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Schneider P, Keller P, Schubert I, Bender M, Trautmann C, Dürr M. Bond-specific fragmentation of oligopeptides via electronic stopping of swift heavy ions in molecular films. Sci Rep 2022; 12:17975. [PMID: 36289262 PMCID: PMC9605986 DOI: 10.1038/s41598-022-21744-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 09/30/2022] [Indexed: 01/24/2023] Open
Abstract
Highly bond-specific fragmentation of oligopeptides induced by swift heavy ion (SHI) irradiation was investigated by means of mass spectrometry. In pronounced contrast to measurements of samples irradiated with keV ions, oligopeptides which were exposed to 946 MeV Au ions show a high abundance of specific fragments. The highly bond-specific nature of SHI-induced fragmentation is attributed to electronic stopping as the most relevant energy loss mechanism for SHI in the oligopeptide samples in combination with the subsequent coupling between the excited electronic and the atomic subsystem. Fragmentation induced by SHI is observed to be further influenced by the structure of the oligopeptides, suggesting that electronic excitation and/or the electronic-vibrational coupling depend on the details of the molecular structure.
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Affiliation(s)
- P. Schneider
- grid.8664.c0000 0001 2165 8627Institut für Angewandte Physik and Zentrum für Materialforschung, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
| | - P. Keller
- grid.8664.c0000 0001 2165 8627Institut für Angewandte Physik and Zentrum für Materialforschung, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
| | - I. Schubert
- grid.159791.20000 0000 9127 4365GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstrasse 1, 64291 Darmstadt, Germany
| | - M. Bender
- grid.159791.20000 0000 9127 4365GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstrasse 1, 64291 Darmstadt, Germany ,grid.449475.f0000 0001 0669 6924Fachbereich Ingenieurwissenschaften, Hochschule RheinMain, Kurt-Schumacher-Ring 18, 65197 Wiesbaden, Germany
| | - C. Trautmann
- grid.159791.20000 0000 9127 4365GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstrasse 1, 64291 Darmstadt, Germany ,grid.6546.10000 0001 0940 1669Fachbereich Materialwissenschaften, Technische Universität Darmstadt, Alarich-Weiss-Strasse 2, 64287 Darmstadt, Germany
| | - M. Dürr
- grid.8664.c0000 0001 2165 8627Institut für Angewandte Physik and Zentrum für Materialforschung, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
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Bourenkov G, Schneider T, Dakshinamoorthy U, Paknia E, Fogh R, Keller P, Flensburg C, Vonrhein C, Bricogne G, Schulze-Briese C, Chari A. Enabling high-energy large-unit-cell ultra-high-resolution X-ray crystallography on the P14 at PETRAIII beamline. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322096097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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Weil S, Jung E, Domínguez Azorín D, Higgins J, Reckless J, Ramsden N, Keller P, Grainger D, Wick W, Winkler F. P10.02 Combined methods of a micropump system and a chronic cranial window allows tumor observation with multi photon laser scanning microscopy under continuous treatment. Neuro Oncol 2021. [DOI: 10.1093/neuonc/noab180.095] [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: 11/13/2022] Open
Abstract
Abstract
BACKGROUND
Glioblastomas are notoriously therapy resistant tumors. As opposed to other tumor entities, no major advances in therapeutic success have been made in the past decades. This has been calling for a deeper biological understanding of the tumor, its growth and resistance patterns. We have been using a xenograft glioma model, where human glioblastoma cells are implanted under chronic cranial windows and studied longitudinally over many weeks and months using multi photon laser scanning microscopy (MPLSM). To test the effect of (new) drugs, a stable and direct delivery system avoiding the blood-brain-barrier has come into our interest.
MATERIAL AND METHODS
We implanted cranial windows and fluorescently labeled human glioblastoma stem-like cells into NMRI nude mice to follow up on the tumor development in our MPLSM model. After tumor establishment, an Alzet® micropump was implanted to directly deliver agents via a catheter system continuously over 28 days directly under the cranial window onto the brain surface. Using the MPLSM technique, the continuous delivery and infusion of drugs onto the brain and into the tumor was measured over many weeks in detail using MPLSM.
RESULTS
The establishment of the combined methods allowed reliable concurrent drug delivery over 28 days bypassing the blood-brain-barrier. Individual regions and tumor cells could be measured and followed up before, and after the beginning of the treatment, as well as after the end of the pump activity. Fluorescently labelled drugs were detectable in the MPLSM and its distribution into the brain parenchyma could be quantified. After the end of the micropump activity, further MPLSM measurements offer the possibility to observe long term effects of the applied drug on the tumor.
CONCLUSION
The combination of tumor observation in the MPSLM and concurrent continuous drug delivery is a feasible and reliable method for the investigation of (novel) anti-tumor agents, especially drugs that are not blood-brain-barrier penetrant. Morphological or even functional changes of individual tumor cells can be measured under and after treatment. These techniques can be used to test new drugs targeting the tumor, its tumor microtubes and tumor cells networks, and measure the effects longitudinally.
