Fig. 7From: In vitro study of cartilage tissue engineering using human adipose-derived stem cells induced by platelet-rich plasma and cultured on silk fibroin scaffoldHypothesis mechanism that occurred in the ADSC-SS PRP group. TGF-β protein in the medium is suggested to be recruited by the ADSC-SS PRP group to induce condrogenesis on days 7, 14, and 21 of observation. Up (↑) and down (↓) arrow in grey box showed the higher (↑) or lower (↓) concentration of mRNA/protein that measuredBack to article page