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Applebaum N, Chemel S, Matveev S, Pal SS, Sengupta A, Lucas B, Vigodner M. Phosphoproteome analysis of the crosstalk between sumoylation and phosphorylation in mouse spermatocytes. Biochem Biophys Res Commun 2023; 681:194-199. [PMID: 37783117 PMCID: PMC10623373 DOI: 10.1016/j.bbrc.2023.09.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 09/13/2023] [Indexed: 10/04/2023]
Abstract
Spermatogenesis is supported by various posttranslational modifications. There is growing evidence supporting a crosstalk between sumoylation and phosphorylation in different cell types. We have recently shown that inhibition of global sumoylation with a sumoylation inhibitor (Ginkgolic acid, GA) arrested purified mouse spermatocytes in vitro; the spermatocytes could not condense chromatin and disassemble the synaptonemal complex. Our data have also revealed that some kinases regulating the meiotic prophase (PLK1 and AURKB) were inhibited upon the inhibition of sumoylation. Nevertheless, specific phosphorylated targets affected by the inhibition of sumoylation have not been identified. To address this gap, in this study, we performed a comparative phospho-proteome analysis of the control spermatocytes and spermatocytes treated with the GA. Our analysis has narrowed down to several proteins implicated in the regulation of cell cycle and/or meiosis. Two of these targets, NPM1 and hnRNPH1, were studied further using western blotting in both cell lines and primary cells. Decrease in sumoylaion-dependend phosphorylation of NPM1 on Ser125 regulated by AURKB can be a contributing factor to the inability of spermatocytes to condense chromatin by the end of the prophase and should be studied further.
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Affiliation(s)
- Noa Applebaum
- Department of Biology, Stern College, Yeshiva University, New York, NY, 10016, USA
| | - Sara Chemel
- Department of Biology, Stern College, Yeshiva University, New York, NY, 10016, USA
| | - Shaina Matveev
- Department of Biology, Stern College, Yeshiva University, New York, NY, 10016, USA
| | - Sayanto Subrato Pal
- Department of Biology, Stern College, Yeshiva University, New York, NY, 10016, USA; Biotechnology Management and Entrepreneurship Program, Katz School of Science and Health, Yeshiva University, New York, NY, 10016, USA
| | - Amitabha Sengupta
- Department of Biology, Stern College, Yeshiva University, New York, NY, 10016, USA
| | - Benjamin Lucas
- Department of Biology, Stern College, Yeshiva University, New York, NY, 10016, USA
| | - Margarita Vigodner
- Department of Biology, Stern College, Yeshiva University, New York, NY, 10016, USA; Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY, 10461, USA.
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Lucas B, Lippisch R, Pliske G, Piatek S, Walcher F. [Conservative management of distal radius fractures]. Unfallchirurgie (Heidelb) 2023; 126:227-237. [PMID: 36881137 DOI: 10.1007/s00113-023-01293-1] [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] [Subscribe] [Scholar Register] [Accepted: 01/09/2023] [Indexed: 03/08/2023]
Abstract
Distal radius fractures are the third most frequent fractures in Germany. The decision for conservative treatment and the weighing up of surgical treatment need an exact consideration of the indications based on instability criteria and the extent of possible articular involvement. Indications for an emergency operation must be excluded. In cases of stable fractures or multimorbid patients in a poor general condition conservative treatment is indicated. The principles for a successful treatment are the precise reduction and stable retention in a plaster splint. In the further course, fractures are closely monitored by biplanar radiography. This is necessary to rule out a secondary displacement until the swelling of the soft tissues has subsided and the plaster splint is changed to a circular cast approximately 11 days after the traumatic event. The total duration of immobilization is 4 weeks. Physiotherapy and ergotherapy including adjacent joints, starts after 2 weeks of treatment. This treatment is extended to the wrist after removal of the circular cast.
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Affiliation(s)
- Benjamin Lucas
- Universitätsklinik für Unfallchirurgie, Medizinische Fakultät der Otto-von-Guericke-Universität Magdeburg, Magdeburg, Deutschland.
| | - Roland Lippisch
- Universitätsklinik für Unfallchirurgie, Medizinische Fakultät der Otto-von-Guericke-Universität Magdeburg, Magdeburg, Deutschland
| | - Gerald Pliske
- Universitätsklinik für Unfallchirurgie, Medizinische Fakultät der Otto-von-Guericke-Universität Magdeburg, Magdeburg, Deutschland
| | - Stefan Piatek
- Universitätsklinik für Unfallchirurgie, Medizinische Fakultät der Otto-von-Guericke-Universität Magdeburg, Magdeburg, Deutschland
| | - Felix Walcher
- Universitätsklinik für Unfallchirurgie, Medizinische Fakultät der Otto-von-Guericke-Universität Magdeburg, Magdeburg, Deutschland
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Karimzadeh M, Ngo T, Lucas B, Zoraghein H. Forecasting COVID-19 and Other Infectious Diseases for Proactive Policy: Artificial Intelligence Can Help. J Urban Health 2023; 100:7-10. [PMID: 36689140 PMCID: PMC9869836 DOI: 10.1007/s11524-022-00714-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/23/2022] [Indexed: 01/24/2023]
Affiliation(s)
- Morteza Karimzadeh
- Department of Geography, Institute of Behavioral Science, University of Colorado Boulder, Boulder, CO, USA.
| | - Thoai Ngo
- Population Council, New York, NY, USA
| | - Benjamin Lucas
- Department of Geography, Institute of Behavioral Science, University of Colorado Boulder, Boulder, CO, USA
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Lucas B, Meng M, Schirrmeister W, Pliske G, Walcher F, Schüttrumpf JP. Lessons learned during the sliding gantry CT implementation in a trauma suite. Eur J Trauma Emerg Surg 2022:10.1007/s00068-022-02080-0. [PMID: 35988107 DOI: 10.1007/s00068-022-02080-0] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Accepted: 08/08/2022] [Indexed: 11/24/2022]
Abstract
PURPOSE Early detection of bleeding is important for managing trauma cases in the emergency department (ED). Several trauma suites are equipped with computed tomography (CT) scanners to reduce the time to CT. In the last decade, sliding gantry CT has been implemented in trauma suites, highlighting conventional techniques' advantages. We investigated the change in the time to CT and the challenges faced during the implementation. METHODS Trauma suite treatments with a conventional CT scanner between January and December 2016 formed the control group. From January to April 2017, trauma suites were modified, and treatment was outsourced to an interim trauma suite. By May 2017, trauma suites were equipped with a sliding gantry CT scanner. Treatments from May to July 2017 formed the transition group, and those from August to December 2017 formed the routine use group. We evaluated the time to CT in all groups and considered the reasons for the delays in the transition and routine use groups. RESULTS On sliding gantry CT implementation, although time to CT remained unaffected in the transition group, it significantly reduced in the routine use group, independent of injury severity score. The incidence of cable management problems was significantly higher in the latter group. CONCLUSIONS We have demonstrated a decrease in the time to CT with the implementation of a sliding gantry CT. However, due to a higher number of cable management problems in the routine use group, we recommend regular refresher team training with routine use.
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Affiliation(s)
- Benjamin Lucas
- Department of Trauma Surgery, Otto-Von-Guericke University Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Germany.
| | - Matthias Meng
- Department of Trauma Surgery, Otto-Von-Guericke University Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Germany
| | - Wiebke Schirrmeister
- Department of Trauma Surgery, Otto-Von-Guericke University Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Germany
| | - Gerald Pliske
- Department of Trauma Surgery, Otto-Von-Guericke University Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Germany
| | - Felix Walcher
- Department of Trauma Surgery, Otto-Von-Guericke University Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Germany
| | - Jan Philipp Schüttrumpf
- Department of Trauma Surgery, Otto-Von-Guericke University Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Germany
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Lucas B, Hempel D, Otto R, Brenner F, Stier M, Marzi I, Breitkreutz R, Walcher F. Prehospital FAST reduces time to admission and operative treatment: a prospective, randomized, multicenter trial. Eur J Trauma Emerg Surg 2022; 48:2701-2708. [PMID: 34661691 PMCID: PMC9360060 DOI: 10.1007/s00068-021-01806-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 10/07/2021] [Indexed: 11/25/2022]
Abstract
BACKGROUND The focused assessment with sonography in trauma (FAST) exam is an established trauma care diagnostic procedure. Ultrasound performed during prehospital care can improve early treatment and management of the patients. In this prospective randomized clinical trial, we wanted to assess whether a pre-hospital FAST (p-FAST) influences pre-hospital strategy and the time to operative treatment. METHODS We studied 296 trauma victims in a prehospital setting. Inclusion criteria were potential abdominal injuries identified either by clinical examination or suggested by the mechanism of injury. Physician-staffed helicopters and emergency ambulances were equipped with portable ultrasound devices. According to a scheme related to calendar weeks, a clinical exam only (CEX) or a clinical exam together with a p-FAST (CEX-p-FAST) was conducted. Outcome variables were prehospital diagnosis and strategy, the time to admission to the trauma room and to operation theater. The study was approved by the university ethical committee (REB#: 46/06). RESULTS CEX-p-FAST showed a high sensitivity (94.7%) and specificity (97.6%) in detection of free fluid compared to CEX-only (80.0%, 84.4%). The median time to admission was reduced significantly by 13 min and to operative treatment by 15 min after CEX-p-FAST. We observed a cross-over rate of 30.8% of p-FAST (n = 36) to CEX-p-FAST during the CEX-only weeks. CONCLUSION According to the experience of the principal investigators, CEX-p-FAST was superior to CEX-only. Despite the time needed for p-FAST, the relevant admission time was significantly shorter. Thus, p-FAST is recommended in addition to CEX if possible for decision-making in prehospital trauma care. TRIAL REGISTRATION German Clinical Trials Register #DRKS00022117-Registered 10 July 2020-Retrospectively registered, https://www.drks.de/drks_web/navigate.do?navigationId=trial.HTML&TRIAL_ID=DRKS00022117 .
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Affiliation(s)
- Benjamin Lucas
- Department of Trauma Surgery, Otto-Von-Guericke University Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Germany.
| | - Dorothea Hempel
- Central Emergency with Admission Ward, Otto-Von-Guericke University Magdeburg, Magdeburg, Germany
- Clinic of Nephrology and Hypertension, Diabetes and Endocrinology, Otto-Von-Guericke University Magdeburg, Magdeburg, Germany
- Emergency Department, Asklepios Klinik Wandsbek, Alphonsstr. 14, 22043, Hamburg, Germany
| | - Ronny Otto
- Department of Trauma Surgery, Otto-Von-Guericke University Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Germany
| | - Franziska Brenner
- Department of Trauma Surgery, Johann Wolfgang Goethe-University, Frankfurt, Germany
- Department of Hand Surgery, Agaplesion Diakonieklinikum Hamburg Gemeinnützige GmbH, Hamburg, Germany
| | - Mario Stier
- Department of Trauma Surgery, Johann Wolfgang Goethe-University, Frankfurt, Germany
| | - Ingo Marzi
- Department of Trauma Surgery, Johann Wolfgang Goethe-University, Frankfurt, Germany
| | - Raoul Breitkreutz
- Institute for Health and Social (IfGS), FOM University of Economy and Management, Frankfurt Campus, Frankfurt, Germany
| | - Felix Walcher
- Department of Trauma Surgery, Otto-Von-Guericke University Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Germany
- Department of Trauma Surgery, Johann Wolfgang Goethe-University, Frankfurt, Germany
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Jiménez E, Brotherton V, Gardner A, Wright N, Browne H, Esiovwa N, Dang M, Wyman E, Bravo‐Balsa L, Lucas B, Gul M, Such E, Trodd Z. The unequal impact of Covid-19 on the lives and rights of the children of modern slavery survivors, children in exploitation and children at risk of entering exploitation. Child Soc 2022; 37:CHSO12572. [PMID: 35602419 PMCID: PMC9111646 DOI: 10.1111/chso.12572] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 03/08/2022] [Accepted: 03/29/2022] [Indexed: 06/15/2023]
Abstract
This article discusses the unequal impact of Covid-19 on the lives of the children of survivors of modern slavery, child victims of exploitation and children at risk of exploitation in the UK. It draws on research that has analysed the risks and impacts of Covid-19 on victims and survivors of modern slavery. It explores how pandemic responses may have hindered these children's rights to education, food, safety, development and participation and representation in legal processes. It suggests that the pandemic should be used as an impetus to address inequalities that existed pre-Covid-19 and those that have been exacerbated by it.
