Safety, Tolerability, Pharmacokinetic, and Pharmacodynamic Study of Oral ASN51 in Healthy Subjects and Subjects With Alzheimer's Disease

A Phase 1 study testing ASN51 in people with Alzheimer Disease, run by Asceneuron Pty Ltd. at 1 site in Australia.

Terminated

Stopped early. The study ended before it was planned to and will not resume.

Trial summary

ASN51-101 is a randomized, double-blind, placebo-controlled, phase 1 first in human (FIH) safety, tolerability, pharmacokinetics (PK) and pharmacodynamics (PD) study of oral ASN51 in healthy young adult and elderly subjects and elderly subjects with AD. Read more about this study

Who is it for?: Ages 18 to 85 yearsHealthy volunteers can take part
Conditions the study is for: Alzheimer Disease
What is being tested?: ASN51
Type of treatment: Pill or oral medicine
Could I receive a placebo?: Yes, some participants may receive a placebo
How many people: 25 participants
Where: 1 siteAustralia
Study dates: 2 Jun 2021to 1 Aug 2022
Phase: Phase 1
Are there results?: None posted in the registry

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 85 years
All sexes
Healthy volunteers accepted
Adult, Older adult

Who may be able to join

Healthy as determined by the Investigator, based on a medical evaluation including medical history, physical examination, neurological examination, laboratory tests and cardiac monitoring. A subject with a clinical abnormality or laboratory parameters outside the reference range for the population being studied may be included only if, in the opinion of the Investigator, the finding is (a) unlikely to introduce additional risk to the subject, (b) will not interfere with study procedures or confound study results, and (c) is not otherwise exclusionary (see Exclusion Criteria).
Men and women aged 18-55 years, inclusive, at Screening (Part 1) or 55-80 years, inclusive, at Screening (Part 2)
Subject must understand the nature of the study and provide signed and dated written informed consent in accordance with local regulations before the conduct of any study-related procedures.
Able to complete all study related testing and evaluations
Women (Part 1 only) and men of child-bearing potential with partners of child-bearing potential must agree to use highly effective contraception. Contraception should consist of: (1) a condom for the male participant or partner of a female participant, combined with (2) a highly effective method of contraception (e.g., a hormonal method associated with suppression of ovulation, an intrauterine device [IUD]) for the female participant or partner of a male participant. Abstinence from heterosexual intercourse should only be used in place of contraception when this is consistent with the usual and preferred lifestyle of the participant. For male subjects, contraception should continue for 90 days after the last dose of investigational medicinal product (IMP, one spermatic cycle). Male subjects should agree to refrain from sperm donation throughout this same period.
Women of non-childbearing potential must be post-menopausal (the last menstrual period was at least 12 months ago, and follicle-stimulating hormone [FSH] at Screening confirms post-menopausal status), or have no uterus, ovaries, or fallopian tubes (or have their fallopian tubes tied). All women must have a negative pregnancy test result before administration of test article. Women who are surgically sterile must provide documentation of the procedure by an operative report or by ultrasound.

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Body weight > 50.0 kg for men and > 50 kg for women and Body Mass Index (BMI) within the range 18.5-30.0 kg/m2, inclusive.
Subject must be, in the opinion of the Investigator, able to participate in all scheduled evaluations, likely to complete all required tests, and likely to be compliant.
Subjects is fluent in the local language.
Subject agrees not to post any personal medical data related to the study or information related to the study on any website or social media site (e.g., Facebook, Twitter, etc.) until the trial has been completed, this does not include information about participating in a clinical study in general.
[Part 2 only] Subject is able to undergo Lumbar Puncture (LP)
Between 55-85 years of age, inclusive.
Mild cognitive impairment due to AD or Mild-to-moderate AD dementia, Mini-Mental State Examination (MMSE) 14-27 and Clinical Dementia Rating (CDR) 0.5, 1 or 2 at the Screening Visit.
Clinical diagnosis of mild cognitive impairment or dementia, due probably to AD, by Revised National Institute on Aging-Alzheimer's Association criteria.
Reliable and capable support person/caregiver.
Able to undergo Lumbar Puncture (LP) and complete all study related testing and evaluations.
Women of non-childbearing potential must be post-menopausal [the last menstrual period was at least 12 months ago, and FSH at Screening confirms post-menopausal status], or have no uterus, ovaries, or fallopian tubes; or have their fallopian tubes tied. All women must have a negative pregnancy test result before administration of test article. Women who are surgically sterile must provide documentation of the procedure by an operative report or by ultrasound.
Women and men of child-bearing potential with partners of child-bearing potential must agree to use highly effective contraception. Contraception should consist of: (1) a condom for the male participant or partner of a female participant, combined with (2) a highly effective method of contraception (e.g., a hormonal method associated with suppression of ovulation, an IUD) for the female participant or partner of a male participant. Abstinence from heterosexual intercourse should only be used in place of contraception when this is consistent with the usual and preferred lifestyle of the participant. For male subjects, contraception should continue for 90 days after the last dose of IMP (one spermatic cycle). Male subjects should agree to refrain from sperm donation throughout this same period.
Treatment-free or receiving stable acetylcholinesterase inhibitor (AChEI) treatment, defined as:
Subjects who are taking an approved AChEI for at least 2 weeks prior to the first Screening biomarker for efficacy assessment at a dose that is not anticipated to change through the study follow-up period, OR
Subjects who received an AChEI in the past and discontinued, e.g., due to tolerability issues, at least 5 half-lives or 30 days before the first Screening biomarker or efficacy assessment, whichever is longer.

