Abstract
We have designed a chimeric promoter that can be stimulated by various pro-inflammatory mediators and so drive the expression of therapeutic genes under inflammatory conditions. The promoter has two parts, the [−247/+20] fragment of the human type IIA secreted phospholipase A2 gene promoter, which is stimulated by the pro-inflammatory cytokine interleukin-1β (IL-1β), and a double peroxisome proliferator-activated receptor response element that is activated by some eicosanoids and by non-steroidal anti-inflammatory drugs (NSAIDs). Transfection experiments using rabbit articular chondrocytes in primary culture showed that this chimeric promoter produced a low basal activity and was induced by NSAIDs, WY-14643, IL-1β, and 15-deoxy Δ 12,14 prostaglandin J2. The latter two compounds stimulated the promoter synergistically.
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