54 results on '"Nadine Muller"'
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2. In the Shadow of the Pandemic: Examining Therapists’ Perceptions of Work-Related Stress in the Late Stages of the COVID-19 Pandemic in Germany
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Smilla Johann, Megan Evans, Rike Böttcher, Nadine Muller, Barbara Buchberger, Charbel El Bcheraoui, and Heide Weishaar
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occupational stress ,COVID-19 ,therapists ,healthcare ,health personnel ,working conditions ,Medicine - Abstract
Background/Objectives: The previous literature has identified increased work-related stress among healthcare workers (HCWs) during the COVID-19 pandemic. This study analyzes work-related perceived stress experienced by therapists during the COVID-19 pandemic in Germany to identify potential for supporting this crucial group of HCWs in future health crises. Methods: Survey data on stress, measured through the Perceived Stress Scale 4, among HCWs (therapists n = 612, nurses n = 501, and doctors n = 461) were analyzed using descriptive statistics, and data from four semi-structured interviews and seven focus group discussions with therapists were analyzed using thematic content analysis. Data were collected from March to September 2022. Results: Therapists reported similar stress levels to other HCWs, with the reporting of perceived stress differing between work contexts. Eight stressors were identified through the thematic analysis: (1) concerns about maintaining the quality of care, (2) uncertainty about the future, (3) workload, (4) interactions with colleagues and patients, (5) PPE, (6) the risk of infection, (7) insufficient information flow, and (8) the lack of public and political recognition. Conclusions: This study emphasizes the distinct challenges that therapists experienced during the COVID-19 pandemic. By identifying the factors that contributed to the stress experienced, the study can inform targeted support strategies which can enhance therapists’ work, ultimately contributing to sustaining essential healthcare services during public health crises.
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- 2024
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3. Call for action: addressing the alarming surge of HIV in Madagascar
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Mihaja Raberahona, Xavier Vallès, Mamy Jean de Dieu Randria, Andosoa Ratefiharimanana, Julius Valentin Emmrich, Rivo Andry Rakotoarivelo, Diavolana Andrianarimanana-Köcher, Emmanuel Harizaka Andriamasy, Anne-Caroline Benski, Andrew Walsh, Kyle Robinson, and Nadine Muller
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Medicine (General) ,R5-920 ,Infectious and parasitic diseases ,RC109-216 - Published
- 2024
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4. Inter-facility transfers for emergency obstetrical and neonatal care in rural Madagascar: a cost-effectiveness analysis
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Till Bärnighausen, Mara Anna Franke, Rinja Mitolotra Ranaivoson, Mahery Rebaliha, Samuel Knauss, Julius Valentin Emmrich, Nadine Muller, Kim Nordmann, Anna Frühauf, and Zavaniarivo Rapanjato
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Medicine - Abstract
Context There is a substantial lack of inter-facility referral systems for emergency obstetrical and neonatal care in rural areas of sub-Saharan Africa. Data on the costs and cost-effectiveness of such systems that reduce preventable maternal and neonatal deaths are scarce.Setting We aimed to determine the cost-effectiveness of a non-governmental organisation (NGO)-run inter-facility referral system for emergency obstetrical and neonatal care in rural Southern Madagascar by analysing the characteristics of cases referred through the intervention as well as its costs.Design We used secondary NGO data, drawn from an NGO’s monitoring and financial administration database, including medical and financial records.Outcome measures We performed a descriptive and a cost-effectiveness analysis, including a one-way deterministic sensitivity analysis.Results 1172 cases were referred over a period of 4 years. The most common referral reasons were obstructed labour, ineffective labour and eclampsia. In total, 48 neonates were referred through the referral system over the study period. Estimated cost per referral was US$336 and the incremental cost-effectiveness ratio (ICER) was US$70 per additional life-year saved (undiscounted, discounted US$137). The sensitivity analysis showed that the intervention was cost-effective for all scenarios with the lowest ICER at US$99 and the highest ICER at US$205 per additional life-year saved. When extrapolated to the population living in the study area, the investment costs of the programme were US$0.13 per person and annual running costs US$0.06 per person.Conclusions In our study, the inter-facility referral system was a very cost-effective intervention. Our findings may inform policies, decision-making and implementation strategies for emergency obstetrical and neonatal care referral systems in similar resource-constrained settings.
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- 2024
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5. Usability and acceptance of a mobile health wallet for pregnancy-related healthcare: A mixed methods study on stakeholders' perceptions in central Madagascar.
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Etienne Lacroze, Anna Frühauf, Kim Nordmann, Zavaniarivo Rampanjato, Nadine Muller, Jan-Walter De Neve, Ralisimalala Andriamampianina, Elsa Rajemison, Till Bärnighausen, Samuel Knauss, and Julius Valentin Emmrich
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Medicine ,Science - Abstract
BackgroundSeveral sub-Saharan African countries use digital financial services to improve health financing, especially for maternal and child health. In cooperation with the Malagasy Ministry of Health, the NGO Doctors for Madagascar is implementing a mobile health wallet for maternal health care in public-sector health facilities in Madagascar. Our aim was to explore the enabling and limiting factors related to the usability and acceptance of the Mobile Maternal Health Wallet (MMHW) intervention during its implementation.MethodsWe conducted a cross-sectional, mixed methods study with mothers and pregnant women and facility- (FBHWs) and community-based (CHWs) health workers from public-sector health facilities in three districts of the Analamanga region in Madagascar. We used a convergent design in collecting and analyzing quantitative and qualitative data. We performed one-stage proportional sampling of women who had signed up for the MMHW. All FBHWs and CHWs at primary care facilities in the intervention area were eligible to participate.Results and significance314 women, 76 FBHWs, and 52 CHWs were included in the quantitative survey. Qualitative data were extracted from in-depth interviews with 12 women and 12 FBHWs and from six focus group discussions with 39 CHWSs. The MMHW intervention was accepted and used by health workers and women from different socioeconomic backgrounds. Main motivations for women to enroll in the intervention were the opportunity to save money for health (30.6%), electronic vouchers for antenatal ultrasound (30.2%), and bonus payments upon reaching a savings goal (27.9%). Main motivation for health workers was enabling pregnant women to save for health, thus encouraging facility-based deliveries (57.9%). Performance-based payments had low motivational value for health workers. Key facilitators were community sensitization, strong women-health worker relationship, decision making at the household level, and repetitive training on the use of the MMHW. Key barriers included limited phone ownership, low level of digital literacy, disinformation concerning the effects of the intervention, and technical problems like slow payout processes.
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- 2023
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6. The 4MOTHERS trial of the impact of a mobile money-based intervention on maternal and neonatal health outcomes in Madagascar: study protocol of a cluster-randomized hybrid effectiveness-implementation trial
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Etienne Lacroze, Till Bärnighausen, Jan Walter De Neve, Sebastian Vollmer, Rolland Marie Ratsimbazafy, Peter Martin Ferdinand Emmrich, Nadine Muller, Elsa Rajemison, Zavaniarivo Rampanjato, Diana Ratsiambakaina, Samuel Knauss, and Julius Valentin Emmrich
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Maternal ,Out-of-pocket payments ,Randomized trial ,Digital health ,Mobile payment ,Sub-Saharan Africa ,Medicine (General) ,R5-920 - Abstract
Abstract Background Mobile money—a service enabling users to receive, store, and send electronic money using mobile phones—has been widely adopted across low- and middle-income economies to pay for a variety of services, including healthcare. However, evidence on its effects on healthcare access and health outcomes are scarce and the possible implications of using mobile money for financing and payment of maternal healthcare services—which generally require large one-time out-of-pocket payments—have not yet been systematically assessed in low-resource settings. The aim of this study is to determine the impact on health outcomes, cost-effectiveness, feasibility, acceptability, and usefulness of mobile phone-based savings and payment service, the Mobile Maternal Health Wallet (MMHW), for skilled healthcare during pregnancy and delivery among women in Madagascar. Methods This is a hybrid effectiveness-implementation type-1 trial, determining the effectiveness of the intervention while evaluating the context of its implementation in Madagascar’s Analamanga region, containing the capital, Antananarivo. Using a stratified cluster randomized design, 61 public-sector primary-care health facilities were randomized within 6 strata to either receive the intervention or not (29 intervention vs. 32 control facilities). The strata were defined by a health facility’s antenatal care visit volume and its capacity to offer facility-based deliveries. The registered pre-specified primary outcomes are (i) delivery at a health facility, (ii) antenatal care visits, and (iii) total healthcare expenditure during pregnancy, delivery, and neonatal period. The registered pre-specified secondary outcomes include additional health outcomes, economic outcomes, and measurements of user experience and satisfaction. Our estimated enrolment number is 4600 women, who completed their pregnancy between July 1, 2020, and December 31, 2021. A series of nested mixed-methods studies will elucidate client and provider perceptions on feasibility, acceptability, and usefulness of the intervention to inform future implementation efforts. Discussion A cluster-randomized, hybrid effectiveness-implementation design allows for a robust approach to determine whether the MMHW is a feasible and beneficial intervention in a resource-restricted public healthcare environment. We expect the results of our study to guide future initiatives and health policy decisions related to maternal and neonatal health and universal healthcare coverage through technology in Madagascar and other countries in sub-Saharan Africa. Trial registration This trial was registered on March 12, 2021: Deutsches Register Klinischer Studien (German Clinical Trials Register), identifier: DRKS00014928 . For World Health Organization Trial Registration Data Set see Additional file 1.
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- 2021
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7. Severe Acute Respiratory Syndrome Coronavirus 2 Outbreak Related to a Nightclub, Germany, 2020
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Nadine Muller, Mareike Kunze, Fabienne Steitz, Neil J. Saad, Barbara Mühlemann, Jörn I. Beheim-Schwarzbach, Julia Schneider, Christian Drosten, Lukas Murajda, Sandra Kochs, Claudia Ruscher, Jan Walter, Nadine Zeitlmann, and Victor M. Corman
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respiratory infections ,severe acute respiratory syndrome coronavirus 2 ,SARS-CoV-2 ,SARS ,COVID-19 ,coronavirus disease ,Medicine ,Infectious and parasitic diseases ,RC109-216 - Abstract
We report an outbreak of coronavirus disease with 74 cases related to a nightclub in Germany in March 2020. Staff members were particularly affected (attack rate 56%) and likely caused sustained viral transmission after an event at the club. This outbreak illustrates the potential for superspreader events and corroborates current club closures.
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- 2021
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8. Facilitators and barriers to the implementation of a Mobile Health Wallet for pregnancy-related health care: A qualitative study of stakeholders' perceptions in Madagascar.
