Efficacy and Safety Study for Cognitive Deficits in Adult Subjects With Schizophrenia

Study Overview
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Brief Summary
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This is an efficacy and safety study evaluating an experimental treatment for cognitive deficits in adults with schizophrenia.

Detailed Description
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This is a Phase 2 study designed to evaluate the efficacy and safety of ABT-288 in approximately 210 adults with schizophrenia. Subjects will be randomized to one of three treatment groups (ABT-288 Dose 1, ABT-288 Dose 2 or placebo) for a 12-week Treatment Period. The purpose of this research study is to find out whether ABT-288 compared to placebo can improve cognition and what side effects ABT 288 may cause. Cognition is the way a person thinks, and it includes abilities like paying attention, focusing, remembering things, and solving problems. Acronyms listed in the Outcomes and/or Eligibility sections for this study are defined below: MCCB: Measurement and Treatment Research to Improve Cognition in Schizophrenia (MATRICS) Consensus Cognitive Battery UPSA-2: University of California at San Diego (UCSD) Performance-Based Skills Assessment-2 CANTAB: Cambridge Neuropsychological Test Automated Battery PANSS: Positive and Negative Syndrome Scale NSA-16: Negative Symptom Assessment-16 CGI-S: Clinical Global Impression - Severity

Official Title
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A Randomized, Double-Blind, Placebo-Controlled, Parallel-Group, Phase 2 Study of the Safety and Efficacy of ABT-288 in the Treatment of Cognitive Deficits in Schizophrenia (CDS)

Conditions
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Cognitive Deficits in Schizophrenia

Intervention / Treatment
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* Drug: ABT-288 Low Dose
* Drug: Placebo
* Drug: ABT-288 High Dose


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Has current DSM-IV-TR diagnosis of schizophrenia confirmed by the Mini-International Neuropsychiatric Interview. Is clinically stable while receiving antipsychotic therapy with one or two atypical antipsychotic medications: lack of hospitalizations from 4 months of Initial Screening Visit; taking same antipsychotic medication(s) for at least 8 weeks prior to the Day -1 visit; core positive symptoms of PANSS no worse than moderate in severity throughout Screening Period of at least 4 weeks. Has been diagnosed with or treated for schizophrenia for at least 2 years prior to Initial Screening Visit. Has had continuity in psychiatric care (e.g., mental health system, clinic or physician) for at least 6 months prior to Initial Screening Visit. Has an identified responsible contact person (e.g., family member, social worker, case worker, or nurse) that can provide support to the subject and ensure compliance with protocol requirements. Exclusion Criteria: Has valid current or past diagnosis of schizoaffective disorder, bipolar disorder, manic episode, dementia, posttraumatic stress disorder, obsessive compulsive disorder, or a current major depressive episode. Has history of substance abuse (excluding nicotine or tobacco products) or alcohol abuse within 6 months prior to Screening Visit; has a substance dependence disorder (excluding nicotine or tobacco products) that has not been remitted for at least 1 year prior to Initial Screening Visit. Is taking any medication for extrapyramidal symptoms at any time from the Initial Screening Visit until the Day -1 Visit. Is taking any antidepressant that is excluded, including tricyclic antidepressants and monoamine oxidase inhibitors, at any time from 8 weeks prior to the Day -1 Visit. Has significant suicidal ideation at Initial Screening Visit. Has had a suicide attempt within 1 year prior to the Day -1 Visit. Has participated in another trial utilizing the MATRICS Consensus Cognitive Battery (MCCB) or UCSD Performance-Based Skills Assessment (UPSA) (any version) within 6 months prior to Initial Screening Visit. Is currently enrolled in any form of cognitive remediation training.

Ages Eligible for Study
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Minimum Age: 20 Years
Maximum Age: 55 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: ABT-288 Dose 1<br>low dose of ABT-288 | Drug: ABT-288 Low Dose<br> <br> |
| Experimental: ABT-288 Dose 2<br>high dose of ABT-288 | Drug: ABT-288 High Dose<br> <br> |
| Placebo Comparator: Sugar Pill<br>inactive substance | Drug: Placebo<br>* inactive substance<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Cognition: MCCB |  | Measurements from screening period through 12-week treatment period | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Functioning: UPSA-2 |  | Measurements from screening period through 12-week treatment period | 
| Cognition: CANTAB |  | Measurements from screening period through 12-week treatment period | 
| Symptom Severity: PANSS, NSA-16, CGI-S |  | Measurements from screening period through 12-week treatment period |