Publications by authors named "Michaela Defrancesco"

Background: Disease-modifying therapies with amyloid-antibodies will soon be available for patients with early Alzheimer's disease, which necessitates diagnostic and therapeutic resources in hospital and outpatient settings.

Methods: The Austrian Alzheimer Society developed an online questionnaire to survey Austrian hospital-based departments of neurology and psychiatry regarding resources for amyloid-antibody therapies.

Results: Between May and October 2023, 30 out of 41 neurology (73%) and 12 out of 33 psychiatry departments (36%) responded.

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Objectives: There is evidence that periodontitis can enhance the progression of Alzheimer's disease (AD). The biomarkers beta-amyloid (40 and 42), total tau, and phospho-tau181 (pTau181) in cerebrospinal fluid help to diagnose AD. Saliva is an easy-to-collect fluid and we aim to analyze these biomarkers in patients with periodontitis.

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Biological aging drives cellular dysfunction and human disease, yet studying human-specific aging dynamics remains challenging due to limited experimental platforms. Here we show that long-term post-mitotic culture of human fibroblasts authentically recapitulates and accelerates in-vivo aging signatures. Longitudinal paired transcriptomic-epigenetic analyses revealed that in-vitro aging mirrors in-vivo primary fibroblasts aging, with concordant transcriptional aging pathways and accelerated epigenetic clock aging patterns.

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Background: The increasing prevalence of dementia and new therapeutic developments for Alzheimer's disease (AD) have created an urgent need for rapid and cost-effective methods to diagnose those affected in the early stages of the disease. Unlike emergency departments, memory clinics lack triage systems, e.g.

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Article Synopsis
  • - The study investigates the urgent need for effective ways to diagnose and track Alzheimer’s disease (AD) by focusing on memory issues and brain changes, particularly in those with mild to moderate AD dementia (ADD).
  • - Researchers followed 104 ADD patients over several years using MRI scans and cognitive tests to analyze brain structure and cognitive decline, finding a strong link between gray matter loss in the temporal lobe and difficulties with word learning.
  • - The findings indicate that certain brain atrophy patterns, specifically in the temporal lobe, combined with specific cognitive test deficits, could help predict quicker cognitive decline in AD patients.
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Background: Mild cognitive impairment (MCI) confers a high annual risk of 10-15 % of conversion to Alzheimer's disease (AD) dementia. MRI atrophy patterns derived from automated ROI analysis, particularly hippocampal subfield volumes, were reported to be useful in diagnosing early clinical stages of Alzheimer's disease.

Objective: The aim of the present study was to combine automated ROI MRI morphometry of hippocampal subfield volumes and cortical thickness estimates using FreeSurfer 6.

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Article Synopsis
  • - The study evaluated the real-world applicability of lecanemab, a newly FDA-approved monoclonal antibody for Alzheimer's-related dementia, by analyzing data from a memory clinic between January 2022 and July 2023.
  • - Out of 587 out-patients, only 4.3% with dementia and 1.5% with mild cognitive impairment (MCI) qualified for lecanemab treatment based on its eligibility criteria, while a notable percentage of others lacked necessary amyloid status.
  • - Findings indicate that despite having a specialized clinic dedicated to dementia diagnostics, the majority of patients do not qualify for lecanemab, highlighting challenges in applying clinical trial criteria to real-world populations.
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Alzheimer's disease (AD) imposes a major burden on affected individuals, their caregivers and health-care systems alike. Though quite many risk factors for disease progression have been identified, there is a lack of prospective studies investigating the interplay and predictive value of a wide variety of patient variables associated with cognitive deterioration (defined as key feature of AD progression). Study participants were patients with probable and possible AD, that were assessed at four time points over a period of two years (T1-T4).

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Introduction: A high burden and many negative outcomes for older people were associated with the COVID-19 pandemic. Social isolation and loneliness are prevalent health problems impacting well-being and quality of life and may have increased due to pandemic-related restrictions. Methods: This study investigate the influence of the COVID-19 pandemic on loneliness in people visiting a mem40ory clinic between March 2020 and September 2022.

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Study Objectives: Sleep is altered early in neurodegenerative diseases (NDDs) and may contribute to neurodegeneration. Long-term, large sample-size studies assessing NDDs association with objective sleep measures are scant. We aimed to investigate whether video-polysomnography (v-PSG)-based sleep features are associated with long-term NDDs incidence.

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Background: The COVID-19 pandemic was associated with high mortality and negative consequences for patients with Alzheimer's disease or dementia and their caregivers. Memory clinics play an important role in enabling early dementia diagnosis and providing support for patients and their caregivers.

Objective: This study investigates the impact of the COVID-19 pandemic and its restrictions on patients of a memory clinic and their caregivers between March 2020 and March 2021.

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Article Synopsis
  • C9orf72 repeat expansions are linked to neurodegenerative disorders, with unclear thresholds distinguishing normal from pathogenic variants.
  • In a study of 1804 patients and 643 healthy individuals in Austria, the presence of C9orf72 repeat expansions was found in 3.4% of frontotemporal dementia and 0.8% of Alzheimer's disease cases, with carriers experiencing earlier disease onset.
  • Intermediate C9orf72 alleles were associated with specific symptoms, like cerebellar issues and sensory deficits, suggesting they may influence the clinical presentation of dementia.
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Alzheimer's disease (AD) is a severe neurodegenerative brain disorder. The determination of beta-amyloid (Aβ)-40, -42, total tau, and phospho-tau-181 (pTau181) in cerebrospinal fluid (CSF) using Lumipulse technology has been established as biomarkers for AD in recent years. As CSF collection is an invasive procedure, one aims to find biomarkers in blood or other human fluids, such as saliva.

