuclear receptor superfamily comprises ligand-regulated transcription factors that control various developmental and physiological pathways. These receptors share a common modular structure and regulate gene expression through the recruitment of a large set of coregulatory proteins. These transcription cofactors regulate, either positively or negatively, chromatin structure and transcription initiation. One of the first proteins to be identified as a hormone-recruited cofactor was RIP140. Despite its recruitment by agonist-liganded receptors, RIP140 exhibits a strong transcriptional repressive activity which involves several inhibitory domains and different effectors. Interestingly, the RIP140 gene, located on chromosome 21 in humans, is finely regulated at the transcriptional level by various nuclear receptors. In addition, the protein undergoes several post-translational modifications which control its repressive activity. Finally, experiments performed in mice devoid of the RIP140 gene indicate that this transcriptional cofactor is essential for female fertility and energy homeostasis. RIP140 therefore appears to be an important modulator of nuclear receptor activity which could play major roles in physiological processes and hormone-dependent diseases.
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Fritsch S, Metzeler K, Hiddemann W, Buske C. [Diagnostics and therapy of acute myeloid leukemia]. Dtsch Med Wochenschr 2006; 131:2401-6. [PMID: 17054056 DOI: 10.1055/s-2006-955022] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- S Fritsch
- Medizinische Klinik III, Klinikum Grosshadern der Universität München
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Metzeler K, Fritsch S, Buske C, Hiddemann W. [Acute myeloid leukemia -- on the way towards pathogenesis-oriented treatment]. Dtsch Med Wochenschr 2006; 131:1466-8. [PMID: 16794978 DOI: 10.1055/s-2006-946603] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- K Metzeler
- Medizinische Klinik und Poliklinik III, Klinikum der Universität München, Klinische Kooperationsgruppe Akute Leukämien, GSF Forschungszentrum für Umwelt und Gesundheit
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Loew-Baselli A, Konior R, Pavlova BG, Fritsch S, Poellabauer E, Maritsch F, Harmacek P, Krammer M, Barrett PN, Ehrlich HJ. Safety and immunogenicity of the modified adult tick-borne encephalitis vaccine FSME-IMMUN®: Results of two large phase 3 clinical studies. Vaccine 2006; 24:5256-63. [PMID: 16624457 DOI: 10.1016/j.vaccine.2006.03.061] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2005] [Revised: 02/23/2006] [Accepted: 03/20/2006] [Indexed: 10/24/2022]
Abstract
A prospective, randomised, multicentre, single-blind phase 3 study was performed to assess the safety of a vaccination schedule consisting of two vaccinations (21-35 days apart) with the tick-borne encephalitis (TBE) vaccine FSME-IMMUN "adults" (five consecutive lots) in comparison to another licensed TBE vaccine (Encepur), with polygeline) (two lots) in healthy volunteers (n=3966) aged 16-65 years. The safety of the third vaccination with FSME-IMMUN "adults" (6 months after the first vaccination) was investigated in a follow-up study on the same population (n=3705) and TBE antibody titres were analysed pre- and post-vaccination in a subgroup of volunteers (n=564). Following the first vaccination, the overall incidence of fever (> or =38.0 degrees C) was 0.8% in the FSME-IMMUN "adults" study group and 5.6% in the comparator study group; fever was mainly mild. The fever rate after the second vaccination was 0.6% and 0.5% in the two study groups, respectively. Local and systemic reactions after the first vaccination occurred with a lower frequency in the FSME-IMMUN "adults" study group than in the comparator group. Upon analysing the tolerability of the third vaccination with FSME-IMMUN "adults", similar results were determined in both study groups of volunteers previously vaccinated with FSME-IMMUN "adults" or with the comparator vaccine. The immunogenicity results demonstrated similar seroconversion rates (as determined by ELISA or neutralization test) before and after the third vaccination in the FSME-IMMUN "adults" group and in the comparator group respectively. The results of both studies demonstrate that: (1) FSME-IMMUN "adults" is safe and highly immunogenic, (2) all five production lots of FSME-IMMUN "adults" were consistent with respect to a low rate of adverse events, (3) FSME-IMMUN "adults" induces considerably lower adverse reaction rates than the comparator vaccine after the first vaccination, and (4) two vaccinations with the comparator vaccine can be successfully followed by a third vaccination with FSME-IMMUN "adults".
