“…These aHSCs express PDGF-bb, TGF-β, IL-6 and IL-1b. While liver CAFs do present with an increased expression of HGF, FGF, and VEGF, when compared to aHSCs [ 68 ], pan-CAF markers that were recently used for cluster definition on single cell RNA sequencing (sc-RNA seq) data include only genes that are also highly expressed by non-tumour- associated HSCs (Schwabe, Pan-CAF signature: Col1a1, Col1a2, Col3a1, C1s1, Acta2, C1ra, Serpinf1, Pdgfrβ, Col12a1) [ 9 , 11 ]. Because of the poor definition of CAFs, many researchers choose to use HSCs instead of CAFs when studying the role of fibroblasts in liver cancer (see Section 5 and Section 6 ).…”