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Modulation of Extracellular Matrix Metabolism in Rabbit Articular Chondrocytes and Human Rheumatoid Synovial Cells by the Non-steroidal Anti-inflammatory Drug Etodolac. II: Glycosaminoglycan Synthesis

Author

Redini F

Date

11/1990

Journal

Agents Actions

Abstract

The effect of Etodolac on glycosaminoglycan (GAG) synthesis by human synovial cells and rabbit articular chondrocytes in culture was studied at doses ranging from 0.01 to 10 micrograms/ml. In chondrocyte cultures, short-term exposure to Etodolac decreased the total amount of GAGs (mainly chondroitin sulfate) affecting essentially the cell layer-associated fraction. When cells were incubated with Interleukin-1 (IL-1), Etodolac still exerted its inhibiting effect on GAG synthesis. Long-term exposure of chondrocytes to Etodolac caused a diminution of the total GAG synthesis for the highest concentration studied (1 micrograms/ml). IL-1 alone or in combination with Etodolac decreased the synthesis of GAGs suggesting that pretreatment with Etodolac cannot prevent the action of IL-1. In synoviocyte cultures, the drug caused an inhibition of the GAG biosynthesis (mainly hyaluronic acid). In presence of IL-1, Etodolac at the highest concentration partially diminished the stimulatory effect of IL-1. A 8-day exposure of the cells to Etodolac led to a decrease of GAG synthesis. In the same experiment, IL-1 alone caused a slight increase of GAG production that was not abolished by Etodolac treatment.

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