Active clinical trials for "Epilepsies, Partial"

This study will evaluate the long term safety, tolerability, PK, and efficacy of XEN1101 25 mg QD taken orally in subjects with Focal Onset Seizures (FOS) or Primary Generalized Tonic-Clonic Seizures (PGTCS) for the treatment of seizures for up to 3 years.

Epilepsy is a serious chronic brain disorder that has a tendency towards recurrent seizures. This affects millions of people throughout the world and brings a heavy socioeconomic burden. The treatment of focal epilepsy is more challenging. Selecting an appropriate antiepileptic drug (AED) remains difficult because the chosen drug must be effective, safe and tolerable. It is important to consider the safety and efficacy of an AED for monotherapy separately. The goal of AED therapy is to achieve seizure control with little or no adverse efects, improve the patient's quality of life and ensure patient satisfaction. Different AEDs can be used to treat focal seizures in adults. First line medication for treating focal seizures is carbamazepine (CBZ), but it has drawbacks such as adverse effects including Steven Johnson syndrome, drug interactions and blood dyscrasia. There is also genetic linkage that Steven-Johnson syndrome and toxic epidermal necrolysis with carbamazepine are more common in individuals of Asian descent who carry the HLA-B 1502 allele. Another 1st line drug is lamotrigine (LTG) , it has favourable side effect profile including less sedative effect, less cognitive impairment, less drug interactions and blood dyscrasia. It has an elimination half- life longer than 24 hour, so once daily dosing is possible and it is associated with good drug compliance. Because of its favorable pharmacokinetics and side effect profile, LTG may be preferred to CBZ for focal epileptic seizures. In a study showed that the seizure freedom rate at the end of 6 months was 65% in LTG group compared to 73% in CBZ group. 41% in CBZ group and 32% in LTG group had at least one adverse effects. Few trials have compared the effectiveness and safety of LTG with CBZ as monotherapy for focal seizures worldwide. By far, no study has yet been conducted addressing the issue of efficacy and safety between lamotrigine and carbamazepine among focal epilepsy patients in the context of Bangladeshi population. Since the usage of LTG is less common in Bangladesh, comparative study of efficacy and safety of LTG versus CBZ will be expected to give more confidence for the use of the drug. Considering this, the study aims to assess the safety and efficacy of carbamazepine and lamotrigine among focal epilepsy patients. This study finding have an implication in the treatment protocol which will be beneficial for the patients and physicians as well.

Objectives: The overall study objective is to compare the sensitivities and specificities of morphometric analysis techniques using structural MRI images based on pre- and postsurgical localization of epileptic foci in patients undergoing presurgical evaluation for medically refractory epilepsy. To carry out these analyses, we aim to establish an age-stratified normative imaging database using healthy volunteers. Additional objectives are to identify abnormal networks in these patients using resting state fMRI/EEG and MEG/EEG, and to use language and memory fMRI tasks to examine the effects of epileptogenic zones and surgery on cognitive function and the networks associated with these functions. Study population: 300 adults and children (age 8 and older) with uncontrolled focal epilepsy, and 200 age-stratified healthy volunteers. Design: A retrospective and prospective natural history study. Research procedures for patients in this study include neuropsychological testing and 1-4 MRI sessions during presurgical evaluation and an additional 1-3 MRI sessions and neuropsychological testing approximately 12 months post-operatively. Research testing (such as research neuropsychological tests or MRI scanning sequences) will be done during a visit for clinical testing whenever possible, likely reducing the number of required visits. Patients will also have optional MEG and 7T structural imaging. Data will also be obtained from patients who have already undergone epilepsy surgery if they had procedures as outlined in the protocol and are willing to share the data. Healthy volunteers will receive a subset of the pre-operative procedures for patients, requiring at least 3 visits. In order to ensure adequate data acquisition, subjects may be re-scanned up to three times for the portions of the study in which they participated, possibly requiring additional visits. Outcome measures: The main outcomes will be establishment of normative values for morphometric analysis methods in age-stratified normal controls, and comparison of the sensitivity and specificity of these measures to pre- and postsurgical localization of the epileptogenic zone. Secondary outcome measures will include determination of the sensitivity and specificity of source localization using MEG/EEG and resting state fMRI/EEG, and to evaluate changes in activation during rest, as well as language and memory fMRI tasks in patients pre- and postsurgically, to examine the effects of epileptogenic zones and surgery on cognitive function and the networks underlying these functions.

