KMO and keratosis pilaris: In the disorder of KP, the researchers also found that a systemic inflammatory induced by IDO expression was not related to interferon‐γ (IFN‐γ) production, and KAT expression was much higher than KMO expression which may cause acute inflammation‐induced the induction of KMO neurotoxicity (Connor, Starr, O'Sullivan, & Harkin, 2008).