GV1001 Subcutaneous(SC) for the Treatment of Mild to Moderate Alzheimer's Disease (AD)

This is a multicenter, randomized, double-blind, placebo-controlled, parallel-group Phase 2 study in participants with mild to moderate AD. The study will consist of a screening visit (up to 60 days prior to first dose), a 52-week double-blind treatment period, and an end-of-study (EOS) visit 2 weeks after the last dose of study drug. Eligible participants will be randomized in a 1:1:1 ratio to receive GV1001 0.56 mg, GV1001 1.12 mg, or placebo (normal saline) every week for 4 weeks beginning on Day 1 (of Week 1) followed by every 2 weeks through Week 50. Prior to randomization, eligibility of potential participants will be confirmed through an adjudication process in which screening data (eg, MMSE, magnetic resonance imaging \[MRI\] scans, positron emission tomography \[PET\] scans) obtained to evaluate AD status are reviewed by a medical monitor. The medical monitor will review the subject eligibility form completed by the Investigator prior to randomization and provide an independent assessment of the participant's eligibility and may request exclusion of a participant from entry into the study. A central independent reader will review MRI to confirm eligibility. Investigators must not randomize a participant prior to receipt of this independent confirmation of the participant's eligibility. Results from MRI, Aβ positron emission tomography (PET) scan, cerebrospinal fluid (CSF) examination or genetic testings performed within the 2 years prior to screening will also be used to confirm eligibility. If no historical results are available, participants will undergo a MRI or an Aβ PET scan at screening. If a participant discontinues treatment prematurely, the participant will be asked to continue with the scheduled study visits until the EOS visit. If a participant discontinues the study prematurely (except for those who withdraw their consent), the participant will be asked to come for an early termination (ET) visit for efficacy scale and safety assessments. These assessments are the same as those scheduled at the primary endpoint (PE) visit at Week 52. If the ET visit takes place within 4 weeks after a completed protocol scheduled visit with efficacy assessments, efficacy scale assessments are not required at the ET visit. For an individual participant, the maximum duration of study participation is approximately 14.5 months, including an up to 60-day screening period. An independent Data and Safety Monitoring Board (DSMB) review to evaluate safety data will be performed when at least 90 participants (50%) have either completed Week 26 or have discontinued the study. The DSMB may recommend early stopping of the study for safety reasons. Efficacy evaluations will be performed at baseline, Week 12, Week 26, Week 38, and Week 52 using the cognitive subscale of the Alzheimer's Disease Assessment Scale \[ADAS-cog11\]), assessment of activities of daily living (ie, Amsterdam Instrumental Activities of Daily Living Questionnaire \[A-IADL-Q\]), and global ratings of dementia (ie, Clinical Dementia Rating-Sum of Boxes \[CDR-SB\], Neuropsychiatric Inventory \[NPI\], Mini-Mental State Examination \[MMSE\], Alzheimer's Disease Cooperative Study-Clinical Global Impression of Change/Clinician's Interview-Based Impression of Change - Plus Family Input \[ADCS-CGIC/CIBIC-Plus\], and Quality of Life in Alzheimer's Disease \[QoL-AD\]). The ADAS-cog11 scale will be evaluated by a central independent reader for each visit. At the visits where several efficacy assessments are administered, every effort should be made to perform the efficacy evaluations in the same order at each visit (ADAS-cog11, A-IADL-Q, NPI, MMSE, CDR-SB, ADCS-CGIC/CIBIC-Plus, and QoL-AD). Safety will be assessed throughout the study by monitoring for AEs, laboratory evaluations, electrocardiogram (ECG) findings, and vital signs measurements. Suicidal ideation and behavior will be assessed using the C-SSRS. Blood and CSF samples will be collected to evaluate the effect of GV1001 on analysis of biomarkers of AD.