Mild Zellweger syndrome due to functionally confirmed novel PEX1 variants.

Mild Zellweger syndrome due to functionally confirmed novel PEX1 variants. J Appl Genet. 2019 Oct 18;: Authors: Lipiński P, Stawiński P, Rydzanicz M, Wypchło M, Płoski R, Stradomska TJ, Jurkiewicz E, Ferdinandusse S, Wanders RJA, Vaz FM, Tylki-Szymańska A Abstract Zellweger spectrum disorders (ZSD) constitute a group of rare autosomal recessive disorders characterized by a defect in peroxisome biogenesis due to mutations in one of 13 PEX genes. The broad clinical heterogeneity especially in late-onset presenting patients and a mild phenotype complicates and delays the diagnostic process. Here, we report a case of mild ZSD, due to novel PEX1 variants. The patient presented with an early hearing loss, bilateral cataracts, and leukodystrophy on magnetic resonance (MR) images. Normal results of serum very-long-chain fatty acids (VLCFA) and phytanic acid were found. Molecular diagnostics were performed to uncover the etiology of the clinical phenotype. Using whole exome sequencing, there have been found two variants in the PEX1 gene-c.3450T>A (p.Cys1150*) and c.1769T>C (p.Leu590Pro). VLCFA measurement in skin fibroblasts and C26:0-lysoPC in dried blood spot therefore was performed. Both results were in line with the diagnosis of ZSD. To conclude, normal results of routine serum VLCFA and branched-chain fatty acid measurement do not exclude mild forms of ZSD. The investigation of C26:0-lysoPC should be included in the diagnostic work-up in patients ...
Source: J Appl Genet - Category: Genetics & Stem Cells Authors: Tags: J Appl Genet Source Type: research

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Source: Current Medical Research and Opinion - Category: Research Tags: Curr Med Res Opin Source Type: research
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