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Common knowledge implies that individuals engaging in outdoor sports and especially in regular and extreme mountaineering are exceptionally healthy and hardened. Physical activity in outdoor environments has a positive effect on physical and mental health. However, regular and/or extreme mountaineering might share similarities with behavioural addictions and could thus also have a negative impact on health.

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Article Synopsis
  • - The study explores converting adult human skin fibroblasts (FBs) into induced neurons (iNs) without using Noggin, aiming to make the process more efficient and cost-effective for disease modeling purposes.
  • - Researchers focused on the transforming growth factor-β signaling pathway, identifying ALK2 as a key player in the fibroblast-to-neuron transition and tested the selective ALK2-inhibitor, DMH1, as a potential alternative to Noggin.
  • - Results showed that using DMH1 improved conversion efficiencies and produced high-quality iNs with essential neuronal features, yielding similar outcomes to those achieved with Noggin but at a significantly reduced cost.
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Congenital hyperinsulinemic hypoglycemia (HH) is the most frequent cause of persistent and recurrent hypoglycemia. Peripheral mononuclear blood cells (PBMCs) from a patient diagnosed with HH, alongside autism-spectrum-disorder (ASD), carrying a heterozygous c.812 T>A (L271H) mutation in the voltage-gated calcium channel subunit Ca1.

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Decreased cognitive performance is a hallmark of brain aging, but the underlying mechanisms and potential therapeutic avenues remain poorly understood. Recent studies have revealed health-protective and lifespan-extending effects of dietary spermidine, a natural autophagy-promoting polyamine. Here, we show that dietary spermidine passes the blood-brain barrier in mice and increases hippocampal eIF5A hypusination and mitochondrial function.

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Objectives: In clinical practice it is important to identify patients suffering from mild cognitive impairment (MCI) who will progress to Alzheimer's disease (AD). The purpose of this study is to investigate whether lipid metabolites and vitamin B12 and folate levels are effective biomarker for an accurate prediction of MCI-to-AD conversion.

Methods: During the standard diagnostic assessment at our memory clinic 48 cognitively healthy subjects and MCI patients were recruited.

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Older adults are particularly affected by the current COVID-19 (SARS-CoV-2) pandemic. The risk of dying from COVID-19 increases with age and is often associated with pre-existing health conditions. Globally, more than 50 million-in Austria currently approximately 140,000 people-suffer from dementia.

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Alzheimer's Dementia (AD) is a devastating neurodegenerative disease that affects approximately 17% of people aged 75-84. Neuropsychiatric symptoms (NPS) such as delusions, agitation, anxiety, and hallucinations are present in up to 95% of patients in all stages of dementia. To date, any approved and effective pharmacological interventions for the treatment of NPS are still not available.

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Background: Neuropsychiatric symptoms (NPS) occur frequently in the course of Alzheimer's disease (AD) and are suspected to be associated with a faster dementia progression. Numerous reports have defined specific subsyndromes, summarized in clusters of items of the Neuropsychiatric Inventory (NPI).

Objective: This study investigated the influence of specific NPI subsyndromes and clinical patient characteristics on dementia progression.

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Article Synopsis
  • The study investigates caregiver burden (CB) among individuals caring for dementia patients, highlighting the varied methodological approaches and inconsistent results in existing research.
  • It includes a multicenter longitudinal analysis of 585 caregivers, primarily of Alzheimer's patients, assessing factors like dementia severity, neuropsychiatric symptoms, and caregiver demographics using the Zarit Caregiver Burden Interview.
  • Results indicate that caregiver burden increases over time, with significant correlations found between CB and patient-related determinants, leading to a call for enhanced support and resources for caregivers, particularly addressing the need for more male participation.
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Introduction: Depression in old age is associated with functional disabilities, cognitive impairment, lower self-rated quality of life, and increased mortality. The aim of the study was to reveal the prevalence of depression and to investigate the characteristics of patients treated with antidepressants.

Methods: We analyzed data from the Bruneck Study 2010.

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Alzheimer´s disease (AD) is a severe neurodegenerative brain disorder characterized by beta-amyloid plaques, Tau pathology, inflammation, neurodegeneration, and cerebrovascular dysfunction. Besides that, alterations in monocytes and platelets have been reported in the blood of Alzheimer patients. In the present study, we measured circulating levels of platelet-monocyte aggregates in EDTA blood of cognitively healthy participants and 40 AD patients, and examined their changes induced by stimulation with beta-amyloid peptides.

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Background: Mild cognitive impairment (MCI) has been suggested to represent a prodromal stage of dementia and to confer a high risk for conversion to dementia Alzheimer's type (DAT).

Objectives: In this study, we examined the predictive value of depressive symptoms and neuropsychological variables on conversion of MCI to DAT.

Methods: Neuropsychological and clinical follow-up data of 260 MCI patients seen at the Psychiatric Memory Clinic of the Medical University of Innsbruck between 2005 and 2015 were analyzed retrospectively.

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