Publication details

Cathepsin D expression as a regulator of breast cancer cell migration and chemosensitivity

Authors

BENEŠ Petr JANČEKOVÁ Blanka KNOPFOVÁ Lucia ŠMARDA Jan

Type Conference abstract
MU Faculty or unit

Faculty of Science

Citation
Description The lysosomal aspartic protease cathepsin D (cath-D) is often over-expressed in breast cancer and acts as a mitogen on both cancer and stromal cells. The ability of cath-D to stimulate cancer cell migration remains controversial. To determine whether cath-D expression modulates breast cancer cell migration in vitro, we performed a real-time analysis of MDA-MB-231 breast cancer cell migration using novel methodology based on impedance measurement that enables continuous monitoring of the transition of the cells through a microporous membrane [xCELLigence equipped with CIM-plate 16 (Roche)]. We observed that altering cath-D level by either siRNA or cDNA tranfections significantly affected migration of MDA-MB-231 cells. Tumor cells have often impaired classical caspase-dependent apoptosis pathway and may be therefore more sensitive to agents that trigger alternative cell death pathways. Targeting lysosomes represents a method of choice as many human tumors have increased levels of lysosomal proteases.
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