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Boske ECE, Nienhuis PH, Hammer C, Jalving M, Kruyt FAE, de Vries J, Roodenburg JLN, Metman MJH, Kruijff S. The Summer School Oncology Groningen: Improving a Successful International Course by Refining the Old, Maintaining What's Good. J Cancer Educ 2022; 37:1228-1235. [PMID: 33523406 PMCID: PMC9399066 DOI: 10.1007/s13187-020-01944-6] [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] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Accepted: 12/14/2020] [Indexed: 06/12/2023]
Abstract
For more than two decades, the International Summer School Oncology for Medical Students (ISOMS) has organized a biennial 2-week international summer school program in Groningen, the Netherlands. The summer school aims to increase knowledge about general cancer care, reduce fear of talking to cancer patients, and expose students to cancer-related problems. After 22 years, there was a need to improve the summer school format, the application procedure, and the intensity of the course. Here, we describe and evaluate these and additional changes that were made to the program. Several changes were made to the summer school format. The course was shortened from 10 days to a more intensive 7 days. The scientific program was integrated with the clinical program and students were taught scientific writing and presentation skills. The application process involved a personal video pitch. Importantly, the new summer school format was organized by a committee in which medical students had the lead. To evaluate the changes to the summer school, we conducted knowledge tests and regularly obtained feedback. There was a high overall student satisfaction, with a median score of a 9 out of 10. Students appreciated the interactive sessions and practicals and the scientific program, and were satisfied with the course level. All students had improved test scores. Improvement points highlighted the need for a less packed schedule and more lectures on basic oncology principles, or were related to specific lectures. The student-led innovation and adaptation of the ISOMS has been successful.
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Affiliation(s)
- E C E Boske
- Faculty of Medical Sciences, University of Groningen, Groningen, The Netherlands
| | - P H Nienhuis
- Faculty of Medical Sciences, University of Groningen, Groningen, The Netherlands
| | - C Hammer
- Department of Radiation Oncology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - M Jalving
- Department of Medical Oncology, University Medical Center Groningen, Groningen, The Netherlands
| | - F A E Kruyt
- Department of Medical Oncology, University Medical Center Groningen, Groningen, The Netherlands
| | - J de Vries
- Department of Surgery, University Medical Center Groningen, Groningen, The Netherlands
| | - J L N Roodenburg
- Department of Maxillofacial Surgery, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - M J H Metman
- Department of Surgical Oncology, University Medical Center Groningen, Groningen, The Netherlands
| | - S Kruijff
- Department of Surgical Oncology, University Medical Center Groningen, Groningen, The Netherlands.
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Hodel F, Chong AY, Scepanovic P, Xu ZM, Naret O, Thorball CW, Rüeger S, Marques-Vidal P, Vollenweider P, Begemann M, Ehrenreich H, Brenner N, Bender N, Waterboer T, Mentzer AJ, Hill AVS, Hammer C, Fellay J. Human genomics of the humoral immune response against polyomaviruses. Virus Evol 2021; 7:veab058. [PMID: 34532061 PMCID: PMC8438875 DOI: 10.1093/ve/veab058] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 04/30/2021] [Accepted: 06/09/2021] [Indexed: 12/21/2022] Open
Abstract
Human polyomaviruses are widespread in humans and can cause severe disease in immunocompromised individuals. To identify human genetic determinants of the humoral immune response against polyomaviruses, we performed genome-wide association studies and meta-analyses of qualitative and quantitative immunoglobulin G responses against BK polyomavirus (BKPyV), JC polyomavirus (JCPyV), Merkel cellpolyomavirus (MCPyV), WU polyomavirus (WUPyV), and human polyomavirus 6 (HPyV6) in 15,660 individuals of European ancestry from three independent studies. We observed significant associations for all tested viruses: JCPyV, HPyV6, and MCPyV associated with human leukocyte antigen class II variation, BKPyV and JCPyV with variants in FUT2, responsible for secretor status, MCPyV with variants in STING1, involved in interferon induction, and WUPyV with a functional variant in MUC1, previously associated with risk for gastric cancer. These results provide insights into the genetic control of a family of very prevalent human viruses, highlighting genes and pathways that play a modulating role in human humoral immunity.
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Affiliation(s)
| | - A Y Chong
- The Wellcome Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford OX3 7BN, United Kingdom
| | - P Scepanovic
- Roche Pharmaceutical Research and Early Development, F. Hoffmann-La Roche Ltd, Headquarters Grenzacherstrasse 124, CH-4070 Basel, Switzerland
| | - Z M Xu
- Global Health Institute, School of Life Sciences, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland,Swiss Institute of Bioinformatics, Quartier UNIL-Sorge, CH-1015 Lausanne, Switzerland
| | - O Naret
- Global Health Institute, School of Life Sciences, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland,Swiss Institute of Bioinformatics, Quartier UNIL-Sorge, CH-1015 Lausanne, Switzerland
| | - C W Thorball
- Global Health Institute, School of Life Sciences, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland,Precision Medicine Unit, Lausanne University Hospital and University of Lausanne, Rue du Bugnon 46, CH-1011 Lausanne, Switzerland
| | - S Rüeger
- Institute for Molecular Medicine Finland, Institute of Life Science HiLIFE, University of Helsinki, Haartmaninkatu 8, 00290 Helsinki, Finland
| | - P Marques-Vidal
- Department of Medicine, Internal Medicine, Lausanne University Hospital and University of Lausanne, Rue du Bugnon 46, CH-1011 Lausanne, Switzerland
| | | | - M Begemann
- Clinical Neuroscience, Max Planck Institute of Experimental Medicine, DFG Research Center for Nanoscale Microscopy and Molecular Physiology of the Brain, Hermann-Rein-Straße 3, 37075 Göttingen, Germany
| | - H Ehrenreich
- Clinical Neuroscience, Max Planck Institute of Experimental Medicine, DFG Research Center for Nanoscale Microscopy and Molecular Physiology of the Brain, Hermann-Rein-Straße 3, 37075 Göttingen, Germany
| | - N Brenner
- Infections and Cancer Epidemiology, German Cancer Research Center, Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - N Bender
- Infections and Cancer Epidemiology, German Cancer Research Center, Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - T Waterboer
- Infections and Cancer Epidemiology, German Cancer Research Center, Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | | | - A V S Hill
- The Wellcome Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford OX3 7BN, United Kingdom,The Jenner Institute, University of Oxford, Old Road Campus Research Build, Roosevelt Dr, Oxford OX1 2JD, United Kingdom
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Kumar L, Mahfooz Buksh M, Merali N, Hammer C, Nagendram S, Kenny R, Chakravartty S, Madan R. 416 Prospective Multicentre Study of Impact of COVID-19 on Colorectal Cancer Resections. Br J Surg 2021. [PMCID: PMC8135733 DOI: 10.1093/bjs/znab134.057] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Introduction COVID-19 pandemic has posed a major challenge to healthcare systems globally. In NHS, around 36,000 cancer operations have been estimated to be cancelled during the peak time alone. This regional study evaluated the risk of COVID-19 in patients undergoing surgery for colorectal cancer during the peak time. Method This prospective multicentre observational study conducted in four busy district hospitals included 52 patients with colorectal cancer who underwent surgery during the COVID lockdown period (23rd March to 5th May). PCR swab testing was used to detect COVID. Data was collected from patient notes, MDT files and pathology results. Results 73% (38/52) underwent elective procedures, 90% with curative intent. Overall, mean (SD) age was 70 (12.2) years, 50% were female. 60% (32/52) had left sided cancers and a total of 48% (25/52) patients had stage 3 or above. 27% (14/52) had post-operative complications, with 4% (2/52) being Grade 3 Clavien-Dindo. Total mortality was 6% (3/52) of which 1 was elective patient. Only one patient developed COVID infection during the inpatient stay. Conclusions Data suggests, local policies to prevent COVID spread have been effective. Local lockdown in case of second peak may be a reasonable option. Improvement in COVID testing could have major impact on outcomes.
