Working... Menu

A Study of Bryostatin in Moderately Severe to Severe Alzheimer's Disease Subjects Not On Memantine

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: NCT03560245
Recruitment Status : Active, not recruiting
First Posted : June 18, 2018
Last Update Posted : February 20, 2019
Worldwide Clinical Trials
Information provided by (Responsible Party):
Neurotrope Bioscience, Inc.

Brief Summary:
This is a randomized double-blind Placebo-controlled, Phase 2 study comparing bryostatin to placebo for the treatment of moderately severe to severe Alzheimer's disease in subjects not receiving memantine treatment. The study is 15 weeks in duration, including a safety and efficacy evaluation 30 days after the last dose of study drug. Subjects will receive 7 doses of study drug during the study. The primary efficacy endpoint is change in the Severe Impairment Battery (SIB) scale score after 12 weeks of treatment from baseline (taking the change in the average of SIB measures observed during the Week 13 to Week 15 time window from SIB at baseline.

Condition or disease Intervention/treatment Phase
Alzheimer Disease Drug: Bryostatin Other: Placebo Phase 2

Detailed Description:
Eligible subjects will be stratified based on Mini Mental State Exam (MMSE-2) scores 4-9 vs. 10-15 and will be randomized 1:1 to one of two treatment arms: 20µg bryostatin or placebo for twelve weeks. The first two doses of study drug will be a loading dose 20% higher (i.e., 24µg) than the assigned dose and will be administered one week apart. Thereafter, the assigned dose of 20µg will commence with the third dose and be administered every other week. Drug is administered IV by continuous infusion over 45(±5) minutes. Subjects are scheduled to receive seven doses over 12 weeks.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 100 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Intervention Model Description: Eligible subjects will be stratified based on Mini Mental State Exam (MMSE-2) scores 4-9 vs. 10-15 and will be randomized 1:1 to one of two treatment arms: 20µg bryostatin or placebo for twelve weeks (7 doses).
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Randomized, Double-Blind, Placebo-Controlled, Phase 2 Study Assessing the Safety, Tolerability and Efficacy of Bryostatin in the Treatment of Moderately Severe to Severe Alzheimer's Disease Subjects Not Receiving Memantine Treatment
Actual Study Start Date : June 20, 2018
Estimated Primary Completion Date : July 30, 2019
Estimated Study Completion Date : July 30, 2019

Resource links provided by the National Library of Medicine

Drug Information available for: Memantine

Arm Intervention/treatment
Experimental: Bryostatin 20µg
20µg Bryostatin administered IV over 45 minutes every other week after 2 initial loading doses of 24 micrograms administered weekly. A total of 7 doses administered over 12 weeks.
Drug: Bryostatin
The investigational drug product, bryostatin, is a sterile, pyrogen-free, lyophilized powder intended for IV infusion upon reconstitution and dilution.

Placebo Comparator: Placebo

Placebo administered IV over 45 minutes every other weekafter 2 initial doses administered weekly. A total of 7 doses administered over 12 weeks.

The placebo is a sterile, pyrogen-free, lyophilized powder identical in appearance to the active drug, intended for IV infusion upon reconstitution and dilution.

Other: Placebo
The placebo is a sterile, pyrogen-free, lyophilized powder identical in appearance to the experimental drug

Primary Outcome Measures :
  1. Safety: Treatment emergent adverse events (AEs) and serious adverse events (SAEs) [ Time Frame: Baseline through 30 days post end of treatment (up to Day 107) ]
    Incidence of adverse events (AEs), serious adverse events (SAEs), Adverse event of special interest - myalgia

  2. Efficacy: change in the Severe Impairment Battery (SIB) score obtained between the average 13 and 15-week scores and the baseline score [ Time Frame: The average of 13 and 15-week scores (Day 91 and Day 107) ]
    The SIB assesses cognition in subjects with moderate and severe Alzheimer's disease(AD). Test questions measure attention, language, orientation, memory, praxis, visuospatial ability, construction, social skills, orienting head to name. Non-verbal responses are allowed, thus decreasing the need for language output. Forty questions are included with a total point score range of 0-100. Lower scores indicate greater cognitive impairment.