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Nadine Muller, Shannon A McMahon, Jan-Walter De Neve, Alexej Funke, Till Bärnighausen, Elsa N Rajemison, Etienne Lacroze, Julius V Emmrich, and Samuel Knauss
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Medicine ,Science - Abstract
Financial barriers are a major obstacle to accessing maternal health care services in low-resource settings. In Madagascar, less than half of live births are attended by skilled health staff. Although mobile money-based savings and payment systems are often used to pay for a variety of services, including health care, data on the implications of a dedicated mobile money wallet restricted to health-related spending during pregnancy-a mobile health wallet (MHW)-are not well understood. In cooperation with the Madagascan Ministry of Health, this study aims to elicit the perceptions, experiences, and recommendations of key stakeholders in relation to a MHW amid a pilot study in 31 state-funded health care facilities. We conducted a two-stage qualitative study using semi-structured in-depth interviews with stakeholders (N = 21) representing the following groups: community representatives, health care providers, health officials and representatives from phone provider companies. Interviews were conducted in Atsimondrano and Renivohitra districts, between November and December of 2017. Data was coded thematically using inductive and deductive approaches, and found to align with a social ecological model. Key facilitators for successful implementation of the MHW, include (i) close collaboration with existing communal structures and (ii) creation of an incentive scheme to reward pregnant women to save. Key barriers to the application of the MHW in the study zone include (i) disruption of informal benefits for health care providers related to the current cash-based payment system, (ii) low mobile phone ownership, (iii) illiteracy among the target population, and (iv) failure of the MHW to overcome essential access barriers towards institutional health care services such as fear of unpredictable expenses. The MHW was perceived as a potential solution to reduce disparities in access to maternal health care. To ensure success of the MHW, direct demand-side and provider-side financial incentives merit consideration.
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- 2020
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9. Genome-wide DNA methylation analysis pre- and post-lenalidomide treatment in patients with myelodysplastic syndrome with isolated deletion (5q)
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Richard F. Schlenk, Verena Nowak, Georgia Metzgeroth, Stephanie Fey, Esther Schuler, Katja Sockel, Johann-Christoph Jann, Michael Lübbert, Anne Letsch, Gesine Bug, Detlef Haase, Katharina Götze, Julia Meyer, Philippe Schafhausen, Florian Nolte, Wolf-Karsten Hofmann, Daniel Nowak, Anna Hecht, Mark Reinwald, Nadine Muller, Ulrich Germing, Felicitas Thol, Julia Obländer, Torsten Haferlach, Guntram Büsche, and Aristoteles Giagounidis
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Adult ,Male ,Oncology ,medicine.medical_specialty ,Myelodysplastic syndromes ,Antineoplastic Agents ,hemic and lymphatic diseases ,Multicenter trial ,Internal medicine ,Deletion 5q ,medicine ,Humans ,Lenalidomide ,Gene ,Aged ,Aged, 80 and over ,DNA methylation ,Hematology ,business.industry ,Myeloid leukemia ,General Medicine ,Methylation ,Middle Aged ,medicine.disease ,ddc ,Treatment Outcome ,Chromosomes, Human, Pair 5 ,Female ,Original Article ,Chromosome Deletion ,business ,medicine.drug - Abstract
Myelodysplastic syndrome (MDS) with isolated deletion of chromosome 5q (MDS del5q) is a distinct subtype of MDS with quite favorable prognosis and excellent response to treatment with lenalidomide. Still, a relevant percentage of patients do not respond to lenalidomide and even experience progression to acute myeloid leukemia (AML). In this study, we aimed to investigate whether global DNA methylation patterns could predict response to lenalidomide. Genome-wide DNA methylation analysis using Illumina 450k methylation arrays was performed on n=51 patients with MDS del5q who were uniformly treated with lenalidomide in a prospective multicenter trial of the German MDS study group. To study potential direct effects of lenalidomide on DNA methylation, 17 paired samples pre- and post-treatment were analyzed. Our results revealed no relevant effect of lenalidomide on methylation status. Furthermore, methylation patterns prior to therapy could not predict lenalidomide response. However, methylation clustering identified a group of patients with a trend towards inferior overall survival. These patients showed hypermethylation of several interesting target genes, including genes of relevant signaling pathways, potentially indicating the evaluation of novel therapeutic targets. Supplementary Information The online version contains supplementary material available at 10.1007/s00277-021-04492-1.
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- 2021
10. Deceit, Deservingness, and Destitution: Able-Bodied Widows and the New Poor Law
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Nadine Muller
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Cultural Studies ,History ,Literature and Literary Theory ,Visual Arts and Performing Arts ,media_common.quotation_subject ,Poorhouse ,Legislation ,HN ,Criminology ,Deception ,Political science ,Sympathy ,HQ ,Outdoor relief ,Ideology ,Prosperity ,Welfare ,media_common - Abstract
The death of a husband had adverse economic effects for the majority of Victorian women, but for working-class mothers the threat of destitution was an almost inevitable feature of widowhood. Widows, with some restrictions, were entitled to outdoor relief under the Poor Law Amendment Act (1834), and they comprised the largest group of adult paupers outside of the workhouse well into the early twentieth century, outnumbered only and always by their children. Able-bodied widows therefore presented crucial opportunities for poor-law officials in the quest to minimize outdoor relief and make significant reductions in welfare spending. Focusing particularly on the 1830s, 1840s, and 1870s (the first decade of the so-called ‘crusade’ against out-relief), this article examines the competing discourses of deservingness and deception that dominated the representations and treatment of able-bodied widows in poor law legislation, orders, reports, and parliamentary debates. An uneasy combination of sympathy and suspicion shaped officials’ treatment of these women, rendering them ambiguous figures in the dominant dichotomy of the deserving and undeserving poor, potential drains on the economic prosperity of the state, threats to the nuclear family, and, by extension, a danger to the nation’s moral core. These discourses, I suggest, reflect a wider ideological unease with, and attempts to mitigate and police, the widow’s exceptional social status in Victorian Britain as a woman with sexual experience, potential economic independence, and yet no male guardian.
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- 2020
11. Desperately Funny: Victorian Widows & the Comical Misfortunes of Husband Hunting
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Nadine Muller
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Gender Studies ,History ,Arts and Humanities (miscellaneous) ,Victorian era ,Ancient history ,Comedy ,Social Sciences (miscellaneous) ,Period (music) - Abstract
The widow was a much-satirized figure throughout the Victorian era, but humour has rarely featured in studies concerned with the period’s attitudes towards women and death. Widows, whose behaviour ...
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- 2020
12. Severe Acute Respiratory Syndrome Coronavirus 2 Outbreak Related to a Nightclub, Germany, 2020
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Nadine Muller, Mareike Kunze, Nadine Zeitlmann, Fabienne Steitz, Jörn Beheim-Schwarzbach, Victor M. Corman, Sandra Kochs, Neil J. Saad, Jan Walter, Lukas Murajda, Barbara Mühlemann, Christian Drosten, Claudia Ruscher, and Julia Schneider
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Male ,Epidemiology ,Expedited ,Attack rate ,coronavirus ,lcsh:Medicine ,Disease ,medicine.disease_cause ,contact tracing ,Disease Outbreaks ,0302 clinical medicine ,Germany ,030212 general & internal medicine ,Child ,Coronavirus ,Infectious disease transmission ,Food Services ,Middle Aged ,Berlin ,Infectious Diseases ,coronavirus disease ,whole-genome sequencing ,Child, Preschool ,Female ,severe acute respiratory syndrome coronavirus 2 ,Adult ,Microbiology (medical) ,public health practice ,medicine.medical_specialty ,Adolescent ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,education ,030231 tropical medicine ,Viral transmission ,diagnostic testing ,lcsh:Infectious and parasitic diseases ,Young Adult ,respiratory infections ,03 medical and health sciences ,Disease Transmission, Infectious ,Research Letter ,medicine ,Humans ,Severe Acute Respiratory Syndrome Coronavirus 2 Outbreak Related to a Nightclub, Germany, 2020 ,viruses ,lcsh:RC109-216 ,ddc:610 ,SARS ,SARS-CoV-2 ,business.industry ,lcsh:R ,COVID-19 ,Outbreak ,infectious disease transmission ,superspreader event ,zoonoses ,Emergency medicine ,610 Medizin und Gesundheit ,business ,Contact tracing - Abstract
We report an outbreak of coronavirus disease with 74 cases related to a nightclub in Germany in March 2020. Staff members were particularly affected (attack rate 56%) and likely caused sustained viral transmission after an event at the club. This outbreak illustrates the potential for superspreader events and corroborates current club closures.
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- 2020
13. How to Blog About Your Research
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Nadine Muller and Helene Snee
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- 2022
14. Usability and acceptance of a mobile health wallet for pregnancy-related healthcare: A mixed methods study on stakeholders' perceptions in central Madagascar
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Etienne Lacroze, Anna Frühauf, Kim Nordmann, Zavaniarivo Rampanjato, Nadine Muller, Jan-Walter De Neve, Ralisimalala Andriamampianina, Elsa Rajemison, Till Bärnighausen, Samuel Knauss, and Julius Valentin Emmrich
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Community Health Workers ,Multidisciplinary ,Cross-Sectional Studies ,Pregnancy ,Madagascar ,Humans ,Female ,Pregnant Women ,Health Facilities ,Child ,Telemedicine ,Qualitative Research - Abstract
Background Several sub-Saharan African countries use digital financial services to improve health financing, especially for maternal and child health. In cooperation with the Malagasy Ministry of Health, the NGO Doctors for Madagascar is implementing a mobile health wallet for maternal health care in public-sector health facilities in Madagascar. Our aim was to explore the enabling and limiting factors related to the usability and acceptance of the Mobile Maternal Health Wallet (MMHW) intervention during its implementation. Methods We conducted a cross-sectional, mixed methods study with mothers and pregnant women and facility- (FBHWs) and community-based (CHWs) health workers from public-sector health facilities in three districts of the Analamanga region in Madagascar. We used a convergent design in collecting and analyzing quantitative and qualitative data. We performed one-stage proportional sampling of women who had signed up for the MMHW. All FBHWs and CHWs at primary care facilities in the intervention area were eligible to participate. Results and significance 314 women, 76 FBHWs, and 52 CHWs were included in the quantitative survey. Qualitative data were extracted from in-depth interviews with 12 women and 12 FBHWs and from six focus group discussions with 39 CHWSs. The MMHW intervention was accepted and used by health workers and women from different socioeconomic backgrounds. Main motivations for women to enroll in the intervention were the opportunity to save money for health (30.6%), electronic vouchers for antenatal ultrasound (30.2%), and bonus payments upon reaching a savings goal (27.9%). Main motivation for health workers was enabling pregnant women to save for health, thus encouraging facility-based deliveries (57.9%). Performance-based payments had low motivational value for health workers. Key facilitators were community sensitization, strong women-health worker relationship, decision making at the household level, and repetitive training on the use of the MMHW. Key barriers included limited phone ownership, low level of digital literacy, disinformation concerning the effects of the intervention, and technical problems like slow payout processes.
