Publications by authors named "Terence OBrien"

Background: There are no approved oral disease-modifying treatments for Alzheimer's disease (AD).

Objectives: The objective of this study was to assess efficacy and safety of blarcamesine (ANAVEX®2-73), an orally available small-molecule activator of the sigma-1 receptor (SIGMAR1) in early AD through restoration of cellular homeostasis including autophagy enhancement.

Design: ANAVEX2-73-AD-004 was a randomized, double-blind, placebo-controlled, 48-week Phase IIb/III trial.

View Article and Find Full Text PDF

Epilepsy continues to pose significant social and economic challenges on a global scale. Existing therapeutic approaches predominantly revolve around neurocentric mechanisms, and fail to control seizures in approximately one-third of patients. This underscores the pressing need for novel and complementary treatment approaches to address this gap.

View Article and Find Full Text PDF

Objective: To test a hypothesis that acutely regulated plasma microRNAs (miRNAs) can serve as prognostic biomarkers for the development of post-traumatic epilepsy (PTE).

Methods: Adult male Sprague-Dawley rats (n = 245) were randomized to lateral fluid-percussion-induced traumatic brain injury (TBI) or sham operation at three study sites (Finland, Australia, United States). Video-electroencephalography (vEEG) was performed on the seventh post-injury month to detect spontaneous seizures.

View Article and Find Full Text PDF
Article Synopsis
  • This study explores a new treatment combining acetazolamide and dronabinol (IHL-42X) for obstructive sleep apnea (OSA) in patients who don't respond to current therapies.
  • Participants with moderate to severe OSA underwent a crossover trial of different IHL-42X doses and a placebo to assess changes in apnea severity and related metrics.
  • The results showed significant reductions in apnea severity with IHL-42X compared to placebo, particularly at medium dose levels, while no serious adverse effects were reported, indicating it's a safe alternative.
View Article and Find Full Text PDF

Background: Advances in instrumented mouthguards (iMGs) allow for accurate quantification of single high-acceleration head impacts and cumulative head acceleration exposure in collision sports. However, relationships between these measures and risk of brain cell injury remain unclear.

Aim: The purpose of this study was to quantify measures of non-concussive head impact exposure and assess their association with blood glial fibrillary acidic protein (GFAP), neurofilament light (NfL) and phosphorylated-tau-181 (p-tau-181) levels in male Australian football players.

View Article and Find Full Text PDF

The early onset epilepsies encompass a heterogeneous group of disorders, some of which result in drug-resistant seizures, developmental delay, psychiatric comorbidities, and sudden death. Advancement in the widespread use of targeted gene panels as well as genome and exome sequencing has facilitated the identification of different causative genes in a subset of these patients. The ability to recognize the genetic basis of early onset epilepsies continues to improve, with de novo coding variants accounting for most of the genetic etiologies identified.

View Article and Find Full Text PDF

Background And Objectives: Stereo-EEG-guided radiofrequency thermocoagulation (RFTHC) has been proposed as relatively safe from a cognitive perspective; however, there is a lack of evidence based on neuropsychological assessments supporting this. This study is the first prospective evaluation of neuropsychological outcomes associated with stereo-EEG-guided RFTHC in patients with focal drug-resistant epilepsy.

Methods: This cohort study involved prospective recruitment of consecutive patients undergoing stereo-EEG from 2 Australian centers.

View Article and Find Full Text PDF

This report is the first comprehensive update on the activities of existing epilepsy-pregnancy registries since 2010. The primary aim of these registries, which were initiated by independent international research groups some 25 years ago, has been to assess the risk of major congenital malformations (MCMs) in offspring exposed in utero to different antiseizure medications (ASMs). Progress reports are provided here from the five original registries (the International Registry of Antiepileptic Drugs and Pregnancy EURAP, the North American Antiepileptic Drug Pregnancy Registry, the UK and Ireland Epilepsy and Pregnancy Register, the Kerala Registry of Epilepsy and Pregnancy, and the Raoul Wallenberg Australian Pregnancy Register of Antiepileptic Drugs) plus the more recently initiated West China Registry.

