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Mengin AC, Nourry N, Severac F, Berna F, Bemmouna D, Costache ME, Fritsch A, Frey I, Ligier F, Engel N, Greth P, Khan A, Chauvet-Gelinier JC, Chabridon G, Haffen E, Nicolier M, Zinetti-Bertschy A, Vidailhet P, Weiner L. Efficacy of the my health too online cognitive behavioral therapy program for healthcare workers during the COVID-19 pandemic: A randomized controlled trial. Internet Interv 2024; 36:100736. [PMID: 38617386 PMCID: PMC11015127 DOI: 10.1016/j.invent.2024.100736] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 02/23/2024] [Accepted: 03/16/2024] [Indexed: 04/16/2024] Open
Abstract
Background Healthcare workers' mental health has been impacted by the COVID-19 pandemic, emphasizing the need for mental health interventions in this population. Online cognitive behavioral therapy (CBT) is efficient to reduce stress and may reach numerous professionals. We developed "MyHealthToo", an online CBT program to help reduce stress among healthcare workers during the COVID-19 pandemic. Objective The aim of our study is to investigate the efficacy of an online CBT program on stress and mental health conditions among healthcare workers during a health crisis. Methods We performed a multicentric randomized controlled trial among 155 participants allocated either to the experimental or active control group (bibliotherapy). The primary outcome was the decrease of perceived stress scores (PSS-10) post-treatment. Secondary outcomes included depression, insomnia and PTSD symptoms along with self-reported resilience and ruminations. Assessments were scheduled pretreatment, mid-treatment (4 weeks), post-treatment (8 weeks), and at 1-month and 4-months follow-up. Results For both interventions, mean changes on the PSS-10 were significant post-therapy (W8), as at 1-month (W12) and 4-months (W24) follow-ups. The between-group comparison showed no difference at any time point (ps > 0.88). Work-related ruminations significantly decreased in the experimental group with a significant between-group difference at W8 (Δ = -1.83 [-3.57; -0.09], p = 0.04). Posttraumatic stress symptoms significantly decreased in the experimental group with a significant between-group difference at W12 (Δ = -1.41 [-2.68; -0.14], p = 0.03). The decrease in work-related ruminations at W8 mediated the decrease in posttraumatic stress symptoms at W12 (p = 0.048). Conclusion The "MyHealthToo" online CBT intervention may help reduce ruminations about work and posttraumatic stress symptoms among healthcare workers during a major health crisis. Work-related ruminations may represent a relevant target of online interventions to improve mental health among healthcare workers.
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Affiliation(s)
- Amaury C. Mengin
- Department of Psychiatry, Mental Health & Addictology, Strasbourg University Hospital, Strasbourg, France
- Regional Great East Center for Psychotraumatism, Strasbourg, France
- Strasbourg University, Faculty of Medicine, Strasbourg, France
- INSERM U1329, Strasbourg Translational NEuroscience and Psychiatry (STEP), Team Psychiatry, Strasbourg, France
- Fédération de Médecine Translationnelle de Strasbourg, France
| | - Nathalie Nourry
- Strasbourg University, Faculty of Medicine, Strasbourg, France
- Fédération de Médecine Translationnelle de Strasbourg, France
- Hôpitaux Universitaires de Strasbourg, Service de Pathologies Professionnelles et Médecine du Travail, Strasbourg, France
| | - François Severac
- Hôpitaux Universitaires de Strasbourg, Département de Santé Publique, GMRC, Strasbourg, France
- Université de Strasbourg, Laboratoire de Biostatistique et Informatique Médicale, iCUBE UMR, 7357 Illkirch, France
| | - Fabrice Berna
- Department of Psychiatry, Mental Health & Addictology, Strasbourg University Hospital, Strasbourg, France
- Strasbourg University, Faculty of Medicine, Strasbourg, France
- INSERM U1329, Strasbourg Translational NEuroscience and Psychiatry (STEP), Team Psychiatry, Strasbourg, France
- Fédération de Médecine Translationnelle de Strasbourg, France
| | - Doha Bemmouna
- Strasbourg University, Faculty of Psychology, Strasbourg, France
| | - Mădălina Elena Costache
- Strasbourg University, Faculty of Psychology, Strasbourg, France
- Laboratoire de Psychologie des Cognitions, Université de Strasbourg, Strasbourg, France
| | - Aurélie Fritsch
- Strasbourg University, Faculty of Psychology, Strasbourg, France
- Laboratoire de Psychologie des Cognitions, Université de Strasbourg, Strasbourg, France
| | - Isabelle Frey
- Department of Psychiatry, Mental Health & Addictology, Strasbourg University Hospital, Strasbourg, France
| | - Fabienne Ligier
- PUPEA, Centre Psychothérapeutique de Nancy, Laxou; EA 4360 APEMAC, Université de Lorraine, Nancy, France
- Centre Psychothérapeutique de Nancy, Laxou, France
| | - Nadia Engel
- PUPEA, Centre Psychothérapeutique de Nancy, Laxou; EA 4360 APEMAC, Université de Lorraine, Nancy, France
- Centre Psychothérapeutique de Nancy, Laxou, France
| | - Philippe Greth
- Pôle de Psychiatrie et Santé Mentale du Groupe Hospitalier Mulhouse Sud Alsace, Mulhouse, France
| | - Anastasia Khan
