11,200 results on '"Bleich A"'
Search Results
2. Psychotropic drug-induced adverse drug reactions in 462,661 psychiatric inpatients in relation to age: results from a German drug surveillance program from 1993–2016
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Johanna Seifert, Matthias A. Reinhard, Stefan Bleich, Andreas Erfurth, Waldemar Greil, Sermin Toto, Renate Grohmann, and Catherine Glocker
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Geriatric psychiatry ,Aged ,Drug-related side effects and adverse drug reactions ,Drug safety ,Pharmacovigilance ,Polypharmacy ,Psychiatry ,RC435-571 - Abstract
Abstract Background Clinical practice suggests that older adults (i.e., ≥ 65 years of age) experience adverse drug reactions (ADRs) more often than younger patients (i.e.,
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- 2024
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3. Impact of cannabinoids on synapse markers in an SH-SY5Y cell culture model
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Kirsten Jahn, Nina Blumer, Caroline Wieltsch, Laura Duzzi, Heiko Fuchs, Roland Meister, Adrian Groh, Martin Schulze Westhoff, Tillmann Horst Christoph Krüger, Stefan Bleich, Abdul Qayyum Khan, and Helge Frieling
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Psychiatry ,RC435-571 - Abstract
Abstract Patients suffering from schizophrenic psychosis show reduced synaptic connectivity compared to healthy individuals, and often, the use of cannabis precedes the onset of schizophrenic psychosis. Therefore, we investigated if different types of cannabinoids impact methylation patterns and expression of schizophrenia candidate genes concerned with the development and preservation of synapses and synaptic function in a SH-SY5Y cell culture model. For this purpose, SH-SY5Y cells were differentiated into a neuron-like cell type as previously described. Effects of the cannabinoids delta-9-THC, HU-210, and Anandamide were investigated by analysis of cell morphology and measurement of neurite/dendrite lengths as well as determination of methylation pattern, expression (real time-qPCR, western blot) and localization (immunocytochemistry) of different target molecules concerned with the formation of synapses. Regarding the global impression of morphology, cells, and neurites appeared to be a bit more blunted/roundish and to have more structures that could be described a bit boldly as resembling transport vesicles under the application of the three cannabinoids in comparison to a sole application of retinoic acid (RA). However, there were no obvious differences between the three cannabinoids. Concerning dendrites or branch lengths, there was a significant difference with longer dendrites and branches in RA-treated cells than in undifferentiated control cells (as shown previously), but there were no differences between cannabinoid treatment and exclusive RA application. Methylation rates in the promoter regions of synapse candidate genes in cannabinoid-treated cells were in between those of differentiated cells and untreated controls, even though findings were significant only in some of the investigated genes. In other targets, the methylation rates of cannabinoid-treated cells did not only approach those of undifferentiated cells but were also valued even beyond. mRNA levels also showed the same tendency of values approaching those of undifferentiated controls under the application of the three cannabinoids for most investigated targets except for the structural molecules (NEFH, MAPT). Likewise, the quantification of expression via western blot analysis revealed a higher expression of targets in RA-treated cells compared to undifferentiated controls and, again, lower expression under the additional application of THC in trend. In line with our earlier findings, the application of RA led to higher fluorescence intensity and/or a differential signal distribution in the cell in most of the investigated targets in ICC. Under treatment with THC, fluorescence intensity decreased, or the signal distribution became similar to the dispersion in the undifferentiated control condition. Our findings point to a decline of neuronal differentiation markers in our in vitro cell-culture system under the application of cannabinoids.
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- 2024
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4. Influence of inpatient withdrawal treatment on drug safety in alcohol use disorder — a quasi-experimental pre-post study
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Sebastian Schröder, Martin Schulze Westhoff, Stefan Bleich, Henry Bode, Konstantin Fritz Jendretzky, Benjamin Krichevsky, Alexander Glahn, and Johannes Heck
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Alcohol use disorder ,Drug safety ,Alcohol–medication interactions ,Potentially inappropriate medications ,Drug–drug interactions ,Psychiatry ,RC435-571 - Abstract
Abstract Objective Most patients with alcohol use disorder (AUD) regularly take medication. Alcohol interacts negatively with many commonly prescribed medications. Little is known about whether the risk of potential alcohol-medication and drug-drug interactions increases or decreases in patients with AUD during inpatient withdrawal treatment. The aim of our study was to determine the prevalence and characteristics of potential alcohol-medication and drug-drug interactions in patients with AUD before and after withdrawal treatment in an addiction unit. Design Prospective monocentric quasi-experimental pre-post study. Methods Medication records before and after withdrawal treatment were analyzed and screened for potential alcohol-medication (pAMI) and drug-drug interactions (pDDI) using the drugs.com classification and the AiDKlinik ® electronic interaction program, respectively. Results We enrolled 153 patients with AUD who were treated in an addiction unit of a university hospital in Germany. Of these, 67.3% experienced at least one pAMI before and 91.5% after withdrawal treatment. In total, there were 278 pAMIs classified as “mild,” “moderate,” or “severe” before and 370 pAMIs after withdrawal treatment. Additionally, there were 76 pDDIs classified as “moderate,” “severe,” or “contraindicated combinations” both before and after withdrawal treatment. Conclusion The risk of exposure to pAMIs and pDDIs increases during inpatient withdrawal treatment in patients with AUD. Improvements in the quality of prescribing should particularly focus on the use of antihypertensives and opioids.
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- 2024
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5. A case study of the informative value of risk of bias and reporting quality assessments for systematic reviews
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Cathalijn H. C. Leenaars, Frans R. Stafleu, Christine Häger, and André Bleich
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Risk of bias ,Reporting quality ,Systematic reviews ,Informative value ,Cystic fibrosis ,Nasal potential difference ,Medicine - Abstract
Abstract While undisputedly important, and part of any systematic review (SR) by definition, evaluation of the risk of bias within the included studies is one of the most time-consuming parts of performing an SR. In this paper, we describe a case study comprising an extensive analysis of risk of bias (RoB) and reporting quality (RQ) assessment from a previously published review (CRD42021236047). It included both animal and human studies, and the included studies compared baseline diseased subjects with controls, assessed the effects of investigational treatments, or both. We compared RoB and RQ between the different types of included primary studies. We also assessed the “informative value” of each of the separate elements for meta-researchers, based on the notion that variation in reporting may be more interesting for the meta-researcher than consistently high/low or reported/non-reported scores. In general, reporting of experimental details was low. This resulted in frequent unclear risk-of-bias scores. We observed this both for animal and for human studies and both for disease-control comparisons and investigations of experimental treatments. Plots and explorative chi-square tests showed that reporting was slightly better for human studies of investigational treatments than for the other study types. With the evidence reported as is, risk-of-bias assessments for systematic reviews have low informative value other than repeatedly showing that reporting of experimental details needs to improve in all kinds of in vivo research. Particularly for reviews that do not directly inform treatment decisions, it could be efficient to perform a thorough but partial assessment of the quality of the included studies, either of a random subset of the included publications or of a subset of relatively informative elements, comprising, e.g. ethics evaluation, conflicts of interest statements, study limitations, baseline characteristics, and the unit of analysis. This publication suggests several potential procedures.
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- 2024
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6. Enhancing ECG Analysis of Implantable Cardiac Monitor Data: An Efficient Pipeline for Multi-Label Classification
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Bleich, Amnon, Linnemann, Antje, Jaidi, Benjamin, Diem, Björn H, and Conrad, Tim OF
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Electrical Engineering and Systems Science - Signal Processing ,Computer Science - Machine Learning ,68U10 (Primary) 68T10, 62H30 (Secondary) ,J.3 ,I.5.3 - Abstract
Implantable Cardiac Monitor (ICM) devices are demonstrating as of today, the fastest-growing market for implantable cardiac devices. As such, they are becoming increasingly common in patients for measuring heart electrical activity. ICMs constantly monitor and record a patient's heart rhythm and when triggered - send it to a secure server where health care professionals (denote HCPs from here on) can review it. These devices employ a relatively simplistic rule-based algorithm (due to energy consumption constraints) to alert for abnormal heart rhythms. This algorithm is usually parameterized to an over-sensitive mode in order to not miss a case (resulting in relatively high false-positive rate) and this, combined with the device's nature of constantly monitoring the heart rhythm and its growing popularity, results in HCPs having to analyze and diagnose an increasingly growing amount of data. In order to reduce the load on the latter, automated methods for ECG analysis are nowadays becoming a great tool to assist HCPs in their analysis. While state-of-the-art algorithms are data-driven rather than rule-based, training data for ICMs often consist of specific characteristics which make its analysis unique and particularly challenging. This study presents the challenges and solutions in automatically analyzing ICM data and introduces a method for its classification that outperforms existing methods on such data. As such, it could be used in numerous ways such as aiding HCPs in the analysis of ECGs originating from ICMs by e.g. suggesting a rhythm type.
