Responses

No, Isis' curse was not this specific curse, that was a completely different one. This curse came from Seth's weapon, that Seth created in order to be able to inflict a deadly cursed wound on Osiris (but it failed because Osiris tricked Seth into using the weapon to inflict the cursed wound on Anubis, whom Osiris was possessing).
It was isis who cast the cursed, not seth T^T it was osiris who started it that mofo waaah T^T