Who cannot join

A positive urine drug screen/alcohol breath test at Screening or Day -1.
Any history of intellectual disability or psychiatric disorders, including substance use disorders, according to the Diagnostic and Statistical Manual of Mental Disorders, 5th Edition (DSM-5) criteria, except a history of mild depression/anxiety that has been resolved for at least the past 12 months.
A positive Hepatitis B surface antigen, Hepatitis C antibody, or Human Immunodeficiency Virus (HIV) antibody test at Screening.
Alanine aminotransferase or aspartate aminotransferase levels greater than 1.5 times the upper limit of normal (ULN) at Screening or between Screening and first dose administration.
Frequent use of any tobacco-containing (e.g., cigar, cigarette, or snuff) or nicotine-containing product (e.g., nicotine chewing gum, nicotine plasters, or other product used for smoking cessation) within 3 months prior to 1 week before study drug administration. Frequent use is defined as more than 10 cigarettes or equivalent per week. Use of any tobacco or nicotine-containing product is prohibited from 1 week prior to study drug administration throughout the study (final visit).
History of regular alcohol consumption within the last 12 months, defined as an average weekly intake of >21 alcoholic drinks/week for men or >14 alcoholic drinks/week for women.

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Regularly consumed (e.g., more days than not) excessive quantities of xanthine-containing beverages (e.g., more than five cups of coffee or the equivalent per day) within 30 days prior to Day -1.
Received or used an investigational product (including placebo) or device within the following time period prior to Day -1 in the current study: 90 days, 5 half-lives, or twice the duration of the biological effect of the investigational product (whichever is longer).
Use of prescription or non-prescription drugs, vitamins, herbal, and dietary supplements (including St John's Wort) within 7 days (or 28 days if the drug is a potential hepatic enzyme inducer) or 5 half-lives (whichever is longer) prior to Day -1.
History of clinically significant sensitivity to any of the study medications, or components thereof or a history of drug or other allergy that, in the opinion of the Investigator or Medical Monitor, contraindicates their participation.
Loss of more than 400 mL of blood within 3 months prior to Day -1, i.e., blood donor
A positive serum pregnancy test or lactation.
Hearing test result considered unacceptable for auditory ERP P300 assessment.
A history or presence of any disease, condition, or surgery likely to affect drug absorption, distribution, metabolism, or excretion. Subjects with a history of cholecystectomy should be excluded.
A history or presence of a clinically significant hepatic, renal, gastrointestinal, cardiovascular, endocrine, pulmonary, ophthalmologic, immunologic, hematologic, dermatologic, or neurologic abnormality.
A clinically significant abnormality on physical examination, neurological examination, electrocardiogram (ECG), or laboratory evaluations at Screening or between Screening and first dose administration.
A corrected QT interval measurement corrected according to the Fridericia rule (QTcF) > 450 msec during controlled rest at screening or between screening and first dose administration, or family history of long QT syndrome.
Any clinically significant abnormalities in rhythm, conduction, or morphology of the resting ECG and any abnormalities in the 12-lead ECG that, in the judgement of the Investigator or Medical Monitor, may interfere with the interpretation of QTc interval changes, including abnormal ST-T-wave morphology or left ventricular hypertrophy.
PR (PQ) interval shortening < 120 msec (PR < 120 msec but > 110 msec is acceptable if there is no evidence of ventricular pre-excitation).
PR (PQ) interval prolongation (> 220 msec), intermittent second- (Wenckebach block while asleep or in deep rest is not exclusionary) or third-degree AV block.
Persistent or intermittent complete bundle branch block (BBB), incomplete bundle branch block (IBBB), or intraventricular conduction delay (IVCD) with QRS > 120 msec.
A clinically significant vital signs abnormality at Screening or Day -1 This includes, but is not limited to, the following, in the sitting position (3 measurements, each 5 minutes apart): (a) systolic blood pressure < 90 or >140 mmHg, (b) diastolic blood pressure < 50 or > 95 mmHg, or (c) heart rate < 45 or > 100 beats per minute.
Significant (> 10%) weight loss or gain within 30 days prior to Day -1
A history of seizure.