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Affiliation(s)
- A Loew-Baselli
- Baxter BioScience, Global Clinical R&D, Industriestr. 67, A-1221Vienna, Austria
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Schvoerer E, Fréchin V, Fritsch S, Freitag R, Fuchs A, Gut JP, Stoll-Keller F. Atypical symptoms in patients with herpesvirus DNA detected by PCR in cerebrospinal fluid. J Clin Virol 2006; 35:458-62. [PMID: 16387545 DOI: 10.1016/j.jcv.2005.11.005] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2005] [Revised: 07/13/2005] [Accepted: 11/16/2005] [Indexed: 10/25/2022]
Abstract
BACKGROUND Polymerase chain reaction (PCR) detection of herpesvirus DNA in cerebrospinal fluid (CSF) is an important tool in the diagnosis of central nervous system (CNS) syndromes. The corresponding viral infections present with diverse clinical signs, which are often classical although no sign can be considered as specific. This retrospective study aims to describe atypical symptoms in patients with herpesvirus DNA detected in CSF by PCR. A total of 3452 cerebrospinal fluid samples from patients with suspected herpesvirus infection of the CNS were investigated between 1998 and 2003 in our clinical virology laboratory. "In-house" PCRs for each herpesvirus [herpes simplex virus (HSV), varicella zoster virus (VZV), cytomegalovirus (CMV), Epstein Barr virus (EBV), or human herpes virus 6 (HHV6)] were used until 2001 and a commercially available "Herpes Consensus PCR" was used thereafter. One of the five herpesviruses investigated in this study was found in 71 (2.1%) of CSF samples (37 HSV, 14 VZV, 1 CMV, 9 EBV and 10 HHV6). These samples were obtained from 62 patients whose clinical findings were generally consistent with the PCR data. However, some little known features of herpesvirus-related symptoms, such as partial seizure associated with HSV infection, and unusual VZV or HHV6-related myelitis were also observed.
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Affiliation(s)
- E Schvoerer
- Laboratoire de Virologie, Faculté de Médecine et Hôpitaux Universitaires de Strasbourg, 3 Rue Koeberlé, 67000 Strasbourg Cédex, France.
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Affiliation(s)
- C Brugère
- Service de chirurgie digestive, Hôtel-Dieu, boulevard Léon-Malfreyt, 63058 Clermont-Ferrand, France
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Lesurtel M, Fritsch S, Sellam R, Molinier N, Mosnier H. Does laparoscopic colorectal resection for diverticular disease impair male urinary and sexual function? Surg Endosc 2004; 18:1774-7. [PMID: 15809788 DOI: 10.1007/s00464-004-9012-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2004] [Accepted: 05/26/2004] [Indexed: 10/26/2022]
Abstract
BACKGROUND Laparoscopic colorectal resection may induce bladder and sexual dysfunction secondary to injury to the autonomic nervous system. The aim of this study was to evaluate urinary and sexual function in male patients after laparoscopic colorectal resection for diverticular disease. METHODS From January 1997 to March 2002, we performed a retrospective analysis of urinary and sexual function in 56 consecutive male patients who had undergone laparoscopic colorectal resection for diverticular disease. Preoperative and 6-month postoperative assessment was carried out using data collected via standardized postal questionnaires. RESULTS Three patients were excluded (one had a prior prostatectomy, one had Peyronie's disease, and one was treated with neuroleptics). Fifty-three patients with a mean age of 54 A+/- 2 years were included in the study. There were no conversions. The morbidity rate was 9.4%. Mean follow-up was 27 A+/- 2 months. There was no significant difference in preoperative and postoperative urinary function. Fifty-one patients (96%) were sexually active preoperatively and were still sexually active postoperatively. Compared with the preoperative period, postoperative impairment of libido, erection, ejaculation, and orgasm were not significant. Every patient was able to achieve ejaculation after the intervention, and no retrograde ejaculations were reported. One patient was unable to have an erection after the intervention. CONCLUSION Laparoscopic colorectal resection for diverticular disease does not significantly impair urinary and sexual function.
