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The expression of ccn3(nov) gene in musculoskeletal tumors
Maria Cristina Manara1, Bernard Perbal, Stefania Benini
1Laboratorio di Ricerca Oncologica, Istituti Ortopedici Rizzoli, Bologna, Italy.
Abstract:
The CCN3(NOV) protein belongs to the CCN [cysteine-rich CYR61, connective tissue growth factor (CTGF), nephroblastoma overexpressed gene (Nov)] family of growth regulators, sharing a strikingly conserved multimodular organization but exhibiting distinctive functional features. Although previous studies have revealed an expression of CCN3 protein in several normal tissues, including kidney, nervous system, lung, muscle, and cartilage, less is known about its expression in tumors. In this study, we analyzed the expression of CCN3 in musculoskeletal tumors, using a panel of human cell lines and tissue samples. An association between CCN3 expression and tumor differentiation was observed in rhabdomyosarcoma and cartilage tumors, whereas, in Ewing's sarcoma, the expression of this protein seemed to be associated with a higher risk to develop metastases. CCN3 expression was found in 15 of 45 Ewing's sarcoma tissue samples. In particular, we did not observe any expression of CCN3 in the 15 primary tumors that did not develop metastases. In contrast, 15 of the 30 primary tumors that developed lung and/or bone metachronous metastases showed a high expression of the protein (P < 0.001, Fisher's test). Our studies indicate that CCN3 is generally expressed in the cells of the musculoskeletal system. This protein may play a role both in normal and pathological conditions. However, the regulation of CCN3 expression varies in the different neoplasms and depends on the type of cells. Thus, as reported for other CCN genes, the biological properties and regulation of expression of CCN3 are dependent on the cellular context and the nature of the cells in which it is produced. Further studies will help to clarify the biological role of this protein in musculoskeletal neoplasms.
Insights
The CCN3 (NOV) protein, part of the CCN family, is expressed in musculoskeletal tissues. Its expression in Ewing
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- The CCN family of proteins, including CCN3 (also known as NOV), are regulators of cell growth and possess conserved structural features.
- While CCN3 expression is documented in various normal tissues, its role and expression patterns in tumors, particularly musculoskeletal neoplasms, remain less understood.
Purpose of the Study:
- To investigate the expression of CCN3 protein in musculoskeletal tumors.
- To determine any potential associations between CCN3 expression and tumor differentiation, metastasis, or risk in specific tumor types.
Main Methods:
- Analysis of CCN3 protein expression using a panel of human cell lines and tissue samples from musculoskeletal tumors.
- Statistical analysis (Fisher's test) to evaluate the association between CCN3 expression and clinical outcomes, such as metastasis development.
Main Results:
- CCN3 expression was observed in musculoskeletal tissues and varied across different tumor types.
- In rhabdomyosarcoma and cartilage tumors, CCN3 expression correlated with tumor differentiation.
- In Ewing's sarcoma, high CCN3 expression was significantly associated with the development of lung and/or bone metastases (P < 0.001), with no expression detected in primary tumors that did not metastasize.
Conclusions:
- CCN3 is generally expressed in musculoskeletal cells and may play roles in both normal and pathological conditions.
- The regulation and biological functions of CCN3 are context-dependent, varying with tumor type and cellular origin.
- CCN3 expression, particularly in Ewing's sarcoma, may serve as a potential biomarker for metastatic potential, warranting further investigation into its precise role in musculoskeletal neoplasms.