A history of head trauma, with loss of consciousness, except for minor head trauma that occurred at least 20 years prior to first dose.
A history of symptomatic orthostatic hypotension (i.e., postural syncope) or symptomatic orthostatic hypotension at Screening.
A history of neuroleptic malignant syndrome.
A history of chronic urinary tract infections.
The subject is, in the opinion of the Investigator or Medical Monitor, unlikely to comply with the protocol or is unsuitable for any reason, e.g., known issues with ability to swallow size 00 capsules.
Currently employed by Asceneuron SA or by a clinical trial site participating in this study, or a first-degree relative of an Asceneuron SA employee or of an employee at a participating clinical trial site.
Unsatisfactory venous access.
Identification of suicide risk in the Columbia-Suicide Severity Rating Scale (C-SSRS).
Part 2 only: Abnormal exercise ECG in relation to age.
Part 3 Only:
Receipt of any investigational drug or device within 8 weeks or 4 half-lives, whichever is longer, prior to randomization.
History of cardiovascular disease or at risk of stroke or heart attack, peripheral vascular intervention, atrial fibrillation, clinically relevant cardiac arrhythmias, or uncontrolled hypertension.
History within 2 years of Screening, or current diagnosis of the any of the following psychiatric disorders: Schizophrenia, schizoaffective disorder, bipolar disorder I, or alcohol abuse or dependence per DSM-5 criteria.
History of unexplained loss of consciousness, and seizures (excluding infant febrile seizures)
Ongoing infectious, metabolic, or systemic diseases affecting the central nervous system (CNS) (e.g. syphilis, untreated hypothyroidism, current vitamin B12 or folate deficiency, potentially clinically significant serum electrolyte disturbances, unstable diabetes mellitus (HbA1c > 10.5%); or other similar conditions.
History within 2 years of Screening, or current diagnosis of a chronic inflammatory disease (i.e., rheumatoid arthritis, systemic lupus, erythematosus, Crohn's disease, etc.).
A positive Hepatitis B surface antigen, Hepatitis C antibody, or Human Immunodeficiency Virus (HIV) antibody test at Screening.
The subject has received active amyloid or tau immunization at any time, or passive immunization within 12 months of Screening.
Intake of any of the prohibited medications listed below within the past 30 days or 5 half-lives, whichever is longer. Subjects need to stay off the medication during the trial.
For memantine, a 1-month drug-free period is required between the last dose received and Screening
Anticonvulsants
Neuroleptics (quetiapine and clozapine are allowed)
Centrally active anti-hypertensive drugs (e.g., clonidine, alpha-methyldopa, guanidine, or guanfacine)
Immunosuppressants or systemic corticosteroids >10 mg/day prednisone or equivalent
Anticoagulants
9. History or presence of brain MRI scans indicative of a neurologic disease other than AD or any other significant abnormality.
10. Subject has an atypical variant presentation of AD, if known from medical history, particularly non-amnestic AD.
11. History of treatment for cancer within the past 2 years. Subjects who have undergone curative excision of basal cell carcinoma or squamous cell carcinoma of the skin within the past 2 years are permitted.
12. Blood pressure and ECG parameters at Screening:
Seated systolic blood pressure < 90 mmHg or > 150 mmHg; or diastolic blood pressure < 50 mmHg or > 95 mmHg
ECG abnormalities on the screening ECG including: clinically significant conduction abnormalities, ischemic changes (e.g., prior Q-wave myocardial infarction and/or marked ischemic ST- and T-wave), arrhythmias (e.g., persistent or paroxysmal ventricular or supraventricular arrhythmias, including atrial fibrillation), or other ECG abnormalities that would pose unnecessary risk in the opinion of the Investigator
QTc interval > 450 in males or > 470 in females utilizing Fredericia's correction (QTcF)
13. Abnormal stress ECG in relation to age at Screening.
14. Renal insufficiency (serum creatinine >177 μmol/L).
15. Hepatic impairment with alanine aminotransferase or aspartate aminotransferase > 1.5 times the upper limit of normal, or Child-Pugh class B or C.
16. Hearing test result considered unacceptable for auditory ERP P300 assessment.
17. Positive urine or serum pregnancy test, lactating, or plans to become pregnant during the trial.
18. Significant suicide risk as assessed by C-SSRS.
19. Any condition that in the judgement of the Investigator would interfere with the ability to complete the trial, pose significant risk to subject safety, or potentially confound interpretation of trial results, e.g., known issues with ability to swallow size 5 capsules.

