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Contrasting migratory response of astrocytoma cells to tenascin mediated by different integrins
A. Giese, M.A. Loo, S.A. Norman, S. Treasurywala, M.E. Berens
Journal of Cell Science 1996 109: 2161-2168;
A. Giese
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M.A. Loo
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S.A. Norman
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S. Treasurywala
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M.E. Berens
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Summary

Tenascin, an extracellular matrix protein, is expressed in human gliomas in vitro and in vivo. The distribution of tenascin at the invasive edge of these tumors, even surrounding solitary invading cells, suggests a role for this protein as a regulator of glioma cell migration. We tested whether purified tenascin, passively deposited on surfaces, influenced the adhesion or migration of a human gliomaderived cell line, SF-767. Adhesion of glioma cells to tenascin increased in a dose-dependent fashion up to a coating concentration of 10 micrograms/ml. Higher coating concentrations resulted in progressively fewer cells attaching. Cell adhesion could be blocked to basal levels using anti-beta 1 integrin antibodies. In contrast, when anti-alpha v antibodies were added to the medium of cells on tenascin, cell adhesion was enhanced slightly. Using a microliter scale migration assay, we found that cell motility on tenascin was dose dependently stimulated at coating concentrations of 1 and 3 micrograms/ml, but migration was inhibited below levels of non-specific motility when tested at coating concentrations of 30 and 100 micrograms/ml. Migration on permissive concentrations of tenascin could be reversibly inhibited with anti-beta 1, while treatment with anti-alpha v antibodies increased migration rates. We conclude that SF-767 glioma cells express two separate integrin receptors that mediate contrasting adhesive and migratory responses to tenascin.

  • © 1996 by Company of Biologists
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Contrasting migratory response of astrocytoma cells to tenascin mediated by different integrins
A. Giese, M.A. Loo, S.A. Norman, S. Treasurywala, M.E. Berens
Journal of Cell Science 1996 109: 2161-2168;
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Contrasting migratory response of astrocytoma cells to tenascin mediated by different integrins
A. Giese, M.A. Loo, S.A. Norman, S. Treasurywala, M.E. Berens
Journal of Cell Science 1996 109: 2161-2168;

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