- Pôle de Psychiatrie et Santé Mentale du Groupe Hospitalier Mulhouse Sud Alsace, Mulhouse, France
| | - Jean-Christophe Chauvet-Gelinier
- Service de Psychiatrie Adultes, Centre Hospitalier Universitaire Dijon-Bourgogne, Unité INSERM LNC-UMR 1231, Université de Bourgogne, Dijon, France
| | - Guillaume Chabridon
- Service de Psychiatrie Adultes, Centre Hospitalier Universitaire Dijon-Bourgogne, Unité INSERM LNC-UMR 1231, Université de Bourgogne, Dijon, France
| | - Emmanuel Haffen
- Service de Psychiatrie, CIC-1431 INSERM, CHU de Besançon, Laboratoire de Neurosciences, Université Bourgogne-Franche-Comté, Besançon, France
| | - Magali Nicolier
- Service de Psychiatrie, CIC-1431 INSERM, CHU de Besançon, Laboratoire de Neurosciences, Université Bourgogne-Franche-Comté, Besançon, France
| | - Anna Zinetti-Bertschy
- Department of Psychiatry, Mental Health & Addictology, Strasbourg University Hospital, Strasbourg, France
- Strasbourg University, Faculty of Psychology, Strasbourg, France
| | - Pierre Vidailhet
- Department of Psychiatry, Mental Health & Addictology, Strasbourg University Hospital, Strasbourg, France
- Regional Great East Center for Psychotraumatism, Strasbourg, France
- Strasbourg University, Faculty of Medicine, Strasbourg, France
- INSERM U1329, Strasbourg Translational NEuroscience and Psychiatry (STEP), Team Psychiatry, Strasbourg, France
- Fédération de Médecine Translationnelle de Strasbourg, France
| | - Luisa Weiner
- Department of Psychiatry, Mental Health & Addictology, Strasbourg University Hospital, Strasbourg, France
- Strasbourg University, Faculty of Psychology, Strasbourg, France
- Laboratoire de Psychologie des Cognitions, Université de Strasbourg, Strasbourg, France
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Franz D, Heerdegen M, Engel N, Lüttig A, Perl S, Plocksties F, Richter A, Köhling R. P 16 Effects of pallidal deep brain stimulation on striatal medium spiny neurons in the animal model of the dystonic dtsz mutant hamster. Clin Neurophysiol 2022. [DOI: 10.1016/j.clinph.2022.01.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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van de Berg SEJ, Pelzer PT, van der Land AJ, Abdrakhmanova E, Ozi AM, Arias M, Cook-Scalise S, Dravniece G, Gebhard A, Juneja S, Handayani R, Kappel D, Kimerling M, Koppelaar I, Malhotra S, Myrzaliev B, Nsa B, Sugiharto J, Engel N, Mulder C, van den Hof S. Acceptability, feasibility, and likelihood of stakeholders implementing the novel BPaL regimen to treat extensively drug-resistant tuberculosis patients. BMC Public Health 2021; 21:1404. [PMID: 34271884 PMCID: PMC8284025 DOI: 10.1186/s12889-021-11427-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 10/26/2020] [Accepted: 06/30/2021] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND BPaL, a 6 month oral regimen composed of bedaquiline, pretomanid, and linezolid for treating extensively drug-resistant tuberculosis (XDR-TB) is a potential alternative for at least 20 months of individualized treatment regimens (ITR). The ITR has low tolerability, treatment adherence, and success rates, and hence to limit patient burden, loss to follow-up and the emergence of resistance it is essential to implement new DR-TB regimens. The objective of this study was to assess the acceptability, feasibility, and likelihood of implementing BPaL in Indonesia, Kyrgyzstan, and Nigeria. METHODS We conducted a concurrent mixed-methods study among a cross-section of health care workers, programmatic and laboratory stakeholders between May 2018 and May 2019. We conducted semi-structured interviews and focus group discussions to assess perceptions on acceptability and feasibility of implementing BPaL. We determined the proportions of a recoded 3-point Likert scale (acceptable; neutral; unacceptable), as well as the overall likelihood of implementing BPaL (likely; neutral; unlikely) that participants graded per regimen, pre-defined aspect and country. We analysed the qualitative results using a deductive framework analysis. RESULTS In total 188 stakeholders participated in this study: 63 from Kyrgyzstan, 51 from Indonesia, and 74 from Nigeria The majority were health care workers (110). Overall, 88% (146/166) of the stakeholders would likely implement BPaL once available. Overall acceptability for BPaL was high, especially patient friendliness was often rated as acceptable (93%, 124/133). In contrast, patient friendliness of the ITR was rated as acceptable by 45%. Stakeholders appreciated that BPaL would reduce workload and financial burden on the health care system. However, several stakeholders expressed concerns regarding BPaL safety (monitoring), long-term efficacy, and national regulatory requirements regarding introduction of the regimen. Stakeholders stressed the importance of addressing current health systems constraints as well, especially in treatment and safety monitoring systems. CONCLUSIONS Acceptability and feasibility of the BPaL regimen is high among TB stakeholders in Indonesia, Kyrgyzstan, and Nigeria. The majority is willing to start using BPaL as the standard of care for eligible patients despite country-specific health system constraints.
