Publications by authors named "Kai Siebenbrodt"

Article Synopsis
  • - Autoantibodies against Caspr2 are linked to limbic autoimmune encephalitis and pain, with 36% of patients in a study experiencing pain, which is often severe and sometimes the main symptom.
  • - Two main pain phenotypes were identified: distal-symmetric burning pain and widespread pain with myalgia/cramps, highlighting variability among patients.
  • - There is a correlation between anti-Caspr2 autoantibodies and pre-existing chronic pain risk factors, suggesting that these autoantibodies could indicate decreased pain sensitivity, warranting testing in patients with different types of pain.
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Background: Autoantibodies against the potassium voltage-gated channel subfamily A member 2 (KCNA2) have been described in a few cases of neuropsychiatric disorders, but their diagnostic and pathophysiological role is currently unknown, imposing challenges to medical practice.

Design / Methods: We retrospectively collected comprehensive clinical and paraclinical data of 35 patients with KCNA2 IgG autoantibodies detected in cell-based and tissue-based assays. Patients' sera and cerebrospinal fluid (CSF) were used for characterization of the antigen, clinical-serological correlations, and determination of IgG subclasses.

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Background: Assessment of quality of life (QoL) has become an important indicator for chronic neurological diseases. While these conditions often limit personal independence and autonomy, they are also associated with treatment-related problems and reduced life expectancy. Epilepsy has a tremendous impact on the QoL of patients and their families, which is often underestimated by practitioners.

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Background: Cytotoxic T lymphocytes take on a leading role in many immune-related diseases. They function as key effector immune cells fighting cancer cells, but they are also considerably involved in autoimmune diseases. Common to both situations, CD8 T cells need to adapt their metabolism and effector function to the harsh and nutrient-deprived conditions of the disease-associated microenvironment.

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Article Synopsis
  • * Out of 199 adult patients studied, 59 (29.6%) had multiple EEGs within the first 14 days of treatment, allowing for analysis of EEG patterns linked to patient outcomes.
  • * The findings suggest that an initially normal amplitude followed by low-voltage EEG is a significant predictor of poor outcomes, indicating that rEEG can be a valuable tool in evaluating prognosis for HE patients in settings without cEEG
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Status epilepticus (SE) is an acute, life-threatening medical condition that requires immediate, effective therapy. Therefore, the acute care of prolonged seizures and SE is a constant challenge for healthcare professionals, in both the pre-hospital and the in-hospital settings. Benzodiazepines (BZDs) are the first-line treatment for SE worldwide due to their efficacy, tolerability, and rapid onset of action.

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Background: Inflammation, particularly cytokine release, contributes to epileptogenesis by influencing the cerebral tissue remodeling and neuronal excitability that occurs after a precipitating epileptogenic insult. While several cytokines have been explored in this process, release kinetics are less well investigated. Determining the time course of cytokine release in the epileptogenic zone is necessary for precisely timed preventive or therapeutic anti-inflammatory interventions.

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Article Synopsis
  • Autoimmune neurological syndromes (AINS) associated with anti-GAD65 autoantibodies lead to various neurological symptoms, including seizures and cerebellitis, and also have a connection to autoimmune diabetes.
  • A genome-wide association study (GWAS) in a German cohort revealed 16 significant genetic loci linked to susceptibility to AINS, with a notable variant in the HLA class I region.
  • Over 40% of identified genetic variants affect the expression of genes in immune and neural cells, emphasizing the relationship between immune response and neurological function through specific pathways.
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Objective: This study was undertaken to quantify epilepsy-related costs of illness (COI) in Germany and identify cost-driving factors.

Methods: COI were calculated among adults with epilepsy of different etiologies and severities. Multiple regression analysis was applied to determine any epilepsy-related and sociodemographic factors that serve as cost-driving factors.

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G-protein-coupled receptors (GPCRs), especially chemokine receptors, play a central role in the regulation of T cell migration. Various GPCRs are upregulated in activated CD4 T cells, including P2Y10, a putative lysophospholipid receptor that is officially still considered an orphan GPCR, i.e.

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Objective: Patients with temporal lobe epilepsy caused by autoimmune limbic encephalitis (AI-TLE) clinically resemble patients with temporal lobe epilepsy with non-autoimmune etiologies (NAI-TLE) but have a different prognosis and require specific adjusted therapies. The objective of this study was to investigate whether patients with these forms of TLE can be discerned by means of neuropsychological assessment.

Methods: Data from 103 patients with TLE (n = 39 with AI-TLE and n = 64 with NAI-TLE, including n = 39 with hippocampal sclerosis [HS] and n = 25 with low-grade epilepsy-associated tumors [LEAT]) and 25 healthy controls who underwent comprehensive neuropsychological assessments were analyzed retrospectively.

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Introduction: Patient education is a central component of quality care. Enhancing patient knowledge can improve patients' quality of life and facilitate successful self-management. We sought to identify patients' knowledge levels and knowledge gaps regarding epilepsy-related risks, morbidity, and mortality.

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Article Synopsis
  • The study investigates the genetic factors involved in anti-NMDA receptor (anti-NMDAR) encephalitis, a common autoimmune brain disease.
  • Researchers conducted a genome-wide association study with 178 patients and 590 healthy individuals, identifying significant genetic variants on chromosomes 15 and 11.
  • The findings indicate potential causal genes linked to immune function and inflammation, suggesting further research could uncover more genetic influences and clarify the disease's mechanisms.
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Introduction: When the SARS-CoV-2 pandemic reached Europe in 2020, a German governmental order forced clinics to immediately suspend elective care, causing a problem for patients with chronic illnesses such as epilepsy. Here, we report the experience of one clinic that converted its outpatient care from personal appointments to telemedicine services.

Methods: Documentations of telephone contacts and telemedicine consultations at the Epilepsy Center Frankfurt Rhine-Main were recorded in detail between March and May 2020 and analyzed for acceptance, feasibility, and satisfaction of the conversion from personal to telemedicine appointments from both patients' and medical professionals' perspectives.

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In an aging society, epilepsy in old age will become a more and more relevant disease. The diagnosis is often difficult because of the frequent occurrence of focal seizures in old age, which are easily overlooked. The diagnosis is often delayed, particularly in older patients who, for example also suffer from dementia.

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