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Affiliation(s)
- M Lesurtel
- Department of Digestive Surgery, Diaconesses Croix Saint Simon Hospital, 125 rue d'Avron, Paris, 75020, France
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Fritsch S, Lindner V, Welsch S, Massfelder T, Grima M, Rothhut S, Barthelmebs M, Helwig JJ. Intravenous Delivery of PTH/PTHrP Type 1 Receptor cDNA to Rats Decreases Heart Rate, Blood Pressure, Renal Tone, Renin Angiotensin System, and Stress-Induced Cardiovascular Responses. J Am Soc Nephrol 2004; 15:2588-600. [PMID: 15466263 DOI: 10.1097/01.asn.0000141040.77536.af] [Citation(s) in RCA: 25] [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] [Indexed: 11/26/2022] Open
Abstract
While parathyroid hormone type 1 receptor (PTH1R)-mediated vasodilatory, cardiac stimulatory, and renin-activating effects of exogenous PTH/PTH-related protein (PTHrP) are acknowledged, interactions of endogenous PTHrP with these systems remain unclear, mainly because the unavailability of viable PTHrP/PTH1R knockout mice. Transgenic mice overexpressing PTH1R in smooth muscle strongly have supported the PTHrP/PTH1R system as a cardiovascular system (CVS) regulator, but the consequences on renovascular (RVS) and renin-angiotensin systems (RAS) have not been explored in these studies. The aim was to develop a model in which one could study the consequences on CVS, RVS, and RAS of generalized PTH1R overexpression. Systemic PTH1R cDNA plasmid delivery was used in adult rats, a system that is amenable to studies in isolated perfused kidneys and that minimizes development-induced compensatory mechanisms. Intravenous administration of hPTH1R or green fluorescence protein-tagged hPTH1R in pcDNA3 resulted 3 wk later, in generalized expression of hPTH1R (mRNA and protein), especially in vessels, liver, heart, kidney, and central nervous system, where it is expressed physiologically. As expected, PTH1R overexpression decreased BP and renal tone. Unexpected, however, PTH1R overexpression decreased heart rate. These studies also revealed that endogenous PTHrP actually inhibits renin release and that hPTH1R overexpression tends to increase that effect. Striking, liver production and circulatory level of angiotensinogen and hence plasma renin activity were markedly reduced. Thus, abrupt PTH1R overexpression in adult rats profoundly alters the CVS, RVS, and RAS, strongly supporting the PTH/PTHrP/PTH1R system as crucial for heart and vascular tone regulation. In addition, these results revealed that PTH1R-mediated mechanisms might have protective effects against cardiovascular stress-induced responses, including stimulations in heart rate and RAS.
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Affiliation(s)
- Samuel Fritsch
- Renovascular Pharmacology and Physiology (INSERM), University of Louis Pasteur School of Medicine, Strasbourg, France
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Eichinger A, Fiaschi-Taesch N, Massfelder T, Fritsch S, Barthelmebs M, Helwig JJ. Transcript expression of the tuberoinfundibular peptide (TIP)39/PTH2 receptor system and non-PTH1 receptor-mediated tonic effects of TIP39 and other PTH2 receptor ligands in renal vessels. Endocrinology 2002; 143:3036-43. [PMID: 12130570 DOI: 10.1210/endo.143.8.8960] [Citation(s) in RCA: 13] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Although lower than in brain, the type 2 PTH receptor (PTH2-R) has been shown to be expressed throughout the cardiovascular system. Tuberoinfundibular peptide (TIP) purified from brain is thought to be the endogenous selective ligand of the PTH2-R. In the present studies, TIP and PTH2-R mRNA expressions were evidenced by RT-PCR in rat intrarenal arteries as well as in renovascular smooth muscle cells cultured from these arteries. In the isolated perfused rat kidney (IPK), peptides known to bind to both PTH1- and PTH2-Rs, such as rat PTH (1-34) and the hybrid PTH/PTHrP peptide, [Ile(5), Trp(23)]PTHrP (1-36), failed to exhibit improved vasodilatory effect, compared with human PTHrP (1-36), which binds only to the PTH1-R. Thus, a non-PTH1-R seemed not to be involved in the vasodilatory effects of these peptides. On the other hand, TIP exhibited complex vasoactivity, constricting the IPK at 10 nM and dilating the IPK at 1, 100, and 1000 nM. Moreover, [p-benzoyl-L-Phe(4),Ile(5),Trp(23)]PTHrP (1-36), initially described as a selective PTH2-R antagonist, also displayed a strong vasodilatory effect and therefore could not be used to check that TIP-induced vasoactivity was mediated by the PTH2-R. However, both [p-benzoyl-L-Phe(4),Ile(5),Trp(23)]PTHrP (1-36) and TIP displayed similar or even enhanced vasodilation in IPK in which PTH1-R-induced vasodilation was fully desensitized by sustained exposure to human PTHrP (1-36). Importantly, in IPK desensitized to the vasodilatory action of PTHrP (1-36), the hybrid PTH/PTHrP peptide and rat PTH (1-34), whose vasodilatory responses appeared exclusively PTH1-R dependent in naive IPK, produced a new and strong vasodilation. In conclusion, TIP and PTH2-R mRNAs are expressed in renal vessels and TIP appears as a new vasoactive peptide. Whether TIP interacts with PTH2-R could not be shown. However, these studies reveal the ability of TIP, as well as of other peptides known to bind to the PTH2-R, to dilate renal vessels in a PTH1-R-independent manner. Moreover, results obtained in IPK desensitized to the vasodilatory action of PTHrP (1-36) strongly suggest that TIP, along with PTHrP, might be coordinately involved in the regulation of renal hemodynamics.
