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Ann Clin Transl Neurol. 2016 Jan 08;3(3):226-32. doi: 10.1002/acn3.279. eCollection 2016 Mar.

Progressive multifocal leukoencephalopathy in an immunocompetent patient.

Annals of clinical and translational neurology

Nicolien M van der Kolk, Peer Arts, Ingeborg W M van Uden, Alexander Hoischen, Frank L van de Veerdonk, Mihai G Netea, Brigit A de Jong

Affiliations

  1. Department of Neurology Radboud University Medical Center Nijmegen The Netherlands.
  2. Department of Genetics Radboud University Medical Center Nijmegen The Netherlands.
  3. Department of Internal Medicine Radboud University Medical Center Nijmegen The Netherlands.
  4. Department of Neurology Radboud University Medical Center Nijmegen The Netherlands; Department of Neurology VU University Medical Center Amsterdam The Netherlands.

PMID: 27042682 PMCID: PMC4774259 DOI: 10.1002/acn3.279

Abstract

Progressive multifocal leukoencephalopathy (PML), a demyelinating disease of the brain, is typically diagnosed in immunocompromised persons. Here, we describe the diagnostic challenge of PML in an apparently immunocompetent patient. Thorough analyses, including cytokine release assays and whole exome sequencing, revealed a deficit in the antiviral interferon gamma production capacity of this patient and compound heterozygous mutations in BCL-2-associated athanogene 3. Interestingly, both factors are associated with reduced expression of John Cunningham virus T-antigen, a protein that plays a key role in viral replication in infected cells. After validation in other patients, our findings may contribute to novel insights into the etiology and possibly treatment of PML.

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