COVID-19 is an emerging, rapidly evolving situation.
Get the latest public health information from CDC:

Get the latest research information from NIH: Menu
Trial record 1 of 11 for:    memantine | Schizophrenia
Previous Study | Return to List | Next Study

Effect of Memantine on ERP in Early Schizophrenia and Healthy Subjects

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT02233556
Recruitment Status : Unknown
Verified December 2015 by National Taiwan University Hospital.
Recruitment status was:  Recruiting
First Posted : September 8, 2014
Last Update Posted : December 14, 2015
Information provided by (Responsible Party):
National Taiwan University Hospital

Brief Summary:
Patients with schizophrenia are deeply affected by the positive symptoms, negative symptoms and cognitive impairment. A generalized cognitive deficit could be frequently observed and traced back to early stage of the disease. Currently medication intervention significantly improves positive symptoms through dopamine receptor modification, leaving alone the negative symptoms and cognitive impairment. Besides dopamine dysregulation, more and more attention had been paid to the association of N-methyl-D-aspartate (NMDA) type glutamate receptor and schizophrenia, focusing on the neurobiological and cognitive biomarkers change. Memantine, an uncompetitive antagonist of NMDA type glutamate receptor approved as cognitive enhancer for Alzheimer's disease, is a potential candidate for preventing cognitive decline of schizophrenia. Previous randomized clinical trials failed to demonstrate its efficacy on chronic schizophrenic patients and it might be related to the chronic and irreversible disease process. There is also study supporting that memantine induces change in mismatch negativity (MMN) in frontal cortex of healthy subjects. This study will compare the MMN change of healthy subjects and the population of early schizophrenia, who has persistent neurobiological, cognitive biomarkers or negative symptoms despite subsided positive symptoms. Both male and female aged 20-45 years old outpatients with a length of illness for less than 5 years since first diagnosed as schizophrenia, currently receiving treatment by atypical antipsychotics in a relatively stable condition will be recruited. Healthy subjects will be recruited comparing their age and sex. We plan to recruit 10 subjects for both patient and healthy subjects with a total of 20 participants. All participants will receive general clinical, cognitive and event-related potential (ERP) evaluation as baseline before taking medication. Twenty mg of memantine will be given 4 hours before ERP retest. The analyses will be performed based on the change of ERP using paired-t sample test. Baseline clinical and cognitive symptoms will be analyzed as possible confounders.

Condition or disease Intervention/treatment Phase
Schizophrenia Drug: Memantine Not Applicable

Detailed Description:

In this proposal, we use one-dose memantine trial to compare the difference of MMN change between healthy subjects and early schizophrenia patients. The cognitive and negative symptoms will be counted as possible confounding variables. We would like to make connection and association between neurobiological and neurocognitive markers for further treatment application.

The specific aim of this project is to test if memantine will influence the ERPs change, as in healthy subjects, in patients with early schizophrenia. The specific study population is been known of just have their first episode psychosis subsided, conventionally defined by significantly improved positive symptoms, yet some of them complaining of cognitive decline or presenting with persistent negative symptoms. Previous study showed improvement in mismatch negativity was correlated with general function improvement in schizophrenia. Although a recent study failed to demonstrate positive effects on residual psychopathology of a group of chronic stable schizophrenic patients. In this study we are targeting at a specific population of early schizophrenic patients to examine the efficacy of memantine on neurobiological markers and possible application to general psychopathology. Our objectives include:

  1. Test memantine effects on the change of ERPs, especially focus on mismatch negativity.
  2. Compare the ERP difference between healthy subjects and early schizophrenic patients
  3. Examine whether the effect of memantine will be affected by any significant baseline clinical variables or predisposed cognitive deficits.

First if we could replicate the ERP change in healthy subjects influenced by memantine, and we could further compare the difference between healthy subjects and patient subjects. It may support the hypothesis of NMDA-type glutamate receptor dysregulation theory in schizophrenia. If further association is detected through larger scale study between ERP and clinical symptoms, we could apply memantine in the add-on treatment of schizophrenia. As memantine is already an approved medicine for treatment of moderate to severe Alzheimer disease in many countries worldwide, hopefully we can add a new indication to its original clinical application. Thus it will become the first medicine that can help a condition which has rendered a lot of schizophrenic patients marked impairments in their social and occupational functioning from the early stage of their life. We believe this impact will be even bigger than the original indication of memantine, which is exclusively for patients with dementia. Rather than delaying deterioration of cognitive functioning in patient's late life, an adjuvant therapy for early intervention in schizophrenia aiming at improving cognitive function and hence restoring social and occupational functioning bears greater impact on a patient's life trajectory and lessen the burden of a society. Furthermore, the results from this project will provide critical evidence to support or refute the hypoglutaminergic theory of schizophrenia, which might be an important complement to the hyperdopaminergic theory. With a better understanding of the pathophysiology of schizophrenia not only focusing on dopaminergic system-related positive symptoms but also glutamatergic system-related cognitive and negative symptoms, will provide theoretic base of psychopharmacology in developing agents targeting at different systems to improve the outcome of schizophrenia from the early stage or even the putative pre-psychotic stage of the illness.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 20 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Official Title: Effects of Memantine on Event-related Potential in the Comparison of Patients With Early Schizophrenia and Healthy Subjects
Study Start Date : February 2014
Estimated Primary Completion Date : December 2016
Estimated Study Completion Date : December 2016

