Alzheimer's Disease: Potential Benefit of Isoflavones

NCT ID: NCT00205179

Last Updated: 2020-01-22

Study Results

Results available

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Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE2

Total Enrollment

72 participants

Study Classification

INTERVENTIONAL

Study Start Date

2005-01-31

Study Completion Date

2009-12-31

Brief Summary

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The purpose of this pilot study is to evaluate the potential effects of soy isoflavone supplements on cognitive function for men and women with Alzheimer's Disease (AD). Preliminary studies evaluating the effects of soy supplements on memory in cognitively healthy older adults have yielded promising results that are now being evaluated in patients with AD. It is hypothesized that isoflavone supplements will ameliorate cognitive declines for older adults diagnosed with Alzheimer's disease, when compared to subjects on placebo.

Detailed Description

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Conditions

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Alzheimer's Disease

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

QUADRUPLE

Participants Caregivers Investigators Outcome Assessors

Study Groups

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Novasoy treated

100mg/day soy isoflavones

Group Type EXPERIMENTAL

Novasoy

Intervention Type DRUG

100mg/day soy isoflavones

Placebo

100mg/day matching placebo

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type DRUG

100mg/day matching placebo

Interventions

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Novasoy

100mg/day soy isoflavones

Intervention Type DRUG

Placebo

100mg/day matching placebo

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

* Diagnosis of probable AD
* Has reliable and available caregiver to assist with medication and appointments
* On a stable dose of cholinesterase inhibitor, or if unable to tolerate medication, patient has no plans to re-initiate cholinergic therapies while in the study

Exclusion Criteria

* Current or recent use (\<6 months) of menopausal Hormone Replacement Therapy (HRT)
* Current or recent use (\<4 months) or oral antibiotic therapy
* Typical dietary intake of soy isoflavones \>5 mg/day
* History or significant gastro-intestinal or colon disease, or colon/intestinal resection
* Irritable bowel syndrome
* History of breast cancer, or abnormal mammogram within 12 months
* History of chronic obstructive pulmonary disease, diabetes mellitus, liver disease or unstable ischemic heart disease
* Significant neurological disease other than AD that might affect cognitive function, such as stroke, Parkinson's disease, multiple sclerosis, or serious traumatic brain injury
Minimum Eligible Age

55 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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National Institutes of Health (NIH)

NIH

Sponsor Role collaborator

National Institute on Aging (NIA)

NIH

Sponsor Role collaborator

University of Wisconsin, Madison

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Carey E Gleason, PhD

Role: PRINCIPAL_INVESTIGATOR

University of Wisconsin, Madison

Locations

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University of Wisconsin

Madison, Wisconsin, United States

Site Status

Countries

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United States

References

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Gleason CE, Carlsson CM, Barnet JH, Meade SA, Setchell KD, Atwood CS, Johnson SC, Ries ML, Asthana S. A preliminary study of the safety, feasibility and cognitive efficacy of soy isoflavone supplements in older men and women. Age Ageing. 2009 Jan;38(1):86-93. doi: 10.1093/ageing/afn227. Epub 2008 Dec 2.

Reference Type RESULT
PMID: 19054783 (View on PubMed)

Gleason CE, Fischer BL, Dowling NM, Setchell KD, Atwood CS, Carlsson CM, Asthana S. Cognitive Effects of Soy Isoflavones in Patients with Alzheimer's Disease. J Alzheimers Dis. 2015;47(4):1009-19. doi: 10.3233/JAD-142958.

Reference Type RESULT
PMID: 26401779 (View on PubMed)

Other Identifiers

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5K23AG024302-03

Identifier Type: NIH

Identifier Source: secondary_id

View Link

A534255

Identifier Type: OTHER

Identifier Source: secondary_id

SMPH/MEDICINE/MEDICINE*G

Identifier Type: OTHER

Identifier Source: secondary_id

2003-048

Identifier Type: -

Identifier Source: org_study_id

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