Related Experiment Video
Updated: Jun 27, 2026
22:49
Optimized Staining and Proliferation Modeling Methods for Cell Division Monitoring using Cell Tracking Dyes
Published on: December 13, 2012
Chloride accumulation drives volume dynamics underlying cell proliferation and migration
Christa W Habela1, Nola Jean Ernest, Amanda F Swindall
1Department of Neurobiology, Center for Glial Biology in Medicine, University of Alabama, 1719 6th Ave. S., CIRC 425, Birmingham, AL 35294, USA.
Journal of Neurophysiology
|November 28, 2008
Summary
Intracellular chloride (Cl-) regulates cell volume in glioma cells, crucial for migration and proliferation. This mechanism, vital for developing brain cells, may also apply to other immature brain cells.
Area of Science:
- Neuroscience
- Cell Biology
- Oncology
Background:
- Cell migration during brain development requires significant cell volume changes.
- This volume regulation is also critical in primary brain tumors, particularly gliomas.
- Intracellular chloride (Cl-) concentration is a key factor in cell volume control.
Purpose of the Study:
- To investigate the role of intracellular Cl- in regulating cell volume and migration in glioma cells.
- To explore the mechanism of Cl- flux and its impact on cell volume.
- To determine if this mechanism is relevant to cell division and proliferation.
Main Methods:
- Glioma cells were used to study spontaneous volume changes.
- The flux of Cl- and water across the cell membrane was analyzed.
- GABA-gated Cl- channels were exogenously expressed to manipulate Cl- gradients.
- Cell volume changes and migration in constrained environments were measured.
- Intracellular Cl- concentration ([Cl-]i) was monitored during cell division.
Main Results:
- Glioma cells accumulate Cl- to approximately 100 mM, exceeding Nernst equation predictions.
- Opening GABA-gated Cl- channels reduced cell volume by 33% and impaired migration.
- Dividing cells release intracellular Cl- (a 40-mM decrease in [Cl-]i) during cytoplasmic condensation before mitosis.
- Intracellular Cl- acts as an osmotic regulator, driving volume changes.
Conclusions:
- Intracellular Cl- is a critical regulator of cell volume in glioma cells.
- This Cl--mediated volume control is essential for cell migration and proliferation.
- The studied mechanism in CNS malignancies may be conserved in other immature brain cells.
Related Concept Videos
02:36Cells Coordinate Growth and Proliferation
Cell size is a significant factor impacting cellular design, function, and fitness. There exists some internal coordination by which cells double their masses before division, thus, achieving homeostasis. Coordination between cell growth and proliferation depends on the checkpoints in between cell cycle phases. Loss of coordination or failure in the checkpoint mechanism can drive the cell to uncontrolled growth and loss of cellular function. Like dividing cells that coordinate cellular growth,...
02:36Cells Coordinate Growth and Proliferation
Cell size is a significant factor impacting cellular design, function, and fitness. There exists some internal coordination by which cells double their masses before division, thus, achieving homeostasis. Coordination between cell growth and proliferation depends on the checkpoints in between cell cycle phases. Loss of coordination or failure in the checkpoint mechanism can drive the cell to uncontrolled growth and loss of cellular function. Like dividing cells that coordinate cellular growth,...
01:21Chemotaxis and Direction of Cell Migration
Cells can detect chemical cues in their environment and reorganize the cytoskeleton to migrate toward them or away from them. This directional migration, called chemotaxis, is essential during embryogenesis and development, immune response, tissue repair and regeneration, and reproduction. These chemical cues can either attract or repel the cell's movement. For example, axon development is determined by a combination of chemoattractants and chemorepellents that direct the growing axon towards...
01:19Cell Migration
Cell migration is a process by which the cells move from one location to another, playing an essential role in embryological development, repair and regeneration, immune response, and metastasis. Cells migrate in response to chemical or mechanical signals generated by specific organs or tissues. The overall mechanism includes three steps - polarization, protrusion, and release. Polarization involves the formation of a distinct cell front and rear, which determines the direction of movement.
01:09Cell Migration
Cell migration, the process by which cells move from one location to another, is essential for the proper development and viability of organisms throughout their life. When cells are not able to migrate properly to their ordained locations, various disorders may occur. For example, disruption in cell migration causes chronic inflammatory diseases such as arthritis.
01:26Cellular Adaptation III: Hyperplasia
Hyperplasia is an increase in the number of cells in a tissue or organ due to enhanced cell division. It is an adaptive, controlled response to stimuli such as injury, hormones, or stress, involving mitosis to produce genetically identical cells and support tissue repair and regeneration.Tissue CapacityCertain tissues, including the epidermis, intestinal epithelium, bone marrow, and fibroblasts, have a high potential for hyperplasia. Others, such as bone, cartilage, and smooth muscle, show...