Glucose Metabolic, Amyloid, and Tau Brain Imaging in Down Syndrome and Dementia

NCT ID: NCT00966017

Last Updated: 2009-12-29

Basic Information

• Recruitment Status: UNKNOWN
• Total Enrollment: 108 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2009-07-31
• Study Completion Date: 2014-02-28

Brief Summary

The purpose of this study is to develop small molecule radio-labeled probes of beta-amyloid, to be used with positron emission tomography (PET) for early detection and treatment monitoring of Alzheimer disease (AD). The study hypothesis is that PET imaging of small molecule probes, in the form of novel fluorescent dyes with radioactive labels, will demonstrate cerebral patterns in patients with AD that are distinct from those of age-matched persons who are cognitively intact.

Detailed Description

This is a naturalistic study in which clinical evaluations and brain scans will be performed on 72 people with Down syndrome (DS), 36 non-demented and 36 with dementia, as well as 36 age-matched healthy controls. Participants will receive comprehensive clinical and neuropsychological assessments. PET and MRI scans will be performed at baseline and after two years of follow up. All participants will have blood drawn for APOE genotyping during their baseline evaluations. The intellectual range of participants with DS will be restricted to IQ scores of 45 to 60 (moderate range) to reduce variability, particularly due to extreme low levels of intellectual ability.

Conditions

Down Syndrome; Alzheimer's Disease

Keywords

PET Scan

Study Design

• Observational Model Type: CASE_CONTROL
• Study Time Perspective: RETROSPECTIVE

Study Groups

DS

Those with Down syndrome

No interventions assigned to this group

Non-DS

Healthy controls

No interventions assigned to this group

Eligibility Criteria

Inclusion Criteria

• Age 45 years or older
• No significant cerebrovascular disease - modified Ischemic Score of < 4
• Adequate visual and auditory acuity to allow neuropsychological testing
• Screening laboratory tests and ECG without significant abnormalities that might interfere with the study

• MMSE score between 24 and 30 (unless < 8 years of educational achievement)
• The following medications are allowed if stable for > 1 month: antidepressants (without anticholinergic effects) if not currently depressed and no history of major depression for 2 years; estrogen replacement therapy; thyroid replacement therapy as long as individual is euthyroid; antihypertensives that do not influence cognitive function

• Family member or caregiver available; caregiver relationship 2 years or longer
• Karyotype DX of trisomy or translocation DS Mosaic form of Down syndrome
• English-speaking

Exclusion Criteria

• Evidence of neurological or other physical illness that could produce cognitive deterioration; volunteers with a history of TIAs, carotid bruits, or lacunes on MRI scan will be excluded
• Parkinson's Disease
• History of myocardial infarction within the previous year or unstable cardiac disease
• Uncontrolled hypertension (systolic BP > 170 or diastolic BP > 100), history of significant liver disease, clinically significant pulmonary disease, diabetes, or cancer
• Major psychiatric disorders, such as bipolar disorder or schizophrenia
• Medicines that could influence psychometric test results
• Use of any of the following drugs: centrally active beta-blockers, narcotics, clonidine, anti-Parkinsonian medications, benzodiazepines, systemic corticosteroids, medications with significant cholinergic or anticholinergic effects, anti-convulsants, or warfarin
• Current diagnosis or history of alcoholism or drug dependence
• Evidence of untreated depression or untreated anxiety
• Use of any investigational drugs within the previous month or longer, depending on drug half-life
• Contraindication for MRI scan (e.g., metal in body, claustrophobia)
• Diagnosis of possible or probable AD or any other dementia (e.g., vascular, Lewy body, frontotemporal) or MCI

• Mosaic form of Down syndrome
• History of clinically significant neurological disorder or disease and Psychiatric diagnosis or treatment within 3 months prior to screening

• Minimum Eligible Age: 45 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

National Institute on Aging (NIA)

NIH

Sponsor Role: lead

Responsible Party

Semel Institute for Neuroscience & Human Behavior, David Geffen School of Medicine at UCLA

Principal Investigators

Gary W. Small, MD

Role: PRINCIPAL_INVESTIGATOR

Semel Institute for Neuroscience & Human Behavior, David Geffen School of Medicine at UCLA

Locations

UCLA

Los Angeles, California, United States

Site Status: RECRUITING

Countries

United States

Central Contacts

Andrea Kaplan

Role: CONTACT

Phone: 310-825-0545

Email: akaplan@mednet.ucla.edu

Deborah Dorsey, RN, MN

Role: CONTACT

Phone: 310-825-0545

Email: ddorsey@mednet.ucla.edu

Facility Contacts

Andrea Kaplan

Role: primary

Deborah Dorsey, RN, MN

Role: backup

References

Nelson LD, Scheibel KE, Ringman JM, Sayre JW. An experimental approach to detecting dementia in Down syndrome: a paradigm for Alzheimer's disease. Brain Cogn. 2007 Jun;64(1):92-103. doi: 10.1016/j.bandc.2007.01.003. Epub 2007 Mar 26.

Reference Type: BACKGROUND

PMID: 17383786 (View on PubMed)

Nelson LD, Orme D, Osann K, Lott IT. Neurological changes and emotional functioning in adults with Down Syndrome. J Intellect Disabil Res. 2001 Oct;45(Pt 5):450-6. doi: 10.1046/j.1365-2788.2001.00379.x.

Reference Type: BACKGROUND

PMID: 11679050 (View on PubMed)

Small GW, Kepe V, Ercoli LM, Siddarth P, Bookheimer SY, Miller KJ, Lavretsky H, Burggren AC, Cole GM, Vinters HV, Thompson PM, Huang SC, Satyamurthy N, Phelps ME, Barrio JR. PET of brain amyloid and tau in mild cognitive impairment. N Engl J Med. 2006 Dec 21;355(25):2652-63. doi: 10.1056/NEJMoa054625.

Reference Type: BACKGROUND

PMID: 17182990 (View on PubMed)

Small GW, Siddarth P, Burggren AC, Kepe V, Ercoli LM, Miller KJ, Lavretsky H, Thompson PM, Cole GM, Huang SC, Phelps ME, Bookheimer SY, Barrio JR. Influence of cognitive status, age, and APOE-4 genetic risk on brain FDDNP positron-emission tomography imaging in persons without dementia. Arch Gen Psychiatry. 2009 Jan;66(1):81-7. doi: 10.1001/archgenpsychiatry.2008.516.

Reference Type: BACKGROUND

PMID: 19124691 (View on PubMed)

Other Identifiers

1R01AG033015-01

Identifier Type: NIH

Identifier Source: secondary_id

View Link

IA0167

Identifier Type: -

Identifier Source: org_study_id