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Fibronectin in human solid tumors

S Stenman, A Vaheri

    International Journal of Cancer
    |January 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    Fibronectin surrounds sarcoma and benign soft-tissue tumor cells in vivo, but not carcinoma cells. This difference in fibronectin distribution can distinguish between these tumor types.

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    Area of Science:

    • Oncology
    • Cell Biology
    • Immunohistochemistry

    Background:

    • Fibronectin is a key extracellular matrix protein involved in cell adhesion, migration, and tissue organization.
    • The in vivo distribution of fibronectin in human solid tumors has not been extensively characterized, particularly in comparison to cell culture findings.

    Purpose of the Study:

    • To investigate the presence and distribution of fibronectin in various human solid tumors using indirect immunofluorescence staining.
    • To determine if fibronectin distribution can serve as a distinguishing marker between different tumor types, specifically carcinomas and sarcomas.

    Main Methods:

    • Indirect immunofluorescence staining was employed to examine fibronectin expression in biopsy samples.
    • A total of 73 human solid tumors were analyzed, including sarcomas, melanomas, carcinomas, and benign tumors of soft tissue and epithelial origin.

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    Main Results:

    • Sarcoma cells and benign soft-tissue tumor cells exhibited a pericellular fibronectin network continuous with the stroma.
    • Carcinoma cells and their periphery lacked detectable fibronectin; however, their reactive connective tissue stroma was strongly positive for fibronectin.
    • Benign epithelial tumor stroma also showed strong positive staining for fibronectin.

    Conclusions:

    • In vivo, sarcoma and benign soft-tissue tumor cells possess fibronectin in their pericellular matrix, contrasting with in vitro observations.
    • The distinct fibronectin distribution patterns observed in vivo allow for differentiation between carcinomas and sarcomas.