further , supernatant from mcm stimulated chondrocytes , incubated with dead cartilage explants for 3 days , did not significantly increase proteoglycan release above the background level of cartilage alone ( 7-10 % ) , nor did the addition of 5 x 10 ( 4 ) pec to cultures of dead cartilage explants plus supernatant from mcm stimulated chondrocytes make any significant difference , indicating that supernatant from mcm stimulated chondrocytes and pec alone had negligible cartilage proteoglycan degrading activity in these experiments .
C0225369
chondrocytes
C0007634
pec