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Relative exchangeable copper: a promising tool for family screening in Wilson disease
Jean-Marc Trocello1, Souleiman El Balkhi, France Woimant
1Centre national de référence pour la maladie de Wilson, AP-HP, Hôpital Lariboisière, Paris, France.
Background:
Family screening is a main step for the diagnosis in Wilson disease. This study was undertaken to evaluate the value of relative exchangeable copper for family screening.
Methods:
Data from family screening were collected from the French National Center of Reference for Wilson disease. Subjects who were first- or second-degree relatives of the index case underwent clinical examination and biological parameters.
Results:
Of 127 subjects examined, copper abnormalities or low ceruloplasminemia were detected in 21 subjects, corresponding to 5 patients with Wilson disease, 14 heterozygous ATP7B carriers and 2 subjects with no ATP7B mutations. Relative exchangeable copper determination significantly discriminates heterozygous ATP7B carriers and subjects with no ATP7B mutations from WD patients with a cutoff of 15%.
Conclusions:
Exchangeable copper appears to be a promising tool for family screening in Wilson disease.
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