Effect of Ion Transporters in Brain Tumor Stem Cell Migration
Dr. Quinones-Hinojosa's laboratory and others have discovered that a protein ion cotransporter NKCC1 may hold clues to how glioblastoma invades the normal brain. The lab is studying how this protein maneuvers the cell and working to pinpoint new molecular targets for targeted cancer therapy.
The team has previously found that cells with an over-expression of NKCC1 appear to move farther and faster than regular cells in validated experiments. The electroneutral NKCC1 protein allows the cell to grip more tightly to adjacent tissue, allowing the cell to propel itself farther through the brain.
When cells underexpressed NKCC1 or were depleted of the protein, focal adhesion molecules that served as Velcro-like sources were bigger and kept the cells anchored in place, making it harder for the cells to propel through the brain and decreasing migration.
Understanding how cancer cells use NKCC1 to migrate and invade healthy brain, brings scientists closer to understanding how and where to target glioblastoma effectively. For example, bumetanide, a simple water pill routinely used to reduce swelling and fluid retention caused by various medical problems, blocks NKCC1. The lab found that when bumetanide was added to human tumor cells, it blocked the NKCC1 channel and slowed the pace of cell movement both in the petri dish and in mice with cancer. These findings allow for the potential use of bumetanide in a human clinical setting.
Lab members studying the effect of the NKCC1 ion cotransporter in brain tumor stem cell migration include:
- Paula Valentina (Paula) Schiapparelli, Ph.D.
Digital imaging in analysis of cancer cell migration
The lab performs digital imaging to analyze the characteristic migratory features of individual cancer cells. Published in PLOS BIOLOGY. 2012;10:e1001320. Used with permission.
Using special platforms to study cell migration
The lab uses specially designed platforms called nanopatterns to study the migratory capabilities of cancerous cells. Published in PLOS BIOLOGY. 2012;10:e1001320. Used with permission.
Analysis of a cancer cell spreading
High-definition imaging allows real-time visualization of the cytoskeleton inside and outside cancerous cells.
Molecular markers in analysis of cancer cell migration
The lab uses different molecular markers to label cancerous cells to identify their special characteristics. Published in PLOS BIOLOGY. 2012;10:e1001320. Used with permission.
Analysis of cancer cell migration
NKCC1, a channel highly expressed in brain cancer cells, is found to affect the cytoskeleton in such a way that allows cancer cells to be highly migratory.