AzTrials
AzTrials

Healthy ParticipantsPhase 1NCT07463196

A Study Investigating the Safety, Absorption, Elimination, and the Effect on the Immune System of ACI-19764 in Healthy Participants and in Participants With Cardiovascular Risk Factors

A Phase 1 study testing ACI-19764 at dose A1, ACI-19764 at dose A2 and ACI-19764 at dose A3 in people with Healthy Participants and Obesity, run by AC Immune SA at 1 site in Netherlands.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
Search all trials

Trial summary

The main purposes of this study are: to investigate the safety and tolerability of ACI-19764 when it is administered to healthy participants and participants with cardiovascular risk factors to determine how quickly and to what extent ACI-19764 is absorbed, transported, metabolized, and excreted by the body (fasted… Read more about this study

Who is it for?
Ages 18 to 75 yearsHealthy volunteers can take part
What is being tested?
ACI-19764 at dose A1, ACI-19764 at dose A2 and ACI-19764 at dose A3
Type of treatment
Pill or oral medicine
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
114 participants
Where
1 siteNetherlands
Study dates
28 Jan 2026to Dec 2026
Phase
Phase 1
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 75 years
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • Signed informed consent in a language understandable to the participant prior to any study-mandated procedure.
  • Healthy male (Parts A and B) or female (Part B) aged between 18 and 65 years (inclusive) at screening or, male or female with cardiovascular risk factors between 18 and 75 years (inclusive) (Part C).
  • For Parts A and B: Body mass index of 18.0 to 29.9 kg/m2 (inclusive) at screening.
  • For Part C: Presence of either obesity (defined as a BMI of 30.0-42.0 kg/m2 inclusive) and/or existing diagnosis of well controlled type II diabetes (with HbA1c >6.5% or 48 mmol/mol and ≤8.5% or 69 mmol/mol) (for participants with diabetes the BMI can range between 18.0-42.0 kg/m2 inclusive).
  • For Part C: serum CRP >3.0 mg/L and <10.0 mg/L at screening and reconfirmed prior first dosing.
  • Ability to communicate well with the investigator, and to understand and comply with the study requirements.
Show all 14Show fewer
  • Systolic blood pressure (SBP) 90-140 mmHg, diastolic blood pressure (DBP) 45-90 mmHg, and pulse rate 40 to 100 beats per minute (bpm) (all inclusive), measured on either arm (same arm used for both screening and admission), after 5 min in the supine position at screening and admission. For Part C: SBP may be 90-160 mmHg, and DBP 45-100 mmHg (all inclusive).
  • 12-lead safety ECG: QT interval corrected for HR using Fridericia's formula (QTcF) <450 ms for male participants and <470 ms for female participants, QRS interval <120 ms, PR interval <220 ms, and HR 40 to 100 bpm (inclusive), and without clinically relevant abnormalities, measured after 5 min in the supine position at screening and admission.
  • For Part C: Estimated glomerular filtration rate (eGFR) >60 mL/min/1.73 m2
  • Fertile male participants (defined as physiologically capable of conceiving a child according to the investigator's judgment) must agree to refrain from fathering a child and:
  • Be sexually abstinent with women of childbearing potential (WoCBP) or use condoms during sexual intercourse with WoCBP from (first) study treatment administration up to at least 90 days after (last) study treatment administration. Male participants must advise their WoCBP partners consistently to use a highly effective method of contraception with a failure rate of <1% per year.
  • Do not donate sperm from (first) study treatment administration up to at least 90 days after (last) study treatment administration.
  • Parts B and C only: Female participants must have a negative serum pregnancy test at screening and a negative urine pregnancy test at admission and a follicle-stimulating hormone (FSH) test must be performed at screening. WoCBP must agree to consistently and correctly use (from screening, during the entire study, and for at least 30 days after the last study treatment administration) a highly effective method of contraception with a failure rate of <1% per year, be sexually inactive, or have a vasectomized partner with a post-vasectomy semen analysis negative for sperm at least 6 months before screening. If a hormonal contraceptive is used, it must be initiated at least 1 month before the first study treatment administration and should be used in conjunction with barrier methods. WoCBP must agree to not donate eggs from screening until at least 30 days after the last study treatment administration.
  • Parts B and C only: WoNCBP must be postmenopausal or have documented previous bilateral salpingectomy, bilateral salpingo-oophorectomy or hysterectomy, or with premature ovarian failure (confirmed by a specialist), XY genotype, uterine agenesis.

