levels of plasminogen activator ( pa ) activity , a neutral proteinase which may contribute to cartilage destruction in arthritis , increased markedly in the cartilage/chondrocyte culture supernatants and in the chondrocyte cell layers in response to the stimulation of cultures with recombinant il-1 ( 1-100 u/ml ) .
C0007301
cartilage
C0225369
chondrocyte cell