c-Myb-induced migration and invasiveness of breast and colon cancer cells are associated with up-regulation of cathepsin D

• Authors: KNOPFOVÁ Lucia; PEKARČÍKOVÁ Lucie; BENEŠ Petr; ŠMARDA Jan
• Year of publication: 2010
• Type: Conference abstract
• MU Faculty or unit: Faculty of Science
• Description: c-Myb is essential regulator of stem-progenitor cells in bone marrow, colon epithelia and neurogenic niches in brain. Malfunction of c-Myb results in malignancies of several types including breast and colon cancer. Its role in control of invasion and metastasis of tumor cells remains unclear. This study shows that overexpession of c-Myb enhances ability of human breast cancer MDA-MB-231 cells and mouse colon cancer CT26 cells to migrate and invade Matrigel in vitro. Real-time analysis of cell migration and invasion using the xCELLigence RTCA system revealed dynamics of c-Myb-induced effects with rapid onset of migration and invasion during first 6 and 12 hours, respectively. Real-time PCR screening revealed up-regulation of cathepsin D and matrix metalloproteinase 9 (MMP9) mRNAs coding for proteases that promote invasive behavior in c-Myb-overexpressing cells. Further experiments confirmed that increased production of cathepsin D and MMP 9 correlate with c-Myb-induced invasivity of MDA-MB-231 cells.

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