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Affiliation(s)
| | - P T Pelzer
- KNCV Tuberculosis foundation, The Hague, The Netherlands.
| | | | | | - A Muhammad Ozi
- National Tuberculosis and Leprosy control Program Nigeria, Mabushi, Nigeria
| | - M Arias
- KNCV Tuberculosis foundation, The Hague, The Netherlands
| | | | - G Dravniece
- KNCV Tuberculosis foundation, The Hague, The Netherlands
- PATH, Kyiv, Ukraine
| | - A Gebhard
- KNCV Tuberculosis foundation, The Hague, The Netherlands
| | | | - R Handayani
- National TB Program Indonesia, Jakarta, Indonesia
| | | | - M Kimerling
- KNCV Tuberculosis foundation, The Hague, The Netherlands
| | - I Koppelaar
- KNCV Tuberculosis foundation, The Hague, The Netherlands
| | | | - B Myrzaliev
- KNCV country office Kyrgyzstan, Bishkek, Kyrgyzstan
| | - B Nsa
- KNCV country office Nigeria, Abuja, Nigeria
| | | | - N Engel
- Maastricht University, Maastricht, The Netherlands
| | - C Mulder
- KNCV Tuberculosis foundation, The Hague, The Netherlands
- Amsterdam Institute for Global Health and Development, Amsterdam University Medical Center, Amsterdam, The Netherlands
| | - S van den Hof
- KNCV Tuberculosis foundation, The Hague, The Netherlands
- National Institute for Public Health and the Environment, Bilthoven, The Netherlands
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Daftary A, Furin J, Zelnick JR, Venkatesan N, Steingart K, Smelyanskaya M, Seepamore B, Schoeman I, Reid M, Padayatchi N, O Donnell MR, Mistry N, McKenna L, Mahbub T, Macdonald H, Loveday M, Law S, LaCourse SM, Jaramillo E, Janssen R, Hirsch-Moverman Y, Friedland G, Creswell J, Chorna Y, Chikovore J, Brigden G, Boffa J, Boehme C, Atre S, Amico KR, Acquah R, Engel N. TB and women: a call to action. Int J Tuberc Lung Dis 2020; 24:1312-1315. [PMID: 33317679 DOI: 10.5588/ijtld.20.0414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- A Daftary
- Dahdaleh Institute of Global Health Research, York University, Toronto, ON, Canada,Centre for the AIDS Programme of Research in South Africa, University of KwaZulu-Natal, Durban, South Africa
| | - J Furin
- Department of Global Health and Social Medicine, Harvard Medical School, Boston, MA, USA
| | - J R Zelnick
- Touro College Graduate School of Social Work, New York, NY, USA
| | | | - K Steingart
- Cochrane Infectious Diseases Group, Liverpool School of Tropical Medicine, Liverpool, UK
| | | | - B Seepamore
- Department of Social Work, University of KwaZulu-Natal, Durban, South Africa
| | | | - M Reid
- Institute for Global Health Sciences, University of California San Francisco, San Francisco, CA, USA
| | - N Padayatchi
- Centre for the AIDS Programme of Research in South Africa, University of KwaZulu-Natal, Durban, South Africa
| | - M R O Donnell
- Columbia University Medical Centre, New York, NY, USA
| | - N Mistry
- Dahdaleh Institute of Global Health Research, York University, Toronto, ON, Canada
| | - L McKenna
- Treatment Action Group, New York, NY, USA
| | - T Mahbub
- Médecins Sans Frontières, Mumbai, India
| | - H Macdonald
- University of Cape Town, Cape Town, South Africa
| | - M Loveday
- Centre for the AIDS Programme of Research in South Africa, University of KwaZulu-Natal, Durban, South Africa, Health Systems Research Unit, South African Medical Research Council, Cape Town, South Africa
| | - S Law
- Department of Global Health and Social Medicine, Harvard Medical School, Boston, MA, USA
| | - S M LaCourse
- Departments of Medicine and Global Health, University of Washington, Seattle, WA, USA
| | - E Jaramillo
- World Health Organization, Geneva, Switzerland
| | - R Janssen
- Department of Health, Ethics & Society, Maastricht University, Maastricht, the Netherlands
| | - Y Hirsch-Moverman
- ICAP at Columbia University´s Mailman School of Public Health, New York, NY, USA
| | - G Friedland
- Yale School of Medicine, Yale University, New Haven, CT, USA
| | - J Creswell
- Stop TB Partnership, Geneva, Switzerland
| | - Y Chorna
- Europe TB Coalition, Kiev, Ukraine
| | - J Chikovore
- Human Sciences Research Council, Durban, South Africa
| | - G Brigden
- Department of Tuberculosis, International Union Against Tuberculosis and Lung Disease (The Union), Geneva, Switzerland
| | - J Boffa
- Dahdaleh Institute of Global Health Research, York University, Toronto, ON, Canada, Centre for Rural Health, University of KwaZulu-Natal, Durban, South Africa
| | - C Boehme
- Foundation for Innovative New Diagnostics, Geneva, Switzerland
| | - S Atre
- D Y Patil Medical College, Hospital & Research Centre, Pune, India
| | - K R Amico
- University of Michigan, Ann Arbor, MI, USA
| | - R Acquah
- Médecins Sans Frontières, Cape Town, South Africa
| | - N Engel
- Department of Health, Ethics & Society, Maastricht University, Maastricht, the Netherlands
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Pai NP, Smallwood M, Gulati D, Lapczak N, Musten A, Gaydos C, Johnston C, Steben M, Wong T, Engel N, Kim J. What do Key Stakeholders Think About HIV Self-Testing in Canada? Results from a Cross-Sectional Survey. AIDS Behav 2018; 22:606-615. [PMID: 28439755 PMCID: PMC5818562 DOI: 10.1007/s10461-017-1764-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Human immunodeficiency virus (HIV) self-testing presents an empowering alternative to facility-based testing for reaching undiagnosed HIV infected individuals, but is not currently available in Canada. We surveyed stakeholders (clinical providers, public health professionals, researchers) engaged in HIV testing initiatives nationwide to identify the concerns, opportunities and challenges to implementing HIV self-testing in Canada. An online cross-sectional survey was disseminated by the Canadian Institutes of Health Research Centre for REACH 2.0 National HIV & sexually transmitted and blood borne infections working group to stakeholders nationwide, with a target sample size of 200. Quantitative and qualitative data were analyzed using a mixed-methods, respondent-informed approach, to inform subsequent HIV self-testing in a country where self-testing is not yet accessible. A total of 183 responses were received. A majority (70.7%) (128/181) felt that self-testing was a necessary investment to reach the undiagnosed. 