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Affiliation(s)
- L Kumar
- Ashford and St Peter's Hospitals NHS Foundation Trust, Chertsey, United Kingdom
| | - M Mahfooz Buksh
- Ashford and St Peter's Hospitals NHS Foundation Trust, Chertsey, United Kingdom
| | - N Merali
- Royal Surrey NHS Foundation Trust, Guildford, United Kingdom
| | - C Hammer
- Royal Surrey NHS Foundation Trust, Guildford, United Kingdom
| | - S Nagendram
- Frimley Park Hospital, Frimley, United Kingdom
| | - R Kenny
- St Richard’s Hospital, Chichester, United Kingdom
| | | | - R Madan
- Ashford and St Peter's Hospitals NHS Foundation Trust, Chertsey, United Kingdom
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Curiale MS, Gangar V, Gravens C, Agin JR, Bound A, Bowles L, Brockman R, Brusatti L, Bulawka CE, Cohen A, Deeks C, Eklund CA, Fukuoka J, Gangar V, Hammer C, Harris L, Hoffman C, Jost-Keating K, Keng JG, Kerdahi K, Krzyanowski W, Manley D, Miller C, Mondon D, Neufang K, Niroomand F, Plante R, Post L, Roman M, Rude D, Raghubeer EV, Ryder J, Smith C, Stoltzner L, Thomas L, Vanderbilt B, Wright T. VIDAS Enzyme-Linked Fluorescent Immunoassay for Detection of Salmonella in Foods: Collaborative Study. J AOAC Int 2020. [DOI: 10.1093/jaoac/80.3.491] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
The VIDAS SLM method for detection of Salmonella was compared with the Bacteriological Analytical Manual (BAM)/AOAC culture method in a collaborative study. Twenty laboratories participated in the evaluation. Each laboratory tested one or more of 6 test products: milk chocolate, nonfat dry milk, dried whole egg, soy flour, ground black pepper, and ground raw turkey. No significant differences (P< 0.05) were observed between the 2 methods. The 2 methods were in agreement for 99% of 1544 samples analyzed. Of the 20 samples out of agreement, 8 were VIDAS SLM positive and BAM/AOAC negative, and 12 were VIDAS SLM negative and BAM/AOAC positive. The VIDAS SLM method for detection of Salmonella in foods has been adopted first action by AOAC INTERNATIONAL.
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Affiliation(s)
- Michael S Curiale
- Silliker Laboratories Group, Inc., Corporate Research Center, 160 Armory Dr, South Holland, IL 60473
| | - Vidhya Gangar
- Silliker Laboratories Group, Inc., Corporate Research Center, 160 Armory Dr, South Holland, IL 60473
| | - Carol Gravens
- bioMérieux Vitek, Inc., 595 Anglum Rd, Hazelwood, MO 63042-2320
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Gunkelman M, Ryan F, Keiper C, Hammer C. Thermography of the equine hoof immediately following trimming and shoeing. J Equine Vet Sci 2019. [DOI: 10.1016/j.jevs.2019.03.138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Gunkelman M, Nichols A, Hammer C. Acclimation of the equine distal limb following exposure to extreme cold. J Equine Vet Sci 2019. [DOI: 10.1016/j.jevs.2019.03.137] [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: 11/29/2022]
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7
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Gunkelman M, Young J, Hammer C. Influence of trimming and shoeing on hoof temperature and digital cushion thickness in mature horses. J Equine Vet Sci 2019. [DOI: 10.1016/j.jevs.2019.03.125] [Citation(s) in RCA: 1] [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: 12/01/2022]
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8
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Klinker P, Brouwer C, Roos C, Hammer C, Vanhauten H, Bijmolt S, Langendijk J, Both S, Van den Bergh A, Al-Uwini S. EP-1834 Feasibility study of extreme hypofractionated proton treatment planning for prostate cancer. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)32254-6] [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: 10/26/2022]
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9
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Jernigan S, Storey A, Hammer C, Riordan C, Orbach DB, Scott RM, Smith E. Moyamoya syndrome and PHACE syndrome: clinical and radiographic characterization of the intracranial arteriopathy and response to surgical revascularization. J Neurosurg Pediatr 2019; 23:493-497. [PMID: 30717056 DOI: 10.3171/2018.10.peds18582] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 10/29/2018] [Indexed: 11/06/2022]
Abstract
OBJECTIVE PHACE syndrome (PHACES) has been linked to cervical and cerebral vascular anomalies, including persistent embryonic anastomoses and progressive steno-occlusive disease. However, no prior studies have documented the long-term response of PHACES patients with moyamoya disease to surgical revascularization with pial or myosynangiosis. The authors present their experience with 8 consecutive patients with PHACES and moyamoya disease. METHODS Retrospective review of patients who underwent pial synangiosis revascularization for moyamoya disease with concurrent diagnosis of PHACES. RESULTS A total of 8 patients out of 456 surgically treated moyamoya patients had a diagnosis of PHACES. All patients were female, and their average age at the time of surgical treatment was 9.3 years (range 1.8-25.8 years). Five patients had associated basilar artery anomalies or stenosis. All patients had symptomatic narrowing of the petrous segment of the internal carotid artery with tortuous collateralization. Three patients underwent unilateral pial or myo-synangiosis and 5 underwent bilateral procedures. The average hospital length of stay was 5.0 days (range 3-7 days). There were no postoperative complications. Follow-up ranged from 8 to 160 months (average 56 months). Seven of 8 patients have had follow-up angiograms and all had Matsushima grade A or B collateralization without progression of stenosis in other locations. All patients had reduced cortical FLAIR signal on 6-month follow-up MRI and no evidence of new radiographic or clinical strokes. CONCLUSIONS Patients with moyamoya disease and PHACES had an intracranial arteriopathy characterized by ectactic anterior vasculature with concomitant basilar artery stenosis, and were all female. The patients had both radiographic and clinical responses to pial synangiosis. The surgical treatment of these patients can be challenging given facial hemangiomas located near the surgical field. Patients with unilateral disease did not have evidence of progression in other cerebral circulation during the given follow-up period.
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Affiliation(s)
| | | | | | | | - Darren B Orbach
- Departments of1Neurosurgery and.,2Neurointerventional Radiology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
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Bradbery A, Coverdale J, Hammer C, Wickersham T, Dunlap K, Leatherwood J, Satterfield M. 463 Effect of maternal overnutrition on insulin signaling in foal skeletal muscle. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.540] [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: 11/12/2022] Open
Affiliation(s)
- A Bradbery
- Texas A&M University,Bryan, TX, United States
| | - J Coverdale
- Texas A&M University,College Station, TX, United States
| | - C Hammer
- North Dakota State University,Fargo, ND, United States
| | - T Wickersham
- Texas A&M University,College Station, TX, United States
| | - K Dunlap
- Texas A&M University,College Station, TX, United States
| | - J Leatherwood
- Texas A&M University,College Station, TX, United States
| | - M Satterfield
- Texas A&M University,College Station, TX, United States
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Achey RL, Yamamoto E, Sexton D, Hammer C, Lee BS, Butler RS, Thompson NR, Nagel SJ, Machado AG, Lobel DA. Prediction of depression and anxiety via patient-assessed tremor severity, not physician-reported motor symptom severity, in patients with Parkinson’s disease or essential tremor who have undergone deep brain stimulation. J Neurosurg 2018; 129:1562-1571. [DOI: 10.3171/2017.8.jns1733] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Accepted: 08/28/2017] [Indexed: 11/06/2022]
Abstract
OBJECTIVEDeep brain stimulation (DBS) is an effective therapy for movement disorders such as idiopathic Parkinson’s disease (PD) and essential tremor (ET). However, some patients who demonstrate benefit on objective motor function tests do not experience postoperative improvement in depression or anxiety, 2 important components of quality of life (QOL). Thus, to examine other possible explanations for the lack of a post-DBS correlation between improved objective motor function and decreased depression or anxiety, the authors investigated whether patient perceptions of motor symptom severity might contribute to disease-associated depression and anxiety.METHODSThe authors performed a retrospective chart review of PD and ET patients who had undergone DBS at the Cleveland Clinic in the period from 2009 to 2013. Patient demographics, diagnosis (PD, ET), motor symptom severity, and QOL measures (Primary Care Evaluation of Mental Disorders 9-item Patient Health Questionnaire [PHQ-9] for depression, Generalized Anxiety Disorder 7-item Scale [GAD-7], and patient-assessed tremor scores) were collected at 4 time points: preoperatively, postoperatively, 1-year follow-up, and 2-year follow-up. Multivariable prediction models with solutions for fixed effects were constructed to assess the correlation of predictor variables with PHQ-9 and GAD-7 scores. Predictor variables included age, sex, visit time, diagnosis (PD vs ET), patient-assessed tremor, physician-reported tremor, Unified Parkinson’s Disease Rating Scale part III (UPDRS-III) score, and patient-assessed tremor over time.RESULTSSeventy PD patients and 17 ET patients were included in this analysis. Mean postoperative and 1-year follow-up UPDRS-III and physician-reported tremor scores were significantly decreased compared with preoperative scores (p < 0.0001). Two-year follow-up physician-reported tremor was also significantly decreased from preoperative scores (p < 0.0001). Only a diagnosis of PD (p = 0.0047) and the patient-assessed tremor rating (p < 0.0001) were significantly predictive of depression. A greater time since surgery, in general, significantly decreased anxiety scores (p < 0.0001) except when a worsening of patient-assessed tremor was reported over the same time period (p < 0.0013).CONCLUSIONSPatient-assessed tremor severity alone was predictive of depression in PD and ET following DBS. This finding suggests that a patient’s perception of illness plays a greater role in depression than objective physical disability regardless of the time since surgical intervention. In addition, while anxiety may be attenuated by DBS, patient-assessed return of tremor over time can increase anxiety, highlighting the importance of long-term follow-up for behavioral health features in chronic neurological disorders. Together, these data suggest that the patient experience of motor symptoms plays a role in depression and anxiety—a finding that warrants consideration when evaluating, treating, and following movement disorder patients who are candidates for DBS.