Who cannot join

  • Known hypersensitivity to any excipient of the ACI-19764 formulations.
  • Known clinically relevant hypersensitivity or allergy to any therapeutic treatment (including non-steroidal anti-inflammatory drugs [NSAIDs], or nucleotide-binding oligomerization domain-like receptor family pyrin domain-containing 3 [NLRP3] inhibitors), vaccines, cosmetics, natural rubber or latex and/or food.
  • Clinically relevant findings on the physical examination at screening or on Day -1.
  • Clinically relevant findings in clinical laboratory tests
  • Clinically relevant history or presence of rhythm disorders, congestive heart failure, or structural heart disease.
  • History or presence of clinically relevant surgical intervention which, in the opinion of the investigator, could potentially interfere with the safety/tolerability and/or absorption, distribution, metabolism, and excretion (ADME) of the study treatment.
Show all 37Show fewer
  • History or presence of acute, ongoing, recurrent, or chronic clinically relevant diseases which, in the opinion of the investigator, could potentially interfere with the assessment of safety/tolerability and/or ADME of the study treatment. For Part C: obesity, well-controlled type 2 diabetes, well-controlled hypertension, hypercholesterolemia, and osteoarthritis are acceptable co-morbidities.
  • For Part C: occurrence of diabetic ketoacidosis within the last 3 months
  • History or current acute or chronic pulmonary pathology including but not limited to chronic obstructive pulmonary disease (COPD), asthma, and recurrent lung infections.
  • Lifetime history of suicide attempt (including active attempt, interrupted attempt or aborted attempt) or suicidal ideation in the past 6 months according to the C-SSRS at screening (Parts B and C only).
  • History of cancer within the past 5 years other than treated squamous cell carcinoma, basal cell carcinoma, and melanoma in situ, or in-situ prostate cancer, in-situ cervix carcinoma, or in-situ breast cancer which have been fully removed and are considered cured.
  • Previous unexplained history of recurrent pre-syncope or syncope with no clear provoking features or syncope in the context of medical investigations that is likely to complicate interpretation of the safety of the drug in the opinion of the Investigator.
  • Veins unsuitable for intravenous (i.v.) puncture on both arms.
  • Participation in a clinical study involving study treatment administration within 3 months (or within 5 half-lives before screening, whichever is longer) prior to (the first) study treatment administration or in more than 3 clinical studies within 1 year prior to (the first) study treatment administration.
  • History or clinical evidence of alcoholism or drug abuse within the 3-year period prior to screening.
  • Consumption of >14 units of alcohol per week (females) or >21 units per week (males).
  • Excessive caffeine consumption.
  • Nicotine consumption from 3 months prior to (first) study treatment administration, checked at screening and on Day -1.
  • Loss (including donation) of 450 mL or more of blood or blood products within 2 months prior to (the first) study treatment administration.
  • Positive results from serum/urine drug or alcohol screen test at screening or on Day -1.
  • Positive hepatitis B and/or C serology results, except for vaccinated participants or those with past but resolved hepatitis, at screening.
  • Positive human immunodeficiency virus (HIV) serology results at screening.
  • Any circumstances or conditions which, in the opinion of the investigator, may affect full participation in the study or compliance with the protocol.
  • Legal incapacity or limited legal capacity at screening.
  • Treatment or intended treatment with any prescribed medications within 2 weeks prior to (first) study treatment administration, except for contraceptives (including hormonal contraceptive devices) in female participants (Part B and C only), and/or over-the-counter (OTC) medications (including herbal medicines such as St John's Wort, homeopathic preparations, vitamins, and minerals) within 1 week prior to (first) study treatment administration. Analgesia with paracetamol is acceptable (but not NSAIDs or aspirin >75 mg per day), unless for the short-term treatment of post lumbar puncture (LP) headache. For Part C: prescribed and OTC (including vitamins and minerals) are permitted (apart from exceptions listed below) provided they have been on a stable dose in the 3 months prior to screening.
  • Any immunosuppressive therapies within 2 months or 5 half-lives (whichever is longer) prior to first study treatment administration.
  • Current or recent use (within 1 month or 5 half-lives whichever is longer) of glucagon-like peptide-1 (GLP1) receptor agonists.
  • Any biological compound for research or medical reasons within 12 months prior to (first) study treatment administration.
  • Any relevant bacterial, viral, fungal, or protozoal infection that manifested within the last 6 weeks prior to screening and/or an ongoing relevant bacterial, viral, fungal, or protozoal infection, as judged by the investigator, and/or evidence of immune dysfunction based on laboratory tests at screening. If mild infections occur during screening causing a rise in C-reactive protein (CRP), that is ≥10.0 mg/L, the participant should not be included until this has normalized.
  • Receipt of vaccine within 5 weeks prior to admission.
  • Any medical history of an active tuberculosis (TB) infection, positive test result for latent TB in the last 2 years, or any contact with TB-positive individuals in the last 4 weeks prior to screening.
  • Potential anticipated lack of compliance with study assessments and visit schedule.
  • Planned hospitalization (other than for study assessments) or surgery during the study.
  • Part A Food effect cohort only: Inability or unwillingness to completely consume the high-fat breakfast prior to study treatment administration.
  • Parts B and C only: Pregnant or lactating women.
  • Part B (for those undergoing LP): Contraindications for LP including, but not limited to space-occupying lesions with mass effect or raised intracranial pressure, posterior fossa mass, anticoagulant or antiplatelet medications, coagulopathy, thrombocytopenia (<150×109/L), congenital spine abnormality, skin infection at the LP site or tattoo covering puncture site.
  • Part B (for those undergoing LP): Lower back pain at the time of the study or history of recurrent headaches in the last 6 months (more than 4 days a month of headaches that limit normal daily activity)

