ACTIVE_NOT_RECRUITING

A Pivotal Study of N-Acetyl-L-Leucine on Ataxia-Telangiectasia (A-T)

Conditions

Ataxia-Telangiectasia Ataxia-Telangiectasia (A-T)Louis Bar Syndrome

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Study Overview

This clinical trial focuses on testing the efficacy of different digital interventions to promote re-engagement in cancer-related long-term follow-up care for adolescent and young adult (AYA) survivors of childhood cancer.

Description

A pivotal, randomized, double-blind, placebo-controlled, multi-center therapeutic study for patients age 4 and older with a confirmed diagnosis of Ataxia-Telangiectasia (A-T). The objective of this study is to evaluate the safety, tolerability and efficacy of N-acetyl-L-leucine (IB1001) compared to standard of care.

Official Title

Effects of N-Acetyl-L-Leucine on Ataxia-Telangiectasia (A-T: A Phase III, Randomized, Placebo-controlled, Double-blind, Crossover Study

Quick Facts

Study Start:2025-03-18

Study Completion:2028-06-01

Study Type:Not specified

Phase:Not Applicable

Enrollment:Not specified

Status:ACTIVE_NOT_RECRUITING

Study ID

NCT06673056

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Ages Eligible for Study:4 Years

Sexes Eligible for Study:ALL

Accepts Healthy Volunteers:No

Standard Ages:CHILD, ADULT, OLDER_ADULT

Inclusion Criteria	Exclusion Criteria
* 1. Written informed consent signed by the patient and/or their legal representative / parent/ impartial witness 2. Male or female aged ≥4 years with a genetically confirmed diagnosis of A-T at the time of signing informed consent. 3. Females of childbearing potential, defined as a premenopausal female capable of becoming pregnant, will be included if they are either sexually inactive (sexually abstinent for 14 days prior to the first dose and confirm to continue through 28 days after the last dose) or using one of the following highly effective contraceptives (i.e. results in \<1% failure rate when used consistently and correctly) 14 days prior to the first dose continuing through 28 days after the last dose: 1. intrauterine device (IUD); 2. surgical sterilization of the partner (vasectomy for 6 months minimum); 3. combined (estrogen or progestogen containing) hormonal contraception associated with the inhibition of ovulation (either oral, intravaginal, or transdermal); 4. progestogen only hormonal contraception associated with the inhibition of ovulation (either oral, injectable, or implantable); 5. intrauterine hormone releasing system (IUS); 6. bilateral tubal occlusion. 4. Females of non-childbearing potential who have undergone one of the following sterilization procedures at least 6 months prior to the first dose: 1. hysteroscopic sterilization; 2. bilateral salpingectomy; 3. hysterectomy; 4. bilateral oophorectomy; OR be postmenopausal with amenorrhea for at least 1 year prior to the first dose and follicle stimulating hormone (FSH) serum levels consistent with postmenopausal status. FSH analysis for postmenopausal women will be done at screening. FSH levels should be in the postmenopausal range as determined by the central laboratory. 5. Non-vasectomized male patient agrees to use a condom with spermicide during the study until 90 days beyond the last dose of study medication and the female partner agrees to comply with inclusion criteria 3 or 4. For a vasectomized male who has had his vasectomy 6 months or more prior to study start, it is required that they use a condom during sexual intercourse. A male who has been vasectomized less than 6 months prior to study start must follow the same restrictions as a non-vasectomized male. 6. If male, patient agrees not to donate sperm from the first dose until 90 days after their last dose. 7. Patients must fall within: 1. A SARA score of 7 ≤ X ≤ 34 points (out of 40) AND 2. Either: 8. Weight ≥15 kg at screening. 9. Patients are willing to disclose their existing medications/therapies for (the symptoms) of A-T, including those on the prohibited medication list. Non-prohibited medications/therapies, therapy, and physiotherapy) are permitted provided: 1. The Investigator does not believe the medication/therapy will interfere with the study protocol/results 2. Patients have been on a stable dose/duration and type of therapy for at least 42 days before Visit 1 (Baseline 1) 3. Patients are willing to maintain a stable dose/do not change their therapy throughout the duration of the study. 10. An understanding of the implications of study participation, provided in the written patient information and informed consent by patients or their legal representative/parent, and demonstrates a willingness to comply with instructions and attend required study visits (for children this criterion will also be assessed in parents or appointed guardians).	* 1. Patients who have any known hypersensitivity or history of hypersensitivity to: 1. Acetyl-Leucine (DL-, L-, D-) or derivatives. 2. Excipients the IB1001 sachet (namely isomalt, hypromellose, and strawberry flavor). 3. Excipients the placebo sachet (namely isomalt, hypromellose, strawberry flavor, citric acid, microcrystalline cellulose, lactose, denatonium benzoate). 2. Simultaneous participation in another clinical study or participation in any clinical study involving administration of an investigational medicinal product (IMP; 'study drug') for at least 42 days prior to Visit 1. At the discretion of the investigator, Medical Monitor, and Sponsor, the washout period for specific IMPs may be longer based on the pharmacological activity and pharmacokinetics of the drug. 3. Patients with a physical or psychiatric condition which, at the investigator's discretion and in consultation with the Medical Monitor and Sponsor (as applicable), may put the patient at risk, may confound the study results, or may interfere with the patient's participation in the clinical study, i.e. reliably perform study assessments. 4. Known or persistent use, misuse, or dependency of medication, drugs, or alcohol. 5. Current or planned pregnancy or women who are breastfeeding. 6. Patients with severe vision or hearing impairment (that is not corrected by glasses or hearing aids) that, at the investigator's discretion, interferes with their ability to perform study assessments. 7. Patients who have been diagnosed with arthritis or other musculoskeletal disorders affecting joints, muscles, ligaments, and/or nerves that by themselves affects patient's mobility and, at the investigator's discretion, interferes with their ability to perform study assessments. 8. Patients unwilling and/or not able to undergo a 42-day washout period from any of the following prohibited medication prior to Visit 1 (Baseline 1) and remain without prohibited medication through Visit 6. 1. N-Acetyl-DL-Leucine (e.g. Tanganil®); 2. N-Acetyl-L-Leucine (prohibited if not provided as IMP in the IB1001-303 trial); 3. Sulfasalazine; 4. Rosuvastatin.

