Acute multi-level response to defective de novo chromatin assembly in S-phase.

Long-term perturbation of de novo chromatin assembly during DNA replication has profound effects on epigenome maintenance and cell fate. The early mechanistic origin of these defects is unknown. Here, we combine acute degradation of Chromatin Assembly Factor 1 (CAF-1), a key player in de novo chromatin assembly, with single-cell genomics, quantitative proteomics, and live-microscopy to uncover these initiating mechanisms in human cells. CAF-1 loss immediately slows down DNA replication speed and renders nascent DNA hyperaccessible. A rapid cellular response, distinct from canonical DNA damage signaling, is triggered and lowers histone mRNAs. As a result, histone variants usage and their modifications are altered, limiting transcriptional fidelity and delaying chromatin maturation within a single S-phase. This multi-level response induces a cell-cycle arrest after mitosis. Our work reveals the immediate consequences of defective de novo chromatin assembly during DNA replication, explaining how at later times the epigenome and cell fate can be altered.

Autonomy and its relevance for the construction of personhood in dementia- a thematic synthesis.

BACKGROUND: This article examines the concept of autonomy in the context of person-centred dementia research and care, which is frequently being used but not clearly defined. Also, there is no clear conceptual relation between autonomy and personhood in this context. METHODS: Therefore, literature on person-centred dementia research and care was examined to answer the following question: How is the concept of autonomy discussed in person-centred dementia research and care literature? RESULTS: This analysis revealed heterogeneous perspectives on autonomy within the context of dementia. These were assigned to two different perspectives on personhood: one that links personhood to the existing cognitive abilities and the other one, that understands personhood relationally as the result of a socially constructed process. These results are discussed with regard to a nursing and care practice that could be considered as being deficit-oriented, but also with regard to the concept of social health in dementia. CONCLUSIONS: Derived from this analysis, there is a clear need for general conceptual sensitivity in this field. Also, an in-depth examination of the social constructionist approach to personhood in the context of dementia is warranted.

[Do guidelines for care practice address the stability of home-based care arrangements for people with dementia?-A document analysis]. / Adressieren Handlungsempfehlungen der Versorgungspraxis die Stabilität von häuslichen Versorgungsarrangements von Menschen mit Demenz? ­ Eine Dokumentenanalyse.

BACKGROUND: The care of people with dementia (PwD) living at home is mainly provided by family carers who intend to maintain care at home for as long as possible. In the DZNE-SoCA project, a middle range theory of stability of home-based care arrangements for people living with dementia (SoCA-Dem theory) has been developed. The theory helps to understand the complex phenomenon of stability, provides a theoretical framework that can guide future research and can be used for the (further) development of home care structures. AIM: The aim of this substudy of the SoCA project was to examine whether the SoCA-Dem theory can guide German health and social care practice in dealing with family carers of PwD. MATERIAL AND METHODS: The two guidelines for healthcare professionals, the concept of the Centre for Quality in Care (ZQP) "Quality framework for counselling in care" and the DEGAM guidelines for general practitioners "Family carers of adults", were evaluated using a content analysis with respect to the SoCA-Dem theory. RESULTS: Most concepts that constitute stability are addressed in both guidelines. The SoCA-Dem theory illustrates the importance of the interaction between the different concepts for the stability of home-based care arrangements. In the guidelines, the dynamic interplay remains unclear. CONCLUSION: The SoCA-Dem theory seems to be compatible with the German health care context and can support a future shift from a stress-oriented view of giving care to a more comprehensive one.

Dyadic relationship, carer role, and resources: a theory-driven thematic analysis of interviews with informal carers focusing on the stability of home-based care arrangements for people living with dementia.