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Schizophrenia

Arm Intervention/treatment
Experimental: Memantine
This study has only one arm. i.e. Single dose of memantine 20mg
Drug: Memantine

Taking 20mg(2 capsules) of memantine, followed by Event related potential assessments as below:

  1. Mismatch negativity(MMN)
  2. P50
Other Name: Ebixa 10 mg, manufactured by Lunbeck A/S, Denmark

Primary Outcome Measures :
  1. Changes in auditory event-related potentials "MMN"before/after intake of a single dose memantine [ Time Frame: 4 hours after intake of a single dose memantine ]
    Previous studies revealed deficits in cognition via auditory event-related potential, such as Mismatch Negativity. This study would compare the effect of single dose memantine in MMN.

Secondary Outcome Measures :
  1. Changes in auditory event-related potentials "P50" before/after intake of a single dose memantine [ Time Frame: 4 hours after intake of a single dose memantine ]
    Previous studies revealed deficits in cognition via auditory event-related potential, such as P50. This study would compare the effect of single dose memantine in P50

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   20 Years to 45 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion criteria for patient subjects:

  1. Both male and female outpatients
  2. Age 20-45 years old at the time of screening
  3. A diagnosis of schizophrenia based on the Structured Clinical Interview for DSM-IV
  4. A duration of illness for less than 5 years since initially diagnosed as schizophrenia
  5. Currently receiving treatment mainly by an atypical antipsychotic (risperidone, olanzapine, amisulpiride, aripiprazole, quetiapine, ziprasidone, paliperidone), including long-acting injectable antipsychotic
  6. A first generation antipsychotic agent only for a low-dose, as needed use purpose
  7. No revised use of benzodiazepines, antidepressants, anticholinergics, or other concomitant medications during past 3 months

Inclusion criteria for healthy subjects:

  1. Both male and female
  2. Age 20-45 years old at the time of screening
  3. No psychiatric diagnosis based on the Structured Clinical Interview for DSM-IV
  4. No current use of any pharmaceutical agents in past 2 weeks

Exclusion criteria for all participants:

  1. A score of 5 or more on any of the 7 positive symptom items of the PANSS rating at screening
  2. Scores of 4 on at least 3 of the 7 positive symptom items of the PANSS rating at screening
  3. A major relapse resulting in readmission or doubling the dosage of previous effective antipsychotic treatment during the course of illness
  4. A change of current antipsychotic medication in recent 3 months
  5. Mental retardation known as IQ below 70 prior to the diagnosis of schizophrenia
  6. A history of pervasive mental disorder or bipolar disorder
  7. A medical condition with significant cognitive sequelae
  8. A history of substance dependence
  9. A history of hypersensitivity to memantine or other drugs of the same class, such as amantadine
  10. Pregnancy, plan to get pregnant during the study period, or lactating women
  11. Abnormal liver function (AST, ALT higher than doubling the upper limits of normal range) or abnormal renal function (blood creatinine > 1.3 mg/dL)
  12. A history of epilepsy
  13. A history of myocardial infarction, congestive heart failure, uncontrolled hypertension, stroke, or severe heart block.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT02233556

Layout table for location contacts
Contact: Ming-Hsien Hsieh, MD, PhD +886-2-23123456 ext 66790

Layout table for location information
National Taiwan University Hospital Recruiting
Taipei, Taiwan, 100
Contact: Ming-Hsien Hsieh, MD, PhD    +886-2-23123456 ext 66790   
Sub-Investigator: Cheng-Chung Liu, MD, PhD         
Sub-Investigator: Yi-Ting Lin, MD, PhD         
Sponsors and Collaborators
National Taiwan University Hospital
Layout table for investigator information
Principal Investigator: Ming-Hsien Hsieh, MD, PhD National Taiwan University Hospital
Layout table for additonal information
Responsible Party: National Taiwan University Hospital Identifier: NCT02233556    
Other Study ID Numbers: 201308083MINB
First Posted: September 8, 2014    Key Record Dates
Last Update Posted: December 14, 2015
Last Verified: December 2015
Keywords provided by National Taiwan University Hospital:
event-related potential
mismatch negativity
Additional relevant MeSH terms:
Layout table for MeSH terms
Schizophrenia Spectrum and Other Psychotic Disorders
Mental Disorders
Antiparkinson Agents
Anti-Dyskinesia Agents
Dopamine Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs
Excitatory Amino Acid Antagonists
Excitatory Amino Acid Agents