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Affiliation(s)
- S Weil
- Neurology Clinic and National Center for Tumor Diseases, University Hospital Heidelberg, Heidelberg, Germany
- Clinical Cooperation Unit Neurooncology, German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - E Jung
- Neurology Clinic and National Center for Tumor Diseases, University Hospital Heidelberg, Heidelberg, Germany
- Clinical Cooperation Unit Neurooncology, German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - D Domínguez Azorín
- Neurology Clinic and National Center for Tumor Diseases, University Hospital Heidelberg, Heidelberg, Germany
- Clinical Cooperation Unit Neurooncology, German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - J Higgins
- Divide & Conquer, Cambridge, United Kingdom
| | - J Reckless
- Divide & Conquer, Cambridge, United Kingdom
| | - N Ramsden
- Divide & Conquer, Cambridge, United Kingdom
| | - P Keller
- Divide & Conquer, Cambridge, United Kingdom
| | - D Grainger
- Divide & Conquer, Cambridge, United Kingdom
| | - W Wick
- Neurology Clinic and National Center for Tumor Diseases, University Hospital Heidelberg, Heidelberg, Germany
- Clinical Cooperation Unit Neurooncology, German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - F Winkler
- Neurology Clinic and National Center for Tumor Diseases, University Hospital Heidelberg, Heidelberg, Germany
- Clinical Cooperation Unit Neurooncology, German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
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Keller P, Mazo I, Gao Y, Reddy V, Caballero F, Stephens B, Marvin J, Fu A, Sun Y, Jenkins R, von Andrian U, Mempel T. 1020P MPT-0118 a clinical drug candidate to assess Treg reprogramming via MALT1 blockade. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1404] [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: 10/20/2022] Open
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Keller P, Vanwesenbeeck I, Hudders L, Decloedt A. Horse owners' attitudes towards and motivators for using complementary and alternative veterinary medicine. Vet Rec 2021; 189:e303. [PMID: 33899957 DOI: 10.1002/vetr.303] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 02/16/2021] [Accepted: 03/07/2021] [Indexed: 11/12/2022]
Abstract
BACKGROUND Complementary and alternative veterinary medicine (CAVM) is becoming increasingly popular in horses. METHODS Online, cross-sectional survey in 1532 horse owners. Attitude towards CAVM, subjective norms, perceived behavioural control and intention for future CAVM use were measured based on the theory of planned behaviour. Structural equation modelling was performed to characterize factors influencing intention to use CAVM. RESULTS Past use of CAVM, predominantly manual therapies and herbal supplements, was reported by 72.5% of all participants. Frequently reported indications were improving horse's well-being, illness which did not resolve after conventional treatment and chronic illness. The attitude towards CAVM was positive with a median (interquartile range) score of 6 of 7 (4.75-7.00). Predictors for past CAVM use were higher owner age, alternative medicine self-use and higher education (non-university). The strongest predictor of future CAVM usage was perceived behavioural control and perceived CAVM efficacy, as well as positive attitude towards and perceived knowledge about CAVM. The veterinarian was reported as a source of information about CAVM by 86.4% of all participants. CONCLUSIONS Horse owners showed a high intention to use CAVM with the owners' perceived behavioural control and perceived CAVM efficacy as the strongest predictor. Veterinarian-client communication is important to inform horse owners correctly.
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Affiliation(s)
- P Keller
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - I Vanwesenbeeck
- Centre for Persuasive Communication, Department of Communication Sciences, Faculty of Political and Social SciencesGhent University, Ghent, Belgium
| | - L Hudders
- Centre for Persuasive Communication, Department of Communication Sciences, Faculty of Political and Social SciencesGhent University, Ghent, Belgium
| | - A Decloedt
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
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Magistro G, Westhofen T, Schott M, Keller P, Tamalunas A, Stief C. Enucleation vs. resection: A matched-pair analysis of TURP, HoLEP and bipolar TUEP. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)34056-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Ross W, Chu A, Li L, Keller P, Kunselman A, Harkins G, Deimling T, Benton A. 14: Coincidental appendectomy in the surgical management of women with endometriosis and pelvic pain. Am J Obstet Gynecol 2020. [DOI: 10.1016/j.ajog.2019.12.037] [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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Schneider C, Stutz-Grunder E, Lüer S, Keller P, Kremer Hovinga JA, Ammann RA, Karow A. Fulminant Essential Thrombocythemia Associated with Acquired Von Willebrand Syndrome and Bleeding Episodes in a 14-year-old Girl. Hamostaseologie 2019; 39:404-408. [PMID: 30895567 DOI: 10.1055/s-0039-1679929] [Citation(s) in RCA: 2] [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: 10/27/2022] Open
Abstract
BACKGROUND Essential thrombocythemia is a chronic myeloproliferative neoplasm. It is extremely rare in children below 15 years of age with an estimated annual incidence of only 0.09 per million. Usually, clinical symptoms associated with essential thrombocythemia are mild or absent. CASE Here, we present the case of a 14-year-old female patient fulminantly presenting with acute symptoms comprising visual impairment, palmar and plantar stabbing pain. Blood count revealed massive thrombocytosis of 2373 × 109/L. Bone marrow morphology showed elevated numbers of mature megakaryocytes. Von Willebrand factor activity/antigen ratio was significantly reduced compatible with an acquired Von Willebrand syndrome associated with high platelet counts. Molecular analyses for driver mutations of myeloproliferative neoplasms including JAK2V617F, CALR and MPL were negative. Acute therapy comprising hyperhydration and oxygen supply complemented by acetylsalicylic acid led to amelioration of symptoms. Medication with hydroxycarbamide maintained a significant reduction of platelet counts but had to be reduced or withheld several times due to neutropenia. Repeated bleeding episodes observed in the course were clearly associated with increases in platelet counts above 1200 × 109/L explained by acquired von Willebrand syndrome. Sixteen months after diagnosis, therapy was switched to pegylated interferon and platelet counts could be stabilized without significant side effects.