BACKGROUND: Most people with dementia live at home and are supported by informal carers. During the care trajectory, the creation of a stable care situation is a guiding principle of informal carers, who often manage complex care arrangements. A recently developed theory - 'Stability of home-based care arrangements for people living with dementia' (SoCA-Dem) - conceptualises how such care arrangements develop over time, and it highlights the relevance of the dyadic relationship, carer role, and resources with regard to the continuation of home-based care throughout the course of dementia. To further explore these three concepts, and to provide feedback for a further refinement of SoCA-Dem theory, this study aims to gain a deeper understanding of (1) how informal carers perceive their dyadic relationship, their carer role, and the resources of the care arrangement, and (2) how these concepts are interrelated. METHODS: This study was a secondary data analysis of n = 11 problem-centred interviews. Data were interpreted by a thematic qualitative text analysis. RESULTS: The findings distinguished subthemes within the concepts and uncovered their interrelations. The kinship relation, living situation and character of the dyadic relationship shaped informal carers' self-conception of the carer role. This influenced the integration of resources into the care arrangement. Conversely, the quantity and quality of informal and formal support resulted in a feeling of relief or overload in the carer role, that shaped the informal carers' way of living their dyadic relationship. The respective forming of the concepts had a significant impact with regard to the perceived stability or instability of the care situation in the examined care arrangements. CONCLUSIONS: This study provided valuable evidence for future research alignment and targeted refinement of the SoCA-Dem theory. Scholars should further explore the specifics of spousal versus parent-child-dyads to better understand the dyads' diverse strategies in the creation of stable home-based care arrangements. Furthermore, future research should focus on the complex dynamics of dyads, family networks, and service providers, and all actors' perspectives should be integrated in SoCA-Dem theory. Based on this growing knowledge base, innovative care interventions and structures should be developed to support people with dementia and their informal carers in better living and caring in the place of their choice.

Differences and commonalities of home-based care arrangements for persons living with dementia in Germany - a theory-driven development of types using multiple correspondence analysis and hierarchical cluster analysis.

BACKGROUND: Most persons with dementia live at home and want to stay there as long as possible. In most cases, informal carers such as spouses or children care for them. Together with other family members and professional carers, they form care arrangements to address the complex needs of persons with dementia. One major aim of informal carers is to keep the care arrangement stable. The middle-range theory of 'stability of home-based care arrangements for people living with dementia' (SoCA-Dem theory) offers a theory to understand what constitutes and influences the stability of home-based care arrangements. Based on this theory, the aim of this study was to (1) uncover the underlying structures of differences and commonalities of home-based care arrangements for persons living with dementia, (2) construct types of these care arrangements, and (3) compare these types with regard to their stability. METHOD: This is a secondary analysis of data from a convenience sample of n = 320 care arrangements for persons with dementia obtained in the observational DemNet-D study. Data were analysed using multiple correspondence analysis and hierarchical cluster analysis. Sociodemographic data and variables related to the structure of the care arrangement (D-IVA), burden of the informal carer (BICS-D), dementia severity (FAST), and quality of life of the person with dementia (QOL-AD) were included. RESULTS: The multiple correspondence analysis identified 27 axes that explained the entire variance between all care arrangements. The two axes 'dementia and care trajectory' and 'structure of the dyadic relationship' best distinguished care arrangements from each other and together explained 27.10% of the variance. The subsequent cluster analysis identified four types of care arrangements. Two types included spouse-centred care arrangements, and two types included child-centred care arrangements at different phases of the dementia and care trajectory. The types differ with regard to their stability. CONCLUSION: The results highlight the heterogeneity and commonality of care arrangements for persons living with dementia. They contribute to a better understanding of informal dementia home care. Furthermore, the results can guide the development of tailored support for persons living with dementia and their caring families.

Sociodemographic aspects and health care-related outcomes: a latent class analysis of informal dementia care dyads.

BACKGROUND: Studies revealed the importance to assess dementia care dyads, composed of persons with dementia and their primary informal caregivers, in a differentiated way and to tailor support services to particular living and care circumstances. Therefore, this study aims first to identify classes of dementia care dyads that differ according to sociodemographic, care-related and dementia-specific characteristics and second, to compare these classes with regard to healthcare-related outcomes. METHODS: We used data from the cross-sectional German DemNet-D study (n = 551) and conducted a latent class analysis to investigate different classes of dementia care dyads. In addition, we compared these classes with regard to the use of health care services, caregiver burden (BIZA-D), general health of the informal caregiver (EQ-VAS) as well as quality of life (QoL-AD) and social participation (SACA) of the person with dementia. Furthermore, we compared the stability of the home-based care arrangements. RESULTS: Six different classes of dementia care dyads were identified, based on best Bayesian Information Criterion (BIC), significant likelihood ratio test (p <  0.001), high entropy (0.87) and substantive interpretability. Classes were labelled as "adult child parent relationship & younger informal caregiver", "adult child parent relationship & middle aged informal caregiver", "non family relationship & younger informal caregiver", "couple & male informal caregiver of older age", "couple & female informal caregiver of older age", "couple & younger informal caregiver". The classes showed significant differences regarding health care service use. Caregiver burden, quality of life of the person with dementia and stability of the care arrangement differed also significantly between the classes. CONCLUSION: Based on a latent class analysis this study indicates differences between classes of informal dementia care dyads. The findings may give direction for better tailoring of support services to particular circumstances to improve healthcare-related outcomes of persons with dementia and informal caregivers.

