This is all interesting, and warrants more actual research, but it's on a rat study that did not control for calories, so it's not super useful because we also know that:

1. Rats metabolisms are very different from primate and specifically human metabolisms

2. Even if they are the same, we already know that eating a caloric surplus contributes to inflammation, so it's difficult to disambiguate the effects of eating keto vs. the effects of eat fewer calories (which people on keto tend to do).

Nothing against keto, if it allows you to comply to eating the right amount of food that's great, but controlling for calories there isn't a ton of evidence in its efficacy over carbohydrate inclusive diets.