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Cell adhesion is the process by which cells interact and attach to neighbouring cells through specialised molecules of the cell surface. This process can occur either through direct contact between cell surfaces such as cell junctions or indirect interaction, where cells attach to surrounding extracellular matrix , a gel-like structure ...
Cell adhesion molecules (CAMs) are a subset of cell surface proteins [1] that are involved in the binding of cells with other cells or with the extracellular matrix (ECM), in a process called cell adhesion. [2] In essence, CAMs help cells stick to each other and to their surroundings.
L1-Cell Adhesion Molecule (L1CAM) was first discovered to be important in neuron-related tissue development in the mid-1980s, and is a trans-membranal glycoprotein of approximately 200-220 kDa. On its extracellular domain, the L1CAM protein includes IgG -like and fibronectin -III (FN-III) repeats which allow for interaction with integrins and ...
Cell junctions [1] or junctional complexes are a class of cellular structures consisting of multiprotein complexes that provide contact or adhesion between neighboring cells or between a cell and the extracellular matrix in animals. [2] They also maintain the paracellular barrier of epithelia and control paracellular transport. Cell junctions ...
The neural cell adhesion molecule NCAM1 appears on early embryonic cells and is important in the formation of cell collectives and their boundaries at sites of morphogenesis. Later in development, NCAM1 (CD56) expression is found on various differentiated tissues and is a major CAM mediating adhesion among neurons and between neurons and muscle.
As the cell progresses along its chosen path, a given focal adhesion moves closer and closer to the trailing edge of the cell. At the trailing edge of the cell the focal adhesion must be dissolved. The mechanism of this is poorly understood and is probably instigated by a variety of different methods depending on the circumstances of the cell.
There are three subsets of selectins: E-selectin (in endothelial cells); L-selectin (in leukocytes); P-selectin (in platelets and endothelial cells); L-selectin is the smallest of the vascular selectins, expressed on all granulocytes and monocytes and on most lymphocytes, can be found in most leukocytes.
In normal cells, growth is controlled by contact inhibition in which contact with neighboring cells causes a stunt in cell growth. Contact inhibition is thought to be mediated by cadherins, proteins that play an important role in cell adhesion. This inhibition prevents cells from piling up on top of one another and forming mounds.
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