Molecular diagnosis and prophylactic therapy for presymptomatic Chinese patients with Wilson disease.
BACKGROUND
The potential for therapy for Wilson disease (WD) emphasizes the importance of presymptomatic diagnosis in families with WD (WD families).


OBJECTIVE
To investigate the feasibility of presymptomatic DNA diagnosis and evaluate the efficacy of zinc sulfate therapy in WD families.


METHODS
Seventy-eight clinically unaffected siblings were studied from 51 unrelated WD families that were ascertained by affected individuals. The diagnosis in presymptomatic patients was established by a combination of direct mutational analysis and haplotype analysis with 3 short tandem repeat markers. The presymptomatic patients were treated with 50 mg of elemental zinc sulfate twice a day from the time of molecular diagnosis and followed up for 3 to 5 years.


RESULTS
Of the 78 siblings, 17 were diagnosed as presymptomatic patients. Kayser-Fleischer rings were absent in 7 and faint in 4 of the 17 presymptomatic patients. The serum ceruloplasmin values gradually increased and 24-hour urinary copper values gradually diminished during zinc therapy, which indicate effective control of copper metabolism. None of the siblings developed clinical symptoms of WD or adverse effects from zinc therapy.


CONCLUSIONS
We conclude that presymptomatic DNA diagnosis and zinc therapy are effective treatment of patients with WD.
Wu
Zhi-Ying
ZY
Department of Neurology, First Affiliated Hospital, Fujian Medical University, Fuzhou, People's Republic of China. zhiyingwu67@yahoo.com
Lin
Min-Ting
MT
Murong
Shen-Xing
SX
Wang
Ning
N
D000293:Adolescent; D000328:Adult; D044466:Asian People; D002570:Ceruloplasmin / Q000378:metabolism; D002648:Child; D003300:Copper / Q000652:urine; D005260:Female; D005500:Follow-Up Studies; D006239:Haplotypes; D006527:Hepatolenticular Degeneration / Q000175:diagnosis* / Q000188:drug therapy* / Q000235:genetics / Q000517:prevention & control; D006801:Humans; D008297:Male; D018807:Polymorphism, Single-Stranded Conformational; D019287:Zinc Sulfate / Q000627:therapeutic use*
D019287:Zinc Sulfate; D003300:Copper; D002570:Ceruloplasmin