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Chondromyxoid fibroma resembles in vitro chondrogenesis, but differs in expression of signalling molecules
Author(s) -
Romeo Salvatore,
Bovée Judith VMG,
Grogan Shawn P,
Taminiau Antonie HM,
Eilers Paul HC,
CletonJansen Anne Marie,
MainilVarlet Pierre,
Hogendoorn Pancras CW
Publication year - 2005
Publication title -
the journal of pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.964
H-Index - 184
eISSN - 1096-9896
pISSN - 0022-3417
DOI - 10.1002/path.1782
Subject(s) - chondrogenesis , chondromyxoid fibroma , extracellular matrix , microbiology and biotechnology , cartilage , chondrocyte , cyclin d1 , mesenchymal stem cell , biology , chemistry , pathology , anatomy , cell , genetics , medicine , cell cycle
Chondromyxoid fibroma is a rare benign cartilaginous bone tumour characterized by morphological features that resemble different steps of chondrogenesis in terms of both cellular morphology, ranging from spindled to rounded cells, and the extracellular matrix formed, which ranges from fibrous to cartilaginous. The presence in chondromyxoid fibroma of signalling molecules that regulate the spatial expression of proteins involved in normal cartilage proliferation and differentiation was investigated in samples from 20 patients and compared with articular chondrocytes from 11 normal donors cultivated in 3D pellet culture. Sections were stained with safranin‐O and H&E, and immunohistochemistry was performed for p16, cyclin D1, FGFR3, BCL2, p21, PTHLH, PTHR1 and N‐cadherin. Expression patterns were analysed using hierarchical clustering. In chondromyxoid fibroma, specific morphological features correlated with a distinct pattern of expression. Comparison with normal chondrocytes in pellet culture showed a striking morphological resemblance, but with an unmistakably different pattern of expression. N‐cadherin, PTHLH, and PTHR1 were expressed to a significantly higher level ( p < 0.01) in articular chondrocyte pellets but, conversely, there was significantly lower expression of cyclin D1, p16 and BCL2 ( p < 0.05) in these cells. Morphological similarities reflect common steps in cartilage differentiation, albeit driven by different molecular mechanisms. The proteins we have found to be differentially expressed seem crucial for neoplastic chondrogenesis. Copyright © 2005 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.