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Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation
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Genetic variation of aggrecanase-2 (ADAMTS5) in susceptibility to osteoarthritis

Xindie Zhou1,2, Lifeng Jiang3, Yi Zhang2

  • 1Department of Orthopedics, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, Changzhou, China.

Brazilian Journal of Medical and Biological Research = Revista Brasileira De Pesquisas Medicas E Biologicas
|January 18, 2019
PubMed

Insights

The ADAMTS5 rs2830585 gene variant is linked to a higher risk of knee osteoarthritis (OA) in the Chinese population, particularly in individuals aged 55 and older. This genetic factor may contribute to cartilage destruction by affecting the extracellular matrix.

Area of Science:

  • Genetics and Molecular Biology
  • Rheumatology
  • Biochemistry

Background:

  • Aggrecanase-2 (ADAMTS5) plays a key role in aggrecan degradation, a process implicated in cartilage destruction in osteoarthritis (OA).
  • Understanding the genetic basis of OA susceptibility is crucial for developing targeted prevention and treatment strategies.

Purpose of the Study:

  • To investigate the association between ADAMTS5 gene polymorphisms and the risk of developing knee osteoarthritis in a Chinese population.
  • To explore the functional implications of ADAMTS5 in the context of extracellular matrix regulation.

Main Methods:

  • Genotyping of ADAMTS5 polymorphisms (rs226794 and rs2830585) in 300 OA patients and 300 controls using a custom SNP Scan™ kit.
  • Co-expression analysis to identify ADAMTS5-associated genes.
  • Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analyses to elucidate gene functions.

Main Results:

  • Bioinformatics analysis revealed ADAMTS5's significant association with extracellular matrix components and organization.
  • The rs2830585 polymorphism in ADAMTS5 was significantly associated with an increased risk of knee OA.
  • No significant association was found for the rs226794 polymorphism.
  • Stratified analysis indicated that the rs2830585 association was more pronounced in individuals aged 55 years and older.

Conclusions:

  • The ADAMTS5 rs2830585 polymorphism may contribute to knee OA development, potentially through its role in extracellular matrix degradation.
  • Further validation in larger cohorts is warranted to confirm these findings and elucidate the precise mechanisms involved.

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