An energetic meet-and-greet: Molecular chaperones in the histone supply and deposition pathways.

In this issue of Molecular Cell, Hammond et al. (2021) and Piette et al. (2021) identify the essential heat shock co-chaperone DNAJC9 as a new bona fide histone chaperone, linking ATP-dependent molecular chaperones to the histone supply and deposition pathways.

Towards a middle-range theory of 'Stability of home-based care arrangements for people living with dementia' (SoCA-Dem): findings from a meta-study on mixed research.

BACKGROUND: Most people with dementia and their informal carers live at home and strive to create a stable care situation for as long as possible. This preference of dyads is consistent with the global policy of ageing in place. Therefore, we aimed to develop a middle-range theory of stability guided by two research questions: How is stability of home-based care arrangements for people living with dementia constituted? What are the essential factors influencing stability? METHODS: Within the 'Stability of home-based care arrangements for people living with dementia' project (SoCA project) at the German Center for Neurodegenerative Diseases (DZNE), we conducted a meta-study on mixed research. The analytical steps of meta-data analysis, meta-method and meta-theory are merged in an integrative synthesis. Eligible publications were identified through systematic database searches (MEDLINE, CINAHL and PsycINFO; last searched on 3 January 2017), backward/forward citation tracking and snowballing. All publications were screened against predefined inclusion criteria and evaluated through a quality appraisal. The analytical approach was thematic synthesis. RESULTS: 99 publications were included. The middle-range theory conceptualises stability as a complex phenomenon comprising three components including eight concepts that are dynamically inter-related. The conceptual model visualises: (1) the trajectory of the dementia care arrangement, which involves a cyclic process of change and balancing over time; (2) the characteristics of the care arrangement, including needs, the carer role, the dyadic relationship and resources; and (3) the context, which is determined by society and culture and the respective healthcare system. The relevance of each concept in relation to stability changes over time. The forming of each concept is actively shaped by the informal carer. DISCUSSION: This middle-range theory provides a thorough understanding of the stability of home-based care arrangements for people living with dementia and can be used to guide future research and practice. OTHER: This meta-study was funded by the DZNE and registered in PROSPERO (registration number CRD42016041727).

Co-targeting bromodomain and extra-terminal proteins and MCL1 induces synergistic cell death in melanoma.

The treatment of melanoma has been markedly improved by the introduction of targeted therapies and checkpoint blockade immunotherapy. Unfortunately, resistance to these therapies remains a limitation. Novel anticancer therapeutics targeting the MCL1 anti-apoptotic protein have shown impressive responses in haematological cancers but are yet to be evaluated in melanoma. To assess the sensitivity of melanoma to new MCL1 inhibitors, we measured the response of 51 melanoma cell lines to the novel MCL1 inhibitor, S63845. Additionally, we assessed combination of this drug with inhibitors of the bromodomain and extra-terminal (BET) protein family of epigenetic readers, which we postulated would assist MCL1 inhibition by downregulating anti-apoptotic targets regulated by NF-kB such as BCLXL, BCL2A1 and XIAP, and by upregulating pro-apoptotic proteins including BIM and NOXA. Only 14% of melanoma cell lines showed sensitivity to S63845, however, combination of S63845 and I-BET151 induced highly synergistic apoptotic cell death in all melanoma lines tested and in an in vivo xenograft model. Cell death was dependent on caspases and BAX/BAK. Although the combination of drugs increased the BH3-only protein, BIM, and downregulated anti-apoptotic proteins such as BCL2A1, the importance of these proteins in inducing cell death varied between cell lines. ABT-199 or ABT-263 inhibitors against BCL2 or BCL2 and BCLXL, respectively, induced further cell death when combined with S63845 and I-BET151. The combination of MCL1 and BET inhibition appears to be a promising therapeutic approach for metastatic melanoma, and presents opportunities to add further BCL2 family inhibitors to overcome treatment resistance.

Stability of home-based care arrangements for people living with dementia: protocol of a meta-study on mixed research.