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Affiliation(s)
- C Schneider
- Division of Pediatric Hematology/Oncology, Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - E Stutz-Grunder
- Division of Pediatric Hematology/Oncology, Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - S Lüer
- Division of Pediatric Hematology/Oncology, Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - P Keller
- Department of Hematology, University Hospital/Inselspital Bern and University of Bern, Bern, Switzerland
| | - J A Kremer Hovinga
- Department of Hematology, University Hospital/Inselspital Bern and University of Bern, Bern, Switzerland
| | - R A Ammann
- Division of Pediatric Hematology/Oncology, Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - A Karow
- Division of Pediatric Hematology/Oncology, Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
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Brückner C, Straube E, Petersen I, Sachse S, Keller P, Layher F, Matziolis G, Spiegl U, Zajonz D, Edel M, Roth A. Low-grade infections as a possible cause of arthrofibrosis after total knee arthroplasty. Patient Saf Surg 2019; 13:1. [PMID: 30647774 PMCID: PMC6327456 DOI: 10.1186/s13037-018-0181-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 12/11/2018] [Indexed: 12/20/2022] Open
Abstract
Purpose Arthrofibrosis after total knee arthroplasty represents a considerable burden for the patient and a therapeutic challenge for the practitioner. One possible cause discussed in the literature is a low-grade infection. This hypothesis should be examined within the scope of this retrospective study. Patients and methods Nineteen patients with clinical symptoms of arthrofibrosis after primary total knee arthroplasty were examined between January, 1999 and January, 2012. Incorrect positioning was radiologically ruled out. All patients were examined clinically (score of Freeman as well as Blauth and Jäger), radiologically (component and leg alignment, patella height according to Insall and Salvati), microbiologically (culture-based procedures), molecular biologically (PCR) and histologically in the course of an open revision of the prosthesis. Results According to the score of Freeman et al. (1977), a highly significant improvement in pain (p = 0.007) and in the overall score (p = 0.003) was shown. The knee joint mobility did not change significantly (p = 0.795). PCR was negative in 17 patients. One patient showed a PCR-positive result of the synovial membrane for Corynebacterium spp., while Staphylococcus warneri was detected in the culture. Another patient had a positive result of synovia PCR for Enterococcus cecorum as well as Corynebacterium spp. However, this culture was sterile. In 16 patient samples, no bacterial growth was detectable. Two samples were not evaluable. The main histopathological findings were synovialitis and fibrosis. Conclusion The hypothesis of low-grade-infection-induced arthrofibrosis after total knee arthroplasty could not be confirmed in this study. However, based on this small study population the conclusion needs to be confirmed by new and larger studies, ideally prospectively designed including a control group.
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Affiliation(s)
- C Brückner
- Orthopaedic Professorship of the University Hospital Jena, Orthopaedic Department of the Waldkliniken Eisenberg, Eisenberg, Germany
| | - E Straube
- 2Institute of Medical Microbiology, Friedrich-Schiller-University Jena, Jena, Germany
| | - I Petersen
- 3Institute of Pathology, Friedrich-Schiller-University Jena, Jena, Germany.,4Institute of Pathology, SRH Waldklinikum Gera, Gera, Germany
| | - S Sachse
- 2Institute of Medical Microbiology, Friedrich-Schiller-University Jena, Jena, Germany
| | - P Keller
- 2Institute of Medical Microbiology, Friedrich-Schiller-University Jena, Jena, Germany.,5Institute of Medical Microbiology, University of Zurich, Zurich, Switzerland
| | - F Layher
- Orthopaedic Professorship of the University Hospital Jena, Orthopaedic Department of the Waldkliniken Eisenberg, Eisenberg, Germany
| | - G Matziolis
- Orthopaedic Professorship of the University Hospital Jena, Orthopaedic Department of the Waldkliniken Eisenberg, Eisenberg, Germany
| | - U Spiegl
- 6Department of Orthopaedics, Traumatology and Plastic Surgery, University Hospital Leipzig, Leipzig, Germany
| | - D Zajonz
- 6Department of Orthopaedics, Traumatology and Plastic Surgery, University Hospital Leipzig, Leipzig, Germany
| | - M Edel
- ZESBO - Center for research on musculoskeletal systems, Leipzig, Germany
| | - A Roth
- Orthopaedic Professorship of the University Hospital Jena, Orthopaedic Department of the Waldkliniken Eisenberg, Eisenberg, Germany.,6Department of Orthopaedics, Traumatology and Plastic Surgery, University Hospital Leipzig, Leipzig, Germany.,8Klinik und Poliklinik für Orthopädie, Unfallchirurgie und Plastische Chirurgie, Bereich Endoprothetik/Orthopädie, Universitätsklinikum Leipzig AöR, Liebigstraße 20, 04103 Leipzig, Germany
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Gerber V, Dimitrov B, Greigert V, Mohseni M, Pelami GM, David P, Keller P, Martinot M. Analyse clinique, microbiologique et thérapeutique des infections de prothèse abdominale. Med Mal Infect 2018. [DOI: 10.1016/j.medmal.2018.04.211] [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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Chen L, Wu J, Keller P, Jimenez P, Bukulmez O, Word A. Preovulatory serum from IVF protocols alters early decidualization in endometrial stromal cells. Fertil Steril 2017. [DOI: 10.1016/j.fertnstert.2017.07.1073] [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]
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Girard B, Piaton JM, Keller P, Abadie C, Nguyen TH. Botulinum neurotoxin injection for the treatment of epiphora in nasolacrimal duct obstruction. J Fr Ophtalmol 2017; 40:661-665. [PMID: 28847443 DOI: 10.1016/j.jfo.2017.03.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 03/16/2017] [Accepted: 03/17/2017] [Indexed: 10/19/2022]
Abstract
PURPOSE Retrospective long-term study to evaluate the efficacy of botulinum neurotoxin A (BoNT/A) therapy for epiphora due to non-surgical nasolacrimal duct obstruction. INTRODUCTION BoNT/A has been used successfully since 2000 in axillary hyperhidrosis to reduce secretory disorders. Some isolated cases of hyperlacrimation or crocodile tear syndrome have been treated on this basis. We used BoNT/A to decrease lacrimal secretion in cases of epiphora. METHODS We reviewed the qualitative and quantitative degree of improvement of epiphora after botulinum neurotoxin injections in the palpebral lobe of the lacrimal gland, carried out in an ophthalmic centre between 2009 and 2016. Epiphora was graded using a questionnaire, Munk scores and Schirmer tests before and after injections. Severity of side effects was recorded. RESULTS Twenty-seven palpebral lacrimal glands of twenty patients with epiphora, mean age 65±13, were treated with BoNT/A (Botox® or Xeomin®) from April 2009 to April 2016. The epiphora was induced by persistent nasolacrimal duct stenosis after surgical treatment. No conventional medical nor surgical treatment was effective at this time. The technique of injection, dilution and dosage were specific. We re-injected 14/27 cases on an as-needed basis, 7/27 cases three times, 3/27 cases four times, and 2/27 cases (same patient both glands) five times. The Schirmer test measured a decrease of lacrimal secretion in 24/27 (89%) lacrimal glands after neurotoxin injection. Side effects were ptosis in 4 cases and transient esotropia in 2 cases. The authors describe the injection techniques, the dosage, the volume and concentration of BoNT/A. CONCLUSION Patients with epiphora can be treated effectively with BoNT/A to reduce lacrimal secretion of the principal lacrimal gland in its palpebral portion. Ninety percent of the patients were very satisfied, with few side effects (ptosis or mild diplopia lasting from 3 days to 3 weeks). More studies are needed to delineate which types of epiphora can be treated with BoNT/A.
