TBK1 haploinsufficiency results in changes in the K63-ubiquitination profiles in brain and fibroblasts from affected and presymptomatic mutation carriers

Background Frontotemporal dementia (FTD) is a neurodegenerative disease, resulting in progressive problems in language and/or behaviour and is often diagnosed before 65 years of age. Ubiquitin positive protein aggregates in the brain are among the key pathologic hallmarks of frontotemporal lobar degeneration (FTLD) postmortem. The TANK-binding kinase 1 gene (TBK1) is on the list of genes that can contribute to the development of FTD as well as the related neurodegenerative disease amyotrophic lateral sclerosis (ALS). Methods In this study, using an array of clinical and neuropathological data combined with biochemical and proteomics assays, we analyze the TBK1 splice-mutation (c.1340 + 1G > A) in a Swedish family with a history of FTD and ALS. We also explore the K63 ubiquitination landscape in post-mortem brain tissue and fibroblast cultures. Results The intronic (c.1340 + 1G > A) mutation in TBK1 results in haploinsufficiency and affects the activity of the protein in symptomatic and pre-symptomatic mutation carriers. Conclusion Our results suggest that the mutation leads to a significant reduction of TBK1 activity and induce alterations in K63 ubiquitination profile of the cell already in the presymptomatic stages.

Swedish family care advisors’ views on existential loneliness and existential support to informal caregivers of older people: A cross-sectional national survey

The number of older people needing care is increasing, and care is often provided by informal caregivers. The mission of family care advisors (FCAs) is to provide them with support; however, whether and how support in existential matters such as existential loneliness is provided is unclear. Therefore, the aim of this study was to describe FCAs’ views on existential loneliness, and existential support provided to relatives who act as informal caregivers to older people. A national survey was distributed to 349 FCAs in Sweden, response rate n = 120 (36%). The STROBE checklist was followed when presenting the study. Existential loneliness was viewed as thoughts about life and meaning (78%). Existential support was provided by dialogues (87%), visits (75%) and support groups (73%); 45% of FCAs stated that they had time to provide existential support and 27% reported having knowledge of how to encounter existential loneliness. FCAs provide existential support, but often lack experience, knowledge and time. Time and knowledge are important prerequisites for acknowledging existential needs.