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Affiliation(s)
- Rebecca L. Achey
- 1Cleveland Clinic Lerner College of Medicine of Case Western Reserve University
| | - Erin Yamamoto
- 1Cleveland Clinic Lerner College of Medicine of Case Western Reserve University
| | - Daniel Sexton
- 1Cleveland Clinic Lerner College of Medicine of Case Western Reserve University
| | - Christine Hammer
- 2Department of Neurological Surgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, Pennsylvania
| | - Bryan S. Lee
- 3Department of Neurosurgery, Neurological Institute
| | | | | | - Sean J. Nagel
- 5Center for Neurological Restoration, Department of Neurosurgery, Neurological Institute
| | - Andre G. Machado
- 5Center for Neurological Restoration, Department of Neurosurgery, Neurological Institute
- 6Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio; and
| | - Darlene A. Lobel
- 5Center for Neurological Restoration, Department of Neurosurgery, Neurological Institute
- 6Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio; and
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Schütz A, Pratschke J, Breuer M, Hammer C, Engelhardt M, Brandl U, Babic R, Reichart B, Kemkes BM. Allogeneic heart transplantation following xenogeneic bridging. Transpl Int 2018. [DOI: 10.1111/tri.1992.5.s1.307] [Citation(s) in RCA: 3] [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: 11/28/2022]
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13
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Gooding M, Smith A, Peressutti D, Aljabar P, Evans E, Gwynne S, Hammer C, Meijer H, Speight R, Welgemoed C, Lustberg T, Van Soest J, Dekker A, Van Elmpt W. PV-0531: Multi-centre evaluation of atlas-based and deep learning contouring using a modified Turing Test. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)30841-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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14
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Van Vreeswijk N, Hammer C, Van den Bergh A, Vanhauten H, Bijmolt S, Langendijk J, Aluwini S. PV-0626: Long term toxicity after radiotherapy for prostate cancer: NTCP models for rectal toxicity. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)30936-8] [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: 10/14/2022]
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15
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Daou B, Hammer C, Mouchtouris N, Starke RM, Koduri S, Yang S, Jabbour P, Rosenwasser R, Tjoumakaris S. Anticoagulation vs Antiplatelet Treatment in Patients with Carotid and Vertebral Artery Dissection: A Study of 370 Patients and Literature Review. Neurosurgery 2017; 80:368-379. [PMID: 28362967 DOI: 10.1093/neuros/nyw086] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Accepted: 10/24/2016] [Indexed: 12/22/2022] Open
Abstract
Background Dissection of the carotid and vertebral arteries is an important cause of stroke in young patients. Objective The objective of this study is to compare antithrombotic treatments in patients with carotid and vertebral dissections. Methods Three hundred seventy patients with carotid and vertebral artery dissections were included. Univariate and multivariate analyses were conducted to analyze the association between treatment and new or recurrent events and clinical outcome. Results Mean follow-up was 24.3 months. In patients with spontaneous dissection, 55% received antiplatelets, 29.4% anticoagulation, and 12.6% combined treatment. New or recurrent ischemic and hemorrhagic events occurred in 9.6% of patients on antiplatelets, 10.4% on anticoagulation, and 13.3% on combined treatment. For traumatic dissection, 58.3% received antiplatelets, 26.9% anticoagulation, and 10.2% combined treatment. New or recurrent ischemic and hemorrhagic events occurred in 6.9% on antiplatelets, 11.1% on anticoagulation, and 20% on combined treatment. In patients with intracranial dissection, 63.1% were started on antiplatelets, 19.7% on anticoagulation, and 14.5% on combined treatment. Ischemic and hemorrhagic events occurred in 8.5% on antiplatelet treatment, 15.4% on anticoagulation, and 18.2% on combined treatment. In patients with extracranial dissection, 54.4% were on antiplatelets, 28.9% on anticoagulation, and 11.2% on combined treatment. Ischemic and hemorrhagic events occurred in 10.1% on antiplatelet treatment, 9.3% on anticoagulation, and 13.8% on combined treatment. The association between antithrombotic treatment and ischemic/hemorrhagic events and clinical outcome was not significant for all subtypes of dissection. Conclusion The rate of new or recurrent events is similar with antiplatelet and anticoagulation treatment in treating intracranial and extracranial carotid and vertebral artery dissection.
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Affiliation(s)
- Badih Daou
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, PA, USA
| | - Christine Hammer
- Department of Emergency Surgery, John Radcliffe Hospital, Oxford University Hospitals, NHS Foundation Trust, Oxford, UK
| | - Nikolaos Mouchtouris
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, PA, USA
| | - Robert M Starke
- Department of Neurological Surgery, Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Sravanthi Koduri
- Drexel University College of Medicine, Philadelphia, Pennsylvania, USA
| | - Steven Yang
- The Robotics Institute, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Pascal Jabbour
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, PA, USA
| | - Robert Rosenwasser
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, PA, USA
| | - Stavropoula Tjoumakaris
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, PA, USA
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Affiliation(s)
- A Blank
- Institut für Pathologie, Universität Bern, Murtenstraße 31, 3008, Bern, Schweiz.
| | - H Dawson
- Institut für Pathologie, Universität Bern, Murtenstraße 31, 3008, Bern, Schweiz
| | - C Hammer
- Institut für Pathologie, Universität Bern, Murtenstraße 31, 3008, Bern, Schweiz
| | - A Perren
- Institut für Pathologie, Universität Bern, Murtenstraße 31, 3008, Bern, Schweiz
| | - A Lugli
- Institut für Pathologie, Universität Bern, Murtenstraße 31, 3008, Bern, Schweiz
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Aima M, Culberson W, Hammer C, Micka J, DeWerd L. SU-G-201-06: Directional Low-Dose Rate Brachytherapy: Determination of the TG-43 Dose-Rate Constant Analog for a New Pd-103 Source. Med Phys 2016. [DOI: 10.1118/1.4956879] [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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Prajapati S, Mo X, Bednarz B, Lawless M, Hammer C, Flynn R, Westerly D, Jeraj R, Mackie T. SU-F-T-667: Development and Validation of Dose Calculation for An Open-Source KV Treatment Planning System for Small Animal Radiotherapy. Med Phys 2016. [DOI: 10.1118/1.4956853] [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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Hammer C, Daou B, Chalouhi N, Starke RM, Ya'qoub L, Mouchtouris N, Koduri S, Tjoumakaris S, Rosenwasser RH, Jabbour P. Decreased CSF output as a clinical indicator of cerebral vasospasm following aneurysmal subarachnoid hemorrhage. Clin Neurol Neurosurg 2016; 144:101-4. [PMID: 27037865 DOI: 10.1016/j.clineuro.2016.03.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 02/22/2016] [Accepted: 03/27/2016] [Indexed: 11/17/2022]
Abstract
OBJECTIVE Vasospasm is a significant cause of morbidity and mortality among those with aneurysmal subarachnoid hemorrhage (aSAH). Treating increased intracranial pressure by drainage of cerebral spinal fluid through an external ventriculostomy is routine practice. The objective of this study is to evaluate the trends of CSF output in patients who experience vasospasm. METHODS Electronic medical charts were reviewed to identify two groups of patients with aSAH, 75 consecutive patients who developed vasospasm and 75 matched patients who did not develop vasospasm. CSF output was recorded within 3 days before and 3 days after the occurrence of vasospasm. CSF output was recorded for the same days after SAH in matched patients with no vasospasm. RESULTS Total CSF output was lower in patients with vasospasm as compared to patients without vasospasm matched for the same day (p<0.001). In patients with vasospasm, CSF output recordings were significantly higher prior to the occurrence of vasospasm (438ml/day) than the period following vasospasm (325.7ml/day), with a consistent decrease in CSF drainage from day 3 before vasospasm to day 3 after vasospasm (p=0.012). Decreasing CSF output was significantly associated with the occurrence of vasospasm (p=0.017). Youden indices demonstrated that daily CSF drainage <160ml was significantly associated with the occurrence of vasospasm. The sensitivity of this test was 64.79% and the specificity was 55.38%. CONCLUSIONS In addition to clinical exam findings, observation of a CSF output decline to less than 160ml/day may be used as additional support for the diagnosis of vasospasm.
