Table 1.

Markers measured in the supernatant of PCKS cultures.

MARKER	TARGET	MEASURES	REFERENCE
α-SMA	Acetylated N-terminal of α-smooth muscle actin	Marker for activated fibroblasts	(unpublished)
P1NP	N-terminal pro-peptide of collagen type I	Formation of collagen type I	25
C1M	MMP-generated collagen type I fragment	Degradation of collagen type I	26
C3M	MMP-generated collagen type III fragment	Degradation of collagen type III	27