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- 2023
7. Structured neurological soft signs examination reveals motor coordination deficits in adults diagnosed with high-functioning autism
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Jelte Wieting, Madita Vanessa Baumann, Stephanie Deest-Gaubatz, Stefan Bleich, Christian Karl Eberlein, Helge Frieling, and Maximilian Deest
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High functioning autism ,Autism spectrum disease ,Neurological soft signs ,Motor coordination ,Adult ,Intelligence ,Medicine ,Science - Abstract
Abstract Neurological soft signs (NSS), discrete deficits in motor coordination and sensory integration, have shown promise as markers in autism diagnosis. While motor impairments, partly associated with core behavioral features, are frequently found in children with autism, there is limited evidence in adults. In this study, NSS were assessed in adults undergoing initial diagnosis of high-functioning autism (HFA), a subgroup difficult to diagnose due to social adaptation and psychiatric comorbidity. Adults with HFA (n = 34) and 1:1 sex-, age-, and intelligence-matched neurotypical controls were administered a structured NSS examination including motor, sensory, and visuospatial tasks. We showed that adults with HFA have significantly increased motor coordination deficits compared with controls. Using hierarchical cluster analysis within the HFA group, we also identified a subgroup that was particularly highly affected by NSS. This subgroup differed from the less affected by intelligence level, but not severity of autism behavioral features nor global psychological distress. It remains questionable whether motor impairment represents a genuinely autistic trait or is more a consequence of factors such as intelligence. Nevertheless, we conclude that examining NSS in terms of motor coordination may help diagnose adults with HFA and identify HFA individuals who might benefit from motor skills interventions.
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- 2024
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8. Smoking patterns and the intention to quit in German cancer patients: a cross-sectional study
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Frederike Bokemeyer, Lisa Lebherz, Carsten Bokemeyer, Kathleen Gali, Holger Schulz, and Christiane Bleich
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Cancer ,Smoking cessation ,Psycho-oncology ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Abstract Background Continued smoking after a cancer diagnosis can be associated with lower treatment tolerance, poorer outcomes, and reduced quality of life compared to non-smoking cancer patients or to those who have quit. Yet about 60% of patients continue to smoke after being diagnosed and find it difficult to quit. To address this problem, it is necessary to identify current and past smoking patterns (e.g., frequency of use, types of tobacco products) and determine whether there is motivation to quit. Similarly, factors associated with continued smoking should be identified. These data will provide the basis for the development of smoking cessation programs tailored to the needs of cancer patients. Methods A questionnaire was distributed to cancer patients older than 18 years in a German Comprehensive Cancer Center. Participating cancer patients were divided into three main groups: 1) patients who stopped smoking before being diagnosed with cancer (Ex-before); 2) patients who stopped smoking after a cancer diagnosis (Ex-after); and 3) patients who currently smoke cigarettes (CS). Sociodemographic, medical, and psychosocial data were collected, as well as smoking patterns and the motivation to quit smoking. Results About half of patients (51%) who smoked before diagnosis continue to smoke after a cancer diagnosis. Being diagnosed with a tobacco-related cancer type was associated with a decreased probability of continued smoking. Patients with tobacco-related tumors and receiving positive support in burdensome situations were more likely to have a higher cigarette dependence. Of all CS, 59.1% had intention to quit, and 22.7% reported having taken action to quit. The support by a smoking cessation program was considered important. CS were willing to spend up to €100 for support and were open to multiple sessions per week, group sessions, one-on-one sessions and/or online support. Conclusion These findings underscore the importance of educating cancer patients about the consequences of smoking and to provide them with support to quit. Identified risk factors may further help to recognize cancer patients with high risk of continued smoking after diagnosis. Trial Registration The study was registered at OSF ( https://osf.io/3c9km ) and published as a study protocol at “ https://bmjopen.bmj.com/content/13/4/e069570 ”.
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- 2024
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9. Barriers, Facilitators, and Requirements for a Telerehabilitation Aftercare Program for Patients After Occupational Injuries: Semistructured Interviews With Key Stakeholders
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Lukas Lange-Drenth, Holger Schulz, Isabell Suck, and Christiane Bleich
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Medicine - Abstract
BackgroundPatients with occupational injuries often receive multidisciplinary rehabilitation for a rapid return to work. Rehabilitation aftercare programs give patients the opportunity to help patients apply the progress they have made during the rehabilitation to their everyday activities. Telerehabilitation aftercare programs can help reduce barriers, such as lack of time due to other commitments, because they can be used regardless of time or location. Careful identification of barriers, facilitators, and design requirements with key stakeholders is a critical step in developing a telerehabilitation aftercare program. ObjectiveThis study aims to identify barriers, facilitators, and design requirements for a future telerehabilitation aftercare program for patients with occupational injuries from the perspective of the key stakeholders. MethodsWe used a literature review and expert recommendations to identify key stakeholders. We conducted semistructured interviews in person and via real-time video calls with 27 key stakeholders to collect data. Interviews were transcribed verbatim, and thematic analysis was applied. We selected key stakeholder statements about facilitators and barriers and categorized them as individual, technical, environmental, and organizational facilitators and barriers. We identified expressions that captured aspects that the telerehabilitation aftercare program should fulfill and clustered them into attributes and overarching values. We translated the attributes into one or more requirements and grouped them into content, functional, service, user experience, and work context requirements. ResultsThe key stakeholders identified can be grouped into the following categories: patients, health care professionals, administrative personnel, and members of the telerehabilitation program design and development team. The most frequently reported facilitators of a future telerehabilitation aftercare program were time savings for patients, high motivation of the patients to participate in telerehabilitation aftercare program, high usability of the program, and regular in-person therapy meetings during the telerehabilitation aftercare program. The most frequently reported barriers were low digital affinity and skills of the patients and personnel, patients’ lack of trust and acceptance of the telerehabilitation aftercare program, slow internet speed, program functionality problems (eg, application crashes or freezes), and inability of telerehabilitation to deliver certain elements of in-person rehabilitation aftercare such as monitoring exercise performance. In our study, the most common design requirements were reducing barriers and implementing facilitators. The 2 most frequently discussed overarching values were tailoring of telerehabilitation, such as a tailored exercise plan and tailored injury-related information, and social interaction, such as real-time psychotherapy and digital and in-person rehabilitation aftercare in a blended care approach. ConclusionsKey stakeholders reported on facilitators, barriers, and design requirements that should be considered throughout the development process. Tailoring telerehabilitation content was the key value for stakeholders to ensure the program could meet the needs of patients with different types of occupational injuries.