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Affiliation(s)
- Christine Hammer
- Department of Neurological Surgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, PA, USA
| | - Badih Daou
- Department of Neurological Surgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, PA, USA
| | - Nohra Chalouhi
- Department of Neurological Surgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, PA, USA
| | - Robert M Starke
- Department of Neurological Surgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, PA, USA
| | - Lina Ya'qoub
- Department of Neurological Surgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, PA, USA
| | - Nikolaos Mouchtouris
- Department of Neurological Surgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, PA, USA
| | - Sravanthi Koduri
- Department of Neurological Surgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, PA, USA
| | - Stavropoula Tjoumakaris
- Department of Neurological Surgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, PA, USA
| | - Robert H Rosenwasser
- Department of Neurological Surgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, PA, USA
| | - Pascal Jabbour
- Department of Neurological Surgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, PA, USA.
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Daou B, Hammer C, Chalouhi N, Starke RM, Jabbour P, Rosenwasser RH, Tjoumakaris S. Dissecting pseudoaneurysms: predictors of symptom occurrence, enlargement, clinical outcome, and treatment. J Neurosurg 2016; 125:936-942. [PMID: 26824374 DOI: 10.3171/2015.10.jns151846] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Dissection of the carotid and vertebral arteries can result in the development of aneurysmal dilations. These dissecting pseudoaneurysms can enlarge and cause symptoms. The objective of this study is to provide insight into the progression of dissecting pseudoaneurysms and the treatments required to manage them. METHODS A review of the electronic medical records was conducted to detect patients with carotid and vertebral artery dissection. An imaging review was conducted to identify patients with dissecting pseudoaneurysms. One hundred twelve patients with 120 dissecting pseudoaneurysms were identified. Univariate and multivariate analyses were conducted to assess the factors associated with undergoing further interventions other than medical treatment, pseudoaneurysm enlargement, pseudoaneurysms resulting in ischemic and nonischemic symptoms, and clinical outcome. RESULTS Overall, 18.3% of pseudoaneurysms were intracranial and 81.7% were extracranial, and the average size was 7.3 mm. The mean follow-up time was 29.3 months; 3.3% of patients had a recurrent transient ischemic attack, no patients had a recurrent stroke, and 14.2% of patients had recurrence of nonischemic symptoms (headache, neck pain, Horner syndrome, or cranial nerve palsy). Follow-up imaging demonstrated that 13.8% of pseudoaneurysms had enlarged, 30.2% had healed, and 56% had remained stable. In total, 20.8% of patients had an intervention other than medical treatment. Interventions included stenting, coiling, flow diversion, and clipping. Predictors of intervention included increasing size, size > 10 mm, location in the C2 (petrous) segment of the internal carotid artery (ICA), younger age, hyperlipidemia, pseudoaneurysm enlargement, and any symptom development. Significant predictors of enlargement included smoking, history of trauma, C2 location, hyperlipidemia, and larger initial pseudoaneurysm size. Predictors of pseudoaneurysm resulting in recurrent ischemic and nonischemic symptoms included increasing size and location in the petrous segment of the ICA. Smoking was a predictor of unfavorable outcome. CONCLUSIONS Dissecting pseudoaneurysms have a benign course and most will not cause symptoms or enlarge on follow-up. Medical treatment can be a sufficient, initial treatment for dissecting pseudoaneurysms.
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Affiliation(s)
- Badih Daou
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, Pennsylvania
| | - Christine Hammer
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, Pennsylvania
| | - Nohra Chalouhi
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, Pennsylvania
| | - Robert M Starke
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, Pennsylvania
| | - Pascal Jabbour
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, Pennsylvania
| | - Robert H Rosenwasser
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, Pennsylvania
| | - Stavropoula Tjoumakaris
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, Pennsylvania
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Rathnasamy Muthusamy AS, Hammer C, Somasundaram M, Friend P, Darby C. On Candida arteritis in renal transplant recipients. Transpl Infect Dis 2015; 17:929-30. [PMID: 26332277 DOI: 10.1111/tid.12448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 08/09/2015] [Indexed: 11/30/2022]
Affiliation(s)
| | - C Hammer
- Transplant Surgery, Oxford Transplant Centre, Churchill Hospital, Oxford, UK
| | - M Somasundaram
- Transplant Surgery, Oxford Transplant Centre, Churchill Hospital, Oxford, UK.,Nuffield Department of Surgical Sciences, University of Oxford, Oxford, UK
| | - P Friend
- Transplant Surgery, Oxford Transplant Centre, Churchill Hospital, Oxford, UK.,Nuffield Department of Surgical Sciences, University of Oxford, Oxford, UK
| | - C Darby
- Transplant Surgery, Oxford Transplant Centre, Churchill Hospital, Oxford, UK
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Desai V, Hammer C, Kunugi K, Culberson W, DeWerd L. SU-E-T-172: Characterization of TLD-100 (LiF:Mg,Ti) Microcube Energy Response in a Cylindrical Chamber Phantom. Med Phys 2015. [DOI: 10.1118/1.4924534] [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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Affiliation(s)
- C Hammer
- Institute for Surgical Research, University of Munich, Klinikum Grosshadern, Munich, FRG
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25
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Hammer C, Atukorala ADS, Franz‐Odendaal T. Dentition Influences Shape of Oral Jaws in Fish. FASEB J 2015. [DOI: 10.1096/fasebj.29.1_supplement.700.2] [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: 11/11/2022]
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26
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Hammer C, Bantema-Joppe E, Van der Schaaf A, Van der Laan H, Langendijk J, Maduro J. OC-0390: Prognostic factors for fibrosis after radiotherapy with an integrated boost for the treatment of breast carcinoma. Radiother Oncol 2015. [DOI: 10.1016/s0167-8140(15)40386-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: 11/16/2022]
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Chalouhi N, Zanaty M, Whiting A, Yang S, Tjoumakaris S, Hasan D, Starke RM, Hann S, Hammer C, Kung D, Rosenwasser R, Jabbour P. Safety and efficacy of the Pipeline Embolization Device in 100 small intracranial aneurysms. J Neurosurg 2015; 122:1498-502. [PMID: 25635478 DOI: 10.3171/2014.12.jns14411] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [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]
Abstract
OBJECT Flow diverters are increasingly used for treatment of intracranial aneurysms. In most series, the Pipeline Embolization Device (PED) was used for the treatment of large, giant, complex, and fusiform aneurysms. Little is known about the use of the PED in small aneurysms. The purpose of this study was to assess the safety and efficacy of the PED in small aneurysms (≤ 7 mm). METHODS A total of 100 consecutive patients were treated with the PED at the authors' institution between May 2011 and September 2013. Data on procedural safety and efficacy were retrospectively collected. RESULTS The mean aneurysm size was 5.2 ± 1.5 mm. Seven patients (7%) had sustained a subarachnoid hemorrhage. All except 5 aneurysms (95%) arose from the anterior circulation. The number of PEDs used was 1.2 per aneurysm. Symptomatic procedure-related complications occurred in 3 patients (3%): 1 distal parenchymal hemorrhage that was managed conservatively and 2 ischemic events. At the latest follow-up (mean 6.3 months), 54 (72%) aneurysms were completely occluded (100%), 10 (13%) were nearly completely occluded (≥ 90%), and 11 (15%) were incompletely occluded (< 90%). Six aneurysms (8%) required further treatment. Increasing aneurysm size (OR 3.8, 95% CI 0.99-14; p = 0.05) predicted retreatment. All patients achieved a favorable outcome (modified Rankin Scale Score 0-2) at follow-up. CONCLUSIONS In this study, treatment of small aneurysms with the PED was associated with low complication rates and high aneurysm occlusion rates. These findings suggest that the PED is a safe and effective alternative to conventional endovascular techniques for small aneurysms. Randomized trials with long-term follow-up are necessary to determine the optimal treatment that leads to the highest rate of obliteration and the best clinical outcomes.