64.6% (117/181) felt that self-tests should be made available to their clients and 71.5% (128/179) of respondents agreed that self-test instructions required improvements. However, 50% (90/180) felt that self-testing will pose an economic challenge to current HIV testing models. Regardless, 21% urged for timely action and availability of HIV self-tests. Thematic analyses reflected the following concerns: (a) need for affordable self-tests, (b) need for expedited, customized, and accessible linkages to counselling, (c) concern for patients to cope with positive self-test results, (d) accuracy of self-tests to detect acute HIV and (e) liability in the context of non-disclosure. Stakeholders agreed to the provision of an option of HIV self-testing to reach the undiagnosed individuals. Concerns regarding costs and accuracy of self-tests, expedited linkages to counselling, and integration of self-test within prevailing HIV testing models, will need to be addressed before their widespread implementation.
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Affiliation(s)
- N Pant Pai
- Division of Clinical Epidemiology and Infectious Diseases, Faculty of Medicine, McGill University Health Centre, Montreal, QC, Canada.
| | - M Smallwood
- Division of Clinical Epidemiology and Infectious Diseases, Faculty of Medicine, McGill University Health Centre, Montreal, QC, Canada
| | - D Gulati
- Maastricht University, Maastricht, The Netherlands
| | - N Lapczak
- Division of Clinical Epidemiology and Infectious Diseases, Faculty of Medicine, McGill University Health Centre, Montreal, QC, Canada
| | | | - C Gaydos
- Division of Infectious Diseases, Johns Hopkins University, Baltimore, MD, USA
| | - C Johnston
- Canadian AIDS Treatment Information Exchange, Toronto, ON, Canada
| | | | - T Wong
- Public Health Agency of Canada, Toronto, ON, Canada
| | - N Engel
- Maastricht University, Maastricht, The Netherlands
| | - J Kim
- National Labs Canada, Winnipeg, MB, Canada
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Macintyre K, Bakker MI, Bergson S, Bhavaraju R, Bond V, Chikovore J, Colvin C, Craig GM, Cremers AL, Daftary A, Engel N, France NF, Jaramillo E, Kimerling M, Kipp A, Krishnaratne S, Mergenthaler C, Ngicho M, Redwood L, Rood EJJ, Sommerland N, Stangl A, van Rie A, van Brakel W, Wouters E, Zwerling A, Mitchell EMH. Defining the research agenda to measure and reduce tuberculosis stigmas. Int J Tuberc Lung Dis 2017; 21:87-96. [DOI: 10.5588/ijtld.17.0151] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
| | - M. I. Bakker
- KIT Royal Tropical Institute, Amsterdam, The Netherlands
| | - S. Bergson
- KNCV Tuberculosis Foundation, The Hague, The Netherlands
| | - R. Bhavaraju
- Global Tuberculosis Institute, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
| | - V. Bond
- London School of Tropical Medicine & Hygiene, London, UK, Zambart, University of Zambia, Lusaka, Zambia
| | - J. Chikovore
- Human Sciences Research Council, Durban, South Africa
| | - C. Colvin
- US Agency for International Development Global Health Bureau, Washington DC, USA
| | - G. M. Craig
- Centre for Research in Primary and Community Care, School of Health and Social Work, University of Hertfordshire, Hatfield, UK
| | - A. L. Cremers
- Amsterdam Institute for Global Health and Development, Amsterdam, The Netherlands
| | - A. Daftary
- Department of Epidemiology, McGill University, Montreal, Quebec, Canada
| | - N. Engel
- Department of Health, Ethics & Society/Care And Public Health Research Institute, University of Maastricht, Maastricht, The Netherlands
| | - N. Ferris France
- The Work for Change/Irish Forum for Global Health, Dublin, Ireland
| | - E. Jaramillo
- Global TB Programme, World Health Organization, Geneva, Switzerland
| | - M. Kimerling
- KNCV Tuberculosis Foundation, The Hague, The Netherlands
| | - A. Kipp
- Institute for Medicine and Public Health, Vanderbilt University, Nashville, Tennessee, USA
| | | | | | - M. Ngicho
- KNCV Tuberculosis Foundation, The Hague, The Netherlands
| | - L. Redwood
- University of Sydney, Sydney, New South Wales, Australia
| | - E. J. J. Rood
- KIT Royal Tropical Institute, Amsterdam, The Netherlands
| | - N. Sommerland
- Department of Sociology, Centre for Longitudinal and Life Course Studies, University of Antwerp, Antwerp, Belgium
| | - A. Stangl
- International Center for Research on Women, Stigma Action Network Secretariat, Washington DC, USA
| | | | - W. van Brakel
- Netherlands Leprosy Relief, Amsterdam, The Netherlands
| | - E. Wouters
- Department of Sociology, Centre for Longitudinal and Life Course Studies, University of Antwerp, Antwerp, Belgium
| | - A. Zwerling
- Department of Epidemiology, University of Ottawa, Ontario, Canada
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Zoellner AK, Fritsch S, Prevalsek D, Engel N, Hubmann M, Reibke R, Rieger CT, Hellmuth JC, Haas M, Mumm F, Herold T, Ledderose G, Hiddemann W, Dreyling M, Hausmann A, Tischer J. Sequential therapy combining clofarabine and T-cell-replete HLA-haploidentical haematopoietic SCT is feasible and shows efficacy in the treatment of refractory or relapsed aggressive lymphoma. Bone Marrow Transplant 2015; 50:679-84. [PMID: 25642765 DOI: 10.1038/bmt.2014.328] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 12/04/2014] [Accepted: 12/17/2014] [Indexed: 01/25/2023]
Abstract
