Effects of Dalfampridine on Cognition in Multiple Sclerosis

NCT ID: NCT02006160

Last Updated: 2020-10-01

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE2/PHASE3
• Total Enrollment: 61 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2011-12-31
• Study Completion Date: 2016-02-29

Brief Summary

Cognitive impairment is common in multiple sclerosis (MS) and has devastating impact on functional activities. There is great demand for medications that will enhance cognitive capacity in MS patients. To date, there is no evidence for improvement in cognition following treatment with aminopyridines, but the few studies on the topic included neuropsychological (NP) tests as secondary or tertiary outcomes, and were methodologically flawed. Dalfampridine may enhance cognition by direct pharmacological mechanisms, and should have effects on motor outcomes as in prior studies. By combining cognition and motor outcomes in the proposed study, the investigators will evaluate if the same patients with positive effects show beneficial responses on motor outcomes including physical activity and if such motor outcomes mediate and/or moderate cognitive improvements with dalfampridine

Detailed Description

3a. Patient Sample and Recruitment

Subjects will be consecutively selected from the Western New York (NY) region where the Baird MS Center and the Jacobs Neurological Institute are located. Patients will be interviewed and their records reviewed to assess for inclusion/exclusion. Patients will then be approached in the clinic or contacted by telephone and invited to participate in this clinical trial. The attached flier will also be used to directly advertise the study to patients. Patients who initiate contact with the researcher will be interviewed to assess eligibility.

Inclusion Criteria. Patients will be eligible for the study if they fulfill all the inclusion criteria specified below

1. Males/Females who are ≥ 18 years old and < 65 years old and are capable of understanding and complying with the protocol, including speaking and writing fluent English and having at least a 9th grade education.

2. Have a diagnosis of MS, as per revised McDonald's Criteria.

3. Have not received steroids in last thirty (30) days or a relapse in the last ninety (90) days, and whose MS is considered stable.

4. Impression of cognitive impairment as indicated by one of the following: (a) positive NP testing following diagnosis of MS as determined by board certified neuropsychologist or with z scores <-1.5 below expectation in at least one cognitive domain, or (b) informant Multiple Sclerosis Neuropsychological Questionnaire (MSNQ) >28.

5. An Expanded Disability Status Scale (EDSS) of ≤ 6.5.

6. Have given written informed consent prior to any study-related procedure not part of normal medical care, with the understanding that consent may be withdrawn by the subject at any time without prejudice to his/her future medical care.

7. Are capable of performing the requirements of a NP test battery including at least 20/70 near visual acuity by near vision chart, with correction allowed.

8. If female, must neither be pregnant nor breast-feeding and must either (a) be > 12 months post-menopausal or surgically sterilized, or (b) agree to use an acceptable method of birth control for the duration of the study. Abstinence will not be considered an acceptable method of birth control.

Exclusion Criteria. Patients will be excluded from the study if they meet any one or more of the exclusion criteria specified below:

1. Have cognitive deficits caused by concomitant medication usage or other significant neurological/psychological disease e.g. Alzheimer's disease, Parkinson's disease, stroke, transient ischemic attack, Vascular Dementia, Huntington's disease, traumatic brain injury or chronic central nervous system (CNS) infection

2. Have evidence of other medical cause(s) of cognitive impairment

3. Evidence of major mental illness predating the onset of MS

4. Have evidence of major depression as determined by a positive Beck Depression Index-Fast Screen (BDIFS) and clinician interview

5. Have report of uncontrolled or labile hypertension, tachycardia, cardiovascular or cerebrovascular disease

6. History of seizure disorder.

7. Optic neuritis within 6 months of enrollment.

8. Trigeminal neuralgia.

9. Prior exposure to aminopyridines.

Additional Exclusion Criteria for optional speech module. Patients will not be eligible for enrollment in the optional speech module is they meet one or more of the exclusion criteria below:

1. Have any language/dialect other than Standard American English as their first language.

2. Make use of a mechanical hearing aid.

3b. Outcome Measures

Cognition Endpoints. Psychometric testing will incorporate gold standard tests from validated test batteries by Benedict et al and Rao et al [7-9, 47-49]. The test order is described below:

Table 2. Cognitive Battery Test Domain Time in min California Verbal Learning Test 2 (CVLT2) Learning Trials Auditory/Verbal Memory 15 Brief Visuospatial Memory Test Revised (BVMTR) Learning Trials Visual/Spatial Memory 05 Paced Auditory Serial Addition Test (PASAT) 3 sec Auditory Processing Speed 05 Symbol Digit Modalities Test (SDMT) Visual Processing speed 05 Delis Kaplan Executive Function System (DKEFS) Sorting Test Executive Function 12 California Verbal Learning Test 2 (CVLT2) Delayed Recall Auditory/Verbal Memory 05 Brief Visuospatial Memory Test Revised (BVMTR) Delayed Recall Visual/Spatial Memory 03 Total Time 50 min

Conditions

Multiple Sclerosis

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: QUADRUPLE

Study Groups

treatment

dalfampridine

Group Type: ACTIVE_COMPARATOR

dalfampridine

Intervention Type: DRUG

10 mg bid

control

placebo

Group Type: PLACEBO_COMPARATOR

placebo

Intervention Type: DRUG

10 mg bid

Interventions

dalfampridine

10 mg bid

Intervention Type: DRUG

placebo

10 mg bid

Intervention Type: DRUG

Other Intervention Names

Ampyra

Eligibility Criteria

Inclusion Criteria

1. Males/Females who are ≥ 18 years old and < 65 years old and are capable of understanding and complying with the protocol, including speaking and writing fluent English and having at least a 9th grade education.

2. Have a diagnosis of MS, as per revised McDonald's Criteria.

3. Have not received steroids in last thirty (30) days or a relapse in the last ninety (90) days, and whose MS is considered stable.

4. Impression of cognitive impairment as indicated by one of the following: (a) positive NP testing following diagnosis of MS as determined by board certified neuropsychologist or with z scores <-1.5 below expectation in at least one cognitive domain, or (b) informant MSNQ >28.

5. An Expanded Disability Status Scale (EDSS) of ≤ 6.5.

6. Have given written informed consent prior to any study-related procedure not part of normal medical care, with the understanding that consent may be withdrawn by the subject at any time without prejudice to his/her future medical care.

7. Are capable of performing the requirements of a NP test battery including at least 20/70 near visual acuity by near vision chart, with correction allowed.

8. If female, must neither be pregnant nor breast-feeding and must either (a) be > 12 months post-menopausal or surgically sterilized, or (b) agree to use an acceptable method of birth control for the duration of the study. Abstinence will not be considered an acceptable method of birth control.

Exclusion Criteria

1. Have cognitive deficits caused by concomitant medication usage or other significant neurological/psychological disease e.g. Alzheimer's disease, Parkinson's disease, stroke, transient ischemic attack, Vascular Dementia, Huntington's disease, traumatic brain injury or chronic CNS infection

2. Have evidence of other medical cause(s) of cognitive impairment

3. Evidence of major mental illness predating the onset of MS

4. Have evidence of major depression as determined by a positive BDIFS and clinician interview

5. Have report of uncontrolled or labile hypertension, tachycardia, cardiovascular or cerebrovascular disease

6. History of seizure disorder.

7. Optic neuritis within 6 months of enrollment.

8. Trigeminal neuralgia.

9. Prior exposure to aminopyridines within the last six months.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 60 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

State University of New York at Buffalo

OTHER

Sponsor Role: lead

Responsible Party

Ralph H.B. Benedict

Principal Investigator

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Ralph Benedict, PhD

Role: PRINCIPAL_INVESTIGATOR

University at Buffalo

Bianca Weinstock-Guttman, MD

Role: PRINCIPAL_INVESTIGATOR

University at Buffalo

Locations

Buffalo General Hospital

Buffalo, New York, United States

Countries

United States

References

Satchidanand N, Drake A, Smerbeck A, Hojnacki D, Kolb C, Patrick K, Weinstock-Guttman B, Motl R, Benedict RH. Dalfampridine benefits ambulation but not cognition in multiple sclerosis. Mult Scler. 2020 Jan;26(1):91-98. doi: 10.1177/1352458518815795. Epub 2018 Dec 19.

Reference Type: DERIVED

PMID: 30566030 (View on PubMed)

Other Identifiers

NEU3270511E

Identifier Type: -

Identifier Source: org_study_id