Publications by authors named "Petri S"

Amyotrophic Lateral Sclerosis (ALS) is a devastating neurodegenerative disease characterized by the degeneration of upper and lower motoneurons. The four most frequently mutated genes causing familial ALS (fALS) are C9orf72, FUS, SOD1, and TARDBP. Some of the related wild-type proteins comprise intrinsically disordered regions (IDRs) which favor their assembly in liquid droplets-the biophysical mechanism behind the formation of physiological granules such as stress granules (SGs).

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In patients with amyotrophic lateral sclerosis (ALS), mechanical insufflation-exsufflation (MI-E) addresses cough deficiency to achieve major therapeutic goals: improving costal muscle and joint function, reducing atelectasis through insufflation, and clearing bronchial secretions via exsufflation. Despite its perceived benefits, there is limited systematic research on MI-E provision, symptom alleviation, or patient satisfaction. The research platform Ambulanzpartner coordinated this longitudinal observational study conducted in 12 German ALS centers from July 2018 to September 2023.

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Objective: To investigate self-assessment of the amyotrophic lateral sclerosis functional rating scale-revised (ALSFRS-R) using the patient's smartphone and to analyze non-inferiority to clinic assessment.

Methods: In an observational study, ALSFRS-R data being remotely collected on a mobile application (App-ALSFRS-R) were compared to ALSFRS-R captured during clinic visits (clinic-ALSFRS-R). ALS progression rate (ALSPR)-as calculated by the monthly decline of ALSFRS-R-and its intrasubject variability (ALSPR-ISV) between ratings were used to compare both cohorts.

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Background And Objectives: The availability of disease-modifying therapies for 5q-associated spinal muscular atrophy (SMA) has heightened the need to identify suitable biomarkers. This study investigates neurofilament light chain (NfL) concentrations during long-term nusinersen treatment in adult SMA.

Methods: In a retrospective study of prospectively collected data, NfL concentrations in the CSF (cNfL) and serum (sNfL) were measured in patients with SMA from 8 German centers and in neurologic controls using a single-molecule array (Simoa) assay.

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Background: In amyotrophic lateral sclerosis (ALS), neurofilament light chain (NfL) was introduced as a prognostic biomarker. More recently, NfL values can be shared on the patient's ALS app. Also, the ALS functional rating scale (ALSFRS-R) is an established patient-reported assessment of disease progression.

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Acute care of patients in the emergency department (ED) can be very challenging when patients attend EDs without their important medical information. This is especially problematic for multimorbid patients under polypharmacy. The aim of this study was to assess systematically the frequency and clinical relevance of incomplete medical data upon ED admission.

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Increasing evidence suggests an essential function for autophagy in unconventional protein secretion (UPS). However, despite its relevance for the secretion of aggregate-prone proteins, the mechanisms of secretory autophagy in neurons have remained elusive. Here we show that the lower motoneuron disease-associated guanine exchange factor Plekhg5 drives the UPS of Sod1.

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Article Synopsis
  • The study examines the link between high-amplitude quasi-stationary atmospheric Rossby waves and extreme summer weather in the Northern Hemisphere, focusing on the phenomenon of quasi-resonant amplification (QRA).
  • Using a semi-empirical approach and data from climate models (CMIP5 and CMIP6), the authors project a significant increase in QRA events, with 85% of CMIP6 models showing a positive trend compared to 60% in CMIP5.
  • The findings indicate that with continued anthropogenic warming and under various emission scenarios, QRA events—and related summer extremes—are likely to increase more than previously estimated, suggesting a concerning future for weather patterns.
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  • A study was conducted at 11 ALS centers in Germany from October 2021 to February 2024 to evaluate the frequency of pathogenic gene variants in ALS patients and their transition to an expanded access program for tofersen treatment.
  • Out of 1935 patients screened, 48.8% chose to be informed about genetic variants related to tofersen, revealing that 1.8% had (likely) pathogenic variants, 0.9% had other pathogenic variants, and 7.0% showed hexanucleotide repeat expansion.
  • The transition to tofersen treatment from genetic testing averaged 94 days, with a notable 74.0% of patients with certain variants opting for the therapy, highlighting the importance of comprehensive
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The degenerative motor neuron disorder amyotrophic lateral sclerosis (ALS) frequently leads bulbar symptoms like dysarthria, dysphagia, and sialorrhea, in approximately one-third of cases being the initial symptom. Throughout the disease, more than two-thirds of ALS patients experience dysphagia, regardless of the region of onset. In this review, we aimed to offer an updated overview of dysphagia and sialorrhea in ALS, covering its diagnosis, monitoring, and treatment in clinical practice.

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Objective: Robotic arms are innovative assistive devices for ALS patients with progressive motor deficits of arms and hands. The objective was to explore the patients´ expectations towards a robotic arm system and to assess the actual experiences after the provision of the device.

Methods: A prospective observational study was conducted at 9 ALS centers in Germany.