Trial locations and contacts

1 site in 1 country.

Australia1 site

Nucleus Network
Melbourne, Victoria, 3004

Other trials in Australia

About this study

Official title: A Randomized, Double-Blind, Placebo-Controlled, Phase 1 Safety, Tolerability, Pharmacokinetics and Pharmacodynamics Study of Oral ASN51 in Healthy Young Adult and Elderly Subjects and Elderly Subjects With Alzheimer's Disease

Read the detailed description

Part 1:

Five (5) single-ascending oral doses will be administered to 40 healthy adult male or female subjects (aged 18-55 years, inclusive). Escalation to the next higher dose level may occur only after evaluation of the safety and PK results of the previous dose level (at least 6 evaluable subjects). Within each cohort, 6 subjects will receive one dose of ASN51, and 2 subjects will receive one dose of matching placebo. Based on this interim safety evaluation, dose levels may be revised.

Part 2:

Multiple ascending oral doses will be administered to 24 healthy elderly subjects (aged 55 - 80 years, inclusive) in 3 sequential dosing groups (8 subjects in each dosing group). Six (6) subjects will receive ASN51 and two (2) subjects will receive matching placebo in each dosing group (cohort) for 10 days. Escalation to the next higher dose level may occur only after evaluation of the safety and PK results of the previous dose level (at least 6 evaluable subjects). Based on this interim safety evaluation, dose levels may be revised.

Treatment of the subjects of each cohort will be administered as follows:

Day 1 - 9: Twice daily (BID) dosing (or once daily (QD) dosing); to be defined after Part 1 (SAD) of ASN51 or placebo.

Day 10: Only one dose will be administered in the morning of Day 10 Selection of the dosing regimen and dose levels to be administered in Part 2 will be made by the safety review committee (SRC), depending on the results of Part 1.

Part 3:

Multiple oral doses will be administered to 12 AD subjects (aged 55-85, inclusive) in a single dosing group for 10 days. Eight (8) AD subjects will receive ASN51 and four (4) AD subjects will receive placebo in that dosing group (cohort). Selection of the dose level to be administered in Part 3 will be made by the SRC and will depend on the results of study Part 1 (SAD) and Part 2 (MAD), and will be below the maximum tolerated dose administered to healthy subjects in Part 2.

Treatment of the AD subjects will be administered as follows:

Day 1 - 9: Twice daily (BID) dosing (or once daily (QD) dosing); to be defined after Part 2 (MAD) of ASN51 or placebo.

Day 10: Only one dose will be administered in the morning of Day 10. Selection of the dosing regimen and dose level to be administered in Part 3 will be made by the safety review committee (SRC), depending on the results of both Part 1 and Part 2.