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Affiliation(s)
- Erika Jiménez
- University of NottinghamUK
- Present address:
Queen's UniversityUK
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Lucas B, Mathieu SC, Pliske G, Schirrmeister W, Kulla M, Walcher F. The impact of a qualified medical documentation assistant on trauma room management. Eur J Trauma Emerg Surg 2022; 48:689-696. [PMID: 33025169 PMCID: PMC8825361 DOI: 10.1007/s00068-020-01513-y] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Accepted: 09/25/2020] [Indexed: 11/26/2022]
Abstract
PURPOSE To improve quality of trauma room management, intra- and inter-hospital benchmarking are important tools. However, primary data quality is crucial for benchmarking reliability. In this study, we analyzed the effect of a medical documentation assistant on documentation completeness in trauma room management in comparison to documentation by physicians involved in direct patient treatment. METHODS We included all patients treated in the trauma room from 2016/01/01 to 2016/12/31 that were documented with the trauma module of the German Emergency Department Medical Record V2015.1. We divided the data into documentation by medical documentation assistant (DA, 07:00 to 17:00), physician in daytime (PD, 07:00 to 17:00), and physician at night (PN, 17:00 to 07:00). Data were analyzed for completeness (primary outcome parameter) as well as diagnostic intervals. RESULTS There was a significant increase in complete recorded data for DA (74.5%; IQR 14.5%) compared to PD (26.9%; IQR 18.7%; p < 0.001) and PN (30.8%; IQR 18.9; p < 0.001). The time to whole-body computed tomography (WBCT) significantly decreased for DA (19 min; IQR 8.3) compared to PD (24 min; IQR 12.8; p = 0.007) or PN (24.5 min; IQR 10.0; p = 0.001). CONCLUSION In presence of a qualified medical documentation assistant, data completeness and time to WBCT improved significantly. Therefore, utilizing a professional DA in the trauma room appears beneficial for data quality and time management.
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Affiliation(s)
- Benjamin Lucas
- Department of Trauma Surgery, Otto-Von-Guericke University Magdeburg, Leipziger Str. 44, 39120 Magdeburg, Germany
| | - Sophie-Cecil Mathieu
- Department of Trauma Surgery, Otto-Von-Guericke University Magdeburg, Leipziger Str. 44, 39120 Magdeburg, Germany
- Department of Orthopaedic Surgery, Otto-Von-Guericke University Magdeburg, 39120 Magdeburg, Germany
| | - Gerald Pliske
- Department of Trauma Surgery, Otto-Von-Guericke University Magdeburg, Leipziger Str. 44, 39120 Magdeburg, Germany
| | - Wiebke Schirrmeister
- Department of Trauma Surgery, Otto-Von-Guericke University Magdeburg, Leipziger Str. 44, 39120 Magdeburg, Germany
| | - Martin Kulla
- Department of Anaesthesiology, Intensive Care Medicine, Emergency Medicine and Pain Therapy, Bundeswehrhospital Ulm, Oberer Eselsberg 40, 89081 Ulm, Germany
| | - Felix Walcher
- Department of Trauma Surgery, Otto-Von-Guericke University Magdeburg, Leipziger Str. 44, 39120 Magdeburg, Germany
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Lucas B, Vahedi B, Karimzadeh M. A spatiotemporal machine learning approach to forecasting COVID-19 incidence at the county level in the USA. Int J Data Sci Anal 2022; 15:247-266. [PMID: 35071733 PMCID: PMC8760128 DOI: 10.1007/s41060-021-00295-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 11/19/2021] [Indexed: 01/06/2023]
Abstract
With COVID-19 affecting every country globally and changing everyday life, the ability to forecast the spread of the disease is more important than any previous epidemic. The conventional methods of disease-spread modeling, compartmental models, are based on the assumption of spatiotemporal homogeneity of the spread of the virus, which may cause forecasting to underperform, especially at high spatial resolutions. In this paper, we approach the forecasting task with an alternative technique-spatiotemporal machine learning. We present COVID-LSTM, a data-driven model based on a long short-term memory deep learning architecture for forecasting COVID-19 incidence at the county level in the USA. We use the weekly number of new positive cases as temporal input, and hand-engineered spatial features from Facebook movement and connectedness datasets to capture the spread of the disease in time and space. COVID-LSTM outperforms the COVID-19 Forecast Hub's Ensemble model (COVIDhub-ensemble) on our 17-week evaluation period, making it the first model to be more accurate than the COVIDhub-ensemble over one or more forecast periods. Over the 4-week forecast horizon, our model is on average 50 cases per county more accurate than the COVIDhub-ensemble. We highlight that the underutilization of data-driven forecasting of disease spread prior to COVID-19 is likely due to the lack of sufficient data available for previous diseases, in addition to the recent advances in machine learning methods for spatiotemporal forecasting. We discuss the impediments to the wider uptake of data-driven forecasting, and whether it is likely that more deep learning-based models will be used in the future.
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Affiliation(s)
- Benjamin Lucas
- Department of Geography, University of Colorado Boulder, Boulder, CO USA
| | - Behzad Vahedi
- Department of Geography, University of Colorado Boulder, Boulder, CO USA
| | - Morteza Karimzadeh
- Department of Geography, University of Colorado Boulder, Boulder, CO USA
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Keilhoff G, Ludwig C, Pinkernelle J, Lucas B. Effects of Gynostemma pentaphyllum on spinal cord motor neurons and microglial cells in vitro. Acta Histochem 2021; 123:151759. [PMID: 34425524 DOI: 10.1016/j.acthis.2021.151759] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/25/2021] [Accepted: 07/11/2021] [Indexed: 11/18/2022]
Abstract
The regenerative capability of spinal cord neurons is limited to impossible. Thus, experimental approaches supporting reconstruction/regeneration are in process. This study focused on the evaluation of the protective potency of an extract from Gynostemma pentaphyllum (GP), a plant used in traditional medicine with anti-oxidative and neuroprotective activities, in vitro on organotypic spinal cord cultures, the motor-neuron-like NSC-34 cell line and the microglial cell line BV-2. Organotypic cultures were mechanically stressed by the slicing procedure and the effect of GP on motor neuron survival and neurite sprouting was tested by immunohistochemistry. NSC-34 cells were neuronal differentiated by using special medium. Afterwards, cell survival (propidium iodide/fluorescein diacetate labeling), proliferation (BrdU-incorporation), and neurite sprouting were evaluated. BV-2 cells were stimulated with LPS/interferon γ and subjected to migration assay and nanoparticle uptake. Cell survival, proliferation and the expression pattern of different microglial activation markers (cFOS, iNOS) as well as transcription factors (PPARγ, YB1) were analyzed. In organotypic cultures, high-dose GP supported survival of motor neurons and especially of the neuronal fiber network. Despite reduced neurodegeneration, however, there was a GP-mediated activation of astro- and microglia. In NSC-34 cells, high-dosed GP had degenerative and anti-proliferative effects, but only in normal medium. Moreover, GP supported the neuro-differentiation ability. In BV-2 cells, high-dosed GP was toxic. In lower dosages, GP affected cell survival and proliferation when combined with LPS/interferon γ. Nanoparticle uptake, migration ability, and the transcription factor PPARγ, however, GP affected directly. The data suggest positive effects of GP on injured spinal motor neurons. Moreover, GP activated microglial cells. The dual role of microglia (protective/detrimental) in neurodegenerative processes required further experiments to enhance the knowledge about GP effects. Therefore, a possible clinical use of GP in spinal cord injuries is still a long way off.
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Affiliation(s)
- Gerburg Keilhoff
- Institute of Biochemistry and Cell Biology, Medical Faculty, Otto-von-Guericke University Magdeburg, Germany.
| | - Christina Ludwig
- Institute of Biochemistry and Cell Biology, Medical Faculty, Otto-von-Guericke University Magdeburg, Germany
| | - Josephine Pinkernelle
- Institute of Biochemistry and Cell Biology, Medical Faculty, Otto-von-Guericke University Magdeburg, Germany
| | - Benjamin Lucas
- Dept. of Trauma Surgery, Medical Faculty, Otto-von-Guericke University Magdeburg, Germany
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Lucas B, Francu RE, Goulding J, Harvey J, Nica-Avram G, Perrat B. A Note on Data-driven Actor-differentiation and SDGs 2 and 12: Insights from a Food-sharing App. Research Policy 2021. [DOI: 10.1016/j.respol.2021.104266] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Lucas B, Pelletier C, Schmidt D, Webb GI, Petitjean F. A Bayesian-inspired, deep learning-based, semi-supervised domain adaptation technique for land cover mapping. Mach Learn 2021. [DOI: 10.1007/s10994-020-05942-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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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Lucas B, Riebau C, Mohr J, Pliske G, Walcher F, Piatek S. Effect of 4DryField® PH on blood loss in hip bipolar hemiarthroplasty following intracapsular femoral neck fracture - a randomized clinical trial. BMC Musculoskelet Disord 2021; 22:113. [PMID: 33499843 PMCID: PMC7836593 DOI: 10.1186/s12891-021-03983-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 01/17/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND One of the most common complications of hip arthroplasty is excessive blood loss that could necessitate allogenic blood transfusion, which is further associated with other complications, such as infections, transfusion reactions or immunomodulation. In gynecology, 4DryField®PH, an absorbable polysaccharide-based formulation, is used for hemostasis and adhesion prophylaxis. In this study, we evaluated its hemostatic effect in patients undergoing hip bipolar hemiarthroplasty following intracapsular femoral neck fracture. METHODS We studied 40 patients with intracapsular femoral neck fractures (Garden III or IV) admitted at our institution between July 2016 and November 2017. We included patients above 60 years with simple fracture and without pathologic fractures. Patients were randomized into intervention and control groups. The intervention group received 5 g of 4DryField® PH (subfascially and subcutaneously) during wound closure. Three drainages were inserted in a standardized manner (submuscular, subfascial, and subcutaneous) and drainage volume was measured immediately before extraction. Total blood loss was calculated using Mercuriali's formula and standard hemograms upon admission and five days after surgery. Volume of postoperative hematoma was measured using point-of-care ultrasound seven days after surgery. RESULTS Volume of the postoperative hematoma was reduced by 43.0 mL. However, significant reduction of total blood loss and drainage volume was not observed. CONCLUSIONS We observed that 4DryField® PH had a local hemostatic effect, thereby reducing volume of the postoperative hematoma. However, this reduction was small and had no effect on the total blood loss. Further studies are warranted to improve the application algorithm. TRIAL REGISTRATION DRKS, DRKS00017452 , Registered 11 June 2019 - Retrospectively registered.
