Transmission of hormonal stimulation by cell-to-cell communication

Abstract
Rat ovarian granulosa cells and mouse myocardial cells respond to cell-specific hormones by cyclic[c]AMP-dependent mechanisms. In coculture, these heterologous cells communicate by means of gap junctions. Exposure of the cocultures to a hormone specific for 1 cell type causes the heterologous cells to respond through a cell contact-dependent mechanism. These studies suggest that this cross-stimulation results from the intercellular communication of a mediator that is common to both cell types. The communicated mediator may be cAMP.