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A novel COMP mutation in a pseudoachondroplasia family of Chinese origin

Li Dai1, Liang Xie, Yanping Wang

  • 1National Center for Birth Defects Monitoring, West China Second University Hospital, Sichuan University, 20 Ren Min Nan Lu Section 3, Chengdu 610041, China. daili@scu.edu.cn

BMC Medical Genetics
|May 24, 2011
PubMed

Insights

Pseudoachondroplasia (PSACH) is a genetic disorder caused by COMP gene mutations. A novel mutation in COMP was identified in a Chinese family, leading to severe short stature in patients.

Area of Science:

  • Genetics
  • Molecular Biology
  • Skeletal Dysplasias

Background:

  • Pseudoachondroplasia (PSACH) is exclusively caused by mutations in the cartilage oligomeric matrix protein (COMP) gene.
  • Limited research exists on the genetic basis and clinical presentation of PSACH in Chinese populations.

Observation:

  • A four-generation Chinese Han pedigree with PSACH was studied.
  • Clinical evaluation showed severe disproportionate short stature (<-10SD) in affected individuals.
  • Molecular genetic analysis was performed on patients and unaffected relatives.

Findings:

  • A novel heterozygous insertion (c.1352_1353insTGTCCCTGG) was identified in exon 13 of the COMP gene in PSACH patients.
  • This mutation leads to a three-amino-acid insertion (451V_452P ins VPG) in the COMP protein's sixth calmodulin-like repeat.
  • The identified mutation was absent in unaffected individuals within the pedigree.

Implications:

  • This finding identifies a new mutation responsible for severe familial PSACH.
  • Further research into COMP mutations can improve understanding and diagnosis of PSACH.
  • This expands the known spectrum of COMP mutations causing PSACH in diverse populations.
Abstract

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