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Affiliation(s)
- Benjamin Lucas
- Department of Trauma Surgery, Otto-von-Guericke University Magdeburg, Leipziger Str. 44, D-39120, Magdeburg, Germany.
| | - Christian Riebau
- Department of Trauma Surgery, Otto-von-Guericke University Magdeburg, Leipziger Str. 44, D-39120, Magdeburg, Germany
| | - Juliane Mohr
- Department of Trauma Surgery, Otto-von-Guericke University Magdeburg, Leipziger Str. 44, D-39120, Magdeburg, Germany
| | - Gerald Pliske
- Department of Trauma Surgery, Otto-von-Guericke University Magdeburg, Leipziger Str. 44, D-39120, Magdeburg, Germany
| | - Felix Walcher
- Department of Trauma Surgery, Otto-von-Guericke University Magdeburg, Leipziger Str. 44, D-39120, Magdeburg, Germany
| | - Stefan Piatek
- Department of Trauma Surgery, Otto-von-Guericke University Magdeburg, Leipziger Str. 44, D-39120, Magdeburg, Germany
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Vigodner M, Lucas B, Kemeny S, Schwartz T, Levy R. Identification of sumoylated targets in proliferating mouse spermatogonia and human testicular seminomas. Asian J Androl 2020; 22:569-577. [PMID: 32217837 PMCID: PMC7705977 DOI: 10.4103/aja.aja_11_20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Accepted: 01/17/2020] [Indexed: 11/19/2022] Open
Abstract
Spermatogenesis is regulated by a complex network of posttranslation modifications. Sumoylation (a modification by small ubiquitin-like modifiers, or SUMO proteins) was identified as an important cellular event in different cell types. SUMO proteins are highly expressed in the testis, and their role during spermatogenesis has begun to be elucidated. Given the important role of sumoylation in the regulation of mitosis and cancer progression in other tissues, the aim of the current study was to identify the targets of SUMO in proliferating mouse spermatogonia and human seminoma tissues and to initially examine the level of sumoylation in relation to the proliferative activity of the tissues. Using freshly purified spermatogonia and C18-4 spermatogonia cell line, mass spectrometry analysis identified several SUMO targets implicated into the proliferation of spermatogonia (such as heat shock protein 60 [HSP60] and prohibitin). Tissue array and western blot approaches showed that SUMO expression is a prominent feature of human seminomas and that the proliferative activity of the tumor tissues was positively correlated with the level of SUMO expression. Downregulation of sumoylation with si-RNA was not sufficient to significantly affect the proliferation of C18-4 spermatogonia; however, SUMO overexpression increased the proliferation rate of the cells. These data suggest that cells are more sensitive to an elevated level of SUMO, and that this situation may lead to an upregulated cellular proliferation and, possibly, cancer. Mass spectrometry analysis identified around a hundred SUMO targets in seminoma samples. Notably, many of the identified proteins (such as proliferating cell nuclear antigen [PCNA], DNA topoisomerase 2-alpha [Top2A], prohibitin, 14-3-3 protein, and others) were implicated in oncogenic transformation and cancer progression.
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Affiliation(s)
- Margarita Vigodner
- Department of Biology, Stern College, Yeshiva University, New York, NY 10016, USA
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Benjamin Lucas
- Department of Biology, Stern College, Yeshiva University, New York, NY 10016, USA
| | - Stav Kemeny
- Department of Biology, Stern College, Yeshiva University, New York, NY 10016, USA
| | - Tamar Schwartz
- Department of Biology, Stern College, Yeshiva University, New York, NY 10016, USA
| | - Rebecca Levy
- Department of Biology, Stern College, Yeshiva University, New York, NY 10016, USA
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de La Motte Rouge T, Bengrine Lefevre L, Mouret-Reynier MA, Asselain B, Lucas B, Gavoille C, Cornila C, Spaeth D, Colomba E, Patsouris A, Fabbro M, Chakiba C, Toussaint P, Simon H, Berton D, Garbay D, Garnier Tixidre C, Coeffic D, Collard O, Lefeuvre-Plesse C. 823P Extended follow-up of a real-world cohort of patients (pts) with BRCA mutation (BRCAm) relapsed epithelial ovarian cancer (EOC) receiving olaparib maintenance therapy: The GINECO RETROLA study. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.962] [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] Open
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Sanson F, Pandey AK, Papagiannouli I, Harms F, Dovillaire G, Baynard E, Demailly J, Guilbaud O, Lucas B, Neveu O, Pittman M, Ros D, Richardson M, Johnson E, Li W, Balcou P, Kazamias S. Highly multimodal structure of high topological charge extreme ultraviolet vortex beams. Opt Lett 2020; 45:4790-4793. [PMID: 32870858 DOI: 10.1364/ol.397206] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 07/28/2020] [Indexed: 06/11/2023]
Abstract
Optical beams carrying orbital angular momentum are a very active field of research for their prospective applications, especially at short wavelengths. We consider here such beams produced through high-harmonic generation (HHG) in a rare gas and analyze the characterization of their high-charge vortex structure by an extreme ultraviolet Hartmann wavefront sensor. We show that such HHG beams are generally composed of a set of numerous vortex modes. The sensitivity of the intensity and phase of the HHG beam to the infrared laser aberrations is investigated using a deformable mirror.
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Keilhoff G, Mbou RP, Lucas B. Differentiation of NSC-34 cells is characterized by expression of NGF receptor p75, glutaminase and NCAM L1, activation of mitochondria, and sensitivity to fatty acid intervention. Acta Histochem 2020; 122:151574. [PMID: 32622426 DOI: 10.1016/j.acthis.2020.151574] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 05/25/2020] [Accepted: 06/05/2020] [Indexed: 01/06/2023]
Abstract
Motor neuronal damage due to diseases, traumatic insults or de-afferentation of the spinal cord is often incurable because of poor intrinsic regenerative capacity. Hence, medical basic research has to provide a better understanding of development-/regeneration-related cellular processes as only way to develop new and successful therapeutic strategies. Here, we investigated the neuronal differentiation of the NSC-34 hybrid cell line, which is an accepted model for spinal cord motor neurons. Their differentiation was stimulated by switching from normal to differentiation medium and by supplementation with palmitic and oleic acid. To characterize neuro-differentiation of NSC-34 cells, expression of nicotinic acetylcholine receptor alpha 4, NGF p75 receptor, IGF I alpha receptor, glutaminase, NCAM L1, ADAM10 and myelin basic protein as well as activation of mitochondria were analyzed. Both switch from normal to differentiation medium and fatty acid application stimulated NSC-34 differentiation. Differentiation was characterized by diminishing expression of the nicotinic acetylcholine receptor alpha 4 and enhancing expression of the NGF receptor p75, of glutaminase, of NCAM L1 and it's partially transformation from the cell surface into the cell. Fatty acid intervention stabilized the expression of the nicotinic acetylcholine receptor alpha 4, diminished the expression of the NGF receptor p75, consolidated the expression profile of NCAM L1, and intensified the expression of the relevant for NCAM L1 cleavage ADAM10. However, NCAM L1 cleavage itself was unaffected by fatty acid intervention, as was the differentiation-relevant activation of mitochondria and their transformation into neuronal filopodia.
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Keilhoff G, Titze M, Rathert H, Lucas B, Esser T, Ebmeyer U. Normoxic post-ROSC ventilation delays hippocampal CA1 neurodegeneration in a rat cardiac arrest model, but does not prevent it. Exp Brain Res 2020; 238:807-824. [PMID: 32125470 DOI: 10.1007/s00221-020-05746-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 02/03/2020] [Indexed: 01/21/2023]
Abstract
The European Resuscitation Guidelines recommend that survivors of cardiac arrest (CA) be resuscitated with 100% O2 and undergo subsequent-post-return of spontaneous circulation (ROSC)-reduction of O2 supply to prevent hyperoxia. Hyperoxia produces a "second neurotoxic hit," which, together with the initial ischemic insult, causes ischemia-reperfusion injury. However, heterogeneous results from animal studies suggest that normoxia can also be detrimental. One clear reason for these inconsistent results is the considerable heterogeneity of the models used. In this study, the histological outcome of the hippocampal CA1 region following resuscitation with 100% O2 combined with different post-ROSC ventilation regimes (21%, 50%, and 100% O2) was investigated in a rat CA/resuscitation model with survival times of 7 and 21 days. Immunohistochemical stainings of NeuN, MAP2, GFAP, and IBA1 revealed a neuroprotective potency of post-ROSC ventilation with 21% O2, although it was only temporary. This limitation should be because of the post-ROSC intervention targeting only processes of ischemia-induced secondary injury. There were no ventilation-dependent effects on either microglial activation, reduction of which is accepted as being neuroprotective, or astroglial activation, which is accepted as being able to enhance neurons' resistance to ischemia/reperfusion injury. Furthermore, our findings verify the limited comparability of animal studies because of the individual heterogeneity of the animals, experimental regimes, and evaluation procedures used.
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Affiliation(s)
- Gerburg Keilhoff
- Institute of Biochemistry and Cell Biology, Medical Faculty, University of Magdeburg, Leipziger Strasse 44, 39120, Magdeburg, Germany.
| | - Maximilian Titze
- Institute of Biochemistry and Cell Biology, Medical Faculty, University of Magdeburg, Leipziger Strasse 44, 39120, Magdeburg, Germany
| | - Henning Rathert
- Institute of Biochemistry and Cell Biology, Medical Faculty, University of Magdeburg, Leipziger Strasse 44, 39120, Magdeburg, Germany
| | - Benjamin Lucas
- Department of Trauma Surgery, Medical Faculty, University of Magdeburg, Magdeburg, Germany
| | - Torben Esser
- Department of Anesthesiology, Medical Faculty, University of Magdeburg, Magdeburg, Germany
| | - Uwe Ebmeyer
- Department of Anesthesiology, Medical Faculty, University of Magdeburg, Magdeburg, Germany
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Lucas B, Schirrmeister W, Pliske G, Leenen M, Walcher F, Kopschina C. Existence and role of standard operating procedures in the emergency department : A national online survey. Med Klin Intensivmed Notfmed 2019; 116:50-55. [PMID: 31811310 DOI: 10.1007/s00063-019-00642-6] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Revised: 10/01/2019] [Accepted: 10/26/2019] [Indexed: 10/25/2022]
Abstract
BACKGROUND In recent years, increases in the number of patients in emergency departments (ED) have led to continuous work intensification. To handle this problem, the treatment effectiveness has to be maximized. One strategy that may help to optimize workflow is the use of standard operating procedures (SOPs). We investigated the existence of SOPs and subjective effects on treatment in German EDs. METHODS We performed an online survey from February 2015 until June 2016. We collected data regarding the existence of SOPs, health care level, medical field, work experience, and education. All professional groups participating in the treatment of patients were requested to take part in the survey. RESULTS Seventy-five percent of the 589 participants in the survey confirmed the existence of SOPs in their EDs. SOPs were more frequently available in hospitals with higher health care levels. Participants working in EDs without SOPs felt less confident regarding treatment of patients. More than 85% of these participants were in favor of having SOPs. The absence of SOPs was associated with a subjective delay in patient treatment. CONCLUSION Most of the EDs had available SOPs. In departments without SOPs, most physicians wanted them to be implemented. SOPs seemed adequate in terms of supporting workflow and satisfaction with patients' treatment.