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- 2024
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10. Phenotyping lipid profiles in type 2 diabetes: Risk association and outcomes from the Cardiovascular Health Study
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David Bleich, Mary L. Biggs, Julius M. Gardin, Mary Lyles, David S. Siscovick, and Kenneth J. Mukamal
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Type 2 diabetes ,Cardiovascular risk ,Lipid phenotyping ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 ,Public aspects of medicine ,RA1-1270 - Abstract
Aims: To determine whether discrete lipid profiles (refer to as lipid phenotyping) can be used to stratify cardiovascular risk in individuals with type 2 diabetes. Methods and results: Cardiovascular Health Study participants with diabetes and fasting lipid profiles at baseline (n = 866) were categorized separately by level of LDL cholesterol and HDL-C/Triglyceride (Tg) profiles (low Tg/high HDL-C; high Tg/low HDL-C; high Tg only or low HDL-C only). We performed Cox multivariate regression analysis to assess the risk of CVD mortality, incident myocardial infarction (MI), heart failure (HF), stroke, and composite MACE (MI, HF, stroke, and CVD mortality) associated with each lipid category. We also calculated risk estimates for MACE using lipid measures as continuous variables. In the fully adjusted model, the high triglyceride plus low HDL-C cholesterol phenotype demonstrated risk that was at least as high as the highest LDL-C sub-group phenotype for CVD mortality (Hazard ratio {HR} 1.58 vs 1.48), MI (HR 1.53 vs 1.58), HF (HR 1.47 vs 1.20), stroke (HR 2.02 vs 1.43), and MACE (HR 1.58 vs 1.38). When modeled continuously, the HR per SD for MACE was 1.12 (p = 0.03) for LDL-C and 1.19–1.20 (p < 0.001) for triglycerides or remnant cholesterol. Conclusions: Participants with the high triglyceride/low HDL-C phenotype had equivalent or higher CVD risk than those with the high LDL-C phenotype. Further studies are necessary to determine whether lipid phenotyping accounts for the substantial CVD risk not explained by LDL cholesterol among individuals with type 2 diabetes.
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- 2024
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11. Health Monitoring Programmes and International Standards
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Nicklas, Werner, Buchheister, Stephanie, Bleich, André, Brønstad, Aurora, Series Editor, Morgado, José Sanchez, Series Editor, Benavides, Fernando, editor, and Hansen, Axel Kornerup, editor
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- 2024
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12. Genetic Aspects of Obesity
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Frieling, Helge, Hinney, Anke, Bleich, Stefan, Herpertz, Stephan, editor, de Zwaan, Martina, editor, and Zipfel, Stephan, editor
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- 2024
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13. Genetic Aspects of Eating Disorders
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Frieling, Helge, Bleich, Stefan, Buchholz, Vanessa, Herpertz, Stephan, editor, de Zwaan, Martina, editor, and Zipfel, Stephan, editor
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- 2024
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14. A systematic review of animal and human data comparing the nasal potential difference test between cystic fibrosis and control
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Cathalijn H. C. Leenaars, Frans R. Stafleu, Christine Häger, Hendrik Nieraad, and André Bleich
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Animal-to-human translation ,Cystic fibrosis ,Nasal potential difference ,Electrophysiology ,Predictive value ,Reproducibility ,Medicine ,Science - Abstract
Abstract The nasal potential difference test (nPD) is an electrophysiological measurement which is altered in patients and animal models with cystic fibrosis (CF). Because protocols and outcomes vary substantially between laboratories, there are concerns over its validity and precision. We performed a systematic literature review (SR) of the nPD to answer the following review questions: A. Is the nasal potential difference similarly affected in CF patients and animal models?”, and B. “Is the nPD in human patients and animal models of CF similarly affected by various changes in the experimental set-up?”. The review protocol was preregistered on PROSPERO (CRD42021236047). We searched PubMed and Embase with comprehensive search strings. Two independent reviewers screened all references for inclusion and extracted all data. Included were studies about CF which described in vivo nPD measurements in separate CF and control groups. Risk of bias was assessed, and three meta-analyses were performed. We included 130 references describing nPD values for CF and control subjects, which confirmed substantial variation in the experimental design and nPD outcome between groups. The meta-analyses showed a clear difference in baseline nPD values between CF and control subjects, both in animals and in humans. However, baseline nPD values were, on average, lower in animal than in human studies. Reporting of experimental details was poor for both animal and human studies, and urgently needs to improve to ensure reproducibility of experiments within and between species.
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- 2024
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15. Validation of the predictive value of BDNF -87 methylation for antidepressant treatment success in severely depressed patients—a randomized rater-blinded trial
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Hannah Benedictine Maier, Alexandra Neyazi, Gabriel L. Bundies, Fiona Meyer-Bockenkamp, Stefan Bleich, Hansi Pathak, Yvonne Ziert, Barbara Neuhaus, Franz-Josef Müller, Iris Pollmann, Thomas Illig, Stefanie Mücke, Meike Müller, Brinja Kira Möller, Steffen Oeltze-Jafra, Tim Kacprowski, Jan Voges, Fabian Müntefering, Josef Scheiber, Andreas Reif, Mareike Aichholzer, Christine Reif-Leonhard, Maren Schmidt-Kassow, Ulrich Hegerl, Hanna Reich, Stefan Unterecker, Heike Weber, Jürgen Deckert, Nicole Bössel-Debbert, Hans J. Grabe, Michael Lucht, and Helge Frieling
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BDNF ,Biomarker ,RCT ,Major depressive disorder ,Medicine (General) ,R5-920 - Abstract
Abstract Background Brain-derived neurotrophic factor (BDNF) is essential for antidepressant treatment of major depressive disorder (MDD). Our repeated studies suggest that DNA methylation of a specific CpG site in the promoter region of exon IV of the BDNF gene (CpG -87) might be predictive of the efficacy of monoaminergic antidepressants such as selective serotonin reuptake inhibitors (SSRIs), serotonin-norepinephrine reuptake inhibitors (SNRIs), and others. This trial aims to evaluate whether knowing the biomarker is non-inferior to treatment-as-usual (TAU) regarding remission rates while exhibiting significantly fewer adverse events (AE). Methods The BDNF trial is a prospective, randomized, rater-blinded diagnostic study conducted at five university hospitals in Germany. The study’s main hypothesis is that {1} knowing the methylation status of CpG -87 is non-inferior to not knowing it with respect to the remission rate while it significantly reduces the AE rate in patients experiencing at least one AE. The baseline assessment will occur upon hospitalization and a follow-up assessment on day 49 (± 3). A telephone follow-up will be conducted on day 70 (± 3). A total of 256 patients will be recruited, and methylation will be evaluated in all participants. They will be randomly assigned to either the marker or the TAU group. In the marker group, the methylation results will be shared with both the patient and their treating physician. In the TAU group, neither the patients nor their treating physicians will receive the marker status. The primary endpoints include the rate of patients achieving remission on day 49 (± 3), defined as a score of ≤ 10 on the Hamilton Depression Rating Scale (HDRS-24), and the occurrence of AE. Ethics and dissemination The trial protocol has received approval from the Institutional Review Boards at the five participating universities. This trial holds significance in generating valuable data on a predictive biomarker for antidepressant treatment in patients with MDD. The findings will be shared with study participants, disseminated through professional society meetings, and published in peer-reviewed journals. Trial registration German Clinical Trial Register DRKS00032503. Registered on 17 August 2023.
