Although data on 4MU inhibition of HSD17B13 are missing from the PubChem BioAssay database, the high homology of HSD17 family members and inhibition of b3, b4 and b10 by low micromolar concentration of 4MU allow us to infer the possible inhibition of HSD17b13 activity by 4MU, which may contribute to its protective effect in liver fibrosis [6]. This evidence concerns the gene IGKV4-1 and Hepatic fibrosis.