Publications by authors named "Michael Guger"

Background: Individual disease-modifying treatment (DMT) decisions might differ between female and male people with MS (pwMS).

Objective: To identify sex-related differences in DMT strategies over the past decades in a real-world setting.

Methods: In this cohort study, data from the Austrian Multiple Sclerosis Treatment Registry (AMSTR), a nationwide prospectively collected registry mandatory for reimbursement, were retrospectively analyzed.

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Objectives: To compare the effectiveness of early intensive treatment (EIT) versus escalation treatment (ESC) in a nationwide observational cohort of almost 1000 people with relapsing-remitting multiple sclerosis (RRMS).

Materials And Methods: The EIT cohort started with alemtuzumab (AZM), cladribine (CLAD), fingolimod (FTY), natalizumab (NTZ), ocrelizumab (OCR), or ozanimod (OZA); whereas, the ESC cohort was escalated from dimethylfumarate (DMF) or teriflunomide (TERI) to AZM, CLAD, FTY, NTZ, OCR, or OZA within the Austrian MS Treatment Registry. Patients had to stay on therapy for at least 3 months and up to 16 years.

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Introduction: With the approval of natalizumab in Europe in 2006, the Austrian Multiple Sclerosis Therapy Registry (AMSTR) was established. Here, we present data from this registry about effectiveness and safety of natalizumab in patients treated up to 14 years.

Patients/methods: Data retrieved from the AMSTR contained baseline characteristics and biannual documentation of annualised relapse rate (ARR) and Expanded Disability Status Scale (EDSS) score as well as adverse events and reasons for discontinuation on follow-up visits.

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Background And Purpose: Randomized controlled trials and observational studies of nabiximols oromucosal spray in patients with multiple sclerosis (MS) spasticity have shown improvement in a range of associated symptoms (pain, spasms, fatigue, bladder dysfunction, and sleep disturbances). This study evaluated the effectiveness and tolerability of add-on nabiximols in the routine management of patients with MS spasticity in Austria, with a focus on spasticity-associated symptoms.

Methods: This was an open, prospective, multicenter, observational, non-interventional study of patients with MS spasticity receiving add-on treatment with nabiximols oromucosal spray.

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Objectives: To compare in a nationwide observational cohort the effectiveness, frequency and reasons for treatment interruption of dimethylfumarate (DMF) and teriflunomide (TERI) (horizontal switchers) versus alemtuzumab (AZM), cladribine (CLAD), fingolimod (FTY), natalizumab (NTZ), ocrelizumab (OCR) and ozanimod (OZA) (vertical switchers) in patients with relapsing-remitting multiple sclerosis (pwRRMS) and prior interferon beta (IFN-beta) or glatiramer-acetate (GLAT) treatment.

Materials And Methods: The "horizontal switch cohort" included 669 and the "vertical switch cohort" 800 RRMS patients. We used propensity scores for inverse probability weighting in generalized linear (GLM) and Cox proportional hazards models to correct for bias in this non-randomized registry study.

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Language impairments, hallmarks of speech/language variant progressive supranuclear palsy, also occur in Richardson's syndrome (PSP-RS). Impaired communication may interfere with daily activities. Therefore, assessment of language functions is crucial.

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Background: Third vaccination against SARS-CoV-2 is recommended for patients with multiple sclerosis (pwMS), usually six months after the last vaccination.

Methods: In this prospective multicenter study on 292 pwMS and 46 healthy controls (HC), who had all received two vaccinations prior to study enrollment, SARS-CoV-2 IgG response was measured in the month before and 2-4 months after third vaccination. PwMS were categorized as follows: untreated (N-DMT, n = 32), receiving disease-modifying therapy (DMT) with expected humoral response (er-DMT: interferon-beta preparations, glatiramer acetate, dimethyl fumarate, teriflunomide, natalizumab, cladribine, alemtuzumab; n = 120) or no expected humoral response (nr-DMT: S1PMs, CD20mAb; n = 140).