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Affiliation(s)
- Benjamin Lucas
- Department of Trauma Surgery, Otto-Von-Guericke University Magdeburg, Leipziger Straße 44, 39120, Magdeburg, Germany.
| | - Wiebke Schirrmeister
- Department of Trauma Surgery, Otto-Von-Guericke University Magdeburg, Leipziger Straße 44, 39120, Magdeburg, Germany
| | - Gerald Pliske
- Department of Trauma Surgery, Otto-Von-Guericke University Magdeburg, Leipziger Straße 44, 39120, Magdeburg, Germany
| | - Michael Leenen
- Emergency Department, Community Hospital Nettetal GmbH, Sassenfelder Kirchweg 1, 41334, Nettetal, Germany
| | - Felix Walcher
- Department of Trauma Surgery, Otto-Von-Guericke University Magdeburg, Leipziger Straße 44, 39120, Magdeburg, Germany
| | - Carsten Kopschina
- Department of Trauma and Orthopaedic Surgery, Hospital Lauf a.d. Pegnitz, Krankenhäuser Nürnberger Land GmbH, Simonshofer Straße 55, 91207, Lauf an der Pegnitz, Germany
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Lucas B, Weidert S, Krause M, Rickert M, Walcher F, Reppenhagen S. OP-Simulationen, 3-D-Druck und Virtual Reality in der chirurgischen Weiterbildung. Z Orthop Unfall 2019; 157:622-625. [PMID: 31794992 DOI: 10.1055/a-1020-7736] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Benjamin Lucas
- Universitätsklinik für Unfallchirurgie, Medizinische Fakultät der Otto-von-Guericke-Universität Magdeburg
| | - Simon Weidert
- Klinik für Allgemeine, Unfall- und Wiederherstellungschirurgie, Klinikum der Universität München
| | - Matthias Krause
- Klinik und Poliklinik für Unfall-, Hand- und Wiederherstellungschirurgie, Universitätsklinikum Hamburg-Eppendorf
| | - Markus Rickert
- Klinik und Poliklinik für Orthopädie und Orthopädische Chirurgie, Universitätsklinikum Gießen und Marburg GmbH, Gießen
| | - Felix Walcher
- Universitätsklinik für Unfallchirurgie, Medizinische Fakultät der Otto-von-Guericke-Universität Magdeburg
| | - Stephan Reppenhagen
- Orthopädische Klinik König-Ludwig-Haus, Lehrstuhl für Orthopädie der Julius-Maximilians-Universität Würzburg
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Gomes G, Romano L, Frolich D, Lucas B, Lorena L, Paixão A, Deutekom M, Krose B, Dourado V, Castro P. Tailoring digital apps to support active ageing in a low income community. J Sci Med Sport 2019. [DOI: 10.1016/j.jsams.2019.08.094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Saoura M, Powell CA, Kopajtich R, Alahmad A, AL‐Balool HH, Albash B, Alfadhel M, Alston CL, Bertini E, Bonnen PE, Bratkovic D, Carrozzo R, Donati MA, Di Nottia M, Ghezzi D, Goldstein A, Haan E, Horvath R, Hughes J, Invernizzi F, Lamantea E, Lucas B, Pinnock K, Pujantell M, Rahman S, Rebelo‐Guiomar P, Santra S, Verrigni D, McFarland R, Prokisch H, Taylor RW, Levinger L, Minczuk M. Mutations in ELAC2 associated with hypertrophic cardiomyopathy impair mitochondrial tRNA 3'-end processing. Hum Mutat 2019; 40:1731-1748. [PMID: 31045291 PMCID: PMC6764886 DOI: 10.1002/humu.23777] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 04/09/2019] [Accepted: 04/29/2019] [Indexed: 12/16/2022]
Abstract
Mutations in either the mitochondrial or nuclear genomes are associated with a diverse group of human disorders characterized by impaired mitochondrial respiration. Within this group, an increasing number of mutations have been identified in nuclear genes involved in mitochondrial RNA metabolism, including ELAC2. The ELAC2 gene codes for the mitochondrial RNase Z, responsible for endonucleolytic cleavage of the 3' ends of mitochondrial pre-tRNAs. Here, we report the identification of 16 novel ELAC2 variants in individuals presenting with mitochondrial respiratory chain deficiency, hypertrophic cardiomyopathy (HCM), and lactic acidosis. We provide evidence for the pathogenicity of the novel missense variants by studying the RNase Z activity in an in vitro system. We also modeled the residues affected by a missense mutation in solved RNase Z structures, providing insight into enzyme structure and function. Finally, we show that primary fibroblasts from the affected individuals have elevated levels of unprocessed mitochondrial RNA precursors. Our study thus broadly confirms the correlation of ELAC2 variants with severe infantile-onset forms of HCM and mitochondrial respiratory chain dysfunction. One rare missense variant associated with the occurrence of prostate cancer (p.Arg781His) impairs the mitochondrial RNase Z activity of ELAC2, suggesting a functional link between tumorigenesis and mitochondrial RNA metabolism.
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Affiliation(s)
| | | | - Robert Kopajtich
- Genetics of Mitochondrial Disorders, Institute of Human GeneticsTechnische Universität MünchenMunichGermany
- Genetics of Mitochondrial Disorders, Institute of Human GeneticsHelmholtz Zentrum MünchenNeuherbergGermany
| | - Ahmad Alahmad
- Wellcome Centre for Mitochondrial Research, Institute of NeuroscienceNewcastle UniversityNewcastle upon TyneUK
- Kuwait Medical Genetics CenterKuwait CityKuwait
| | | | | | - Majid Alfadhel
- Genetics Division, Department of Pediatrics, King Abdullah International Medical Research CentreKing Saud bin Abdulaziz University for Health SciencesRiyadhSaudi Arabia
| | - Charlotte L. Alston
- Wellcome Centre for Mitochondrial Research, Institute of NeuroscienceNewcastle UniversityNewcastle upon TyneUK
| | - Enrico Bertini
- Department of Neurosciences, Unit of Muscular and Neurodegenerative Disorders, Laboratory of Molecular MedicineBambino Gesu' Children's Research Hospital, IRCCSRomeItaly
| | - Penelope E. Bonnen
- Department of Molecular and Human GeneticsBaylor College of MedicineHoustonTexas
| | - Drago Bratkovic
- Metabolic ClinicWomen's and Children's HospitalNorth AdelaideSouth AustraliaAustralia
| | - Rosalba Carrozzo
- Department of Neurosciences, Unit of Muscular and Neurodegenerative Disorders, Laboratory of Molecular MedicineBambino Gesu' Children's Research Hospital, IRCCSRomeItaly
| | | | - Michela Di Nottia
- Department of Neurosciences, Unit of Muscular and Neurodegenerative Disorders, Laboratory of Molecular MedicineBambino Gesu' Children's Research Hospital, IRCCSRomeItaly
| | - Daniele Ghezzi
- Unit of Medical Genetics and NeurogeneticsFondazione IRCCS Istituto Neurologico Carlo BestaMilanItaly
- Department of Pathophysiology and TransplantationUniversity of MilanMilanItaly
| | - Amy Goldstein
- Mitochondrial Medicine Frontier ProgramChildren's Hospital of PhiladelphiaPhiladelphiaUSA
| | - Eric Haan
- Metabolic ClinicWomen's and Children's HospitalNorth AdelaideSouth AustraliaAustralia
| | - Rita Horvath
- Wellcome Centre for Mitochondrial Research, Institute of Genetic MedicineNewcastle UniversityNewcastle upon TyneUK
| | - Joanne Hughes
- National Centre for Inherited Metabolic DisordersTemple Street Children's University HospitalDublinIreland
| | - Federica Invernizzi
- Unit of Medical Genetics and NeurogeneticsFondazione IRCCS Istituto Neurologico Carlo BestaMilanItaly
| | - Eleonora Lamantea
- Unit of Medical Genetics and NeurogeneticsFondazione IRCCS Istituto Neurologico Carlo BestaMilanItaly
| | - Benjamin Lucas
- York CollegeThe City University of New YorkJamaicaNew York
| | | | | | - Shamima Rahman
- Mitochondrial Research GroupUCL Great Ormond Street Institute of Child HealthLondonUK
| | - Pedro Rebelo‐Guiomar
- MRC Mitochondrial Biology UnitUniversity of CambridgeCambridgeUK
- Graduate Program in Areas of Basic and Applied BiologyUniversity of PortoPortoPortugal
| | - Saikat Santra
- Department of Clinical Inherited Metabolic DisordersBirmingham Children's HospitalBirminghamUK
| | - Daniela Verrigni
- Department of Neurosciences, Unit of Muscular and Neurodegenerative Disorders, Laboratory of Molecular MedicineBambino Gesu' Children's Research Hospital, IRCCSRomeItaly
| | - Robert McFarland
- Genetics of Mitochondrial Disorders, Institute of Human GeneticsHelmholtz Zentrum MünchenNeuherbergGermany
| | - Holger Prokisch
- Genetics of Mitochondrial Disorders, Institute of Human GeneticsTechnische Universität MünchenMunichGermany
- Genetics of Mitochondrial Disorders, Institute of Human GeneticsHelmholtz Zentrum MünchenNeuherbergGermany
| | - Robert W. Taylor
- Wellcome Centre for Mitochondrial Research, Institute of NeuroscienceNewcastle UniversityNewcastle upon TyneUK
| | - Louis Levinger
- York CollegeThe City University of New YorkJamaicaNew York
| | - Michal Minczuk
- MRC Mitochondrial Biology UnitUniversity of CambridgeCambridgeUK
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Otto R, Schirrmeister W, Majeed RW, Greiner F, Lucas B, Röhrig R, Walcher F, Brammen D. Implementation of Emergency Department Performance Benchmarking Using R and LaTeX. Stud Health Technol Inform 2019; 267:238-246. [PMID: 31483278 DOI: 10.3233/shti190833] [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] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The German Emergency Department Data Registry (GEDD-registry, AKTIN) provides an infrastructure for collecting and querying up-to-date medical records in a distributed manner. Within this framework, a benchmark report on cross-institutional comparison using the program R is prepared using routine data of participating hospitals. Currently, 16 emergency departments (EDs) routinely transfer data of 1,200 to approximately 5,000 patients per month to a federated GEDD-registry datawarehouse. Using various packages in the R environment, hospitals receive a monthly visual report on their data among all participating hospitals. Graphical representations are implemented using column diagrams and box plots. Reports currently contain 25 tables and 40 graphs. Benchmark reports are created in R-Studio and exported using Portable Document Format, PDF. Quarterly expert meetings with the heads of participating EDs are currently performed for further improvements. Preparation of external benchmarking reports with R enables a detailed data presentation for participating hospitals and ED managers.
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Affiliation(s)
| | | | - Raphael W Majeed
- Division of Medical Informatics, University of Oldenburg, Germany.,Institute of Medical Informatics, University Hospital RWTH Aachen, Germany
| | | | | | - Rainer Röhrig
- Division of Medical Informatics, University of Oldenburg, Germany.,Institute of Medical Informatics, University Hospital RWTH Aachen, Germany
| | | | - Dominik Brammen
- Department of Trauma Surgery.,Department of Anesthesiology, Otto von Guericke University, Magdeburg, Germany
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Lucas B, Schladitz P, Schirrmeister W, Pliske G, Walcher F, Kulla M, Brammen D. The way from pen and paper to electronic documentation in a German emergency department. BMC Health Serv Res 2019; 19:558. [PMID: 31399096 PMCID: PMC6688333 DOI: 10.1186/s12913-019-4400-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Accepted: 08/05/2019] [Indexed: 11/12/2022] Open
Abstract
Background Some of the advantages of implementing electronic emergency department information systems (EDIS) are improvements in data availability and simplification of statistical evaluations of emergency department (ED) treatments. However, for multi-center evaluations, standardized documentation is necessary. The AKTIN project (“National Emergency Department Register: Improvement of Health Services Research in Acute Medicine in Germany”) has used the “German Emergency Department Medical Record” (GEDMR) published by the German Interdisciplinary Association of Intensive and Emergency Care as the documentation standard for its national data registry. Methods Until March 2016 the documentation standard in ED was the pen-and-paper version of the GEDMR. In April 2016 we implemented the GEDMR in a timeline-based EDIS. Related to this, we compared the availability of structured treatment information of traumatological patients between pen-and-paper-based and electronic documentation, with special focus on the treatment time. Results All 796 data fields of the 6 modules (basic data, severe trauma, patient surveillance, anesthesia, council, neurology) were adapted for use with the existing EDIS configuration by a physician working regularly in the ED. Electronic implementation increased availability of structured anamnesis and treatment information. However, treatment time was increased in electronic documentation both immediately (2:12 ± 0:04 h; n = 2907) and 6 months after implementation (2:18 ± 0:03 h; n = 4778) compared to the pen-and-paper group (1:43 ± 0:02 h; n = 2523; p < 0.001). Conclusions We successfully implemented standardized documentation in an EDIS. The availability of structured treatment information was improved, but treatment time was also increased. Thus, further work is necessary to improve input time.