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Affiliation(s)
- Nohra Chalouhi
- 1Department of Neurological Surgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, Pennsylvania
| | - Mario Zanaty
- 1Department of Neurological Surgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, Pennsylvania
| | - Alex Whiting
- 1Department of Neurological Surgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, Pennsylvania
| | - Steven Yang
- 1Department of Neurological Surgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, Pennsylvania
| | - Stavropoula Tjoumakaris
- 1Department of Neurological Surgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, Pennsylvania
| | - David Hasan
- 2Department of Neurosurgery, University of Iowa, Iowa City, Iowa; and
| | - Robert M Starke
- 3Department of Neurological Surgery, University of Virginia, Charlottesville, Virginia
| | - Shannon Hann
- 1Department of Neurological Surgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, Pennsylvania
| | - Christine Hammer
- 1Department of Neurological Surgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, Pennsylvania
| | - David Kung
- 1Department of Neurological Surgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, Pennsylvania
| | - Robert Rosenwasser
- 1Department of Neurological Surgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, Pennsylvania
| | - Pascal Jabbour
- 1Department of Neurological Surgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, Pennsylvania
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Affiliation(s)
- C Hammer
- Ashford and St Peter's Hospitals NHS Foundation Trust, UK
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Hammer C, Zerche M, Schneider A, Begemann M, Nave KA, Ehrenreich H. Apolipoprotein E4 carrier status plus circulating anti-NMDAR1 autoantibodies: association with schizoaffective disorder. Mol Psychiatry 2014; 19:1054-6. [PMID: 24888362 PMCID: PMC4195337 DOI: 10.1038/mp.2014.52] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- C Hammer
- Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany
- DFG Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), Göttingen, Germany
| | - M Zerche
- Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - A Schneider
- DFG Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), Göttingen, Germany
- German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany
| | - M Begemann
- Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany
- DFG Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), Göttingen, Germany
| | - K-A Nave
- DFG Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), Göttingen, Germany
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - H Ehrenreich
- Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany
- DFG Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), Göttingen, Germany
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Hammer C, Stepniak B, Schneider A, Papiol S, Tantra M, Begemann M, Sirén AL, Pardo LA, Sperling S, Mohd Jofrry S, Gurvich A, Jensen N, Ostmeier K, Lühder F, Probst C, Martens H, Gillis M, Saher G, Assogna F, Spalletta G, Stöcker W, Schulz TF, Nave KA, Ehrenreich H. Neuropsychiatric disease relevance of circulating anti-NMDA receptor autoantibodies depends on blood-brain barrier integrity. Mol Psychiatry 2014; 19:1143-9. [PMID: 23999527 DOI: 10.1038/mp.2013.110] [Citation(s) in RCA: 255] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Revised: 07/19/2013] [Accepted: 07/22/2013] [Indexed: 12/24/2022]
Abstract
In 2007, a multifaceted syndrome, associated with anti-NMDA receptor autoantibodies (NMDAR-AB) of immunoglobulin-G isotype, has been described, which variably consists of psychosis, epilepsy, cognitive decline and extrapyramidal symptoms. Prevalence and significance of NMDAR-AB in complex neuropsychiatric disease versus health, however, have remained unclear. We tested sera of 2817 subjects (1325 healthy, 1081 schizophrenic, 263 Parkinson and 148 affective-disorder subjects) for presence of NMDAR-AB, conducted a genome-wide genetic association study, comparing AB carriers versus non-carriers, and assessed their influenza AB status. For mechanistic insight and documentation of AB functionality, in vivo experiments involving mice with deficient blood-brain barrier (ApoE(-/-)) and in vitro endocytosis assays in primary cortical neurons were performed. In 10.5% of subjects, NMDAR-AB (NR1 subunit) of any immunoglobulin isotype were detected, with no difference in seroprevalence, titer or in vitro functionality between patients and healthy controls. Administration of extracted human serum to mice influenced basal and MK-801-induced activity in the open field only in ApoE(-/-) mice injected with NMDAR-AB-positive serum but not in respective controls. Seropositive schizophrenic patients with a history of neurotrauma or birth complications, indicating an at least temporarily compromised blood-brain barrier, had more neurological abnormalities than seronegative patients with comparable history. A common genetic variant (rs524991, P=6.15E-08) as well as past influenza A (P=0.024) or B (P=0.006) infection were identified as predisposing factors for NMDAR-AB seropositivity. The >10% overall seroprevalence of NMDAR-AB of both healthy individuals and patients is unexpectedly high. Clinical significance, however, apparently depends on association with past or present perturbations of blood-brain barrier function.
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Affiliation(s)
- C Hammer
- Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - B Stepniak
- Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - A Schneider
- 1] Department of Psychiatry & Psychotherapy, University Medicine Göttingen, Göttingen, Germany [2] DFG Research Center Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), Göttingen, Germany [3] German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany
| | - S Papiol
- 1] Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany [2] DFG Research Center Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), Göttingen, Germany
| | - M Tantra
- 1] Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany [2] DFG Research Center Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), Göttingen, Germany
| | - M Begemann
- Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - A-L Sirén
- Department of Neurosurgery, University Clinic of Würzburg, Würzburg, Germany
| | - L A Pardo
- Department of Molecular Biology of Neuronal Signals, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - S Sperling
- Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - S Mohd Jofrry
- Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - A Gurvich
- Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - N Jensen
- Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - K Ostmeier
- Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - F Lühder
- Department of Neuroimmunology, Institute for Multiple Sclerosis Research and Hertie Foundation, University Medicine Göttingen, Göttingen, Germany
| | - C Probst
- Institute for Experimental Immunology, affiliated to Euroimmun, Lübeck, Germany
| | - H Martens
- Synaptic Systems GmbH, Göttingen, Germany
| | - M Gillis
- Institute of Virology, Hannover Medical School, Hannover, Germany
| | - G Saher
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - F Assogna
- Department of Clinical and Behavioral Neurology, IRCCS Santa Lucia Foundation, Rome, Italy
| | - G Spalletta
- Department of Clinical and Behavioral Neurology, IRCCS Santa Lucia Foundation, Rome, Italy
| | - W Stöcker
- Institute for Experimental Immunology, affiliated to Euroimmun, Lübeck, Germany
| | - T F Schulz
- Institute of Virology, Hannover Medical School, Hannover, Germany
| | - K-A Nave
- 1] DFG Research Center Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), Göttingen, Germany [2] Department of Neurogenetics, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - H Ehrenreich
- 1] Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany [2] DFG Research Center Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), Göttingen, Germany
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Chalouhi N, Zanaty M, Whiting A, Yang S, Tjoumakaris SI, Hasan DM, Starke RM, Hann SW, Hammer C, Kung D, Rosenwasser RH, Jabbour P. 125 Safety and Efficacy of the Pipeline Embolization Device in 100 Small Intracranial Aneurysms. Neurosurgery 2014. [DOI: 10.1227/01.neu.0000452399.62037.ac] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Chalouhi N, Zanaty M, Whiting A, Yang S, Tjoumakaris S, Hasan D, Starke R, Hann MS, Hammer C, Kung D, Rosenwasser R, Jabbour P. E-020 Safety and Efficacy of the Pipeline Embolization Device in 100 Small Intracranial Aneurysms. J Neurointerv Surg 2014. [DOI: 10.1136/neurintsurg-2014-011343.87] [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: 11/04/2022]
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Papiol S, Mitjans M, Assogna F, Piras F, Hammer C, Caltagirone C, Arias B, Ehrenreich H, Spalletta G. Polygenic determinants of white matter volume derived from GWAS lack reproducibility in a replicate sample. Transl Psychiatry 2014; 4:e362. [PMID: 24548877 PMCID: PMC3944630 DOI: 10.1038/tp.2013.126] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Revised: 11/04/2013] [Accepted: 11/25/2013] [Indexed: 11/17/2022] Open
Abstract
A recent publication reported an exciting polygenic effect of schizophrenia (SCZ) risk variants, identified by a large genome-wide association study (GWAS), on total brain and white matter volumes in schizophrenic patients and, even more prominently, in healthy subjects. The aim of the present work was to replicate and then potentially extend these findings. According to the original publication, polygenic risk scores-using single nucleotide polymorphism (SNP) information of SCZ GWAS-(polygenic SCZ risk scores; PSS) were calculated in 122 healthy subjects, enrolled in a structural magnetic resonance imaging (MRI) study. These scores were computed based on P-values and odds ratios available through the Psychiatric GWAS Consortium. In addition, polygenic white matter scores (PWM) were calculated, using the respective SNP subset in the original publication. None of the polygenic scores, either PSS or PWM, were found to be associated with total brain, white matter or gray matter volume in our replicate sample. Minor differences between the original and the present study that might have contributed to lack of reproducibility (but unlikely explain it fully), are number of subjects, ethnicity, age distribution, array technology, SNP imputation quality and MRI scanner type. In contrast to the original publication, our results do not reveal the slightest signal of association of the described sets of GWAS-identified SCZ risk variants with brain volumes in adults. Caution is indicated in interpreting studies building on polygenic risk scores without replication sample.