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- 2021
15. A longitudinal study on symptom duration and 60-day clinical course in non-hospitalised COVID-19 cases in Berlin, Germany, March to May, 2020
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Kirsten Pörtner, Neil J. Saad, Felix Moek, Till Bärnighausen, Thomas Zoller, Fabienne Steitz, Nadine Muller, and Lukas Murajda
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Adult ,disease outbreak ,Pediatrics ,medicine.medical_specialty ,Longitudinal study ,Coronavirus disease 2019 (COVID-19) ,Adolescent ,Epidemiology ,prevalence ,Malaise ,Young Adult ,Virology ,Germany ,Symptom duration ,medicine ,Humans ,Longitudinal Studies ,Young adult ,Prospective cohort study ,Pandemics ,Aged ,business.industry ,SARS-CoV-2 ,Research ,Public Health, Environmental and Occupational Health ,COVID-19 ,clinical epidemiology ,Middle Aged ,Dysosmia ,public health surveillance ,Dysgeusia ,Berlin ,signs and symptoms ,Female ,medicine.symptom ,business ,prospective study - Abstract
Background Detailed information on symptom duration and temporal course of patients with mild COVID-19 was scarce at the beginning of the COVID-19 pandemic. Aim We aimed to determine the longitudinal course of clinical symptoms in non-hospitalised COVID-19 patients in Berlin, Germany. Methods Between March and May 2020, 102 confirmed COVID-19 cases in home isolation notified in Berlin, Germany, were sampled using total population sampling. Data on 25 symptoms were collected during telephone consultations (a maximum of four consultations) with each patient. We collected information on prevalence and duration of symptoms for each day of the first 2 weeks after symptom onset and for day 30 and 60 after symptom onset. Results Median age was 35 years (range 18–74), 57% (58/102) were female, and 37% (38/102) reported having comorbidities. During the first 2 weeks, most common symptoms were malaise (94%, 92/98), headache (71%, 70/98), and rhinitis (69%, 68/98). Malaise was present for a median of 11 days (IQR 7–14 days) with 35% (34/98) of cases still reporting malaise on day 14. Headache and muscle pain mostly occurred during the first week, whereas dysosmia and dysgeusia mostly occurred during the second week. Symptoms persisted in 41% (39/95) and 20% (18/88) of patients on day 30 and 60, respectively. Conclusion Our study shows that a significant proportion of non-hospitalised COVID-19 cases endured symptoms for at least 2 months. Further research is needed to assess the frequency of long-term adverse health effects in non-hospitalised COVID-19 patients.
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- 2021
16. Crossing the Last Mile of TB Care in Rural Southern Madagascar: A Multistakeholder Initiative
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Nadine, Muller, Fierenantsoa, Ranjaharinony, Miandrisoa, Etrahagnane, Anna, Frühauf, Turibio, Razafindranaivo, Hortensia, Ramasimanana, and Julius Valentin, Emmrich
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Rural Population ,Incidence ,Health Policy ,Madagascar ,Public Health, Environmental and Occupational Health ,Humans ,Tuberculosis ,World Health Organization - Abstract
Despite a free TB care policy, access to TB care in rural Madagascar is limited due to a markedly underfunded health care system. The World Health Organization estimated the yearly TB incidence in Madagascar at 238 cases per 100,000 people in 2020; only half of the patients with TB are being notified and treated. We describe the development, implementation, and lessons learned of an intervention to improve TB care services in a remote, rural district in southern Madagascar. We involved national, regional, and local stakeholders in assessing the multifaceted challenges in a remote, rural area and codesigning activities to address them. The overarching principles of the intervention were to (1) promote national TB guidelines, (2) build on best practices, and (3) prioritize low-cost activities to enable scale-up. An in-depth assessment of challenges in accessing and delivering TB care resulted in the following prioritization of activities: (1) fostering community engagement, (2) decentralizing service provision, (3) improving quality of care, (4) providing nutritional support, and (5) ensuring staff support and supervision. The intervention was launched in September 2019 and is ongoing as of October 2022. During mobile TB clinics conducted between September 2019 and December 2020, 4,982 presumptive patients were screened and 1,706 (34.2%) have been diagnosed with TB. Based on 2010-2020 official TB notification data, we calculated trend-adjusted additional TB notifications during the intervention, resulting in a 2.6-fold increase in cases in 2019-2020. The intervention district's TB notification rate increased from 178 cases per 100,000 people in 2018 to 424 cases per 100,000 people in 2020. Involving stakeholders from all levels of care was perceived as a key to success. The unexpected increase in the number of patients with TB in the intervention district overburdened the current paper-based TB notification system and emphasized the need for expanded diagnostics and social support services.
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- 2022
17. Investigation of a COVID-19 outbreak in Germany resulting from a single travel-associated primary case: a case series
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Nadine Zeitlmann, Barbara Mühlemann, Osamah Hamouda, Anja Berger, Siegfried Ippisch, Christian Drosten, Andreas Zapf, Julia Schneider, Nikolaus Ackermann, Regina Konrad, Bianca Treis, Ute Eberle, Stefan Hörmansdorfer, Udo Buchholz, Tom Woudenberg, Martin Hoch, Wei Cai, Stefanie Böhm, Mathias C. Walter, Andreas Sing, Talitha Veith, Victor M. Corman, Alexandra Dangel, Durdica Marosevic, Ulrike Protzer, Andreas Grahl, Volker Fingerle, Nadine Muller, T. Sonia Boender, Roman Wölfel, Walter Haas, Katharina Katz, Bernd Wicklein, Kirsten Pörtner, Markus Antwerpen, Andreas Reich, Katja Bengs, Maria an der Heiden, Bernhard Liebl, Merle M Böhmer, and Ute Rexroth
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0301 basic medicine ,Adult ,medicine.medical_specialty ,Pediatrics ,China ,Isolation (health care) ,Adolescent ,Pneumonia, Viral ,Disease cluster ,Risk Assessment ,Article ,Incubation period ,Disease Outbreaks ,Interviews as Topic ,03 medical and health sciences ,Betacoronavirus ,Young Adult ,0302 clinical medicine ,Communicable Diseases, Imported ,Germany ,Epidemiology ,Disease Transmission, Infectious ,Medicine ,Humans ,030212 general & internal medicine ,Young adult ,Child ,Pandemics ,Travel ,business.industry ,Reverse Transcriptase Polymerase Chain Reaction ,SARS-CoV-2 ,Outbreak ,COVID-19 ,Middle Aged ,030104 developmental biology ,Infectious Diseases ,El Niño ,Child, Preschool ,Mutation ,RNA, Viral ,business ,Coronavirus Infections ,Travel-Related Illness ,Serial interval - Abstract
Summary Background In December, 2019, the newly identified severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) emerged in Wuhan, China, causing COVID-19, a respiratory disease presenting with fever, cough, and often pneumonia. WHO has set the strategic objective to interrupt spread of SARS-CoV-2 worldwide. An outbreak in Bavaria, Germany, starting at the end of January, 2020, provided the opportunity to study transmission events, incubation period, and secondary attack rates. Methods A case was defined as a person with SARS-CoV-2 infection confirmed by RT-PCR. Case interviews were done to describe timing of onset and nature of symptoms and to identify and classify contacts as high risk (had cumulative face-to-face contact with a confirmed case for ≥15 min, direct contact with secretions or body fluids of a patient with confirmed COVID-19, or, in the case of health-care workers, had worked within 2 m of a patient with confirmed COVID-19 without personal protective equipment) or low risk (all other contacts). High-risk contacts were ordered to stay at home in quarantine for 14 days and were actively followed up and monitored for symptoms, and low-risk contacts were tested upon self-reporting of symptoms. We defined fever and cough as specific symptoms, and defined a prodromal phase as the presence of non-specific symptoms for at least 1 day before the onset of specific symptoms. Whole genome sequencing was used to confirm epidemiological links and clarify transmission events where contact histories were ambiguous; integration with epidemiological data enabled precise reconstruction of exposure events and incubation periods. Secondary attack rates were calculated as the number of cases divided by the number of contacts, using Fisher's exact test for the 95% CIs. Findings Patient 0 was a Chinese resident who visited Germany for professional reasons. 16 subsequent cases, often with mild and non-specific symptoms, emerged in four transmission generations. Signature mutations in the viral genome occurred upon foundation of generation 2, as well as in one case pertaining to generation 4. The median incubation period was 4·0 days (IQR 2·3–4·3) and the median serial interval was 4·0 days (3·0–5·0). Transmission events were likely to have occurred presymptomatically for one case (possibly five more), at the day of symptom onset for four cases (possibly five more), and the remainder after the day of symptom onset or unknown. One or two cases resulted from contact with a case during the prodromal phase. Secondary attack rates were 75·0% (95% CI 19·0–99·0; three of four people) among members of a household cluster in common isolation, 10·0% (1·2–32·0; two of 20) among household contacts only together until isolation of the patient, and 5·1% (2·6–8·9; 11 of 217) among non-household, high-risk contacts. Interpretation Although patients in our study presented with predominately mild, non-specific symptoms, infectiousness before or on the day of symptom onset was substantial. Additionally, the incubation period was often very short and false-negative tests occurred. These results suggest that although the outbreak was controlled, successful long-term and global containment of COVID-19 could be difficult to achieve. Funding All authors are employed and all expenses covered by governmental, federal state, or other publicly funded institutions.
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- 2020
18. Outbreak of COVID-19 in Germany Resulting from a Single Travel-Associated Primary Case
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Merle M. Böhmer, Udo Buchholz, Victor M. Corman, Martin Hoch, Katharina Katz, Durdica V. Marosevic, Stefanie Böhm, Tom Woudenberg, Nikolaus Ackermann, Regina Konrad, Ute Eberle, Bianca Treis, Alexandra Dangel, Katja Bengs, Volker Fingerle, Anja Berger, Stefan Hörmansdorfer, Siegfried Ippisch, Bernd Wicklein, Andreas Grahl, Kirsten Pörtner, Nadine Muller, Nadine Zeitlmann, T. Sonia Boender, Wei Cai, Andreas Reich, Maria an der Heiden, Ute Rexroth, Osamah Hamouda, Julia Schneider, Talitha Veith, Barbara Mühlemann, Roman Wölfel, Markus Antwerpen, Mathias Walter, Ulrike Protzer, Bernhard Liebl, Walter Haas, Andreas Sing, Christian Drosten, and Andreas Zapf
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2019-20 coronavirus outbreak ,Coronavirus disease 2019 (COVID-19) ,business.industry ,Transmission (medicine) ,viruses ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,Attack rate ,virus diseases ,Outbreak ,medicine.disease_cause ,Environmental health ,Medicine ,business ,Coronavirus - Abstract
Background: In December 2019, a newly identified coronavirus (SARS-CoV-2) emerged in Wuhan, China, causing respiratory disease (COVID-19) presenting with fever
- Published
- 2020
19. Correction: Real‑world data suggest effectiveness of the allogeneic mesenchymal stromal cells preparation MSC‑FFM in ruxolitinib‑refractory acute graft‑versus‑host disease
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Halvard Bonig, Mareike Verbeek, Peter Herhaus, Krischan Braitsch, Gernot Beutel, Christoph Schmid, Nadine Müller, Gesine Bug, Michaela Döring, Arend von Stackelberg, Johanna Tischer, Francis Ayuk, Gerald Wulf, Udo Holtick, Lisa‑Marie Pfeffermann, Bernd Jahrsdörfer, Hubert Schrezenmeier, Selim Kuci, Zyrafete Kuci, Anke Zens, Michael Tribanek, Robert Zeiser, Sabine Huenecke, and Peter Bader
- Subjects
Medicine - Published
- 2024
- Full Text
- View/download PDF
20. Real-world data suggest effectiveness of the allogeneic mesenchymal stromal cells preparation MSC-FFM in ruxolitinib-refractory acute graft-versus-host disease
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Halvard Bonig, Mareike Verbeek, Peter Herhaus, Krischan Braitsch, Gernot Beutel, Christoph Schmid, Nadine Müller, Gesine Bug, Michaela Döring, Arend von Stackelberg, Johanna Tischer, Francis Ayuk, Gerald Wulf, Udo Holtick, Lisa-Marie Pfeffermann, Bernd Jahrsdörfer, Hubert Schrezenmeier, Selim Kuci, Zyrafete Kuci, Anke Zens, Michael Tribanek, Robert Zeiser, Sabine Huenecke, and Peter Bader
- Subjects
MSC-FFM ,Mesenchymal stromal cells ,Steroid-refractory ,Ruxolitinib-refractory ,Allogeneic haematopoietic stem cell transplantation ,Medicine - Abstract
Abstract Background Patients with steroid-refractory acute graft-versus-host disease (aGvHD) not tolerating/responding to ruxolitinib (RR-aGvHD) have a dismal prognosis. Methods We retrospectively assessed real-world outcomes of RR-aGvHD treated with the random-donor allogeneic MSC preparation MSC-FFM, available via Hospital Exemption in Germany. MSC-FFM is provided as frozen cell dispersion for administration as i.v. infusion immediately after thawing, at a recommended dose of 1–2 million MSCs/kg body weight in 4 once-weekly doses. 156 patients, 33 thereof children, received MSC-FFM; 5% had Grade II, 40% had Grade III, and 54% had Grade IV aGvHD. Median (range) number of prior therapies was 4 (1–10) in adults and 7 (2–11) in children. Results The safety profile of MSC-FFM was consistent with previous reports for MSC therapies in general and MSC-FFM specifically. The overall response rate at Day 28 was 46% (95% confidence interval [CI] 36–55%) in adults and 64% (45–80%) in children; most responses were durable. Probability of overall survival at 6, 12 and 24 months was 47% (38–56%), 35% (27–44%) and 30% (22–39%) for adults, and 59% (40–74%), 42% (24–58%) and 35% (19–53%) for children, respectively (whole cohort: median OS 5.8 months). Conclusion A recent real-world analysis of outcomes for 64 adult RR-aGvHD patients not treated with MSCs reports survival of 20%, 16% and 10% beyond 6, 12 and 24 months, respectively (median 28 days). Our data thus suggest effectiveness of MSC-FFM in RR-aGvHD.
