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Analysis of the distribution and frequency of trisomy 7 in vivo in synovia from patients with osteoarthritis and pigmented villonodular synovitis

Publiceringsår: 2001
Språk: Engelska
Sidor: 19-24
Publikation/Tidskrift/Serie: Cancer genetics and cytogenetics
Volym: 131
Nummer: 1
Dokumenttyp: Artikel
Förlag: Elsevier Science Inc


Osteoarthritis (OA) and pigmented villonodular synovitis (PVNS) are disorders associated with trisomy 7. The aim of the present study was to determine the frequency and distribution of the cells with +7 in vivo by analyzing sections of paraffin-embedded synovia from patients affected by OA, PVNS, other forms of synovitis [hemorragic synovitis (HS) and chronic synovitis (CS)], and from individuals without joint disease. Fluorescence in situ hybridization (FISH), using a centromeric probe for chromosome 7, showed that the mean frequency of trisomic nuclei in 5-microm sections was highest in PVNS (9.0%), followed by CS (5.9%), OA (5.6%), and HS (4.6%), whereas trisomic nuclei were rare (0.7%) in normal tissue. When 8-microm sections were studied, the frequencies of trisomic cells in OA and control synovia increased to 6.7% and 1.5%, respectively. Trisomic nuclei were found in all cases, including those for which cytogenetic analysis of short-term cultures had not disclosed any trisomic cells. Overall, the trisomic cells were scattered within the tissue. However, small clusters of cells with +7 were found in three cases. By hematoxylin-eosin staining of the slides used for FISH analysis it could be shown that the clustered trisomic cells were proliferating synoviocytes within villous extensions of the synovial membrane.



  • Environmental Health and Occupational Health
  • Cancer and Oncology
  • Orthopedics
  • Medical Genetics
  • Molecular biology
  • Diseases of the osteoarticular system
  • Arthropathy
  • Degenerative disease
  • Inflammatory joint disease
  • Genetics
  • Chromosomal aberration
  • Aneuploidy
  • Chronic
  • Trisomy
  • Distribution
  • Frequency
  • Synovial fluid
  • Chromosome 7
  • Fluorescence in situ hybridization
  • Osteoarthritis
  • Cytogenetics
  • Human
  • Pigmented villonodular synovitis


  • ISSN: 0165-4608

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