A Study to Evaluate the Effects of ACI-7104.056 Vaccination in Patients With Early Stages of Parkinson's Disease (VacSYn)

• ClinicalTrials.gov Identifier: NCT06015841
• Recruitment Status: Recruiting
• First Posted: August 29, 2023
• Last Update Posted: May 1, 2024
• Sponsor: AC Immune SA
• Collaborator: ICON Clinical Research
• Information provided by (Responsible Party): AC Immune SA

Study Description

Brief Summary:

The purpose of this study is to evaluate the safety, tolerability, immunogenicity, and pharmacodynamic effects of ACI-7104.056 vaccination in patients with early stages of Parkinson's disease.

Condition or disease	Intervention/treatment	Phase
Parkinson Disease; Parkinson Disease 6, Early-Onset	Biological: Placebo; Biological: ACI-7104.056 at Dose A; Biological: ACI-7104.056 at Dose B (optional); Biological: ACI-7104.056 at Dose C (optional)	Phase 2

Detailed Description:

This is a prospective, multicenter, placebo-controlled, double-blind, randomized study with adaptive features, comprising a screening period of up to 8 weeks, a 74-week double-blind treatment period, and a 26-week post-treatment follow-up period.

Up to 3 cohorts will include 16 subjects each (12 under the study vaccine and 4 under placebo; 3:1 active treatment/placebo ratio). One of the initial potential 3 cohorts (Cohorts 2 and 3 are optional) may be expanded in order to reach an overall total of up to 150 subjects in the study. In case a cohort is expanded, the randomization ratio will be adjusted to achieve an active treatment/placebo ratio of 2:1 in this cohort.

The route of administration of the study vaccine and placebo will be by intramuscular injections.

Study Design

• Study Type: Interventional (Clinical Trial)
• Estimated Enrollment: 150 participants
• Allocation: Randomized
• Intervention Model: Sequential Assignment
• Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
• Primary Purpose: Treatment
• Official Title: An Adaptive, Phase 2, Double-blind, Randomized, Placebo-controlled, Multicenter Study to Evaluate the Safety, Tolerability, Immunogenicity, and Pharmacodynamic Effects of ACI-7104.056 in Patients With Early Stages of Parkinson's Disease
• Actual Study Start Date: July 24, 2023
• Estimated Primary Completion Date: January 2028
• Estimated Study Completion Date: January 2028

Arms and Interventions

Arm	Intervention/treatment
Placebo Comparator: Placebo; Early PD subjects receive placebo at pre-defined time points over 74 weeks.	Biological: Placebo; The placebo is a solution matching the study vaccine formulation.
Experimental: ACI-7104.056 at Dose A; Early PD subjects receive dose A of ACI-7104.056 at pre-defined time points over 74 weeks.	Biological: ACI-7104.056 at Dose A; The study vaccine (ACI-7104.056) consists of an adjuvanted protein peptide conjugate vaccine.
Experimental: ACI-7104.056 at Dose B (optional); Early PD subjects receive dose B of ACI-7104.056 at pre-defined time points over 74 weeks. This arm is optional.	Biological: ACI-7104.056 at Dose B (optional); The study vaccine (ACI-7104.056) consists of an adjuvanted protein peptide conjugate vaccine.
Experimental: ACI-7104.056 at Dose C (optional); Early PD subjects receive dose C of ACI-7104.056 at pre-defined time points over 74 weeks. This arm is optional.	Biological: ACI-7104.056 at Dose C (optional); The study vaccine (ACI-7104.056) consists of an adjuvanted protein peptide conjugate vaccine.

