A novel LITAF/SIMPLE mutation within a family with a demyelinating form of Charcot-Marie-Tooth disease

Paola Ciotti, Marco Luigetti, Alessandro Geroldi, Simona Capponi, Ilaria Pezzini, Rossella Gulli, Costanza Pazzaglia, Luca Padua, Roberto Massa, Paola Mandich, Emilia Bellone

Research output: Contribution to journalArticlepeer-review


Charcot-Marie-Tooth disease type 1 (CMT1) is a common disorder of the peripheral nervous system. The underlying genetic cause is highly heterogeneous, and mutations in SIMPLE (small integral membrane protein of lysosome/late endosome) represent a rare cause of CMT type 1, named CMT1C. Herein, we report the clinical, electrophysiological, and neuropathological findings of an Italian CMT1 family with a novel SIMPLE missense mutation. The family exhibited electrophysiological signs of demyelination, predominantly affecting the lower limbs, with conduction blocks, and a wide variability of age of onset among the members. Molecular analysis identified the novel heterozygous missense mutation p.Pro135Arg in SIMPLE which co-segregated with the disease within the pedigree. In conclusion, our findings confirm that the genetic analysis of LITAF/SIMPLE should be considered for the diagnostic flow-chart of CMT1 patient, especially when nerve conduction studies show the presence of conduction blocks.

Original languageEnglish
Pages (from-to)183-186
Number of pages4
JournalJournal of the Neurological Sciences
Issue number1-2
Publication statusPublished - Aug 15 2014


  • CMT1 Italian patients
  • CMT1C
  • Conduction blocks
  • SIMPLE mutation
  • Sural nerve biopsy

ASJC Scopus subject areas

  • Clinical Neurology
  • Neurology
  • Medicine(all)


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