An international team of scientists led by researchers from the University of Copenhagen has identified a new mechanism for how animal cells maintain their shape and integrity. The discovery could pave the way for new treatments for a range of diseases, including cancer and muscular dystrophy.
All animal cells are surrounded by a thin membrane that acts as a barrier to the outside world. This membrane is made up of a phospholipid bilayer, which is a double layer of lipids (fatty molecules) with hydrophilic (water-loving) heads and hydrophobic (water-hating) tails. The hydrophobic tails of the lipids face inward, away from the water-based environment inside and outside the cell. This arrangement creates a barrier that prevents water and other polar molecules from passing through the membrane.
In order for cells to function properly, they must be able to maintain their shape and integrity. This is achieved by a number of mechanisms, including the cytoskeleton, which is a network of protein filaments that runs throughout the cell. The cytoskeleton helps to maintain the cell's shape and supports the cell membrane.
The newly discovered mechanism for maintaining cell shape and integrity involves a protein called myosin-10. Myosin-10 is a motor protein that moves along the cytoskeleton, carrying a variety of cellular cargoes. The researchers found that myosin-10 also binds to the cell membrane, where it helps to stabilize the phospholipid bilayer.
When myosin-10 is depleted from cells, the cells become more fragile and are more likely to rupture. This suggests that myosin-10 plays an important role in maintaining cell integrity.
The researchers believe that the discovery of this new mechanism for maintaining cell shape and integrity could pave the way for new treatments for a range of diseases. For example, drugs that target myosin-10 could potentially be used to treat diseases like cancer and muscular dystrophy, which are characterized by the breakdown of cell structure.
The study is published in the journal _Nature Cell Biology_.