View Article and Find Full Text PDF

This review systematically analyzes potential biomarker candidates for post-traumatic epilepsy (PTE) in humans who have experienced moderate to severe traumatic brain injury (TBI). Focusing on biomarkers across biofluid-based protein, genetic, neuroimaging, and neurophysiological categories, this review distinguishes between TBI patients who develop PTE and those who do not. The review adheres to established methodologies outlined in the Cochrane Handbook for Systematic Reviews of Interventions.

View Article and Find Full Text PDF

Objectives: To examine the relationship between clinical, psychological, and cognitive characteristics of adults with functional seizures.

Methods: This study describes baseline characteristics of one-hundred and seven participants with a documented diagnosis of functional seizures recruited to the Re-PROGRAM randomised controlled trial. Participants completed a semi-structured interview, neuropsychological assessment, and questionnaire measures via Telehealth.

View Article and Find Full Text PDF
Article Synopsis
  • - Post-traumatic epilepsy (PTE) is a serious complication following traumatic brain injury (TBI) that increases health risks and mortality rates; researchers within the EpiBioS4Rx study aim to find therapies to prevent PTE in rat models.
  • - The study focuses on sodium selenate, which has shown promise in reducing seizure development post-TBI by acting on specific proteins in the brain; experiments measure how the drug is processed in rats' bodies and its effectiveness in reaching the brain.
  • - Results indicate that sodium selenate undergoes rapid transformation in the body and demonstrates complex clearance and distribution patterns, suggesting it effectively crosses the blood-brain barrier, which is crucial for its potential as a therapeutic agent.
View Article and Find Full Text PDF

Importance: Interventions that substantially slow neurodegeneration are needed to address the growing burden of Alzheimer disease (AD) to societies worldwide. Elevated brain iron observed in AD has been associated with accelerated cognitive decline and may be a tractable drug target.

Objective: To investigate whether the brain-permeable iron chelator deferiprone slows cognitive decline in people with AD.

View Article and Find Full Text PDF

Introduction: Vagus nerve stimulation (VNS) is an effective treatment for people with drug-resistant epilepsy. However, its mechanisms of action are poorly understood, including which nerve fibers are activated in humans during VNS in typical clinical settings and which are required for clinical efficacy. In particular, there have been no intraneural recordings of vagus nerve fiber activation in awake humans undergoing chronic VNS.

View Article and Find Full Text PDF

Objective: This study was undertaken to assess long-term safety, tolerability, and efficacy of lacosamide (LCM) as adjunctive therapy for generalized onset tonic-clonic seizures (GTCS) in patients aged ≥4 years with idiopathic generalized epilepsy (IGE).

Methods: EP0012 (NCT02408549) was a phase 3, multicenter, open-label extension (OLE) trial. Patients were enrolled from SP0982 (NCT02408523).

View Article and Find Full Text PDF

Epilepsy represents a common neurological disorder in patients with developmental brain lesions, particularly in association with malformations of cortical development and low-grade glioneuronal tumors. In these diseases, genetic and molecular alterations in neurons are increasingly discovered that can trigger abnormalities in the neuronal network, leading to higher neuronal excitability levels. However, the mechanisms underlying epilepsy cannot rely solely on assessing the neuronal component.

View Article and Find Full Text PDF
Article Synopsis
  • Scientists studied how different types of epilepsy in rats show specific electrical patterns called spike-wave complexes (SWCs) during seizures.
  • They used special software to analyze the frequency of these SWCs in various models of epilepsy, including brain injuries and genetic conditions.
  • The research found that while the spike part of these complexes was similar across different models, the wave part varied a lot, which could help understand seizures better and develop treatments.
View Article and Find Full Text PDF

Intimate partner violence is a serious, but underappreciated, issue that predominantly affects women and often results in concussion (i.e., mild traumatic brain injury).