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Affiliation(s)
- Benjamin Lucas
- Department of Trauma Surgery, Otto-von-Guericke University Magdeburg, D 39120, Magdeburg, Germany.
| | - Peter Schladitz
- Department of Trauma Surgery, Otto-von-Guericke University Magdeburg, D 39120, Magdeburg, Germany
| | - Wiebke Schirrmeister
- Department of Trauma Surgery, Otto-von-Guericke University Magdeburg, D 39120, Magdeburg, Germany
| | - Gerald Pliske
- Department of Trauma Surgery, Otto-von-Guericke University Magdeburg, D 39120, Magdeburg, Germany
| | - Felix Walcher
- Department of Trauma Surgery, Otto-von-Guericke University Magdeburg, D 39120, Magdeburg, Germany
| | - Martin Kulla
- Department of Anaesthesiology, Intensive Care Medicine, Emergency Medicine and Pain Therapy, Bundeswehrhospital Ulm, Oberer Eselsberg 40, 89081, Ulm, Germany
| | - Dominik Brammen
- Department of Anaesthesiology and Intensive Care, Otto-von-Guericke University Magdeburg, D-39120, Magdeburg, Germany
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Lucas B, Wiegand S, Jahn O, Greiner F, Walcher F, Piatek S. [Patient Motivation to Participate in Medical Education]. Zentralbl Chir 2019; 145:481-486. [PMID: 30808049 DOI: 10.1055/a-0820-5959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND Student education focuses increasingly on case-related teaching. Often the consent of the patient to participate in student education is supposed to be provided. In most instances this is taken for granted - which it is not. Here, we investigated the motivation of the patients to participate in student education and influence factors using an anonymised survey. MATERIAL AND METHODS The survey was performed from 2017/01/01 until 2017/04/30 and recruited inpatients of a university department of trauma surgery. The questionnaire contained 10 multiple choice questions targeting socio-demographic factors and the motivation of the patients to participate in different aspects of medical education. This was captured using a 5-point Likert scale. The electronic analysis of the questionnaire was performed with the program KLAUS (Blubbsoft GmbH, Berlin, Germany) after digitalizing the data. RESULTS In total 162 questionnaires were analysed. The patients were generally highly motivated to participate in bedside teaching and a student examination as well as consenting to the collection of pictures, videos and X-ray images or subsequent contact. Patient satisfaction was a principle factor. There was a positive correlation between the satisfaction with the motivation to participate in bedside teaching and a student examination as well as giving consent to the collection of pictures, videos and X-ray images or subsequent contact. There was significantly decreased motivation for participation in a lecture. In comparison, male patients had greater motivation to participate in a lecture. Moreover 40- to 49-year-old patients were significantly less motivated to participate in a lecture than 20- to 29-year-old and 50- to 59-year-old patients. Patient satisfaction had no influence on motivation to participate in a lecture. CONCLUSION The motivation of the patients to participate in bedside teaching and a student examination as well as giving consent to the collection of pictures, videos and X-ray images or subsequent contact correlated with patient satisfaction. Socio-demographic factors are less important. Patient motivation to participate in a lecture is lower regardless of patient satisfaction.
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Affiliation(s)
- Benjamin Lucas
- Klinik für Unfallchirurgie, Otto-von-Guericke-Universität Magdeburg Medizinische Fakultät, Magdeburg
| | - Stefan Wiegand
- Klinik für Unfallchirurgie, Otto-von-Guericke-Universität Magdeburg Medizinische Fakultät, Magdeburg
| | - Oliver Jahn
- Klinik für Unfallchirurgie, Otto-von-Guericke-Universität Magdeburg Medizinische Fakultät, Magdeburg
| | - Felix Greiner
- Klinik für Unfallchirurgie, Otto-von-Guericke-Universität Magdeburg Medizinische Fakultät, Magdeburg
| | - Felix Walcher
- Klinik für Unfallchirurgie, Otto-von-Guericke-Universität Magdeburg Medizinische Fakultät, Magdeburg
| | - Stefan Piatek
- Klinik für Unfallchirurgie, Otto-von-Guericke-Universität Magdeburg Medizinische Fakultät, Magdeburg
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Keilhoff G, Mbou RP, Lucas B, Schild L. The Differentiation of Spinal Cord Motor Neurons is Associated with Changes of the Mitochondrial Phospholipid Cardiolipin. Neuroscience 2019; 400:169-183. [DOI: 10.1016/j.neuroscience.2019.01.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 01/04/2019] [Accepted: 01/07/2019] [Indexed: 01/09/2023]
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Lucas B, Brammen D, Schirrmeister W, Aleyt J, Kulla M, Röhrig R, Walcher F. [Requirements for a sustainable standardization and digitalization in clinical emergency and acute medicine]. Unfallchirurg 2019; 122:243-246. [PMID: 30666344 DOI: 10.1007/s00113-019-0603-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Digitalization and standardization of documentation in medicine are increasingly progressing. In the decision of the Federal Joint Committee (G-BA) for a staged system of emergency structures in hospitals and in the report of the expert committee for development in the healthcare system on needs-oriented guidance of healthcare, the actuality of the topic is underlined with concrete naming of future tasks. The section on emergency admission protocols of the German Interdisciplinary Association of Intensive and Emergency Care Medicine (DIVI) has been working for years on this topic and has repeatedly reported on the progress of the topic in clinical emergency care. Standardization and digitalization represent the foundation for health services research spread across locations as well as the possibility for benchmarking. Digitalization makes the secondary use of primary clinical routine data possible. Digitalization decreases redundancies of data transmission by avoiding manual data input in, for example registers.
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Affiliation(s)
- Benjamin Lucas
- Klinik für Unfallchirurgie, Universitätsklinikum Magdeburg, Leipziger Straße 44, 39120, Magdeburg, Deutschland.
| | - Dominik Brammen
- Klinik für Anästhesiologie und Intensivmedizin, Universitätsklinikum Magdeburg, Leipziger Straße 44, 39120, Magdeburg, Deutschland
| | - Wiebke Schirrmeister
- Klinik für Unfallchirurgie, Universitätsklinikum Magdeburg, Leipziger Straße 44, 39120, Magdeburg, Deutschland
| | - Jacob Aleyt
- TMF - Technologie- und Methodenplattform für die vernetzte medizinische Forschung e. V., Charlottenstraße 42/Ecke Dorotheenstraße, 10117, Berlin, Deutschland
| | - Martin Kulla
- Klinik für Anästhesie, Intensivmedizin, Notfallmedizin und Schmerztherapie, Bundeswehrankenhaus Ulm, Oberer Eselsberg 40, 89081, Ulm, Deutschland
| | - Rainer Röhrig
- Abteilung Medizinische Informatik, Department für Versorgungsforschung, Carl von Ossietzky Universität Oldenburg, 26111, Oldenburg, Deutschland
| | - Felix Walcher
- Klinik für Unfallchirurgie, Universitätsklinikum Magdeburg, Leipziger Straße 44, 39120, Magdeburg, Deutschland
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Sanson F, Pandey AK, Harms F, Dovillaire G, Baynard E, Demailly J, Guilbaud O, Lucas B, Neveu O, Pittman M, Ros D, Richardson M, Johnson E, Li W, Balcou P, Kazamias S. Hartmann wavefront sensor characterization of a high charge vortex beam in the extreme ultraviolet spectral range. Opt Lett 2018; 43:2780-2783. [PMID: 29905687 DOI: 10.1364/ol.43.002780] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 05/02/2018] [Indexed: 06/08/2023]
Abstract
We demonstrate for the first time, to the best of our knowledge, the ability of extreme ultraviolet (XUV) Hartmann wavefront sensors to characterize high charge vortex beams produced by high-order harmonic generation up to the order of 25. We also show that phase matched absorption limited high harmonic generation is able to maintain the high charge vortex structure of the XUV beam even in a rather long (1 cm) generation medium.
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Brock C, Yi Y, Papaluca T, Lucas B, Angus PW, Taylor D, Leung C. Exploring the feasibility of targeted chronic hepatitis B screening in the emergency department: A pilot study. Emerg Med Australas 2018; 30:864-866. [PMID: 29885209 DOI: 10.1111/1742-6723.13118] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 01/31/2018] [Revised: 05/16/2018] [Accepted: 05/24/2018] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To explore the feasibility of an ED chronic hepatitis B (CHB) screening programme. METHODS Adult patients born in intermediate-high CHB prevalent regions completed a pre-screening questionnaire and were offered CHB testing. ED staff were surveyed to gauge potential barriers to the programme. RESULTS Eighty patients demonstrated limited knowledge of hepatitis B virus transmission and perceived many barriers to screening. Among 65 tested for CHB, no new cases were detected but 36 (55.4%, 95% CI 42.6-67.5) were susceptible to infection. Staff supported the programme but reported potential barriers. CONCLUSION Targeted ED CHB screening is feasible but effectiveness and cost-effectiveness need further exploration.
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Affiliation(s)
- Catherine Brock
- Department of Medicine, Austin Clinical School, The University of Melbourne, Melbourne, Victoria, Australia
| | - Yuan Yi
- Department of Medicine, Austin Clinical School, The University of Melbourne, Melbourne, Victoria, Australia
| | - Timothy Papaluca
- Department of Gastroenterology and Hepatology, Austin Health, Melbourne, Victoria, Australia
| | - Benjamin Lucas
- Department of Geospatial Sciences and Mathematics, Royal Melbourne Institute of Technology, Melbourne, Victoria, Australia
| | - Peter W Angus
- Department of Medicine, Austin Clinical School, The University of Melbourne, Melbourne, Victoria, Australia.,Department of Gastroenterology and Hepatology, Austin Health, Melbourne, Victoria, Australia
| | - David Taylor
- Department of Medicine, Austin Clinical School, The University of Melbourne, Melbourne, Victoria, Australia.,Department of Emergency Medicine, Austin Health, Melbourne, Victoria, Australia
| | - Christopher Leung
- Department of Medicine, Austin Clinical School, The University of Melbourne, Melbourne, Victoria, Australia.,Department of Gastroenterology and Hepatology, Austin Health, Melbourne, Victoria, Australia
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Abstract
The aim was to find out if professions differed in their contributions to the workload of two multi-professional community mental health teams. Both teams aimed to provide community mental health care in London, targeting those with severe mental illness and using the care programme approach. Junior psychiatrists had fewer contacts than other professionals but medical staff tended to contribute more to assessments. Community mental health nurses tended to have the most contacts. Community mental health team planners should be aware of inter-professional differences when designing teams.
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Brammen D, Eggert P, Lucas B, Heermann-Langford L, McClay JC. Comparing the German Emergency Department Medical Record with the US HL7 Data Elements for Emergency Department Systems. Stud Health Technol Inform 2018; 247:216-220. [PMID: 29677954] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Interoperability between emergency department (ED) information systems requires a shared data specification. In 2013 Health Level Seven International, an international standards body, approved a specification for Data Elements for Emergency Department Systems (DEEDS) for use in the United States. A similar specification was created in Germany for national employment, defining data elements and forms. This study presents the first step in the efforts to harmonize the two data definitions for International approval by comparing the meaning of the German Emergency Department Medical Record (GEDMR) data element definitions with the US DEEDS using a methodology for terminology mapping from ISO/TR 12300. The comparison between GEDMR and DEEDS did show significant differences in certain domains. The results support development of an international standard for ED data elements.