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- 2024
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16. Continuous monitoring of physiological data using the patient vital status fusion score in septic critical care patients
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Philipp L. S. Ohland, Thomas Jack, Marcel Mast, Anette Melk, André Bleich, and Steven R. Talbot
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Patient vital status ,Quantitative scoring ,Intensive care unit ,Disease severity ,Patient monitoring ,Patient analysis tool ,Medicine ,Science - Abstract
Abstract Accurate and standardized methods for assessing the vital status of patients are crucial for patient care and scientific research. This study introduces the Patient Vital Status (PVS), which quantifies and contextualizes a patient's physical status based on continuous variables such as vital signs and deviations from age-dependent normative values. The vital signs, heart rate, oxygen saturation, respiratory rate, mean arterial blood pressure, and temperature were selected as input to the PVS pipeline. The method was applied to 70 pediatric patients in the intensive care unit (ICU), and its efficacy was evaluated by matching high values with septic events at different time points in patient care. Septic events included systemic inflammatory response syndrome (SIRS) and suspected or proven sepsis. The comparison of maximum PVS values between the presence and absence of a septic event showed significant differences (SIRS/No SIRS: p
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- 2024
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17. Gut microbiota depletion delays somatic peripheral nerve development and impairs neuromuscular junction maturation
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Matilde Cescon, Giovanna Gambarotta, Sonia Calabrò, Chiara Cicconetti, Francesca Anselmi, Svenja Kankowski, Luisa Lang, Marijana Basic, Andre Bleich, Silvia Bolsega, Matthias Steglich, Salvatore Oliviero, Stefania Raimondo, Dario Bizzotto, Kirsten Haastert-Talini, and Giulia Ronchi
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Germ-free mice ,gnotobiotic mice ,peripheral nerve development ,skeletal muscle ,myelin ,Schwann cells ,Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
Gut microbiota is responsible for essential functions in human health. Several communication axes between gut microbiota and other organs via neural, endocrine, and immune pathways have been described, and perturbation of gut microbiota composition has been implicated in the onset and progression of an emerging number of diseases. Here, we analyzed peripheral nerves, dorsal root ganglia (DRG), and skeletal muscles of neonatal and young adult mice with the following gut microbiota status: a) germ-free (GF), b) gnotobiotic, selectively colonized with 12 specific gut bacterial strains (Oligo-Mouse-Microbiota, OMM12), or c) natural complex gut microbiota (CGM). Stereological and morphometric analyses revealed that the absence of gut microbiota impairs the development of somatic median nerves, resulting in smaller diameter and hypermyelinated axons, as well as in smaller unmyelinated fibers. Accordingly, DRG and sciatic nerve transcriptomic analyses highlighted a panel of differentially expressed developmental and myelination genes. Interestingly, the type III isoform of Neuregulin1 (NRG1), known to be a neuronal signal essential for Schwann cell myelination, was overexpressed in young adult GF mice, with consequent overexpression of the transcription factor Early Growth Response 2 (Egr2), a fundamental gene expressed by Schwann cells at the onset of myelination. Finally, GF status resulted in histologically atrophic skeletal muscles, impaired formation of neuromuscular junctions, and deregulated expression of related genes. In conclusion, we demonstrate for the first time a gut microbiota regulatory impact on proper development of the somatic peripheral nervous system and its functional connection to skeletal muscles, thus suggesting the existence of a novel ‘Gut Microbiota-Peripheral Nervous System-axis.’
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- 2024
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18. Investigation of the relationship between neuroplasticity and grapheme-color synesthesia
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Nadine Eckardt, Christopher Sinke, Stefan Bleich, Ralf Lichtinghagen, and Markus Zedler
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synesthesia ,neuroplasticity ,brain-derived neurotrophic factor ,connectivity ,hyperconnected brain ,embryonic relict ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Grapheme-color synesthesia is a normal and healthy variation of human perception. It is characterized by the association of letters or numbers with color perceptions. The etiology of synesthesia is not yet fully understood. Theories include hyperconnectivity in the brain, cross-activation of adjacent or functionally proximate sensory areas of the brain, or various models of lack of inhibitory function in the brain. The growth factor brain-derived neurotrophic (BDNF) plays an important role in the development of neurons, neuronal pathways, and synapses, as well as in the protection of existing neurons in both the central and peripheral nervous systems. ELISA methods were used to compare BDNF serum concentrations between healthy test subjects with and without grapheme-color synesthesia to establish a connection between concentration and the occurrence of synesthesia. The results showed that grapheme-color synesthetes had an increased BDNF serum level compared to the matched control group. Increased levels of BDNF can enhance the brain's ability to adapt to changing environmental conditions, injuries, or experiences, resulting in positive effects. It is discussed whether the integration of sensory information is associated with or results from increased neuroplasticity. The parallels between neurodegeneration and brain regeneration lead to the conclusion that synesthesia, in the sense of an advanced state of consciousness, is in some cases a more differentiated development of the brain rather than a relic of early childhood.
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- 2024
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19. Isabelline coloration: a heretofore unrecognized chromatic aberration in bighorn sheep
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Vernon C. Bleich
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adaptation ,albinism ,bighorn sheep ,chromatic disorder ,coloration ,fitness ,isabellinism ,leucism ,natural selection ,ovis canadensis ,pelage ,piebaldism ,Science - Abstract
Coloration is among the characteristics noted first by observers, and color has a strong influence on how animals are perceived. Abnormal coloration has been reported in a variety of taxa, but less frequently among mammals than other classes of vertebrates. Chromatic disorders occurring among Mammalia include albinism, leucism, piebaldism, melanism, xanthism, erythrism, and isabellinism, but only leucism, melanism, and piebaldism have been confirmed in bighorn sheep (Ovis canadensis); ‘albinism’ has been reported in that taxon, but in the absence confirmatory evidence. Bighorn sheep possessing white, or extremely light-colored pelage, have been described in the literature as albinistic, leucistic, or simply as ‘white’. Isabellinism is a genetic anomaly that manifests as sandy- or cream-colored pelage that appears washed-out and otherwise would be dark in color. Some reports of albinistic, leucistic, or ‘white’ bighorn sheep, however, likely represent animals that were of isabelline coloration. This is the first paper to ascribe this unusual color morph to bighorn sheep, and I (1) provide photographs, references, and other evidence of what appears to be isabellinism in that species; (2) explain why those observing ‘white’ bighorn sheep likely have failed to recognize isabelline coloration; (3) discuss the evolutionary consequences of that anomalous condition in terms of fitness and future adaptation; (4) emphasize the role of what may appear to be meaningless observations in terms of their potential ramifications for understanding or explaining phenomena that heretofore have not been fully explored; and (5) encourage readers to recognize that natural history observations have potentially important implications for the interpretation of adaptation and natural selection, and can provide new insight into prior conclusions or future applications.
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- 2024
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20. Phenotyping lipid profiles in type 2 diabetes: Risk association and outcomes from the Cardiovascular Health Study
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Bleich, David, Biggs, Mary L., Gardin, Julius M., Lyles, Mary, Siscovick, David S., and Mukamal, Kenneth J.
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- 2024
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21. A targeted long-read sequencing approach questions the association of OXTR methylation with high-functioning autism
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Jelte Wieting, Kirsten Jahn, Stefan Bleich, Helge Frieling, and Maximilian Deest
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High-functioning autism ,Oxytocin receptor ,OXTR ,Nanopore Cas9-targeted sequencing ,Long-read sequencing ,Methylation ,Medicine ,Genetics ,QH426-470 - Abstract
Abstract Background DNA sequence variation and altered epigenetic regulation of the oxytocin receptor gene (OXTR) have been implicated in autism and autistic-like behaviors. While previous studies have examined subsegments of OXTR, nanopore Cas9-targeted sequencing (nCATS) allows deep characterization of entire genes with simultaneous assessment of epigenetic 5-methylcytosine (5mC) modification and without the need for prior DNA amplification or bisulfite conversion. This pilot study uses an nCATS approach to sequence the entire OXTR gene and its regulatory construct and screen for 5mC modification to compare results between individuals with high-functioning autism (HFA) and neurotypical controls (NC). Methods Using DNA extracted from peripheral blood, OXTR (Hg38, chr3: 8750381–8770434, 20,054 base pairs) was analyzed by nCATS. 5mC modification probabilities were calculated and visualized across the gene and differential methylation analysis was performed. Results Twenty adults with HFA (10 males, 10 females) and 20 age- and sex-matched NC (± 5 years) were included. There were no apparent group differences in the entire OXTR gene sequence, except for the intron variant rs918316, which was clustered in the HFA group. However, differential methylation analysis did not reveal a single significant group-dependent differentially methylated site among the 412 CpG sites captured. Limitations Limitations of this study include the small number of samples due to the pilot nature of the study, which particularly limits the relevance of the sequence variants found. It should also be noted that the use of peripheral blood material limits the ability to draw conclusions about central processes. Conclusions Previous findings of autism-associated OXTR epigenetic alterations were not reproducible with our method. In our opinion, this may lead to a reconsideration of the relevance of altered methylation at individual OXTR CpG positions in autism research. However, given the pilot nature of the study, these results need to be replicated in independent cohorts and with larger sample sizes.
