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A majority of small cell lung cancer (SCLC) cells lack a metastasis suppressor, tetraspanin CD9, and CD9 expression promotes their apoptosis. By a proteomics-based approach, we compared an SCLC cell line with its CD9 transfectant and found that a calcium-binding neuronal protein, calretinin, is upregulated in CD9-positive SCLC cells. Ectopic or anticancer drug-induced CD9 expression upregulated calretinin,...
CXCL12 is a chemokine essential for the organ-specific spread of a variety of cancers including small cell lung cancer (SCLC). Here, we examined the anti-metastatic efficacy of TF14016, a small peptidic inhibitor of CXCL12 receptor CXCR4, in SCLC. Treatment of mice with TF14016 significantly suppressed pulmonary metastases of CXCR4-expressing SCLC in size and number. Furthermore, histological examination...
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