Authors
Chizuru Akimoto, Alexander E Volk, Marka van Blitterswijk, Marleen Van den Broeck, Claire S Leblond, Serge Lumbroso, William Camu, Birgit Neitzel, Osamu Onodera, Wouter van Rheenen, Susana Pinto, Markus Weber, Bradley Smith, Melanie Proven, Kevin Talbot, Pamela Keagle, Alessandra Chesi, Antonia Ratti, Julie van der Zee, Helena Alstermark, Anna Birve, Daniela Calini, Angelica Nordin, Daniela C Tradowsky, Walter Just, Hussein Daoud, Sabrina Angerbauer, Mariely DeJesus-Hernandez, Takuya Konno, Anjali Lloyd-Jani, Mamede de Carvalho, Kevin Mouzat, John E Landers, Jan H Veldink, Vincenzo Silani, Aaron D Gitler, Christopher E Shaw, Guy A Rouleau, Leonard H van den Berg, Christine Van Broeckhoven, Rosa Rademakers, Peter M Andersen, Christian Kubisch
Publication date
2014/6/1
Journal
Journal of medical genetics
Volume
51
Issue
6
Pages
419-424
Publisher
BMJ Publishing Group Ltd
Description
Background
The GGGGCC-repeat expansion in C9orf72 is the most frequent mutation found in patients with amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). Most of the studies on C9orf72 have relied on repeat-primed PCR (RP-PCR) methods for detection of the expansions. To investigate the inherent limitations of this technique, we compared methods and results of 14 laboratories.
Methods
The 14 laboratories genotyped DNA from 78 individuals (diagnosed with ALS or FTD) in a blinded fashion. Eleven laboratories used a combination of amplicon-length analysis and RP-PCR, whereas three laboratories used RP-PCR alone; Southern blotting techniques were used as a reference.
Results
Using PCR-based techniques, 5 of the 14 laboratories got results in full accordance with the Southern blotting results. Only 50 of the 78 DNA samples got the same genotype result in all 14 laboratories …
Scholar articles
C Akimoto, AE Volk, M van Blitterswijk… - Journal of medical genetics, 2014