Notification to all subscribers of asset chain

 Is it possible to send notifications to subscribers of  all other assets which has the relationship chain.  for example chain is like that  A --> B --> C --> D  if  D changes, normally RAM send notification to subcribers of D and C..as I know (If I configured notifications options) , but they want to send to all subcriber of A, B, C..
Or maybe just for specific relation types. I mean C has another relation type with X but they don't want to send notification to subscribers of X.    They want to send notification to the specific relationship chain.  Is it possible to do it by coding or any other suggestion.

Regards,
Halil B.