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Affiliation(s)
- B Girard
- Department of Ophthalmology, Hospital Tenon, GHU Est-Parisien, 4, rue de la Chine, 75970 Paris cedex 20, France; Department V of Ophthalmology, Quinze-Vingts National Hospital of Ophthalmology, 28, rue de Charenton, 75012 Paris, France.
| | - J-M Piaton
- Department IV of Ophthalmology, Quinze-Vingts National Hospital of Ophthalmology, 28, rue de Charenton, 75012 Paris, France
| | - P Keller
- Department IV of Ophthalmology, Quinze-Vingts National Hospital of Ophthalmology, 28, rue de Charenton, 75012 Paris, France
| | - C Abadie
- Department of Ophthalmology, CHU Caen, 14003 Caen, France
| | - T H Nguyen
- Department of Neuroradiology, Quinze-Vingts National Hospital of Ophthalmology, 28, rue de Charenton, 75012 Paris, France
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Schoenberg N, Brown R, Hansen A, Bi S, Keller P. PROTECTIVE FACTORS IN VULNERABLE, RURAL OLDER ADULTS: LINKS WITH SALIVARY MARKERS OF INFLAMMATION. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.1148] [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: 11/13/2022] Open
Affiliation(s)
- N.E. Schoenberg
- Behavioral Science, University of Kentucky, Lexington, Kentucky
| | - R.L. Brown
- Behavioral Science, University of Kentucky, Lexington, Kentucky
| | - A. Hansen
- Behavioral Science, University of Kentucky, Lexington, Kentucky
| | - S. Bi
- Behavioral Science, University of Kentucky, Lexington, Kentucky
| | - P. Keller
- Behavioral Science, University of Kentucky, Lexington, Kentucky
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Elsey TL, Keller P. 0053 AGE AND GENDER DIFFERENCES IN SLEEP HYGIENE IN MIDDLE CHILDHOOD. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Böhm I, Nairz K, Endrich O, Hasembank S, Keller P, Heverhagen J. Sind sog. „breakthrough“ Reaktionen (BTR) nach Prämedikation bei Kontrastmittelallergie eine Kontraindikation für Kontrastmittel? ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600320] [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: 10/19/2022]
Affiliation(s)
- I Böhm
- Inselspital, Universität Bern, Universitätsinstitut für Diagnostische, Interventionelle und Pädiatrische Radiologie, Bern
| | - K Nairz
- Inselspital, Universität Bern, Universitätsinstitut für Diagnostische, Interventionelle und Pädiatrische Radiologie, Bern
| | - O Endrich
- Inselspital, Universität Bern, Operatives Medizincontrolling, Bern
| | - S Hasembank
- Inselspital, Universität Bern, Universitätsinstitut für Diagnostische, Interventionelle und Pädiatrische Radiologie, Bern
| | - P Keller
- Inselspital, Universität Bern, Universitätsinstitut für Diagnostische, Interventionelle und Pädiatrische Radiologie, Bern
| | - J Heverhagen
- Inselspital, Universität Bern, Universitätsinstitut für Diagnostische, Interventionelle und Pädiatrische Radiologie, Bern
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Etienne O, Picart C, Taddei C, Keller P, Hubsch E, Schaaf P, Voegel JC, Haikel Y, Ogier JA, Egles C. Polyelectrolyte Multilayer Film Coating and Stability at the Surfaces of Oral Prosthesis Base Polymers: an in vitro and in vivo Study. J Dent Res 2016; 85:44-8. [PMID: 16373679 DOI: 10.1177/154405910608500107] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [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: 11/16/2022] Open
Abstract
A new type of coating involving a layer-by-layer technique has been recently reported. This coating is composed of a polyelectrolyte multilayer film that confers specific properties on surfaces to which it is applied. Here, we studied the applicability of such a technique to the coating of oral prostheses, by first testing the construction of polyelectrolyte multilayer films on several polymers used in oral prosthesis bases, and, subsequently, by studying the stability of these coatings in vitro, in human saliva, and in vivo in a rat model. We demonstrated that the multilayered films are able to coat the surfaces of all tested polymers completely, thus increasing their wettability. We also showed that saliva does not degrade the film after 7 days in vitro and after 4 days in vivo. Taken together, our results establish that the layer-by-layer technique is suitable for the coating of oral devices.
