The blog is highly suspect, but the study is real. That said it’s not a big deal.

Curing cancer in a mouse model is not at all uncommon in new therapies. Mouse models like this are vastly easier to treat than real world cancer for a bunch of reasons. Fully curing mice is the baseline for a treatment to even be considered for further evaluation. And even then very few therapies end up succeeding in humans - low single digit percent.

So yes, another possible treatment. But not at all a breakthrough.