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- 2023
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22. A consortia of clinical E. coli strains with distinct in vitro adherent/invasive properties establish their own co-colonization niche and shape the intestinal microbiota in inflammation-susceptible mice
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Rachel M. Bleich, Chuang Li, Shan Sun, Ju-Hyun Ahn, Belgin Dogan, Cassandra J. Barlogio, Christopher A. Broberg, Adrienne R. Franks, Emily Bulik-Sullivan, Ian M. Carroll, Kenneth W. Simpson, Anthony A. Fodor, and Janelle C. Arthur
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Inflammatory bowel disease ,Colitis ,AIEC ,Adherent-invasive E. coli ,Mucosal colonization ,Intestinal microbiota ,Microbial ecology ,QR100-130 - Abstract
Abstract Background Inflammatory bowel disease (IBD) patients experience recurrent episodes of intestinal inflammation and often follow an unpredictable disease course. Mucosal colonization with adherent-invasive Escherichia coli (AIEC) are believed to perpetuate intestinal inflammation. However, it remains unclear if the 24-year-old AIEC in vitro definition fully predicts mucosal colonization in vivo. To fill this gap, we have developed a novel molecular barcoding approach to distinguish strain variants in the gut and have integrated this approach to explore mucosal colonization of distinct patient-derived E. coli isolates in gnotobiotic mouse models of colitis. Results Germ-free inflammation-susceptible interleukin-10-deficient (Il10 −/− ) and inflammation-resistant WT mice were colonized with a consortium of AIEC and non-AIEC strains, then given a murine fecal transplant to provide niche competition. E. coli strains isolated from human intestinal tissue were each marked with a unique molecular barcode that permits identification and quantification by barcode-targeted sequencing. 16S rRNA sequencing was used to evaluate the microbiome response to E. coli colonization. Our data reveal that specific AIEC and non-AIEC strains reproducibly colonize the intestinal mucosa of WT and Il10 −/− mice. These E. coli expand in Il10 −/− mice during inflammation and induce compositional dysbiosis to the microbiome in an inflammation-dependent manner. In turn, specific microbes co-evolve in inflamed mice, potentially diversifying E. coli colonization patterns. We observed no selectivity in E. coli colonization patterns in the fecal contents, indicating minimal selective pressure in this niche from host-microbe and interbacterial interactions. Because select AIEC and non-AIEC strains colonize the mucosa, this suggests the in vitro AIEC definition may not fully predict in vivo colonization potential. Further comparison of seven E. coli genomes pinpointed unique genomic features contained only in highly colonizing strains (two AIEC and two non-AIEC). Those colonization-associated features may convey metabolic advantages (e.g., iron acquisition and carbohydrate consumption) to promote efficient mucosal colonization. Conclusions Our findings establish the in vivo mucosal colonizer, not necessarily AIEC, as a principal dysbiosis driver through crosstalk with host and associated microbes. Furthermore, we highlight the utility of high-throughput screens to decode the in vivo colonization dynamics of patient-derived bacteria in murine models. Video Abstract
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- 2023
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23. Clinical and sociodemographic predictors of inpatient admission after presentation in a psychiatric emergency room: an observational study
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Gianna L. Gisy, Sermin Toto, Stefan Bleich, Hannah B. Maier, and Johanna Seifert
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Emergency psychiatry ,Admission predictor ,Discharge ,Suicide ,Suicide attempt ,Self-harm ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Abstract Background The admission decision after presentation in the psychiatric emergency room (PER) has potentially far-reaching consequences for the patient and the community. In a short amount of time, information must be collected and evaluated for a well-founded admission decision. The present study aimed to identify risk factors associated with inpatient psychiatric admission (IPA) after previous emergency presentation to the PER. Methods Electronic patient records for all patients presenting in the PER of Hannover Medical School (MHH) in the year 2022 were retrospectively examined (n = 2580). Out of these, 2387 were included in this study. Two multivariate binary logistic regression analyses were performed to identify risk factors for IPA within sociodemographic, circumstantial and clinical variables. Results 1300 (54.5%) consultations resulted in IPA. The most significant sociodemographic and circumstantial risk factors for IPA were found to be suicide attempt (depending on method: OR 9.1–17.4), aggressive behavior towards people prior to presentation (OR 2.9, 95% CI 1.7–4.8), previous psychiatric treatment (OR 1.8, 95% CI 1.4–2.3) and transfer from another hospital or medical discipline of MHH as means of presentation (OR 6.3, 95% CI 3.0–13.0). Among psychopathological aspects, suicidal ideation (OR 3.8, 95% CI 2.9–4.9), suicidal intent (OR 116.0, 95% CI 15.9–844.8), disturbance of orientation (OR 3.7, 95% CI 2.5–5.3), delusions (OR 2.3, 95% CI 1.6–3.1), visual hallucinations (OR 2.9, 95% CI 1.6–5.1), hopelessness/despair (OR 2.4, 95% CI 1.7–3.2) and inhibition of drive (OR 1.6, 95% CI 1.3–2.1) were significantly associated with IPA. Conclusions The admission decision is a complex process influenced by a multitude of sociodemographic, circumstantial and clinical factors. A deeper understanding of the decision-making process can be used to improve patient care and facilitate the evaluation process in the PER.
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- 2023
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24. Neurological soft signs and olfactory dysfunction in patients with borderline personality disorder
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Bettinger, Sören, Höpfner, Sarina, Deest-Gaubatz, Stephanie, Simon, Lennart, Matin-Mann, Farnaz, Weber, Constantin, Schülke, Rasmus, Bleich, Stefan, Frieling, Helge, Neyazi, Alexandra, and Maier, Hannah Benedictine
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- 2024
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25. Estimating Young Children’s Exposure to Food and Beverage Marketing on Mobile Devices
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Kenney, Erica L, Mozaffarian, Rebecca S, Norris, Jasmine, Fleming-Milici, Frances, and Bleich, Sara N
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- 2024
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26. Philadelphia Beverage Tax's Impact on Beverage Ad Expenditures and Number of Ads Purchased
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Hua, Sophia V., Lee, Matthew M., Mozaffarian, Rebecca, Bleich, Sara N., Roberto, Christina A., Fleming-Milici, Frances, Stephenson, Briana, and Kenney, Erica L.
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- 2024
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27. Ultrasound-induced immune responses in tumors: A systematic review and meta-analysis
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Rix, Anne, Heinrichs, Helen, Porte, Céline, Leenaars, Cathalijn, Bleich, André, and Kiessling, Fabian
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- 2024
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28. Perceptions and attitudes of the nursing staff towards patient restraint
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Bleich Avi, Melamed Yuval, Behrbalk Pnina, Gelkopf Marc, and Roffe Ziva
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Psychiatry ,RC435-571 - Published
- 2007
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29. Born to be free: the influence of raising the awareness of the nursing staff to the reduction of the use of physical restraints on restraint orders, hours of restraint and the numbers of patients restrained – a retrospective study
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Bleich Avi, Melamed Yuval, Behrbalk Pnina, Levi Galit, and Dahan Sagit
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Psychiatry ,RC435-571 - Published
- 2007
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30. Editorial: Advances in the conservation of large terrestrial mammals
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R. Terry Bowyer, Vernon C. Bleich, Paula A. White, and Janet L. Rachlow
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conservation ,large mammals ,ecology & behavior ,diseases ,connectivity ,management ,Evolution ,QH359-425 ,Ecology ,QH540-549.5 - Published
- 2024
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31. A qualitative study on retailer experiences with Philadelphia's sweetened beverage tax.
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Hua, Sophia V, Uzwiak, Beth, Hudgins, Anastasia, Peterhans, Ana, Lawman, Hannah G, Bleich, Sara N, Falbe, Jennifer, and Roberto, Christina A
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Public Health ,Health Sciences ,Beverages ,Commerce ,Humans ,Philadelphia ,Sugar-Sweetened Beverages ,Taxes ,Qualitative research ,Beverage tax ,Retailers ,Tax implementation ,Clinical Sciences ,Oncology and Carcinogenesis ,Biomedical and clinical sciences ,Health sciences ,Psychology - Abstract
The Philadelphia Beverage Tax was implemented on January 1, 2017 for some sugar- and artificially-sweetened beverages. Few qualitative studies have assessed retailers' reactions to beverage taxes. We aimed to understand food retailers' knowledge and attitudes about the Philadelphia beverage tax and how they responded to it with the goal of informing the framing and implementation of beverage taxes in other interested jurisdictions. Researchers conducted semi-structured interviews with retailers within Philadelphia before (n = 15) and after (n = 11) the Philadelphia Beverage Tax was implemented. Purposeful sampling was used to recruit participants with different store locations and customer base characteristics. A priori codes based on the interview guide were used to organize data, and analytic memos were developed and reviewed to identify themes that emerged within the data using a grounded theory approach. Five themes emerged: (a) concerns about the tax purpose, amount, and use of revenue; (b) concerns about the tax's impact on finances and business operations; (c) business strategies implemented to lessen financial burden of the tax; (d) perceptions of customer responses to the tax based on income; and (e) confusion around tax implementation. Results highlighted ways to improve implementation. Retailers in Philadelphia implemented various strategies to offset negative effects on taxed beverage sales. Cities implementing a beverage tax would benefit from investment in educational outreach and support to business owners prior to tax implementation and ensure transparency in how tax revenue will be spent.
