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

1. Male or female participants 55 to 85 years of age (both inclusive) at the time of signing the informed consent.

2. Diagnosis of probable AD based on NINCDS-ADRDA criteria (a and b) as determined by a neurologist, geriatrician, psychiatrist, or clinician approved by the Sponsor or designee.

a. Presence of an early and significant episodic memory impairment that includes the following features: i. Gradual and progressive change in memory function reported by patients or informants over >6months.

ii. Objective evidence of significantly impaired episodic memory on testing: this generally consists of recall deficit that does not improve significantly or does not normalize with cueing or recognition testing and after effective encoding of information has been previously controlled.

iii. The episodic memory impairment can be isolated or associated with other cognitive changes at the onset of AD or as AD advances.

b. One or more findings for probable AD by either MRI, Aβ PET scan, historical CSF results, or a historical genetic test in the 2 years before screening, or an MRI or Aβ PET scan at screening. The MRI must have findings consistent with AD and without any other disease that may cause dementia. The Aβ PET scan and historical CSF results must be consistent with the presence of amyloid pathology.

3. Mild or moderate dementia as evidenced by MMSE score ≥13 to ≤24 at screening (Visit 1).

4. Not applicable.

5. Not applicable.

6. If receiving an approved medication for AD (ie, donepezil, galantamine, rivastigmine, memantine, or memantine/donepezil combination product), must be on the medication with a stable dose for at least 12 weeks before the screening visit (dosing should remain stable throughout the study).

7. If receiving an OTC supplement for cognition (eg, gingko biloba, omega-3 polyunsaturated fatty acid, vitamin E, curcumin), must not be exceeding the recommended dose for at least 12 weeks prior to screening visit.

8. Able to visit the study center and undergo cognitive, functional, and other tests specified in the protocol.

9. Has a caregiver who:

10. A male participant must agree to use a highly effective contraception method as detailed in Appendix 3 during the treatment period and for at least 3 months after the last dose of study treatment and refrain from donating sperm during this period.

11. A female participant is eligible to participate if she is not pregnant, not breastfeeding, and at least one of the following conditions applies:

12. A WOCBP must have a negative serum pregnancy test (beta-human chorionic gonadotropin [β-hCG]) at screening (Visit 1) and a negative urine pregnancy test at Visit 2 before randomization, and must use medically accepted means of contraception throughout the study.

13. Written informed consent provided by participant (or legal representative) and caregiver prior to any study-specific procedures.

14. Participants in France must belong to a social security scheme

1. Any other cause of dementia shown by MRI/CT findings within 2 years of screening and neurological examination at screening and Day 1.

2. Concurrent or history of schizophrenia or bipolar disorder; OR any other clinically significant psychiatric conditions that in the Investigator's opinion prevents the participant from participating, or is likely to confound interpretation of drug effect or affect cognitive assessments or participant safety; OR the presence or history of suicidal attempts or suicidal ideation evidenced by endorsing Items 4 or 5 of the C-SSRS at screening or Day 1, endorsing any suicidal behavior item on the C-SSRS Since Last Visit form on Day 1, or any suicide attempt within 2 years prior to screening.

3. Vitamin B12, folic acid, syphilis serology, and thyroid stimulating hormone (TSH) results that are thought to contribute to the severity of dementia or cause dementia. Participants may be enrolled if in the Investigator's medical judgment, the abnormal laboratory values are not the cause of the cognitive symptoms.

4. History of known or suspected seizures including febrile seizures (excluding self-limited childhood febrile seizures), a history of significant head trauma with loss of consciousness or recent unconsciousness that is not explained.

5. Acute or unstable cardiovascular disease, active peptic ulcer, uncontrolled hypertension, uncontrolled diabetes or insulin dependent patients or any medical condition that may interfere with the completion of the clinical study.

6. Known allergies, hypersensitivity, or intolerance to GV1001 or similar products or excipients.

7. History of alcohol, substance abuse or dependence as per DSM-V criteria (except nicotine dependence) within the last 2 years.

8. Concurrent malignancies or invasive cancers diagnosed within the past 5 years except for non-metastatic basal cell carcinoma or squamous cell carcinoma of skin, in situ carcinoma of the uterine cervix or non-metastatic prostate cancer.

9. Sexually-active WOCBP or man capable of fathering a child who do not consent to using medicinally acceptable contraception (such as surgical sterilization, intrauterine contraceptive device, condom or diaphragm, an injectable or inserted contraceptive) during the study and for 3 months after the last dose of study treatment.

10. Pregnant, breast feeding, or planning a pregnancy or fathering a child while enrolled in the study or for 3 months after the last dose of study treatment.

11. Use of anxiolytics, narcotics, or sleep aids in a manner that would interfere with cognitive testing, in the opinion of the Investigator. Atypical antipsychotics may be used at the discretion of the Investigator. Tricyclic antidepressants and monoamine oxidase (MAO) inhibitors are prohibited

12. Previous treatment with GV1001.

13. Received an investigational product for AD within the last 6 months.

14. Participated in another clinical study within 4 weeks prior to this study.

15. Treated with aducanumab or participated in a clinical study with aducanumab.

16. Renal impairment (creatinine clearance [CrCL] <30 mL/min).

17. Severe liver dysfunction (alanine aminotransferase [ALT] or aspartate aminotransferase [AST] >2 times the upper limit of normal [ULN]).

18. Body weight ≤35 kg.

19. Resides in a moderate to high dependency continuous care facility (residence in low grade assisted living facility where there is sufficient autonomy to permit valid evaluation of activities of daily living is allowed).

20. Any other reason that in the opinion of the Investigator would make the participant ineligible to participate or to complete this study.

[Additional Exclusion Criterion for Sites in France]

21. Patients deprived of their liberty by a judicial or administrative decision, and/or persons under psychiatric care within the meaning of Article L1121-6 of the Public Health Code.