Randomized, Controlled, Open-label, Multicenter, Safety and Efficacy Study of rhHNS Administratio… (NCT02060526) | Clinical Trial Compass
CompletedPhase 2
Randomized, Controlled, Open-label, Multicenter, Safety and Efficacy Study of rhHNS Administration Via an IDDD in Pediatric Patients With Early Stage MPS IIIA Disease
United States, Argentina, France21 participantsStarted 2014-02-26
Plain-language summary
Sanfilippo syndrome Type A, or Mucopolysaccharidosis (MPS) IIIA, is a rare lysosomal storage disease caused by deficiency of the enzyme heparan N-sulfatase (sulfamidase). In the absence of this enzyme, there is an accumulation of the glycosaminoglycan, heparan sulfate, resulting in progressive neurodegeneration. Symptoms are usually first noted in the 1st or 2nd year of life, although definitive diagnosis is often delayed, with an average age of diagnosis of 4.5 years. The disease is characterized by developmental delays initially, followed by neurological developmental arrest, then regression. These developmental deficits are typically associated with severe behavioral disturbances. Patients have a significantly reduced lifespan, with few surviving beyond the 2nd or 3rd decade.
The purpose of this study is to evaluate the safety and efficacy of recombinant human heparan-N-sulfatase (rhHNS) in pediatric patients with Early Stage Mucopolysaccharidosis Type III A Disease.
Who can participate
Age range
12 Months – 48 Months
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion criteria
. Documented MPS IIIA diagnosis
. Age ≥12 months and ≤48 months
. The patient has a DQ score ≥60%
. The patient is medically stable, in the opinion of the Investigator, and able to accommodate the protocol requirements, including travel, assessments, and IDDD surgery, without placing an undue burden on the patient/patient's family
. The patient's parent(s) or legally authorized representative(s) must have voluntarily signed and dated an Independent Ethics Committee-approved informed consent form after all relevant aspects of the study have been explained and discussed with the patient's parent(s), or legally authorized representative(s). Consent of the patient's parent(s) or legally authorized representative(s) must be obtained prior to the start of any study procedures.
Exclusion criteria
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Number of Participants With Overall Response Using Bayley Scales of Infant Development Assessment Third Edition (BSID-III)
. The presence of significant non-MPS IIIA related CNS impairment or behavioral disturbances that would confound the scientific integrity or interpretation of study assessments, as determined by the Investigator.
. The presence of at least one S298P mutation in SGSH, associated with attenuated disease OR there is documentation of the S298P mutation in a sibling affected by MPS IIIA, provided parental consent is obtained to use this information.
. The presence of relatively attenuated MPS IIIA disease in an older sibling, defined as preservation of any speech beyond the age of 10 years.
. Visual or hearing impairment sufficient, in the clinical judgment of the investigator, to preclude cooperation with neurodevelopmental testing. Use of hearing aids is permitted.
. In the opinion of the Investigator, the patient is assessed as having an unacceptably high risk for anesthesia due to airway compromise, drug hypersensitivity, or other conditions (such as neuroleptic malignant syndrome, malignant hyperthermia, or other anesthesia-related concerns).
. The patient has a history of poorly controlled seizure disorder.
. The patient is currently receiving psychotropic or other medications, which in the Investigator's opinion would be likely to substantially confound test results.
. The patient has a history of bleeding disorder or is unable to abstain from medications that, in the opinion of the investigator, place them at risk of bleeding following surgery or LP.