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Affiliation(s)
- O Etienne
- Institut National de la Santé et de la Recherche Médicale, Unité 595, 11, rue Humann, 67085 Strasbourg Cedex, France
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Keller P, Dufourni A, Van de Velde M, Bauwens C, Van Loon G. Phenylephrine-induced epistaxis in a six-year-old Quarter horse with nephrosplenic entrapment. VLAAMS DIERGEN TIJDS 2016. [DOI: 10.21825/vdt.v85i3.16343] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Left dorsal displacement of the large colon is a common cause of colic in horses. Treatment consists of surgery, rolling the horse under general anesthesia or intravenous administration of phenylephrine. Treatment with phenylephrine, an α1-adrenergic drug, is often associated with sweating and trembling. Especially in horses of more than 15 years old, fatal hemorrhage may occur due to hemothorax or hemoperitoneum. Therefore, phenylephrine treatment is generally not given in horses over 15 years of age. In this report, severe epistaxis in a six-year-old Quarter horse is described after intravenous administration of 22.5 μg/kg BW phenylephrine, and it is highlighted that hemorrhage may also occur in younger horses.
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Bellon M, Keller P, Baltes C, Chetty IJ, Gordon JJ. TH-CD-304-01: Evaluating the Accuracy of Absolute Portal Dosimetry On the EDGE Linear Accelerator. Med Phys 2015. [DOI: 10.1118/1.4926207] [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: 11/07/2022] Open
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Miri N, Baltes C, Keller P, Greer P. SU-E-T-265: Development of Dose-To-Water Conversion Models for Pre-Treatment Verification with the New AS1200 Imager. Med Phys 2015. [DOI: 10.1118/1.4924627] [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: 11/07/2022] Open
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Guler S, Brunner-Agten S, Bartenstein S, Bettschen HU, Geiser T, Keller P, Funke M. An asymptomatic swiss army professional with an oxygen saturation of 75% – a case report. Pneumologie 2015. [DOI: 10.1055/s-0035-1551924] [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: 10/23/2022]
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Oehlert W, Keller P, Henke M, Strauch M. Gastric mucosal dysplasia: what is its clinical significance? Front Gastrointest Res 2015; 4:173-82. [PMID: 428890 DOI: 10.1159/000402299] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Novembre G, Ticini L, Schütz-Bosbach S, Keller P. P 38. Motor simulation coordinates joint actions in real time: Music performance meets on-line double-pulse TMS. Clin Neurophysiol 2013. [DOI: 10.1016/j.clinph.2013.04.116] [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: 11/25/2022]
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Hagel S, Stallmach A, Keller P, Pletz M. Multiresistente Erreger. Zentralbl Chir 2013; 140:417-25. [DOI: 10.1055/s-0032-1328343] [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: 10/26/2022]
Affiliation(s)
- S. Hagel
- Zentrum für Infektionsmedizin und Krankenhaushygiene, FSU Jena, Deutschland
| | - A. Stallmach
- KIM IV, Abteilung für Gastroenterologie, Hepatologie und Infektiologie, FSU Jena, Deutschland
| | - P. Keller
- Institut für Medizinische Mikrobiologie, FSU Jena, Deutschland
| | - M. Pletz
- Zentrum für Infektionsmedizin und Krankenhaushygiene, FSU Jena, Deutschland
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Hentschel J, Jäger M, Beiersdorf N, Doht F, Michl R, Markert U, Böer K, Keller P, Pletz M, Mainz J. WS5.5 Impact of antibiotic treatment on concentration of pro-inflammatory cytokines in nasal lavages of CF patients. J Cyst Fibros 2013. [DOI: 10.1016/s1569-1993(13)60029-6] [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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O'Hara PD, Serra-Sogas N, Canessa R, Keller P, Pelot R. Estimating discharge rates of oily wastes and deterrence based on aerial surveillance data collected in western Canadian marine waters. Mar Pollut Bull 2013; 69:157-164. [PMID: 23453813 DOI: 10.1016/j.marpolbul.2013.01.034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2012] [Revised: 01/24/2013] [Accepted: 01/29/2013] [Indexed: 06/01/2023]
Abstract
Illegal discharge of waste oil from ships is a major source of mortality for seabirds globally. Using linear and log-linear regression, we explored the relationship between detection rates of marine oily discharges and surveillance effort at different time scales, based on data collected in the Canadian Pacific Ocean by the National Aerial Surveillance Program (NASP) from 1997 to 2006. We introduce an approach for quantifying reductions in discharge rates with increased surveillance while controlling appropriately for surveillance effort, as standard linear correction for effort can introduce considerable bias. Despite low probabilities of detection (0.088-1.1%), we found evidence for reduced discharge rates with increasing surveillance effort for data summarized monthly and bimonthly in region A, which is closest to the NASP base airport. Using residuals derived from the best-fit log-linear models, we found detected discharge rates declined annually (-[0.070 spills/month]×year).
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Affiliation(s)
- P D O'Hara
- Canadian Wildlife Service, Environment Canada, c/o Institute of Ocean Sciences, 9860 W. Saanich Rd., Sidney, BC, Canada V8L 4B2.
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Ghanem H, Hagel S, Keller P, Prochnau D, Stallmach A, Pletz MW. [A 22-year-old patient from Ghana with fever and reduced CD4 T-cell count]. Internist (Berl) 2013; 54:100-4. [PMID: 23318543 DOI: 10.1007/s00108-012-3159-6] [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: 10/27/2022]
Abstract
A 22-year-old patient from Ghana without relevant co-morbidities was admitted twice with fever of unknown origin and reduced CD4 T-cell count. During the second hospital stay, after prolonged incubation of blood cultures and detection of vegetations on the mitral valve in a transesophageal echocardiogram, infectious endocarditis with Aggregatibacter aphrophilus was diagnosed. Treatment according to European guidelines resulted in resolution of the fever, dissolution of the mitral valve vegetations and recovery of CD4 T-cell count.