Prognosis is poor for patients with biologically aggressive Non-Hodgkin lymphoma (NHL), refractory to chemotherapy or relapsed after autologous transplantation, especially when no disease control before allogeneic transplantation is achieved. In 16 patients (median age 53, median prior regimes 5) with relapsed or refractory non-remission NHL, we analysed retrospectively the efficacy of a sequential therapy comprising clofarabine re-induction followed by a reduced-intensity conditioning with fludarabine, CY and melphalan, and T-cell-replete HLA-haploidentical transplantation. High-dose CY was utilized post-transplantation. All patients engrafted. Early response (day +30) was achieved in 94%. Treatment-related grade III-IV toxicity occurred in 56%, most commonly transient elevation of transaminases (36%), while there was a low incidence of infections (19% CMV reactivation, 19% invasive fungal infection) and GVHD (GVHD: acute III-IV: 6%; mild chronic: 25%). One-year non-relapse mortality was 19%. After a median follow-up of 21 months, estimated 1- and 2-year PFS was 56 and 50%, respectively, with 11 patients (69%) still alive after 2 years. In summary, sequential therapy is feasible and effective and provides an acceptable toxicity profile in high-risk non-remission NHL. Presumably, cytotoxic reinduction with clofarabine provides enough remission time for the graft-versus lymphoma effect of HLA-haploidentical transplantation to kick in, even in lymphomas that are otherwise chemo-refractory.
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Affiliation(s)
- A-K Zoellner
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - S Fritsch
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - D Prevalsek
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - N Engel
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - M Hubmann
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - R Reibke
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - C T Rieger
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - J C Hellmuth
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - M Haas
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - F Mumm
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - T Herold
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - G Ledderose
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - W Hiddemann
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - M Dreyling
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
| | - A Hausmann
- 1] Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany [2] Department I of Internal Medicine, Klinikum München-Schwabing, Munich, Germany
| | - J Tischer
- Ludwig-Maximilians-University Hospital of Munich-Grosshadern, Department III of Internal Medicine, Hematopoietic Stem Cell Transplantation, Munich, Germany
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Neuberger M, Paustian C, Hilton T, Engel N, Reu S, Linder A, Huber R, Hatz R, Winter H. P11. Developing an immunotherapy strategy for the effective treatment of patients with Non Small Cell Lung Cancer (NSCLC): strategies to evaluate immunity in patients on clinical trials. J Immunother Cancer 2014. [PMCID: PMC4072310 DOI: 10.1186/2051-1426-2-s2-p2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
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Hinshaw H, Engel N, Sampene E, Zorn K. Ten-year experience with a multidisciplinary high-risk program. Gynecol Oncol 2013. [DOI: 10.1016/j.ygyno.2013.04.302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ubhenin A, Uwakwe A, Falodun A, Engel N, Onwuka F, Langer P. Anti-proliferative and Pro-apoptotic Effects ofCaesalpinia bonducExtract and its Fractions in Estrogen-Sensitive Human Breast Adenocarcinoma Cell Line. ACTA ACUST UNITED AC 2013. [DOI: 10.1080/10496475.2012.762725] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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11
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Engel N, Oppermann C, Falodun A, Kragl U. Proliferative effects of five traditional Nigerian medicinal plant extracts on human breast and bone cancer cell lines. J Ethnopharmacol 2011; 137:1003-1010. [PMID: 21782919 DOI: 10.1016/j.jep.2011.07.023] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2011] [Revised: 06/14/2011] [Accepted: 07/06/2011] [Indexed: 05/31/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The medicinal plants Hunteria umbellata (HUL), Cola lepidota (CCL), Persea americana leaf (PAL), Root bark of Persea americana (RPA) and Plukenetia conophora (PCL) are used in Nigerian traditional medicine for the treatment of cancer and cancer related diseases. AIM OF THE STUDY To scientifically evaluate the cell proliferative and apoptotic effects of the plants extracts using breast and osteocarcinoma cell lines, and also to identify the possible components via LC-MS to have a kind of chemical fingerprint. MATERIALS AND METHODS The antiproliferative and apoptotic effects of methanolic extracts (10 μg/ml) of the five medicinal plants were subjected to in vitro evaluation using four cancer cell lines (breast-MCF-7 and BT-20; Osteocarcinoma-MG-63 and Saos-2) measured by flow cytometry. Non-tumorigenic controls MCF-12A and primary isolated osteoblasts (POB) were chosen to eliminate negative influence on healthy tissue. RESULTS Of the five extracts RPA demonstrated a significant (P<0.05) anti-proliferative activity against estrogen receptor positive breast cancer cell lines (MCF-7). The proliferative phase was decreased by 18%, whereas, a significant increase in cell proliferation (about 27%) was observed for RPA at a concentration of 10 μg/ml. PCL, CCL, HUL and PAL did not show marked inhibition of the proliferation of cell line MCF-7. CONCLUSION These results give suggestive evidence that the plant extracts exhibit some correlation between the claimed ethnomedicinal uses and the cell proliferative activity. RPA extract includes chemical compounds with estrogen-like activity and validates its potential use as anticancer agent, particularly against breast carcinoma; provided important information potentially helpful in drug designing and discovery. Further studies will involve the isolation of anti tumour compounds in RPA by LC-MS and detailed mechanism of anticancer activities.