Inclusion Criteria

Exclusion Criteria

* 1. Written informed consent signed by the patient and/or their legal representative / parent/ impartial witness 2. Male or female aged ≥4 years with a genetically confirmed diagnosis of A-T at the time of signing informed consent.
3. Females of childbearing potential, defined as a premenopausal female capable of becoming pregnant, will be included if they are either sexually inactive (sexually abstinent for 14 days prior to the first dose and confirm to continue through 28 days after the last dose) or using one of the following highly effective contraceptives (i.e. results in \<1% failure rate when used consistently and correctly) 14 days prior to the first dose continuing through 28 days after the last dose:
1. intrauterine device (IUD);
2. surgical sterilization of the partner (vasectomy for 6 months minimum);
3. combined (estrogen or progestogen containing) hormonal contraception associated with the inhibition of ovulation (either oral, intravaginal, or transdermal);
4. progestogen only hormonal contraception associated with the inhibition of ovulation (either oral, injectable, or implantable);
5. intrauterine hormone releasing system (IUS);
6. bilateral tubal occlusion. 4. Females of non-childbearing potential who have undergone one of the following sterilization procedures at least 6 months prior to the first dose:
1. hysteroscopic sterilization;
2. bilateral salpingectomy;
3. hysterectomy;
4. bilateral oophorectomy; OR be postmenopausal with amenorrhea for at least 1 year prior to the first dose and follicle stimulating hormone (FSH) serum levels consistent with postmenopausal status. FSH analysis for postmenopausal women will be done at screening. FSH levels should be in the postmenopausal range as determined by the central laboratory.
5. Non-vasectomized male patient agrees to use a condom with spermicide during the study until 90 days beyond the last dose of study medication and the female partner agrees to comply with inclusion criteria 3 or 4. For a vasectomized male who has had his vasectomy 6 months or more prior to study start, it is required that they use a condom during sexual intercourse. A male who has been vasectomized less than 6 months prior to study start must follow the same restrictions as a non-vasectomized male.
6. If male, patient agrees not to donate sperm from the first dose until 90 days after their last dose.
7. Patients must fall within:
1. A SARA score of 7 ≤ X ≤ 34 points (out of 40) AND
2. Either:
8. Weight ≥15 kg at screening. 9. Patients are willing to disclose their existing medications/therapies for (the symptoms) of A-T, including those on the prohibited medication list. Non-prohibited medications/therapies, therapy, and physiotherapy) are permitted provided:
1. The Investigator does not believe the medication/therapy will interfere with the study protocol/results
2. Patients have been on a stable dose/duration and type of therapy for at least 42 days before Visit 1 (Baseline 1)
3. Patients are willing to maintain a stable dose/do not change their therapy throughout the duration of the study.
10. An understanding of the implications of study participation, provided in the written patient information and informed consent by patients or their legal representative/parent, and demonstrates a willingness to comply with instructions and attend required study visits (for children this criterion will also be assessed in parents or appointed guardians).

