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Myxoid tumours of soft tissue: the so-called myxoid extracellular matrix is heterogeneous in composition

Willems, S. M., Schrage, Y. M., Baelde, J. J., Briaire-de Bruijn, I., Mohseny, A., Sciot, R., Bovée, J. V. M. G. & Hogendoorn, P. C. W., 2008, In : Histopathology. 52, 4, p. 465-474 10 p.

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  • Myxoid tumours of soft tissue the so‐called myxoid extracellular matrix is heterogeneous in composition

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DOI

  • S M Willems
  • Y M Schrage
  • J J Baelde
  • I Briaire-de Bruijn
  • A Mohseny
  • R Sciot
  • J V M G Bovée
  • P C W Hogendoorn

AIM: Myxoid tumours of soft tissue are characterized by their so-called 'myxoid' extracellular matrix. The aim was to investigate the composition and possible function of this matrix which is poorly understood.

METHODS AND RESULTS: Using Alcian Blue staining with and without pretreatment with hyaluronidase and application of the critical electrolyte concentration method followed by densitometry, the glycosaminoglycan composition of three different myxoid tumours was studied. The composition of glycosaminoglycans varied with tumour type and grade, despite their general characterization as myxoid tumours. Intramuscular myxoma contained similar amounts of the various glycosaminoglycans as grade I myxofibrosarcoma; grade III myxofibrosarcoma contained less hyaluronic acid and more heparan sulphate, whereas extraskeletal myxoid chondrosarcoma contained predominantly chondroitin-4 and -6 sulphates. Western blot identified albumin as a major protein in tumour lysates, and its presence in the extracellular matrix and cytoplasm of the majority of tumours was demonstrated by immunohistochemistry; production of albumin by the tumour cells was confirmed by quantitative polymerase chain reaction.

CONCLUSIONS: The extracellular matrix of myxoid tumours of soft tissue has a heterogeneous composition consisting of, amongst others, glycosaminoglycans and albumin, which appear to play an active role in their morphogenesis.

Original languageEnglish
Pages (from-to)465-474
Number of pages10
JournalHistopathology
Volume52
Issue number4
Publication statusPublished - 2008
Externally publishedYes

    Keywords

  • Adult, Aged, Aged, 80 and over, Albumins/chemistry, Alcian Blue/chemistry, Blotting, Western, Coloring Agents/chemistry, Extracellular Matrix/chemistry, Female, Glycosaminoglycans/chemistry, Humans, In Situ Hybridization, Male, Middle Aged, Myxoma/chemistry, Neoplasm Staging, RNA, Messenger/metabolism, Retrospective Studies, Soft Tissue Neoplasms/chemistry, Tissue Array Analysis

ID: 124022904