Cell-Cell Interactions and Adhesion

Selectins are cell adhesion molecules expressed on the surface of immune cells and endothelial cells. They play a crucial role in the initial attachment and rolling of leukocytes on the endothelium during immune responses.

Tight junctions are specialized cell-cell adhesion structures found in epithelial tissues. They form a continuous seal between adjacent cells, preventing the leakage of molecules and maintaining tissue integrity.

Gap junctions are specialized channels that connect the cytoplasm of adjacent cells, allowing the direct exchange of small molecules, ions, and electrical signals between them.

Cadherins are a family of cell adhesion molecules that play a crucial role in cell-cell recognition and adhesion. They bind to cadherins on adjacent cells, forming strong intercellular connections.

Integrins are cell adhesion molecules that bind to specific ligands in the extracellular matrix, such as collagen, fibronectin, and laminin. They play a crucial role in cell attachment, spreading, and migration.

Desmosomes are specialized cell-cell adhesion structures that anchor intermediate filaments to the plasma membrane, providing mechanical strength and stability to tissues.

Paracrine signaling is a type of cell-cell communication in which a cell releases signaling molecules that act on nearby cells, influencing their behavior and responses.

The extracellular matrix (ECM) plays a multifaceted role in cell-cell interactions. It provides structural support and organization to tissues, mediates cell-cell adhesion and migration, and stores growth factors and cytokines that regulate cellular behavior.

Neurexins are cell adhesion molecules expressed on the surface of neurons. They play a crucial role in the formation and maintenance of synapses, the specialized junctions between neurons that allow for interneuronal communication.

Gap junctions are specialized channels that connect the cytoplasm of adjacent cells, allowing the direct exchange of small molecules, ions, and electrical signals between them.

Endocrine signaling is a type of cell-cell communication in which a cell releases hormones that travel through the bloodstream to distant target cells, influencing their behavior and responses.

Hemidesmosomes are specialized cell-matrix adhesion structures that anchor the basal surface of epithelial cells to the underlying basement membrane, providing structural support and stability to the epithelium.

Dystroglycans are cell adhesion molecules expressed on the surface of muscle cells. They play a crucial role in the formation and maintenance of the neuromuscular junction, the specialized synapse between neurons and muscle cells.

Adherens junctions are specialized cell-cell adhesion structures that anchor actin filaments to the plasma membrane, providing mechanical strength and stability to tissues.

Synaptic transmission is a type of cell-cell communication in which a neuron releases neurotransmitters that act on receptors on the surface of adjacent neurons, influencing their behavior and responses.