Alberto J. Espay

Effects of admission hyperglycemia on mortality and costs in acute ischemic stroke

BackgroundHyperglycemia at the time of acute ischemic stroke has been linked to worse outcome in both human and animal studies. ObjectiveTo describe the prevalence and severity of hyperglycemia on hospital admission among acute ischemic stroke patients, to examine the independent relationship of admission hyperglycemia to all-cause mortality, and to document the inpatient management of hyperglycemia. MethodsPatients hospitalized with acute ischemic stroke at one hospital from July 1993 to June 1998 (n = 656) were identified. Demographic data, diagnoses, and blood glucose (BG) values were retrieved from the electronic medical record system. Admission stroke severity, fingerstick BG results, and new diabetes diagnoses were obtained by chart review. Hyperglycemia was defined as admitting random serum BG ≥ 130 mg/dL. Hazard ratios (HR) for 30-day, 1-year, and 6-year mortality were calculated using multivariable Cox regression models. ResultsHyperglycemia at admission to hospital was present in 40% of patients with acute stroke. Patients with hyperglycemia were more often women and more likely to have prior diagnoses of diabetes and heart failure. Almost all of these patients remained hyperglycemic during their hospital stay (mean BG = 206 mg/dL), and 43% received no inpatient hypoglycemic drugs. Hyperglycemic patients had longer hospital stay (7 vs 6 days, p = 0.015) and higher inpatient hospital charges (

Continuous intrajejunal infusion of levodopa-carbidopa intestinal gel for patients with advanced Parkinson's disease: a randomised, controlled, double-blind, double-dummy study

6,611 vs

Cortical and spinal abnormalities in psychogenic dystonia

5,262, p < 0.001). Hyperglycemia independently increased the risk for death at 30 days (HR 1.87, p ≤ 0.01), 1 year (HR 1.75, p ≤ 0.01), and 6 years after stroke (HR 1.41, p ≤ 0.01). ConclusionsAdmitting hyperglycemia was common among patients with acute ischemic stroke and was associated with increased short- and long-term mortality and with increased inpatient charges. Inpatient blood glucose management was suboptimal in this hospital. A trial of intensive treatment of hyperglycemia should be considered.

Creation of an Open-Access, Mutation-Defined Fibroblast Resource for Neurological Disease Research

BACKGROUND Levodopa is the most effective therapy for Parkinsons disease, but chronic treatment is associated with the development of potentially disabling motor complications. Experimental studies suggest that motor complications are due to non-physiological, intermittent administration of the drug, and can be reduced with continuous delivery. We aimed to assess efficacy and safety of levodopa-carbidopa intestinal gel delivered continuously through an intrajejunal percutaneous tube. METHODS In our 12-week, randomised, double-blind, double-dummy, double-titration trial, we enrolled adults (aged ≥ 30 years) with advanced Parkinsons disease and motor complications at 26 centres in Germany, New Zealand, and the USA. Eligible participants had jejunal placement of a percutaneous gastrojejunostomy tube, and were then randomly allocated (1:1) to treatment with immediate-release oral levodopa-carbidopa plus placebo intestinal gel infusion or levodopa-carbidopa intestinal gel infusion plus oral placebo. Randomisation was stratified by site, with a mixed block size of 2 or 4. The primary endpoint was change from baseline to final visit in motor off-time. We assessed change in motor on-time without troublesome dyskinesia as a prespecified key secondary outcome. We assessed efficacy in a full-analysis set of participants with data for baseline and at least one post-baseline assessment, and imputed missing data with the last observation carried forward approach. We assessed safety in randomly allocated patients who underwent the percutaneous gastrojejunostomy procedure. This study is registered with ClinicalTrials.gov, numbers NCT00660387 and NCT0357994. FINDINGS From baseline to 12 weeks in the full-analysis set, mean off-time decreased by 4.04 h (SE 0.65) for 35 patients allocated to the levodopa-carbidopa intestinal gel group compared with a decrease of 2.14 h (0.66) for 31 patients allocated to immediate-release oral levodopa-carbidopa (difference -1.91 h [95% CI -3.05 to -0.76]; p=0.0015). Mean on-time without troublesome dyskinesia increased by 4.11 h (SE 0.75) in the intestinal gel group and 2.24 h (0.76) in the immediate-release oral group (difference 1.86 [95% CI 0.56 to 3.17]; p=0.0059). In the safety analyses 35 (95%) of 37 patients allocated to the levodopa-carbidopa intestinal gel group had adverse events (five [14%] serious), as did 34 (100%) of 34 patients allocated to the immediate-release oral levodopa-carbidopa group (seven [21%] serious), mainly associated with the percutaneous gastrojejunostomy tube. INTERPRETATION Continuous delivery of levodopa-carbidopa with an intestinal gel offers a promising option for control of advanced Parkinsons disease with motor complications. Benefits noted with intestinal gel delivery were of a greater magnitude than were those obtained with medical therapies to date, and our study is, to our knowledge, the first demonstration of the benefit of continuous levodopa delivery in a double-blind controlled study. FUNDING AbbVie.

