Mucopolysaccharidosis II Clinical Trial
Official title:
Unrecognized Mucopolysaccharidosis I, II, IVA, and VI in the Pediatric Rheumatology Population
Verified date | May 2013 |
Source | National MPS Society |
Contact | n/a |
Is FDA regulated | No |
Health authority | United States: Institutional Review Board |
Study type | Observational |
This study is being done to learn how many children and young adults who come to pediatric rheumatology clinics may have mucopolysaccharidosis (MPS). The study tests for 4 of the types of MPS: I, II, IVA, and VI. This can help researchers decide whether to create a screening program for MPS at pediatric rheumatology clinics. This study is being done in rheumatology clinics because the first symptoms of MPS are often joint problems such as stiff joints, and rheumatologists may be the first doctors that a patient with MPS visits. The study will also evaluate the utility of dried blood spot testing for MPS.
Status | Terminated |
Enrollment | 3000 |
Est. completion date | March 2014 |
Est. primary completion date | March 2014 |
Accepts healthy volunteers | No |
Gender | Both |
Age group | 6 Months to 18 Years |
Eligibility |
Inclusion Criteria: 1. History of presenting to the pediatric rheumatology, pediatric hand, or skeletal dysplasia clinic with at least ONE "highly suspicious" symptom or at least TWO "less suspicious" symptoms that may be indicative of an MPS disorder (see below): Highly suspicious symptoms: - characteristic facial features - hearing loss - corneal clouding - cardiac manifestations - dysostosis multiplex - hepatosplenomegaly - spinal cord compression - hydrocephalus - carpal tunnel syndrome - delayed mental development or regression in mental development Less suspicious symptoms: - short stature - extensive Mongolian spots - sleep apnea - copious nasal discharge - recurrent otitis media, ear fluid that will not drain, or the presence of ear tubes - frequent upper respiratory tract infections - joint stiffness or limited range of motion - hand problems (Claw hands or reduced hand function) - hernia (inguinal or umbilical) - abnormally shaped teeth - dental cysts - tooth abscess 2. Age of at least 6 months. 3. Age under 18 years at time of initial clinic presentation. 4. Written, signed, and dated informed consent obtained from the subject (if 18 years of age) or the subject's parents (if under 18). Written, dated, and signed assent from children is also required at some centers. Exclusion Criteria: 1. Under 6 months of age. 2. Over 18 years of age at initial clinic presentation. 3. Patients who have had confirmation of an MPS disorder by biochemical analysis and/or by molecular biology. 4. Patients for whom MPS enzyme activity tests (i.e., enzyme levels tested in fibroblasts, leukocytes, serum, or blood spots) have already been performed, and for which the result was normal. (Patients who have been screened for MPS through urinary GAG and tested normal will not be excluded from the study.) 5. Written informed consent not available. 6. Subject unwilling or unable to provide the necessary blood spot for analysis. 7. Any other condition that would, in the opinion of the investigator, interfere with the participant's ability to provide informed consent, comply with study instructions, or possibly confound interpretation of study results. |
N/A
Country | Name | City | State |
---|---|---|---|
United States | University of Medicine and Dentistry of New Jersey | New Brunswick | New Jersey |
United States | Hospital for Special Surgery | New York | New York |
Lead Sponsor | Collaborator |
---|---|
National MPS Society | MediResource Inc. |
United States,
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Wang D, Eadala B, Sadilek M, Chamoles NA, Turecek F, Scott CR, Gelb MH. Tandem mass spectrometric analysis of dried blood spots for screening of mucopolysaccharidosis I in newborns. Clin Chem. 2005 May;51(5):898-900. Epub 2005 Feb 3. — View Citation
Wang D, Wood T, Sadilek M, Scott CR, Turecek F, Gelb MH. Tandem mass spectrometry for the direct assay of enzymes in dried blood spots: application to newborn screening for mucopolysaccharidosis II (Hunter disease). Clin Chem. 2007 Jan;53(1):137-40. Epub 2006 Nov 2. — View Citation
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* Note: There are 30 references in all — Click here to view all references
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Incidence of previously unrecognized MPS I, II, IVA, and VI in children presenting to pediatric rheumatology, hand, or skeletal dysplasia clinics | Each patient is screened for MPS I, II, IVA, and VI after enrolling in the study. The results for all patients will be pooled when the study is completed (expected completion approx. 18 months after the study begins). | At study completion (approximately 18 months after the beginning of the study) | No |
Secondary | Utility of DBS testing to screen for MPS in pediatric patients | For the secondary endpoint (utility of DBS testing), the following data will be collected: ease of taking and sending the DBS sample; number of errors of sample taking; adverse events (if any) associated with blood sampling by finger prick or venipuncture (for subjects over one year of age; choose whichever method is most convenient) or heel prick (for subjects under one year of age); and comfort of patients and/or their parents with the test. Study personnel who performed DBS testing will also be asked to complete a brief survey about the utility of DBS testing. |
At study completion (approximately 18 months after the beginning of the study) | Yes |
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