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- 2023
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21. Concomitant MDS with isolated 5q deletion and MGUS: case report and review of molecular aspects
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Daniel Nowak, Florian Nolte, Tobias Boch, Maximilian Mossner, Wolf-Karsten Hofmann, Georgia Metzgeroth, Nadine Muller, and Johann-Christoph Jann
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Male ,0301 basic medicine ,Oncology ,medicine.medical_specialty ,Pathology ,Monoclonal Gammopathy of Undetermined Significance ,03 medical and health sciences ,0302 clinical medicine ,Bone Marrow ,immune system diseases ,hemic and lymphatic diseases ,Internal medicine ,Antineoplastic Combined Chemotherapy Protocols ,medicine ,Humans ,Multiple myeloma ,Dexamethasone ,Aged ,Lenalidomide ,business.industry ,Myelodysplastic syndromes ,Hematology ,General Medicine ,medicine.disease ,Pancytopenia ,Repressor Proteins ,Leukemia, Myeloid, Acute ,030104 developmental biology ,medicine.anatomical_structure ,Myelodysplastic Syndromes ,030220 oncology & carcinogenesis ,Concomitant ,Mutation ,Disease Progression ,Chromosomes, Human, Pair 5 ,Bone marrow ,Chromosome Deletion ,business ,Monoclonal gammopathy of undetermined significance ,medicine.drug - Abstract
Patients with monoclonal gammopathy of undetermined significance (MGUS) have a higher risk for the development of concomitant primary cancers such as multiple myeloma (MM) and myelodysplastic syndrome (MDS). We report the case of patient initially suffering from MGUS of the IgG lambda subtype for more than 10 yr, which evolved to MM and MDS with deletion (5q) with severe pancytopenia. Due to pancytopenia, he received dose-reduced treatment with lenalidomide and dexamethasone. He achieved an ongoing transfusion independency after about 1 month of treatment. Bone marrow taken 14 months after start of treatment showed a complete cytogenetic response of the del(5q) clone and a plasma cell infiltration below 5%. In contrast to the development of MM in MGUS patients, the subsequent occurrence of MDS after diagnosis of MGUS is infrequent. Moreover, the biological association of MDS with MGUS is not sufficiently understood, but the non-treatment-related occurrence supports the pathogenetic role of pre-existing alterations of stem cells. Here, we summarize data on concomitant MDS and MGUS/MM with particular emphasis on molecular aspects.
- Published
- 2016
22. Facilitators and barriers to the implementation of a Mobile Health Wallet for pregnancy-related health care: A qualitative study of stakeholders' perceptions in Madagascar
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Nadine Muller, Shannon A McMahon, Jan-Walter De Neve, Alexej Funke, Till Bärnighausen, Elsa N Rajemison, Etienne Lacroze, Julius V Emmrich, and Samuel Knauss
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Adult ,Economics ,Science ,Health Personnel ,Health Care Providers ,Maternal Health ,Social Sciences ,Equipment ,Pilot Projects ,Health Services Accessibility ,Geographical Locations ,Health Economics ,Pregnancy ,Madagascar ,Medicine and Health Sciences ,Humans ,Maternal Health Services ,Qualitative Research ,Quality of Health Care ,Communication Equipment ,Health Services Needs and Demand ,Motivation ,Obstetrics and Gynecology ,mobile health wallet (MHW) ,Telemedicine ,Health Care ,Health Care Facilities ,People and Places ,Africa ,Medicine ,Women's Health ,Engineering and Technology ,Female ,Pregnant Women ,Cell Phones ,600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit ,Cell Phone ,Finance ,Research Article - Abstract
Financial barriers are a major obstacle to accessing maternal health care services in low-resource settings. In Madagascar, less than half of live births are attended by skilled health staff. Although mobile money-based savings and payment systems are often used to pay for a variety of services, including health care, data on the implications of a dedicated mobile money wallet restricted to health-related spending during pregnancy-a mobile health wallet (MHW)-are not well understood. In cooperation with the Madagascan Ministry of Health, this study aims to elicit the perceptions, experiences, and recommendations of key stakeholders in relation to a MHW amid a pilot study in 31 state-funded health care facilities. We conducted a two-stage qualitative study using semi-structured in-depth interviews with stakeholders (N = 21) representing the following groups: community representatives, health care providers, health officials and representatives from phone provider companies. Interviews were conducted in Atsimondrano and Renivohitra districts, between November and December of 2017. Data was coded thematically using inductive and deductive approaches, and found to align with a social ecological model. Key facilitators for successful implementation of the MHW, include (i) close collaboration with existing communal structures and (ii) creation of an incentive scheme to reward pregnant women to save. Key barriers to the application of the MHW in the study zone include (i) disruption of informal benefits for health care providers related to the current cash-based payment system, (ii) low mobile phone ownership, (iii) illiteracy among the target population, and (iv) failure of the MHW to overcome essential access barriers towards institutional health care services such as fear of unpredictable expenses. The MHW was perceived as a potential solution to reduce disparities in access to maternal health care. To ensure success of the MHW, direct demand-side and provider-side financial incentives merit consideration.
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- 2019
23. Metadata Correction: A Mobile Health Wallet for Pregnancy-Related Health Care in Madagascar: Mixed-Methods Study on Opportunities and Challenges
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Nadine Muller, Samuel Knauss, Peter M. F. Emmrich, Till Bärnighausen, Jan-Walter De Neve, Elsa Niritiana Rajemison, and Julius V. Emmrich
- Subjects
Adult ,Adolescent ,Health Informatics ,Information technology ,Health Services Accessibility ,Nursing ,Pregnancy ,Surveys and Questionnaires ,Health care ,Madagascar ,medicine ,Healthcare Financing ,Humans ,Maternal Health Services ,Qualitative Research ,business.industry ,Focus Groups ,Middle Aged ,medicine.disease ,T58.5-58.64 ,Corrigenda and Addenda ,Telemedicine ,Metadata ,Female ,Public aspects of medicine ,RA1-1270 ,business ,Cell Phone - Abstract
Mobile savings and payment systems have been widely adopted to store money and pay for a variety of services, including health care. However, the possible implications of these technologies on financing and payment for maternal health care services-which commonly require large 1-time out-of-pocket payments-have not yet been systematically assessed in low-resource settings.The aim of this study was to determine the structural, contextual, and experiential characteristics of a mobile phone-based savings and payment platform, the Mobile Health Wallet (MHW), for skilled health care during pregnancy among women in Madagascar.We used a 2-stage cluster random sampling scheme to select a representative sample of women utilizing either routine antenatal (ANC) or routine postnatal care (PNC) in public sector health facilities in 2 of 8 urban and peri-urban districts of Antananarivo, Madagascar (Atsimondrano and Renivohitra districts). In a quantitative structured survey among 412 randomly selected women attending ANC or PNC, we identified saving habits, mobile phone use, media consumptions, and perception of an MHW with both savings and payment functions. To confirm and explain the quantitative results, we used qualitative data from 6 semistructured focus group discussions (24 participants in total) in the same population.59.3% (243/410, 95% CI 54.5-64.1) saved toward the expected costs of delivery and, out of those, 64.4% (159/247, 95% CI 58.6-70.2) used household cash savings for this purpose. A total of 80.3% (331/412, 95% CI 76.5-84.1) had access to a personal or family phone and 35.7% (147/412, 95% CI 31.1-40.3) previously used Mobile Money services. Access to skilled health care during pregnancy was primarily limited because of financial obstacles such as saving difficulties or unpredictability of costs. Another key barrier was the lack of information about health benefits or availability of services. The general concept of an MHW for saving toward and payment of pregnancy-related care, including the restriction of payments, was perceived as beneficial and practicable by the majority of participants. In the discussions, several themes pointed to opportunities for ensuring the success of an MHW through design features: (1) intuitive technical ease of use, (2) clear communication and information about benefits and restrictions, and (3) availability of personal customer support.Financial obstacles are a major cause of limited access to skilled maternal health care in Madagascar. An MHW for skilled health care during pregnancy was perceived as a useful and desirable tool to reduce financial barriers among women in urban Madagascar. The design of this tool and the communication strategy will likely be the key to success. Particularly important dimensions of design include technical user friendliness and accessible and personal customer service.