Researchers are trying to determine if tracking seizure occurrence, seizure probability, behavioral state, cognition, and mood can be achieved using an implantable brain sensing and stimulation device (Medtronic RC+S Summit) coupled to an external, handheld, patient assistant device (PAD) with capability for patient interaction (patient data input). The system (RC+S & PAD) provides intracranial EEG (iEEG) sensing, electrical brain stimulation, and machine learning algorithms running on the RC+S and PAD that will be coupled with electrical brain stimulation (EBS) to prevent seizures and improve quality of life in patients with epilepsy.

The XEN1101 Phase 2 clinical trial is a randomized, double-blind, placebo-controlled study that will evaluate the clinical efficacy, safety and tolerability of increasing doses of XEN1101 administered as adjunctive treatment in adult patients diagnosed with focal epilepsy, followed by an optional open-label extension (OLE).

Patients with drug-refractory epilepsy sometimes need to be implanted with intracerebral electrodes in order to identify their seizure onset zone. During this procedure, direct electrical brain stimulations represent a standard clinical practice to assess seizure sensitivity and for functional mapping. This study aims at assessing if extending the range of stimulation frequencies of the usual clinical frequencies is of benefit for the definition of the seizure onset zone and hence for the presurgical planning.

Patients with cryptogenic focal epilepsy (unknown cause) represent about the 30% of the entire population of epilepsy patients. Among them, about 30% are drug-resistant. The implementation of of high-field magnetic resonance imaging resolution, the new Next Generation Sequencing techniques,and innovative non-invasive neurophysiological methods (Electroencephalogram-Functional magnetic resonance imaging and High Density-Electroencephalogram) could provide a superior identification of the epileptogenic zone and therefore an increased access to epilepsy surgery. Despite this, patients with cryptogenic epilepsy require more frequently invasive methods of presurgical study and they have more unfavorable results than patients with lesions detectable on magnetic resonance imaging. Within this context, the study is aimed at integrating the neurophysiological, radiological, neuropsychological and genetic aspects of patients with focal cryptogenic epilepsy in order to evaluate their surgical eligibility,sparing invasive methods.

Focal epilepsy is associated with widespread alterations in structural brain connectivity, often present at the disease onset and related to learning disabilities. Whether ongoing seizure activity contributes to network pathology is a matter of debate. This study intends to measure the impact of seizures on structural connectivity on a local and on a global level. In children examined with intracerebral electrodes to evaluate whether a surgical cure can be proposed, we combine intracerebral stereotactic electroencephalography (EEG) recordings with diffusion weighted imaging of white matter fibers. On the local level, the study will quantify the number of deficient connections in the seizure onset zone. On a global level, the study will compare the white matter fibers of the left and right hemisphere to probe whether physiological language lateralization is preserved.

Age related focal epilepsies in children encompasses, according to the ILAE criteria, benign epilepsy with centro temporal spikes (BECTS), atypical benign partial epilepsy (ABPE) and epileptic encephalopathy with continuous spike and waves during sleep (ECSWS). These non structural epilepsies are associated with interictal sleep spike and waves activated by sleep. Moreover, high prevalence of learning disorders occur in children with age related epilepsies. A correlation is suspected between learning disorders and sleep activation of spike and waves. The investigators suppose that learning dysfunction is linked to loss of information during sleep of epileptic children, unlike for control patients. As sleep allows memory consolidation of words learned during wakefulness, an epileptic activity during sleep may disrupt this consolidation, leading to a loss of information. Hypothesis: the investigators hypothesize a disruption of memory consolidation after one night in children affected with ABPE and ECSWS (severe group) compared to memory consolidation in children affected with BECTS (benign group), and control group. Primary purpose: To demonstrate that the deficit of delayed recall in 15 word learning test after one night is higher for the "severe group", compared to the "benign group" and the control group. Secondary purposes: to study the evolution over time of memory consolidation to evaluate the correlation of the deficit of delayed recall with executive dysfunction, clinical factors of epilepsy, neurophysiological factors of epilepsy, and sleep architecture

To evaluate the efficacy, safety and tolerability of cenobamate as adjunctive treatment of refractory focal epilepsy