Outcome Measures

Primary Outcome Measures :

1. Number of participants with Adverse Events (AEs) assessed by intensity (mild, moderate or severe) and causal relationship (unrelated, or unlikely, possibly, probably or definitely related) [ Time Frame: From Screening (ICF signature) to Week 100 ]
2. Number of participants with abnormal MRI results [ Time Frame: From Baseline to Week 100 ]
3. Number of participants with clinically significant changes in physical and neurological examination results [ Time Frame: From Baseline to Week 74 ]
4. Number of participants reporting suicidal ideation or behavior using Columbia-Suicide Severity Rating Scale (C-SSRS) [ Time Frame: From Baseline to Week 100 ]
5. Measurement of levels of specific antibodies against a-synuclein present in serum generated by ACI-7104.056 [ Time Frame: From Baseline to Week 100 ]

Secondary Outcome Measures :

1. Measures of alpha-synuclein (a-syn) related biofluid biomarkers [ Time Frame: From Baseline to Week 100 ]
2. Measurement of levels of dopamine transporter proteins in specific brain regions, notably substantia nigra, by Dopamine Transporter-Single Photon Emission Computerized Tomography (DaT-SPECT) imaging [ Time Frame: From Baseline to Week 100 ]
3. Change from baseline in Movement Disorder Society-Unified Parkinson's Disease Rating Scale (MDS-UPDRS) Part III [ Time Frame: From Baseline to Week 100 ]

Other Outcome Measures:

1. Change in motor and nonmotor functions using the Movement Disorder Society-Unified Parkinson's Disease Rating Scale (MDS-UPDRS) [ Time Frame: From Baseline to Week 100 ]

Eligibility Criteria

• Ages Eligible for Study: 40 Years to 75 Years (Adult, Older Adult)
• Sexes Eligible for Study: All
• Accepts Healthy Volunteers: No

Criteria

Inclusion criteria:

1. Confirmed diagnosis of clinically established early PD using the modified Movement Disorder Society criteria, after excluding any other known or suspected cause of PD. The presence of motor symptoms should not be of more than 2 years at screening.
2. Monotherapy treatment with L-Dopa at 300 mg per day, with a stable dose prior to baseline for 3 months. The subject has a reasonably low likelihood of requiring dose adjustment within the next 6 to 12 months after enrolment. Any exception to this rule has to be previously agreed with the Sponsor medical monitor.
3. Male or female.
4. Aged ≥40 to ≤75 years.
5. Body weight range of ≥45 kg to ≤110 kg (99 to 242 lbs) and a body mass index of ≥18 to ≤34 kg/m2.
6. Modified Hoehn-Yahr (H&Y) Stage I to II.
7. A centrally read screening brain DaT-SPECT consistent with PD.
8. Subjects can understand the informed consent form, are able and willing to provide written informed consent, and can be expected to comply with the study protocol according to the International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use and local regulations.
9. Female participants must be postmenopausal for at least 1 year and/or surgically sterilized, or, if they are female of childbearing potential or not postmenopausal, they must have a negative blood pregnancy test at screening and be willing to use highly effective methods of contraception from the screening visit until the end of the safety follow-up period (approximately 108 weeks). Male participants in the trial with female partners of childbearing potential are required to use barrier methods of contraception (condoms with spermicide) in addition to contraceptive measures used by female partners during the whole study duration. Men must refrain from donating sperm during this same period. The female partners should use a highly effective method of contraception with a failure rate of less than 1% per year from screening until the end of the safety follow-up period (approximately 108 weeks). The reliability of sexual abstinence should be evaluated in relation to the duration of the clinical trial and the preferred and usual lifestyle of the subject. Periodic abstinence (eg, calendar, ovulation, symptothermal, or postovulation methods) and withdrawal are not acceptable methods of contraception.

Exclusion criteria:

1. Medical history indicating a Parkinsonian syndrome other than idiopathic PD, including but not limited to, progressive supranuclear palsy, multiple system atrophy, drug induced parkinsonism, essential tremor, vascular parkinsonism, primary dystonia.
2. Known carriers of certain familial PD gene mutations (PRKN, PINK1, DJ1, LRRK2).
3. History of PD-related freezing episodes or falls.
4. History of brain surgery or any neurosurgical procedures.
5. Reside in a nursing home or assisted care facility.
6. A history of cancer within 5 years of baseline with the exception of fully excised non melanoma skin cancers or nonmetastatic prostate cancer that has been stable for at least 6 months, or cervical intraepithelial neoplasia stage I uterine cancer.
7. History of and/or screening brain MRI scan indicative of, clinically significant abnormality including but not limited to prior hemorrhage or infarct >1 cm3 or >3 lacunar infarcts.
8. Diagnosis of a significant central nervous system disease other than PD (including but not limited to Huntington's disease, normal pressure hydrocephalus, cerebrovascular disease including stroke, fronto-temporal dementia, Alzheimer's disease, dementia with Lewy bodies, multiple sclerosis, brain tumor); history of repeated head injury; history of epilepsy or seizure disorder other than febrile seizures as a child.
9. Presence of psychiatric symptoms (eg, confusion, hallucination, delusion, excitation, delirium, abnormal behavior at screening and baseline). Note: mild depression, depressive mood, or mild anxiety arising in the context of PD are not exclusionary.