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Background: COVID-19 continues to challenge neurologists in counselling persons with multiple sclerosis (pwMS) regarding disease-modifying treatment (DMT) and vaccination. The objective here was to characterize predictors of COVID-19 outcome in pwMS.

Methods: We included pwMS with PCR-confirmed COVID-19 diagnosis from a nationwide population-based registry.

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Background: Long-term outcome after COVID-19 in patients with multiple sclerosis (pwMS) is scarcely studied and controlled data are lacking.

Objective: To compare long-term outcome after COVID-19 in pwMS to a matched control group of pwMS without COVID-19.

Methods: We included pwMS with PCR-confirmed diagnosis of COVID-19 and ≥6 months of follow-up available and, as a control group, pwMS matched 1:1 for age, sex, disability level and disease-modifying treatment type.

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Objectives: A prospective, multicenter, open-label, noninterventional study assessed the efficacy, safety, tolerability, and patient satisfaction with teriflunomide therapy over a 24-month follow-up period under real-world conditions in Austria.

Methods: An all-comer population aged ≥18 years was followed in clinic and office-based settings. The primary objective of the study was the annualized relapse rate after 12 and 24 months of teriflunomide treatment.

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Background And Purpose: SARS-CoV2 vaccination is recommended for patients with multiple sclerosis (pwMS), but response may be limited by disease-modifying-treatments (DMTs). The aim of this study was to compare the rates of humoral immune response and safety of SARS-CoV-2 vaccines in pwMS and healthy controls (HCs).

Methods: In this multicenter prospective study on 456 pwMS and 116 HCs, SARS-CoV-2-IgG response was measured 3 months after the first vaccine dose.

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Background: Knowledge on immunity after SARS-CoV-2 infection in patients with multiple sclerosis (pwMS) and the impact of disease-modifying treatment (DMT) is limited.

Objective: To evaluate degree, duration and potential predictors of specific humoral immune response in pwMS with prior COVID-19.

Methods: Anti-SARS-CoV-2 antibody testing was performed in pwMS with PCR-confirmed diagnosis of symptomatic COVID-19 from a nation-wide registry.

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Article Synopsis
  • Multiple sclerosis (MS) is an autoimmune disease that attacks the central nervous system, leading to inflammation and damage to the nerves.
  • *Recent advancements in understanding the disease and the approval of new therapies have improved the prognosis for MS patients.
  • *The updated recommendations from the Multiple Sclerosis Therapy Consensus Group highlight the best treatment options for MS based on current scientific evidence, especially within German-speaking countries.
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Background: The COVID-19 pandemic challenges neurologists in counselling patients with multiple sclerosis (pwMS) regarding their risk by SARS-CoV-2 and in guiding disease-modifying treatment (DMT).

Objective: To characterize the prevalence and outcome of COVID-19 in pwMS specifically associated with different DMT in a nationwide population-based study.

Methods: We included patients aged ≥18 years with a confirmed diagnosis of MS and a diagnosis of COVID-19 established between January 1, 2020 and December 31, 2020.

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Article Synopsis
  • Multiple sclerosis is an autoimmune disease that damages the central nervous system, leading to inflammation and nerve damage.
  • Recent advancements in treatments and understanding of the disease have improved how it progresses and affects patients' lives.
  • The latest recommendations from the Multiple Sclerosis Therapy Consensus Group focus on disease-modifying therapies, specifically for regions in Europe, based on the most current scientific evidence.
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Progressive supranuclear palsy (PSP) and corticobasal syndrome (CBS) progress relentlessly and lead to a need for care. Caregiving is often burdensome. Little is known about the course of caregiver burden (CB) in PSP and CBS patients.