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Affiliation(s)
- Dominik Brammen
- Department of Trauma Surgery, Otto-von-Guericke-University Magdeburg, Germany
| | - Paul Eggert
- Department of Trauma Surgery, Otto-von-Guericke-University Magdeburg, Germany
| | - Benjamin Lucas
- Department of Trauma Surgery, Otto-von-Guericke-University Magdeburg, Germany
| | - Laura Heermann-Langford
- Homer Warner Center for Informatics Research, Intermountain Healthcare, Salt Lake City, UT, USA
| | - James C McClay
- Department of Emergency Medicine, University of Nebraska Medical Center, Omaha, NE, USA
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Pliske G, Heide S, Lucas B, Brandstädter K, Walcher F, Kropf S, Lessig R, Piatek S. [Legal medicine specialists within the framework of acute care : Analysis of legal medicine consultations in relation to the victims' statistics of the state office of criminal investigation in Saxony-Anhalt]. Unfallchirurg 2017; 121:391-396. [PMID: 28921014 DOI: 10.1007/s00113-017-0413-3] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
BACKGROUND In acute medical care, there are patients who have been injured by the influence of others. The aim of this study was to analyze all cases which were presented to the Institute for Legal Medicine of the University Halle (Saale). The cases where analyzed in relation to the victims' statistics of the state office of criminal investigation in Saxony-Anhalt. MATERIALS AND METHODS The consultations of the Institute for Legal Medicine Halle-Wittenberg for 2012-2015 were evaluated with regard to the age and gender distribution, the reasons for the consultation and time until the request for consultations. These cases were statistically compared to the victims' statistics of the state office of criminal investigation in Saxony-Anhalt 2014-2015. RESULTS A total of 536 cases (55.6% male and 44.4% female patients) were evaluated. In all, 62.1% of patients were under 18 years of age; 43.5% of all consultations were requested by pediatric (surgery) clinics. The most common reasons for consultation were sexual child abuse or violence against children (50.7%). Compared to the victims' statistics, significantly more children were examined by legal medicine specialists than could have been expected (p < 0.001). In adult patients, the most common causes for consultation were acts of violence (20.4%) and domestic violence (10.1%). Among adults, significantly more women and fewer men were presented than expected (p = 0.001). CONCLUSION There were only a small number of consultations of legal medicine specialists in relation to the victims' statistics. Most of them were children and women. The temporal latency between the act of violence and the consultations was one day and more. The latency and the renunciation of the consultation of the legal medicine specialists can lead to loss of evidence.
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Affiliation(s)
- G Pliske
- Klinik für Unfallchirurgie, Otto-von-Guericke Universität Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Deutschland.
| | - S Heide
- Institut für Rechtsmedizin, Universitätsklinikum Halle (Saale), Halle (Saale), Deutschland
| | - B Lucas
- Klinik für Unfallchirurgie, Otto-von-Guericke Universität Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Deutschland
| | - K Brandstädter
- Institut für Rechtsmedizin, Universitätsklinikum Halle (Saale), Außenstelle Magdeburg, Magdeburg, Deutschland
| | - F Walcher
- Klinik für Unfallchirurgie, Otto-von-Guericke Universität Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Deutschland
| | - S Kropf
- Institut für Biometrie und Medizinische Informatik, Otto-von-Guericke Universität Magdeburg, Magdeburg, Deutschland
| | - R Lessig
- Institut für Rechtsmedizin, Universitätsklinikum Halle (Saale), Halle (Saale), Deutschland
| | - S Piatek
- Klinik für Unfallchirurgie, Otto-von-Guericke Universität Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Deutschland
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Xiao Y, Lucas B, Molcho E, Vigodner M. Cross-talk between sumoylation and phosphorylation in mouse spermatocytes. Biochem Biophys Res Commun 2017; 487:640-645. [PMID: 28435066 DOI: 10.1016/j.bbrc.2017.04.107] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 04/07/2017] [Accepted: 04/19/2017] [Indexed: 11/16/2022]
Abstract
The meiotic G2/M1 transition is mostly regulated by posttranslational modifications, however, the cross-talk between different posttranslational modifications is not well-understood, especially in spermatocytes. Sumoylation has emerged as a critical regulatory event in several developmental processes, including reproduction. In mouse oocytes, inhibition of sumoylation caused various meiotic defects and led to aneuploidy. However, the role of sumoylation in male reproduction has only begun to be elucidated. Given the important role of several SUMO targets (including kinases) in meiosis, in this study, the role of sumoylation was addressed by monitoring the G2/M1 transition in pachytene spermatocytes in vitro upon inhibition of sumoylation. Furthermore, to better understand the cross-talk between sumoylation and phosphorylation, the activity of several kinases implicated in meiotic progression was also assessed upon down-regulation of sumoylation. The results of the analysis demonstrate that inhibition of sumoylation with ginkgolic acid (GA) arrests the G2/M1 transition in mouse spermatocytes preventing chromosome condensation and disassembling of the synaptonemal complex. Our results revealed that the activity of PLK1 and the Aurora kinases increased during the G2/M1 meiotic transition, but was negatively regulated by the inhibition of sumoylation. In the same experiment, the activity of c-Abl, the ERKs, and AKT were not affected or increased after GA treatment. Both the AURKs and PLK1 appear to be "at the right place, at the right time" to at least, in part, explain the meiotic arrest obtained in the spermatocyte culture.
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Affiliation(s)
- Yuxuan Xiao
- Department of Biology, Stern College, Yeshiva University, New York, NY, USA
| | - Benjamin Lucas
- Department of Biology, Stern College, Yeshiva University, New York, NY, USA
| | - Elana Molcho
- Department of Biology, Stern College, Yeshiva University, New York, NY, USA
| | - Margarita Vigodner
- Department of Biology, Stern College, Yeshiva University, New York, NY, USA; Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY, USA.
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Wyllie J, Lucas B, Carlson J, Kitchens B, Kozary B, Zaki M. An Examination of Not-For-Profit Stakeholder Networks for Relationship Management: A Small-Scale Analysis on Social Media. PLoS One 2016; 11:e0163914. [PMID: 27711236 PMCID: PMC5053609 DOI: 10.1371/journal.pone.0163914] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 09/17/2016] [Indexed: 12/04/2022] Open
Abstract
Using a small-scale descriptive network analysis approach, this study highlights the importance of stakeholder networks for identifying valuable stakeholders and the management of existing stakeholders in the context of mental health not-for-profit services. We extract network data from the social media brand pages of three health service organizations from the U.S., U.K., and Australia, to visually map networks of 579 social media brand pages (represented by nodes), connected by 5,600 edges. This network data is analyzed using a collection of popular graph analysis techniques to assess the differences in the way each of the service organizations manage stakeholder networks. We also compare node meta-information against basic topology measures to emphasize the importance of effectively managing relationships with stakeholders who have large external audiences. Implications and future research directions are also discussed.
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Affiliation(s)
- Jessica Wyllie
- Newcastle Business School, University of Newcastle, Callaghan, Australia
| | - Benjamin Lucas
- Department of Marketing and Supply Chain Management, School of Business and Economics, Maastricht University, Maastricht, Netherlands and BISS Institute, Maastricht, Netherlands
| | - Jamie Carlson
- Newcastle Business School, University of Newcastle, Callaghan, Australia
- * E-mail:
| | - Brent Kitchens
- McIntire School of Commerce, University of Virginia, Charlottesville, Virginia, United States of America
| | | | - Mohamed Zaki
- Cambridge Service Alliance, Insitute for Manufacturing, Department of Engineering, University of Cambridge, Cambridge, United Kingdom
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Xiao Y, Lucas B, Molcho E, Schiff T, Vigodner M. Inhibition of CDK1 activity by sumoylation. Biochem Biophys Res Commun 2016; 478:919-23. [PMID: 27520372 DOI: 10.1016/j.bbrc.2016.08.051] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 08/08/2016] [Indexed: 11/29/2022]
Abstract
Sumoylation (a covalent modification by Small Ubiquitin-like Modifiers or SUMO proteins) has been implicated in the regulation of various cellular events including cell cycle progression. We have recently identified CDK1, a master regulator of mitosis and meiosis, as a SUMO target both in vivo and in vitro, supporting growing evidence concerning a close cross talk between sumoylation and phosphorylation during cell cycle progression. However, any data regarding the effect of sumoylation upon CDK1 activity have been missing. In this study, we performed a series of in vitro experiments to inhibit sumoylation by three different means (ginkgolic acid, physiological levels of oxidative stress, and using an siRNA approach) and assessed the changes in CDK1 activity using specific antibodies and a kinase assay. We have also tested for an interaction between SUMO and active and/or inactive CDK1 isoforms in addition to having assessed the status of CDK1-interacting sumoylated proteins upon inhibition of sumoylation. Our data suggest that inhibition of sumoylation increases the activity of CDK1 probably through changes in sumoylated status and/or the ability of specific proteins to bind CDK1 and inhibit its activity.
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Affiliation(s)
- Yuxuan Xiao
- Department of Biology, Stern College, Yeshiva University, New York, NY, USA
| | - Benjamin Lucas
- Department of Biology, Stern College, Yeshiva University, New York, NY, USA
| | - Elana Molcho
- Department of Biology, Stern College, Yeshiva University, New York, NY, USA
| | - Tania Schiff
- Department of Biology, Stern College, Yeshiva University, New York, NY, USA
| | - Margarita Vigodner
- Department of Biology, Stern College, Yeshiva University, New York, NY, USA; Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY, USA.
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35
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Lucas B. Sécuriser le déménagement d’un service de radiothérapie : expérience toulousaine. Cancer Radiother 2015. [DOI: 10.1016/j.canrad.2015.07.141] [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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Park SH, Chen WC, Esmaeil N, Lucas B, Marsh LM, Reibman J, Grunig G. Interleukin 13- and interleukin 17A-induced pulmonary hypertension phenotype due to inhalation of antigen and fine particles from air pollution. Pulm Circ 2015; 4:654-68. [PMID: 25610601 DOI: 10.1086/678511] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Accepted: 04/10/2014] [Indexed: 12/12/2022] Open
Abstract
Pulmonary hypertension has a marked detrimental effect on quality of life and life expectancy. In a mouse model of antigen-induced pulmonary arterial remodeling, we have recently shown that coexposure to urban ambient particulate matter (PM) significantly increased the thickening of the pulmonary arteries and also resulted in significantly increased right ventricular systolic pressures. Here we interrogate the mechanism and show that combined neutralization of interleukin 13 (IL-13) and IL-17A significantly ameliorated the increase in right ventricular systolic pressure, the circumferential muscularization of pulmonary arteries, and the molecular change in the right ventricle. Surprisingly, our data revealed a protective role of IL-17A for the antigen- and PM-induced severe thickening of pulmonary arteries. This protection was due to the inhibition of the effects of IL-13, which drove this response, and the expression of metalloelastase and resistin-like molecule α. However, the latter was redundant for the arterial thickening response. Anti-IL-13 exacerbated airway neutrophilia, which was due to a resulting excess effect of IL-17A, confirming concurrent cross inhibition of IL-13- and IL-17A-dependent responses in the lungs of animals exposed to antigen and PM. Our experiments also identified IL-13/IL-17A-independent molecular reprogramming in the lungs induced by exposure to antigen and PM, which indicates a risk for arterial remodeling and protection from arterial constriction. Our study points to IL-13- and IL-17A-coinduced inflammation as a new template for biomarkers and therapeutic targeting for the management of immune response-induced pulmonary hypertension.