- Published
- 2019
24. Metadata Correction: A Mobile Health Wallet for Pregnancy-Related Health Care in Madagascar: Mixed-Methods Study on Opportunities and Challenges (Preprint)
- Author
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Nadine Muller, Peter Martin Ferdinand Emmrich, Elsa Niritiana Rajemison, Jan-Walter De Neve, Till Bärnighausen, Samuel Knauss, and Julius Valentin Emmrich
- Published
- 2019
25. A Mobile Health Wallet for Pregnancy-Related Health Care in Madagascar: Mixed-Methods Study on Opportunities and Challenges (Preprint)
- Author
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Nadine Muller, Peter Martin Ferdinand Emmrich, Elsa Niritiana Rajemison, Jan-Walter De Neve, Till Bärnighausen, Samuel Knauss, and Julius Valentin Emmrich
- Abstract
BACKGROUND Mobile savings and payment systems have been widely adopted to store money and pay for a variety of services, including health care. However, the possible implications of these technologies on financing and payment for maternal health care services—which commonly require large 1-time out-of-pocket payments—have not yet been systematically assessed in low-resource settings. OBJECTIVE The aim of this study was to determine the structural, contextual, and experiential characteristics of a mobile phone–based savings and payment platform, the Mobile Health Wallet (MHW), for skilled health care during pregnancy among women in Madagascar. METHODS We used a 2-stage cluster random sampling scheme to select a representative sample of women utilizing either routine antenatal (ANC) or routine postnatal care (PNC) in public sector health facilities in 2 of 8 urban and peri-urban districts of Antananarivo, Madagascar (Atsimondrano and Renivohitra districts). In a quantitative structured survey among 412 randomly selected women attending ANC or PNC, we identified saving habits, mobile phone use, media consumptions, and perception of an MHW with both savings and payment functions. To confirm and explain the quantitative results, we used qualitative data from 6 semistructured focus group discussions (24 participants in total) in the same population. RESULTS 59.3% (243/410, 95% CI 54.5-64.1) saved toward the expected costs of delivery and, out of those, 64.4% (159/247, 95% CI 58.6-70.2) used household cash savings for this purpose. A total of 80.3% (331/412, 95% CI 76.5-84.1) had access to a personal or family phone and 35.7% (147/412, 95% CI 31.1-40.3) previously used Mobile Money services. Access to skilled health care during pregnancy was primarily limited because of financial obstacles such as saving difficulties or unpredictability of costs. Another key barrier was the lack of information about health benefits or availability of services. The general concept of an MHW for saving toward and payment of pregnancy-related care, including the restriction of payments, was perceived as beneficial and practicable by the majority of participants. In the discussions, several themes pointed to opportunities for ensuring the success of an MHW through design features: (1) intuitive technical ease of use, (2) clear communication and information about benefits and restrictions, and (3) availability of personal customer support. CONCLUSIONS Financial obstacles are a major cause of limited access to skilled maternal health care in Madagascar. An MHW for skilled health care during pregnancy was perceived as a useful and desirable tool to reduce financial barriers among women in urban Madagascar. The design of this tool and the communication strategy will likely be the key to success. Particularly important dimensions of design include technical user friendliness and accessible and personal customer service.
- Published
- 2018
26. Course of colonization by multidrug-resistant organisms after allogeneic hematopoietic cell transplantation
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Florian Nolte, W.-K. Hofmann, Thomas Miethke, Mohamad Jawhar, K-P. Becker, Sebastian Kreil, Stefan Klein, Nadine Muller, and Daniela Heidenreich
- Subjects
Adult ,Male ,Methicillin-Resistant Staphylococcus aureus ,medicine.medical_specialty ,medicine.drug_class ,Antibiotics ,Pneumocystis carinii ,03 medical and health sciences ,0302 clinical medicine ,Risk Factors ,hemic and lymphatic diseases ,Internal medicine ,Drug Resistance, Multiple, Bacterial ,Drug Resistance, Multiple, Fungal ,medicine ,Humans ,Colonization ,030212 general & internal medicine ,Aged ,Retrospective Studies ,Hematology ,Hematopoietic cell ,Potential risk ,business.industry ,Hematopoietic Stem Cell Transplantation ,General Medicine ,Middle Aged ,Staphylococcal Infections ,Allografts ,Multiple drug resistance ,Transplantation ,Pneumocystis Infections ,030220 oncology & carcinogenesis ,Female ,business ,Clearance - Abstract
Multidrug-resistant organisms (MDRO) have been developing as an emerging problem in allogeneic hematopoietic cell transplantation (HCT). Since no data are available on the course of MDRO colonization after HCT, we investigated in this retrospective, single-center study, persistence and clearance of MDRO after HCT. From June 2010 to December 2015, 121 consecutive HCT patients were included. Patients received a MDRO screening before conditioning as well as surveillance cultures after HCT. In MDRO-colonized patients, surveillance specimens were taken until MDRO were no longer detectable. Thirty-three patients (27%) were found to be colonized by at least one MDRO at any time point until day 100 post HCT. Day 100 (2-year) non-relapse mortality (NRM) and overall survival (OS) of MDRO-colonized (MDRO+) versus non-colonized (MDRO−) patients were essentially the same. NRM is 15% (21%) versus 15% (24%). Two-year OS is 60 versus 55% for MDRO+ versus MDRO− patients. Out of the 33 MDRO+ patients, 21 cleared the MDRO. Median time to non-detectability of MDRO was 6 months. In 12 patients, the MDRO persisted. There was a significant (p
- Published
- 2018
27. Introduction: The Male Body in Victorian Literature & Culture
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Joanne Ella Parsons and Nadine Muller
- Subjects
Cultural Studies ,History ,Literature and Literary Theory ,Gender studies ,Victorian literature ,Period (music) - Abstract
There exists a considerable amount of research focused on the female body in the Victorian period, from texts such as Krugovoy Silver's exploration of anorexic female bodies to Talairach-Vielmas's ...
- Published
- 2014
28. Myelodysplastic Cells in Patients Reprogram Mesenchymal Stromal Cells to Establish a Transplantable Stem Cell Niche Disease Unit
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Julia Obländer, Bettina Zens, Verena Nowak, Alexander Kohlmann, Simon Raffel, Florian Nolte, Hind Medyouf, Marita Staller, Eva Riedl, Nadine Muller, Maximilian Mossner, Thilo John, Daniel Nowak, Stephanie Fey, Katja Müdder, Jovita Vogler, Carl Herrmann, Johann Christoph Jann, Georgia Metzgeroth, Alice Fabarius, Corinna Klein, Wolf-Karsten Hofmann, Henning Roehl, Amelie Lier, Christian Eisen, Andreas Trumpp, Claudia Haferlach, and Uwe Platzbecker
- Subjects
Myeloid ,Stromal cell ,CD34 ,Mice, SCID ,Biology ,Mice ,Mice, Inbred NOD ,hemic and lymphatic diseases ,medicine ,Genetics ,Animals ,Humans ,Progenitor cell ,Stem Cell Niche ,Aged ,Mice, Knockout ,Myelodysplastic syndromes ,Mesenchymal stem cell ,Mesenchymal Stem Cells ,Cell Biology ,medicine.disease ,Haematopoiesis ,medicine.anatomical_structure ,Myelodysplastic Syndromes ,Immunology ,Cancer research ,Molecular Medicine ,Stem cell - Abstract
SummaryMyelodysplastic syndromes (MDSs) are a heterogeneous group of myeloid neoplasms with defects in hematopoietic stem and progenitor cells (HSPCs) and possibly the HSPC niche. Here, we show that patient-derived mesenchymal stromal cells (MDS MSCs) display a disturbed differentiation program and are essential for the propagation of MDS-initiating Lin−CD34+CD38− stem cells in orthotopic xenografts. Overproduction of niche factors such as CDH2 (N-Cadherin), IGFBP2, VEGFA, and LIF is associated with the ability of MDS MSCs to enhance MDS expansion. These factors represent putative therapeutic targets in order to disrupt critical hematopoietic-stromal interactions in MDS. Finally, healthy MSCs adopt MDS MSC-like molecular features when exposed to hematopoietic MDS cells, indicative of an instructive remodeling of the microenvironment. Therefore, this patient-derived xenograft model provides functional and molecular evidence that MDS is a complex disease that involves both the hematopoietic and stromal compartments. The resulting deregulated expression of niche factors may well also be a feature of other hematopoietic malignancies.
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- 2014
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29. Magnetic Annealing on GNO Electrical Steel Fe-3.25% Si
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G.A. Castello-Branco, C.M.B. Bacaltchuk, and Jennifer Nadine Muller
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Magnetic annealing ,Materials science ,Annealing (metallurgy) ,Mechanical Engineering ,Metallurgy ,engineering.material ,Condensed Matter Physics ,Microstructure ,Grain size ,Magnetic field ,Grain growth ,Mechanics of Materials ,engineering ,General Materials Science ,Electrical steel - Abstract
Grain non-oriented electrical steel has its main application in electrical motors and its microstructure significantly influences their efficiency. The objective of this work was to investigate whether or not magnetic field applied during annealing process affects grain growth and the development of important texture components leading to an improvement of the magnetic properties. GNO Fe-3.25%Si 75% cold rolled specimens were annealed inside magnetic field with strength of 17 T at the temperature of 800°C for 3, 10 and 30 minutes. Results of average grain size after magnetic annealing showed a microstructure formed by small grains and a few very large grains. Magnetic field did not increase orientation density of {100} oriented grains and Goss grains but was able to increase density of θ fiber and decrease the density of γ fiber.
- Published
- 2013
30. Dead Husbands and Deviant Women: Investigating the Detective Widow in Neo-Victorian Crime Fiction
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Nadine Muller
- Subjects
Literature ,Etiquette ,History ,business.industry ,General Chemical Engineering ,media_common.quotation_subject ,Reading (process) ,Character (symbol) ,business ,Femininity ,media_common - Abstract
Over the past decade, the detective widow has become a well-established character in the little-explored subgenre of neo-Victorian crime fiction. In Tasha Alexander's Lady Emily series, the author argues, the detective widow investigates the gendered characteristics and com- plexities of Victorian widowhood while detecting the artistic crimes associated with historical fiction's imitations and adaptations of the past. In outlining the scope of the academic journal Neo-Victorian Studies, Marie-Luise Kohlke describes neo-Victorianism as "the contemporary fascination with reimagining the nineteenth century and its varied literary, artistic, socio-political and historical contexts"; this fascination is "perhaps most evident in the proliferation of so-called neo-Victorian novels" ("Aims and Scopes"). Fictional revisitings of the nineteenth century by authors such as A. S. Byatt, Michel Faber, Amitav Ghosh, and Sarah Waters have topped bestseller lists and have begun to form part of a neo-Victorian canon that, since the turn of the new millennium, has begun to receive significant critical attention. 1 Despite this burgeoning aca- demic interest in literary manifestations of the neo-Victorian, however, critics have largely neglected neo-Victorian crime fiction. 2 This essay considers the significance of one partic- ularly striking feature of recent examples in the subgenre: the figure of the detective widow. A dilettante sleuth, this character strives to break, or at least occasionally transgress, the boundaries of respectable femininity, not only through her investigative association with the crimes of others but also through her own deviant (if not criminal) intellectual pur- suits (usually in the form of certain reading and/or writing activities) as well as her partial disregard for mourning customs and other matters of social etiquette. This figure, who usu
- Published
- 2012
31. Feminisms, sex and the body
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Nadine Muller and Mark Llewellyn
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Gender Studies ,Arts and Humanities (miscellaneous) ,Anthropology ,education ,Gender studies ,Sociology ,health care economics and organizations ,humanities ,Social Sciences (miscellaneous) ,Feminism - Abstract
This is an introduction for the Journal of Gender Studies discussing the feminisms, sex and the body debate.