* 1. Patients who have any known hypersensitivity or history of hypersensitivity to:
1. Acetyl-Leucine (DL-, L-, D-) or derivatives.
2. Excipients the IB1001 sachet (namely isomalt, hypromellose, and strawberry flavor).
3. Excipients the placebo sachet (namely isomalt, hypromellose, strawberry flavor, citric acid, microcrystalline cellulose, lactose, denatonium benzoate).
2. Simultaneous participation in another clinical study or participation in any clinical study involving administration of an investigational medicinal product (IMP; 'study drug') for at least 42 days prior to Visit 1. At the discretion of the investigator, Medical Monitor, and Sponsor, the washout period for specific IMPs may be longer based on the pharmacological activity and pharmacokinetics of the drug.
3. Patients with a physical or psychiatric condition which, at the investigator's discretion and in consultation with the Medical Monitor and Sponsor (as applicable), may put the patient at risk, may confound the study results, or may interfere with the patient's participation in the clinical study, i.e. reliably perform study assessments.
4. Known or persistent use, misuse, or dependency of medication, drugs, or alcohol.
5. Current or planned pregnancy or women who are breastfeeding. 6. Patients with severe vision or hearing impairment (that is not corrected by glasses or hearing aids) that, at the investigator's discretion, interferes with their ability to perform study assessments.
7. Patients who have been diagnosed with arthritis or other musculoskeletal disorders affecting joints, muscles, ligaments, and/or nerves that by themselves affects patient's mobility and, at the investigator's discretion, interferes with their ability to perform study assessments.
8. Patients unwilling and/or not able to undergo a 42-day washout period from any of the following prohibited medication prior to Visit 1 (Baseline 1) and remain without prohibited medication through Visit 6.
1. N-Acetyl-DL-Leucine (e.g. Tanganil®);
2. N-Acetyl-L-Leucine (prohibited if not provided as IMP in the IB1001-303 trial);
3. Sulfasalazine;
4. Rosuvastatin.

Contacts and Locations

Study Locations (Sites)

University of California Los Angeles

Los Angeles, California, 90095

United States

Massachusetts General Hospital

Boston, Massachusetts, 02114

United States

The University of Texas Health (UT Health)

Houston, Texas, 77030

United States

Collaborators and Investigators

Sponsor: IntraBio Inc

Study Record Dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Registration Dates

Study Start Date2025-03-18

Study Completion Date2028-06-01

Study Record Updates

Study Start Date2025-03-18

Study Completion Date2028-06-01

Terms related to this study

Keywords Provided by Researchers

Ataxia-Telangiectasia
Louis Bar Syndrome

Additional Relevant MeSH Terms

Ataxia-Telangiectasia
Ataxia-Telangiectasia (A-T)