Title:Circulating MicroRNAs and Blood-Brain-Barrier Function in Breast Cancer Metastasis
Volume: 26
Issue: 13
Author(s): Carolin J. Curtaz, Constanze Schmitt, Kinga G. Blecharz-Lang, Norbert Roewer, Achim Wöckel and Malgorzata Burek*
Affiliation:
- Department of Anaesthesia and Critical Care, University of Würzburg, 97080 Würzburg,Germany
Keywords:
Metastatic breast cancer, blood-brain barrier, in vitro models, microRNA, extracellular vesicles (EVs), brain metastases.
Abstract: Brain metastases are a major cause of death in breast cancer patients. A key event in the metastatic
progression of breast cancer in the brain is the migration of cancer cells across the blood-brain barrier (BBB). The
BBB is a natural barrier with specialized functions that protect the brain from harmful substances, including antitumor
drugs. Extracellular vesicles (EVs) sequestered by cells are mediators of cell-cell communication. EVs
carry cellular components, including microRNAs that affect the cellular processes of target cells. Here, we summarize
the knowledge about microRNAs known to play a significant role in breast cancer and/or in the BBB
function. In addition, we describe previously established in vitro BBB models, which are a useful tool for studying
molecular mechanisms involved in the formation of brain metastases.