INTRODUCTION: Worldwide, most people with dementia live at home and are cared for by informal carers. During the dementia care trajectory, creating and maintaining a stable care situation is a guiding principle of informal carers and a desirable outcome of contemporary healthcare policies. However, though there is an extensive body of research focusing on the course of dementia care trajectories, it remains unclear how stability of home-based care arrangements is constituted and what are the essential factors that influence this stability. This paper outlines a protocol of a systematic review that aims to address these gaps in knowledge. METHODS AND ANALYSIS: To theorise the complex phenomenon of stability of home-based care arrangements for people with dementia, we will conduct a meta-study. Meta-studies include three analytical components (meta-data analysis, meta-method and meta-theory) that are combined and finally culminate in an integrative knowledge synthesis. Originally, meta-study was designed to include qualitative studies only. To capture relevant contributions to our target phenomenon from all types of evidence, we will extend the original methodology and apply it to studies with qualitative, quantitative and mixed-methods designs and to (systematic) reviews. Eligible studies will be identified by systematic database searches (PubMed, CINAHL and PsycINFO), backward/forward citation tracking, snowballing and theoretical sampling. All identified studies will be screened against predefined inclusion criteria. The main analytical approach for all analyses is thematic synthesis. The meta-study will generate a more comprehensive understanding of dementia care trajectories and will be used to identify research gaps, develop future research questions and define relevant outcomes. DISSEMINATION: The findings of the meta-study will be published in a series of articles in peer-reviewed scientific journals and will be presented at national and international scientific conferences. PROSPERO REGISTRATION NUMBER: CRD42016041727.

Iatrogenic Catheter-Induced Acute Aortic Dissection Type A after Coronary Angiography-A Retrospective Consecutive Case Series.

Background Acute aortic dissection type A (AADA) is one of the most life-threatening situations and surgical demanding procedures even today. Usually AADA develops spontaneously, but it can be related also to interventional procedures. Methods We analyzed the data of 14 patients surgically treated in our institution with catheter-induced AADA (ciAADA) during coronary angiography between January 2004 and December 2014. Data were compared with overall AADA patients in this time period (n = 288). Results Nine of the 14 patients were female. Subjects were significantly older compared to the AADA patients (69 ± 11 vs. 62 ± 11; p = 0.021). At admission, ciAADA patients were more often hemodynamically instable and mechanically ventilated. Twelve patients underwent replacement of the ascending aorta and two patients received a modified Bentall operation. Cardiopulmonary bypass time (210 ± 92 vs. 172 ± 51 min) and cross-clamp time (122 ± 63 vs. 92 ± 40 min) were significantly longer due to additional coronary artery bypass grafts in 71.4 versus 3.1% due to myocardial ischemia. Operative mortality (7.1 vs. 2.1%, p = 0.29) and 30-day mortality (50.0 vs. 10.7%, p < 0.001) were higher in the ciAADA group. Conclusion Coronary angiography-induced AADA is a rare but severe complication. Due to additional myocardial ischemia and preoperative hemodynamic instability, patients with ciAADA have adverse outcome compared to overall AADA patients.

[Stability of home based care arrangements for people with dementia : Development of a consensus definition of stability using expert focus groups]. / Stabilität von häuslichen Versorgungsarrangements für Menschen mit Demenz : Entwicklung und Konsentierung einer Definition von Stabilität durch Expertenfokusgruppen.

BACKGROUND: The majority of people with dementia in Germany live at home. These informal care arrangements, which are mostly coordinated by informal carers, are the backbone of home-based dementia care. Creating and maintaining stability is an underlying theme in informal care; however, a definition of the complex phenomenon of 'stability' in this context is still lacking. AIM: The aim was to develop a working definition of stability of home-based care arrangements for people with dementia, which can be applied in current and future research projects at the German Center for Neurodegenerative Diseases in Witten (DZNE Witten) and others. MATERIAL AND METHODS: Ensuing from prior research a preliminary version of the definition was formulated. This definition was discussed in a focus group of scientific experts with expertise in dementia research and care (n = 8). After data analysis using content analysis, the definition was revised during a scientific colloquium (n = 18) and a consensus was finally reached. RESULTS: There were four major themes which were considered by the experts as being relevant for the definition of stability: (1) creating and maintaining stability as a continuous adaptation process, (2) a qualitative component of stability, (3) persons with dementia and informal carers as pivotal players and (4) transitions to residential care. CONCLUSION: The working definition introduced in this article reflects the authors' understanding of the phenomenon of stability of home-based care arrangements for people with dementia. In times of increasing need for evidence-based interventions it is necessary to develop elaborated definitions of complex phenomena in order to be able to systematically evaluate the efficacy of interventions on the basis of a common understanding.