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Affiliation(s)
- H Ghanem
- Klinik für Innere Medizin II, Abteilung für Gastroenterologie, Hepatologie und Infektiologie, Universitätsklinikum Jena, Deutschland
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Steiger A, Stucki F, Peyer N, Keller P. Zur Beurteilung von Tierschutzaspekten bei Extremzuchten von Hunden und Katzen. SCHWEIZ ARCH TIERH 2012; 150:217-25. [DOI: 10.1024/0036-7281.150.5.217] [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: 11/19/2022]
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31
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Bricogne G, Vonrhein C, Keller P, Thompson A, Legrand P, Cambillau C, Spinelli S, Antonyuk S, Pastok M, Elliott P. Classical-style MAD phasing with wavelength interleaving and kappa goniometry on PROXIMA-1. Acta Crystallogr A 2012. [DOI: 10.1107/s0108767312099655] [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: 04/03/2023] Open
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Smart OS, Sharff A, Flensburg C, Keller P, Paciorek W, Vonrhein C, Womack TO, Bricogne G. Better ligand representation inBUSTERprotein–complex structure determination. Acta Crystallogr A 2012. [DOI: 10.1107/s0108767312099618] [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: 11/10/2022] Open
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Vonrhein C, Smart OS, Sharff A, Flensburg C, Keller P, Paciorek W, Womack TO, Bricogne G. Improving the quality of protein–ligand complex structures. Acta Crystallogr A 2012. [DOI: 10.1107/s0108767312098303] [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: 11/10/2022] Open
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34
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Hermansen MLF, Hummelshøj L, Lundsgaard D, Hornum L, Keller P, Fleckner J, Fox B, Poulsen LK, Jacobsen S. Increased serum β2-microglobulin is associated with clinical and immunological markers of disease activity in systemic lupus erythematosus patients. Lupus 2012; 21:1098-104. [DOI: 10.1177/0961203312447668] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The objective of this study was to explore the relationship between serum levels of β2-microglobulin (β2MG), which some studies suggest reflect disease activity in systemic lupus erythematosus (SLE), and various clinical and immunological markers of disease activity in SLE. Twenty-six SLE patients and 10 healthy controls were included. Disease activity was assessed by: SLEDAI, 24 hr-proteinuria, circulating levels of complement C3, anti-double-stranded DNA (anti-dsDNA), β2MG and various pro-inflammatory and anti-inflammatory cytokines (IL-6, IL-8, IL-10, IL-18) measured with a multiplex assay, IFN-α assessed with a reporter gene assay, and a combined expression score of 12 IFN-α inducible genes in peripheral blood mononuclear cells. Median serum levels of β2MG were significantly higher in SLE patients vs controls (2.8 mg/L, range: 1.1–21.6 and 1.2 mg/L, range: 0.9–1.7, respectively, p < 0.001). β2MG was correlated with SLEDAI score ( R = 0.68, p < 0.001), 24 hr-proteinuria ( R = 0.64, p < 0.001), and complement C3 ( R = −0.52, p = 0.007). The cytokines were significantly correlated with β2MG: IL-6 ( R = 0.45, p = 0.02), IL-8 ( R = 0.75, p < 0.001), IL-10 ( R = 0.67, p < 0.001) and IL-18 ( R = 0.71, p < 0.001) as were serum IFN-α ( R = 0.45, p = 0.02) and the IFN-α inducible gene-score ( R = 0.51, p = 0.01). The results support that β2MG may serve as a marker of disease activity in SLE. The correlations with the measured cytokines indicate that increased β2MG in SLE reflects immunological activity.
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Affiliation(s)
- M-LF Hermansen
- Department of Rheumatology, Rigshospitalet, Copenhagen University Hospital, Denmark
| | - L Hummelshøj
- Laboratory for Medical Allergology, Copenhagen University Hospital Gentofte, Denmark
| | | | - L Hornum
- Novo Nordisk A/S, Måløv, Denmark
| | - P Keller
- Novo Nordisk A/S, Måløv, Denmark
| | | | - B Fox
- Novo Nordisk A/S, Seattle, USA
| | - LK Poulsen
- Laboratory for Medical Allergology, Copenhagen University Hospital Gentofte, Denmark
| | - S Jacobsen
- Department of Rheumatology, Rigshospitalet, Copenhagen University Hospital, Denmark
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Schleenvoigt B, Keller P, Stallmach A, Pletz M. Afrikanisches Zeckenbissfieber - Rickettsiose nach Urlaub in Südafrika. Dtsch Med Wochenschr 2012; 137:891-3. [DOI: 10.1055/s-0032-1304902] [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: 10/28/2022]
Affiliation(s)
- B. Schleenvoigt
- Abteilung für Gastroenterologie, Hepatologie und Infektiologie, Klinik für Innere Medizin II, Universitätsklinikum Jena/Friedrich-Schiller-Universität Jena
| | - P. Keller
- Institut für Medizinische Mikrobiologie, Universitätsklinikum Jena/Friedrich-Schiller-Universität Jena
| | - A. Stallmach
- Abteilung für Gastroenterologie, Hepatologie und Infektiologie, Klinik für Innere Medizin II, Universitätsklinikum Jena/Friedrich-Schiller-Universität Jena
| | - M. Pletz
- Abteilung für Gastroenterologie, Hepatologie und Infektiologie, Klinik für Innere Medizin II, Universitätsklinikum Jena/Friedrich-Schiller-Universität Jena
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Itoh H, Keller P, Word R. Effect of estradiol and transforming growth factor beta 1(TGFβ1) on expression of lysyl oxidase(LOX) in three-dimensional (3D) cocultures of human endometrium. Fertil Steril 2011. [DOI: 10.1016/j.fertnstert.2011.07.568] [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: 11/26/2022]
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37
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Smart OS, Womack TO, Flensburg C, Keller P, Paciorek W, Sharff A, Vonrhein C, Bricogne G. Better ligand representation inBUSTERprotein–complex structure determination. Acta Crystallogr A 2011. [DOI: 10.1107/s010876731109670x] [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: 11/10/2022] Open
