OBJECTIVE: The effects of Cu2+ on human articular chondrocytes, arising from both N (normal) and OA (osteoarthritic) cartilage, were investigated "in vitro". METHODS: Chondrocytes, cultured in high density, were incubated with copper chloride (0.01-0.25 microM/mL). Proteoglycan and collagen were assessed by incorporation of [35S]-Sulfate and [3H]-Proline. SDS-PAGE analysis was performed to quantify the ratio of type II to type I collagen. RESULTS: Cu2+ neither increased proteoglycan synthesis by chondrocytes. of origin N or OA, nor influenced their proliferation rate. Collagen synthesis was increased. This effect is time and concentration dependant: in cultures treated for 12 days, collagen synthesis stimulation was +20% and +26% (P < 0.02) in N and OA cultures respectively, the ratio of type II to type I collagen was slightly increased. This effect was more obvious in OA cell lines than in N ones. CONCLUSION: The observations suggest that Cu2+ upregulates collagen anabolism in human articular chondrocytes.
OBJECTIVE: The effects of Cu2+ on human articular chondrocytes, arising from both N (normal) and OA (osteoarthritic) cartilage, were investigated "in vitro". METHODS: Chondrocytes, cultured in high density, were incubated with copper chloride (0.01-0.25 microM/mL). Proteoglycan and collagen were assessed by incorporation of [35S]-Sulfate and [3H]-Proline. SDS-PAGE analysis was performed to quantify the ratio of type II to type I collagen. RESULTS:Cu2+ neither increased proteoglycan synthesis by chondrocytes. of origin N or OA, nor influenced their proliferation rate. Collagen synthesis was increased. This effect is time and concentration dependant: in cultures treated for 12 days, collagen synthesis stimulation was +20% and +26% (P < 0.02) in N and OA cultures respectively, the ratio of type II to type I collagen was slightly increased. This effect was more obvious in OA cell lines than in N ones. CONCLUSION: The observations suggest that Cu2+ upregulates collagen anabolism in human articular chondrocytes.
Authors: Eleftherios A Makris; Regina F MacBarb; Donald J Responte; Jerry C Hu; Kyriacos A Athanasiou Journal: FASEB J Date: 2013-03-01 Impact factor: 5.191
Authors: Marta Milewska; Anna Burdzińska; Katarzyna Zielniok; Katarzyna Siennicka; Sławomir Struzik; Piotr Zielenkiewicz; Leszek Pączek Journal: Stem Cells Int Date: 2020-02-20 Impact factor: 5.443