A Study of LY2886721 in Healthy Participants and Participants Diagnosed With Alzheimer's Disease

Study Overview
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Brief Summary
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This study is being done for the following reasons: To determine the safety of LY2886721 and any side effects that may be associated with it and to see how much of the study drug is in the blood and the cerebrospinal fluid (CSF) when one dose is given to healthy participants and participants diagnosed with Alzheimer's disease. It will also look at how safe and tolerable the study drug is when given to healthy participants in higher doses. This research study is being conducted in three groups, referred to as Groups (Cohorts) A, B, or C. Group A will enroll participants with Alzheimer's disease while Groups B and C will enroll healthy participants. For Group A or B, participation in this research study could last up to 34 days. For Group C, participation could last up to 60 days.

Official Title
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A Safety, Pharmacokinetic, and Pharmacodynamic Study of LY2886721 in Healthy Subjects and Patients Diagnosed With Alzheimer's Disease

Conditions
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Alzheimer Disease, Healthy Volunteers

Intervention / Treatment
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* Drug: LY2886721
* Drug: Placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Healthy participants have a body mass index (BMI) of 19 to 32 kilograms per square meter (kg/m^2), inclusive, at screening. There are no restrictions on BMI in participants diagnosed with Alzheimer's disease. Healthy participants should not be taking any concomitant medications. For participants with Alzheimer's disease, concomitant medications will be determined by the investigator in consultation with the Lilly clinical pharmacologist on an individual basis. Cohort A: Participants are defined as otherwise healthy males or females as determined by medical history and physical examination, and a diagnosis of Alzheimer's disease and must be at least 45 years of age. Meets National Institute of Neurological and Communicative Disorders and Stroke/Alzheimer's Disease and Related Disorders Association (NINCDS/ADRDA) criteria for probable Alzheimer's disease, as determined by a clinician approved by the sponsor or designee. Mini Mental State Examination (MMSE) score of 16 through 28 at screening. Modified Hachinski Ischemia Scale (MHIS) score of <4. Capable of understanding and signing their own informed consent, in the opinion of the investigator, or if the participant has a Legally Authorized Representative (LAR), then the LAR must be capable of understanding and signing the assent form, and the participant may or may not sign the informed consent, as to be determined by the investigator. If receiving concurrent treatment with an acetylcholinesterase inhibitor (AChEI) and/or memantine, the participant has been on a stable dose for at least 4 weeks before Day 1. Dosing must remain stable throughout the study. Note: If a participant has recently stopped ACHEIs and/or memantine, he or she must have discontinued treatment for at least 4 weeks before Day 1. Exclusion Criteria: Have an abnormality in the 12-lead electrocardiogram (ECG). Have abnormal blood pressure. Have abnormal thyroid function as reflected by thyroid stimulating hormone (TSH) values outside of the normal range. Show evidence of human immunodeficiency virus (HIV) infection and/or positive HIV antibodies. Show evidence of hepatitis C and/or positive hepatitis C antibody. Have had multiple episodes of head trauma, or have a history within the last 5 years of a serious infectious disease affecting the brain. Have chronic hepatic disease. Have evidence or history of significant active bleeding or a coagulation disorder. Cohort A: have any neurological disorders other than Alzheimer's disease. For healthy participants (Cohorts B and C) only: Use or intend to use over the- counter or prescription medication, including herbal medications within 14 days prior to dosing or during the study.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Basic Science
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Cohort A: 70 mg LY2886721<br>Participants with Alzheimer's disease received a single, 70-milligrams (mg) (1 capsule), oral dose of LY2886721. | Drug: LY2886721<br> <br> |
| Placebo Comparator: Cohort A: Placebo<br>Participants with Alzheimer's disease received a single, oral dose of LY2886721-matching placebo (1 capsule). | Drug: Placebo<br> <br> |
| Experimental: Cohort B: 70 mg LY2886721<br>Healthy participants received a single, 70-mg (1 capsule), oral dose of LY2886721. | Drug: LY2886721<br> <br> |
| Placebo Comparator: Cohort B: Placebo<br>Healthy participants received a single, oral dose of LY2886721-matching placebo (1 capsule). | Drug: Placebo<br> <br> |
| Experimental: Cohort C: 280 mg LY2886721<br>Healthy participants received a single, 280-mg (4 x 70 mg capsules), oral dose of LY2886721. | Drug: LY2886721<br> <br> |
| Placebo Comparator: Cohort C: Placebo<br>Healthy participants received a single, oral dose of LY2886721-matching placebo (4 capsules). | Drug: Placebo<br> <br> |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Pharmacokinetics: Area Under the Curve Extrapolated to Infinity (AUC0-∞) of Plasma LY2886721 | AUC0-∞ following administration of a single dose of 70 or 280 mg LY2886721. | Predose through 96 hours after administration of study drug | 
| Pharmacokinetics: Maximum Concentration (Cmax) of Plasma LY2886721 | Cmax following administration of a single dose of 70 or 280 mg LY2886721. | Predose through 96 hours after administration of study drug | 
| Pharmacokinetics: Area Under the Curve Extrapolated to Infinity (AUC0-∞) of Cerebrospinal Fluid (CSF) LY2886721 | AUC0-∞ following administration of a single dose of 70 mg LY2886721. | Predose through 36 hours after administration of study drug | 
| Pharmacokinetics: Maximum Concentration (Cmax) of CSF LY2886721 | Cmax following administration of a single dose of 70 mg LY2886721. | Predose through 36 hours after administration of study drug | 
| Pharmacodynamics (PD): Cnadir of Plasma Amyloid β (Aβ)1-40 | Plasma concentration of Aβ1-40 was summarized based on lowest observed concentration (Cnadir). | Predose, up to 96 hours after administration of study drug | 
| PD: Cnadir of CSF Aβ 1-40 | Plasma concentration of Aβ1-40 was summarized based on Cnadir following administration of a single dose of 70 mg LY2886721 or a single dose of LY2886721-matching placebo. | Predose up to 36 hours after administration of study drug | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Cohort C: Mean QTcF Value at Cmax | The mean QTcF value at Cmax for participants administered a single dose of 280 mg LY2886721 was reported. The QT interval is a measure of the time between the start of the Q wave and the end of the T wave and was calculated from electrocardiogram (ECG) data using Fridericia's formula: QTc = QT/RR^0.33. Corrected QT (QTc) is the QT interval corrected for heart rate and RR, which is the interval between two R waves. Time matched mean change from baseline in QTcF = time matched plasma concentration + participant + random error. | Predose up to 48 hours after administration of study drug |