Conditions: Alzheimer Disease
Being tested: ASN51, Placebo
Medical subject headings: Alzheimer Disease

What participants receive

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

ASN51Drug
ASN51 formulation for oral capsule
PlaceboDrug
Placebo formulation for oral capsule

Study groups in NCT04759365
Study group	Role	What they receive
ASN51	Experimental	ASN51 will be administered as an oral capsule Receives: Drug: ASN51
Placebo	Placebo comparator	Placebo will be administered as an oral capsule Receives: Drug: Placebo

What is being measured

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

Incidence of Treatment-Emergent Adverse Events (TEAEs) and Serious Adverse Events (SAEs)
Measured: Up to 38 days

Secondary outcomes (20)

PK parameter: The area under the concentration-time curve from time zero to time t of the last measured concentration above the limit of quantification (AUC0-t) in plasma
Measured: Up to 10 days
PK parameter: The area under the concentration-time curve from zero to infinity (AUC0-inf) in plasma
Measured: Up to 10 days
PK parameter: The maximum concentration (Cmax) at steady state in plasma
Measured: Up to 10 days
PK parameter: The time to reach maximum concentration (tmax) in plasma
Measured: Up to 10 days
PK parameter: The terminal elimination rate constant (λZ) with the respective half-life (t½) in plasma
Measured: Up to 10 days
PK parameter: The percentage of the extrapolated AUC in plasma
Measured: Up to 10 days
PK parameter: Area under the concentration-time curve from time zero to the end of the dosing interval (AUCtau) in plasma (Part 2 Day 1 only)
Measured: Up to 1 day
PK parameter: The minimal observed trough concentration (Cmin) at steady state in plasma
Measured: Up to 10 days
PK parameter: The average concentration (Cavg) at steady state in plasma
Measured: Up to 10 days
PK parameter: Accumulation Ratio: AUCtau at Day 10/ AUCtau at Day 1 in plasma
Measured: Up to 10 days
PK parameter: The mean cumulative amounts excreted (both in % of the administered dose and in mg ASN51) will be calculated both for Fe(0-72h) and Fe(0-tau) and Ae(0-72h) and Ae(0-tau), respectively
Measured: Up to 10 days
PK parameter: The area under the plasma concentration-time curve from time zero to time t of the last measured concentration above the limit of quantification (AUC0-t) in cerebrospinal fluid (CSF)
Measured: Up to 10 days
PK parameter: The area under the plasma concentration-time curve from zero to infinity (AUC0-∞) in CSF
Measured: Up to 10 days
PK Parameter: The maximum plasma concentration (Cmax) in CSF
Measured: Up to 10 days
PK parameter: The time to reach maximum plasma concentration (tmax) in CSF
Measured: Up to 10 days
PK parameter: The terminal elimination rate constant (λZ) with the respective half-life (t½) in CSF
Measured: Up to 10 days
PK parameter: The percentage of the extrapolated AUC in CSF
Measured: Up to 10 days
PK parameter: Area under the concentration-time curve from time zero to the end of the dosing interval (AUCtau) in CSF
Measured: Up to 10 days
PD parameter: Change from baseline in total and phosphorylated CSF tau
Measured: Up to 10 days
PD parameter: Change from baseline in quantitative electroencephalography power and the P300 event related potential (ERP)
Measured: Up to 10 days

Timeline

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

2 Jun 20211 Aug 2022

First posted18 Feb 2021
Study start2 Jun 2021
Primary completion1 Aug 2022
Study completion1 Aug 2022

Why it stopped: Delays with sites, identifying/enrolling patients, impact of COVID, staffing, and duration

Resources

Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
Other trials for Alzheimer DiseaseStudies of the same condition, open and under way.
What the trial phases meanHow a treatment moves from first tests in people to approval.

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: Sequential
Masking: Quadruple blind
Who is masked: Participant, Care provider, Investigator, Outcomes assessor
Enrolment: 25 participants (actual)

IDs, dates and publications

ClinicalTrials.gov ID: NCT04759365
Sponsor's protocol ID: ASN51-101
Status last verified: Jan 2023
First submitted: 15 Feb 2021
Last updated: 17 Jan 2023
Results posted: No
Data monitoring committee: No
FDA-regulated drug: No
FDA-regulated device: No
Individual data sharing: No

Want to know more?

The sponsor has not listed a contact. The official record may have more details.

Talk to your doctor first and take this page with you. Only the study team can confirm whether you can join.

Questions to ask the study team

What is the study trying to find out?
What would I need to do, and how often would I visit?
Could I receive a placebo instead of the treatment?
What are the possible risks and benefits for me?
Will it cost me anything? Are travel or time paid for?
Can I keep seeing my own doctor during the study?
What happens when the study ends?

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Study at a glance

From the registry record, last updated by the sponsor on 17 Jan 2023. Recruitment status is as the sponsor reported it: confirm with the study team.

