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Lesch-Nyhan variant syndrome: real-time rt-PCR for mRNA quantification in variable presentation in three affected
Khue Vu Nguyen1, Robert K Naviaux, Kacie K Paik
1Department of Medicine, Biochemical Genetics and Metabolism, The Mitochondrial and Metabolic Disease Center, School of Medicine, University of California San Diego, San Diego, California 92103-8467, USA. kvn006@ucsd.edu
Abstract:
Inherited mutations of hypoxanthine guanine phosphoribosyltransferase (HPRT) give rise to Lesch-Nyhan syndrome (LNS) or variants (LNV). We report molecular insights from real-time RT-PCR for HPRT mRNA quantification into the mechanism by which a single mutation located in exon 7 of the HPRT gene: c.500G>T, p.R167M, led to different clinical phenotypes from three male LNV-affected patients in the same family manifesting parallel differences in enzymatic activities. This approach can be applied for understanding genotype-phenotype correlations for other human genetic diseases.
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