Safety and Efficacy of MEM 1003 Versus Placebo in Patients With Mild to Moderate Alzheimer's Disease

Memory Pharmaceuticals

Status and phase: Completed; Phase 2

Conditions: Alzheimer's Disease

Treatments: Drug: Placebo for MEM 1003; Drug: MEM 1003

Study type: Interventional

Funder types: Industry

Identifiers

NCT00257673

MEM 1003-004

Details and patient eligibility

About

The purpose of this study is to determine in a 12-week treatment study if MEM 1003 is a safe and effective treatment for patients with mild to moderate Alzheimer's disease.

Full description

Alzheimer's disease is the leading cause of dementia and one of the most common diseases of the aging population. It is a chronic brain disease that involves gradual memory loss, decline in the ability to perform routine tasks, disorientation, difficulty in learning, loss of language skills, impairment of judgment, and personality changes in affected individuals. The neurodegenerative nature of the disease eventually leads to the failure of other organ systems and death.

Perturbations in calcium homeostasis in the central nervous system, such as those associated with Alzheimer's disease and aging as well as stroke and head trauma can result in an increase in intracellular levels of calcium (Ca2+). Increased levels of Ca2+ may lead to cellular dysregulation and cell death. The role of calcium in these neurodegenerative processes led to the hypothesis that controlling calcium levels may be beneficial, particularly where progressive neuronal damage results in cognitive dysfunction and memory loss.

MEM 1003 is the (+)-enantiomer of a dihydropyridine that has been optimized for central nervous system activity. It inhibits L-type Ca2+ channels and within the anticipated human dosing range has more benign cardiovascular effects than other DHP L-Type calcium channel modulators.

Enrollment: 183 patients

Sex: All

Ages: 50 to 90 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• standardized MMSE Score of 10 to 24 points
• diagnosis of probable Alzheimer's disease
• magnetic resonance imaging or computed tomography examination compatible with AD
• modified Hachinski Ischemia Score of less than or equal to 4
• currently receiving no AD therapy or currently receiving donepezil, rivastigmine, or galantamine

Exclusion criteria

• head injury associated with cognitive impairment
• history of vascular dementia stroke, transient cerebral ischemic episodes, major depression, major psychotic disorder, or symptomatic postural hypotension
• treatment for Alzheimer's disease other than donepezil, rivastigmine, or galantamine; tacrine is not permitted in the last 30 days or memantine in the last 90 days
• treatment with calcium channel blockers or any investigational medications within the prior 30 days

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Triple Blind

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183 participants in 3 patient groups, including a placebo group

A

Experimental group

Description:

Active 30 mg MEM 1003

Treatment:

Drug: MEM 1003

Drug: MEM 1003

B

Experimental group

Description:

90 mg MEM 1003

Treatment:

Drug: MEM 1003

Drug: MEM 1003

C

Placebo Comparator group

Description:

Placebo for MEM 1003

Treatment:

Drug: Placebo for MEM 1003