Increased levels of one of these initiation factors often trigger a cascade of events that leads to increased levels of other initiation factors meaning that neuronal apoptosis is being induced by multiple things at any given time.
Increased levels of one of these initiation factors often trigger a cascade of events. These events leads to increased levels of other initiation factors. Neuronal apoptosis is being induced by multiple things at any given time. This is what these other initiation factors are meaning.