TGFB1 and keloid: When keratinocytes or fibroblasts derived from either normal skin tissue or keloid tissues (Termed NKs, KKs, NFs, KFs, respectively) were cultured using transwell culture dishes, the combined culture of KKs and KFs more effectively increased the proliferation of fibroblasts than any other combination, and this effect was attenuated by a pan-TGF-β neutralizing antibody [147].