I don't think the term "asynchronous" adequately covers the situation. Even asynchronous messages are sent to specific objects in OO. In biological systems, senders and receivers do not know each other, or are not even aware of each other's existence. A model from computer science that corresponds better to biological systems is that of the untyped queue. But in biology, information is encoded not only in the type, but e.g. also in concentration of molecules; there is also no message order, but communication is subject to stochastic processes.