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Affiliation(s)
- S Papiol
- Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany
- DFG Research Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), Göttingen, Germany
- Centro de Investigaciones Biomédicas en Red de Salud Mental (CIBERSAM), Barcelona, Spain
| | - M Mitjans
- Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany
- Centro de Investigaciones Biomédicas en Red de Salud Mental (CIBERSAM), Barcelona, Spain
- Unitat Antropologia, Departament de Biologia Animal, Facultat de Biologia and Institut de Biomedicina (IBUB), Universitat de Barcelona, Barcelona, Spain
| | - F Assogna
- Fondazione Santa Lucia, Laboratorio di Neuropsichiatria, Roma, Italy
| | - F Piras
- Fondazione Santa Lucia, Laboratorio di Neuropsichiatria, Roma, Italy
| | - C Hammer
- Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - C Caltagirone
- Department of Neuroscience, IRCCS Fondazione Santa Lucia and Tor Vergata University, Roma, Italy
| | - B Arias
- Centro de Investigaciones Biomédicas en Red de Salud Mental (CIBERSAM), Barcelona, Spain
- Unitat Antropologia, Departament de Biologia Animal, Facultat de Biologia and Institut de Biomedicina (IBUB), Universitat de Barcelona, Barcelona, Spain
| | - H Ehrenreich
- Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany
- DFG Research Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), Göttingen, Germany
| | - G Spalletta
- Fondazione Santa Lucia, Laboratorio di Neuropsichiatria, Roma, Italy
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Chalouhi N, Tjoumakaris S, Thakkar V, Theofanis T, Hammer C, Hasan D, Starke RM, Wu C, Gonzalez LF, Rosenwasser R, Jabbour P. Endovascular management of cerebral vasospasm following aneurysm rupture: outcomes and predictors in 116 patients. Clin Neurol Neurosurg 2014; 118:26-31. [PMID: 24529225 DOI: 10.1016/j.clineuro.2013.12.012] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2013] [Revised: 11/11/2013] [Accepted: 12/25/2013] [Indexed: 11/17/2022]
Abstract
OBJECTIVE To retrospectively assess the safety and efficacy of endovascular treatment of cerebral vasospasm with different modalities and assess predictors of outcome. METHODS Endovascular treatment was indicated in the event of neurological deterioration refractory to medical therapy. Data were collected for 116 patients treated at our institution. RESULTS Vasospasm was treated with balloon angioplasty in 52.6%, intra-arterial nicardipine infusion in 19.8%, or both in 27.6%. Angiographic vasospasm was reversed in all but 4 (96.6%) patients. The complication rate was 0.9%. Twenty patients (17.2%) had incipient pre-procedure hypodensities; 3 (15%) hypodensities were reversed and neurological improvement occurred in 60% of these patients. Retreatment was required in 22 (19%) patients. Higher Hunt and Hess grades and treatment with nicardipine alone predicted retreatment. Neurological improvement was noted in 82%. Male gender, pre-procedure hypodensities, and posterior communicating artery aneurysm location negatively predicted neurological recovery. Favorable outcomes were noted in 73%. Higher Hunt and Hess grades, pre-procedure hypodensities, posterior circulation aneurysms, and no neurological recovery predicted poor outcome. CONCLUSION Endovascular therapy for vasospasm has an excellent safety-efficacy profile. Balloon angioplasty and nicardipine are equally effective but effects of nicardipine are less durable. Patients with incipient pre-procedure hypodensities benefit from endovascular intervention and should probably not be excluded from treatment.
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Affiliation(s)
- Nohra Chalouhi
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, USA
| | - Stavropoula Tjoumakaris
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, USA
| | - Vismay Thakkar
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, USA
| | - Thana Theofanis
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, USA
| | - Christine Hammer
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, USA
| | - David Hasan
- Department of Neurosurgery, University of Iowa, Iowa City, USA
| | - Robert M Starke
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, USA
| | - Chengyuan Wu
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, USA
| | - L Fernando Gonzalez
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, USA
| | - Robert Rosenwasser
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, USA
| | - Pascal Jabbour
- Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, USA.
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Atukorala ADS, Hammer C, Dufton M, Franz-Odendaal TA. Adaptive evolution of the lower jaw dentition in Mexican tetra (Astyanax mexicanus). EvoDevo 2013; 4:28. [PMID: 24099036 PMCID: PMC3852964 DOI: 10.1186/2041-9139-4-28] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Accepted: 08/06/2013] [Indexed: 01/01/2023] Open
Abstract
Background The Mexican tetra (Astyanax mexicanus) has emerged as a good animal model to study the constructive and regressive changes associated with living in cave environments, as both the ancestral sighted morph and the cave dwelling morph are extant. The cave dwelling morphs lack eyes and body pigmentation, but have well developed oral and sensory systems that are essential for survival in dark environments. The cave forms and surface forms are interfertile and give rise to F1 hybrids progeny known as intermediates. In cavefish, degeneration of the lens is one of the key events leading to eye regression. We have previously shown that surgical lens removal in surface fish embryos has an effect on the craniofacial skeleton. Surprisingly, lens removal was also found to have an effect on the caudal teeth in the lower jaw. In order to understand this result, we analyzed the lower jaw and upper jaw dentitions of surface, cavefish and F1 hybrids of surface and cavefish and compared our findings with surface fish that underwent lens removal. We also investigated the upper jaw (premaxillae and maxillae) dentition in these fish. Results Our tooth analyses shows that cavefish have the highest numbers of teeth in the mandible and maxillae, surface forms have the lowest numbers and F1 hybrids are between these groups. These differences are not observed in the premaxillae. A wide diversity of cuspal morphology can also be found in these fish. Jaw size also differs amongst the groups, with the mandible exhibiting the greatest differences. Interestingly, tooth number in surgery fish is different only in the caudal region of the mandible; this is the region that is constrained in size in all morphs. Conclusion Our data provides the first detailed description of the jaw dentitions of two morphs of Astyanax mexicanus, as well as in F1 hybrids. Tooth number, patterning and cuspal morphology are enhanced in cavefish in all jaws. This is in contrast to the increase in tooth number previously observed on the lens ablated side of the surgery fish. These findings indicate that the mechanisms which govern the constructive traits in cavefish are different to the mechanisms causing an increase tooth number in surgery fish.
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Childers M, Joubert R, Poulard K, Holder M, Grange R, Doering J, Lawlor M, Moal C, Jamet T, Danièle N, Martin C, Rivière C, Poppante K, Soker T, Hammer C, Van Wittenberghe L, Guan X, Goddard M, Mitchell E, Barber J, Furth M, Vignaud A, Masurier C, Moullier P, Beggs A, Buj-Bello A. P.4.3 Intravenous infusion of AAV8–MTM1 prolongs life and ameliorates severe muscle pathology in mouse and dog models of X-linked myotubular myopathy. Neuromuscul Disord 2013. [DOI: 10.1016/j.nmd.2013.06.441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Rijken-Zijlstra TM, Haadsma ML, Hammer C, Burgerhof JGM, Pelinck MJ, Simons AHM, van Echten-Arends J, Arts JGEM, Land JA, Groen H, Hoek A. Effectiveness of indometacin to prevent ovulation in modified natural-cycle IVF: a randomized controlled trial. Reprod Biomed Online 2013; 27:297-304. [PMID: 23876971 DOI: 10.1016/j.rbmo.2013.05.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [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: 12/16/2012] [Revised: 05/11/2013] [Accepted: 05/16/2013] [Indexed: 12/28/2022]
Abstract
Modified natural-cycle IVF has a lower pregnancy rate per started cycle as compared with IVF with ovarian stimulation due to, for example, premature ovulation. Indometacin administered before ovulation prevents follicle rupture. Therefore, addition of indometacin may improve the effectiveness of modified natural-cycle IVF. This double-blind, randomized, placebo-controlled trial with indometacin or placebo in 120 women aged 27-36 years compared the number of patients without premature ovulation as compared with the number of patients with one or more ovulations in a maximum of six cycles. Indometacin had no significant influence on the probability of a premature ovulation in patients during the six cycles (OR 2.38, 95% CI 0.94-6.04). A subgroup analysis showed a significant influence of indometacin in decreasing the probability of a premature ovulation in cycles without LH surge at the day of human chorionic gonadotrophin administration (OR 8.29, 95% CI 1.63-42.3, P=0.009). Although this study could not detect a significantly lower ovulation rate in the indometacin group versus the placebo group, the data suggest that a subgroup of patients without LH surge prior to oocyte retrieval might benefit from indometacin in modified natural-cycle IVF.