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- 2022
32. Enhancing Electrocardiogram (ECG) Analysis of Implantable Cardiac Monitor Data: An Efficient Pipeline for Multi-Label Classification
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Amnon Bleich, Antje Linnemann, Benjamin Jaidi, Björn H. Diem, and Tim O. F. Conrad
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ECG ,ICM ,classification ,semi-supervised-learning ,Computer engineering. Computer hardware ,TK7885-7895 - Abstract
Implantable Cardiac Monitor (ICM) devices are demonstrating, as of today, the fastest-growing market for implantable cardiac devices. As such, they are becoming increasingly common in patients for measuring heart electrical activity. ICMs constantly monitor and record a patient’s heart rhythm, and when triggered, send it to a secure server where health care professionals (HCPs) can review it. These devices employ a relatively simplistic rule-based algorithm (due to energy consumption constraints) to make alerts for abnormal heart rhythms. This algorithm is usually parameterized to an over-sensitive mode in order to not miss a case (resulting in a relatively high false-positive rate), and this, combined with the device’s nature of constantly monitoring the heart rhythm and its growing popularity, results in HCPs having to analyze and diagnose an increasingly growing number of data. In order to reduce the load on the latter, automated methods for ECG analysis are nowadays becoming a great tool to assist HCPs in their analysis. While state-of-the-art algorithms are data-driven rather than rule-based, training data for ICMs often consist of specific characteristics that make their analysis unique and particularly challenging. This study presents the challenges and solutions in automatically analyzing ICM data and introduces a method for its classification that outperforms existing methods on such data. It carries this out by combining high-frequency noise detection (which often occurs in ICM data) with a semi-supervised learning pipeline that allows for the re-labeling of training episodes and by using segmentation and dimension-reduction techniques that are robust to morphology variations of the sECG signal (which are typical to ICM data). As a result, it performs better than state-of-the-art techniques on such data with, e.g., an F1 score of 0.51 vs. 0.38 of our baseline state-of-the-art technique in correctly calling atrial fibrillation in ICM data. As such, it could be used in numerous ways, such as aiding HCPs in the analysis of ECGs originating from ICMs by, e.g., suggesting a rhythm type.
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- 2023
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33. Controversies regarding lithium-associated weight gain: case–control study of real-world drug safety data
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Waldemar Greil, Mateo de Bardeci, Bruno Müller-Oerlinghausen, Nadja Nievergelt, Hans Stassen, Gregor Hasler, Andreas Erfurth, Katja Cattapan, Eckart Rüther, Johanna Seifert, Sermin Toto, Stefan Bleich, and Georgios Schoretsanitis
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Weight gain ,Lithium ,Mood stabilizer ,Adverse drug reaction (ADR) ,Case–control study ,Drug safety ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 ,Neurophysiology and neuropsychology ,QP351-495 - Abstract
Abstract Background The impact of long-term lithium treatment on weight gain has been a controversial topic with conflicting evidence. We aim to assess reporting of weight gain associated with lithium and other mood stabilizers compared to lamotrigine which is considered free of metabolic adverse drug reactions (ADRs). Methods We conducted a case/non-case pharmacovigilance study using data from the AMSP project (German: “Arzneimittelsicherheit in der Psychiatrie”; i.e., Drug Safety in Psychiatry), which collects data on ADRs from patients treated in psychiatric hospitals in Germany, Austria, and Switzerland. We performed a disproportionality analysis of reports of weight gain (> 10% of baseline body weight) calculating reporting odds ratio (ROR). We compared aripiprazole, carbamazepine, lithium, olanzapine, quetiapine, risperidone, and valproate to lamotrigine. Additional analyses related to different mood stabilizers as reference medication were performed. We also assessed sex and age distributions of weight-gain reports. Results We identified a total of 527 cases of severe drug-induced weight gain representing 7.4% of all severe ADRs. The ROR for lithium was 2.1 (95%CI 0.9–5.1, p > 0.05), which did not reach statistical significance. Statistically significant disproportionate reporting of weight gain was reported for olanzapine (ROR: 11.5, 95%CI 4.7–28.3, p
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- 2023
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34. Impact of the Philadelphia Beverage Tax on Perceived Beverage Healthfulness, Tax Awareness, and Tax Opinions
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Lowery, Caitlin M., Roberto, Christina A., Hua, Sophia V., Bleich, Sara N., Mitra, Nandita, Lawman, Hannah G., Taillie, Lindsey S., Ng, Shu Wen, and Gibson, Laura A.
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- 2024
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35. Opposing diet, microbiome, and metabolite mechanisms regulate inflammatory bowel disease in a genetically susceptible host
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Pereira, Gabriel Vasconcelos, Boudaud, Marie, Wolter, Mathis, Alexander, Celeste, De Sciscio, Alessandro, Grant, Erica T., Trindade, Bruno Caetano, Pudlo, Nicholas A., Singh, Shaleni, Campbell, Austin, Shan, Mengrou, Zhang, Li, Yang, Qinnan, Willieme, Stéphanie, Kim, Kwi, Denike-Duval, Trisha, Fuentes, Jaime, Bleich, André, Schmidt, Thomas M., Kennedy, Lucy, Lyssiotis, Costas A., Chen, Grace Y., Eaton, Kathryn A., Desai, Mahesh S., and Martens, Eric C.
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- 2024
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36. The significance of cerebrospinal fluid analysis in the differential diagnosis of 564 psychiatric patients: Multiple sclerosis is more common than autoimmune-encephalitis
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Maier, Hannah Benedictine, Stadler, Jan, Deest-Gaubatz, Stephanie, Borlak, Francesca, Türker, Seda Nur, Konen, Franz Felix, Seifert, Johanna, Kesen, Cagla, Frieling, Helge, Bleich, Stefan, Lüdecke, Daniel, Gallinat, Jürgen, Hansen, Niels, Wiltfang, Jens, Skripuletz, Thomas, and Neyazi, Alexandra
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- 2024
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37. Advertising and Stocking at Small Retailers: A Sweetened Beverage Excise Tax in Philadelphia
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Lee, Matthew M., Gibson, Laura A., Hua, Sophia V., Lowery, Caitlin M., Paul, Maiki, Roberto, Christina A., Lawman, Hannah G., Bleich, Sara N., Mitra, Nandita, and Kenney, Erica L.
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- 2024
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38. Commentary : Feral horses, feral asses, and professional politicians: broodings from a beleaguered biologist
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Bleich, Vernon C.
