A Phase 1/2 interventional study of Adalimumab Injection [Humira] and Saline Solution for Injection in Mucopolysaccharidosis I, Mucopolysaccharidosis II and Mucopolysaccharidosis VI, sponsored by Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center. Active, not recruiting at 1 site in United States. Open to participants aged 5 Years and older. Per ClinicalTrials.gov, last updated 2026-02-02.
Sponsored by Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center · Phase 1/2, Interventional, and Treatment
Randomized, double-blind, placebo-controlled, parallel-group, single-center study followed by open-label phase, to evaluate the effects of adalimumab compared to placebo on the change from baseline in joint and skeletal disease in children and adults with mucopolysaccharidosis (MPS) I, II or VI.
This study is a randomized, double-blind, placebo-controlled, parallel-group, single-center study followed by open-label phase, to evaluate the effects of adalimumab compared to placebo on the change from baseline in joint and skeletal disease in children and adults with mucopolysaccharidosis (MPS) I, II or VI. Children and adults diagnosed with MPS I, II or VI, with significant joint restrictions and pain will be randomized to adalimumab treatment or placebo treatment for the first 16 weeks. This will be followed by a 32-week open label adalimumab treatment phase.
74 studies on the registry are indexed under Mucopolysaccharidosis I; 7 are open to participants now.
This study's planned enrollment of 14 is close to the median of 14 across 47 interventional studies indexed under Mucopolysaccharidosis I.
Browse Mucopolysaccharidosis I studies →Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center is the lead sponsor of 67 studies on the registry; 1 is open to participants now.
Of its 11 completed or terminated interventional studies of FDA-regulated products, 5 (45%) have results posted.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
After a transplant from a donor, the donor’s immune cells attack the recipient’s body, often the skin, gut or liver.
Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.
Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
Vaccines made with a weakened form of the germ, such as measles–mumps–rubella (MMR), chickenpox and yellow fever. They can be risky when the immune system is weakened. Flu injections are not live; the nasal flu spray is.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
GVHD (graft-versus-host disease)
After a transplant from a donor, the donor’s immune cells attack the recipient’s body, often the skin, gut or liver.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Cancer (malignancy)
Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.
Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis B tests
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Investigational drug or device
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Live vaccines
Vaccines made with a weakened form of the germ, such as measles–mumps–rubella (MMR), chickenpox and yellow fever. They can be risky when the immune system is weakened. Flu injections are not live; the nasal flu spray is.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
20 mg subQ every other week (weight 15to \<30 kg) 40 mg subQ every other week (weight ≥30 kg). Non-responders will be escalated to weekly dosing.
Drug: Adalimumab Injection [Humira]
Saline placebo comparator
Drug: Saline Solution for Injection
Open-label extension of adalimumab dose
Drug: Adalimumab Injection [Humira]
Investigational Drug
Placebo Comparator
Pain - 16 weeks
Mean difference in bodily pain measured by the Children's Health Questionnaire - Parent Form 50 (CHQ-PF50) or the Medical Outcomes Study - Short Form 36 (SF-36) in treatment versus placebo at 16 weeks
Time frame: 16 weeks
Adalimumab trough
Percentage of subjects who achieve a goal trough concentration of adalimumab with every other week dosing
Time frame: 32 weeks
Joint range-of-motion - 16 weeks
Percentage of subjects who achieve a 5 degree or more improvement in joint range-ot-motion in treatment versus placebo at 16 weeks.
Time frame: 16 weeks
Pain - 52 weeks
Mean difference in bodily pain measured by the CHQ-PF50 or the SF-36 at 52 weeks compared to baseline.
Time frame: 52 weeks
Joint range-of-motion - 52 weeks
Percentage of subjects who achieve a 5 degree or more improvement in joint range-ot-motion at 52 weeks compared to baseline.
Time frame: 52 weeks
Incidence of Treatment-Emergent Adverse Events [Safety and Tolerability
Percentage of subjects who develop an AE and/or SAE
Time frame: 52 weeks
This study is active, not recruiting, as verified in Jan 2026. You cannot join it, but the record below documents what was studied.
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Studies of the drug tested here: Adalimumab
Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center