- Published
- 2011
32. Combining information regarding chromosomal aberrations t(4;14) and del(17p13) with the International Staging System classification allows stratification of myeloma patients undergoing autologous stem cell transplantation
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Uta Bertsch, Hartmut Goldschmidt, Anthony D. Ho, Dirk Hose, Jens Hillengass, Anja Seckinger, Kai Neben, Thomas Hielscher, Marc S. Raab, Nadine Muller, Tina Mors, Anna Jauch, and Christiane Heiss
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Adult ,Male ,Oncology ,medicine.medical_specialty ,Pathology ,medicine.medical_treatment ,Hematopoietic stem cell transplantation ,Biology ,Risk Assessment ,Transplantation, Autologous ,Translocation, Genetic ,Autologous stem-cell transplantation ,Internal medicine ,medicine ,Humans ,Multiple myeloma ,Neoplasm Staging ,Chromosome Aberrations ,Hematology ,medicine.diagnostic_test ,Hazard ratio ,Hematopoietic Stem Cell Transplantation ,Cancer ,Middle Aged ,Prognosis ,medicine.disease ,Transplantation ,Original Article ,Female ,Chromosome Deletion ,Multiple Myeloma ,Fluorescence in situ hybridization - Abstract
Chromosomal abnormalities have been shown to play a major role in disease evolution of multiple myeloma. Specific changes in interphase cells can be detected by fluorescent in situ hybridization, which overcomes the problem of the lack of dividing cells required for conventional cytogenetics.We analyzed the prognostic value of 12 frequent chromosomal abnormalities detected by fluorescent in situ hybridization in a series of patients (n=315) with newly diagnosed, symptomatic multiple myeloma. All patients underwent frontline autologous stem cell transplantation according to the GMMG-HD3- or GMMG-HD4-trial protocols or analogous protocols.Univariate statistical analyses revealed that the presence of del(13q14), del(17p13), t(4;14), +1q21 and non-hyperdiploidy was associated with adverse progression-free and overall survival rates independently of the International Staging System (ISS) classification. Multivariate analyses showed that only t(4;14) and del(17p13) retained prognostic value for both progression-free and overall survival. According to the presence or absence of t(4;14) and del(17p13) and the patients' International Staging System classification, the cohort could be stratified into three distinct groups: a group with a favorable prognosis [absence of t(4;14)/del(17p13) and ISS I], a group with a poor prognosis [presence of t(4;14)/del(17p13) and ISS II/III] and a group with an intermediate prognosis (all remaining patients). The probabilities of overall survival at 5 years decreased from 72% in the favorable prognostic group to 62% (hazard ratio 2.4; P=0.01) in the intermediate and 41% (hazard ratio 5.6; P0.001) in the poor prognostic groups.These results have implications for risk-adapted management for patients with multiple myeloma undergoing high-dose chemotherapy followed by autologous stem cell transplantation and suggest that new treatment concepts are urgently needed for patients who belong to the poor prognosis group. As targeted therapies evolve, different treatment options might have variable success, depending on the underlying genetic nature of the clone.
- Published
- 2010
33. Selective ablation of P53 in pancreatic beta cells fails to ameliorate glucose metabolism in genetic, dietary and pharmacological models of diabetes mellitus
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Celina Uhlemeyer, Nadine Müller, Michael Rieck, Jennifer Kuboth, Caroline Schlegel, Kerstin Grieß, Tim Florian Dorweiler, Sonja Heiduschka, Jürgen Eckel, Michael Roden, Eckhard Lammert, Markus Stoffel, and Bengt-Frederik Belgardt
- Subjects
Pancreatic beta cell ,Apoptosis ,Type 1 diabetes ,Type 2 diabetes ,Internal medicine ,RC31-1245 - Abstract
Objective: Beta cell dysfunction and death are critical steps in the development of both type 1 and type 2 diabetes (T1D and T2D), but the underlying mechanisms are incompletely understood. Activation of the essential tumor suppressor and transcription factor P53 (also known as TP53 and Trp53 in mice) was linked to beta cell death in vitro and has been reported in several diabetes mouse models and beta cells of humans with T2D. In this article, we set out to determine the beta cell specific role of P53 in beta cell dysfunction, cell death and development of diabetes in vivo. Methods: We generated beta cell specific P53 knockout (P53BKO) mice and used complementary genetic, dietary and pharmacological models of glucose intolerance, beta cell dysfunction and diabetes development to evaluate the functional role of P53 selectively in beta cells. We further analyzed the effect of P53 ablation on beta cell survival in isolated pancreatic islets exposed to diabetogenic stress inducers ex vivo by flow cytometry. Results: Beta cell specific ablation of P53/Trp53 failed to ameliorate glucose tolerance, insulin secretion or to increase beta cell numbers in genetic, dietary and pharmacological models of diabetes. Additionally, loss of P53 in beta cells did not protect against streptozotocin (STZ) induced hyperglycemia and beta cell death, although STZ-induced activation of classical pro-apoptotic P53 target genes was significantly reduced in P53BKO mice. In contrast, Olaparib mediated PARP1 inhibition protected against acute ex vivo STZ-induced beta cell death and islet destruction. Conclusions: Our study reveals that ablation of P53 specifically in beta cells is unexpectedly unable to attenuate beta cell failure and death in vivo and ex vivo. While during development and progression of diabetes, P53 and P53-regulated pathways are activated, our study suggests that P53 signaling is not essential for loss of beta cells or beta cell dysfunction. P53 in other cell types and organs may predominantly regulate systemic glucose homeostasis.
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- 2023
- Full Text
- View/download PDF
34. Molecular profiling of myeloid progenitor cells in multi-mutated advanced systemic mastocytosis identifies KIT D816V as a distinct and late event
- Author
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Alice Fabarius, Nicole Naumann, Torsten Haferlach, Andreas Reiter, Karl Sotlar, Peter Valent, Juliana Schwaab, Nicholas C.P. Cross, Nadine Muller, Christoph Walz, Wolf-Karsten Hofmann, Hans-Peter Horny, Susanne Schnittger, Sven Schneider, Georgia Metzgeroth, and Mohamad Jawhar
- Subjects
Neuroblastoma RAS viral oncogene homolog ,Male ,Candidate gene ,Cancer Research ,Myeloid ,DNA Mutational Analysis ,Cell Separation ,Biochemistry ,Somatic evolution in cancer ,Granulocyte-Macrophage Progenitor Cells ,Neoplasm ,Mast Cells ,Systemic mastocytosis ,In Situ Hybridization, Fluorescence ,Hematology ,Serine-Arginine Splicing Factors ,Stem Cells ,Nuclear Proteins ,Middle Aged ,Flow Cytometry ,Prognosis ,Phenotype ,DNA-Binding Proteins ,Leukemia ,Haematopoiesis ,Proto-Oncogene Proteins c-kit ,medicine.anatomical_structure ,Oncology ,Ribonucleoproteins ,Female ,medicine.medical_specialty ,Genotype ,Immunology ,Biology ,Dioxygenases ,Cytogenetics ,Mastocytosis, Systemic ,Internal medicine ,Proto-Oncogene Proteins ,medicine ,Humans ,Cell Lineage ,Progenitor cell ,Aged ,Cell Biology ,medicine.disease ,Molecular biology ,Lymphoma ,Repressor Proteins ,Mutation ,Bone marrow - Abstract
Systemic mastocytosis (SM) is characterized by abnormal proliferation and accumulation of mast cells (MC) in various tissues and organs, predominantly skin, bone marrow (BM) and visceral organs. The extent of organ infiltration and subsequent organ damage is the basis for the classification of SM into indolent SM (ISM), smoldering SM (SSM), SM with associated clonal hematologic non-MC lineage disease (SM-AHNMD), aggressive SM (ASM) and MC leukemia (MCL). Depending on the subtype of SM, cell source (BM or peripheral blood) and assay sensitivity, an acquired mutation in the receptor tyrosine kinase KIT, usually KIT D816V, is detectable in 80-90% of patients. Next-Generation Deep Amplicon Sequencing (NGS) was performed to investigate 18 candidate genes at known mutational hotspot regions as previously described. Additional mutations in genes encoding for signaling molecules (JAK2, CBL, KRAS, NRAS), transcription factors (RUNX1), epigenetic regulators (ASXL1, DNMT3A, EZH2, TET2) or splicing factors (SRSF2, SF3B1, U2AF1) are detectable in the vast majority of patients KIT D816V+ advanced SM. In order to gain more insight into clonal evolution of myeloid progenitors in indolent and advanced SM with or without AHNMD, we explored the mutation profile of single-cell-derived CFU-GM colonies - by using Sanger sequencing - in 19 KIT D816V+ SM patients (investigated colonies, n=285; median per patient, n=15; range 10-30). The study included 7 patients with ISM/SSM/ASM (0 additional mutations), 4 patients with SM-AHNMD (median 1 additional mutation, range 1-4) and 8 patients with ASM-AHNMD (median 3 additional mutations, range 1-4). KIT D816V+ CFU-GM could be identified in all 8 patients with ASM ± AHNMD but in only 20% (1/5) of patients with SM-AHNMD, while all CFU-GM colonies derived from ISM patients were completely KIT D816V negative. On the other hand, CFU-GM colonies from individual ASM ± AHNMD patients were never entirely KIT D816V+ (median 60%, range 0-95). In contrast to KIT D816V, additional mutations were identified in CFU-GM colonies from all 12 multi-mutated (A)SM-AHNMD patients and many of these mutations were present in 100% of the CFU-GM-derived colonies analyzed. In 8 patients, different subclones with variable proportions of the number of mutated genes were identified and allowed to generate putative evolutionary trees. These mutations included TET2 and SRSF2 mutations in 6/6 and 4/4 patients with (A)SM-AHNMD. In contrast, ASXL1 mutations were not identified in all TET2/SRSF2 positive CFU-GM colonies suggesting that they are likely to occur later than TET2 and SRSF2. When additional mutations and KIT D816V were detected concomitantly in individual single-cell-derived CFU-GM colonies, the overall frequency of CFU-GM colonies positive for additional mutations was always higher than those that were KIT D816V positive, indicating that the KIT D816V mutation was a secondary event. In contrast to advanced SM, all ISM patients were negative for additional mutations. CFU-GM colonies and also microdissected CD15+ cells derived from BM biopsies were entirely KIT D816V negative in these patients, highlighting that the KIT D816V mutation may be restricted to other (probably later) stages of stem cell development and possibly only to the MC lineage. In general, the relative proportion of KIT D816V+ progenitors correlated well with established parameters for quantification of disease burden, e.g. BM MC infiltration, serum tryptase levels and KIT D816V allele burden in individual patients. In conclusion, the presence of multi-mutated myeloid non-MC lineage progenitors of the CFU-GM-type suggests an initial clonal expansion at an early stage of hematopoietic development due to mutations other than KIT D816V with a subsequent phenotype modification towards SM due to a later acquisition of KIT D816V. In contrast, ISM/SSM is not affected by mutations at the CFU-GM level which may at least in part explain its excellent prognosis. Disclosures Schnittger: MLL Munich Leukemia Laboratory: Other. Horny:Novartis: Consultancy, Honoraria. Haferlach:MLL: Equity Ownership. Valent:Novartis: Consultancy. Reiter:Novartis: Consultancy, Honoraria.