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Affiliation(s)
- Sung-Hyun Park
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo, New York, USA
| | - Wen-Chi Chen
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo, New York, USA
| | - Nafiseh Esmaeil
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo, New York, USA ; Current affiliation: Department of Immunology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Benjamin Lucas
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo, New York, USA
| | - Leigh M Marsh
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
| | - Joan Reibman
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo, New York, USA ; Pulmonary Medicine, Department of Medicine, New York University School of Medicine, New York, New York, USA
| | - Gabriele Grunig
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo, New York, USA ; Pulmonary Medicine, Department of Medicine, New York University School of Medicine, New York, New York, USA
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Gonçalves A, Mailliez A, Dalenc F, You B, L'haridon T, Leheurteur M, Tredan O, Ferrero J, Del Piano F, Alliot C, Lucas B, Dohollou N, Cottu P, Dauba J, De Cremoux P, Pierga J, Orsini C, Pulido M, Macgrogan G, Bonnefoi H. A Phase Ii Trial of Abiraterone Acetate Plus Prednisone in Patients with Molecular Apocrine (Her2-Negative) Locally Advanced or Metastatic Breast Cancer: a Ucbg Study. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu329.60] [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: 11/12/2022] Open
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Keilhoff G, Lucas B, Pinkernelle J, Steiner M, Fansa H. Effects of cerebrolysin on motor-neuron-like NSC-34 cells. Exp Cell Res 2014; 327:234-55. [PMID: 24997385 DOI: 10.1016/j.yexcr.2014.06.020] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [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: 02/27/2014] [Revised: 06/12/2014] [Accepted: 06/26/2014] [Indexed: 01/01/2023]
Abstract
Although the peripheral nervous system is capable of regeneration, this capability is limited. As a potential means of augmenting nerve regeneration, the effects of cerebrolysin (CL)--a proteolytic peptide fraction--were tested in vitro on the motor-neuron-like NSC-34 cell line and organotypic spinal cord cultures. Therefore, NSC-34 cells were subjected to mechanical stress by changing media and metabolic stress by oxygen glucose deprivation. Afterwards, cell survival/proliferation using MTT and BrdU-labeling (FACS) and neurite sprouting using ImageJ analysis were evaluated. Calpain-1, Src and α-spectrin protein expression were analyzed by Western blot. In organotypic cultures, the effect of CL on motor neuron survival and neurite sprouting was tested by immunohistochemistry. CL had a temporary anti-proliferative but initially neuroprotective effect on OGD-stressed NSC-34 cells. High-dosed or repeatedly applied CL was deleterious for cell survival. CL amplified neurite reconstruction to limited extent, affected calpain-1 protein expression and influenced calpain-mediated spectrin cleavage as a function of Src expression. In organotypic spinal cord slice cultures, CL was not able to support motor neuron survival/neurite sprouting. Moreover, it hampered astroglia and microglia activities. The data suggest that CL may have only isolated positive effects on injured spinal motor neurons. High-dosed or accumulated CL seemed to have adverse effects in treatment of spinal cord injury. Further experiments are required to optimize the conditions for a safe clinical administration of CL in spinal cord injuries.
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Affiliation(s)
- Gerburg Keilhoff
- Institute of Biochemistry and Cell Biology, Otto-von-Guericke University Magdeburg, Leipziger Str. 44, D-39120 Magdeburg, Germany.
| | - Benjamin Lucas
- Institute of Biochemistry and Cell Biology, Otto-von-Guericke University Magdeburg, Leipziger Str. 44, D-39120 Magdeburg, Germany
| | - Josephine Pinkernelle
- Institute of Biochemistry and Cell Biology, Otto-von-Guericke University Magdeburg, Leipziger Str. 44, D-39120 Magdeburg, Germany
| | - Michael Steiner
- Institute of Biochemistry and Cell Biology, Otto-von-Guericke University Magdeburg, Leipziger Str. 44, D-39120 Magdeburg, Germany
| | - Hisham Fansa
- Department of Plastic, Reconstructive and Aesthetic Surgery, Hand Surgery, Klinikum Bielefeld, Teutoburger Str. 50, D-33604 Bielefeld, Germany
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Lucas B, Chen WC, Bleck B, Reibman J, Rom W, Narayanan N, Qu Q, Park SH, Grunig G. Regulation of microRNA expression in the lungs by exposure to air pollution & antigen (HUM2P.340). The Journal of Immunology 2014. [DOI: 10.4049/jimmunol.192.supp.53.13] [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] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
Pulmonary Hypertension is characterized by pulmonary arterial remodeling and increased pressure in the pulmonary circulation. It is often associated with inflammation in the lungs and can lead to right heart failure. Our work shows that urban ambient pollution exacerbates the experimental pulmonary hypertension phenotype just like other types of inflammatory lung conditions. We aimed to identify microRNAs (miRNAs) that are differentially expressed in our mouse model. In addition, we examined plasma samples from individuals occupationally exposed to high levels of air pollution or cigarette smoke, and from controls. Our study is the first to show significantly de-regulated expression of three microRNA species (miR-135a, miR-21, miR-204) in the lungs of mice that were exposed to antigen and particulate matter and developed pulmonary hypertension. De-regulated levels of miR-21 and miR-204 have been reported in human pulmonary hypertension and in experimental pulmonary hypertension. MiR-135a is targeting STAT6 and upregulated expression has been reported in experimental asthma. Using human samples, our study showed that plasma levels of miR-21 and miR-135a, but not levels of miR-204, clustered individuals with high dose exposures and individuals with low dose environmental exposures. Current studies are aimed at identifying the cytokines that control these miRNAs’ expression. The long range goal is to identify miRNAs that indicate an at-risk state of the pulmonary vasculature.
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Affiliation(s)
- Benjamin Lucas
- 1Environmental Medicine, New York University Medical Center, New York, NY
| | - Wen-Chi Chen
- 1Environmental Medicine, New York University Medical Center, New York, NY
| | - Bertram Bleck
- 2Medicine (Pulmonary), New York University Medical Center, New York, NY
| | - Joan Reibman
- 2Medicine (Pulmonary), New York University Medical Center, New York, NY
- 1Environmental Medicine, New York University Medical Center, New York, NY
| | - William Rom
- 2Medicine (Pulmonary), New York University Medical Center, New York, NY
- 1Environmental Medicine, New York University Medical Center, New York, NY
| | | | - Qingshan Qu
- 1Environmental Medicine, New York University Medical Center, New York, NY
| | - Sung-Hyun Park
- 1Environmental Medicine, New York University Medical Center, New York, NY
| | - Gabriele Grunig
- 1Environmental Medicine, New York University Medical Center, New York, NY
- 2Medicine (Pulmonary), New York University Medical Center, New York, NY
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Troisgros O, Gremeaux V, Lucas B, Jacquin A, Khoumri C, Barnay JL, Aboua-Eboulé C, Bénaim C, Casillas JM, Giroud M, Bejot Y. Orientation des structures de soins après l’AVC et facteurs associés dans une étude de population : le registre dijonnais des AVC. Ann Phys Rehabil Med 2014. [DOI: 10.1016/j.rehab.2014.03.110] [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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Remaut K, Symens N, Lucas B, Demeester J, De Smedt SC. Cell division responsive peptides for optimized plasmid DNA delivery: the mitotic window of opportunity? J Control Release 2014; 179:1-9. [PMID: 24462902 DOI: 10.1016/j.jconrel.2014.01.013] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Revised: 01/07/2014] [Accepted: 01/13/2014] [Indexed: 10/25/2022]
Abstract
The delivery of plasmid DNA remains hard to achieve, especially due to the presence of the nuclear membrane barrier. During cell division, however, the nuclear membrane is temporarily disassembled. We evaluated two different strategies to optimize plasmid DNA delivery in dividing cells: 1) phosphorylation responsive peptides that release plasmid DNA preferentially during mitosis and 2) chromatin targeting peptides to anchor plasmid DNA in newly formed nuclei upon cell division. Peptide/DNA particles alone were not efficient in penetrating cells. Upon co-delivery with lipid-based carriers, however, transfection efficiency drastically improved when compared to controls. For the phosphorylation responsive peptides, the presence of the phosphorylation sequence slightly increased transfection efficiency. For the chromatin targeting peptides, however, the chromatin targeting sequence did not seem to be the main reason for the improvement of transfection efficiency when applied in living cells. In conclusion, the pre-condensation of plasmid DNA with peptides improves lipid based delivery, but the nature of the peptides (cell responsive or not) does not seem to be the main reason for the improvement. It seems that the nuclear entry of foreign plasmid DNA is still under tight control, even during the mitotic window of opportunity.
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Affiliation(s)
- K Remaut
- Laboratory of General Biochemistry and Physical Pharmacy, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium
| | - N Symens
- Laboratory of General Biochemistry and Physical Pharmacy, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium
| | - B Lucas
- Laboratory of General Biochemistry and Physical Pharmacy, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium
| | - J Demeester
- Laboratory of General Biochemistry and Physical Pharmacy, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium
| | - S C De Smedt
- Laboratory of General Biochemistry and Physical Pharmacy, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium.
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Beloglazova NV, Shmelin PS, Speranskaya ES, Lucas B, Helmbrecht C, Knopp D, Niessner R, De Saeger S, Goryacheva IY. Quantum Dot Loaded Liposomes As Fluorescent Labels for Immunoassay. Anal Chem 2013; 85:7197-204. [DOI: 10.1021/ac401729y] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- N. V. Beloglazova
- Ghent University, Faculty of Pharmaceutical Sciences, Laboratory of Food Analysis,
9000 Ghent, Belgium
| | - P. S. Shmelin
- OJSC CSRIT Technomash, “Neuronet”, 121108 Moscow, Russia
| | - E. S. Speranskaya
- Saratov State University, Chemistry Institute, Department of General and Inorganic Chemistry,
410012 Saratov, Russia
| | - B. Lucas
- Ghent University, Faculty of Pharmaceutical
Sciences, Laboratory of General Biochemistry
and Physical Pharmacy, 9000 Ghent, Belgium
| | - C. Helmbrecht
- Technische Universität München, Institute of Hydrochemistry and Chemical Balneology & Chair of Analytical Chemistry, D-81377 München, Germany
| | - D. Knopp
- Technische Universität München, Institute of Hydrochemistry and Chemical Balneology & Chair of Analytical Chemistry, D-81377 München, Germany
| | - R. Niessner
- Technische Universität München, Institute of Hydrochemistry and Chemical Balneology & Chair of Analytical Chemistry, D-81377 München, Germany
| | - S. De Saeger
- Ghent University, Faculty of Pharmaceutical Sciences, Laboratory of Food Analysis,
9000 Ghent, Belgium
| | - I. Yu. Goryacheva
- Saratov State University, Chemistry Institute, Department of General and Inorganic Chemistry,
410012 Saratov, Russia
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Donzé C, Barbot P, Scheiber-Nogueira M, Perrin S, Lucas B, Hautecoeur P. Irrigations transanales et troubles anorectaux dans la sclérose en plaques : évaluation de l’observance et de l’efficacité. Rev Neurol (Paris) 2013. [DOI: 10.1016/j.neurol.2013.01.421] [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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Bourgeois H, Soulié P, Lucas B, Mercier BA, Zannetti A, Delecroix V, L'haridon T, Blot E, Delaloge S, Grudé F. Abstract OT3-3-04: ALOPREV: first cooling scalp trial for prevention of persisting alopecia after docetaxel for early breast cancer patients. Cancer Res 2012. [DOI: 10.1158/0008-5472.sabcs12-ot3-3-04] [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
During SABCS 2009, Western France Observatory of Cancer has presented “ALOPERS” results from more than one hundred patients with persisting alopecia or suboptimal hair regrowth after chemotherapy for early breast cancer. Docetaxel 75–100 mg/msq was concerned for majority of patients. 43% of patients experienced alopecia more than 24 months after their last chemotherapy infusion. Optimal information of patients about alopecia and persisting alopecia appears to be mandatory before treatment: 47% of patients undergo a psychological shock during hair loss. Morevover, BCIRG 001 study (TAC versus FAC) led to the conclusion that docetaxel 75 mg/msq is responsible for persisting alopecia for 3% of patients. So, by extrapolating, in France, each year, docetaxel could induce a persisting alopecia in 300 patients. To confirm this figure, “ERALOP” study is in progress to evaluate precisely the incidence of persisting alopecia after docetaxel in early breast cancer patients and then theses data will be communicated to ANSM. It must be noticed that 8% of patients refused to be treated because of the risk of persistant alopecia (Trueb et al, 2010). That's why it is a worldwide public health problem, with personal and societal implications.
