Clinical Trial: Study to Detect Unrecognized Mucopolysaccharidosis in Children Visiting Rheumatology, Hand or Skeletal Dysplasia Clinics

Study Status: Terminated
Recruit Status: Terminated
Study Type: Observational

Official Title: Unrecognized Mucopolysaccharidosis I, II, IVA, and VI in the Pediatric Rheumatology Population

Brief Summary: 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.

Detailed Summary:

MPS, or mucopolysaccharidosis (mew-co-paw-lee-sack-a-rid-o-sis), disorders are a group of rare inherited diseases that affect about 1 in every 25,000 people in the United States. There are 7 MPS disorders: MPS I (Hurler, Hurler-Scheie, and Scheie syndromes), II (Hunter syndrome), III (Sanfilippo syndrome), IV (Morquio syndrome), VI (Maroteaux-Lamy syndrome), VII (Sly syndrome), and IX (no other name). In people who have MPS, the body cannot break down certain materials in the body's cells. These materials then build up in the cells, causing problems such as stiff joints, misshapen bones, curled hands and reduced hand function, frequent ear infections, vision and hearing problems, "thickened" facial features, and heart problems. Getting access to diagnosis and treatment can help make MPS easier to manage; but unfortunately, people with MPS may go undiagnosed for many years.

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 use dried blood spot (DBS) testing to screen for these types of MPS. It will also use a survey to evaluate the utility and convenience of dried blood spot testing for MPS.


Sponsor: National MPS Society

Current Primary Outcome: Incidence of previously unrecognized MPS I, II, IVA, and VI in children presenting to pediatric rheumatology, hand, or skeletal dysplasia clinics [ Time Frame: At study completion (approximately 18 months after the beginning of the study) ]

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).


Original Primary Outcome: Incidence of previously unrecognized MPS I, II, IVA, and VI in children presenting to pediatric rheumatology, hand, or skeletal dysplasia clinics [ Time Frame: At study completion (approximately 18 months after the beginning of the study) ]

Current Secondary Outcome: Utility of DBS testing to screen for MPS in pediatric patients [ Time Frame: At study completion (approximately 18 months after the beginning of the study) ]

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.



Original Secondary Outcome: Same as current

Information By: National MPS Society

Dates:
Date Received: August 23, 2012
Date Started: September 2011
Date Completion: March 2014
Last Updated: May 23, 2013
Last Verified: May 2013