Park HJ, Jang H, Lee JH, Shin HY, Cho SR, Park KD, Bang D, Lee MG, Kim SM, Lee JH, Choi YC. Clinical and Pathological Heterogeneity of Korean Patients with CAPN3 Mutations.
Yonsei Med J 2016;
57:173-9. [PMID:
26632398 PMCID:
PMC4696950 DOI:
10.3349/ymj.2016.57.1.173]
[Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Revised: 04/10/2015] [Accepted: 04/16/2015] [Indexed: 12/30/2022] Open
Abstract
PURPOSE
This study was designed to investigate the characteristics of Korean patients with calpainopathy.
MATERIALS AND METHODS
Thirteen patients from ten unrelated families were diagnosed with calpainopathy via direct or targeted sequencing of the CAPN3 gene. Clinical, mutational, and pathological spectra were then analyzed.
RESULTS
Nine different mutations, including four novel mutations (NM_000070: c.1524+1G>T, c.1789_1790inA, c.2184+1G>T, and c.2384C>T) were identified. The median age at symptom onset was 22 (interquartile range: 15-28). Common clinical findings were joint contracture in nine patients, winged scapula in four, and lordosis in one. However, we also found highly variable clinical features including early onset joint contractures, asymptomatic hyperCKemia, and heterogeneous clinical severity in three members of the same family. Four of nine muscle specimens revealed lobulated fibers, but three showed normal skeletal muscle histology.
CONCLUSION
We identified four novel CAPN3 mutations and demonstrated clinical and pathological heterogeneity in Korean patients with calpainopathy.
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