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

AC Immune Clinical Lead contact

+41213459121

clinicaltrials@acimmune.com

Netherlands1 site, 1 recruiting
  • ICON

    Groningen, 9728 NZ

    Recruiting

Other trials in Netherlands

About this study

Official title: A Single-Center, Double-Blind, Randomized, Placebo-Controlled Phase 1 Study to Investigate the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of Single- and Multiple-Ascending Doses of ACI-19764 in Healthy Participants and in Participants With Cardiovascular Risk Factors

The main purposes of this study are:

  • to investigate the safety and tolerability of ACI-19764 when it is administered to healthy participants and participants with cardiovascular risk factors
  • to determine how quickly and to what extent ACI-19764 is absorbed, transported, metabolized, and excreted by the body (fasted and after a meal)
  • to determine the effect of ACI-19764 on specific markers in the blood that are part of the immune system
Read more

The effects of ACI-19764 will be compared with the effects of a placebo. ACI-19764 is a brain-penetrant NLRP3 inhibitor.

The study consists of 3 parts, Part A (SAD, single ascending dose) and Part B (MAD, multiple ascending doses) in healthy participants, and Part C (one multiple-dose level) in participants with cardiovascular risk factors. Participants in Part A will receive the study compound once, and participants in Part B and Part C will receive the study compound multiple times (daily over 14 and 28 days, respectively). Parts A and B will be divided into different groups of participants to test different doses of ACI-19764.

Read the detailed description

In study Part A (SAD part), up to 6 dose levels with 8 male participants in each are planned (6 participants on ACI-19764 and 2 on placebo). Each cohort has a screening period followed by admission to the site for administration of ACI-19764 or placebo. Participants remain onsite for observation for 3 days. Participants may need to return for additional visits for 2 days after discharge to check the blood levels of the drug. A safety follow up call is planned approximately 3 weeks after discharge. In one of the higher dose cohorts, the effect of food on drug levels in the blood will also be explored with an additional admission. There may be fewer than 6 cohorts.

In study Part B (MAD part), up to 3 dose levels with 10 participants (8 on active and 2 on placebo) in each are planned. Each dose level will be investigated in a separate cohort of 10 healthy male and female participants (with 4 participants of each sex on active treatment and 1 of each sex on placebo). Each cohort has a screening period followed by admission to the site for 17 days (14-day treatment and 3 days observation). Depending on the blood levels of the drug, participants may have to return to the site for additional blood tests for the 2 days following discharge. A safety phone call is planned approximately 3 weeks after discharge.

