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Pathol Oncol Res. 2000;6(1):24-6.

High production of SPARC/osteonectin/BM-40 in mouse metastatic B16 melanoma cell lines.

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Kanagawa Dental College, Department of Biochemistry 82 Inaoka-cho, Yokosuka, 238-8580, Japan.


Production of SPARC/osteonectin/BM-40 was determined in mouse B16 melanoma clones BL6 and F10 (high metastatic) and F1 (low metastatic). SPARC was produced greater amount in BL6 and F10 than in F1 cells, showing a good agreement with their metastatic potentials. Moreover, SPARC production was not influenced by culture pH, even in the acidic conditions (= pH 5.9). Although tumor tissues show often low pH due to excessive amount of acidic metabolites such as lactate, most studies have been done in neutral pH. High SPARC production in the acidic medium, therefore, is thought to be an important potential for tumor invasive behaviour.

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