10. Clinically significant concomitant disease or condition within 6 months prior to screening, or as specified below, that could interfere with the conduct of the study, or that would, in the opinion of the investigator, pose an unacceptable risk to the study participant:

    1. Autoimmune disease (except well controlled conditions as specified in the study protocol with decision making on a case per case basis).
    2. Any active infectious disease and/or any febrile illness (including noninfectious) within 1 week prior to first dose administration.
    3. Any current psychiatric diagnosis that may interfere with the participant's ability to perform the study.
    4. Women who are pregnant or breastfeeding or intending to become pregnant during the study.
    5. Myocardial infarction within 12 months of baseline.
    6. Known history or documentation of uncontrolled hypotension or bradycardia on more than 1 occasion within 3 months prior to baseline and known history or documentation of uncontrolled hypertension on more than 1 occasion within 3 months prior to baseline (up to Principal Investigator's discretion). Resting pulse rate >100 or <45 bpm. A QT interval corrected using Fridericia's formula measurement of 450 ms for males or 470 ms for females at screening or a family history of long QT-syndrome. Intermittent second or third degree atrioventricular (AV) heart block or AV dissociation or any other clinically significant cardiovascular disease.
    7. Clinically significant abnormalities in laboratory test results at the screening visit (specified in more detail in a separate document), positive result for acute or chronic infectious Hepatitis B virus (HBV; [ie, Hepatitis B surface antigen (HBsAg) positive test]), for Hepatitis C virus (HCV), or for Human Immunodeficiency Virus (HIV) 1 or 2. Successfully treated subjects with HCV (undetectable HCV RNA) are eligible for enrolment. Participants who are immune due to HBV natural infection or HBV vaccination are eligible.
    8. Use of any of the following: monoamine oxidase (MAO)-B inhibitors, catechol-O-methyl transferase (COMT) inhibitors (eg, entacapone, opicapone, tolcapone), amantadine, adenosine A2a antagonists or anticholinergics, or dopaminergic medication (both ergot and nonergot [pramipexole, ropinirole, rotigotine] dopamine agonists) for more than a total of 90 days or within 90 days of baseline.
    9. Antiepileptic medication (eg, valproate) for nonseizure-related treatment that has not remained stable for at least 60 days prior to baseline.
    10. Antidepressant use that has not remained stable for at least 2 months prior to baseline.
    11. Use of any of the following medications within 90 days prior to baseline: metoclopramide, alpha methyldopa, flunarizine, amoxapine, amphetamine derivatives, reserpine, bupropion, buspirone, cocaine, cannabis, mazindol, methamphetamine, methylphenidate, phentermine, phenylpropanolamine, and modafinil. Exceptional use of norephedrine is allowed (eg, treatment for a cold).
    12. Previous participation in a clinical trial using an active immunotherapy against PD, unless there is firm evidence that the subject received placebo only and the placebo formulation is not expected to induce any specific immune response.
    13. Previous treatment with any investigational and/or marketed passive immunotherapy against PD within 6 months before screening or 5 half-lives, whichever is longer, unless there is firm evidence that the subject received placebo only (in the case of any investigational product administered within the frame of a clinical trial participation).
    14. Participation in previous clinical trials for PD and/or for neurological disorders using any small molecule drug with a washout <30 days or <5 half lives of the drug, whichever is longer before screening, unless there is firm evidence that the subject received placebo only.
    15. Concomitant participation in any other clinical trial using experimental or approved medications or therapies (eg, device, stem cell). This does not include noninterventional devices for disease tracking or imaging studies.
    16. Immunomodulating and immunosuppressant drugs including oral corticosteroids within 30 days prior to baseline.
    17. Allergy to any of the components of the study vaccine.
    18. Any contraindications to obtaining a brain MRI or DaT-SPECT, getting a lumbar puncture or receiving IM injections.
11. Current, or history of, alcohol or drug (including cannabis) abuse or other dependence (except nicotine dependence) within 12 months before screening.
12. Subjects with known hypersensitivity to the study vaccine or placebo components.
13. Subjects who previously received a vaccination (ie, influenza vaccine and COVID 19) within the last 4 weeks prior to randomization or standard-of-care immunizations within the last 2 weeks prior to randomization.
14. Subjects being treated with any anticoagulants or antiplatelet drugs, except aspirin at doses of 100 mg daily or lower.

