Is there a way to block pain -- true or false

New Research

Recently published on Nov. 26th there was a new medical discovery that seems intriguingly like a glimmer of hope for those of us with all sorts of pain. In Saint Louis University, a way to block the pain pathways in animals. This would mean that they are stopping neuropathic pain at an animal level which is promising and hopeful for humans. You can read the article here, its titled 'Off switch' for pain discovered: Activating the adenosine A3 receptor subtype is key to powerful pain relief

So if there is this way to block pain in tiny animals do you think they will find a way to help humans? 

It seems to me that our brains are far more complex to those of rats with brains the size of my thumb. Could there really be hope, or is this a cruel statement prematurely made? 

~Elysia B