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MESH Headings
- Animals
- Kidney/blood supply
- Male
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/metabolism
- Neuropeptides/genetics
- Neuropeptides/physiology
- Parathyroid Hormone/pharmacology
- Parathyroid Hormone-Related Protein
- Proteins/pharmacology
- RNA, Messenger/analysis
- Rats
- Rats, Wistar
- Receptor, Parathyroid Hormone, Type 2
- Receptors, Parathyroid Hormone/genetics
- Receptors, Parathyroid Hormone/physiology
- Vasodilation/drug effects
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Affiliation(s)
- Anne Eichinger
- Renovascular Pharmacology and Physiology, National Institute of Health and Medical Research, University Louis Pasteur Medical School, 11 rue Humann, Bâtiment 4, F67085 Strasbourg Cedex, France
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Massfelder T, Taesch N, Fritsch S, Eichinger A, Barthelmebs M, Stewart AF, Helwig JJ. Type 1 parathyroid hormone receptor expression level modulates renal tone and plasma renin activity in spontaneously hypertensive rat. J Am Soc Nephrol 2002; 13:639-648. [PMID: 11856767 DOI: 10.1681/asn.v133639] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [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: 11/03/2022] Open
Abstract
These studies examine whether PTHrP(1-36), a vasodilator, modulates BP and renal vascular resistance (RVR) in spontaneously hypertensive rat (SHR). Within the kidney of normotensive rats, PTHrP(1-36) was enriched in vessels. In vessels of SHR, PTHrP was upregulated by 40% and type 1 PTH receptor (PTH1R) was downregulated by 65% compared with normotensive rats. To investigate the role of endogenous PTHrP in the regulation of BP and RVR, SHR were subjected to somatic human (h)PTH1R gene delivery. Three weeks after a single intravenous injection of pcDNA1.1 plasmid containing the hPTH1R gene under the control of the cytomegalovirus promoter, hPTH1R mRNA was detected in all of the main organs. Within the kidney, the transgene was enriched in vessels. In the isolated perfused kidney, RVR was reduced by 23% and PTHrP(1-36)-induced vasodilation, which is depressed in SHR, was restored and a vasoconstrictory response to PTH(3-34), a PTH1R antagonist, was revealed. These effects were not observed in control SHR treated with empty plasmid. BP remained unchanged, and plasma renin activity increased by 60%. Thus, in SHR renal vessels, a reduced number of PTH1R contributes to the high RVR, despite the higher expression of vasodilatory PTHrP. Moreover, these studies provide evidence for a direct link between the density of PTH1R and plasma renin activity, which might be responsible for the absence of effect of PTH1R gene delivery on BP in SHR. Overall, PTHrP significantly contributes to the homeostasis of renal and systemic hemodynamics in SHR.
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Affiliation(s)
- Thierry Massfelder
- *Section of Renovascular Pharmacology and Physiology (INSERM-ULP), University Louis Pasteur School of Medicine, Strasbourg, France; and Division of Endocrinology and Metabolism, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Nathalie Taesch
- *Section of Renovascular Pharmacology and Physiology (INSERM-ULP), University Louis Pasteur School of Medicine, Strasbourg, France; and Division of Endocrinology and Metabolism, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Samuel Fritsch
- *Section of Renovascular Pharmacology and Physiology (INSERM-ULP), University Louis Pasteur School of Medicine, Strasbourg, France; and Division of Endocrinology and Metabolism, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Anne Eichinger
- *Section of Renovascular Pharmacology and Physiology (INSERM-ULP), University Louis Pasteur School of Medicine, Strasbourg, France; and Division of Endocrinology and Metabolism, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Mariette Barthelmebs
- *Section of Renovascular Pharmacology and Physiology (INSERM-ULP), University Louis Pasteur School of Medicine, Strasbourg, France; and Division of Endocrinology and Metabolism, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Andrew F Stewart
- *Section of Renovascular Pharmacology and Physiology (INSERM-ULP), University Louis Pasteur School of Medicine, Strasbourg, France; and Division of Endocrinology and Metabolism, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Jean-Jacques Helwig
- *Section of Renovascular Pharmacology and Physiology (INSERM-ULP), University Louis Pasteur School of Medicine, Strasbourg, France; and Division of Endocrinology and Metabolism, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
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Fritsch S. Replenishment of PTH1 receptor pool by peripheral receptor gene delivery in spontaneously hypertensive rats (SHR) does not affect blood pressure but increases plasma renin activity. Am J Hypertens 2001. [DOI: 10.1016/s0895-7061(01)01953-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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Rey D, Fritsch S, Schmitt C, Meyer P, Lang JM, Stoll-Keller F. Quantitation of hepatitis C virus RNA in saliva and serum of patients coinfected with HCV and human immunodeficiency virus. J Med Virol 2001; 63:117-9. [PMID: 11170047] [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: 02/18/2023]
Abstract
The presence and the quantity of hepatitis C virus (HCV) RNA were investigated in saliva and serum of patients infected with both HCV and human immunodeficiency virus (HIV). Paired serum and saliva samples were collected from 59 HIV-HCV coinfected patients. HCV RNA was detected by nested-PCR, using primers derived from the 5' non-coding region of HCV, and positive results were quantified using the b-DNA method. HCV RNA was detected in the saliva of 22/59 (37.3%) patients, with a mean level of 1.15 x 10(6) genome equivalents/ml; there was no correlation of salivary positivity with immune status (CD4 cell count), age or HIV risk group, but there was with gender (19/38 [50%] positive results in male, compared to 3/21 [14.3%] in female, P = 0.007). HCV RNA was detected in the serum of 45/59 (76.3%) patients at a higher level (mean of 2.52 x 10(7) genome equivalents/ml) compared to saliva. Positivity was not correlated with age, gender or CD4 + cell count. There was a correlation between qualitative saliva and serum results (P = 0.003), but not between quantifications (P = 0.57). This first study reporting significant amounts of HCV RNA in saliva could have important implications for HCV epidemiology.