In study Part C, a single cohort of 36 participants (18 on active and 18 on placebo) with cardiovascular risk factors is planned, including males and females. After the screening period, ACI-19764 or placebo will be administered orally once daily for 4 weeks (i.e., from Day 1 up to and including Day 28). Study participants will be confined to the study site from Day -1 up to Day 2 and from Day 28 to Day 29. In between, they will return to the study site for ambulatory visits on Day 10 and Day 17. When not on site, participants will take ACI-19764 or placebo daily at home. Participants will return to the study site on Day 31 for an ambulatory visit for blood collection. Depending on the blood levels of the drug, participants may have to return to the site on Day 35 for additional blood tests. A safety phone call is planned approximately 3 weeks after discharge.

Being tested
Placebo, ACI-19764 at dose A1, ACI-19764 at dose A2, ACI-19764 at dose A3, ACI-19764 at dose A4
Keywords
Phase 1, Healthy Participants, SAD/MAD, NLRP3 inhibitor, Pharmacokinetics, Obesity, Diabetes, Cardiovascular risks
Medical subject headings
Obesity, Diabetes Mellitus, Type 2, Diabetes Mellitus

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • PlaceboDrug

    Placebo capsules matching ACI-19764 capsules

  • ACI-19764 at dose A1Drug

    ACI-19764 capsules at dose A1

  • ACI-19764 at dose A2Drug

    ACI-19764 capsules at dose A2

  • ACI-19764 at dose A3Drug

    ACI-19764 capsules at dose A3

  • ACI-19764 at dose A4Drug

    ACI-19764 capsules at dose A4

  • ACI-19764 at dose A5Drug

    ACI-19764 capsules at dose A5

  • ACI-19764 at dose A6Drug

    ACI-19764 capsules at dose A6

  • ACI-19764 at dose B1Drug

    ACI-19764 capsules at dose B1

  • ACI-19764 at dose B2Drug

    ACI-19764 capsules at dose B2

  • ACI-19764 at dose B3Drug

    ACI-19764 capsules at dose B3

  • ACI-19764 at dose C1Drug

    ACI-19764 capsules at dose C1

Study groups in NCT07463196
Study groupRoleWhat they receive
Placebo for study Part A (SAD)Placebo comparatorParticipants receive a single oral dose of placebo
Receives: Drug: Placebo
ACI-19764 at dose A1 for study Part A (SAD)ExperimentalParticipants receive a single oral dose A1 of ACI-19764
Receives: Drug: ACI-19764 at dose A1
ACI-19764 at dose A2 for study Part A (SAD) (optional)ExperimentalParticipants receive a single oral dose A2 of ACI-19764
Receives: Drug: ACI-19764 at dose A2
ACI-19764 at dose A3 for study Part A (SAD) (optional)ExperimentalParticipants receive a single oral dose A3 of ACI-19764
Receives: Drug: ACI-19764 at dose A3
ACI-19764 at dose A4 for study Part A (SAD) (optional)ExperimentalParticipants receive a single oral dose A4 of ACI-19764
Receives: Drug: ACI-19764 at dose A4
ACI-19764 at dose A5 for study Part A (SAD) (optional)ExperimentalParticipants receive a single oral dose A5 of ACI-19764
Receives: Drug: ACI-19764 at dose A5
ACI-19764 at dose A6 for study Part A (SAD) (optional)ExperimentalParticipants receive a single oral dose A6 of ACI-19764
Receives: Drug: ACI-19764 at dose A6
Placebo for study Part B (MAD)Placebo comparatorParticipants receive multiple oral doses of placebo
Receives: Drug: Placebo
ACI-19764 at dose B1 for study Part B (MAD)ExperimentalParticipants receive multiple oral doses B1 of ACI-19764
Receives: Drug: ACI-19764 at dose B1
ACI-19764 at dose B2 for study Part B (MAD) (optional)ExperimentalParticipants receive multiple oral doses B2 of ACI-19764
Receives: Drug: ACI-19764 at dose B2
ACI-19764 at dose B3 for study Part B (MAD) (optional)ExperimentalParticipants receive multiple oral doses B3 of ACI-19764
Receives: Drug: ACI-19764 at dose B3
Placebo for study Part CPlacebo comparatorParticipants receive multiple oral doses of placebo
Receives: Drug: Placebo
ACI-19764 at dose C1 for study Part CExperimentalParticipants receive multiple oral doses C1 of ACI-19764
Receives: Drug: ACI-19764 at dose C1