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Affiliation(s)
- N Engel
- Department of Cell Biology, Biomedical Research Center, University of Rostock, Schillingallee 69, 18057 Rostock, Germany
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Lichtenstein S, Teufel U, Weiland C, Engel N, Engelmann G, Hoffmann G, Grulich-Henn J. Adipositasprävention in Grundschulen. Monatsschr Kinderheilkd 2011. [DOI: 10.1007/s00112-011-2467-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Lichtenstein S, Teufel U, Weiland C, Engel N, Engelmann G, Hoffmann GF, Grulich-Henn J. Ein 6-monatiges Präventionsprogramm vermindert das Adipositasrisiko von Grundschülern. Klin Padiatr 2009. [DOI: 10.1055/s-0029-1214256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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John H, Schmid D, Strebel R, Dabew E, Engel N, Hauri D. 455Robot assisted versus conventional laparoscopic radical prostatectomy — Prospective single centre study. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/s1569-9056(05)80461-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Fitzsimons C, Engel N, Durán H, Policastro L, Cricco G, Martín G, Molinari B, Rivera E. Histamine production in mouse epidermal keratinocytes is regulated during cellular differentiation. Inflamm Res 2001; 50 Suppl 2:S100-1. [PMID: 11411573 DOI: 10.1007/pl00022378] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Affiliation(s)
- C Fitzsimons
- Laboratorio de Radioisótopos, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Argentina
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Abstract
A new type of chlorophyll catabolite was isolated from extracts of de-greened primary leaves of barley (Hordeum vulgare cv. Lambic). Its constitution was elucidated by one-dimensional and two-dimensional [(1)H,(13)C]-homo- and heteronuclear NMR spectroscopic techniques and by high resolution mass spectroscopy. The isolated catabolite, a water-soluble, colorless, and nonfluorescent linear tetrapyrrole, resembles urobilinogen in which one of the propionic side chains forms a five membered isocylic ring system, indicating its origin from the chlorophylls.
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Affiliation(s)
- F G Losey
- Institute of Organic Chemistry, University of Fribourg, Chemin du Musée 9, CH-1700 Fribourg, Switzerland
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17
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Molnár I, Schupp T, Ono M, Zirkle R, Milnamow M, Nowak-Thompson B, Engel N, Toupet C, Stratmann A, Cyr DD, Gorlach J, Mayo JM, Hu A, Goff S, Schmid J, Ligon JM. The biosynthetic gene cluster for the microtubule-stabilizing agents epothilones A and B from Sorangium cellulosum So ce90. Chem Biol 2000; 7:97-109. [PMID: 10662695 DOI: 10.1016/s1074-5521(00)00075-2] [Citation(s) in RCA: 252] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
BACKGROUND Epothilones are produced by the myxobacterium Sorangium cellulosum So ce90, and, like paclitaxel (Taxol((R))), they inhibit microtubule depolymerisation and arrest the cell cycle at the G2-M phase. They are effective against P-glycoprotein-expressing multiple-drug-resistant tumor cell lines and are more water soluble than paclitaxel. The total synthesis of epothilones has been achieved, but has not provided an economically viable alternative to fermentation. We set out to clone, sequence and analyze the gene cluster responsible for the biosynthesis of the epothilones in S. cellulosum So ce90. RESULTS A cluster of 22 open reading frames spanning 68,750 base pairs of the S. cellulosum So ce90 genome has been sequenced and found to encode nine modules of a polyketide synthase (PKS), one module of a nonribosomal peptide synthetase (NRPS), a cytochrome P450, and two putative antibiotic transport proteins. Disruptions in the genes encoding the PKS abolished epothilone production. The first PKS module and the NRPS module are proposed to co-operate in forming the thiazole heterocycle of epothilone from an acetate and a cysteine by condensation, cyclodehydration and subsequent dehydrogenation. The remaining eight PKS modules are responsible for the elaboration of the rest of the epothilone carbon skeleton. CONCLUSIONS The overall architecture of the gene cluster responsible for epothilone biosynthesis has been determined. The availability of the cluster should facilitate the generation of designer epothilones by combinatorial biosynthesis approaches, and the heterologous expression of epothilones in surrogate microbial hosts.
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Affiliation(s)
- I Molnár
- Novartis Agribusiness Biotechnology Research, Inc., PO Box 12257, NC 27709, USA.