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38
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Baraton MI, Merhari L, Keller P, Zweiacker K, Meyer JU. Novel Electronic Conductance CO2 Sensors Based on Nanocrystalline Semiconductors. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-536-341] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractWe have recently demonstrated that screen-printed sensors using a 20 nm- instead of microsized BaTiO3-CuO-additives powder exhibit up to one order of magnitude higher sensitivity to CO2. In this paper, we focus on both the surface chemistry of the nano-BaTiO3- CuO-additives powder (mix-BaTiO3) and electrical changes during O2 and CO2 adsorptions. We show by Fourier transform infrared (FTIR) spectrometry, thus without using electrodes, that the mix-BaTiO3 system behaves like a p-type semiconductor at the operating temperature. The variations of the electrical conductivity versus CO2 concentrations are followed in situ by FTIR spectrometry and prove to be dependent on the surrounding oxygen. These IR results are then correlated to the electrical measurements performed on the sensor. Preliminary electrical response modelling shows a good agreement with the surface barrier layer theory.
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Heimgartner B, Oestmann A, Keller P, Rüsges-Wolter I. [Spontaneous hematomas and isolated prolongation of aPTT]. Praxis (Bern 1994) 2011; 100:603-606. [PMID: 21563098 DOI: 10.1024/1661-8157/a000532] [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] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We report a case of a 64 year old woman with spontaneous hematomas. A prior history of bleeding disorder was not known up to now. The result of investigation of coagulation was an isolated prolonged aPTT that was caused by an inhibitor of factor VIII without underlying disease (idiopathic acquired hemophilia A). Therapy with steroids and cyclophosphamid resulted in partial remission.
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Affiliation(s)
- B Heimgartner
- Universitätsklinik für Allgemeine Innere Medizin, Inselspital, Universitätsspital Bern, Freiburgstrase 10, 3010 Bern.
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Pépy G, Cotton J, Hardouin F, Keller P, Lambert M, Moussa F, Noirez L, Lapp A, Strazielle C. Liquid crystal polymers: Studies of labelled parts by Neutron scattering. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.19880150120] [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: 11/06/2022]
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41
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Anikpeh YF, Keller P, Bloemberg GV, Grünenfelder J, Zinkernagel AS. Spacecraft bacterium, Paenibacillus pasadenensis, causing wound infection in humans. BMJ Case Rep 2010; 2010:2010/dec21_1/bcr0620103058. [PMID: 22802471 DOI: 10.1136/bcr.06.2010.3058] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
In a patient with mediastinitis after cardiac surgery Paenibacillus pasadenensis was detected in his sternal wound. Paenibacilli are gram-positive, aerobic, bacteria related to bacilli. Until recently these organisms were not known to cause human disease. A few cases of human infection caused by another member of this genus, P alvei, have been reported. The authors describe the first infection with P pasadenensis in humans. P pasadenensis was detected by broad-range bacterial 16S rRNA PCR. Treatment consisted of surgical debridement and antibiotics, vancomycin and ciprofloxacin followed by clindamycin and ciprofloxacin, resulting in complete recovery.
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Affiliation(s)
- Y Flammer Anikpeh
- Division of Infectious Diseases, University Hospital Zurich, Zurich, Switzerland. yvonne.fl
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Itoh H, Keller P, Mogami H, Lindqvist A, Word R. Progesterone and transforming growth factor beta 1 (TGFB1) regulate matrix metalloproteinases (MMPS) in human endometrium. Fertil Steril 2010. [DOI: 10.1016/j.fertnstert.2010.07.830] [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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Keller P, Romain B, Nicolae MA, Perrin P, Meyer C. [Is laparoscopic gastric bypass a dangerous procedure during the early phase of the learning curve? A prospective study of the first 50 cases]. ACTA ACUST UNITED AC 2009; 146:373-81. [PMID: 19766214 DOI: 10.1016/j.jchir.2009.08.020] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND Among the various bariatric procedures, laparoscopic Roux-en-Y gastric bypass (LRYGBP) is widely considered to be the gold standard. However, a majority of bariatric surgeons in France do not perform LFYGBP, perhaps because of its reputation as a technically demanding procedure with a long learning curve. This study evaluates the outcomes and the learning curve for the first 50 LFYGBP performed by one surgeon in a French non-university hospital. MATERIAL AND METHOD Between April 2007 and February 2009, we performed our first 50 cases of LRYGBP. Surgical outcomes and the learning curve were measured by prospective criteria including length of stay, operative time, complications, percentage weight loss and reduction of obesity-related co-morbidities. RESULTS The mean patient age was 41.8+/-9.8 years. The mean BMI was 47.7+/-7.1 kg/m(2). The mean operative time was 146+/-51 minutes and the mean hospital stay was 5.3+/-1.4 days. Three cases (6%) were converted to open surgery. Early complications occurred in 4% and late complications occurred in 6%. The average follow-up was 6.3+/-1.3 months. Overall excess weight loss was 39.5, 50, 62, and 63% at 3, 6, 9, and 12 months. CONCLUSION LRYGBP can be performed with acceptable morbidity and short-term results, even during the early phase of a surgeon's learning curve. It is a feasible procedure for bariatric surgeons with previous experience in gastric banding.