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Affiliation(s)
- D Rey
- Centre d'Informations et de Soins de l'Immunodéficience Humaine, Clinique Médicale A, Hôpitaux Universitaires, Strasbourg, France.
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39
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Rey D, Fritsch S, Schmitt C, Meyer P, Lang J, Stoll-Keller F. Quantitation of hepatitis C virus RNA in saliva and serum of patients coinfected with HCV and human immunodeficiency virus. J Med Virol 2001. [DOI: 10.1002/1096-9071(20000201)63:2<117::aid-jmv1005>3.0.co;2-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Abstract
Primary malignant melanoma of the esophagus is a rare but aggressive tumor that accounts for less than 0.1-0.2% of all esophageal malignancies. The aim of this study was to report a case of primary malignant melanoma of the esophagus in a 72-year-old woman. The diagnosis was histologically proven, but the patient died despite extensive surgical resection.
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Affiliation(s)
- A Guermazi
- Service de radiologie, hôpital Saint-Louis, 1, avenue Claude-Vellefaux, 75010 Paris, France.
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Abstract
OBJECTIVE The purpose of this study was to explore both the personality characteristics and the symptoms of personality disorder of adolescent suicide attempters, as well as the relationship between personality variables and hopelessness in this population. METHOD Two sample populations were used in this study. First, 102 adolescent suicide attempters between 13 and 18 years of age completed the Millon Adolescent Personality Inventory (MAPI) and the Hopelessness Scale for Children (HSC). A second group of 35 adolescent suicide attempters were administered the HSC and the revised Diagnostic Interview for Borderlines (DIB). RESULTS No distinctive personality characteristics or symptoms of personality disorders were found. However, affective distress seemed to be the most prominent feature in the presentation of these adolescents. Additionally, high scores on the HSC were associated with elevated scores on the Personality Style scales of the MAPI and higher (more dysfunctional) scores on Affect Regulation on the DIB. CONCLUSIONS The results suggest that clinicians should focus most on the personality characteristic of sensitivity and on affect regulation when assessing adolescent suicide attempters. In addition, hopelessness is important to systematically assess because it appears to be related to a variety of dysfunctional personality characteristics that may affect follow-up outcome.
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Affiliation(s)
- S Fritsch
- Rhode Island Hospital, Providence 02903, USA
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42
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Rey D, Vidinic-Moularde J, Meyer P, Schmitt C, Fritsch S, Lang JM, Stoll-Keller F. High prevalence of GB virus C/hepatitis G virus RNA and antibodies in patients infected with human immunodeficiency virus type 1. Eur J Clin Microbiol Infect Dis 2000; 19:721-4. [PMID: 11057510 DOI: 10.1007/s100960000352] [Citation(s) in RCA: 31] [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] [Indexed: 11/27/2022]
Abstract
The prevalence of GB virus C (GBV-C)/ hepatitis G virus (HGV) RNA and antibodies to the structural E2 protein was investigated in a cohort of HIV-1 infected patients. Of 346 individuals, RNA was detected in 143 and E2 antibodies were detected in 73, for an overall prevalence of 62.4%. Intravenous drug use and homosexuality were identified as major transmission risk factors. GBV-C/HGV RNA prevalence was associated with hepatitis B coinfection, whereas antibodies to E2 were associated with older age and lower CD4+ cell counts. GBV-C/HGV infection was frequent in this group of HIV-infected patients and was associated with older age, lower CD4 + cell counts, and the presence of hepatitis B surface antigen.
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Affiliation(s)
- D Rey
- CISIH, Clinique Médicale A. Hôpitaux Universitaires, Strasbourg, France.