Official title: A Randomized, Double-Blind, Placebo-Controlled, Phase 1 Safety, Tolerability, Pharmacokinetics and Pharmacodynamics Study of Oral ASN51 in Healthy Young Adult and Elderly Subjects and Elderly Subjects With Alzheimer's Disease
ClinicalTrials.gov ID: NCT04759365
Acronym / sponsor ID: ASN51-101
Conditions: Alzheimer Disease
Phase: Phase 1
Study type: Interventional
Recruitment status: TerminatedReason stopped: Delays with sites, identifying/enrolling patients, impact of COVID, staffing, and duration
Enrolment: 25 participants (actual)
Lead sponsor: Asceneuron Pty Ltd.Industry (pharma, biotech, devices)
Collaborators: Asceneuron S.A., Neuroscience Trials Australia
Study start: 2 Jun 2021 (actual)
Primary completion: 1 Aug 2022 (actual)
Study completion: 1 Aug 2022 (actual)
First posted: 18 Feb 2021 (actual)
Results: Not posted in the source record

Clinical summary

The research question as the sponsor registered it. This describes what the study plans to test, not what it found.

Detailed description

Part 1:

Part 2:

Treatment of the subjects of each cohort will be administered as follows:

Day 1 - 9: Twice daily (BID) dosing (or once daily (QD) dosing); to be defined after Part 1 (SAD) of ASN51 or placebo.

Part 3:

Treatment of the AD subjects will be administered as follows:

Day 1 - 9: Twice daily (BID) dosing (or once daily (QD) dosing); to be defined after Part 2 (MAD) of ASN51 or placebo.

Study design

Primary purpose: Treatment
Allocation: Randomised
Intervention model: Sequential
Masking: Quadruple blind (participant, care provider, investigator, outcomes assessor)
Number of arms: 2

Arm	Type	Receives
ASN51	Experimental	Drug: ASN51ASN51 will be administered as an oral capsule
Placebo	Placebo comparator	Drug: PlaceboPlacebo will be administered as an oral capsule

Who may qualify

Ages: 18 to 85 years
Sex: All
Healthy volunteers: Accepted
Age groups: Adult, Older adult

Key inclusion criteria (21 listed)

Healthy as determined by the Investigator, based on a medical evaluation including medical history, physical examination, neurological examination, laboratory tests and cardiac monitoring. A subject with a clinical abnormality or laboratory parameters outside the reference range for the population being studied may be included only if, in the opinion of the Investigator, the finding is (a) unlikely to introduce additional risk to the subject, (b) will not interfere with study procedures or confound study results, and (c) is not otherwise exclusionary (see Exclusion Criteria).
Men and women aged 18-55 years, inclusive, at Screening (Part 1) or 55-80 years, inclusive, at Screening (Part 2)
Subject must understand the nature of the study and provide signed and dated written informed consent in accordance with local regulations before the conduct of any study-related procedures.
Able to complete all study related testing and evaluations
Women (Part 1 only) and men of child-bearing potential with partners of child-bearing potential must agree to use highly effective contraception. Contraception should consist of: (1) a condom for the male participant or partner of a female participant, combined with (2) a highly effective method of contraception (e.g., a hormonal method associated with suppression of ovulation, an intrauterine device [IUD]) for the female participant or partner of a male participant. Abstinence from heterosexual intercourse should only be used in place of contraception when this is consistent with the usual and preferred lifestyle of the participant. For male subjects, contraception should continue for 90 days after the last dose of investigational medicinal product (IMP, one spermatic cycle). Male subjects should agree to refrain from sperm donation throughout this same period.

Key exclusion criteria (63 listed)

A positive urine drug screen/alcohol breath test at Screening or Day -1.
Any history of intellectual disability or psychiatric disorders, including substance use disorders, according to the Diagnostic and Statistical Manual of Mental Disorders, 5th Edition (DSM-5) criteria, except a history of mild depression/anxiety that has been resolved for at least the past 12 months.
A positive Hepatitis B surface antigen, Hepatitis C antibody, or Human Immunodeficiency Virus (HIV) antibody test at Screening.
Alanine aminotransferase or aspartate aminotransferase levels greater than 1.5 times the upper limit of normal (ULN) at Screening or between Screening and first dose administration.
Frequent use of any tobacco-containing (e.g., cigar, cigarette, or snuff) or nicotine-containing product (e.g., nicotine chewing gum, nicotine plasters, or other product used for smoking cessation) within 3 months prior to 1 week before study drug administration. Frequent use is defined as more than 10 cigarettes or equivalent per week. Use of any tobacco or nicotine-containing product is prohibited from 1 week prior to study drug administration throughout the study (final visit).

Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.

Interventions

Intervention	Type	Arms
ASN51ASN51 formulation for oral capsule	Drug	ASN51
PlaceboPlacebo formulation for oral capsule	Drug	Placebo

Primary outcome

Incidence of Treatment-Emergent Adverse Events (TEAEs) and Serious Adverse Events (SAEs)
Time frame: Up to 38 days

20 secondary outcomes

PK parameter: The area under the concentration-time curve from time zero to time t of the last measured concentration above the limit of quantification (AUC0-t) in plasma
Time frame: Up to 10 days
PK parameter: The area under the concentration-time curve from zero to infinity (AUC0-inf) in plasma
Time frame: Up to 10 days
PK parameter: The maximum concentration (Cmax) at steady state in plasma
Time frame: Up to 10 days
PK parameter: The time to reach maximum concentration (tmax) in plasma
Time frame: Up to 10 days
PK parameter: The terminal elimination rate constant (λZ) with the respective half-life (t½) in plasma
Time frame: Up to 10 days
PK parameter: The percentage of the extrapolated AUC in plasma
Time frame: Up to 10 days
PK parameter: Area under the concentration-time curve from time zero to the end of the dosing interval (AUCtau) in plasma (Part 2 Day 1 only)
Time frame: Up to 1 day
PK parameter: The minimal observed trough concentration (Cmin) at steady state in plasma
Time frame: Up to 10 days
PK parameter: The average concentration (Cavg) at steady state in plasma
Time frame: Up to 10 days
PK parameter: Accumulation Ratio: AUCtau at Day 10/ AUCtau at Day 1 in plasma
Time frame: Up to 10 days
PK parameter: The mean cumulative amounts excreted (both in % of the administered dose and in mg ASN51) will be calculated both for Fe(0-72h) and Fe(0-tau) and Ae(0-72h) and Ae(0-tau), respectively
Time frame: Up to 10 days
PK parameter: The area under the plasma concentration-time curve from time zero to time t of the last measured concentration above the limit of quantification (AUC0-t) in cerebrospinal fluid (CSF)
Time frame: Up to 10 days
PK parameter: The area under the plasma concentration-time curve from zero to infinity (AUC0-∞) in CSF
Time frame: Up to 10 days
PK Parameter: The maximum plasma concentration (Cmax) in CSF
Time frame: Up to 10 days
PK parameter: The time to reach maximum plasma concentration (tmax) in CSF
Time frame: Up to 10 days
PK parameter: The terminal elimination rate constant (λZ) with the respective half-life (t½) in CSF
Time frame: Up to 10 days
PK parameter: The percentage of the extrapolated AUC in CSF
Time frame: Up to 10 days
PK parameter: Area under the concentration-time curve from time zero to the end of the dosing interval (AUCtau) in CSF
Time frame: Up to 10 days
PD parameter: Change from baseline in total and phosphorylated CSF tau
Time frame: Up to 10 days
PD parameter: Change from baseline in quantitative electroencephalography power and the P300 event related potential (ERP)
Time frame: Up to 10 days

Results and safety

The study was stopped early (reason given: Delays with sites, identifying/enrolling patients, impact of COVID, staffing, and duration). Results are not available in the source record.

Research links

Official record on ClinicalTrials.govLast updated by the sponsor 17 Jan 2023.
Individual participant dataSharing planned: No

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Alzheimer's Disease

Referral and contact

AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.

The record lists no contact. Use the official record to reach the sponsor.

1 site in 1 country: see every site and its status.

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing ASN51 in people with Alzheimer Disease, run by Asceneuron Pty Ltd. at 1 site in Australia.

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 21 inclusion and 63 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: stopped early, as of the sponsor's last update on 17 Jan 2023. 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 Australia. 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?

The study was stopped early (reason given: Delays with sites, identifying/enrolling patients, impact of COVID, staffing, and duration). Results are not available in the source record.

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

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Incidence of Treatment-Emergent Adverse Events (TEAEs) and Serious Adverse Events (SAEs) (time frame: Up to 38 days). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT04759365.

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 17 Jan 2023.