Secondary Outcome Measures :
  1. The repeated Severe Impairment Battery (SIB) changes from the baseline SIB [ Time Frame: Weeks 5, 9, 13, and 15 ]

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:   55 Years to 85 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Written informed consent from caregiver and subject (if possible) or legally acceptable representative if different from caregiver
  2. Male and female subjects 55-85 years of age inclusive
  3. Cognitive deficit present for at least 2 years that meet the diagnostic criteria for probable Alzheimer's dementia. The diagnosis must be confirmed at the time of the screening visit
  4. MMSE-2 score of 4-15 inclusive (applies to Screening Visit only)
  5. Patients must be able to perform at least one item on the SIB and may not have a SIB score >93 at screening
  6. Neuroimaging computerized tomography (CT) or Magnetic Resonance Imaging (MRI) within the last 24 months consistent with a diagnosis of probable AD without any other clinically significant co-morbid pathologies. If there has been a significant change in the subject's clinical status since the last imaging study that is not consistent with progression of the subject's AD, an imaging study should be performed to confirm eligibility
  7. Reliable caregiver(s) or informant(s) who attends the subject at least an average of 3 hours or more per day for 3 or more days per week and who will agree to accompany the subject to the clinic visits and reliably complete the caregiver questions
  8. Adequate vision and motor function to comply with testing
  9. If taking an approved cholinesterase inhibitor for treatment of Alzheimer's disease, must be on a stable dose for at least 3 months prior to entry into study and the dose must not change during the study unless a change is required due to an adverse effect of the prescribed medication or a clinically significant change in the patient's status
  10. Subjects who are memantine naïve or have been off memantine for at least 30 days prior to initial treatment with study drug
  11. Subjects on neuroleptic medications must be on a stable dose for ≥4 weeks (dose adjustments will be permitted)
  12. Females participating in the study must meet one the following criteria:

    1. Surgically sterilized (e.g., hysterectomy, bilateral oophorectomy or tubal ligation) for at least 6 months or postmenopausal (postmenopausal females must have no menstrual bleeding for at least 1 year) or
    2. If not postmenopausal, agree to use a double method of contraception, one of which is a barrier method (e.g., intrauterine device plus condom, spermicidal gel plus condom) 30 days prior to dosing until 30 days after last dose and have negative human chorionic gonadotropin (β-hCG) test for pregnancy at screening
  13. Males who have not had a vasectomy must use appropriate contraception methods (barrier or abstinence) from 30 days prior to dosing until 30 days after last dose
  14. In the opinion of the PI subjects should be in reasonably good health over the last 6 months and any chronic disease should be stable -

Exclusion Criteria:

  1. Dementia due to any condition other than AD, including vascular dementia (Rosen-Modified Hachinski Ischemic score ≥ 5)
  2. Evidence of significant central nervous system (CNS) vascular disease on previous neuroimaging including but not limited to: cortical stroke, multiple infarcts, localized single infarcts in the thalamus, angular gyrus, multiple lacunar infarcts or extensive white matter injury
  3. Clinically significant neurologic disease or condition other than AD, such as cerebral tumor, chronic subdural fluid collections, Huntington's Disease, Parkinson's Disease, normal pressure hydrocephalus, or any other diagnosis that could interfere with assessment of safety and efficacy
  4. Evidence of clinically significant unstable cardiovascular, pulmonary, renal, hepatic, gastrointestinal, neurologic, or metabolic disease within the 6 months prior to enrollment. . If there is a history of cancer the subject should be clear of cancer for at least 2 years prior to screening. More recent history of basal cell or squamous cell carcinoma and melanoma in situ (Stage 0) may be acceptable after review by the Medical Monitor.
  5. Creatinine clearance (CL) of <45ml/min
  6. Poorly controlled diabetes, at the discretion of the Principal Investigator
  7. Concomitant treatment with NMDA receptor antagonists such as but not limited to memantine or drug combinations containing memantine, dextromethorphan (a cough suppressant), ketamine, phencyclidine (PCP), methoxetamine (MXE), nitrous oxide (N2O) and the following synthetic opioids: penthidine, levorphanol, methadone, dextropropoxyphene, tramadol, and ketobemidone.
  8. Use of vitamin E > 400 International Units (IU) per day within 14 days prior to screening
  9. Use of valproic acid within 14 days prior to screening
  10. Use of an active Alzheimer's vaccine within 2 years prior to screening
  11. Use of a monoclonal antibody for treatment of AD within 1 year prior to screening
  12. Any medical or psychiatric condition that is likely to require initiation of additional medication or surgical intervention during the course of the study
  13. Any screening laboratory values outside the reference ranges that are deemed clinically significant by the PI
  14. Use of an investigational drug within 30 days prior to screening
  15. Suicidality defined as active suicidal thoughts during the 6 months prior to screening or at Baseline [Type 4 or 5 on C-SSRS], or history of suicide attempt in previous 2 years, or at serious suicide risk in PI's judgment
  16. Major psychiatric illness such as current major depression according to Diagnostic and Statistical Manual of Mental Disorders, 5th Edition , current or past diagnosis of bipolar disorder, schizophrenia, or any other psychiatric disorder that might interfere with the assessments of safety or efficacy at the discretion of the PI
  17. Diagnosis of alcohol or drug abuse within the last 2 years
  18. Abnormal laboratory tests that suggest an alternate etiology for dementia. If the patient has prior history of serum B12 abnormality, anemia with hemoglobin ≤10g /dl, thyroid function abnormality, electrolyte abnormality, or positive syphilis serology the patient should be revaluated to determine if these potential causes of dementia have been addressed. Only if these causes have been ruled out as the cause of the dementia can the patient be enrolled.
  19. History of prolonged QT or prolonged QT on screening ECG (QTcB or QTcF >499 per central reader)
  20. Acute or poorly controlled medical illness: blood pressure > 180 mmHg systolic or 100 mmHg diastolic; myocardial infarction within 6 months; uncompensated congestive heart failure [New York Heart Association (NYHA) Class III or IV]
  21. Known to be seropositive for human immunodeficiency virus (HIV)
  22. Known to be seropositive for Hepatitis B or C, unless successful curative treatment for Hepatitis C (e.g., Harvoni) has been received and there is documentation that there is no Hep B/C virus detected 3 months after completion of treatment
  23. AST or ALT >3x upper limit of normal (ULN) and total bilirubin >2x ULN or International Normalized Ratio (INR) >1.5
  24. Prior exposure to bryostatin, or known sensitivity to bryostatin or any ingredient in the study drug
  25. Any other concurrent medical condition, which in the opinion of the PI makes the subject unsuitable for the clinical study

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): NCT03560245

  Show 28 Study Locations
Sponsors and Collaborators
Neurotrope Bioscience, Inc.
Worldwide Clinical Trials

Layout table for additonal information
Responsible Party: Neurotrope Bioscience, Inc. Identifier: NCT03560245     History of Changes
Other Study ID Numbers: NTRP101-203
First Posted: June 18, 2018    Key Record Dates
Last Update Posted: February 20, 2019
Last Verified: September 2018
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

Layout table for additional information
Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No

Additional relevant MeSH terms:
Layout table for MeSH terms
Alzheimer Disease
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Neurodegenerative Diseases
Neurocognitive Disorders
Mental Disorders
Bryostatin 1
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
Adjuvants, Immunologic
Immunologic Factors
Antineoplastic Agents