ClinicalTrials.gg
TerminatedNCT00786968Updated Feb 21, 2013

Extension Study of Intrathecal Enzyme Replacement Therapy for MPS I

A Phase 1 interventional study of laronidase in Spinal Cord Compression, Mucopolysaccharidosis I and Hurler-Scheie Syndrome, sponsored by Patricia I. Dickson, M.D.. Terminated at 2 sites in 2 countries. Open to participants aged 8 Years and older. Per ClinicalTrials.gov, last updated 2013-02-21.

Sponsored by Patricia I. Dickson, M.D. · Phase 1, Interventional, and Treatment

Why this study was terminated
Due to slow enrolment.
Phase
Phase 1
Study type
Interventional
Enrollment
3
Allocation
Not applicable
Ages
8 Years and older
Sex
All
01

Study summary

This is a one-year extension study of the use of laronidase into the spinal fluid to treat spinal cord compression in mucopolysaccharidosis I. Mucopolysaccharidosis I is a rare genetic condition due to deficiency of the enzyme alpha-l-iduronidase. Spinal cord compression occurs in this condition due to accumulation of material called glycosaminoglycans (GAG). Laronidase is the manufactured form of the enzyme alpha-l-iduronidase that is deficient in mucopolysaccharidosis I patients. The aim of this study is to determine whether laronidase is safe and effective when given into the spinal fluid as a potential non-surgical treatment for spinal cord compression due to mucopolysaccharidosis I disease. Funding Source -- FDA OOPD

Read the detailed description

Enzyme replacement therapy (ERT) has been developed for mucopolysaccharidosis I (MPS I), a lysosomal storage disorder. ERT helps many physical ailments due to the disease, but does not treat the central nervous system, due to inability to cross the blood brain barrier. Our purpose is to test delivery of ERT to the spinal fluid via intrathecal injection in patients with MPS I. In this pilot study, we will use recombinant human α-L-iduronidase administered intrathecally once per month for four months to individuals with the Hurler-Scheie and Scheie forms of MPS I and spinal cord compression. If successful, intrathecal delivery could represent a practical, straightforward method of treating central nervous system disease due to lysosomal storage.

02

Conditions studied

  • Spinal Cord Compression
  • Mucopolysaccharidosis I
  • Hurler-Scheie Syndrome
  • Scheie Syndrome
  • Lysosomal Storage Disease

Keywords

  • mucopolysaccharidosis
  • Hurler-Scheie
  • Scheie
  • laronidase
  • spinal cord compression
  • central nervous system
  • enzyme replacement therapy
  • intrathecal
03

In context

Spinal Cord Compression

52 studies on the registry are indexed under Spinal Cord Compression; 19 are open to participants now.

This study's enrollment of 3 is below the median of 43 across 35 interventional studies indexed under Spinal Cord Compression.

Browse Spinal Cord Compression studies →

Lead sponsor

Patricia I. Dickson, M.D. is the lead sponsor of 3 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
8 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

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.

Inclusion criteria

  • Hurler-Scheie, Scheie form of MPS I, or Hurler 2 years after hematopoietic stem cell transplantation

    • Spinal cord compression
    • Has received intrathecal laronidase previously with good response and no significant safety concerns
    • Age greater than 8 years
    • Able to provide legal
    • Aware of clinical treatment option of observation without treatment or surgical decompression
    • Negative urine pregnancy test at screening (nonsterile females of who are sexually active only)

Exclusion criteria

Exclusion Criteria:

  • Severe (Hurler) form of MPS I
  • Desires surgical or medical treatment of spinal cord compression
  • Spinal cord compression that warrants immediate surgical intervention
  • Pregnancy or lactation
  • Hematopoietic stem cell transplantation within 2 years of study enrollment
  • Receipt of an drug within 30 days of enrollment
  • Infusion reactions to laronidase that required medical intervention, prophylaxis, or altered enzyme administration
  • Significant anti-iduronidase antibody titer
  • Recent initiation of intravenous laronidase (within past 6 months)
  • Presence of cervical subluxation or similar external pathology as the major cause of cord compression symptoms for which surgical intervention should be immediately undertaken
Terms in these criteria, in plain language(3)

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.

Informed consent

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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.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

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.

05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
3 participants (actual)

Study arms

  • Experimental
    intrathecal laronidase

    drug laronidase, dose 1.74 mg, route intrathecal, frequency every 30-90 days, duration 1 year

    Drug: laronidase

Interventions

  • 1.74 mg intrathecally every 1-3 months for 1 year

    Also known as: Aldurazyme, recombinant human alpha-l-iduronidase

06

What researchers measure

Primary outcomes

  1. safety of intrathecal enzyme treatment by blood and spinal fluid tests; improvement or stabilization in neurologic signs and symptoms of spinal cord compression

    Time frame: 1 year

07

Study locations

2 sites
  • Los Angeles Biomedical Research Institute at Harbor-UCLA
    Torrance, California 90502, United States
  • Helsinki University Central Hospital
    Helsinki, Finland
08

Timeline

Tracking since Sep 25, 2026
Not marked actual or estimatedDates not marked actual or estimated

The record gives a start of Jan 2008, a primary completion of Oct 2011 and a completion of Oct 2011. It does not say whether these dates are actual or estimated.

How these figures are worked out, and which studies are left out of them.

Registered
Jun 17, 2008
First posted
Nov 6, 2008
Start
Jan 2008
Primary completionActual
Oct 2011
CompletionActual
Oct 2011
Last update
Feb 21, 2013
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Feb 21, 2013, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT00786968
Lead sponsor
Patricia I. Dickson, M.D.
Collaborators
The Ryan Foundation
Responsible party
Patricia I. Dickson, M.D. (Associate Professor of Pediatrics, Dickson, Patricia I., M.D.) — Sponsor-investigator
First posted
Nov 6, 2008
Start date
Jan 2008
Primary completion
Oct 2011
Completion
Oct 2011
Last update
Feb 21, 2013

Study contacts

Patricia I Dickson, MD
principal investigator · Los Angeles Biomedical Research Institute at Harbor-UCLA

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is terminated, as verified in Feb 2013. You cannot join it, but the record below documents what was studied.

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Studies of the drug tested here: Laronidase

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