Abstract

This workshop hosted a group of 19 clinicians and basic scientist from 5 countries (France, USA, Canada, Denmark and The Netherlands). Recent research developments and possible collaboration in advancing therapies for oculopharyngeal muscular dystrophy (OPMD), a late onset, rare and progressive neurodegeneration disorder were discussed in this meeting. The disease is caused by alanine expansion mutations in the gene encoding for poly(A)-binding protein nuclear 1 (PABPN1), resulting in accumulation of mutant PABPN1 in the cell nucleus and the formation of insoluble aggregates. Therefore, OPMD is categorized together with neurodegenerative disorders that are caused by single amino acid repeats. While the genetic cause for those disorders is often recognized, the molecular basis for symptoms is still obscure. PABPN1 is ubiquitously expressed and it is not known why symptoms develop only after midlife and initially only in subsets of skeletal muscles [1,2]. While the genetic cause for OPMD was reported in 1998 and good surgical treatments exist for major early symptoms, there are currently no medical options for the more general skeletal muscle involvement, no validated biomarkers and no clinical severity scale.

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