- Published
- 2014
35. Synthesis of pyrimidinones by action of benzamidine on a benzocycloheptenic β-keto ester
- Author
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Robert Granet, Pierre Krausz, Nadine Muller, Lucette Lepage, and J. P. Laval
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chemistry.chemical_compound ,Pyrimidinones ,chemistry ,Organic Chemistry ,Condensation ,Closure (topology) ,Ring (chemistry) ,Medicinal chemistry ,Benzamidine - Abstract
The synthesis of a polycyclic heterocyclic ring system compound, ethyl 7-hydroxy-4-oxo-2-phenyl-4,5-dihydro-3H-benzo[6,7]cyclohepta[1,2-d]pyrimidine-6-carboxylate was carried out by condensation of benzamidine on diethyl 5,9-dihydroxy-7H-benzo[a]cycloheptene-6,8-dicarboxylate, after opening and then closure of the seven membered ring.
- Published
- 2001
36. Postfeminism and Genre
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Joel Gwynne and Nadine Muller
- Published
- 2013
37. Sexual f(r)ictions
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Nadine Muller
- Published
- 2013
38. Postfeminism and Contemporary Hollywood Cinema
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Nadine Muller and Joel Gwynne
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Hollywood ,business.industry ,media_common.quotation_subject ,Hypermasculinity ,Gender studies ,Art ,Comedy ,Romance ,Femininity ,Movie theater ,Masculinity ,HERO ,business ,media_common - Abstract
Introduction: Postfeminism and Contemporary Hollywood Cinema Joel Gwynne and Nadine Muller PART I: POSTFEMINIST FEMININITIES 1. Neo-Feminism In-Between: Female Cosmopolitan Subjects in Contemporary American Film Ana Moya 2. Querying Postfeminism in Lisa Cholodenko's The Kids Are All Right Clara Bradbury-Rance 3. The Slut that Wasn't: Virginity, (Post)Feminism and Representation in Easy A Katherine Farrimond 4. The Girls of Zeta: Sororities, Ideal Femininity and the Makeover Paradigm in The House Bunny Joel Gwynne 5. Ageing Appropriately: Postfeminist Discourses of Ageing in Contemporary Hollywood Imelda Whelehan PART II: POSTFEMINIST MASCULINITIES 6. 'Chuck Flick': A Genealogy of the Postfeminist Male Singleton Benjamin A. Brabon 7. The Chick's 'New Hero': (Re)Constructing Masculinity in the Postfeminist 'Chick Flick' Amy Burns 8. Hollywood Fatherhood: Paternal Postfeminism in Contemporary Popular Cinema Hannah Hamad 9. Mancaves and Cushions: Marking Masculine and Feminine Domestic Space in Postfeminist Romantic Comedy Lauren Jade Thompson 10. 'We're not making forward progress': Postfeminist Hypermasculinity in Heat Vincent M. Gaine PART III: POSTFEMINISM AND GENRE 11. Towards a New Sexual Conservatism in Postfeminist Romantic Comedy Alexia Bowler 12. Hell is a Teenage Girl? Postfeminism and Contemporary Teen Horror Martin Fradley 13. 'A New Feminist Revolution in Hollywood Comedy'?: Postfeminist Discourses and the Critical Reception of Bridesmaids Helen Warner 14. Blood, Sweat and Tears: Women, Sport and Hollywood Katharina Lindner
- Published
- 2013
39. Sexual f(r)ictions: Pornography in neo-Victorian women’s fiction
- Author
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Nadine Muller
- Subjects
Sexualization ,Politics ,History ,Modernity ,media_common.quotation_subject ,Phenomenon ,Pornography ,Human sexuality ,Gender studies ,Social progress ,Order (virtue) ,media_common - Abstract
Since the first decades of the twentieth century and the publication of Lytton Strachey’s Eminent Victorians (1918), through to the 1960s and Steven Marcus’s The Other Victorians: A Study of Sexuality and Pornography in Mid-Nineteenth-Century Victorian England (1964), the nineteenth century has been (re)defined according to its sexual politics, not least in order to contrast perceived Victorian conservativeness with later generations’ sense of their own modernity. At the turn of the new millennium, neo-Victorian fiction, through its compulsive return to matters of sex and gender, continues this sexualization of the past, a phenomenon which Marie-Luise Kohlke has termed the ‘neo-Victorian sexsation’, and which, as in previous decades, still frequently serves to ‘conveniently reassert our own supposedly enlightened stance towards sexuality and social progress’ by sexually ‘liberating’ the past and its fictional heroines.1
- Published
- 2012
40. ChemInform Abstract: Synthesis of Pyrimidinones by Action of Benzamidine on a Benzocycloheptenic β-Keto Ester
- Author
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Pierre Krausz, Robert Granet, Nadine Muller, J. P. Laval, and Lucette Lepage
- Subjects
chemistry.chemical_compound ,Pyrimidinones ,chemistry ,Stereochemistry ,General Medicine ,Ring (chemistry) ,Benzamidine - Abstract
The synthesis of a polycyclic heterocyclic ring system compound, ethyl 7-hydroxy-4-oxo-2-phenyl-4,5-dihydro-3H-benzo[6,7]cyclohepta[1,2-d]pyrimidine-6-carboxylate was carried out by condensation of benzamidine on diethyl 5,9-dihydroxy-7H-benzo[a]cycloheptene-6,8-dicarboxylate, after opening and then closure of the seven membered ring.
- Published
- 2010
41. The soluble transferrin receptor (TfR)-F-Index is not applicable as a test for iron status in patients with chronic lymphocytic leukemia
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Melanie Kripp, Karin Bonatz, Beate Schultheis, Nadine Muller, Christoph Walz, Georgia Metzgeroth, Jan Hastka, and Alexandra Dorn-Beineke
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Adult ,Male ,medicine.medical_specialty ,Iron ,Chronic lymphocytic leukemia ,Clinical Biochemistry ,Transferrin receptor ,Gastroenterology ,Internal medicine ,Receptors, Transferrin ,Humans ,Medicine ,In patient ,Aged ,Soluble transferrin receptor ,Aged, 80 and over ,biology ,business.industry ,Biochemistry (medical) ,Cancer ,General Medicine ,Iron deficiency ,Middle Aged ,medicine.disease ,Leukemia, Lymphocytic, Chronic, B-Cell ,Tumor Burden ,Ferritin ,Leukemia ,C-Reactive Protein ,Solubility ,Ferritins ,Immunology ,biology.protein ,Female ,business - Abstract
Background: The soluble transferrin receptor (sTfR) is established as a test for iron deficiency (ID). In chronic lymphocytic leukemia (CLL), sTfR is not reliable for screening for ID as the latter is strongly dependent on tumor burden. Methods: We investigated whether the influence of the tumor load can be excluded or minimized using the sTfR/log ferritin ratio (TfR-F-Index) and the C-reactive protein (CRP)-adjusted TfR-F-Index in 87 patients with CLL. sTfR was measured nephelometrically (normal: 0.81–1.75 mg/L). A cut-off value of 1.5 for the TfR-F-Index and 0.8 for the CRP-adjusted TfR-F-Index, in patients with a CRP >5 mg/L, was used. Results: All Binet A patients had normal sTfR values (1.34±0.2 mg/L), TfR-F-Index (0.67±0.2) and a CRP-adjusted TfR-F-Index. In Binet B and C, sTfR and the TfR-F-Index were significantly increased compared to Binet A patients (p
- Published
- 2009
42. Transforming Memories in Contemporary Women's Rewriting
- Author
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Nadine Muller
- Subjects
Gender Studies ,Literature and Literary Theory ,Gender studies ,Rewriting ,Sociology - Published
- 2012
43. The Elephant in the Room: A Systematic Review of Stimulus Control in Neuro-Measurement Studies on Figurative Language Processing
- Author
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Sina Koller, Nadine Müller, and Christina Kauschke
- Subjects
review ,stimulus control ,neuro-imaging ,neurolinguistics ,figurative language ,idiom ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
The processing of metaphors and idioms has been the subject of neuroscientific research for several decades. However, results are often contradictory, which can be traced back to inconsistent terminology and stimulus control. In this systematic review of research methods, we analyse linguistic aspects of 116 research papers which used EEG, fMRI, PET, MEG, or NIRS to investigate the neural processing of the two figurative subtypes metaphor and idiom. We critically examine the theoretical foundations as well as stimulus control by performing a systematic literature synthesis according to the PRISMA guidelines. We explicitly do not analyse the findings of the studies but instead focus on four primary aspects: definitions of figurative language and its subtypes, linguistic theory behind the studies, control for factors influencing figurative language processing, and the relationship between theoretical and operational definitions. We found both a lack and a broad variety in existing definitions and operationalisation, especially in regard to familiarity and conventionality. We identify severe obstacles in the comparability and validation potential of the results of the papers in our review corpus. We propose the development of a consensus in fundamental terminology and more transparency in the reporting of stimulus design in the research on figurative language processing.
- Published
- 2022
- Full Text
- View/download PDF
44. Regulation of GC box activity by 8-oxoguanine
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Nadine Müller and Andriy Khobta
- Subjects
8-Oxoguanine ,8-Oxoguanine DNA Glycosylase (OGG1) ,AP lesion ,GC box ,Base excision repair (BER) ,Medicine (General) ,R5-920 ,Biology (General) ,QH301-705.5 - Abstract
The oxidation-induced DNA modification 8-oxo-7,8-dihydro-2′-deoxyguanosine (8-oxodG) was recently implicated in the activation and repression of gene transcription. We aimed at a systematic characterisation of the impacts of 8-oxodG on the activity of a GC box placed upstream from the RNA polymerase II core promoter. With the help of reporters carrying single synthetic 8-oxodG residues at four conserved G:C base pairs (underlined) within the 5′-TGGGCGGAGC-3′ GC box sequence, we identified two modes of interference of 8-oxodG with the promoter activity. Firstly, 8-oxodG in the purine-rich (but not in the pyrimidine-rich) strand caused direct impairment of transcriptional activation. In addition, and independently of the first mechanism, 8-oxodG initiated a decline of the gene expression, which was mediated by the specific DNA glycosylase OGG1. For the different 8-oxodG positions, the magnitude of this effect reflected the excision preferences of OGG1. Thus, 8-oxodG seeded in the pyrimidine-rich strand was excised with the highest efficiency and caused the most pronounced decrease of the promoter activity. Conversely, 8-oxodG in the symmetric position within the same CpG dinucleotide, was poorly excised and induced no decline of the gene expression. Of note, abasic lesions caused gene silencing in both positions. By contrast, an uncleavable apurinic lesion in the pyrimidine-rich strand enhanced the GC box activity, suggesting that the AP endonuclease step provides a switch between the active versus repressed promoter states during base excision repair.
