Heterocellular coupling

Heterocellular coupling refers to the general phenomenon of intercellular communication, specifically the metabolic or electrical coupling between distinct cell types via structures such as gap junctions. It is not a single molecule, protein, receptor, or gene, but rather describes a mode of interaction between different classes or types of cells—such as between different neuronal or cardiac cell types—enabling signaling and coordination in tissues[1][2][3]. In the retina, for example, heterocellular coupling may occur between amacrine cells and ganglion cells via gap junctions, facilitating communication between cell superclasses with distinctly different morphologies[1]. Similarly, in the heart, heterocellular coupling underlies complex multicellular integration among the diverse constituents of cardiac tissue[3]. Heterocellular coupling, therefore, is a biological process or structural arrangement, not a discrete therapeutic target.