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Studies on caregiver burden in patients with frontotemporal lobar degeneration are rare, differ methodologically and show variable results. Single center longitudinal pilot study on caregiver burden and potential risk factors in patients with behavioural variant frontotemporal dementia (bvFTD) and semantic (svPPA) and non-fluent variants (nfvPPA) primary progressive aphasia. Forty-six bvFTD, nine svPPA, and six nfvPPA patients and caring relatives were analysed for up to 2 years using the Mini-Mental State Examination as global measure for cognitive performance, Frontal Assessment Battery (frontal lobe functions), Frontal Behavioural Inventory (personality and behaviour), Neuropsychiatric Inventory (dementia-related neuropsychiatric symptoms), Barthel Index and Lawton IADL Scale (basic and instrumental activities of daily living), the Caregiver Strain Index (CSI), and in most participants also the Zarit Burden Interview (ZBI).

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Article Synopsis
  • There is a lack of research on how patients recover from autoimmune encephalitis caused by antibodies affecting synaptic proteins and neuronal receptors.
  • A study tracked adult patients with autoimmune encephalitis over 12 months, evaluating their recovery using the modified Rankin Scale (mRS), and stratified them based on their specific antibody types.
  • Findings revealed that patients with anti-NMDAR and other antibodies had significant disability at 3 months, highlighting a need for better treatment strategies and more precise evaluation methods for different types of autoimmune encephalitis.
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Objectives: To evaluate long-term effectiveness of natalizumab (NTZ) and to determine demographic, clinical, and radiological predictors regarding long-term disease activity (≥ 7 years) in a nationwide observational cohort, using data collected prospectively in a real-life setting.

Materials And Methods: We analysed data from 230 patients from the Austrian Multiple Sclerosis Treatment Registry (AMSTR), who had started treatment with NTZ at any time since 2006 and stayed on NTZ for at least 7 years without treatment gap of more than three months.

Results: Estimated mean annualised relapse rates (ARR) over a mean treatment period of 9.

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Article Synopsis
  • Biopharmaceutical products, often used to treat autoimmune diseases, face challenges with immunogenicity and the development of antidrug antibodies (ADAs), impacting treatment efficacy for many patients.
  • A study by the European consortium ABIRISK analyzed 560 patients with multiple sclerosis, rheumatoid arthritis, and inflammatory bowel diseases over a year to explore patient-related factors that influence ADA development.
  • The findings revealed that immunosuppressants and antibiotics negatively correlated with ADA development time, while infections and tobacco smoking positively correlated with an increased risk of developing ADAs.
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To analyze safety and impact of natalizumab (NTZ) exposure on the disease course, pregnancy, and newborn outcomes of relapsing-remitting multiple sclerosis (RRMS) patients from the Austrian Multiple Sclerosis Treatment Registry (AMSTR). Twelve pregnancies of 11 women with RRMS exposed to treatment with NTZ were identified from the AMSTR. Exposure to NTZ was defined as treatment with NTZ from 8 weeks prior to the start of the last menstrual period and onward.

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The spectrum of coenzyme Q (CoQ) deficiency syndromes comprises a variety of disorders, including a form of autosomal recessive cerebellar ataxia (ARCA2) caused by mutations in the AarF domain-containing kinase 3 gene (ADCK3). Due to the potential response to CoQ supplementation, a timely diagnosis is crucial. Herein, we describe two siblings with a novel homozygous ADCK3 variant and an unusual presentation consisting of isolated writer's cramp with adult-onset.

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Objectives: To compare the efficacies, frequencies and reasons for treatment interruption of fingolimod (FTY), dimethyl fumarate (DMF) or teriflunomide (TERI) in a nationwide observational cohort.

Materials And Methods: Two cohorts of patients with relapsing-remitting multiple sclerosis (RRMS) having started treatment with FTY, DMF or TERI documented in the Austrian MS Treatment Registry (AMSTR) since 2014 and either staying on therapy for at least 24 months (24 m cohort) or with at least one follow-up visit after start of treatment (total cohort). The 24 m cohort included 629 RRMS patients: 295 in the FTY, 227 in the DMF and 107 in the TERI group.

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