Diagnosis of progressive multifocal leukoencephalopathy by brain biopsy with biotin labeled DNA: DNA in situ hybridization

Allen Jr. Aksamit, E. O. Major, N. R. Ghatak, G. S. Sidhu, Joseph E Parisi, J. G. Guccion

Research output: Contribution to journalArticle

41 Scopus citations


DNA:DNA in situ hybridizatin using a cloned JC virus (JCV) DNA probe labeled with biotin confirmed the presence of JCV DNA in formalin-fixed, paraffin-embedded brain biopsies from four cases of progressive multifocal leukoencephalopathy (PML). Only small pieces of tissue were available in eache case. Detection of the JC DNA:DNA hybrids was carried out by affinity cytochemistry. JCV DNA was identified predominantly in the nuclei of interfascicular oligodendrocytes in demyelinated areas of the biopsies. JC virus was isolated from one case, and the diagnosis of PML was substantiated in all cases by electron microscopic identification or immunocyrochemical labeling of JC viral antigen. In situ hybridization using a biotin labeled JCV DNA probe is a specific, sensitive and convenient method for confirming the diagnosis of PML in suspected cases evaluated by brain biopsy.

Original languageEnglish (US)
Pages (from-to)556-566
Number of pages11
JournalJournal of Neuropathology and Experimental Neurology
Issue number5
StatePublished - 1987
Externally publishedYes


ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Neuroscience(all)

Cite this