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- 2022
39. Berry Pomace Extracts as a Natural Washing Aid to Mitigate Enterohaemorrhagic E. coli in Fresh Produce
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Kanchan Thapa, Dita Julianingsih, Chuan-Wei Tung, Anna Phan, Muhammad Abrar Hashmi, Kayla Bleich, and Debabrata Biswas
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Enterohaemorrhagic E. coli ,berry pomace extract ,washing solution ,cross contamination ,Chemical technology ,TP1-1185 - Abstract
Enterohemorrhagic Escherichia coli (EHEC) outbreaks have been frequently linked to the consumption of produce. Furthermore, produce grown on organic farms possess a higher risk, as the farmers avoid antibiotics and chemicals. This study sets out to evaluate the effectiveness of advanced postharvest disinfection processes using berry pomace extracts (BPEs) in reducing EHEC load in two common leafy greens, spinach and lettuce. Spinach and lettuce were inoculated with ~5 log CFU/leaf EHEC EDL-933 and then treated with three different concentrations of BPE (1, 1.5, and 2 gallic acid equivalent, GAE mg/mL) for increasing periods of time. After the wash, the bacteria were quantified. Changes in the relative expression of virulence genes and the genes involved in cell division and replication and response against stress/antibiotics were studied. We observed a significant reduction in EHEC EDL933, ranging from 0.5 to 1.6 log CFU/spinach leaf (p < 0.05) washed with BPE water. A similar trend of reduction, ranging from 0.3 to 1.3 log CFU/mL, was observed in pre-inoculated lettuce washed with BPE water. We also quantified the remaining bacterial population in the residual treatment solutions and found the survived bacterial cells (~3 log CFU/mL) were low despite repeated washing with the same solution. In addition, we evaluated the phenolic concentration in leftover BPE, which did not change significantly, even after multiple uses. Alterations in gene expression levels were observed, with downregulation ranging from 1 to 3 log folds in the genes responsible for the adhesion and virulence of EHEC EDL933 and significant upregulation of genes responsible for survival against stress. All other genes were upregulated, ranging from 2 to 7 log folds, with a dose-dependent decrease in expression. This finding shows the potential of BPE to be used for sanitation of fresh produce as a natural and sustainable approach.
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- 2024
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40. Macrophage-Induced Pro-Fibrotic Gene Expression in Tubular Cells after Ischemia/Reperfusion Is Paralleled but Not Directly Mediated by C5a/C5aR1 Signaling
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Erik Bleich, Eva Vonbrunn, Maike Büttner-Herold, Kerstin Amann, and Christoph Daniel
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complement C5a ,macrophage/tubular crosstalk ,fibrosis ,ischemia/reperfusion ,Science - Abstract
Ischemia/reperfusion (I/R) is inevitable during kidney transplantation and causes acute kidney injury (AKI), which affects immediate outcome and leads to chronic changes such as fibrotic remodeling of the graft. We investigated pro-fibrotic signaling after I/R, focusing on the complement component and receptor C5a/C5aR1 and macrophage/tubule crosstalk. Male Dark Agouti rats were subjected to I/R and their kidneys were harvested 10 min, 6 h, 24 h, 3 days, 5 days and 8 weeks after reperfusion. The development of renal fibrosis was assessed by the detection of Vimentin (VIM), α-smooth muscle actin (α-SMA) and collagen by immunohistochemistry and Sirius Red staining, respectively. The characterization of C5a/C5aR1 activity and C5aR1+ cells was performed by multiplex mRNA analysis, ELISA, immunofluorescence flow cytometry and in situ hybridization in animal models and cell culture analyses. In the cell culture experiments, we focused on macrophage/tubule cell crosstalk in co-culture experiments and mimicked in vivo conditions by hypoxia/reoxygenation and supplementation with C5a. Already 6–24 h after the induction of I/R in the rat model, C5a concentration in the plasma was significantly increased compared to the control. The matrix components VIM and α-SMA peaked on day 5 and declined after 8 weeks, when an increase in collagen was detected using Sirius Red. In contrast to early I/R-induced C5a activation, renal C5ar1 expression was maximal at day 5 and C5 expression increased until week 8, indicating that the renal upregulation of expression is not required for early complement activation. C5aR1 mRNA was detected in neutrophils and macrophages, but not in proximal tubular cells in the injured kidneys. The macrophage/tubular cell co-culture experiments showed that macrophages were mainly responsible for the increased expression of fibrosis-associated genes in tubule cells (ACTA2, VIM, SNAI1, TGFB1 and FGF-2), and hypoxia/reoxygenation had a partially enhancing effect. A direct pro-fibrotic effect of C5a was not observed. Increased TGF-ß levels were dependent on the differentiation of macrophages to the M2 subtype. In conclusion, the early activation of mesenchymal markers in tubular epithelial cells leads to long-term fibrotic remodeling characterized by VIM expression and driven by TGF-ß-dependent macrophage/tubular crosstalk. The chemoattractive properties of complement C5a may contribute to the recruitment of pro-fibrotic macrophages.
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- 2024
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41. Depression, Angststörungen, bipolare Störung, Schizophrenie, Aufmerksamkeitsdefizit-/Hyperaktivitätsstörung
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Seifert, Johanna, Bleich, Stefan, Seifert, Roland, Ludwig, Wolf-Dieter, editor, Mühlbauer, Bernd, editor, and Seifert, Roland, editor
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- 2023
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42. Bighorn Sheep and Mountain Goats
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Whiting, Jericho C., Bleich, Vernon C., Bowyer, R. Terry, Manlove, Kezia, White, Kevin, McNew, Lance B., editor, Dahlgren, David K., editor, and Beck, Jeffrey L., editor
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- 2023
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43. Cost Effectiveness of Calorie Labeling at Large Fast-Food Chains Across the U.S.
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Dupuis, Roxanne, Block, Jason P., Barrett, Jessica L., Long, Michael W., Petimar, Joshua, Ward, Zachary J., Kenney, Erica L., Musicus, Aviva A., Cannuscio, Carolyn C., Williams, David R., Bleich, Sara N., and Gortmaker, Steven L.
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- 2024
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44. A systematic scoping review of rodent models of catatonia: Clinical correlations, translation and future approaches
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Mallien, Anne S., Brandwein, Christiane, Vasilescu, Andrei-Nicolae, Leenaars, Cathalijn, Bleich, André, Inta, Dragos, Hirjak, Dusan, and Gass, Peter
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- 2024
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45. Alzheimer’s disease biomarkers in cerebrospinal fluid are stable with the Elecsys immunoassay to most pre-analytical influencing factors except freezing at -80 °C
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Franz Felix Konen, Hannah Benedictine Maier, Alexandra Neyazi, Stefan Bleich, Konstantin Neumann, and Thomas Skripuletz
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Alzheimer´s disease ,Cerebrospinal fluid ,Biomarker ,Amyloid ß1–42 ,Phospho-tau ,Total-tau ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Abstract Background Alzheimer´s disease is considered a neurodegenerative disease and is diagnosed by exclusion, while the detection of specific cerebrospinal fluid (CSF) biomarkers, namely amyloid-beta (Aβ) peptides Aβ1–42 (Aß42), phospho-tau (181P; P-tau), and total-tau (T-tau), has been shown to improve diagnostic accuracy. Recently, a new generation of sample tubes (Sarstedt false-bottom tubes) for the Elecsys CSF immunoassay for the determination of Alzheimer´s disease biomarkers in CSF was introduced, promising better measurability. However, the pre-analytic influencing factors have not yet been sufficiently investigated. Methods In 29 patients without Alzheimer’s disease diagnosis, CSF concentrations of Aß42, P-tau and T-tau were examined in native CSF and after different influencing interventions using the Elecsys immunoassay test method. The following influencing factors were analyzed: contamination with blood (10,000 and 20,000 erythrocytes/µl CSF), 14-day storage at 4 °C, blood contamination of CSF and 14-day storage at 4 °C, 14-day freezing at -80 °C in Sarstedt tubes or glass vials, 3-month intermediate storage at -80 °C in glass vials. Results Both storage at -80 °C for 14 days in Sarstedt false-bottom tubes and in glass vials and storage at -80 °C for 3 months in glass vials resulted in significant decreases in Aß42 (13% after 14 days in Sarstedt and 22% in glass vials, 42% after 3 months in glass vials), P-tau (9% after 14 days in Sarstedt and 13% in glass vials, 12% after 3 months in glass vials) and T-tau (12% after 14 days in Sarstedt and 19% in glass vials, 20% after 3 months in glass vials) concentrations in CSF. No significant differences were found for the other pre-analytical influencing factors. Conclusions Measurements of the concentrations of Aß42, P-tau, and T-tau in CSF with use of the Elecsys immunoassay are robust to the pre-analytical influencing factors of blood contamination and duration of storage. Freezing at -80 °C results in significant reduction of biomarker concentrations regardless of the storage tube and must be considered in retrospective analysis.