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Frequency of Adverse Events (AEs) and Serious Adverse Events (SAEs) assessed by intensity (mild, moderate or severe) and causal relationship (unrelated, unlikely related, possibly related or probably related)

    Measured: From first study treatment administration up to the end of the safety follow-up (i.e. 21 to 24 days after Day 4 for study Part A, 21 to 24 days after Day 17 for study Part B, and 21 to 24 days after Day 29 for study Part C)

  2. Vital signs: Change from baseline in blood pressure

    Measured: From baseline up to the end of the treatment and observation period for Parts A and B (i.e. Day 4 for study Part A and Day 17 for study Part B), and up to the end of the safety follow-up for Part C (i.e. 21 to 24 days after Day 29)

  3. Vital signs: Change from baseline in respiratory rate

    Measured: From baseline up to the end of the treatment and observation period for Parts A and B (i.e. Day 4 for study Part A and Day 17 for study Part B), and up to the end of the safety follow-up for Part C (i.e. 21 to 24 days after Day 29)

  4. Vital signs: Change from baseline in pulse rate

    Measured: From baseline up to the end of the treatment and observation period for Parts A and B (i.e. Day 4 for study Part A and Day 17 for study Part B), and up to the end of the safety follow-up for Part C (i.e. 21 to 24 days after Day 29)

  5. Vital signs: Change from baseline in body temperature

    Measured: From baseline up to the end of the treatment and observation period for Parts A and B (i.e. Day 4 for study Part A and Day 17 for study Part B), and up to the end of the safety follow-up for Part C (i.e. 21 to 24 days after Day 29)

  6. ECG: Change from baseline in heart rate

    Measured: From baseline up to the end of the treatment and observation period for Parts A and B (i.e. Day 4 for study Part A and Day 17 for study Part B), and up to the end of the safety follow-up for Part C (i.e. 21 to 24 days after Day 29)

  7. ECG: Change from baseline in PR interval

    Measured: From baseline up to the end of the treatment and observation period for Parts A and B (i.e. Day 4 for study Part A and Day 17 for study Part B), and up to the end of the safety follow-up for Part C (i.e. 21 to 24 days after Day 29)

  8. ECG: Change from baseline in QRS interval

    Measured: From baseline up to the end of the treatment and observation period for Parts A and B (i.e. Day 4 for study Part A and Day 17 for study Part B), and up to the end of the safety follow-up for Part C (i.e. 21 to 24 days after Day 29)

  9. ECG: Change from baseline in QT interval

    Measured: From baseline up to the end of the treatment and observation period for Parts A and B (i.e. Day 4 for study Part A and Day 17 for study Part B), and up to the end of the safety follow-up for Part C (i.e. 21 to 24 days after Day 29)

  10. ECG: Change from baseline in QTcF interval

    Measured: From baseline up to the end of the treatment and observation period for Parts A and B (i.e. Day 4 for study Part A and Day 17 for study Part B), and up to the end of the safety follow-up for Part C (i.e. 21 to 24 days after Day 29)

  11. ECG: Change from baseline in QTcB interval

    Measured: From baseline up to the end of the treatment and observation period for Parts A and B (i.e. Day 4 for study Part A and Day 17 for study Part B), and up to the end of the safety follow-up for Part C (i.e. 21 to 24 days after Day 29)

  12. Number of participants reporting suicidal ideation or behavior using Columbia-Suicide Severity Rating Scale (C-SSRS)

    Applicable to study Parts B and C only

    Measured: From baseline up to the end of the treatment and observation period (i.e. Day 17 for study Part B and Day 28 for study Part C)

  13. Pharmacokinetic (PK) in plasma: Maximum observed concentration (Cmax), stratified by sex

    Measured: From baseline to up to the end of the treatment and observation period (i.e. Day 4 for study Part A, Day 17 for study Part B, and Day 28 for study Part C)