Contacts and Locations

Contacts

Contact: Olivier Sol; +41 21 345 91 21; clinicaltrials@acimmune.com

Contact: Tanja Touilloux; +41 21 345 91 21; clinicaltrials@acimmune.com

Locations

Germany

Katholisches Klinikum Bochum GmbH; Active, not recruiting

Bochum, Germany

Paracelsus-Kliniken Deutschland GmbH & Co. KGaA; Not yet recruiting

Kassel, Germany

University Medical Centre Schleswig-Holstein; Recruiting

Kiel, Germany

Spain

Hospital De La Santa Creu I Sant Pau; Recruiting

Barcelona, Spain

Hospital Universitari Vall D Hebron; Recruiting

Barcelona, Spain

Policlinica Gipuzkoa; Recruiting

Donostia, Spain

Hospital Universitario De La Princesa; Recruiting

Madrid, Spain

Hospital Universitario Puerta De Hierro De Majadahonda; Recruiting

Majadahonda, Spain

Hospital Universitario Quironsalud Madrid; Recruiting

Pozuelo De Alarcón, Spain

United Kingdom

King's College Hospital NHS Foundation Trust; Recruiting

London, United Kingdom

Re:Cognition Health Limited; Recruiting

London, United Kingdom

Northern Care Alliance NHS Foundation Trust; Recruiting

Salford, United Kingdom

Sponsors and Collaborators

AC Immune SA

ICON Clinical Research

Investigators

• Study Chair: Daniela Berg, Prof.; Klinik für Neurologie, UKSH Campus Kiel, Germany

More Information

Publications of Results:

Volc D, Poewe W, Kutzelnigg A, Luhrs P, Thun-Hohenstein C, Schneeberger A, Galabova G, Majbour N, Vaikath N, El-Agnaf O, Winter D, Mihailovska E, Mairhofer A, Schwenke C, Staffler G, Medori R. Safety and immunogenicity of the alpha-synuclein active immunotherapeutic PD01A in patients with Parkinson's disease: a randomised, single-blinded, phase 1 trial. Lancet Neurol. 2020 Jul;19(7):591-600. doi: 10.1016/S1474-4422(20)30136-8.

• Responsible Party: AC Immune SA
• ClinicalTrials.gov Identifier: NCT06015841
• Other Study ID Numbers: ACI-7104-PD-2103; 2022-500292-31-00 ( Other Identifier: European Union Clinical Trials Register ); 1006102 ( Other Identifier: Integrated Research Application System )
• First Posted: August 29, 2023
• Last Update Posted: May 1, 2024
• Last Verified: April 2024

Individual Participant Data (IPD) Sharing Statement:

• Plan to Share IPD: Undecided

• Studies a U.S. FDA-regulated Drug Product: No
• Studies a U.S. FDA-regulated Device Product: No

Keywords provided by AC Immune SA:

Early Parkinson's disease

Additional relevant MeSH terms:

Parkinson Disease; Parkinsonian Disorders; Basal Ganglia Diseases; Brain Diseases; Central Nervous System Diseases; Nervous System Diseases; Movement Disorders; Synucleinopathies; Neurodegenerative Diseases