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43
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Martinot-Peignoux M, Le Breton V, Fritsch S, Le Guludec G, Labouret N, Keller F, Marcellin P. Assessment of viral loads in patients with chronic hepatitis C with AMPLICOR HCV MONITOR version 1.0, COBAS HCV MONITOR version 2.0, and QUANTIPLEX HCV RNA version 2.0 assays. J Clin Microbiol 2000; 38:2722-5. [PMID: 10878070 PMCID: PMC87008 DOI: 10.1128/jcm.38.7.2722-2725.2000] [Citation(s) in RCA: 17] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The correlation between response to antiviral therapy and pretreatment viral load in patients with chronic hepatitis C has prompted the development of quantitative assays to measure viral load. The aim of our study was to assess the clinical relevance of the newly developed semiautomated PCR system COBAS HCV MONITOR version 2.0 in comparison with (i) the AMPLICOR HCV MONITOR version 1.0 assay, which underestimates RNA concentration of hepatitis C virus (HCV) genotypes 2 to 6, and (ii) the QUANTIPLEX HCV RNA version 2.0 assay, which achieves equivalent quantification for each HCV genotype, with samples from 174 patients diagnosed with chronic hepatitis C before therapy. The level and range of quantification measured with AMPLICOR HCV MONITOR version 1.0 were 1 log lower than when measured with the COBAS HCV MONITOR version 2.0, at 0.261 x 10(6) RNA copies/ml (range, 0.001 x 10(6) to 2.50 x 10(6) RNA copies/ml) and 4.032 x 10(6) RNA copies/ml (range, 0.026 x 10(6) to 72.6 x 10(6) RNA copies/ml), respectively. The two assays showed a poor correlation (r(2) = 0.175). The level and range of quantification were similar when measured with the COBAS HCV MONITOR version 2.0 and QUANTIPLEX HCV RNA version 2.0 assays, at 3.03 x 10(6) RNA copies/ml (range, 0.023 x 10(6) to 72.6 x 10(6) RNA copies/ml) and 4.91 Meq/ml (range, 0.200 to 49.5 Meq/ml), respectively. The two assays showed a strong correlation (r(2) = 0. 686) for each HCV genotype. The duration of treatment (6 or 12 months) is modulated according to HCV genotype and viral load. Our results indicate that COBAS HCV MONITOR version 2.0 and QUANTIPLEX HCV RNA version 2.0 assays showing an equal dynamic range for each HCV genotype are suitable tools to assess patients before therapy.
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Affiliation(s)
- M Martinot-Peignoux
- Unité de Recherche INSERM U481, Centre de Recherche Claude Bernard sur les Hépatites Virales and Service d'Hépatologie, Hôpital Beaujon, 92110 Clichy, France.
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44
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Frey B, Kreiner G, Fritsch S, Veit F, Gössinger HD. Successful treatment of idiopathic left ventricular outflow tract tachycardia by catheter ablation or minimally invasive surgical cryoablation. Pacing Clin Electrophysiol 2000; 23:870-6. [PMID: 10833708 DOI: 10.1111/j.1540-8159.2000.tb00857.x] [Citation(s) in RCA: 30] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Idiopathic right ventricular outflow tract tachycardia is readily amenable to radiofrequency catheter ablation. However, treatment modalities for left ventricular outflow tract tachycardia are not well defined. Out of 37 patients with idiopathic outflow tract tachycardia referred for catheter ablation, in 3 patients tachycardia originated from the left ventricular outflow tract. On the surface ECG, all left ventricular tachycardias exhibited an inferior axis with a predominant negative QRS complex in lead I. Heart rate during tachycardia ranged from 115 to 170 beats/min. During electrophysiological testing, 1 patient had inducible tachycardia on orciprenaline challenge, 1 patient had inducible tachycardia at baseline, and 1 patient had incessant tachycardia. In two patients, earliest ventricular activation was recorded from the endocardial left ventricular outflow tract at an anterolateral and an anterior site, respectively. A distinct high frequency spike preceded the QRS onset by 66/78 ms. Application of radiofrequency energy successfully eliminated tachycardia at these sites. In one patient, tachycardia originated from the epicardial left ventricular outflow tract. Mapping of the anterior interventricular vein revealed a fractionated low amplitude signal occurring 46 ms before QRS onset. After failure of catheter ablation from the corresponding endocardial site, successful minimally invasive surgical focal cryoablation of the epicardial target region was performed. During a follow-up period ranging from 7 to 12 months, all patients remained free of tachycardia. In conclusion, ventricular tachycardia arising from the left ventricular outflow tract may require endo- and epicardial mapping. Successful treatment is achieved by radiofrequency catheter ablation or minimally invasive surgical cryoablation.
