Pelizaeus-Merzbacher disease (PMD) is neurodegenerative leukodystrophy caused by dysfunction of the proteolipid protein 1 (PLP1) gene on Xq22, which codes for an essential myelin protein. As an X-linked condition, PMD primarily affects males; however there have been a small number of affected females reported in the medical literature with a variety of different mutations in this gene. No affec...

Single-strand conformational polymorphism analysis of an affected male with Pelizaeus-Merzbacher disease (PMD) showed a slight change in mobility of amplified exon 5 of the proteolipid protein (PLP) gene. The exon was sequenced and a G-->A transition at codon 216 was found. This mutation eliminates a BstNI restriction site and creates a MaeI restriction site. In 1989, Gencic et al. reported a m...

Objective: Pelizaeus-Merzbacher Disease is a rare X-linked recessive leukodystrophy caused by mutation in the proteolipid protein (PLP) gene on chromosome Xq22. PMD an early-onset neurological disorder characterized nystagmus, spastic quadriplegia, ataxia, and developmental delay. Genetic analysis has identified Xq22 microduplications (60-70%), point mutations (10–25%), deletions (5-10%) within...

Pelizaeus-Merzbacher-like disease 1 (PMLD1) is a slowly progressive leukodystrophy that typically presents during the neonatal or early infantile period with nystagmus, commonly associated hypotonia, delayed acquisition of motor milestones, speech delay and dysarthria. We present 7-year-old female born to nonconsanguineous marriage developmental delay. On examination, she had 22 teeth, nystagmu...