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Affiliation(s)
- T M Rijken-Zijlstra
- Department of Obstetrics and Gynaecology, University of Groningen, University Medical Centre Groningen, PO Box 30001, 9700 RB Groningen, The Netherlands.
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Hammer C, Voshege N, Hillen U, Dissemond J. [Generalised erythema, scaling and hair anomaly]. Hautarzt 2013; 64:516-8. [PMID: 23604280 DOI: 10.1007/s00105-013-2582-5] [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: 11/29/2022]
Affiliation(s)
- C Hammer
- Dermatologie/Venerologie, Universitätshautklinik Heidelberg, Heidelberg, Deutschland
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El-Kordi A, Kästner A, Grube S, Klugmann M, Begemann M, Sperling S, Hammerschmidt K, Hammer C, Stepniak B, Patzig J, de Monasterio-Schrader P, Strenzke N, Flügge G, Werner HB, Pawlak R, Nave KA, Ehrenreich H. A single gene defect causing claustrophobia. Transl Psychiatry 2013; 3:e254. [PMID: 23632458 PMCID: PMC3641414 DOI: 10.1038/tp.2013.28] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Claustrophobia, the well-known fear of being trapped in narrow/closed spaces, is often considered a conditioned response to traumatic experience. Surprisingly, we found that mutations affecting a single gene, encoding a stress-regulated neuronal protein, can cause claustrophobia. Gpm6a-deficient mice develop normally and lack obvious behavioral abnormalities. However, when mildly stressed by single-housing, these mice develop a striking claustrophobia-like phenotype, which is not inducible in wild-type controls, even by severe stress. The human GPM6A gene is located on chromosome 4q32-q34, a region linked to panic disorder. Sequence analysis of 115 claustrophobic and non-claustrophobic subjects identified nine variants in the noncoding region of the gene that are more frequent in affected individuals (P=0.028). One variant in the 3'untranslated region was linked to claustrophobia in two small pedigrees. This mutant mRNA is functional but cannot be silenced by neuronal miR124 derived itself from a stress-regulated transcript. We suggest that loosing dynamic regulation of neuronal GPM6A expression poses a genetic risk for claustrophobia.
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Affiliation(s)
- A El-Kordi
- Division of Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany,DFG Research Center for Molecular Physiology of the Brain (CMPB), Göttingen, Germany
| | - A Kästner
- Division of Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - S Grube
- Division of Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - M Klugmann
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - M Begemann
- Division of Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany,DFG Research Center for Molecular Physiology of the Brain (CMPB), Göttingen, Germany
| | - S Sperling
- Division of Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - K Hammerschmidt
- Cognitive Ethology Laboratory, German Primate Center, Göttingen, Germany
| | - C Hammer
- Division of Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - B Stepniak
- Division of Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - J Patzig
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | | | - N Strenzke
- Department of Otolaryngology, Georg-August-University, Göttingen, Germany
| | - G Flügge
- DFG Research Center for Molecular Physiology of the Brain (CMPB), Göttingen, Germany,Department of Clinical Neurobiology, German Primate Center, Göttingen, Germany
| | - H B Werner
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - R Pawlak
- Laboratory of Neuronal Plasticity and Behaviour, University of Exeter Medical School, University of Exeter, Exeter, UK
| | - K-A Nave
- DFG Research Center for Molecular Physiology of the Brain (CMPB), Göttingen, Germany,Department of Neurogenetics, Max Planck Institute of Experimental Medicine, Göttingen, Germany,Max Planck Institute of Experimental Medicine, Hermann-Rein Street 3, 37075 Göttingen, Germany. E-mail: (HE) or (K-AN)
| | - H Ehrenreich
- Division of Clinical Neuroscience, Max Planck Institute of Experimental Medicine, Göttingen, Germany,DFG Research Center for Molecular Physiology of the Brain (CMPB), Göttingen, Germany,Max Planck Institute of Experimental Medicine, Hermann-Rein Street 3, 37075 Göttingen, Germany. E-mail: (HE) or (K-AN)
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Beggs A, Jamet T, Joubert R, Furth M, Holder M, Grange R, Lawlor M, Viola M, Poulard K, Masurier C, Martin S, Rivière C, Poppante K, Soker T, Hammer C, Vignaud A, Wittenberghe LV, Messaddeq N, Guan X, Goddard M, Mitchell E, Barber J, Danièle N, Widrick J, Pierson C, Moullier P, Armstrong D, Childers M, Buj-Bello A. T.O.4 Development of AAV-gene and protein-based therapies for X-linked myotubular myopathy. Neuromuscul Disord 2012. [DOI: 10.1016/j.nmd.2012.06.341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Lawless M, Junell S, Hammer C, DeWerd L. SU-E-T-137: The Response of TLD-100 in Mixed Fields of Photons and Electrons. Med Phys 2012; 39:3734. [DOI: 10.1118/1.4735195] [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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Yegingil Z, DeWerd LA, Davis SD, Hammer C, Kunugi K. Photon beam audits for radiation therapy clinics: a pilot mailed dosemeter study in Turkey. Radiat Prot Dosimetry 2012; 148:249-257. [PMID: 21362695 DOI: 10.1093/rpd/ncr017] [Citation(s) in RCA: 3] [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] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A thermoluminescent dosemeter (TLD) mailed dose audit programme was performed at five radiotherapy clinics in Turkey. The intercomparison was organised by the University of Wisconsin Radiation Calibration Laboratory (UWRCL), which was responsible for the technical aspects of the study including reference irradiations, distribution, collection and evaluation. The purpose of these audits was to perform an independent dosimetry check of the radiation beams using TLDs sent by mail. Acrylic holders, each with five TLD chips inside and instructions for their irradiation to specified absorbed dose to water of 2 Gy, were mailed to all participating clinics. TLD irradiations were performed with a 6 MV linear accelerator and (60)Co photon beams. The deviations from the TL readings of UWRCL were calculated. Discrepancies inside the limits of ±5 % between the participant-stated dose, and the TLD-measured dose were considered acceptable. One out of 10 beams checked was outside this limit, with a difference of 5.8 %.
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Affiliation(s)
- Z Yegingil
- Department of Physics, Faculty of Art-Sciences, University of Cukurova, Adana, Turkey.
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Kilpatrick LA, Labus JS, Coveleskie K, Hammer C, Rappold G, Tillisch K, Bueller JA, Suyenobu B, Jarcho JM, McRoberts JA, Niesler B, Mayer EA. The HTR3A polymorphism c. -42C>T is associated with amygdala responsiveness in patients with irritable bowel syndrome. Gastroenterology 2011; 140:1943-51. [PMID: 21420406 PMCID: PMC3757951 DOI: 10.1053/j.gastro.2011.03.011] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2010] [Revised: 02/02/2011] [Accepted: 03/07/2011] [Indexed: 12/19/2022]
Abstract
BACKGROUND & AIMS 5-Hydroxytryptamine (5-HT)3 receptor (5-HT3R) antagonists are effective in treating patients with irritable bowel syndrome (IBS) and have anxiolytic effects. Their therapeutic effects are related, in part, to reducing amygdala engagement during expected visceral pain. A single nucleotide polymorphism in HTR3A, c.-42C>T;(C178T; rs1062613), is associated with altered reactivity of the amygdala during emotional face processing in healthy subjects (controls). We evaluated the influence of this single nucleotide polymorphism on amygdala reactivity to emotional faces and nonemotional stimuli in female patients with IBS and controls. METHODS We measured brain responses during an affect-matching paradigm in 54 women (26 with IBS, 29 controls) using functional magnetic resonance imaging. We examined associations between HTR3A c.-42C>T genotype (C/C vs T carrier) and responses in amygdala and other regions of brain that expressed high levels of 5-HT3R. RESULTS The C/C genotype was associated with greater anxiety symptoms in patients with IBS and controls and increased activation of the amygdala under emotional and nonemotional conditions. Among patients with IBS, C/C genotype was associated with greater symptom ratings. A subset of IBS patients with the C/C genotype had increased amygdala responses to nonemotional stimuli, compared with other subjects with C/C genotype. CONCLUSIONS Regardless of diagnosis, the C/C genotype of the c.-42C>T polymorphism in HTR3A, compared with T carrier status, is associated with increased anxiety and amygdala responsiveness during emotional and nonemotional tasks. This polymorphism was associated with severity of IBS symptoms. Although this genotype is not sufficient for diagnosis of IBS, it is associated with severity of symptoms.