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Affiliation(s)
- P Keller
- Département de chirurgie, hôpital Pasteur, hôpitaux civils de Colmar, 39, avenue de la Liberté, 68024 Colmar cedex, France.
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Keller P. Über Säuglingspneumonieformen im Röntgenbild. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1232543] [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: 10/20/2022]
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45
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Schmitz E, Martin E, Keller P. Grundlagen der Venenpunktion. Transfus Med Hemother 2009. [DOI: 10.1159/000219732] [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: 11/19/2022] Open
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46
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Kissling M, Keller P, Fernex M. Effect of 5-Fluorocytosine in Comparison with Amphotericin B and/or 5-Fluorouracil on the Formation of Human Mature Bursts/Colonies of Haemopoietic Progenitor Cells/Der Einfluß von 5-Fluorcytosin im Vergleich mit Amphotericin B und/oder 5-Fluoruracil auf. Mycoses 2009. [DOI: 10.1111/j.1439-0507.1988.tb03863.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [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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47
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Purucker M, Keller P, Rätzel-Kürzdörfer W, Wolfersdorf M. Sozialmedizinische Begutachtung psychosomatischer Störungen: Qualitätssicherung durch interdisziplinäre psychodynamische, testpsychologische und ergotherapeutische Diagnostik. Psychother Psychosom Med Psychol 2009. [DOI: 10.1055/s-0029-1208253] [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]
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Keller P, McCarthy K, Mosendane T, Tellie M, Venter F, Noble L, Scott L, Stevens W, van Rie A. HIV prevalence among medical students in Johannesburg, South Africa. S Afr Med J 2009; 99:72. [PMID: 19418661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
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49
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Keller P, Gupta PB, Klebba I, Gilmore H, Come S, Schnitt S, Lander ES, Kuperwasser C. Breast epithelial differentiation is altered in BRCA1mut/+ carriers prior to the onset of cancer and contributes to the basal tumor phenotype. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-3083] [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
Abstract #3083
Human breast tumors are broadly divided into either luminal-like or basal-like cancers. This distinction is significant since basal-like tumors are more aggressive and afford a poor patient prognosis relative to luminal-like tumors. For reasons that are unclear, germline mutations in BRCA1 strongly predispose for poor prognosis basal-like tumors. The predisposition for basal-like tumors in BRCA1mut/+ patients could be due to (1) differences in underlying target cell populations between BRCA1mut/+ and BRCA1+/+ women or (2) differences in the genetic mutations arising within a single shared target cell type. This basic question has remained unresolved due to a lack of experimental models in which it can be addressed. We describe here a novel in vivo breast cancer system that enables the generation of tumors by introducing oncogenes into normal breast epithelium derived directly from human breast tissue. This system is unique in that it enables human-derived epithelial cells to be sorted for cell surface markers and transformed without requiring in vitro culture prior to implantation in vivo. Using this experimental system, we show that epithelial cells from BRCA1mut/+ patients give rise to tumors that exhibit multiple features of basal differentiation, in contrast to epithelial cells transformed with identical oncogenes from BRCA1+/+ patients. We show further that non-cancerous epithelial cells from BRCA1mut/+ patients already exhibit atypical differentiation even prior to the onset of cancer, in contrast to cells from BRCA1+/+ women. Remarkably, some of these differences are observable in the context of unperturbed breast tissue obtained from disease-free BRCA1mut/+ and BRCA1+/+ patients. Collectively, these findings show that the increased incidence of basal-like tumors in BRCA1mut/+ patients is a reflection of the altered differentiation of breast epithelial cells in BRCA1mut/+ patients.
Citation Information: Cancer Res 2009;69(2 Suppl):Abstract nr 3083.
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Affiliation(s)
- P Keller
- 1 Department of Anatomy & Cellular Biology, Sackler School, Tufts University School of Medicine, Boston, MA
- 2 Molecular Oncology Research Institute, Tufts Medical Center, Boston, MA
| | - PB Gupta
- 3 Department of Biology, MIT and Broad Institute of MIT and Harvard, Cambridge, MA
| | - I Klebba
- 1 Department of Anatomy & Cellular Biology, Sackler School, Tufts University School of Medicine, Boston, MA
- 2 Molecular Oncology Research Institute, Tufts Medical Center, Boston, MA
| | - H Gilmore
- 4 Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA
| | - S Come
- 5 Department of Medicine, Harvard Medical School, Beth Israel Deaconess Medical Center, Boston, MA
| | - S Schnitt
- 4 Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA
| | - ES Lander
- 3 Department of Biology, MIT and Broad Institute of MIT and Harvard, Cambridge, MA
- 6 Whitehead Institute for Biomedical Research, Cambridge, MA
- 7 Department of Systems Biology, Harvard Medical School, Boston, MA
| | - C Kuperwasser
- 1 Department of Anatomy & Cellular Biology, Sackler School, Tufts University School of Medicine, Boston, MA
- 2 Molecular Oncology Research Institute, Tufts Medical Center, Boston, MA
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Grosgurin O, Rutschmann O, Plojoux J, Keller P, Niquille M, Nkoulou R, Sarasin F. 153: Out-of-Hospital Emergency Physician Activation of Interventional Cardiology Team Reduces Door-to-Balloon Time in ST-Elevation Myocardial Infarction. Ann Emerg Med 2008. [DOI: 10.1016/j.annemergmed.2008.06.170] [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: 12/01/2022]
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