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Affiliation(s)
- B Frey
- Department of Cardiology, University of Vienna, Austria
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45
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Rey D, Fritsch S, Schmitt C, Partisani M, Kempf-Durepaire G, Nicolle M, Krantz V, De Mautort E, Stoll-Keller F, Lang JM. [Emergence of resistant hepatitis B virus strains during long-term lamivudine therapy in human immunodeficiency virus co-infected patients]. Gastroenterol Clin Biol 2000; 24:125-7. [PMID: 10679599] [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] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
Seven patients co-infected with hepatitis B virus (HBsAg and HBeAg carriers, quantifiable HBV DNA with the bDNA technic) and human immunodeficiency virus received a triple antiretroviral combination therapy, including lamivudine (150 mg twice a day). Hepatitis B viral load rapidly became undetectable in 6/7 patients. It remained below the level of detection in 2 subjects, after 20 and 22 months of treatment, with one of them achieving HBeAg/anti-HBe seroconversion. However, in the other 4 individuals, hepatitis B viremia increased again after 8 to 16 months of lamivudine-containing regimen. The last patient was a non-responder. The 4 relapsers developed a double mutation Leu(528) for Met(528) and Met(552) for Val(552), on hepatitis B virus polymerase, either concomitant (M8 and M16) with a hepatitis B virus DNA increase, or 2 months earlier (M10 and M12). The high frequency of hepatitis B virus resistance to lamivudine emphasizes the necessity of identifying more effective strategies, such as double combination therapies.
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Affiliation(s)
- D Rey
- Centre d'Informations et de Soins de l'Immunodéficience Humaine, Clinique Médicale A, Hôpitaux Universitaires, Strasbourg
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46
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Pocard M, Vaillant JC, Fritsch S, Aoudjhane M, Najman A, Parc R. Possible first report of distant peritoneal metastases from a nodal mesenteric lymphoma after laparoscopic inguinal hernia repair. Eur J Surg Oncol 1999; 25:635-6. [PMID: 10556014 DOI: 10.1053/ejso.1999.0722] [Citation(s) in RCA: 2] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Laparoscopic surgery has gained wide acceptance. However, there is still debate as to its role in assessment and staging of gastrointestinal malignancies(1)since it may promote dissemination of cancer cells.(2)We report the first case of a low-grade mesenteric nodal lymphoma for laparoscopic hernia repair, complicated by distant implants both on the peritoneum and wall mesh.
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Affiliation(s)
- M Pocard
- Department of Surgery, Saint-Antoine University Hospital, Paris, France
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47
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Toledo L, Gossot D, Fritsch S, Revillon Y, Reboulet C. [Study of sustained forces and the working space of endoscopic surgery instruments]. Ann Chir 1999; 53:587-97. [PMID: 10520498] [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] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
UNLABELLED The instruments currently used in endoscopic surgery are limited by several factors, in particular their reduced working space. In order to develop instruments with manifold degrees of freedom (DOF), the elementary actions performed by the existing instruments must be defined. MATERIAL AND METHODS We have broken down into elementary movements the actions performed by the currently used instruments and analyzed them by measuring the strain on the instruments and on their working volume. The elementary actions were performed in vitro (Pelvitrainer) on an animal model (pig) and also in the course of clinical practice. A total of 6,750 measurements were carried out for the following actions: grasping, cutting, dissecting, suturing and knotting. RESULTS The largest working volumes were measured for the knotting and suturing actions (198 degrees in axial rotation and 69 degrees in lateral translation). The range of the working space was between 8 degrees and 52 degrees. Forces exerted on the instrument were between 0.5 and 12 Newton (N). Forces exerted on the headpoint were between 0.4 and 10.5 N whereas the friction forces were between 0.5 and 1.5 N. COMMENTS By analyzing the elementary actions of endoscopic surgery, we were able to quantify the directions and dimensions of forces sustained by the instruments and were also able to measure the working volume involved when performing the main actions in endoscopic surgery. The results obtained provide a basis for the development of more sophisticated instruments.
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Affiliation(s)
- L Toledo
- Service de Chirurgie, Hôpital Saint-Louis, Paris
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48
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Labouret N, Cecille A, Wendling MJ, Fritsch S, Gut JP, Stoll-Keller F. [Prenatal diagnosis of viral infections. A two year study in Strasbourg]. Pathol Biol (Paris) 1999; 47:526-30. [PMID: 10418033] [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] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
We report here the results of a 2-year study on the prenatal diagnosis of viral infections in Strasbourg. This screening was carried out by virus isolation, by PCR assay, or by detection of IgM fetal antibody for 98 pregnant women at risk of transmitting one of the viruses that causes fetal disease such as parvovirus B19 (B19), Herpesviruses [cytomegalovirus (CMV), varicella-zoster virus, herpes simplex virus] and rubella virus. A viral etiology was proven in 7 out 98 cases: PCR applied to B19 DNA detection was positive in 5 amniotic fluids (AF), 2 fetal serums and one ascitic liquid. The diagnosis of 2 cases of CMV infection was obtained by both PCR and virus isolation in AF from twins fetuses. The detection of specific IgM in maternal serum or fetal serum is useful to achieve the diagnosis but serological tests on other samples have no efficiency. No virus was found in any other specimen, but the genome of Toxoplasma gondii was detected by PCR in 1 of 17 AF samples analyzed at the Institut de Parasitologie. These findings show that PCR assay is a sensitive method for the positive diagnosis of intrauterine infection and promises to careful follow-up of the pregnancy.
