Trial-Ready Cohort-Down Syndrome (TRC-DS)

The purpose of the Trial-Ready Cohort - Down Syndrome (TRC-DS) is to enroll 120 healthy adults with Down syndrome (DS), between the ages of 25-55, into a trial ready cohort (TRC), and up to 550 participants in total including co-enrolled in the Alzheimer Biomarkers Consortium - Down Syndrome (ABC-DS) study. Participants enrolled in the TRC-DS will undergo longitudinal cognitive and clinical assessment, genetic and biomarker testing, as well as imaging and biospecimen collection. Using these outcome measures, researchers will analyze the relationships between cognitive measures and biomarkers of Alzheimer's disease…

• : 1. Diagnosis of DS (including trisomy 21, mosaic trisomy 21, Robertsonian translocation trisomy 21 or partial trisomy 21) (as confirmed by genetic testing or medical record review) 2. Provision of signed and dated informed consent form; this includes adults with DS who can provide consent, or for whom an LAR provides consent on behalf of the individual to participate. Adults with DS who cannot consent must sign and date an assent accompanied with a signed and dated consent by legally authorized representative (LAR). 3. Stated availability and willingness to comply with all study procedures and availability for the duration of the study or until referred to a clinical trial 4. Male or female, aged 25-55 inclusive 5. In good general health as evidenced by medical history with no diagnosis of dementia 6. Permitted CNS-active medications, stable in dose for at least 4 weeks or longer. If new medications have been started, medical monitoring team will review on case by case basis to recommend timing of baseline cognitive testing 7. Adequate visual and auditory acuity to allow neuropsychological testing 8. Mental Age of 4 years or greater (based upon the Kaufman Brief Intelligence Test, Second Edition, KBIT-2, verbal age…

Use the source registry for the full inclusion and exclusion criteria before discussing referral or enrolment.