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Abstract
This study reveals by in vivo deuterium labeling that in higher plants chlorophyll (Chl) b is converted to Chl a before degradation. For this purpose, de-greening of excised green primary leaves of barley (Hordeum vulgare) was induced by permanent darkness in the presence of heavy water (80 atom % (2)H). The resulting Chl a catabolite in the plant extract was subjected to chemical degradation by chromic acid. 3-(2-Hydroxyethyl)-4-methyl-maleimide, the key fragment that originates from the Chl catabolite, was isolated. High resolution (1)H-, (2)H-NMR and mass spectroscopy unequivocally demonstrates that a fraction of this maleimide fragment consists of a mono-deuterated methyl group. These results suggest that Chl b is converted into Chl a before degradation. Quantification proves that the initial ratio of Chl a:Chl b in the green plant is preserved to about 60-70% in the catabolite composition isolated from yellowing leaves. The incorporation of only one deuterium atom indicates the involvement of two distinguishable redox enzymes during the conversion.
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Affiliation(s)
- P Folly
- Institut für Organische Chemie der Universität Fribourg, Ch. du Musée 9, CH-1700 Fribourg, Switzerland
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19
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Fitzsimons C, Durán H, Engel N, Molinari B, Rivera E. Changes in H2 receptor expression and coupling during Ca2+-induced differentiation in mouse epidermal keratinocytes. Inflamm Res 1999; 48 Suppl 1:S73-4. [PMID: 10350170 DOI: 10.1007/s000110050412] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Affiliation(s)
- C Fitzsimons
- Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Argentina.
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20
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Abstract
In this work we analyze the hypothesis that tumors induced by i.p. N-nitroso-N-methylurea injection express EGF-like peptides and EGF receptors which could be involved in the response to hormone manipulation. EGF receptors (EGFR) were determined in the purified membrane fraction of tumors from control and ovariectomized (OVX) animals and no significant differences were found in either maximal binding capacities (Q) or dissociation constants (Kd) between them. Neither did we observe differences between tumors that regressed (HR) or continued growing (HU) after ovariectomy. In order to test the ability of EGFR to trigger a biological response we measured the production of second messengers inositol triphosphates (IP3) and cAMP levels; we found that EGF increases IP3 production in a dose-dependent way, while cAMP levels were not affected. In addition, EGF was able to induce in vitro cell proliferation in a concentration-dependent manner when tested in primary cultures of tumor cells by the clonogenic soft agar technique. EGF/TGF-alpha activity was determined by a radioreceptor assay in tumor cytosols from control and OVX rats. Results showed a trend to lower values in tumors from OVX rats, but no differences between HR and HU tumors. A positive correlation was found between EGF/TGF-alpha activity and progesterone receptor maximal binding capacity. When we tested the action of estradiol and EGF added together to primary cultures of tumor cells we found an additive effect on cell proliferation. The study of steady state mRNA levels showed that E2 increases PgR and c-myc mRNA levels in HR but not in HU tumors. In conclusion, the autocrine loop EGFR-EGF/TGF-alpha present in all tumors is hormonally regulated, possibly by Pg, but is not related to the tumor response to ovariectomy.
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Affiliation(s)
- G Martin
- Laboratorio de Radioisótopos, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Argentina
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Schupp T, Toupet C, Engel N, Goff S. Cloning and sequence analysis of the putative rifamycin polyketide synthase gene cluster from Amycolatopsis mediterranei. FEMS Microbiol Lett 1998; 159:201-7. [PMID: 9503613 DOI: 10.1111/j.1574-6968.1998.tb12861.x] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The 54-kbp Type I polyketide synthase gene cluster, most probably involved in rifamycin biosynthesis by Amycolatopsis mediterranei, was cloned in E. coli and completely sequenced. The DNA encodes five closely packed, very large open reading frames reading in one direction. As expected from the chemical structure of rifamycins, ten polyketide synthase modules and a CoA ligase domain were identified in the five open reading frames which contain one to three polyketide synthase modules each. The order of the functional domains on the DNA probably reflects the order in which they are used because each of the modules contains the predicted acetate or propionate transferase, dehydratase, and beta-ketoacyl-ACP reductase functions, required for the respective step in rifamycin biosynthesis.
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Affiliation(s)
- T Schupp
- Novartis Pharma AG, Basel, Switzerland
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Licht P, Engel N, Fischer O, Munzer B, Siebzehnrübl E, Wildt L. O-013. HCG does not directly regulate circulating concentrations of vascular endothelial growth factor in IVF and embryo transfer cycles. Hum Reprod 1997. [DOI: 10.1093/humrep/12.suppl_2.6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Cricco G, Engel N, Croci M, Davio C, Martín G, Fitzimons C, Bergoc R, Rivera E. Fluoromethylhistidine inhibits tumor growth without producing depletion of endogenous histamine. Inflamm Res 1997; 46 Suppl 1:S59-60. [PMID: 9098765] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Affiliation(s)
- G Cricco
- Laboratorio de Radioisótopos, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Argentina
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Engel N, Olmo MT, Coleman CS, Medina MA, Pegg AE, Sánchez-Jiménez F. Experimental evidence for structure-activity features in common between mammalian histidine decarboxylase and ornithine decarboxylase. Biochem J 1996; 320 ( Pt 2):365-8. [PMID: 8973541 PMCID: PMC1217940 DOI: 10.1042/bj3200365] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Common protein motifs between histidine decarboxylase (HDC) and ornithine decarboxylase (ODC) were detected by computational analysis. Mutants were generated and expressed in vitro. In both enzymes, terminal PEST-region-containing fragments are not essential for decarboxylation (PEST regions are sequence fragments enriched in proline, glutamic acid, serine and threonine residues in a hydrophilic fragment flanked by cationic amino acids). The substitution of a very well conserved histidine residue by alanine causes a severalfold increase of the apparent K(m) values for the respective substrates.
