Prostaglandin-endoperoxide synthase 2 promoter (PTGS2 promoter) (PTGS2 promoter)

The Prostaglandin-endoperoxide synthase 2 (PTGS2) promoter, commonly known as the COX-2 promoter, is a regulatory DNA sequence located upstream of the PTGS2 gene that governs the inducible expression of the cyclooxygenase-2 enzyme [1]. Unlike the constitutively expressed COX-1, COX-2 expression is tightly regulated and rapidly induced by pro-inflammatory cytokines, growth factors, and tumor promoters through the activation of signaling cascades that culminate in the binding of transcription factors such as NF-κB, AP-1, and CREB to the promoter [2][3]. In chronic inflammatory diseases and various malignancies, the COX-2 promoter is often pathologically overactivated, leading to high levels of prostaglandins that promote inflammation, pain, and tumor cell survival [4][5]. Targeting the COX-2 promoter represents a transcriptional approach to therapy, aiming to prevent the synthesis of the enzyme at the source rather than inhibiting its activity post-translationally [6]. Drugs such as glucocorticoids exert their anti-inflammatory effects in part by repressing COX-2 promoter activity through the glucocorticoid receptor, while various small molecules and natural products target the upstream kinases that activate the necessary transcription factors [1][7]. This regulatory region is a focal point for research into selective anti-inflammatory agents that might avoid the gastrointestinal and cardiovascular side effects associated with traditional COX inhibitors [8].

Other names

COX-2 promoterCyclooxygenase-2 promoterhCOX-2 promoterPTGS2 regulatory regionPTGS2 promoter

Transcriptional repression via inhibition of transcription factor binding (e.g., NF-kappaB, AP-1, CREB) or recruitment of co-repressors to the PTGS2 promoter region, leading to decreased mRNA synthesis.