A recurrent de novo mutation in KCNC1 causes progressive myoclonus epilepsy

The pathophysiology of psychogenic dystonia has not been examined, but a growing body of literature suggests that abnormal sensory input from repetitive movements can lead to plastic cortical changes. Reduced cortical and spinal inhibition is well documented in organic dystonia. We tested the hypothesis that aberrant sensory input associated with abnormal posture may cause similar abnormalities by testing patients with psychogenic dystonia.

Inosine to increase serum and cerebrospinal fluid urate in Parkinson disease: a randomized clinical trial.

Our understanding of the molecular mechanisms of many neurological disorders has been greatly enhanced by the discovery of mutations in genes linked to familial forms of these diseases. These have facilitated the generation of cell and animal models that can be used to understand the underlying molecular pathology. Recently, there has been a surge of interest in the use of patient-derived cells, due to the development of induced pluripotent stem cells and their subsequent differentiation into neurons and glia. Access to patient cell lines carrying the relevant mutations is a limiting factor for many centres wishing to pursue this research. We have therefore generated an open-access collection of fibroblast lines from patients carrying mutations linked to neurological disease. These cell lines have been deposited in the National Institute for Neurological Disorders and Stroke (NINDS) Repository at the Coriell Institute for Medical Research and can be requested by any research group for use in in vitro disease modelling. There are currently 71 mutation-defined cell lines available for request from a wide range of neurological disorders and this collection will be continually expanded. This represents a significant resource that will advance the use of patient cells as disease models by the scientific community.

Cognitive performance and neuropsychiatric symptoms in early, untreated Parkinson's disease

Progressive myoclonus epilepsies (PMEs) are a group of rare, inherited disorders manifesting with action myoclonus, tonic-clonic seizures and ataxia. We sequenced the exomes of 84 unrelated individuals with PME of unknown cause and molecularly solved 26 cases (31%). Remarkably, a recurrent de novo mutation, c.959G>A (p.Arg320His), in KCNC1 was identified as a new major cause for PME. Eleven unrelated exome-sequenced (13%) and two affected individuals in a secondary cohort (7%) had this mutation. KCNC1 encodes KV3.1, a subunit of the KV3 voltage-gated potassium ion channels, which are major determinants of high-frequency neuronal firing. Functional analysis of the Arg320His mutant channel showed a dominant-negative loss-of-function effect. Ten cases had pathogenic mutations in known PME-associated genes (NEU1, NHLRC1, AFG3L2, EPM2A, CLN6 and SERPINI1). Identification of mutations in PRNP, SACS and TBC1D24 expand their phenotypic spectra to PME. These findings provide insights into the molecular genetic basis of PME and show the role of de novo mutations in this disease entity.

Extended-release carbidopa-levodopa (IPX066) compared with immediate-release carbidopa-levodopa in patients with Parkinson's disease and motor fluctuations: a phase 3 randomised, double-blind trial