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- 2023
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46. Drug safety in older patients with alcohol use disorder: a retrospective cohort study
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Sebastian Schröder, Martin Schulze Westhoff, Tabea Pfister, Johanna Seifert, Stefan Bleich, Felix Koop, Phileas Johannes Proskynitopoulos, Alexander Glahn, and Johannes Heck
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Therapeutics. Pharmacology ,RM1-950 ,Psychiatry ,RC435-571 - Abstract
Background: Older patients with alcohol use disorder are at particular risk of developing adverse drug reactions due to multimorbidity, polypharmacy, and altered organ function. Objectives: In this study, we investigated the frequency and characteristics of potentially serious alcohol–medication interactions, potentially inappropriate medications (PIMs) for older adults, and potential drug–drug interactions (pDDIs) in a population of older patients with alcohol use disorder over a 10-year period. Design: Retrospective monocentric cohort study. Methods: Prescribed medications were screened for potentially serious alcohol–medication interactions, PIMs, and pDDIs using the POSAMINO (POtentially Serious Alcohol–Medication INteractions in Older adults) criteria, the PRISCUS 2.0 list, the FORTA (Fit fOR The Aged) classification, and the drug interaction program AiD Klinik ® . Results: We enrolled 114 patients aged ⩾65 years with alcohol use disorder, who were treated in an addiction unit of a university hospital in Germany. About 80.7% of the study population had at least one potentially serious alcohol–medication interaction. Potentially serious alcohol–medication interactions most commonly affected the cardiovascular (57.7%) and the central nervous system (32.3%). A total of 71.1% of the study population received at least one prescription of a FORTA C or D drug, compared with 42.1% who received at least one PIM prescription according to the PRISCUS 2.0 list. A total of 113 moderate and 72 severe pDDIs were identified in the study population. Conclusion: Older patients with alcohol use disorders are frequently exposed to potentially serious alcohol–medication interactions, PIMs, and pDDIs. Improvements in the quality of prescribing should primarily target the use of cardiovascular and psychotropic drugs.
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- 2024
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47. Supplemental Nutrition Assistance Program issuance timing is associated with sugar-sweetened beverage marketing in the USA
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Jane Dai, Erica L Kenney, Mark J Soto, Anthony Zhong, Alyssa J Moran, Emily M Broad Leib, and Sara N Bleich
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Beverage marketing ,SNAP ,Nutrition policy ,Retail stores ,Public aspects of medicine ,RA1-1270 ,Nutritional diseases. Deficiency diseases ,RC620-627 - Abstract
Abstract Objective: Prior research has shown that there are more supermarket displays of sugar-sweetened beverages (SSB) during times when Supplemental Nutrition Assistance Program (SNAP) benefits are distributed (‘issuance periods’). This may contribute to inequitable purchasing and consumption. This study examines whether SSB marketing in weekly supermarket circulars, which retailers use to advertise products, is more prevalent during issuance periods compared to non-issuance periods. Design: We conducted longitudinal, difference-in-differences analyses of data extracted from weekly supermarket circulars of randomly selected SNAP-authorised retailers in six states. Analyses tested whether SSB advertisements (‘ads’) were more prevalent during SNAP issuance periods compared to non-issuance periods within states with distinct issuance periods (3, 5, 10 or 15 d), compared to one state with continuous benefit issuance (28 d; the ‘control’ state). Setting: Weekly online supermarket circulars collected from August to September 2019 were analysed in 2021. Participants: The study sample included 5152 circulars from 563 SNAP-authorised retailers in the states California, Connecticut, Nebraska, New Jersey and Texas (distinct issuance period states) as well as Florida (‘control’ state). Results: The estimated mean percentage of beverage ads classified as SSB ads during issuance days was 51·5 % compared to 48·4 % during non-issuance days (P < 0·001). In difference-in-differences analyses comparing to the ‘control’ state with continuous issuance, SSB ad counts were 2·9 % higher (95 % CI 1·9 %, 3·9 %) during SNAP issuance relative to non-issuance. Conclusions: SSB ads are slightly more prevalent in weekly supermarket circulars during SNAP issuance periods. Future research should explore the linkages between circular ads and SSB purchasing and consumption.
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- 2024
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48. Potentially inappropriate prescriptions of antibiotics in geriatric psychiatry—a retrospective cohort study
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Tabea Pfister, Sebastian Schröder, Johannes Heck, Stefan Bleich, Tillmann H. C. Krüger, Felix Wedegärtner, Adrian Groh, and Martin Schulze Westhoff
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geriatric psychiatry ,drug safety ,potentially inappropriate medications ,antibiotics ,antibiotic stewardship ,Psychiatry ,RC435-571 - Abstract
IntroductionOlder patients are frequently affected by infectious diseases and adverse drug reactions (ADRs) of consecutively prescribed antibiotics. Particularly within geriatric psychiatry, high rates of potentially inappropriate prescriptions (PIPs) have been described, significantly complicating pharmacological treatment. Therefore, this study aimed to investigate the frequency and characteristics of antibiotic PIPs in geriatric psychiatry.MethodsMedication charts of 139 patient cases (mean age 78.8 years; 69.8% female) receiving antibiotic treatment on a geriatric psychiatric ward were analyzed. Utilizing previously published definitions of antibiotic PIPs, adequacy of the antibiotic prescriptions was subsequently assessed.Results16.3% of all screened patient cases (139/851) received an antibiotic treatment during their inpatient stay. 59.5% of antibiotic prescriptions were due to urinary tract infections, followed by pulmonary (13.3%) and skin and soft tissue infections (11.3%). 46.7% of all antibiotic prescriptions fulfilled at least one PIP criterium, with the prescription of an antibiotic course for more than seven days as the most common PIP (15.3%).DiscussionAntibiotic PIPs can be considered as a frequent phenomenon in geriatric psychiatry. Especially the use of fluoroquinolones and cephalosporins should be discussed critically due to their extensive side effect profiles. Due to the special characteristics of geriatric psychiatric patients, international guidelines on the use of antibiotics should consider frailty and psychotropic polypharmacy of this patient population more closely.
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- 2024
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49. Book Review – Cougars on the Cliff: One Man’s Pioneer Quest to Understand the Mythical Mountain Lion—a Memoir
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Vernon C. Bleich
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Science - Published
- 2023
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50. Bifrontal electroconvulsive therapy leads to improvement of cerebral glucose hypometabolism in frontotemporal dementia with comorbid psychotic depression – a case report
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Sebastian Schröder, Lena Bönig, Phileas Johannes Proskynitopoulos, Eva Janke, Johannes Heck, Nima Mahmoudi, Adrian Groh, Georg Berding, Felix Wedegärtner, Stephanie Deest-Gaubatz, Hannah Benedictine Maier, Stefan Bleich, Helge Frieling, and Martin Schulze Westhoff
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18F-FDG PET/CT ,Frontotemporal dementia ,ECT ,Depression ,Psychiatry ,RC435-571 - Abstract
Abstract Background Differentiating depression and dementia in elderly patients represents a major clinical challenge for psychiatrists. Pharmacological and non-pharmacological treatment options for both conditions are often used cautiously due to fear of adverse effects. If a clinically indicated therapy is not initiated due to fear of adverse effects, the quality of life of affected patients may significantly be reduced. Case presentation Here, we describe the case of a 65-year-old woman who presented to the department of psychiatry of a university hospital with depressed mood, pronounced anxiety, and nihilistic thoughts. While several pharmacological treatments remained without clinical response, further behavioral observation in conjunction with 18F-fluoro‐2‐deoxy‐D‐glucose positron emission tomography/computed tomography (18F-FDG PET/CT) revealed the diagnosis of frontotemporal dementia (FTD). To counter the pharmacological treatment resistance of psychotic depression, we decided to perform electroconvulsive therapy (ECT). Remarkably, ten sessions of ECT yielded an almost complete remission of depressive symptoms. In addition, the patient’s delusional ideas disappeared. A follow-up 18F-FDG PET/CT after the ECT series still showed a frontally and parieto-temporally accentuated hypometabolism, albeit with a clear regression compared to the previous image. The follow-up 18F-FDG PET/CT thus corroborated the diagnosis of FTD, while on the other hand it demonstrated the success of ECT. Conclusions In this case, ECT was a beneficial treatment option for depressive symptoms in FTD. Also, 18F-FDG PET/CT should be discussed as a valuable tool in differentiating depression and dementia and as an indicator of treatment response.
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- 2023
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