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Comparative Study of Clinical Endpoint in DMD: Handheld Myometry (HHM) Versus CINRG Quantitative Measurement System (CQMS)

2014-08-27 03:13:35 | BioPortfolio

Summary

The aim of the proposed research is to compare two commonly used pediatric strength testing measures: handheld myometry (HHM) and CINRG Quantitative Measurement System (CQMS), with the goal of identifying a sensitive and valid tool for measuring muscle strength in children with DMD. The data obtained from this study will be used to make recommendations for strength measurement endpoints in prospective muscular dystrophy trials and provide more reliable and accurate recommendations in the clinic for strength assessment. This study will be performed at six participating sites in the Cooperative International Neuromuscular Research Group (CINRG).

Description

We propose to compare the reliability of CQMS vs. HHM in the DMD population. The importance of this study is to be able to compare the results of clinical trials done by different networks using distinct strength endpoints. If results indicate a distinct difference in reliability of one tool over the other, a standardized tool could be established for research groups throughout the world to interpret strength in the context of clinical trials. If the results indicate minor differences then it would be possible to interpret and compare/contrast strength measurements used in different studies.

Understanding the relationship between the HHM vs CQMS will help us examine other surrogate measures capable of predicting functionality that are based on strength measurements.

Study Design

Observational Model: Case-Crossover, Time Perspective: Prospective

Conditions

Duchenne Muscular Dystrophy

Location

Children's National Medical Center
Washington
District of Columbia
United States
20010

Status

Recruiting

Source

Cooperative International Neuromuscular Research Group

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-08-27T03:13:35-0400

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Medical and Biotech [MESH] Definitions

A muscle protein localized in surface membranes which is the product of the Duchenne/Becker muscular dystrophy gene. Individuals with Duchenne muscular dystrophy usually lack dystrophin completely while those with Becker muscular dystrophy have dystrophin of an altered size. It shares features with other cytoskeletal proteins such as SPECTRIN and alpha-actinin but the precise function of dystrophin is not clear. One possible role might be to preserve the integrity and alignment of the plasma membrane to the myofibrils during muscle contraction and relaxation. MW 400 kDa.

A strain of mice arising from a spontaneous MUTATION (mdx) in inbred C57BL mice. This mutation is X chromosome-linked and produces viable homozygous animals that lack the muscle protein DYSTROPHIN, have high serum levels of muscle ENZYMES, and possess histological lesions similar to human MUSCULAR DYSTROPHY. The histological features, linkage, and map position of mdx make these mice a worthy animal model of DUCHENNE MUSCULAR DYSTROPHY.

An X-linked recessive muscle disease caused by an inability to synthesize DYSTROPHIN, which is involved with maintaining the integrity of the sarcolemma. Muscle fibers undergo a process that features degeneration and regeneration. Clinical manifestations include proximal weakness in the first few years of life, pseudohypertrophy, cardiomyopathy (see MYOCARDIAL DISEASES), and an increased incidence of impaired mentation. Becker muscular dystrophy is a closely related condition featuring a later onset of disease (usually adolescence) and a slowly progressive course. (Adams et al., Principles of Neurology, 6th ed, p1415)

MUSCULAR DYSTROPHY that occurs in VERTEBRATE animals.

A heterogenous group of inherited muscular dystrophy without the involvement of nervous system. The disease is characterized by MUSCULAR ATROPHY; MUSCLE WEAKNESS; CONTRACTURE of the elbows; ACHILLES TENDON; and posterior cervical muscles; with or without cardiac features. There are several INHERITANCE PATTERNS including X-linked (X CHROMOSOME), autosomal dominant, and autosomal recessive gene mutations.

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