IMPORTANCE Convergent biological, epidemiological, and clinical data identified urate elevation as a candidate strategy for slowing disability progression in Parkinson disease (PD). OBJECTIVE To determine the safety, tolerability, and urate-elevating capability of the urate precursor inosine in early PD and to assess its suitability and potential design features for a disease-modification trial. DESIGN, SETTING, AND PARTICIPANTS The Safety of Urate Elevation in PD (SURE-PD) study, a randomized, double-blind, placebo-controlled, dose-ranging trial of inosine, enrolled participants from 2009 to 2011 and followed them for up to 25 months at outpatient visits to 17 credentialed clinical study sites of the Parkinson Study Group across the United States. Seventy-five consenting adults (mean age, 62 years; 55% women) with early PD not yet requiring symptomatic treatment and a serum urate concentration less than 6 mg/dL (the approximate population median) were enrolled. INTERVENTIONS Participants were randomized to 1 of 3 treatment arms: placebo or inosine titrated to produce mild (6.1-7.0 mg/dL) or moderate (7.1-8.0 mg/dL) serum urate elevation using 500-mg capsules taken orally up to 2 capsules 3 times per day. They were followed for up to 24 months (median, 18 months) while receiving the study drug plus 1 washout month. MAIN OUTCOMES AND MEASURES The prespecified primary outcomes were absence of unacceptable serious adverse events (safety), continued treatment without adverse event requiring dose reduction (tolerability), and elevation of urate assessed serially in serum and once (at 3 months) in cerebrospinal fluid. RESULTS Serious adverse events (17), including infrequent cardiovascular events, occurred at the same or lower rates in the inosine groups relative to placebo. No participant developed gout and 3 receiving inosine developed symptomatic urolithiasis. Treatment was tolerated by 95% of participants at 6 months, and no participant withdrew because of an adverse event. Serum urate rose by 2.3 and 3.0 mg/dL in the 2 inosine groups (P < .001 for each) vs placebo, and cerebrospinal fluid urate level was greater in both inosine groups (P = .006 and <.001, respectively). Secondary analyses demonstrated nonfutility of inosine treatment for slowing disability. CONCLUSIONS AND RELEVANCE Inosine was generally safe, tolerable, and effective in raising serum and cerebrospinal fluid urate levels in early PD. The findings support advancing to more definitive development of inosine as a potential disease-modifying therapy for PD. TRIAL REGISTRATION clinicaltrials.gov Identifier: NCT00833690.

Levodopa-carbidopa intestinal gel in advanced Parkinson's disease: Final 12-month, open-label results

This study was undertaken to determine the prevalence and correlates of cognitive impairment (CI) and neuropsychiatric symptoms (NPS) in early, untreated patients with Parkinsons disease (PD).

On state freezing of gait in Parkinson disease: a paradoxical levodopa-induced complication.

BACKGROUND IPX066 is an oral, extended-release, capsule formulation of carbidopa-levodopa. We aimed to assess this extended-release formulation versus immediate-release carbidopa-levodopa in patients with Parkinsons disease and motor fluctuations. METHODS We did a phase 3, randomised, double-blind, double-dummy study at 68 academic and clinical centres in North America and Europe. Patients with Parkinsons disease who had at least 2·5 h per day of off-time underwent 3 weeks of open-label immediate-release carbidopa-levodopa dose adjustment followed by 6 weeks of open-label extended-release carbidopa-levodopa dose conversion. These patients were then randomly allocated (1:1), by use of an interactive web-response system, to 13 weeks of double-blind treatment with extended-release or immediate-release carbidopa-levodopa plus matched placebos. The primary efficacy measure was off-time as a percentage of waking hours in all patients randomly allocated to treatment groups, adjusted for baseline value. This study is registered with ClinicalTrials.gov, number NCT00974974. FINDINGS Between Sept 29, 2009, and Aug 16, 2010, we enrolled 471 participants, of whom 393 (83%) were randomly allocated in the double-blind maintenance period and were included in the main efficacy analyses. As a percentage of waking hours, 201 patients treated double-blind with extended-release carbidopa-levodopa (mean 3·6 doses per day [SD 0·7]) had greater reductions in off-time than did 192 patients treated double-blind with immediate-release carbidopa-levodopa (mean 5·0 doses per day [1·2]). Covariate-adjusted end-of-study means were 23·82% (SD 14·91) for extended-release carbidopa-levodopa and 29·79% (15·81) for immediate-release carbidopa-levodopa (mean difference -5·97, 95% CI -9·05 to -2·89; p<0·0001). Extended-release carbidopa-levodopa reduced daily off-time by, on average, an extra -1·17 h (95% CI -1·69 to -0·66; p<0·0001) compared with immediate-release carbidopa-levodopa. During dose conversion with extended-release carbidopa-levodopa, 23 (5%) of 450 patients withdrew because of adverse events and 13 (3%) withdrew because of a lack of efficacy. In the maintenance period, the most common adverse events were insomnia (seven [3%] of 201 patients allocated extended-release carbidopa-levodopa vs two [1%] of 192 patients allocated immediate-release carbidopa-levodopa), nausea (six [3%] vs three [2%]), and falls (six [3%] vs four [2%]). INTERPRETATION Extended-release carbidopa-levodopa might be a useful treatment for patients with Parkinsons disease who have motor fluctuations, with potential benefits including decreased off-time and reduced levodopa dosing frequency. FUNDING Impax Laboratories.