As alopecia is universal after FEC100 regimen, the cooling scalp has been supposed to be very effective during docetaxel 1 hour infusion and to allow a better hair regrowth but with a high risk in term of tolerance. Since 2012, a prospective clinical trial “ALOPREV” has begun in Western France to evaluate tolerance of cooling scalp, after 3–4 courses of FEC100 regimen and during 3–4 courses of docetaxel 100 mg/msq, for patients treated for early breast cancer. So, ALOPREV is designed as a safety trial. First, cooling scalp major toxicities (headache, neck pain, discomfort associated with cold, sinusitis) are evaluated during each docetaxel course by the patient. Then, auto-questionnary about hair loss and regrowth, nails disorders and others toxicities due to docetaxel and questionnary about quality of life (EORTC QLQ-C30 and BR-23 scales) is completed by the patients before, during and after treatment. Patients will be followed-up 12 months and final toxicities will be reported by physicians. According to our daily practice, it will demonstrate that 60% of patients could tolerate two consecutive cooling scalps during docetaxel infusion, and with statistical considerations (alpha-beta risks and 10% of ineligibility). So 160 patients must be included during inclusion period (18 months). 10 public or private care centers have been opened (45 investigators). This trial implicates particularly nurses teams and all patients will sign an informed consent before FEC100 courses. ALOPREV started two months ago and 25 patients are already enrolled.
In conclusion, cooling scalp is known to be safe, manageable and partially effective before hair loss. ALOPREV will evaluate safety and efficacy to avoid persisting alopecia after hair loss.
Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr OT3-3-04.
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Affiliation(s)
- H Bourgeois
- Clinique Victor Hugo, Le Mans, France; Observatoire dédié au Cancer Bretagne Pays de Loire, Angers, France; Institut de Cancérologie de l'Ouest, Angers Nantes, France; CHRU Morvan, Brest, France; CHP, Saint Grégoire, France; CHD, Cholet, France; Pôle Hospitalier Mutualiste, Saint Nazaire, France; CHD, La Roche sur Yon, France; Centre Hospitalier Bretagne Atlantique, Vannes, France; Clinique Océane, Centre Saint Yves, Vannes, France; Institut Gustave Roussy, Villejuif, France
| | - P Soulié
- Clinique Victor Hugo, Le Mans, France; Observatoire dédié au Cancer Bretagne Pays de Loire, Angers, France; Institut de Cancérologie de l'Ouest, Angers Nantes, France; CHRU Morvan, Brest, France; CHP, Saint Grégoire, France; CHD, Cholet, France; Pôle Hospitalier Mutualiste, Saint Nazaire, France; CHD, La Roche sur Yon, France; Centre Hospitalier Bretagne Atlantique, Vannes, France; Clinique Océane, Centre Saint Yves, Vannes, France; Institut Gustave Roussy, Villejuif, France
| | - B Lucas
- Clinique Victor Hugo, Le Mans, France; Observatoire dédié au Cancer Bretagne Pays de Loire, Angers, France; Institut de Cancérologie de l'Ouest, Angers Nantes, France; CHRU Morvan, Brest, France; CHP, Saint Grégoire, France; CHD, Cholet, France; Pôle Hospitalier Mutualiste, Saint Nazaire, France; CHD, La Roche sur Yon, France; Centre Hospitalier Bretagne Atlantique, Vannes, France; Clinique Océane, Centre Saint Yves, Vannes, France; Institut Gustave Roussy, Villejuif, France
| | - Blas A Mercier
- Clinique Victor Hugo, Le Mans, France; Observatoire dédié au Cancer Bretagne Pays de Loire, Angers, France; Institut de Cancérologie de l'Ouest, Angers Nantes, France; CHRU Morvan, Brest, France; CHP, Saint Grégoire, France; CHD, Cholet, France; Pôle Hospitalier Mutualiste, Saint Nazaire, France; CHD, La Roche sur Yon, France; Centre Hospitalier Bretagne Atlantique, Vannes, France; Clinique Océane, Centre Saint Yves, Vannes, France; Institut Gustave Roussy, Villejuif, France
| | - A Zannetti
- Clinique Victor Hugo, Le Mans, France; Observatoire dédié au Cancer Bretagne Pays de Loire, Angers, France; Institut de Cancérologie de l'Ouest, Angers Nantes, France; CHRU Morvan, Brest, France; CHP, Saint Grégoire, France; CHD, Cholet, France; Pôle Hospitalier Mutualiste, Saint Nazaire, France; CHD, La Roche sur Yon, France; Centre Hospitalier Bretagne Atlantique, Vannes, France; Clinique Océane, Centre Saint Yves, Vannes, France; Institut Gustave Roussy, Villejuif, France
| | - V Delecroix
- Clinique Victor Hugo, Le Mans, France; Observatoire dédié au Cancer Bretagne Pays de Loire, Angers, France; Institut de Cancérologie de l'Ouest, Angers Nantes, France; CHRU Morvan, Brest, France; CHP, Saint Grégoire, France; CHD, Cholet, France; Pôle Hospitalier Mutualiste, Saint Nazaire, France; CHD, La Roche sur Yon, France; Centre Hospitalier Bretagne Atlantique, Vannes, France; Clinique Océane, Centre Saint Yves, Vannes, France; Institut Gustave Roussy, Villejuif, France
| | - T L'haridon
- Clinique Victor Hugo, Le Mans, France; Observatoire dédié au Cancer Bretagne Pays de Loire, Angers, France; Institut de Cancérologie de l'Ouest, Angers Nantes, France; CHRU Morvan, Brest, France; CHP, Saint Grégoire, France; CHD, Cholet, France; Pôle Hospitalier Mutualiste, Saint Nazaire, France; CHD, La Roche sur Yon, France; Centre Hospitalier Bretagne Atlantique, Vannes, France; Clinique Océane, Centre Saint Yves, Vannes, France; Institut Gustave Roussy, Villejuif, France
| | - E Blot
- Clinique Victor Hugo, Le Mans, France; Observatoire dédié au Cancer Bretagne Pays de Loire, Angers, France; Institut de Cancérologie de l'Ouest, Angers Nantes, France; CHRU Morvan, Brest, France; CHP, Saint Grégoire, France; CHD, Cholet, France; Pôle Hospitalier Mutualiste, Saint Nazaire, France; CHD, La Roche sur Yon, France; Centre Hospitalier Bretagne Atlantique, Vannes, France; Clinique Océane, Centre Saint Yves, Vannes, France; Institut Gustave Roussy, Villejuif, France
| | - S Delaloge
- Clinique Victor Hugo, Le Mans, France; Observatoire dédié au Cancer Bretagne Pays de Loire, Angers, France; Institut de Cancérologie de l'Ouest, Angers Nantes, France; CHRU Morvan, Brest, France; CHP, Saint Grégoire, France; CHD, Cholet, France; Pôle Hospitalier Mutualiste, Saint Nazaire, France; CHD, La Roche sur Yon, France; Centre Hospitalier Bretagne Atlantique, Vannes, France; Clinique Océane, Centre Saint Yves, Vannes, France; Institut Gustave Roussy, Villejuif, France
| | - F Grudé
- Clinique Victor Hugo, Le Mans, France; Observatoire dédié au Cancer Bretagne Pays de Loire, Angers, France; Institut de Cancérologie de l'Ouest, Angers Nantes, France; CHRU Morvan, Brest, France; CHP, Saint Grégoire, France; CHD, Cholet, France; Pôle Hospitalier Mutualiste, Saint Nazaire, France; CHD, La Roche sur Yon, France; Centre Hospitalier Bretagne Atlantique, Vannes, France; Clinique Océane, Centre Saint Yves, Vannes, France; Institut Gustave Roussy, Villejuif, France
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Lucas B, Delpuech B, Garcia J. Manipulateur d’électroradiologie médicale et radiothérapie guidée par l’image : évolution du métier. Cancer Radiother 2012. [DOI: 10.1016/j.canrad.2012.07.008] [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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Limousin N, Lucas B, Salhi H, Roubeau V, Bertrand P, Autret A. La biocéramique fait-elle mieux dormir ? Neurophysiol Clin 2012. [DOI: 10.1016/j.neucli.2012.02.116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Kumar SS, Lucas B, Soorkia S, Barat M, Fayeton JA. Cα–Cβ chromophore bond dissociation in protonated tyrosine-methionine, methionine-tyrosine, tryptophan-methionine, methionine-tryptophan and their sulfoxide analogs. Phys Chem Chem Phys 2012; 14:10225-32. [DOI: 10.1039/c2cp40773f] [Citation(s) in RCA: 8] [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: 11/21/2022]
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Kumar SS, Pérot-Taillandier M, Lucas B, Soorkia S, Barat M, Fayeton JA. UV photodissociation dynamics of deprotonated 2'-deoxyadenosine 5'-monophosphate [5'-dAMP-H]-. J Phys Chem A 2011; 115:10383-90. [PMID: 21776981 DOI: 10.1021/jp204738q] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The UV photodissociation dynamics of deprotonated 2'-deoxyadenosine 5'-monophosphate ([5'-dAMP-H](-)) has been studied using a unique technique based on the coincident detection of the ion and the neutral fragments. The observed fragment ions are m/z 79 (PO(3)(-)), 97 (H(2)PO(4)(-)), 134 ([A-H](-)), 177 ([dAMP-H-A-H(2)O](-)), and 195 ([dAMP-H-A](-)), where "A" refers to a neutral adenine molecule. The relative abundances are comparable to that found in previous studies on [5'-dAMP-H](-) employing different excitation processes, i.e., collisions and UV photons. The fragmentation times of the major channels have been measured, and are all found to be on the microsecond time scale. The fragmentation mechanisms for all channels have been characterized using velocity correlation plots of the ion and neutral fragment(s). The findings show that none of the dissociation channels of [5'-dAMP-H](-) is UV specific and all proceed via statistical fragmentation on the ground state after internal conversion, a result similar to fragmentations induced by collisions.
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Affiliation(s)
- S Sunil Kumar
- Institut des Science Moléculaires d'Orsay, CNRS UMR 8214, Université Paris Sud 11, F-91405 Orsay Cedex, France
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Nagant C, Feng Y, Lucas B, Braeckmans K, Savage P, Dehaye JP. Effect of a low concentration of a cationic steroid antibiotic (CSA-13) on the formation of a biofilm by Pseudomonas aeruginosa. J Appl Microbiol 2011; 111:763-72. [PMID: 21699631 DOI: 10.1111/j.1365-2672.2011.05085.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS Cationic steroids like CSA-13 have been designed by analogy with antimicrobial cationic peptides and have bactericidal properties. The purpose of this work was to evaluate the effect of a low concentration (1 mg l(-1)) of CSA-13 on the formation of a biofilm by eight strains of Pseudomonas aeruginosa (four mucoid and four nonmucoid strains) on an inert surface. METHOD AND RESULTS The biofilm formation was measured with the Crystal Violet method. CSA-13 inhibited the formation of a biofilm by three strains. The zeta potential varied among the strains. The inhibition by the cationic steroid analogue affected the populations of bacteria with the lowest zeta potential. P. aeruginosa bound a fluorescent, more hydrophobic analogue of CSA-13 but there was no correlation between this binding and the inhibition by CSA-13 of biofilm formation. The interaction of CSA-13 with bacteria did not modify their ability to produce rhamnolipids. CONCLUSIONS A low concentration of CSA-13 inhibits the formation of a biofilm by P. aeruginosa through electrostatic interactions and without affecting the production of rhamnolipids. SIGNIFICANCE AND IMPACT OF THE STUDY A low, nontoxic concentration of CSA-13 might be beneficial for the prevention of biofilm formation.
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Affiliation(s)
- C Nagant
- Laboratoire de Chimie biologique et médicale et de Microbiologie pharmaceutique, Faculté de Pharmacie, Université libre de Bruxelles, Brussels, Belgium
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Scotte F, Herve C, Bugat R, Farsi F, Lucas B, Namer M, Tourani J, Tournigand C, Yazbek G, Oudard S, Tahiri K, Krakowski I. Supportive care organization in France: State of the art. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e16575] [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: 11/20/2022] Open
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