An unusual melting curve profile in LightCycler multiplex genotyping of the hemochromatosis H63D/C282Y gene mutations

Objectives: Real time polymerase chain reaction followed by melting curve analysis using hybridization probes has become an important tool in routine diagnosis of the HFE mutations, which are associated with hereditary hemochromatosis. Design and methods: We used the LightCycler technology for simultaneous detection of the H63D and C282Y mutations of the HFE gene in patients with a higher prevalence for hemochromatosis. Results: In our cohort we identified two siblings with a variant pattern of the HFE-LightCycler melting profiles preventing allelic discrimination. Conclusions: As a consequence, in these patients DNA sequencing or RFLP analysis is necessary to unequivocally assign the correct HFE genotype. (C) 2001 The Canadian Society of Clinical Chemists. All rights reserved.