Role of Intermediate Filaments in cell - cell signalling
There are desmosomes and gap junctions (cell-cell-contact), and hemidesmosomes (cell-basal membrane-contact) which enable a stable united cell structure. I'm not so aware with this topic, but I found some papers which may help you :)

Intermediate filament in cell architecture

Desmosomes and hemidesmosomes

Review on gap junctions

Blood-testis barrier and different cell-cell-contact structures