  14. Pharmacokinetic (PK) in plasma: Time to reach Cmax (tmax), stratified by sex

    Measured: From baseline to up to the end of the treatment and observation period (i.e. Day 4 for study Part A, Day 17 for study Part B, and Day 28 for study Part C)

  15. Pharmacokinetic (PK) in plasma: Area under the curve (AUC) from time zero to the last measured concentration above the limit of quantification (AUC 0-last)

    Applicable to study Part A only

    Measured: From baseline to up to the end of the treatment and observation period (i.e. Day 4)

  16. Pharmacokinetic (PK) in plasma: AUC from time zero to infinity (AUC 0-infinity)

    Applicable to study Part A only

    Measured: From baseline to up to the end of the treatment and observation period (i.e. Day 4)

  17. Pharmacokinetic (PK) in plasma: Terminal elimination half-life (t½)

    Applicable to study Part A only

    Measured: From baseline to up to the end of the treatment and observation period (i.e. Day 4)

  18. Pharmacokinetic (PK) in plasma: Dose proportionality for Cmax and AUC 0-infinity

    Applicable to study Part A only

    Measured: From baseline to up to the end of the treatment and observation period (i.e. Day 4)

  19. Pharmacokinetic (PK) in plasma: AUCtau (AUC of one dosing interval) after first and last study treatment administration, stratified by sex

    Applicable to study Parts B and C only

    Measured: From baseline to up to the end of the treatment period (i.e. Day 15 for study Part B and Day 29 for study Part C)

  20. Pharmacokinetic (PK) in plasma: Terminal elimination half-life (t½) after last study treatment administration, stratified by sex

    Applicable to study Parts B and C only

    Measured: From baseline to up to the last timepoint measured (i.e. Day 19 for study Part B and 21 to 24 days after Day 29 for study Part C)

  21. Pharmacokinetic (PK) in plasma: Average plasma concentration at steady state (Cavg,ss) during the last dosing interval, stratified by sex

    Applicable to study Parts B and C only

    Measured: From baseline to up to the end of the treatment period (i.e. Day 14 for study Part B and D28 for study Part C)

  22. Pharmacokinetic (PK) in plasma: Minimum plasma concentration at steady state (Cmin,ss) during the last dosing interval, stratified by sex

    Applicable to study Parts B and C only

    Measured: From baseline to up to the end of the treatment period (i.e. Day 14 for study Part B and D28 for study Part C)

  23. Pharmacokinetic (PK) in plasma: Trough (pre-dose) plasma concentrations (Ctrough), stratified by sex

    Applicable to study Parts B and C only

    Measured: From baseline to up to the end of the treatment period (i.e. Day 14 for study Part B and D28 for study Part C)

  24. Pharmacokinetic (PK) in plasma: Accumulation index (AI) for Cmax and AUCtau, stratified by sex

    Applicable to study Parts B and C only

    Measured: From baseline to up to the end of the treatment period (i.e. Day 14 for study Part B and D28 for study Part C)

  25. Pharmacokinetic (PK) in CSF: Drug concentration at steady state (trough level capturing Cmin), stratified by sex

    Applicable to study Part B2 and B3 only

    Measured: From baseline to Day 13

Secondary outcomes (11)
  1. Pharmacokinetic (PK) in plasma: Maximum observed concentration (Cmax) in fed state

    Applicable to study Part A Food Effect group only

    Measured: From baseline up to the end of the treatment and observation period (i.e. Day 4) of the 2nd study period for the Food Effect group

  2. Pharmacokinetic (PK) in plasma: Time to reach Cmax (tmax) in fed state

    Applicable to study Part A Food Effect group only

    Measured: From baseline up to the end of the treatment and observation period (i.e. Day 4) of the 2nd study period for the Food Effect group

  3. Pharmacokinetic (PK) in plasma: Area under the curve (AUC) from time zero to the last measured concentration above the limit of quantification (AUC 0-last), in fed state

    Applicable to study Part A Food Effect group only

    Measured: From baseline up to the end of the treatment and observation period (i.e. Day 4) of the 2nd study period for the Food Effect group