View Article and Find Full Text PDF

Blood biomarkers are an emerging diagnostic and prognostic tool that reflect a range of neuropathological processes following traumatic brain injury (TBI). Their effectiveness in identifying long-term neuropathological processes after TBI is unclear. Studying biomarkers in the chronic phase is vital because elevated levels in TBI might result from distinct neuropathological mechanisms during acute and chronic phases.

View Article and Find Full Text PDF
Article Synopsis
  • E2730 is a GABA transporter-1 inhibitor that shows significant anti-seizure effects in a rodent model of chronic temporal lobe epilepsy, specifically the kainic acid status epilepticus (KASE) rat model.
  • A randomized cross-over study revealed that E2730 treatment resulted in a notable reduction of spontaneous seizures, with 73% of the treated animals becoming seizure-free and alterations in various neuroimaging measures indicating changes in GABAergic function.
  • The study found that while E2730 lowered taurine levels and affected gamma frequency oscillations in the brain, it did not change GABA receptor affinity or density, highlighting its complex impact on brain neurotransmission during seizure management.
View Article and Find Full Text PDF

Early onset epilepsies occur in newborns and infants, and to date, genetic aberrations and variants have been identified in approximately one quarter of all patients. With technological sequencing advances and ongoing research, the genetic diagnostic yield for specific seizure disorders and epilepsies is expected to increase. Genetic variants associated with epilepsy include chromosomal abnormalities and rearrangements of various sizes as well as single gene variants.

View Article and Find Full Text PDF

Background: Concerns have recently been raised about risks to the fetus resulting from paternal exposure to antiseizure medications (ASMs). To address these concerns, we conducted a systematic review of the literature to assess neurodevelopmental and anatomical outcomes in offspring born to fathers taking ASMs at the time of conception.

Methods: Electronic searches of MEDLINE, PsycINFO, and Embase were conducted to identify human studies published in English that reported on outcomes, comprising neurodevelopmental disorders, major congenital malformations, small-for-gestational age or low birth weight, in offspring of fathers taking ASMs at conception.

View Article and Find Full Text PDF

Valproic acid (VPA) is an effective and widely used anti-seizure medication but is teratogenic when used during pregnancy, affecting brain and spinal cord development for reasons that remain largely unclear. Here we designed a genetic recombinase-based SOX10 reporter system in human pluripotent stem cells that enables tracking and lineage tracing of Neural Crest cells (NCCs) in a human organoid model of the developing neural tube. We found that VPA induces extensive cellular senescence and promotes mesenchymal differentiation of human NCCs.

View Article and Find Full Text PDF

Objective: To characterize the experience of people with epilepsy and aligned healthcare workers (HCWs) during the first 18 months of the COVID-19 pandemic and compare experiences in high-income countries (HICs) with non-HICs.

Methods: Separate surveys for people with epilepsy and HCWs were distributed online in April 2020. Responses were collected to September 2021.

View Article and Find Full Text PDF

Background: Cognitive impairment is a clinical manifestation that occurs in the course of dementia like Alzheimer's disease. The association between cognitive impairment and gut microbiota is unclear.

Objective: We aimed to identify gut microbiota characteristics and key gut microbiota biomarkers associated with cognitive impairment in a relatively large cohort of older adults in China.

View Article and Find Full Text PDF

Objective: Vagus nerve stimulation (VNS) Therapy is routinely indicated for people with drug-resistant epilepsy (DRE). We analyzed the baseline characteristics of individuals receiving the recently released VNS models and identified factors associated with early or late implantation.

Methods: The Comprehensive Outcomes Registry of subjects with Epilepsy (CORE-VNS), a prospective observational study evaluating the clinical and psychosocial outcomes of VNS Therapy®, is following participants for up to 60 months after VNS implantation.

View Article and Find Full Text PDF