- Published
- 2021
- Full Text
- View/download PDF
45. Immune cell counts and signaling in body fluids of cows vaccinated against Clostridium difficile
- Author
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Christiane Schmautz, Nadine Müller, Marlene Auer, Ines Ballweg, Michael W. Pfaffl, and Heike Kliem
- Subjects
Gene expression ,Cytokines ,Dairy cattle ,Immunization ,Clostridium difficile ,Biology (General) ,QH301-705.5 - Abstract
Abstract Background New treatment options are needed to prevent relapses following failed antibiotic therapies of Clostridium difficile infections (CDI) in humans. The concomitant therapy with an anti-C. difficile IgA containing whey protein concentrate can support the sustainable recovery of CDI patients. For 31 weeks, nine dairy cows were continuously vaccinated with several anti-C. difficile vaccines by certain routes of administration to produce anti-C. difficile IgA enriched milk. The study aimed at finding decisive differences between low responder (LR) and high responder (HR) cows (> 8.0 µg ml−1 total milk C. difficile specific IgA) concerning their immune response to vaccination on cellular and molecular biological levels. Results The results of total and differential cell counting (DCC) in blood and milk and the outcomes of the gene expression analysis of selected immune factors were assessed relating to the usage of two vaccine batches for injection (MucoCD-I batch A and B), marking two immunization (IM) periods, and compared to a control group (Ctr). The MucoCD-I batch A caused short-term leukopenia followed by leukocytosis in the blood of LR and HR. The total somatic cell counts in milk were not altered by the treatment. The DCC revealed that the leukocytes of the treated groups were partly impaired by the treatment. The gene expression analysis exposed cumulative and sustainable differences (p
- Published
- 2018
- Full Text
- View/download PDF
46. Clonal and Subclonal Cytogenetic Aberrations: Association with D-Type Cyclin Expression and Event-Free Survival (EFS) in Multiple Myeloma (MM)
- Author
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Bernard Klein, Jean-François Rossi, Christiane Heiß, Thomas Möhler, Anna Jauch, Dirk Hose, Hartmut Goldschmidt, Axel Benner, John DeVos, Eric Jourdan, Michael Hundemer, Karène Mahtouk, Thierry Rème, Jérôme Moreaux, Nadine Muller, and Véronique Pantesco
- Subjects
Pathology ,medicine.medical_specialty ,Immunology ,Chromosomal translocation ,Context (language use) ,Cell Biology ,Hematology ,Cell sorting ,Biology ,medicine.disease ,Biochemistry ,Molecular biology ,Gene expression profiling ,medicine.anatomical_structure ,Gene chip analysis ,medicine ,Chromosome abnormality ,Bone marrow ,Multiple myeloma - Abstract
AIM. Expression changes of D-type cyclins are thought to be an early event in the genesis of Multiple Myeloma and are associated with distinct cytogenetic aberrations. These aberrations appear with different percentages (“clonal” or “subclonal”) in a given patient. We assessed whether the height of CCND expression assessed by gene expression profiling and quantitative RT-PCR (qRT-PCR) correlates with the presence of clonal or subclonal aberrations of 11q13, t(11;14) and t(4;14). PATIENTS AND METHODS. 128 newly diagnosed MM-patients (65 training (TG)/63 independent validation group (VG)) and 14 normal donors (ND) were included. Bone marrow aspirates were CD138-purified by activated magnetic cell sorting. RNA was in-vitro transcribed and hybridised to Affymetrix HG U133 A+B GeneChip (TG) and HG U133 2.0 plus array (VG). CCND1 and CCND2 expression was verified by real time RT-PCR and western blotting. iFISH was performed on purified MM-cells using probesets for chromosomes 1q21, 9q34, 11q23, 11q13, 13q14, 15q22, 17p13, 19q13, 22q11 and the translocations t(4;14) and t(11;14). Clonal aberrations were defined as being present in >60%, subclonal aberrations in 20 to 60% of MMC in a given patient. Expression data were gcrma normalised and a Kruskal-Wallis rank sum test used (Bioconductor). RESULTS. 11q13+. CCND1 (208711_s_at, 208712_at) is significantly higher (p CONCLUSION. An additional copy of 11q13 or t(11;14) correlates with increased CCND1 and decreased CCND2 expression, a t(4;14) is associated with an increase of CCND2 and a decrease of CCND1 expression. In each case, the height of the CCND-expression is significantly different whether the respective aberration is clonal or subclonal. Thus, when interpreting expression data in the context of cytogenetic aberrations, it is important to consider if plasma cells carry a respective aberration in a subclonal/clonal pattern.
- Published
- 2006
47. ATM and P53 differentially regulate pancreatic beta cell survival in Ins1E cells.
- Author
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Celina Uhlemeyer, Nadine Müller, Kerstin Grieß, Corinna Wessel, Caroline Schlegel, Jennifer Kuboth, and Bengt-Frederik Belgardt
- Subjects
Medicine ,Science - Abstract
Pancreatic beta cell death is a hallmark of type 1 and 2 diabetes (T1D/T2D), but the underlying molecular mechanisms are incompletely understood. Key proteins of the DNA damage response (DDR), including tumor protein P53 (P53, also known as TP53 or TRP53 in rodents) and Ataxia Telangiectasia Mutated (ATM), a kinase known to act upstream of P53, have been associated with T2D. Here we test and compare the effect of ATM and P53 ablation on beta cell survival in the rat beta cell line Ins1E. We demonstrate that ATM and P53 differentially regulate beta cell apoptosis induced upon fundamentally different types of diabetogenic beta cell stress, including DNA damage, inflammation, lipotoxicity and endoplasmic reticulum (ER) stress. DNA damage induced apoptosis by treatment with the commonly used diabetogenic agent streptozotocin (STZ) is regulated by both ATM and P53. We show that ATM is a key STZ induced activator of P53 and that amelioration of STZ induced cell death by inhibition of ATM mainly depends on P53. While both P53 and ATM control lipotoxic beta cell apoptosis, ATM but not P53 fails to alter inflammatory beta cell death. In contrast, tunicamycin induced (ER stress associated) apoptosis is further increased by ATM knockdown or inhibition, but not by P53 knockdown. Our results reveal differential roles for P53 and ATM in beta cell survival in vitro in the context of four key pathophysiological types of diabetogenic beta cell stress, and indicate that ATM can use P53 independent signaling pathways to modify beta cell survival, dependent on the cellular insult.
- Published
- 2020
- Full Text
- View/download PDF
48. Complement C5 but not C3 is expendable for tissue factor activation by cofactor-independent antiphospholipid antibodies
- Author
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Nadine Müller-Calleja, Svenja Ritter, Anne Hollerbach, Tanja Falter, Karl J. Lackner, and Wolfram Ruf
- Subjects
Specialties of internal medicine ,RC581-951 - Abstract
Abstract: The complement and coagulation cascades interact at multiple levels in thrombosis and inflammatory diseases. In venous thrombosis, complement factor 3 (C3) is crucial for platelet and tissue factor (TF) procoagulant activation dependent on protein disulfide isomerase (PDI). Furthermore, C5 selectively contributes to the exposure of leukocyte procoagulant phosphatidylserine (PS), which is a prerequisite for rapid activation of monocyte TF and fibrin formation in thrombosis. Here, we show that monoclonal cofactor-independent antiphospholipid antibodies (aPLs) rapidly activate TF on myelomonocytic cells. TF activation is blocked by PDI inhibitor and an anti-TF antibody interfering with PDI binding to TF, and requires C3 but unexpectedly not C5. Other prothrombotic, complement-fixing antibodies, for example, antithymocyte globulin, typically induce TF activation dependent on C5b-7–mediated PS exposure on the outer membrane of monocytes. We show that aPLs directly induce procoagulant PS exposure independent of C5. Accordingly, mice deficient in C3, but not mice deficient in C5, are protected from in vivo thrombus formation induced by cofactor-independent aPLs. Only immunoglobulin G (IgG) fractions with cofactor-independent anticardiolipin reactivity from patients with antiphospholipid syndrome (APS) induce complement-independent monocyte PS exposure and PDI-dependent TF activation. Neither a human monoclonal aPL directed against β2-glycoprotein I (β2GPI) nor patient IgG with selective reactivity to β2GPI rapidly activated monocyte TF. These results indicate that inhibitors of PDI and TF, but not necessarily clinically available drugs targeting C5, have therapeutic benefit in preventing thrombosis associated with APS caused by pathogenic aPLs primarily reactive with lipid, independent of β2GPI.
- Published
- 2018
- Full Text
- View/download PDF
49. Direct and Base Excision Repair-Mediated Regulation of a GC-Rich cis-Element in Response to 5-Formylcytosine and 5-Carboxycytosine
- Author
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Nadine Müller, Eveliina Ponkkonen, Thomas Carell, and Andriy Khobta
- Subjects
DNA demethylation ,5-formylcytosine ,5-carboxycytosine ,thymine DNA glycosylase (TDG) ,base excision repair (BER) ,gene regulation ,Biology (General) ,QH301-705.5 ,Chemistry ,QD1-999 - Abstract
Stepwise oxidation of the epigenetic mark 5-methylcytosine and base excision repair (BER) of the resulting 5-formylcytosine (5-fC) and 5-carboxycytosine (5-caC) may provide a mechanism for reactivation of epigenetically silenced genes; however, the functions of 5-fC and 5-caC at defined gene elements are scarcely explored. We analyzed the expression of reporter constructs containing either 2′-deoxy-(5-fC/5-caC) or their BER-resistant 2′-fluorinated analogs, asymmetrically incorporated into CG-dinucleotide of the GC box cis-element (5′-TGGGCGGAGC) upstream from the RNA polymerase II core promoter. In the absence of BER, 5-caC caused a strong inhibition of the promoter activity, whereas 5-fC had almost no effect, similar to 5-methylcytosine or 5-hydroxymethylcytosine. BER of 5-caC caused a transient but significant promoter reactivation, succeeded by silencing during the following hours. Both responses strictly required thymine DNA glycosylase (TDG); however, the silencing phase additionally demanded a 5′-endonuclease (likely APE1) activity and was also induced by 5-fC or an apurinic/apyrimidinic site. We propose that 5-caC may act as a repressory mark to prevent premature activation of promoters undergoing the final stages of DNA demethylation, when the symmetric CpG methylation has already been lost. Remarkably, the downstream promoter activation or repression responses are regulated by two separate BER steps, where TDG and APE1 act as potential switches.
- Published
- 2021
- Full Text
- View/download PDF
50. A Computational Fluid Dynamics Model for a Water Vortex Power Plant as Platform for Etho- and Ecohydraulic Research
- Author
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Dennis Powalla, Stefan Hoerner, Olivier Cleynen, Nadine Müller, Jürgen Stamm, and Dominique Thévenin
- Subjects
water vortex power plant ,computational fluid dynamics (CFD) ,Reynolds-Averaged Navier–Stokes (RANS) ,eulerian multiphase ,volume of fluid (VOF) ,Technology - Abstract
The objective of the present paper is to develop a validated numerical model of a water vortex power plant that serves as a digital twin for further studies such as assessments of the ethohydraulic characteristics or the performance of such devices. The reference for the validation process is a large-scale hydraulic installation equipped with a full-scale water vortex power plant prototype installed in Dresden (Germany), where flow field measurements were carried out using three-dimensional Acoustic Doppler Velocimetry. The numerical model was implemented within the software package Star-CCM+. The unsteady, two-phase flow was solved with the Reynolds-Averaged Navier–Stokes equations in a Eulerian Multiphase approach, deploying a Volume of Fluid method to describe the free-surface flow. Water level and flow velocities were systematically compared in key areas of the device, demonstrating that the simulation is in good agreement with experimental observations. Relative differences are limited to at most 4% regarding water height in the system, and even the much more challenging velocity fields are reproduced with typical relative errors of roughly 10%. This validates the ability of the model to model the challenging flow conditions found in a water vortex power plant, enabling subsequent studies of the characteristics of this power plant concerning fish migration.
- Published
- 2021
- Full Text
- View/download PDF
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