  4. Pharmacokinetic (PK) in plasma: AUC from time zero to infinity (AUC 0-infinity) in fed state

    Applicable to study Part A Food Effect group only

    Measured: From baseline up to the end of the treatment and observation period (i.e. Day 4) of the 2nd study period for the Food Effect group

  5. Pharmacokinetic (PK) in plasma: Terminal elimination half-life (t½) in fed state

    Applicable to study Part A Food Effect group only

    Measured: From baseline up to the end of the treatment and observation period (i.e. Day 4) of the 2nd study period for the Food Effect group

  6. Pharmacokinetic (PK) in plasma: Dose proportionality for Cmax and AUC 0-infinity in fed state

    Applicable to study Part A Food Effect group only

    Measured: From baseline up to the end of the treatment and observation period (i.e. Day 4) of the 2nd study period for the Food Effect group

  7. Pharmacodynamic (PD) effect of ACI-19764 (target engagement [TE]) after SAD and MAD administration of ACI-19764 in healthy participants and of one multiple-dose level in participants with cardiovascular risk factors, stratified by sex

    Change from baseline in PD parameters. Given as % of target engagement in whole blood assay (i.e. Inhibition of IL-1β release after ex vivo LPS and ATP stimulation)

    Measured: From baseline up to the last timepoint measured (i.e. Day 4 for study Part A, Day 19 for study Part B, and 21 to 24 days after Day 29 for study Part C)

  8. Peripheral Pharmacodynamic (PD) effect of ACI-19764 in participants with cardiovascular risk factors

    Proportion of participants with serum C-reactive protein (CRP) <2 mg/L after 4 weeks of treatment. Applicable to study Part C only

    Measured: From baseline up to the end of the 4-weeks treatment period (i.e. Day 28)

  9. Peripheral Pharmacodynamic (PD) effect of ACI-19764 in participants with cardiovascular risk factors

    Proportion of participants with serum C-reactive protein (CRP) <1 mg/L after 4 weeks of treatment. Applicable to study Part C only

    Measured: From baseline up to the end of the 4-weeks treatment period (i.e. Day 28)

  10. Peripheral Pharmacodynamic (PD) effect of ACI-19764 in participants with cardiovascular risk factors

    Percentage change from baseline in serum C-reactive protein (CRP) after 4 weeks of treatment. Applicable to study Part C only

    Measured: From baseline up to the end of the 4-weeks treatment period (i.e. Day 28)

  11. Peripheral Pharmacodynamic (PD) effect of ACI-19764 in participants with cardiovascular risk factors

    Absolute change from baseline in serum C-reactive protein (CRP) after 4 weeks of treatment. Applicable to study Part C only

    Measured: From baseline up to the end of the 4-weeks treatment period (i.e. Day 28)

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted11 Mar 2026
  2. Study start28 Jan 2026
  3. Primary completionDec 2026 (estimated)
  4. Study completionDec 2026 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Quadruple blind
Who is masked
Participant, Care provider, Investigator, Outcomes assessor
Enrolment
114 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07463196
Sponsor's protocol ID
ACI-19764-2501
Other IDs
2025-523885-25-00, 2025
Status last verified
Aug 2026
First submitted
18 Feb 2026
Last updated
2 Sep 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Undecided

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing ACI-19764 at dose A1, ACI-19764 at dose A2 and ACI-19764 at dose A3 in people with Healthy Participants and Obesity, run by AC Immune SA at 1 site in Netherlands.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 14 inclusion and 37 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 2 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Netherlands. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact AC Immune Clinical Lead (+41213459121, clinicaltrials@acimmune.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Frequency of Adverse Events (AEs) and Serious Adverse Events (SAEs) assessed by intensity (mild, moderate or severe) and causal relationship (unrelated, unlikely related, possibly related or probably related) (time frame: From first study treatment administration up to the end of the safety follow-up (i.e. 21 to 24 days after Day 4 for study Part A, 21 to 24 days after Day 17 for study Part B, and 21 to 24 days after Day 29 for study Part C)). The study lists 25 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 2 Sep 2026.

Free account

Keep searching with a free account

You’ve used your 3 free searches for this session. Log in or create a free AzTrials account to keep searching clinical trials and save the ones you want to follow.

Create a free accountLog in