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Affiliation(s)
- N Labouret
- Institut de Virologie de la Faculté de Médecine, Hôpitaux Universitaires de Strasbourg, France
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49
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Rey D, Fraize S, Vidinic J, Meyer P, Fritsch S, Labouret N, Schmitt C, Lang JM, Stoll-Keller F. High prevalence of GB virus C/hepatitis G virus RNA in patients infected with human immunodeficiency virus. J Med Virol 1999. [PMID: 9890425 DOI: 10.1002/(sici)1096-9071(199901)57:1<75::aid-jmv11>3.0.co;2-b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Prevalence of GBV-C/HGV was determined in a cohort of HIV-infected patients, via a reverse transcription-polymerase chain reaction detection of RNA in serum, amplifying the NS5 region of GBV-C/HGV genome. GBV-C/HGV RNA was detected in 143 (37.7%) of 379 patients, with similar results in the different HIV risk groups: 25/56 (44.6%) in intravenous drug users, 66/161 (41%) in homo- and bisexual men, 35/108 (32.4%) in heterosexual patients, 6/20 (30%) in transfusion recipients (P=0.41). There was no difference according to the presence or absence of hepatitis C virus infection. In univariate analysis, GBV-C/HGV genome prevalence was lower in patients over 50 years old (18.2%), compared to other age groups (20-29 years: 34.2%; 30-39 years: 44.3%; 40-49 years: 36.7%, P=0.03), as well as in patients with normal CD4 cell count (29.2% vs. 45.4% between 200-500/mm3, and 35.3% below 200 CD4/mm3, P=0.012) and individuals with a chronic hepatitis B. However, in the multivariate analysis, the only prognostic factor of GBV-C/HGV RNA positivity was the presence of a chronic hepatitis B, compared to the absence of any HBV marker, or a previous exposition to HBV (presence of anti-HBc and/or anti-HBs, absence of HBsAg), or the presence of anti-HBs alone.
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Affiliation(s)
- D Rey
- CISIH, Clinique Médicale A, Hôpitaux Universitaires, Strasbourg, France.
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50
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Abstract
BACKGROUND Intraoperative bleeding is the main complication and main cause of conversion to open surgery during laparoscopic splenectomy (LS). We present the advantages of the lateral approach and the use of the ultrasonic shears (US) for achieving a safer vascular control. METHODS We have performed a total of 48 LS using several approaches. In our initial experience 10 patients underwent surgery with an anterior approach. In the second series of 18 patients, we used a manually assisted procedure. In the last 20 patients, we employed a technique with a full lateral position. Only three ports have been used. The major part of the dissection was conducted from behind, thus allowing a safer vascular control. The division of short gastric vessels and lower pole vessels was performed using US. The main vascular pedicle was stapled. The spleen was removed through a short Pfannenstiel incision. There were 9 males and 11 females with a mean age of 36 years (range, 18-71 years). Fourteen had immune thrombocytopenic purpura (ITP); two had an HIV-infection-related purpura; two had an autoimmune hemolytic anemia; and two had a spherocytosis. RESULTS All the 20 LS were completed. The average splenic weight was 274 g (range, 162-1,400 g). In all but one patient, the intraoperative blood loss was less than 60 ml, and was none in six patients (average, 51 ml). In our initial series of 10 patients surgically treated with an anterior approach, the average blood loss was 180 ml, and it was 230 ml in the series of hand-assisted procedures. The average operative time was 127 min (range, 70-220 min), including the time required by the change of position and the Pfannenstiel incision. There was no mortality. All but one patient had an uneventful postoperative course. The HIV-infected patient had a severe postoperative pancreatitis. In those patients with an uncomplicated course, the average postoperative stay was 4.3 days (range, 2-8 days). CONCLUSIONS The lateral position with a posterior approach to splenic vessels allows for safe vascular control. The use of US results in a gain of time and safety. The average intraoperative bleeding of this series is much lower than that observed in our previous experience and in other published series.
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Affiliation(s)
- D Gossot
- Department of Surgery, Hôpital Saint-Louis, F-75010 Paris, France
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