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Article Synopsis
  • Pathogenic variants in the SOD1 gene are found in about 2% of sporadic and 11% of familial ALS cases in Europe, with a focus on three main variants (R116G, D91A, L145F) in a study of 83 patients in Germany.
  • Patients with the R116G variant experienced the most severe disease progression, with a median survival of just 22 months, significantly shorter than those with D91A (198 months) and L145F (87 months).
  • All patients treated with tofersen showed reduced neurofilament light chain levels in their serum, indicating a potential treatment benefit, regardless of their specific SOD1 variant.
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Article Synopsis
  • This multicenter study evaluated tofersen treatment for patients with SOD1-ALS, focusing on clinical outcomes and patient-reported outcomes (PRO) after at least 6 months of treatment.
  • Results showed a 25% reduction in ALS progression rate, stable lung capacity, and a significant decrease in serum neurofilament light chain levels, indicating a positive response to the drug.
  • Patients reported high satisfaction with tofersen treatment, showing improved symptom severity and a strong willingness to recommend the drug to others.
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Background: More responsive, reliable, and clinically valid endpoints of disability are essential to reduce size, duration, and burden of clinical trials in adult persons with spinal muscular atrophy (aPwSMA).

Objective: The aim is to investigate the feasibility of smartphone-based assessments in aPwSMA and provide evidence on the reliability and construct validity of sensor-derived measures (SDMs) of mobility and manual dexterity collected remotely in aPwSMA.

Methods: Data were collected from 59 aPwSMA (23 walkers, 20 sitters and 16 non-sitters) and 30 age-matched healthy controls (HC).

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Introduction: Amyotrophic lateral sclerosis (ALS) is an inevitably fatal condition that leads to a progressive loss of physical functioning, which results in a high psychosocial burden and organizational challenges related to medical care. Multidimensional and multiprofessional care is advised to meet the complex needs of patients and their families. Many healthcare systems, including Germany, may not be able to meet these needs because non-medical services such as psychological support or social counselling are not regularly included in the care of patients with ALS (pwALS).

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  • The study investigated the prevalence of metabolic syndrome (MetS) in adults with spinal muscular atrophy (SMA) and its impact on motor function, quality of life (QoL), fatigue, and depression.
  • About 25% of the 36 adults studied were found to have MetS, with central obesity being the most common issue, particularly affecting those with SMA type 3.
  • Those with MetS experienced significantly lower QoL and higher fatigue levels compared to those without, suggesting a need for more extensive research to explore the implications of MetS in this population.
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  • The study aimed to evaluate the relationship between serum neurofilament light chain (sNfL) levels and different clinical forms of amyotrophic lateral sclerosis (ALS) in nearly 3000 patients across Germany and Austria.
  • Results indicated that sNfL levels varied significantly across ALS phenotypes, with higher levels associated with faster disease progression and bulbar onset, while primary lateral sclerosis (PLS) and some other phenotypes showed lower levels.
  • The findings suggest that understanding these phenotypes is crucial for interpreting sNfL results and could influence clinical trials and practice in ALS management.
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Dysfunctions in sensory processing are widely described in individuals with autism spectrum disorder (ASD), although little is known about the developmental course and the impact of these difficulties on the learning processes during the preschool and school ages of ASD children. Specifically, as regards the interplay between visual and haptic information in ASD during developmental age, knowledge is very scarce and controversial. In this study, we investigated unimodal (visual and haptic) and cross-modal (visuo-haptic) processing skills aimed at object recognition through a behavioural paradigm already used in children with typical development (TD), with cerebral palsy and with peripheral visual impairments.

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Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease characterized by the progressive degeneration of both upper and lower motor neurons. A defining histopathological feature in approximately 97% of all ALS cases is the accumulation of phosphorylated trans-activation response (TAR) DNA-binding protein 43 protein (pTDP-43) aggregates in the cytoplasm of neurons and glial cells within the central nervous system. Traditionally, it was believed that the accumulation of TDP-43 aggregates and subsequent neurodegeneration primarily occurs in motor neurons.

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Article Synopsis
  • Amyotrophic lateral sclerosis (ALS) is a severe neurodegenerative disease leading to muscle weakness and respiratory issues, and arimoclomol has shown potential neuroprotective effects in animal studies.
  • The ORARIALS-01 trial was a multicenter, double-blind study that assessed the safety and efficacy of arimoclomol in ALS patients, involving random assignment to either the drug or a placebo.
  • A total of 245 patients participated, and the primary goal was to evaluate treatment outcomes over 76 weeks, analyzing both efficacy and safety data among the participants.
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Amyotrophic lateral sclerosis (ALS) leads to death within 2-5 yr. Currently, available drugs only slightly prolong survival. We present novel insights into the pathophysiology of (SOD1)- and in particular (FUS)-ALS by revealing a supposedly central role of glycolic acid (GA) and D-lactic acid (DL)-both putative products of the Parkinson's disease associated glyoxylase DJ-1.

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