CCL27 and colitis: Further, our scRNA‐seq analysis showed that the mRNA level of nicotinamide phosphoribosyltransferase (Nampt), encoding rate‐limiting enzyme of NAD+ salvage pathway, is expressed at the highest level in ILC2s compared to other ILC subsets in the gut (Figure 3K), suggesting that ILC2s might be the corresponding ILC subset in liver injury‐exacerbated colitis.