The dancing molecules lead to gene expression which then starts regenerating the cartilage. They are basically an on switch for the repair. This is massive as it could prevent cardiac arrest from occurring down the road. When cardiac arrest takes place, the chances of it happening again drastically increase due to an alternation of the immune cells made in the heart.
For my fellow nerds, cardiac arrest leads to Th2 immune cell production in the heart instead of Th1, and Th2 is great against parasites, but that’s not very helpful at keeping the heart safe. Th2 is also involved in most allergies, which isn’t ideal here either. Meaning, by turning on repair genes in the heart before things get more out of line, it will decrease the chances of cardiac arrest, which has numerous benefits immediately as well as down the road.
Like most biological reactions, tissue repair is regulated in a feedback loop. So the dancing molecules get the process started, and once complete the body then stops, as this allows for energy conservation.