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Affiliation(s)
- N Engel
- Laboratorio de Bioquímica y Biología Molecular, Facultad de Ciencias, Universidad de Málaga, Spain
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Engel N, Cricco G, Davio C, Martin G, Croci M, Fitzsimons C, Bergoc R, Rivera E. Histamine regulates the expression of histidine decarboxylase in N-nitroso-N-methylurea (NMU)-induced mammary tumors in rats. Inflamm Res 1996; 45 Suppl 1:S64-5. [PMID: 8696935 DOI: 10.1007/bf03354091] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Affiliation(s)
- N Engel
- Radioisotopes Laboratory, Faculty of Pharmacy and Biochemistry, Buenos Aires University, Argentina
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Abstract
Only recently have products of the enzymatic breakdown of the chlorophylls been characterized for the first time. All catabolites isolated until now from a chlorophyte and from angiosperms have in common the position at which the primary oxygenative ring cleavage occurs, yielding linear tetrapyrroles (19-formyl-1[21H,22H]bilinones). In vivo studies of 18,18O2 incorporation in one of the chlorophyll catabolites isolated from Chlorella protothecoides show unequivocally that of the two oxygen atoms inserted into the pigment, only the formyl oxygen originates from dioxygen whereas the other one, the lactamic oxygen atom, derives from water. These findings suggest a monooxygenase-catalyzed primary process in the catabolism of chlorophyll.
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Affiliation(s)
- C Curty
- Institut für Organische Chemie der Universität, Fribourg, Switzerland
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Cricco GP, Davio CA, Martin G, Engel N, Fitzsimons CP, Bergoc RM, Rivera ES. Histamine as an autocrine growth factor in experimental mammary carcinomas. Agents Actions 1994; 43:17-20. [PMID: 7741034 DOI: 10.1007/bf02005757] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
In order to determine the role of endogenous histamine in the regulation of cell growth, the in vitro action of fluoromethyl-histidine (MFMH) was studied in experimental mammary carcinomas induced in rats. Tumor cells were cultured in soft agar using the clonogenic agar technique. The MFMH was added in different concentrations (0.01-100 microM). The effect observed was a 60% inhibition on colony formation with a maximal effect at concentrations over 10 microM. This action was completely reverted by the H2 agonists dimaprit and arpromidine with an IC50 value of 1 microM. The action of the H2 agonists when added alone was a significant increase in cell proliferation (135%), while the H1 agonist produced a dose-dependent inhibition on cell growth. In these experimental carcinomas endogenous histamine is critical for cell proliferation and one of its major effects may be the stimulation of cell growth by acting on specific H2 membrane receptors.
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Affiliation(s)
- G P Cricco
- Laboratorio de Radioisótopos, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Argentina
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Engel N, Jenny TA, Mooser V, Gossauer A. Chlorophyll catabolism in Chlorella protothecoides. Isolation and structure elucidation of a red bilin derivative. FEBS Lett 1991; 293:131-3. [PMID: 1959645 DOI: 10.1016/0014-5793(91)81168-8] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- N Engel
- Institut für Organische Chemie der Universität Friburg, Switzerland
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Engel N. A general sharing coefficient for the classification of structures with defined polyhedron complexes. Acta Crystallogr Sect B 1991. [DOI: 10.1107/s0108768190012344] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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31
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Weiger R, Engel N. [Denta-Solar--comparison with a traditional toothbrush]. Oralprophylaxe 1991; 13:32-6. [PMID: 1931198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
This paper reports on the clinical efficacy of a toothbrush (Denta-Solar) with an integrated TiO2 semiconductor element as compared to a conventional toothbrush. A significant reduction in the papilla bleeding index and the plaque indices was recorded in subjects using the Denta-Solar brush; the tartar situation near the gingivae was seen to deteriorate in those using conventional toothbrushes. This supports the assumption that the plaque reduction is due to the special construction features of the Denta-Solar.
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Affiliation(s)
- R Weiger
- Zentrum für Zahn-, Mund- und Kieferheilkunde der Universität Tübingen
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Parthé E, Engel N. Relation between tetrahedron connections and composition for structures with tetrahedral anion complexes. Acta Crystallogr B Struct Sci 1986. [DOI: 10.1107/s0108768186097732] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Engel N, Yvon K. The crystal structure of partheite. Acta Crystallogr A 1984. [DOI: 10.1107/s0108767384092606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Hovestreydt E, Engel N, Klepp K, Chabot B, Parthé E. Equiatomic ternary rare earth-transition metal silicides, germanides and gallides. ACTA ACUST UNITED AC 1982. [DOI: 10.1016/0022-5088(82)90075-3] [Citation(s) in RCA: 168] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Chabot B, Engel N, Parthé E. Trirhodium scandium heptasilicide and triiridium scandium heptasilicide with a new rhombohedral structure type. Acta Crystallogr B Struct Sci 1981. [DOI: 10.1107/s0567740881003877] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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