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Affiliation(s)
- LA Kilpatrick
- Center for Neurobiology of Stress, Ahmanson-Lovelace Brain Mapping Center, UCLA, Department of Medicine, Ahmanson-Lovelace Brain Mapping Center, UCLA
| | - JS Labus
- Center for Neurobiology of Stress, Ahmanson-Lovelace Brain Mapping Center, UCLA, Department of Psychiatry & Biobehavioral Sciences, Ahmanson-Lovelace Brain Mapping Center, UCLA, Brain Research Institute, David Geffen School of Medicine, UCLA
| | - K Coveleskie
- Center for Neurobiology of Stress, Ahmanson-Lovelace Brain Mapping Center, UCLA
| | - C Hammer
- Department of Human Molecular Genetics, University of Heidelberg, Germany
| | - G Rappold
- Department of Human Molecular Genetics, University of Heidelberg, Germany
| | - K Tillisch
- Center for Neurobiology of Stress, Ahmanson-Lovelace Brain Mapping Center, UCLA, Department of Medicine, Ahmanson-Lovelace Brain Mapping Center, UCLA
| | - JA Bueller
- Center for Neurobiology of Stress, Ahmanson-Lovelace Brain Mapping Center, UCLA, Department of Medicine, Ahmanson-Lovelace Brain Mapping Center, UCLA
| | - B Suyenobu
- Center for Neurobiology of Stress, Ahmanson-Lovelace Brain Mapping Center, UCLA, Department of Medicine, Ahmanson-Lovelace Brain Mapping Center, UCLA
| | - JM Jarcho
- Center for Neurobiology of Stress, Ahmanson-Lovelace Brain Mapping Center, UCLA, Department of Medicine, Ahmanson-Lovelace Brain Mapping Center, UCLA
| | - JA McRoberts
- Center for Neurobiology of Stress, Ahmanson-Lovelace Brain Mapping Center, UCLA, Department of Medicine, Ahmanson-Lovelace Brain Mapping Center, UCLA
| | - B Niesler
- Department of Human Molecular Genetics, University of Heidelberg, Germany
| | - EA Mayer
- Center for Neurobiology of Stress, Ahmanson-Lovelace Brain Mapping Center, UCLA, Department of Medicine, Ahmanson-Lovelace Brain Mapping Center, UCLA, Department of Psychiatry & Biobehavioral Sciences, Ahmanson-Lovelace Brain Mapping Center, UCLA, Brain Research Institute, David Geffen School of Medicine, UCLA
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Brenner P, Hinz M, Huber H, Schmoeckel M, Reichenspumer H, Meiser B, Hammer C, Reichart B. Influence of ischemic time on hyperacute xenograft rejection of pig hearts in a working heart perfusion model with human blood. Transpl Int 2011. [DOI: 10.1111/j.1432-2277.2000.tb02091.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Brenner P, Reichenspurner H, Schmoeckel M, Wimmer C, Rucker A, Eder V, Meiser B, Hinz M, Felbinger T, Hammer C, Reichart B. Prevention of hyperacute xenograft rejection in orthotopic xenotransplantation of pig hearts into baboons using immunoadsorption of antibodies and complement factors. Transpl Int 2011. [DOI: 10.1111/j.1432-2277.2000.tb02093.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hammer C. Ex situ management of Beira antelope Dorcatragus megalotis at Al Wabra Wildlife Preservation, Qatar. Int Zoo Yearb 2011; 45:259-273. [PMID: 32390677 PMCID: PMC7202063 DOI: 10.1111/j.1748-1090.2011.00137.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2009] [Revised: 08/15/2010] [Accepted: 01/06/2011] [Indexed: 12/01/2022]
Abstract
Al Wabra Wildlife Preservation (AWWP), Qatar, is the only facility worldwide to keep the Beira antelope Dorcatragus megalotis, a small antelope from East Africa, listed as Vulnerable by The IUCN Red List of Threatened Species. Physical, behavioural and physiological characteristics of the species are described in detail, based on observations in captivity. At AWWP, the Beira antelope population increased from 2000 until 2006 when it declined dramatically as a result of an epidemic‐like outbreak of a respiratory disease most likely owing to a Mycoplasma infection. Management at AWWP includes a diet based on natural forage, careful group composition, enclosure design adapted to the need of the species and close monitoring. Apart from their important conservation status, Beira antelope are highly attractive animals with a particular shape and coloration, and a docile nature.
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Affiliation(s)
- C Hammer
- Al Wabra Wildlife Preservation, Sheikh Saoud Bin Mohd. Bin Ali Al Thani, PO Box 44069, Doha, State of Qatar
E-mail: ;
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Walther S, Beiras-Fernandez A, Csapo C, Münzing S, Stief CG, Hammer C, Reichart B, Thein E. Influence of polyclonal antithymocyte globulins on the expression of adhesion molecules of isolated human umbilical vein endothelial cells. Transplant Proc 2010; 42:1931-4. [PMID: 20620550 DOI: 10.1016/j.transproceed.2009.11.038] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2009] [Accepted: 11/24/2009] [Indexed: 11/19/2022]
Abstract
OBJECTIVES Polyclonal antithymocyte globulins (ATGs) are immunosuppressive agents applied for the treatment and prevention of organ rejection after transplantation. ATGs induce complement-mediated cell death in T lymphocytes and decrease leukocyte adhesion. However, little is known about the effects of ATGs on endothelial cells (EC). Our aim was to study the influence of ATGs upon the expression of adhesion molecules on human umbilical vein endothelial cells (HUVECs) after stimulation with tumor necrosis factor (TNF)-alpha. MATERIAL AND METHODS HUVECs obtained from umbilical cords were incubated with ATGs before and after 6-hour stimulation with TNF-alpha. The group incubated without ATG served as the controls. Another group was not stimulated with TNF-alpha. By flow cytometry, we analyzed the expression of several adhesion molecules: intercellular adhesion molecule (ICAM)-1, vascular cell adhesion molecule (VCAM), platelet EC adhesion molecule (PECAM), and CD62E. Statistical analysis used analysis of variance. RESULTS After TNF-alpha stimulation, the EC surface expression of ICAM-1 and CD62E was reduced, although not significantly, in treated as compared with untreated cells. The expression of ICAM-1 and CD62E was similar in the unstimulated groups. The expression of VCAM, PECAM, CD55, and CD58 was not modified by ATG treatment. CONCLUSION Our results demonstrated that ATGs insignificantly reduced the expression of adhesion molecules in HUVECs. The effect of ATGs on stimulated HUVECs remains unclear, probably due to the lack of effector cells.
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Affiliation(s)
- S Walther
- Department of Cardiac Surgery, LM University Hospital, Munich, Germany
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Pfeifer K, Klein U, Chaussy C, Hammer C, Pielsticker K, Haendle H, Lissner J. Postmortale Nierenvergrößerungsangiographie mit fettlöslichem Kontrastmittel. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1229960] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hammer S, Meisner F, Dirschedl P, Fraunberger P, Meiser B, Reichart B, Hammer C. Procalcitonin for differential diagnosis of graft rejection and infection in patients with heart and/or lung grafts. Intensive Care Med 2009. [PMID: 18470717 PMCID: PMC7095472 DOI: 10.1007/s001340051141] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES Investigation of the reliability of Procalcitonin (PCT) for differential diagnosis of acute rejections and non-viral infections in heart and lung transplanted patients. DESIGN Retrospective study. SETTING Transplant intensive care unit (ICU) at a university hospital. PATIENTS 57 heart, 18 lung and 3 heart-lung transplant patients. MEASUREMENTS PCT was measured in plasma samples of heart and lung transplanted patients using a commercial immuno-luminescence assay and was compared with values of C-reactive protein (CRP) and leukocytes (WBC). RESULTS PCT was elevated in patients suffering from bacterial and fungal infections. The magnitude of values was clearly associated with the severity of the infection. Rejections and viral infections did not interfere with the PCT release. CONCLUSION PCT is a reliable predictor with discriminating power for non-viral systemic infections in patients after heart and/or lung transplantation. PCT allows an early differential diagnosis between rejection (AR) and bacterial/fungal infection (IF) and thus a rapid and focused therapeutic intervention. It avoids unnecessary antibiotic treatment which could be toxic for the graft itself in patients with rejection only. PCT provides vital information early to clinicians and allows them to improve the management of bacterial/fungal infections in immunocompromized transplant patients. PCT thus facilitates and improves the outcome of survival rate and the quality of life in the postoperative period of patients with heart and/or lung grafts.
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Affiliation(s)
- S Hammer
- Inst.Surg.Res., Inst.Clin.Chem., Dept.Cardio-Thoracic Surg., IBE, Klinikum Grosshadern, Ludwig-Maximilians-University, D-81366 Munich, Germany
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