Format

Send to

Choose Destination
Neurology. 2014 Nov 25;83(22):2062-9. doi: 10.1212/WNL.0000000000001025. Epub 2014 Oct 29.

Dystrophin quantification: Biological and translational research implications.

Author information

1
From The Dubowitz Neuromuscular Centre (K.A., V.A.-G., S.T., L.F., N.J., C.A.S., J.E.M., F.M.), UCL, Institute of Child Health, London, UK; The Center for Gene Therapy (L.E.T., A.V., Y.K., K.M.F.), The Research Institute at Nationwide Children's Hospital, Columbus, OH; Institut de Myologie (G.B., M.B., T.V.), UPMC UM76, INSERM U 794, CNRS UMR 7215, Paris, France; Institute of Genetic Medicine (R.B., M.H., S.L., V.S.), Newcastle University, UK; and Prosensa Therapeutics (A.L., G.C.), Leiden, the Netherlands. V.A.-G. is currently affiliated with the Neuromuscular Disorders Group, BioCruces Health Research Institute, Barakaldo, Spain.
2
From The Dubowitz Neuromuscular Centre (K.A., V.A.-G., S.T., L.F., N.J., C.A.S., J.E.M., F.M.), UCL, Institute of Child Health, London, UK; The Center for Gene Therapy (L.E.T., A.V., Y.K., K.M.F.), The Research Institute at Nationwide Children's Hospital, Columbus, OH; Institut de Myologie (G.B., M.B., T.V.), UPMC UM76, INSERM U 794, CNRS UMR 7215, Paris, France; Institute of Genetic Medicine (R.B., M.H., S.L., V.S.), Newcastle University, UK; and Prosensa Therapeutics (A.L., G.C.), Leiden, the Netherlands. V.A.-G. is currently affiliated with the Neuromuscular Disorders Group, BioCruces Health Research Institute, Barakaldo, Spain. f.muntoni@ucl.ac.uk.

Abstract

OBJECTIVE:

We formed a multi-institution collaboration in order to compare dystrophin quantification methods, reach a consensus on the most reliable method, and report its biological significance in the context of clinical trials.

METHODS:

Five laboratories with expertise in dystrophin quantification performed a data-driven comparative analysis of a single reference set of normal and dystrophinopathy muscle biopsies using quantitative immunohistochemistry and Western blotting. We developed standardized protocols and assessed inter- and intralaboratory variability over a wide range of dystrophin expression levels.

RESULTS:

Results from the different laboratories were highly concordant with minimal inter- and intralaboratory variability, particularly with quantitative immunohistochemistry. There was a good level of agreement between data generated by immunohistochemistry and Western blotting, although immunohistochemistry was more sensitive. Furthermore, mean dystrophin levels determined by alternative quantitative immunohistochemistry methods were highly comparable.

CONCLUSIONS:

Considering the biological function of dystrophin at the sarcolemma, our data indicate that the combined use of quantitative immunohistochemistry and Western blotting are reliable biochemical outcome measures for Duchenne muscular dystrophy clinical trials, and that standardized protocols can be comparable between competent laboratories. The methodology validated in our study will facilitate the development of experimental therapies focused on dystrophin production and their regulatory approval.

PMID:
25355828
PMCID:
PMC4248450
DOI:
10.1212/WNL.0000000000001025
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for HighWire Icon for PubMed Central
Loading ...
Support Center